CONTENTS Microcontroller-based mobile wireless charger design Ding Xiaoxu,Guo Baifu,Like 1 Pedestrian Dead Reckoning Device Design Based on STM32.. ...Luo Yin:Lu Hongzhou:Zhao Yu:Wang Jun 6 Transit Passenger Flow Statistics System design................ .....Xueyan hu;Lu bai;Xingzhi han 11 Design and Implementation of the full range of sub-control intelligent lighting system LiNa;Zhang Tao;Ye Jiansong 15 Research on wireless synchronization device in superficial seismic exploration. Zhang Lin-hang:Pei Li-ran;Sun Zi-chao;Wang Cong 19 The Research of Sphere Lifting Height Automatic Control System Based on Air Pressure Control Qian Chenghui:Shi Zhaomin;Kang Lili,LiQi 25 The design of lowcost Vibroseis based on FPGA.Qian Chenghuil;Shi Zhaomin;Li qi:Xu qian 30 Design of Gravitational Acceleration Measuring Device Based on Balance Method Qian Chenghui,Chen Changsong 36 A3D scanning and laser ranging device based on Triangulation CHEN Hao:HAN Xing-Zhi,TANG Xiang-Mei;JIANG Tao 42 The Design and Implementation about attendance system used in campus classroom based on RFID technology. Li Jiaoyang.WuZiyu;Piao Guanyu 48 Intelligent Multifunctional lamp.Zhang Zhuo;Chen jie-yuan;Zhang Wei 54 XYZ three-axis stepper motor control system... NieYang.LiTengFei,LiuHui 58 The dormitory intelligent security alarm system based on GSM wireless communication. .JiaoLei,ZhaoYue:WangZhengyu 62 A post-disaster Detection Rescue Robot System Design.. ...HU Rui-fan;WANG Hong-chao;PENG Yi-shuai 66 Development of early detection instrument for apnea syndromeXuLi-xi Wang Gang.Lian Shi-bo71 Design of nRF905-based Wireless Greenhouse for Environmental Parameters Detection and Transmission System. .....YangShuXin;LiuYang:LengShuZhe 77 Wireless multi-point temperature and humidity detection system design based on nRF4101 Wu Jindi;Song Qihan,Zhao Xiaoyi 81 The teaching auxiliary system based on the light cube. .......Xin Yi,Zhu Zhanshan;Chen Xu;Jiang Jian 85 Intelligent alarm system based on Yixuan;Zhou Xianze;Liu Yan 88 The calculation of mutual inductance of two polygons with arbitrarily position. .LiuYang.HeShengmin 92 Design and Realization of a Secondary Reclosing Microcomputer Device Remotely and Interactively Controlled
I CONTENTS Microcontroller-based mobile wireless charger design .........................................Ding Xiaoxu; Guo Baifu; Like 1 Pedestrian Dead Reckoning Device Design Based on STM32...................................................................................... ......................................................................................................... Luo Yin; Lu Hongzhou; Zhao Yu; Wang Jun 6 Transit Passenger Flow Statistics System design................................................ Xueyan hu; Lu bai; Xingzhi han 11 Design and Implementation of the full range of sub-control intelligent lighting system .............................................. .............................................................................................................................. Li Na; Zhang Tao; Ye Jiansong 15 Research on wireless synchronization device in superficial seismic exploration.......................................................... ......................................................................................... Zhang Lin-hang; Pei Li-ran; Sun Zi-chao; Wang Cong 19 The Research of Sphere Lifting Height Automatic Control System Based on Air Pressure Control ............................ .................................................................................................... Qian Chenghui; Shi Zhaomin; Kang Lili; Li Qi 25 The design of lowcost Vibroseis based on FPGA.........................Qian Chenghui1; Shi Zhaomin; Li qi; Xu qian 30 Design of Gravitational Acceleration Measuring Device Based on Balance Method ................................................... ..........................................................................................................................Qian Chenghui; Chen Changsong 36 A 3D scanning and laser ranging device based on Triangulation .................................................................................. ...............................................................................CHEN Hao; HAN Xing-Zhi; TANG Xiang-Mei; JIANG Tao 42 The Design and Implementation about attendance system used in campus classroom based on RFID technology...... ......................................................................................................................Li Jiaoyang; Wu Ziyu; Piao Guanyu 48 Intelligent Multifunctional lamp.............................................................Zhang Zhuo; Chen jie-yuan; Zhang Wei 54 XYZ three-axis stepper motor control system......................................................... NieYang; LiTengFei; LiuHui 58 The dormitory intelligent security alarm system based on GSM wireless communication........................................... ..........................................................................................................................JiaoLei; ZhaoYue; WangZhengyu 62 A post-disaster Detection Rescue Robot System Design............................................................................................... ................................................................................................. HU Rui-fan; WANG Hong-chao; PENG Yi-shuai 66 Development of early detection instrument for apnea syndrome ................. Xu Li-xia; Wang Gang; Lian Shi-bo 71 Design of nRF905-based Wireless Greenhouse for Environmental Parameters Detection and Transmission System . .....................................................................................................................YangShuXin; LiuYang; LengShuZhe 77 Wireless multi-point temperature and humidity detection system design based on nRF24L01 .................................... ...................................................................................................................... Wu Jindi; Song Qihan; Zhao Xiaoyi 81 The teaching auxiliary system based on the light cube.................................................................................................. ..........................................................................................................Xin Yi; Zhu Zhanshan; Chen Xu; Jiang Jian 85 Intelligent alarm system based on MMS ....................................................Zhang Yixuan; Zhou Xianze; Liu Yan 88 The calculation of mutual inductance of two polygons with multiturn coils at arbitrarily position .............................. ...........................................................................................................................................LiuYang; HeShengmin 92 Design and Realization of a Secondary Reclosing Microcomputer Device Remotely and Interactively Controlled
by PC ......Han Si-yu;Wang Yu;Ma Jing 97 The Design and Implementation of Electromagnetic Radiation Detector ..Wang Di:Ren Tian-ming:Jiang Ming-jie 105 The manufacture and simulation for electromagnetical damping of fiber detector.. ...Jiang Ransong:Zhou Rui;Xue Bixi109 ntelligent House Leakage Detection and Alarm System Li Suyi;Wang Duoqiang:Bai Yang:Zhang Weijie 121 Office computer displayer ofelectromagnetic radiation measure and alarm system.. .Yuan Guiyang:Shen Chunyang.Liu Gucheng 127 The Multi-frequency Signal Generating Technology for the Shallow Surface Detection ...Liu Chang-sheng:Kang Pan:Xia Zheng-vang:Zheng Wei 131 Fuzzy control based on ultrasonic ranging parking system model design.. QIAN Cheng-hui:FU yu-jing.MIAO Hong-song:KANG-ning 137
II by PC ......................................................................................................................Han Si-yu; Wang Yu; Ma Jing 97 The Design and Implementation of Electromagnetic Radiation Detector ..................................................................... ...............................................................................................................Wang Di; Ren Tian-ming; Jiang Ming-jie 105 The manufacture and simulation for electromagnetical damping of fiber detector ....................................................... ....................................................................................................................... Jiang Ransong; Zhou Rui; Xue Bixi 109 Intelligent House Leakage Detection and Alarm System .............................................................................................. .................................................................................................Li Suyi; Wang Duoqiang; Bai Yang; Zhang Weijie 121 Office computer displayer of electromagnetic radiation measure and alarm system..................................................... ....................................................................................................... Yuan Guiyang; Shen Chunyang; Liu Gucheng 127 The Multi-frequency Signal Generating Technology for the Shallow Surface Detection ............................................. ....................................................................................Liu Chang-sheng; Kang Pan; Xia Zheng-yang; Zheng Wei 131 Fuzzy control based on ultrasonic ranging parking system model design..................................................................... ............................................................................QIAN Cheng-hui; FU yu-jing; MIAO Hong-song; KANG-ning 137
Ding Xiaoxu et:Microcontroller-based mobile wireless charger design Microcontroller-based mobile wireless charger design Ding Xiaoxu,Guo Baifu;Like (Jilin Universiry of Instrument Science and Electrical Engineering.Changchun 130012) Abstracr-In order to adapt to the wireless charging of implantable medical devices,sensors,municipal transportation and ow-power principle of electromagnetic induction,through energy coupling coil,to achieve energy transfer,the current control,voltage contro achieve transmission distance 5cm.the voltage reaches 5V,0.5A current steady power supply,after the prompt is given full power and full automatically stop charging.Charging voltage and charging current display with low power LCD1602.System has a wireless charging,emergy transfer effect is good,low cost,no wiring,easy to carry and other dva s-STC12C5A60S2 MCU intelligent wireless charging distance can reach 5-10cm,voltage 5V,0.5A current FOREWORD stable charging.Has simple,wireless transmission PHONE needs the corresponding charger.most single chip microcomputer and LCD power chargers can not be universal and compatible portable consumption is more,lead to the problem of lower wired charger and charge the user is not easy.So a no charging current,so use low-power chips and liquid charger charging technology to be developed.Nokia crystal display,the charging current can be improved. 