Vibration sensor for an automotive vehicle

Details Vibration sensor for an automotive vehicle Vibration sensor for an automotive vehicle

1980-10-30

1983-02-15

Gill, James J.

Measuring and testing

Engine detonation

Combustion signal compared to reference signal varied by a...

310329, 73651, G01L 2322

Patent

active

043733786

ABSTRACT:
A vibration sensor for an automotive vehicle having a multi-peak vibration characteristic of wider responsiveness and of a higher S/N ratio. The vibration sensor comprises a plurality of piezoelectric vibrators so arranged that the piezoelectric voltage signals from the vibrators are synthesized in reverse polarity between two elements having two adjacent resonant frequencies, when the element are deformed in the same direction. Therefore, the voltages are synthesized in the same polarity, when engine knocking frequency lies between two adjacent sensor resonant frequencies, because a vibrator is 180 degrees out of phase with another adjacent vibrator.

REFERENCES:
patent: 2722614 (1955-11-01), Fryklund
patent: 4254354 (1981-03-01), Keem

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