Patent ID: 9140619
Filing Date: 2015-09-22
Classification: G01L

Abstract:
1. A piezoelectric vacuum gauge, comprising: a signal generator, providing an external signal; and an actuator configured in a detecting vacuum space of the piezoelectric vacuum gauge, comprising: wherein the detecting portion, part of the actuating unit, and part of the sensor unit are all directly exposed to the detecting vacuum space; and wherein, the detecting portion is produced a first resonant motion when the signal input terminal receives the external signal, and the first resonant motion converts into a second resonant motion because the detecting portion is subject to a damping force of the detecting vacuum space as the detecting portion with the predetermined length, and a shape transformation of the sensor unit is produced to generate the detecting signals according to the second resonant motion, and the signal output terminal outputs the detecting signal to an external instrument to calculate a vacuum pressure value of the detecting vacuum space.