Optical motion sensor and method for operating same

Details Optical motion sensor and method for operating same Optical motion sensor and method for operating same

1994-03-16

1995-11-21

Swann, Glen

Communications: electrical

Condition responsive indicating system

Specific condition

340429, 340545, G08B 1308

Patent

active

054691419

ABSTRACT:
A motion sensor for use with a security system provides an output signal to initiate an alarm whenever a significant level of movement is detected by the motion sensor. A light emitter directs light through an optical path onto a light detector, which generates an electrical output signal in response to the light directed onto it. A resiliently supported mass is coupled to the optical path to modify the optical path in response to motion imposed upon the mass, thereby reducing the transmission of light in the optical path and affecting the electrical signal as the mass moves. The motion sensor of the present invention is responsive to movement in all directions, and, since it is optical in nature, is immune to the presence of magnetic fields.

REFERENCES:
patent: 4247847 (1981-01-01), Gontowski, Jr.
patent: 4584569 (1986-04-01), Lopez et al.
patent: 4683753 (1987-08-01), Nelsen et al.

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