Patent · US Expired

Accelerometer with reduced extraneous vibrations owing to improved return movement

US7552638B2 · kind B2 · utility

4Cited by
5References
14Claims
0Family size

Assignee

Inventors

Key dates

Filing dateAug 11, 2004
Grant dateJun 30, 2009
Priority date—
Expiry dateAug 15, 2024

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG01P15/125
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

An accelerometer uses variations in capacitance to detect and measure the movement of a moving mass in relation to a fixed part. The accelerometer comprises a first series of electrodes, which are solidly connected to the mass and which are interdigitated with a second series of electrodes. The second series of electrodes are solidly connected to the fixed part. The accelerometer further comprises an electronic circuit which: detects the variation in at least one capacitance between the moving mass and the fixed part, in the form of a moving mass displacement indicator; and also generates an electrostatic stress in order to return the moving mass to the initial position thereof.

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