Motion sensor unit

Communications: electrical – Condition responsive indicating system – With particular system function

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340 52H, 340 61, 340665, 340671, 340683, 340686, 340689, 340 65, 200 6145R, 200 6152, 200 52A, G08B 1900, H01H 3502

Patent

active

046849289

ABSTRACT:
A motion sensor unit which includes a sensor assembly for monitoring whether or not the inclination of a mobile member is in excess of a predetermined reference angle and outputting a pulse signal in case the inclination is greater than the reference angle; a detector for monitoring whether or not the duration of the pulse signal is in excess of a predetermined reference time and, in the case of any excess, outputtting a signal representing that the inclination of the mobile member is greater than the reference angle and is continuous for more than the reference time; a sensor assembly for outputting a pulse signal inverted in accordance with the value of a shock given to the mobile member; and a detector for monitoring whether or not the cycle of the pulse signal is shorter than a predetermined reference time and outputting a shock detection signal when the cycle is shorter than the reference time. Due to the above constitution, the motion sensor unit is capable of controlling the shock detection sensitivity continuously and independently without altering the detection sensitivity for any jolt or inclination.

REFERENCES:
patent: 3455149 (1969-07-01), Foster et al.
patent: 3930248 (1975-12-01), Keller
patent: 3979739 (1976-09-01), Birchall
patent: 4253095 (1981-02-01), Schwarz et al.
patent: 4359717 (1982-11-01), Huber et al.
patent: 4378693 (1983-04-01), Ratcliffe
patent: 4414541 (1983-11-01), Ho

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