Operation of inductive distance sensor by scaling output signal

Details Operation of inductive distance sensor by scaling output signal Operation of inductive distance sensor by scaling output signal

1992-04-22

1994-02-01

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Displacement

32420724, 32420712, G01B 714

Patent

active

052835197

ABSTRACT:
A method of operating an induction distance sensor employs a sensor having a vane or tongue of magnetic material disposed movably between two inductive coils for changing their inductances in the opposite sense upon movement of the tongue. With respect to sensor signals U.sub.s and U.sub.e, the method employs the portion U.sub.sL of U.sub.s which is in phase with the imaginary part U.sub.eL of U.sub.e. Furthermore, the value U.sub.sL measured in this way is to be further increased by U.sub.e /U.sub.eL in order to compensate for the temperature influences on the ohmic resistances. Furthermore, the errors which can be caused by erroneous controls U.sub.e1 and U.sub.e2 are also corrected. For this purpose, the total voltage is applied at intervals to a reference sensor which consists of a precision resistance divider. In this way, the exact middle point M of the total voltage U.sub.e =U.sub.e1 and U.sub.e2 can be determined by measurement, and the middle-point voltage U.sub.m with respect to zero potential determined, which is divided into the real part U.sub. MR which is in phase with U.sub.e and the imaginary part U.sub.ML which lags behind it by 90.degree.. With the phase angle .alpha. between U.sub.eR and U.sub.eL, the correction value is

REFERENCES:
patent: 3491289 (1970-01-01), Petrini
patent: 3684961 (1972-08-01), Muir
patent: 3721821 (1973-03-01), Blanyer
patent: 3855525 (1974-12-01), Bernin
patent: 3961243 (1976-06-01), Schulz
patent: 3997835 (1976-12-01), Ando et al.
patent: 4269070 (1981-05-01), Nelson et al.
patent: 4349746 (1982-09-01), Grossner et al.
patent: 4771238 (1988-09-01), Caruso et al.
patent: 4812757 (1989-03-01), Meins et al.
patent: 4855675 (1989-08-01), Russell et al.
patent: 4967154 (1990-10-01), Marantette
patent: 5015948 (1991-05-01), Tew
patent: 5045786 (1991-09-01), Fischer
Patent Abstracts of Japan, vol. 8, No. 68 (P-264) (1505) Mar. 30, 1984 and JP-A-58214825 Dec. 14, 1983.

Affiliated with

Also associated with

Rating

Operation of inductive distance sensor by scaling output signal does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Operation of inductive distance sensor by scaling output signal , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Operation of inductive distance sensor by scaling output signal will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-582052