Patent · US Active

Sensor comprising a piezoelectric detector with compensation for ground faults

US9219430B2 · kind B2 · utility

0Cited by

4References

15Claims

0Family size

Assignee

HIDRIA AET DRUZBA ZA PROIZVODNJO VZIGNIH SISTEMOV IN ELEKTRONIKE D.O.O. · SI

Inventor

Marcel Guwang · Ramonville-Saint-Agne, FR

Key dates

Filing date	Dec 20, 2011
Grant date	Dec 22, 2015
Priority date	—
Expiry date	Dec 21, 2032

Classification

Technology area (CPC G)Physics
CPC primaryG01D3/036
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A sensor includes a piezoelectric detector (10) mounted in a support having electrically conductive walls forming a mechanical ground (MM), and an amplifier for processing the signal delivered by the piezoelectric detector, defining an electronic ground (ME) and at least a capacitive feedback loop (16). A voltage adder circuit (61) is inserted into the capacitive feedback loop in order to add an electrical voltage which varies as a function of the potential difference between the mechanical ground (MM) and the electronic ground (ME), so that the variations of this potential difference are continuously compensated for at the input (13) of the processing amplifier (12) receiving the signal delivered by the piezoelectric detector (10).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.