Title: Vibrative powder storehouse powder position monitoring method and device
Application Number: 92112936 Application Date: 1992.11.07
Publication Number: 1086900 Publication Date: 1994.05.18
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: G01F23/26
Applicant(s) Name: Zhejiang Univ. Address: 310027
Inventor(s) Name: Zhou Junhu, Ren Youzhong
Attorney & Agent: ZHANG FAGAO
Abstract:
     The present invention discloses a kind of vibrating method and apparatus for inspecting the powder level of powder bin, which adopts an exciting signal generator circuit to send out a definite power resonant frequency basically equal to the natural frequency of the vibrating sheet, owing to the damping actions above and below the powder level to the vibrating sheet are different, the vibrating magnitudes caused to the vibrating sheet are different, the vibration is converted through the piezoelectric ceramic sticked on the vibrating sheet into electric signal which is sent to the audio signal receiving processing circuit, then the powder level of the powder bin is determined in accordance with the decreasing threshold value of the receiving signal.
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