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EMC design of intelligent sensor system

Author: LongZuo
Tutor: HuZuoQuan
School: University of Electronic Science and Technology
Course: Electromagnetic Field and Microwave Technology
Keywords: Smart Sensor Systems EMC CMRR Harmonic currents Noise
CLC: TN03
Type: Master's thesis
Year: 2008
Downloads: 291
Quote: 2
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Abstract


With the advancement of technology , the electromagnetic environment has become increasingly complex , more and more high anti-jamming performance requirements of electronic equipment . Intelligent sensor system as one of the foundations of modern information technology , its electromagnetic compatibility design has become increasingly necessary . To address this issue , the paper part of the intelligent sensor system - the sensor drive circuit , signal conditioning circuits , power supply circuits , respectively, theoretical analysis and simulation study of noise suppression method , and then apply these analysis and simulation results to design a overall PCB circuit . Studied the constant voltage of the pressure sensor and the constant current drive mode , the analysis of the difference between them , the results show that the constant current drive mode is more suitable for high accuracy is needed occasions . Differential amplifier and instrumentation amplifier , and its common-mode rejection ratio and input impedance factors Theoretical analysis and simulation results show that three - op-amp instrumentation amplifier to meet the high common mode rejection ratio and input impedance of the circuit in the form , suitable for as a signal conditioning circuit . The power circuit , the impact of the size of the filter capacitor of the rectifier circuit for harmonic current theoretical analysis and simulation results show that the value of the filter capacitor should be considering the ripple voltage and harmonic current . The series regulator circuit with EMI filters , EMI filter interference suppression good results with the simulation results . The various components of the noise suppression measures . Application of the above measures , combined with the PCB EMC design followed the program design , device selection , layout and wiring guidelines for the MPX2010 piezoresistive pressure sensor design an interface circuit , and the circuit simulation and wiring .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > General issues > Structure
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