Title: Experimental device for measuring solid audio frequency sound velocity
Application Number: 200510060543 Application Date: 2005.08.29
Publication Number: 1731111 Publication Date: 2006.02.08
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: G01H5/00,G09B23/14
Applicant(s) Name: Zhejiang University Address: 310027
Inventor(s) Name: Zhou Xiaofeng, Bao Desong
Attorney & Agent: sheng huide
Abstract:
     The invention relates to a solid audio frequency sound speed testing experimental device, which is formed by a solid bar, a brace, a piezoelectric transducer, a change-over switch set, a testing box and a moving testing clip. It is characterized in that the piezoelectric transducers are separately fixed on the two ends of the solid bar of the brace; when one of the change-over switch set presses the measuring key, the single chip microcomputer generates a single impulse and opens the timer; the single impulse uses the photocoupler to drive the piezoelectric transducer on one end of the solid bar to generate the sound frequency vibration, then the sound frequency vibration is transited to the piezoelectric transducer on the other end by the solid bar to generate the voltage, which is amplified, shaping pulsed and sent to the single chip microcomputer by the photocoupler which can stop the timer and display the transiting time of the sound frequency vibration on timer display. The change-over switch set can change-over various material solid bars to do measuring.
Time: 11
<- Previous Patent:Sensor node for impact detection   |  Next Patent:Ultrasonic power measuring device ->