基于内压式点滴速度传感器的设计

摘要

The drop method is widespread used in liquid micro-flow detection and control. The liquid micro-flow detection is a difficult point for research all the time. For this reason, a drop speed sensor is designed using a medical transfer line, a pressure sensor, and an instrumentation amplifier. The pressure sensor is used for measuring the pressure of the bottle which is attached to the medical transfer line for stock solution and then turns the pressure into a voltage, which could be converted into drop speed. The sensor hardware is designed and manufactured,and the experiments are conducted,so as to acquire the equation of the drop speed sensor.%点滴法在液体微流量检测与控制方面的应用普遍,液体微流量的检测一直是研究的难点.利用医用输液管储液瓶、压力传感器和仪表放大器设计一种点滴速度检测传感器,用压力传感器检测储液瓶内的压力并转换为电压输出,通过测量电压后换算为点滴速度.设计并制作了传感器硬件,并进行实验测试,获得传感器点滴速度关系表达式.