Miniature electromagnetic impact sensor

Details Miniature electromagnetic impact sensor Miniature electromagnetic impact sensor

1995-06-06

1997-04-22

Swann, Glen

Communications: electrical

Condition responsive indicating system

Specific condition

340429, 340566, 340665, 340669, G08B 1302

Patent

active

056232489

ABSTRACT:
A self-contained electromagnetic impact sensor includes a frame, a fixed permanent magnet, a fixed coil, and a metallic body elastically mounted for movement within the frame. An impact received by the sensor imparts motion to the metallic body, thereby altering the pattern of magnetic flux extending from the permanent magnet and through the coil. An electrical signal is produced within the coil, which is processed and compared to one or more threshold levels to drive one or more corresponding output triggers.

REFERENCES:
patent: 4322714 (1982-03-01), Morgan
patent: 4584569 (1986-04-01), Lopez et al.
patent: 4864288 (1989-09-01), Cross
patent: 4890265 (1989-12-01), Goldstein
patent: 4920332 (1990-04-01), Philippe
patent: 5459447 (1995-10-01), Snyder et al.
patent: 5483225 (1996-01-01), Hwang

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