920 handset with a wireless charging technology I THE HARDWARE SYSTEM DESIGN receiving end have a coil,transmitter coil is connected wired power generating electromagnetic signals. The wireless charging system design using Receiver coil induction sending electromagnetic electromagnetic induction principle,the use of coil signals to generate current to the battery.But Nokia coupling to transfer energy.Due to the wireless 920 wireless charging.y you need to put the ssion of power voltage with energy sending corresponding wireless charging plate,on more thar unit and receiving unit coupling coil spacing D may 2 cm can not be charged,and the production process is change in the test.lead to different charging voltage complicated,expensive,visible increase the change of distance,design considerations for safety,so transmission distance is a wireless charging charging ways on the choice of constant voltage technology should pay attention to the issue.This scheme.On the device select select has design uses the same principle of electromagnetic variety of power saving mode.power consumptior induction to generate energy through the coil coupling province in particular,Strong anti-interference force of hardware circuits are transmitting and receiving ends MSP430 ultra-low power MCU series MSP430F2274 of two parts,transmitter using NE555 with the RC as monitoring of wireless transmission can charger oscillation circuit constituted,as a power amplifier control core chip,voltage and charging time display using FET devices;Receive omprised BUCK ith low power c onsumption LCD1602 LCD screer chopper circuit voltage type step-down DC/DC to improve the utilization efficiency of the energy of conversion circuit realized steady flow.Transmission the charging circuit
Ding Xiaoxu etc.: Microcontroller-based mobile wireless charger design 1 Microcontroller-based mobile wireless charger design Ding Xiaoxu; Guo Baifu; Like (Jilin University of Instrument Science and Electrical Engineering, Changchun 130012) Abstract—In order to adapt to the wireless charging of implantable medical devices, sensors, municipal transportation and other aspects of the application, Change the current electronic charging interface incompatibilities. The design uses a low-power microcontroller STC12C5A60S2 energy transfer charger as a wireless monitoring and control core，based on the principle of electromagnetic induction, through energy coupling coil, to achieve energy transfer, the current control, voltage control, achieve transmission distance 5cm, the voltage reaches 5V, 0.5A current steady power supply, after the prompt is given full power and full automatically stop charging。Charging voltage and charging current display with low power LCD1602.System has a wireless charging, energy transfer effect is good, low cost, no wiring, easy to carry and other advantages, has a broad application prospects. Keywords—STC12C5A60S2 MCU intelligent wireless charging FOREWORD PHONE needs the corresponding charger, most chargers can not be universal and compatible portable wired charger and charge the user is not easy. So a no charger charging technology to be developed. Nokia 920 handset with a wireless charging technology, using electromagnetic induction principle, sending and receiving end have a coil, transmitter coil is connected wired power generating electromagnetic signals, Receiver coil induction sending electromagnetic signals to generate current to the battery. But Nokia 920 wireless charging, you need to put the corresponding wireless charging plate, once more than 2 cm can not be charged, and the production process is complicated, expensive, visible increase the transmission distance is a wireless charging technology should pay attention to the issue. This design uses the same principle of electromagnetic induction to generate energy through the coil coupling, hardware circuits are transmitting and receiving ends of two parts, transmitter using NE555 with the RC oscillation circuit constituted, as a power amplifier using FET devices; Receive comprised BUCK chopper circuit voltage type step-down DC/DC conversion circuit realized steady flow. Transmission distance can reach 5-10cm, voltage 5V, 0.5A current stable charging. Has simple, wireless transmission distance is long, low-cost advantage. In the design of single chip microcomputer and LCD power consumption is more, lead to the problem of lower charging current, so use low-power chips and liquid crystal display, the charging current can be improved. 1 THE HARDWARE SYSTEM DESIGN The wireless charging system design using electromagnetic induction principle, the use of coil coupling to transfer energy. Due to the wireless transmission of power voltage with energy sending unit and receiving unit coupling coil spacing D may change in the test, lead to different charging voltage change of distance, design considerations for safety, so charging ways on the choice of constant voltage charging scheme. On the device select select has a variety of power saving mode, power consumption province in particular, Strong anti-interference force of MSP430 ultra-low power MCU series MSP430F2274 as monitoring of wireless transmission can charger control core chip, voltage and charging time display with low power consumption LCD1602 LCD screen, to improve the utilization efficiency of the energy of the charging circuit
The English Proceedings of the College of Instrumen ation Electrical Engi eering.Jiin University,in the Second Halfof2013 Raltiecra Fig.I System architecture generating maximum altemating field consists of resonant achieve the best signal generator and a power amplifier,Shown in 1.2 Design of the half-bridge inverter circui Figure 2.Using NE555 constitute approximately Shown on the right in Figure 2 half-bridge inverter 55KHZ oscillation frequency of the signal generator, eireuit,half-bridge eircuit composed by two MOS which provides incentives for the signal amplifier switch.When the MOS transistor QI turns on,Q5 up circuit Resonant Power consists of LC current from the MOS transistor and go throug parallel resonant circuit and switch.Oscillation coil the LC circuit to ground.When the MOS transistor Q has a diameter of 0.50 mm enameled wire tightly is turned on,Q1 up,the current through Q2,LC to the wound 30 ring as required.Inductance value of about ground.So the cycle continues.direct current into 90 uH.Seen from the formula. alternating current by inverse.in order to transmit LC 1 circuit.Using IR2104 as the driver of MOS transistor f= chip.is a high voltage. When the resonance is at 55 KHZ,the capacitor value Q1 is turned on or off,which is controlled by the of C16 is about 0.luF.The resonant frequency of output of HO and LO control Q5 on and off,so as to control the half-bridge of the excitation signal in the e powe amplifiers.PA resonance,at this point the voltage and current in the coil reaches the maximum,thereby 2
