Vibration sensor

Details Vibration sensor Vibration sensor

1993-03-12

1994-06-28

Williams, Hezron E.

Measuring and testing

Engine detonation

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

73654, 310329, G01L 2322

Patent

active

053236394

ABSTRACT:
A vibration sensor is provided in which the depth of a caulked portion of the season's case is increased so as to increase the capacity of a recess defined between this caulked portion and the cover. The volume of a potting agent filling there less can thereby be increased to improve the airtightness of the caulked portion and the reliability of the vibration detector. A vibration plate having cutouts circumferentially spaced along an outer, peripheral portion may be used in the vibration detector if the volume of the space formed on a lower side of the vibration plate is limited to about a few to ten percent of that of the space formed on the opposite terminal side. The expansion of air in the spaces caused by a thermal shock is therefore substantially equal to the expansion of air contained in the space on the terminal side alone, so that vibration sensor can maintain sufficient airtightness and can be improved in reliability.

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