Vibration sensing device having slidable conductive member

Details Vibration sensing device having slidable conductive member Vibration sensing device having slidable conductive member

1997-06-26

1999-04-20

Williams, Hezron

Measuring and testing

Engine detonation

Specific type of detonation sensor

73651, 310329, G01L 2300

Patent

active

058958401

ABSTRACT:
In a vibration sensing device for sensing a knocking vibration of an engine, a piezoelectric element is connected to an output terminal through a resilient conductive member. The resilient conductive member has a fixed base part, a sliding part at a position opposite to the fixed base part, and an intermediate V-shaped part resiliently contacting the piezoelectric element. When the sliding part moves slidingly in response to vibration of the piezoelectric element, the sliding friction force which exerts on the sliding part increases the spring constant of the resilient conductive member to be larger than the stationary spring constant of the same by hysteresis characteristics, thereby reducing damage to the piezoelectric element and enhancing reliability of the electric connection.

REFERENCES:
patent: 4225802 (1980-09-01), Suzuk et al.
patent: 4254354 (1981-03-01), Keem
patent: 4393688 (1983-07-01), Johnston et al.

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