期 The English Proceedings of the College of Instrumentation & Electrical Engineering, Jilin University, in the Second Half of 2013 2 Fig.1 System architecture 1.1 Oscillator circuit design Transmitter circuit consists of resonant oscillation signal generator and a power amplifier, Shown in Figure 2.Using NE555 constitute approximately 55KHZ oscillation frequency of the signal generator, which provides incentives for the signal amplifier circuit. Resonant Power Amplifier consists of LC parallel resonant circuit and switch. Oscillation coil has a diameter of 0.50 mm enameled wire tightly wound 3O ring as required. Inductance value of about 90 uH. Seen from the formula. 1 2 f π LC = When the resonance is at 55 KHZ, the capacitor value of C16 is about 0.1uF.The resonant frequency of frequency selection circuit is the same as the frequency of the excitation signal in the power amplifiers. PA resonance, at this point the voltage and current in the coil reaches the maximum, thereby generating maximum alternating electromagnetic field, achieve the best effect of energy transfer. 1.2 Design of the half-bridge inverter circuit Shown on the right in Figure 2 half-bridge inverter circuit, half-bridge circuit composed by two MOS switch. When the MOS transistor Q1 turns on, Q5 up, current from the MOS transistor Q1 and go through the LC circuit to ground. When the MOS transistor Q5 is turned on, Q1 up, the current through Q2, LC to the ground. So the cycle continues, direct current into alternating current by inverse, in order to transmit LC circuit. Using IR2104 as the driver of MOS transistor chip,IR2104 is a high voltage, high speed power MOSFET and IGBT driver, operating voltage 10-20V. Q1 is turned on or off ,which is controlled by the output of HO and LO control Q5 on and off, so as to control the half-bridge
Ding Xiaoxu ete.:Microcontroller-based mobile wireless charger design 一RB360 R210 DI0 R38 N4148 Fig 2 The hardware circuit 1.3 BUCK chopper circui negative feedback of the DC/DC converter is fixed DC voltage into a the 15/16 feet of KA7500B.After power variable DC voltage,also called DC chopper.Buck microcontroller output PWM voltage,to KA7500B 15 circuit is a step-down chopper.The output average feet as the voltage reference.Output voltage through voltage Uo is less than the input voltage Ui.the same the voltage sampling resistor divider in the front compared with the voltage reference.when the voltage is too large.decrease the puse width when the voltae converter.BUCK converter also known as buck is too small,increase the pulse width,so that it converter,the series switching power supply, remains constant output voltage value.while the three-terminal switching buck regulator. output voltage set by key,ensure maximum output 1.3.I KA7500B Introduction and working principle voltage and current does not exceed the rated battery Circuit depicted in Figure3 is essentiallya powe supply circuit,with constant current/constant voltage output.It comes with two way feedback circuit that is output voltage to the following formula current feedback and voltage feedback.wherein the current feedback positive and negative corresponds to '=PwWM◆6.49k 10k the 1/2 feet of KA7500B.Outpu current pro voltage drop at the current sampling resistor The 2 PROCEDURAL FRAMEWORK FOR THE WHOLE SYSTEM pressure drop through resistor R9,R10 and R14,R15 feedback back.When KA7500B feetl voltage is The overall design work is mainly achieved by the greater than the first voltage feet2.KA7500B will microcontroller program control.which works as reduce the output pulse width (811 feet),the current follows:the ciruit startinitialization,the circuit is reduced,or increas tha the oupu funct seection output select and determine th current is constant at the default value,the curren output,the microcontroller calculates the output PWM value of the following formula: signal acquisition,regular data collection and 0.59K processing adjust the PWM signal duty,etc.,done by I=PWM* 0.59K+20/R adjusting the duty cycle voltage 2.1overall framework of the program shownin Figure Where R is the current sampling resistor,positive and 3
Ding Xiaoxu etc.: Microcontroller-based mobile wireless charger design 3 TRIG 2 OUT 3 RST 4 CVOLT 5 THR 6 DISC 7 VCC 8 GND 1 U3 NE555N +12V C19 0.1UF C16 100p R36 1K R47 1K R38 4.7K Q5 IRFB3607 Q1 IRFB3607 R37 47 R46 47 C15 0.1UF 90uH L3 C14 470uF R45 1K D6 LED R40 10K VCC 1 COM 4 VB 8 HO 7 VS 6 LO 5 IN 2 SD 3 U4 IR2104 D8 1N5819 C18 22uF C17 0.1UF 10K R41 Res Tap D9 1N4148 D10 1N4148 Fig.2 The hardware circuit 1.3 BUCK chopper circuit DC / DC converter is fixed DC voltage into a variable DC voltage, also called DC chopper. Buck circuit is a step-down chopper. The output average voltage U0 is less than the input voltage Ui, the same polarity, In this circuit, the input is always greater than the output, so we use pulse width modulation BUCK converter, BUCK converter also known as buck converter, the series switching power supply, three-terminal switching buck regulator. 