声表面波微压力传感器的信号调理电路设计
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摘要
声表面波传感器因其独特的设计原理,具有体积小,无源无线,精度高等特点,在物理和生物领域应用广泛。针对声表面波输出频率信号采集复杂的问题,该文设计了一类信号调理电路,通过谐振选频电路稳定输出信号,并通过滤波、放大、整形将输出信号转变为方波信号,最终得到易于采集处理的频率信号。通过Multisim仿真证明,该电路有良好的信号调理能力,易集成。这为声表面波微压力传感器的信号采集和处理奠定了基础。
The surface acoustic wave(SAW)sensor is widely used in physics and biological fields because of its characteristics of unique design principles,small size,passive wireless,and high precision.Aiming at the complex problem of SAW output frequency signal acquisition,a kind of signal conditioning circuit is designed in this paper.The output signal is stabilized by the resonant frequency selection circuit,and is transformed into a square wave signal by filtering,amplifying and shaping.Finally,the frequency signal which is easy to be collected and processed is obtained.The Multisim simulation shows that this circuit has good signal conditioning ability and is easy to be integrated.This lays the foundation for signal acquisition and processing of SAW micro pressure sensor.
The surface acoustic wave(SAW)sensor is widely used in physics and biological fields because of its characteristics of unique design principles,small size,passive wireless,and high precision.Aiming at the complex problem of SAW output frequency signal acquisition,a kind of signal conditioning circuit is designed in this paper.The output signal is stabilized by the resonant frequency selection circuit,and is transformed into a square wave signal by filtering,amplifying and shaping.Finally,the frequency signal which is easy to be collected and processed is obtained.The Multisim simulation shows that this circuit has good signal conditioning ability and is easy to be integrated.This lays the foundation for signal acquisition and processing of SAW micro pressure sensor.
引文
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[14]王阳阳,彭东林,陈锡侯,等.基于“互联网+”思维的时栅位移传感器研究[J].重庆理工大学学报(自然科学),2016(4):116-119.WANG Yangyang,PENG Donglin,CHEN Xihou,et al.Research on time-grating displacement sensor based on“internet plus”thinking[J].Journal of Chongqing University of Technology(Natural Science),2016(4):116-119.
[2] BINDER A,FACHBERGER R.Wireless SAW temperature sensor system for high-speed high-voltage motors[J].IEEE Sensors Journal,2011,11(4):966-970.
[3]张希.声表面波传感器及其在肺癌标志物与毒素快速检测中的应用研究[D].杭州:浙江大学,2017.
[4]董加和,陈运祥,冷俊林,等.ZnO/蓝宝石结构声表面波滤波器试验研究[J].压电与声光,2015,37(6):954-956.DONG Jiahe,CHEN Yunxiang,LENG Junlin,et al.An experimental study on SAW filter with ZnO/sapphire structure[J].Piezoelectrics&Acoustooptics,2015,37(6):954-956.
[5] WEI C L,CHEN Y C,CHENG C C,et al.Highly sensitive ultraviolet detector using a ZnO/Si layered SAW oscillator[J].Thin Solid Films,2010,518(11):3059-3062.
[6]文常保,党双欢,朱博,等.基于WIFI的无线声表面波传感器信号采集系统[J].传感技术学报,2015,28(10):1552-1557.
[7]李炜.声表面波传感器测试电路的研究[D].北京:北京信息科技大学,2007.
[8]王琼.无源无线声表面波温度传感器的设计[D].杭州:浙江大学,2011.
[9]张朋,陈明,何鹏举,等.基于电活性高分子声表面波CO气体传感器研究[J].压电与声光,2010,32(5):709-712.ZHANG Peng,CHEN Ming, HE Pengju,et al.Study on surface acoustic wave CO gas sensor based on electroactive polymers[J].Piezoelectrics&Acoustooptics,2010,32(5):709-712.
[10]武少南,卢文科.声表面波微力传感器的研究[J].仪表技术,2014(7):52-54.WU Shaonan,LU Wenke.A study of micro-force sensor for surface acoustic wave[J].Chinese Journal of Scientific Instrument,2014(7):52-54.
[11]李媛媛.声表面波微力传感器的研究[D].上海:东华大学,2014.
[12]王俊,李媛媛.柔性阵列式声表面波微力传感器的研究[J].化工自动化及仪表,2017,44(5):466-471.WANG Jun,LI Yuanyuan.Research on flexible array surface acoustic wave sensor[J].Control and Instruments In Chemical Industry,2017,44(5):466-471.
[13]陈业斌,王仁伟,李颖.无线传感器网络中基于采样的时空数据恢复[J].重庆理工大学学报(自然科学),2017(6):127-133.CHEN Yebin,WANG Renwei,LI Ying.Sampling aware based accurate spatial temporal data compleset for wireless sensor networks[J].Journal of Chongqing University of Technology(Natural Science),2017(6):127-133.
[14]王阳阳,彭东林,陈锡侯,等.基于“互联网+”思维的时栅位移传感器研究[J].重庆理工大学学报(自然科学),2016(4):116-119.WANG Yangyang,PENG Donglin,CHEN Xihou,et al.Research on time-grating displacement sensor based on“internet plus”thinking[J].Journal of Chongqing University of Technology(Natural Science),2016(4):116-119.