Ultrasonic sensor and obstruction detector having accurate obstr

Details Ultrasonic sensor and obstruction detector having accurate obstr Ultrasonic sensor and obstruction detector having accurate obstr

1997-10-14

2000-07-11

Williams, Hezron

Measuring and testing

Vibration

By mechanical waves

73598, 734321, 367 99, 367909, G01N 2924

Patent

active

060855924

ABSTRACT:
A short ring is mounted onto a back part of a housing of an ultrasonic sensor so that the short ring is coaxial with the housing. The width of the short ring along the axial direction of the housing is set such that it shields the back part of the housing including a transformer of a processor. The short ring is made up of an excellent metal conductor and is coaxial with the coils of the transformer.

REFERENCES:
patent: 3935484 (1976-01-01), Leschek et al.
patent: 4326273 (1982-04-01), Vancha
patent: 4701893 (1987-10-01), Muller et al.
patent: 4796726 (1989-01-01), Kobayashi et al.
patent: 4803670 (1989-02-01), Chen
patent: 4918672 (1990-04-01), Iwabuchi et al.
patent: 4994800 (1991-02-01), Milliken
patent: 5495765 (1996-03-01), Dykes et al.

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