具有校正功能的液面检测器设计与应用

Design and Application of Liquid Level Detector with Correction Function

为了以更低的成本和更加简单的操作方式来实现液面计量,提出了一种新的具有校正功能的液面检测器,其输出信号是脉冲流。通过设计具有比较电路和校验电路的芯片,该液面检测器只需要简单地调整参数就可以实现各种液位传感器的修正,然后使用配置范围在3.97 mm^123.34 mm之间的液位传感器,相应的输出频率范围可以达到3.12 k Hz^57.25 k Hz。最后进行了实际雨量测量实验,经过校正后,测量的最大频率误差为1.46%,验证了提出的液面检测器的正确性和精确性。

In order to realize liquid level measurement with lower cost and simpler operation mode,a new liquid level detector with the function of calibration is presented,and its output signal is pulse current. Through the design with comparison circuit and calibration circuit chip,the liquid level detector needs only simple adjustment of parameters, modification of various liquid level sensor can be realized,and then the allocation of 3.97 mm～123.34 mm in the liquid level sensor can be used. The corresponding output frequency range can reach to 3.12 kHz～57.25 kHz. Finally, the experimental results of the actual rainfall measurement show that,after the correction,the maximum frequency error of the measurement is 1.46%,the correctness and accuracy of the proposed liquid surface detector are verified.