Sensor system

Details Sensor system Sensor system

1992-06-29

1994-09-06

Chilcot, Jr., Richard E.

Measuring and testing

Specimen stress or strain, or testing by stress or strain...

Threaded fastener stress

7386269, 73DIG2, G01L 100

Patent

active

053437594

ABSTRACT:
The invention relates to a sensor system for measuring e.g. the preloads in screws, bolts or similar. It comprises sensor means (2) comprising a magnetoelastic material (6) sensitive to the preloads to which the object is exposed and a sensing device (3) comprising a contact portion (4) and gripping portion (5). The contact portion is so arranged that it at least partly surrounds the sensor means (2) and the magnetoelastic material (6) is excited with an excitation frequency of at least 300 kHz.

REFERENCES:
patent: 3969810 (1976-07-01), Pagano
patent: 4106370 (1978-08-01), Kraus et al.
patent: 4279163 (1981-07-01), Takekoshi et al.
patent: 4760745 (1988-08-01), Garshelis
patent: 4823620 (1989-04-01), Edo et al.
patent: 4986137 (1991-01-01), Sato et al.
patent: 5142919 (1992-09-01), Satoh et al.
patent: 5154084 (1992-10-01), Sonderegger et al.
patent: 5280725 (1994-01-01), Stengel

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