Magnetic field position sensor and method of use

Details Magnetic field position sensor and method of use Magnetic field position sensor and method of use

2005-11-16

2009-08-04

LeDynh, Bot (Department: 2862)

Electricity: measuring and testing

Conductor identification or location

Inaccessible

C324S228000

Reexamination Certificate

active

07570041

ABSTRACT:
A magnetic field position sensing device for sensing the position, on a front surface of a wall, of a magnet of known magnetic field intensity secured to a rear surface of the wall. The sensing device has a magnetic field transducer which produces signals proportional to the strength of the magnetic field detected. These signals are treated in a microcontroller and compared to a reference signal value representative of the magnetic field intensity of the magnet, when not obstructed, whereby to generate signals to a display device which displays a numerical value indicative of the thickness of the wall. Audible/visual signaling devices are also provided whereby to direct the movement of the sensing device by a user person to locate same on the front surface of the wall substantially adjacent the magnet and this is accomplished by displacing the sensing device in a diminishing spiral path.

REFERENCES:
patent: 1971189 (1934-08-01), Leibing
patent: 3836848 (1974-09-01), Blevins
patent: 4998058 (1991-03-01), Tofte et al.
patent: 5434500 (1995-07-01), Hauck et al.
patent: 6927560 (2005-08-01), Pedigo et al.

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