摘要
本文根据karman旋涡的理论研制了超声旋涡流量计,它由超声发射器、超声旋涡传感器、超声接受器、检波器、放大器和Schmitt触发器等部分组成,其输出是方波信号。该流量计可以测量13.8~2463.0ml/s的双向气体流量,最大流量时的压力损失不大于1.6kPa,,适用于呼吸通气功能的测定与监护。
The development of an ultrasound vottex flowmeter is carried out on the basis of var Karman vortex theory with ultrasound wave measuring vortex shedding frequence(VSF).It is composed of ultrasound transmitter,ultrasound vortex sensor,ultrasound receiver,detector,amplifier,and Schmitt flipflop.There is an output with square wave from the meter,whose frequency is just VSF.The flowmeter can measure double direction of gas.Its range is 13.8-2463.0ml/s,and peressure loss is 1.6KPa when the flow has reached maximum value.It can be used to measure and to monitor the respiratory function of human or animal.
出处
《中国医疗器械杂志》
CAS
1994年第4期195-198,共4页
Chinese Journal of Medical Instrumentation
关键词
流量计
呼吸测量
超声波
Ultrasound vortex flowmeter,Respiratoty measurement