基于相干检测技术的LAPS味觉测试信号研究

摘要

As light addressable potentiometric sensor photocurrent signal is weak and easily drowned by the noise,The DDS circuit provides the reference signal,a test system based on coherent detection technology is presented.The system can improve the signal-to-noise ratio and detect the LAPS taste test signal.The experimental results show that data collected by the system is highly consistent with data collected by the standard instruments,the scheme is feasible.%针对光寻址电位传感器响应光电流信号微弱且易被噪声淹没的缺点,提出一套基于相干性检测技术并由DDS电路提供参考信号的测试系统.该系统能改善信噪比,实现了LAPS味觉测试信号的检测.实验结果表明,该系统采集到的数据与标准仪器采集到的数据具有很高的一致性,说明该方案是可行的.