公开(公告)号：US4600855A

公开(公告)日：1986-07-15

申请号：US739188

申请日：1985-05-30

Applicant: J. Scott Strachan

Inventor： J. Scott Strachan

IPC: H01L41/08 ,  G01L1/16

CPC classification number: G01L1/162 ,  Y10S310/80

Abstract: An apparatus for measuring pressure within a conduit is disclosed preferably comprising a tube whose resonant frequency varies with the pressure of fluid within the tube; means for passing the fluid to be measured through the tube; two active piezoelectric films disposed in intimate contact with the tube on opposite sides thereof; first electronic means for energizing the first of the films to cause the tube to resonate at its natural frequency, and second electronic means connected to the other of the films to monitor the frequency of the tube.

Abstract translation: 公开了一种用于测量导管内的压力的装置，其优选地包括其谐振频率随着管内的流体的压力而变化的管; 用于使待测流体通过管的装置; 两个有效的压电薄膜在其相对侧与管子紧密接触地设置; 第一电子装置，用于激励第一薄膜以引起管以其固有频率谐振;以及第二电子装置，连接到另一个薄膜以监测管的频率。