Method and apparatus for detecting and recognizing impacts by me

Details Method and apparatus for detecting and recognizing impacts by me Method and apparatus for detecting and recognizing impacts by me

1989-05-24

1991-02-05

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

340323R, 340541, G08B 2100

Patent

active

049908979

ABSTRACT:
The present invention relates to a method and apparatus for detecting and for recognizing impacts by measuring changes in impedance. The device comprises a sensor (6) and an external electronic system (10) which permanently monitors the impedance of the sensor. After a learning period, the electronic system records the impedance of the apparatus at rest, after which, whenever the sensor is subjected to an external action (9), its impedance varies at a certain rate of change, thereby enabling the electronic system to detect the derivative of the rate of change of the impedance, or in a different application to detect the pure change in impedance, and transmit a signal to a user (16). The sensor (6) is constituted by a flexible outer surface (3) protecting two optionally flexible layers (1 and 2) of electrically conductive material which are optionally in contact with each other and which have electrical contacts (7) formed thereon and connected via electrically conductive wires (4) to the external electronic system (10).

REFERENCES:
patent: 4062008 (1977-12-01), Carlsson
patent: 4289035 (1981-09-01), Lee
patent: 4855711 (1989-08-01), Harrop et al.
8013 Journal of the Audio Engineering Society; 33 (1985), Jun., No. 6, New York, U.S.A.: J. A. M. Catrysse; pp. 430-435.

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