Transducer for detecting pressure changes in pipes

Details Transducer for detecting pressure changes in pipes Transducer for detecting pressure changes in pipes

1990-01-31

1991-07-16

Woodiel, Donald O.

Measuring and testing

Fluid pressure gauge

Diaphragm

73119A, G01L 908

Patent

active

050314602

ABSTRACT:
A transducer for detecting pressure changes in pipes by detecting deformation of the pipes and for converting the pressure changes in the pipes into electric signals includes a piezoelectric element having a bimorph structure as a sensor element. The piezoelectric element is constructed in such a way that an intermediate layer is interposed between two piezoelectic pieces. The element is pressed against the pipe surface by a holder which is sufficiently elastic to allow opposite ends of the piezoelectric element in the circumferential direction of the pipe to elastically abut against the pipe periphery. Thereby the ends of the piezoelectric element can be pressed in tight contact against the outer surfaces of pipes having various diameters, and the internal pressure of the pipes can be detected reliably.

REFERENCES:
patent: 4541284 (1985-09-01), Guagliumi et al.
patent: 4807479 (1989-02-01), Sako et al.

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