公开(公告)号：US4869097A

公开(公告)日：1989-09-26

申请号：US171980

申请日：1988-03-23

申请人： Bernhard R. Tittmann ,  John M. Richardson ,  James R. Bulau ,  Lawrence R. Bivins

发明人： Bernhard R. Tittmann ,  John M. Richardson ,  James R. Bulau ,  Lawrence R. Bivins

IPC分类号： G01L11/04

CPC分类号： G01L11/04

摘要： A method and an apparatus are provided for measuring the pressure of a gas within a sealed vessel. A sonic transducer is used to apply an oscillating force to the surface of the vessel. The frequency of the ultrasonic wave is swept through a range which causes resonant vibration of the gas in the vessel. A receiving transducer measures the amplitude of the resultant vibration at the vessel surface and reveals the resonant frequency of the gas as peaks in the amplitude of the sweep. The resonant frequency obtained depends upon the composition of the gas, its pressure and temperature, and the shape of the confining vessel. These relationships can be predetermined empirically so that the pressure inside the vessel can be calculated when the composition of the gas, its temperature, and shape of the confining vessel are known. The output of the receiver is fed into a computer which is programmed to calculate the pressure based upon these predetermined relationships which are stored in the computer.

摘要翻译： 提供了一种用于测量密封容器内的气体的压力的方法和装置。 使用声音换能器将振荡力施加到容器的表面。 超声波的频率被扫过引起容器中的气体的共振振动的范围。 接收传感器测量在容器表面处产生的振动的振幅，并将气体的共振频率显示为扫描振幅的峰值。 获得的共振频率取决于气体的组成，其压力和温度以及限制容器的形状。 这些关系可以经验地确定，使得当气体的组成，其温度和限制容器的形状是已知的时，可以计算容器内的压力。 接收机的输出被馈送到计算机中，该计算机被编程为基于存储在计算机中的这些预定关系来计算压力。