Measuring and testing – Speed – velocity – or acceleration – Acceleration determination utilizing inertial element
Patent
1995-06-08
1997-07-08
Oda, Christine K.
Measuring and testing
Speed, velocity, or acceleration
Acceleration determination utilizing inertial element
7351435, G01P 1508
Patent
active
056463499
ABSTRACT:
A floating mass accelerometer having at least one elastic member contacting a mass that is supported by a low friction surface is disclosed. At least one proximity sensor is located adjacent the mass and provide an output based upon the distance between the sensor and the mass as regulated by the degree of elastic member flexion. Acceleration forces acting upon the mass cause the mass to move in response thereto, thereby causing deflection of the at least one elastic member. The change in distance between the mass and the at least one proximity sensor is relayed to a digital signal processor which processes the acceleration information and sends this information to a display and/or memory unit. In a preferred embodiment, a two axis accelerometer is disclosed wherein acceleration values greater than a predetermined level are stored in memory and may be recalled later to provide an indication as to acceleration forces encountered by the device. Alternative embodiments provide for an pre-impact monitor wherein a buffer holds acceleration information for the last time period; a shipping monitor wherein acceleration forces are time-tagged for later retrieval; a seismic monitor with an optional output relay capable of remote operations.
REFERENCES:
patent: 3789674 (1974-02-01), Anderson
patent: 4083254 (1978-04-01), Nissl
patent: 4226120 (1980-10-01), Nissal
patent: 4819486 (1989-04-01), Kunkel
patent: 4822999 (1989-04-01), Parr
patent: 5063781 (1991-11-01), Conforti
Spengler Jeffrey Curtin
Twigg Robert David
Evans Stephen M.
Oda Christine K.
Plan B Enterprises, Inc.
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