Accelerometer-based shock/vibration testing apparatus and associ

Details Accelerometer-based shock/vibration testing apparatus and associ Accelerometer-based shock/vibration testing apparatus and associ

1996-01-16

1997-05-20

Williams, Hezron E.

Measuring and testing

Vibration

Sensing apparatus

73489, 73491, 364566, 340669, 340683, G01D 900, G01D 1500

Patent

active

056314272

ABSTRACT:
A portable notebook computer has a shock/vibration testing system incorporated therein and including first and second memory chips and a miniature accelerometer mounted on the computer motherboard and interconnected to the power supply board and storage battery portions of the computer by a power supply switchover circuit. During operational periods of the computer the switchover circuit connects the power supply board output to the accelerometer input, and the accelerometer output to the first memory chip, so that accelerometer output data indicative of the operational shock/vibration loads borne by the computer is received and stored in the first memory chip. During non-operational periods of the computer the switchover circuit connects the storage battery output to the accelerometer input, and the accelerometer output to the second memory chip, so that accelerometer output data indicative of the non-operational shock/vibration loads borne by the computer is received and stored in the second memory chip. After a predetermined test period the operational and non-operational shock/vibration loading data stored in the two memory chips is retrieved and analyzed by suitable diagnostic software loaded in the computer.

REFERENCES:
patent: Re35269 (1996-06-01), Comerford
patent: 4745564 (1988-05-01), Tennes et al.
patent: 4821218 (1989-04-01), Potsch
patent: 4862394 (1989-08-01), Thompson et al.
patent: 5144598 (1992-09-01), Engdahl et al.
patent: 5363312 (1994-11-01), Ninomiya
patent: 5541860 (1996-07-01), Takei et al.

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