1.3.1 KA7500B Introduction and working principle Circuit depicted in Figure 3 is essentially a power supply circuit, with constant current / constant voltage output. It comes with two way feedback circuit that is current feedback and voltage feedback, wherein the current feedback positive and negative corresponds to the 1/2 feet of KA7500B.Output current produces a voltage drop at the current sampling resistor, The pressure drop through resistor R9, R10 and R14, R15 feedback back. When KA7500B feet1 voltage is greater than the first voltage feet2. KA7500B will reduce the output pulse width (8, 11 feet), the current is reduced, or increased pulse, so that the output current is constant at the default value, the current value of the following formula: 0.59 * / (0.59 20 ) K I PWM R K K = + Where R is the current sampling resistor, positive and negative feedback of the circuit voltage corresponds to the 15/16 feet of KA7500B. After power, microcontroller output PWM voltage, to KA7500B 15 feet as the voltage reference. Output voltage through the voltage sampling resistor divider in the front , compared with the voltage reference, when the voltage is too large, decrease the pulse width when the voltage is too small, increase the pulse width, so that it remains constant output voltage value, while the output voltage set by key, ensure maximum output voltage and current does not exceed the rated battery charging limitations imposed by the receiving end of a USB cable to connect the phone charging port, its output voltage to the following formula: 16.49 *( ) 10 out k V PWM k = 2 PROCEDURAL FRAMEWORK FOR THE WHOLE SYSTEM The overall design work is mainly achieved by the microcontroller program control, which works as follows: the circuit startinitialization, the circuit function selection, output select and determine the output, the microcontroller calculates the output PWM signal acquisition, regular data collection and processing adjust the PWM signal duty, etc., done by adjusting the duty cycle voltage. 2.1 overall framework of the program shown in Figure 4
The English Proceedings of the College of Instrumentation&Electrical Engineering.n University,in the Second Halfof 013 WM2 ig3DC/DC inverte leeds to be Charge The system ente standby mode End Fig4 System program flow chart 2.2 Charging subroutine design charge current will gradually be reduced to zero,the irst stage is the constant voltage charging.the charging voltage can be set,when the charging voltage charged,the"fully charged"indicator is lit green.As reaches 4.2V,is transferred to the second stage,that is the mobile phone's battery and charging distance are 4.2V constant voltage charging.constant voltage different,electricity charged into the mobile phone charging current will increase gradually decreased battery is different.The capacity of the ithum battery over time.until the charge curent drops to 10mA.i of Small wasps and HTCONEX are 1420mAh and indicates that the battery has been charged to the rated 2000mAh used in the experiment.For example,the capacity of 90%to 95%.At this point it can be third row of Table I:Lithium Output voltage 3.7v, considered basic full,if we continue to charge it,the transmitter terminal voltage and current of 12V and 4
期 The English Proceedings of the College of Instrumentation & Electrical Engineering, Jilin University, in the Second Half of 2013 4 AR1 LM358 R20 1K AD1 C5 0.1UF AD0 1 (+)1 2 (-)1 3 FB 4 DTC 5 CT 6 RT 7 GND 8 C1 10 E2 9 E1 C2 251 12 VCC 13 OC 14 RO 15 (-)2 16 (+)2 RP1 KA7500B T1 PNP R15 100 R3 510 D4 IN5819 L1 100uH C3 470uF C2 470uF USB+ USBR2 6.49k R18 10K R29 1K C9 0.1UF C10 0.01UF C13 0.01UF R34 10K R32 300 C11 3.3UF PWM1 PWM2 R22 590 R23 590 R30 20k C8 0.1UF 100K R21 R16 100k R24 R26 100k 1K +5V D2 SR260 R33 20K R25470 差分放大电路 RC滤波 RC滤波 RC滤波 R4 0.05 C4 0.1UF R5 10k Vin 1 GND 2 Vout 3 U1 LM2940 C1470uF +5 D1 LED R1 1K R28 10K R31 1K D3 SR260 90uH L2 USB 单片机电源 N2 N2 Fig.3 DC/DC inverter Fig.4 System program flow chart 2.2 Charging subroutine design Charging process is divided into two phases, the first stage is the constant voltage charging, the charging voltage can be set, when the charging voltage reaches 4.2V, is transferred to the second stage, that is 4.2V constant voltage charging, constant voltage charging current will increase gradually decreased over time, until the charge current drops to 10mA, it indicates that the battery has been charged to the rated capacity of 90% to 95%.At this point it can be considered basic full, if we continue to charge it, the charge current will gradually be reduced to zero, the battery is fully charged. Specific charging process, "charge" red light is lit; when the battery is fully charged, the "fully charged" indicator is lit green. As the mobile phone's battery and charging distance are different, electricity charged into the mobile phone battery is different. The capacity of the lithium battery of Small wasps and HTCONEX are 1420mAh and 2000mAh used in the experiment. For example, the third row of Table I: Lithium Output voltage 3.7v, transmitter terminal voltage and current of 12V and Start Initializatio Needs to be Charge monitoring The system enters standby mode End
Ding Xiaoxu ete:Microcontroller-based mobile wireless charger design AD73311 universal analog front-end principle and Pus=3.7×2×0.4=3.0m its application in speech processing Electronic technology,1999(8):53-55 PLmch =12x1=12w 7=n=30×100%=25% Form I The actual charge Phone Charge into the Time(min) Distance electricity (cm) Small 30% 30 6 wasp Small 40% 30 HTONEX 40% 60 5 HTONEX 10% 30 8 3CONCLUSIONS This design enables the transmission distance of 5-10cm,it is suitable for most mobile phones interface, a wireless charging.and it solves the issue that wired design,so easy to debug and troubleshooting But charging a bit low,the transmission distance is shorter. if in-depth study,by increasing the supply voltage to 24V or increasing radius of the coil.If PWM can be produced chips.whichcan reduce the burden on the microcontroller,and can improve the circuit output accuracy. References [1]Xiao Zhijian,Han Zhenyu,Li Shaozhuo about the new wireless charging portable electronic device system research []Automation and Applications 2007,12:114-116. [2]Digital Voice Systems.Inc.AMBE1000 Vocoder ChipUsers Manual Version 4.1 [M]2004-04. [3]Zhou Ligong.Zhang.Easy ARM7 [M].Beijing Aerospace University Press,2005:52-53.70-90. [4]Zhang Xin Yi,Luton Lu,Zhang Youwei
