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中文摘要：
压电式传感器以其良好的性能在结构健康监测领域得到了广泛应用,而电荷放大器则是压电式传感器最主要的测量电路,但目前的独立电荷放大器体积较大,不适于系统集成。为此设计了一种基于外围设备互连总线（PXI）的插卡式多通道程控增益电荷放大器,它由电荷转换电路、滤波电路、反向跟随电路、PXI控制电路组成,实现放大倍数和灵敏度可调。经性能测试,设计的电荷放大器具有通频带宽、性能稳定、一致性好的优点,满足实际工程应用要求。
英文摘要：
Piezoelectric sensor has been used widely in the structural health monitoring for its excellent performance and the charge amplifier is the main measure circuit for piezoelectric sensor.The charge amplifier existed is too large for system integrating.In order to solve this problem,a multi-channel programmable charge amplifier based on PXI bus is designed.The charge amplifier is composed of the charge transform circuit,filter circuit,reverse circuit and Peripheral component interconnect extension for instrumentation（PXI） control circuit.The charge amplifier can realize program control of magnification and sensitivity.Experiment verification shows the charge amplifier has strong point of high-bandwidth,steady performance,good coherence,and can satisfy the needs of actual engineering application.
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