The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 27, 1994
Filed:
Apr. 23, 1993
Matsushita Electric Industries Co., Ltd., Osaka, JP;
Abstract
In a bridge circuit of a pressure sensor, resistances are connected in series to the impedances of a pressure detection coil and of a dummy coil for differential provided for deforming and non-deforming parts, and the values of the resistances are smaller than the impedances of the coils. The inductance and the internal resistance of the coils are measured under zero pressure and under the highest rating pressure. The resistance connected to the pressure detector coil is determined so that the sensor output sensitivity, represented as a difference of the sensor outputs under zero pressure and under the highest rating pressure, at the highest temperature agrees with that at the lowest temperature. The resistance connected to the dummy coil is determined so that the sensor output, represented as a difference of the sensor outputs under zero pressure, at the highest temperature agrees with that at the lowest temperature.