Ding Xiaoxu etc.: Microcontroller-based mobile wireless charger design 5 1A. PRMS = 3.7 × 2× 0.4 = 3.0w PLaunch =12×1 =12w 100% 25% 12 3.0 = = × = Launh RMS P P η Form.1 The actual charge Phone Charge into the electricity Time（min） Distance （cm） Small wasp 30% 30 6 Small wasp 40% 30 5 HTONEX 40% 60 5 HTONEX 10% 30 8 3 CONCLUSIONS This design enables the transmission distance of 5-10cm, it is suitable for most mobile phones interface, a wireless charging, and it solves the issue that wired charging port is not compatible inconvenient to carry .System hardware and software are modular in design, so easy to debug and troubleshooting.But charging a bit low, the transmission distance is shorter, if in-depth study, by increasing the supply voltage to 24V or increasing radius of the coil. If PWM can be produced by separate chips, which can reduce the burden on the microcontroller, and can improve the circuit output accuracy. References [1] Xiao Zhijian, Han Zhenyu, Li Shaozhuo about the new wireless charging portable electronic device system research [J]. Automation and Applications 2007,12:114-116. [2] Digital Voice Systems. Inc. AMBE1000 Vocoder ChipUsers Manual Version 4.1 [M] .2004-04. [3] Zhou Ligong, Zhang. Easy ARM7 [M]. Beijing: Aerospace University Press,2005:52-53,70-90. [4] Zhang Xin Yi, Luton Lu, Zhang Youwei. AD73311 universal analog front-end principle and its application in speech processing [J]. Electronic technology, 1999 (8) :53-55
The English Proceedings of the College of Instru ion&Electrical Engineering.n University,in the Second Half of 013 Pedestrian Dead Reckoning Device Design Based on STM32 Luo Yin,Lu Hongzhou,Zhao Yu,Wang Jun College of Instrumentation and Electrical Engineering.Jilin University.Changchun 130012. China Abstract-We put forward a new design of pedestrian dead reckoning device based on the portability and practicality.The device uses lsM303DLHC integrated with a three-dimensional ascelerometer and an eleetronis compassand MPU3050 the mationof Pedestrian.T Cortex-M3 dead-reckoning information of pedestrian on a TFTLCD.Experiments prove that the device has the high precision of dead-reckoning and satisfies the requirement of practical application. Key words-STM32F103RBT6:multi-sensor:heading:step count:track display sofware on the computer,it is not very useful,while in INTRODUCTION the outdoor,the portability of the computer is not high so the development of a portable.practical pedestrian IN the wild woodlands,rocky areas or the urban region dead reckoning device is very necessary for the above of design shortcomings combined with the characteristics ng navigatio of pedestrians dead recko ingwe design a portable will descend because of the signal block,it even can't and practical pedestrian dead reckoning device.It uses finish positioning in some circumstances.Therefore in three-dimensional accelerometer and electronic recent years self-contained positioning scheme based compass integrated chip LSM303DLHC and on movement characteristics for pedestrians has gyroscope integrated chip MPU3050.multiple sensors become a research hot po Most of the accuracy y of collected i solutions use wearable to complet movement.and ARM Cortex .M3 pedestrian dead reckoning(PDR).such as Lei FangI micro-controller core STM32F103RBT6 as a data extracted motion information by the sensors worn or processing unit The real-time processing pedestrian the pedestrian waist and transmitted the informatior dead reckoning information is displaved on a to the computer to complete pedestrian dead TFTLCD,which has high data processing accuracy reckoning Laur Ojeda2]set the gyroscope and also meet the needs of portability and practicality three-dimensional accelerometer on the foot to extrac information then transmitted it to a computer and use 1 SYSTEM COMPOSITION AND WORKING PRINCIPLE Matlab software for 3D image processing.SUN Zuolei[]used the particle filter and probabilistic The pedestrian dead reckoning device contains a neural network to identify andflte heading sensc motion information and improved the accuracy of a display module,the specific composition diagram is pedestrian dead reckoning.However,the information shown in Figure I. of PDR of these designs is produced by specialized
期 The English Proceedings of the College of Instrumentation & Electrical Engineering, Jilin University, in the Second Half of 2013 6 Pedestrian Dead Reckoning Device Design Based on STM32 Luo Yin,Lu Hongzhou,Zhao Yu,Wang Jun College of Instrumentation and Electrical Engineering,JiLin University,Changchun 130012， China Abstract—We put forward a new design of pedestrian dead reckoning device based on the portability and practicality.The device uses LSM303DLHC integrated with a three-dimensional accelerometer and an electronic compass,and MPU3050 integrated with a gyroscope to collect the real-time movement information of pedestrian.The Cortex-M3 core STM32F103RBT6 in the device collects data produced by the sensors,performs pedestrian dead reckoning and displays the dead-reckoning information of pedestrian on a TFTLCD.Experiments prove that the device has the high precision of dead-reckoning and satisfies the requirement of practical application. Key words—STM32F103RBT6;multi-sensor;heading;step count；track display INTRODUCTION IN the wild woodlands, rocky areas or the urban region located with skyscrapers,the positioning accuracy of global satellite positioning navigation system(GPRS) will descend because of the signal block,it even can’t finish positioning in some circumstances.Therefore in recent years,self-contained positioning scheme based on movement characteristics for pedestrians has become a research hot spot.Most of the adopted solutions use wearable multi-sensor to complete pedestrian dead reckoning(PDR),such as Lei Fang[1] extracted motion information by the sensors worn on the pedestrian waist and transmitted the information to the