Pressure sensor

Details Pressure sensor Pressure sensor

1988-10-12

1990-03-06

Woodiel, Donald G.

Measuring and testing

Fluid pressure gauge

Electrical

73722, 73728, 338 32H, G01L 914

Patent

active

049055208

ABSTRACT:
The pressure sensor has a mechanical pressure receiving member and a mechanical-electrical transducer connected to it. The transducer comprises a permanent magnet attached with a moving portion of the pressure receiving member which cooperates with a locally fixed Hall-effect sensor mounted on the housing. To linearize the characteristic response curve of the transducer the inner surface of the housing wall is shaped like a funnel in a region between the permenent magnet and the Hall-effect sensor and in the vicinity of the permanent magnet. Because of this geometry the field strength lines are bunched increasingly on increasing separation of the permanent magnet from the Hall-effect sensor so that the field strength at the Hall-effect sensor increases and/or decreases approximately linearly with displacement path of the magnet.

REFERENCES:
patent: 4667514 (1987-05-01), Baer
Hallgeneratoren und Feldplatten, Ing.(grad.) Wilhelm Teichmann, Dr. Wolfgang Flossmann, Bauelemente, Elektronik, 9/6.5.1983, Sondertell, pp. 107-112.

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