非接触式电容传感器在静脉壶液位检测中的应用研究

Research on the Application of Non-Contact Capacitance Sensor in the Detection of Venous Pot Level

目前血液透析机中静脉壶液位检测常用的方式是超声波检测,被测液体存在气泡时会对检测结果有一定的影响。文章提出的静脉壶液位检测方式是采用非接触式电容传感器,以静脉壶液位信号检测模块和干扰信号检测模块为基础,通过电容数字转换器模块可以精确把电容信号转换成数字信号,得到持续精确的液位信号,所以采用非接触式电容传感器应用在血液透析机静脉壶液位检测中,有非常好的应用前景和使用价值。

At present,ultrasonic testing is a common method for detecting venous pot level in hemodialysis machines.When there are bubbles in the measured liquid,it will have a certain influence on the detection results.Vein pot of liquid level detection method is proposed in this paper using non-contact capacitance sensor,with intravenous pot of liquid level signal detection module and the basis of the interference signal detection module,digital converter module can accurately by capacitance converts capacitance signal into digital signal,get accurate liquid level signal,so the non-contact capacitance sensor used in the liquid level detection in venous blood dialysis machine pot,there is a very good application prospect and using value.