computer to complete pedestrian dead reckoning.Lauro Ojeda[2] set the gyroscope and three-dimensional accelerometer on the foot to extract information then transmitted it to a computer and use Matlab software for 3D image processing.SUN Zuolei[3] used the particle filter and probabilistic neural network to identify and filter the pedestrian motion information and improved the accuracy of pedestrian dead reckoning.However, the information of PDR of these designs is produced by specialized software on the computer,it is not very useful,while in the outdoor, the portability of the computer is not high, so the development of a portable, practical pedestrian dead reckoning device is very necessary.For the above design shortcomings combined with the characteristics of pedestrians dead reckoning,we design a portable and practical pedestrian dead reckoning device.It uses three-dimensional accelerometer and electronic compass integrated chip LSM303DLHC and gyroscope integrated chip MPU3050, multiple sensors ensure the accuracy of collected information of pedestrian movement,and ARM Cortex-M3 micro-controller core STM32F103RBT6 as a data processing unit.The real-time processing pedestrian dead reckoning information is displayed on a TFTLCD, which has high data processing accuracy and also meet the needs of portability and practicality. 1 SYSTEM COMPOSITION AND WORKING PRINCIPLE The pedestrian dead reckoning device contains a heading sensor module, a data processing module and a display module, the specific composition diagram is shown in Figure 1
Luo Yin etc.:Pedestrian Dead Reckoning Device Design Based on STM32 Accelerometer Elect- Data Data ronic compass SDCard LSMB03DLHC STMB2F103 RBT6 RBT6 Gyroscope PU3050 9320 Figure 1 Block diagram of the systen The three-dimensional senso module is divided 128KB.RAM memory capacity of 20KB.Has eight into the triaxial accelerometer and electronic compass timer counters,3 SPL,2 IIC,3 UART,I USB,I CAM integrated chip LSM303DLHC and gyroscope and other communication ports.these ports are fully integrated chip MPU3050 and micro-controller able to meet the needs in the design process. STM32F103RBT6 for data processing.The The STM32F103RBT6 chip is supplied with 3.3V three-dimensional sensor module is placed on the the external p SV batteries,so waist of the pedestrian while it is working.the a buck chip AMS1117-3.3 is adopted,the outpu three-dimensional accelerometer collects the voltage can be lowered and stabilized at 3.3V,with 1% acceleration in three directions,use it to calculate the accuracy. tilt angle and the pitch angle and estimates the numbe 2.2 Three-dimensional sensor module design of steps and stride of the pedestr an. The LSM303DLHC chip can work in 2.16V~3.6V compcolcreal-tim re low voltage,the measurement range of its buil-ir of pedestrian.The gyroscope measured three axis three-dimensional accelerometer measurement range angular velocity to correct the calculated pitch angle is±2g~±16g.the measurement range ofof the and the tilt angle in the unit time.The MCU is electronic compass range can be 1.3 ~+8.1 gauss responsible for converting raw sensor datauses the The micro-controller performs the IIc bus through the SCL and the SDA module.The core data proces ing module also uses pin.While the contents of register CTRLREG4 is single STM32F103RBT6 chip.while it is seria edited the three dimensional acceleration measurement communicating with the three-dimensional senso range can be set.and the electronic compass range can module.the required data of PDR is stored through the be set through the register CRB REG M.Its FAT32 file system in a SD card at the same time.The s is shown in Figure 2 TFTLCD ILI9320.when the MPU3050 works in 2.1V 3.6V low voltage,its pedestrian needs to view the current information of built-in three-axis gyroscope can measure the direction PDR the micro-controller calls up the original data via of±250。/s~±2000。/s angular the FAT32 file system from the SD card and performs displacement.Editing the content of its register PDR,then the track of pedestrian will be displayed on DIPF FS can choosevscope'working range. theTFTLCD. while the micro-contoe r reac out the original data of registers X_OFFS_USRH L 2 HARDWARE DESIGN Y OFFS USRH/L.Z OFFS USRH/L through the IIC bus,and its peripheral circuits is shown in Figure 3. 2.1 Master chip and peripheral circuit design The maste and the slave botha STs ARM Cortex-M3 core with industrial-grade control chip STM32F103RBT6,it has 72MHz clock frequency,the internal ROM storage capacity of
Luo Yin etc.: Pedestrian Dead Reckoning Device Design Based on STM32 7 Figure 1 Block diagram of the system The three-dimensional sensor module is divided into the triaxial accelerometer and electronic compass integrated chip LSM303DLHC and gyroscope integrated chip MPU3050 and micro-controller STM32F103RBT6 for data processing.The three-dimensional sensor module is placed on the waist of the pedestrian while it is working,the three-dimensional accelerometer collects the acceleration in three directions, use it to calculate the tilt angle and the pitch angle and estimates the number of steps and stride of the pedestrian.The electronic compass collects real-time heading data real time data of pedestrian.The gyroscope measured three axis angular velocity to correct the calculated pitch angle and the tilt angle in the unit time.The MCU is responsible for converting raw sensor data,uses the serial port for communication with the data processing module. The core data processing module also uses a single STM32F103RBT6 chip,while it is serial communicating with the three-dimensional sensor module, the required data of PDR is stored through the FAT32 file system in a SD card at the same time.The display module uses TFTLCD ILI9320, when the pedestrian needs to view the current information of PDR,the micro-controller calls up the original data via the FAT32 file system from the SD card and performs PDR,then the track of pedestrian will be displayed on the TFTLCD. 2 HARDWARE DESIGN 2.1 Master chip and peripheral circuit design The master and the slave micro-controllers both are ST's ARM Cortex-M3 core with industrial-grade control chip STM32F103RBT6, it has 72MHz clock frequency, the internal ROM storage capacity of 128KB, RAM memory capacity of 20KB. Has eight timer counters, 3 SPI, 2 IIC, 3 UART, 1 USB, 1 CAN and other communication ports, these ports are fully able to meet the needs in the design process. The STM32F103RBT6 chip is supplied with 3.3V voltage , the external power supply is 5V batteries, so a buck chip AMS1117-3.3 is adopted, the output voltage can be lowered and stabilized at 3.3V,with 1% accuracy. 2.2 Three-dimensional sensor module design The LSM303DLHC chip can work in 2.16V ~ 3.6V low voltage, the measurement range of its built-in three-dimensional accelerometer measurement range is ± 2g ~ ± 16g, the measurement range of of the electronic compass range can be ± 1.3 ~ ± 8.1 gauss, The micro-controller performs the IIC bus communication through the SCL and the SDA pin.While the contents of register CTRL_REG4 is edited,the three dimensional acceleration measurement range can be set, and the electronic compass range can be set through the register CRB_REG_M.Its peripheral circuits is shown in Figure 2. MPU3050 works in 2.1V ~ 3.6V low voltage, its built-in three-axis gyroscope can measure the direction of ± 250 ° / s ~ ± 2000 ° / s angular displacement.Editing the content of its register DLPF_FS can choose gyroscope’s working range, while the micro-controller read out the six-axis original data of registers X_OFFS_USRH / L, Y_OFFS_USRH / L, Z_OFFS_USRH / L through the IIC bus,and its peripheral circuits is shown in Figure 3
The English Proceedings of the College of Instru tion&Electrical Engineering.n University,in the Second Half of 013 Figure 2 LSM303DLHC schem Figure 3 MPU3050 schematic 2.3 Data storage and display module design The master micro-controller which is responsible SD CAR for PDR communicates with the three-dimensional CDD CM M國 sensor module through the serial port,they are set to VCC3.3 the same baud rate.Since the built-in RAM capacity SPII SCK of STM32F103RBT6 is only 20KB. and dead reckoning data used in the process is much larger than 11 the amount of memory capacity.the FAT32 file system is used to help the host micro-controller store data into an SD card.the micro-controller write or read data via SPI interface,the data storage module schematic is sd card shown in Figure 4. Figure 5 Display module schematic The display module uses TFTLCD ILI9320 produced by the llitek,the operating voltage is 3.3V,it 3 SOFTWARE DESIGN has a resolution of 320x240,16-bit bidirectional data line,the micro-controller via the WR pin to write the 3.1 Dead reckoning principle TFTLCD read ou dat through the The motion of pedestrian can be considered as RD pin,the schematic of the display module is shown two-dimensional motion in general4,connectior in Figure 5. between the two foothold in a step cycle can be considered as a straight line.When the data sampling time is a step cycle,the information of pedestrian at the end of the current ycle can be calculated by the length and heading angle information sampled at end of the last sample cvcle.Showed in two-dimensional xy coordinate plane.let us suppose that the orientation of the pedestrian in initial time is (),the 33 orientation of an arbitrary time is (x yt),within each sampling period walker steps is S,heading angle 3i T CLK TFT LCD is A.then a step in accordance with the sampling period is T.According to the principle of recursive,the orientation of pedestrian at any time t may be ssed as:
期 The English Proceedings of the College of Instrumentation & Electrical Engineering, Jilin University, in the Second Half of 2013 8 Figure 2 LSM303DLHC schematic Figure 3 MPU3050 schematic 2.3 Data storage and display module design The master micro-controller which is responsible for PDR communicates with the three-dimensional sensor module through the serial port, they are set to the same baud rate. Since the built-in RAM capacity of STM32F103RBT6 is only 20KB, and dead reckoning data used in the process is much larger than the amount of memory capacity, the FAT32 file system is used to help the host micro-controller store data into an SD card, the micro-controller write or read data via SPI interface, the data storage module schematic is shown in Figure 4. The display module uses TFTLCD ILI9320 produced by the Ilitek,the operating voltage is 3.3V, it has a resolution of 320 × 240, 16-bit bidirectional data line, the micro-controller via the WR pin to write the data into the TFTLCD and read out data through the RD pin, the schematic of the display module is shown in Figure 5. Figure 4 Data storage module schematic Figure 5 Display module schematic 3 SOFTWARE DESIGN 3.1 Dead reckoning principle The motion of pedestrian can be considered as two-dimensional motion in general[4], connection between the two foothold in a step cycle can be considered as a straight line.When the data sampling time is a step cycle, the information of pedestrian at the end of the current cycle can be calculated by the orientation information with the sampling period stride length and heading angle information sampled at end of the last sample cycle.Showed in two-dimensional xy coordinate plane, let us suppose that the orientation of the pedestrian in initial time is (x0 , y0), the orientation of an arbitrary time is (xt , yt), within each sampling period walker steps is S, heading angle is A, then a step in accordance with the sampling period is T. According to the principle of recursive, the orientation of pedestrian at any time t may be expressed as:
