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:
Mar. 10, 1987
Filed:
Apr. 23, 1984
Gerald Ulbrich, Hanover, DE;
Detlev Neuhaus, Langenhagen, DE;
WABCO Westinghouse Fahrzeugbremsen GmbH, Hanover, DE;
Abstract
An arrangement for determining the position of a core within a coil improves a voltage across the coil upon generation of an initiating voltage pulse. The initiating voltage pulse can originate from a microprocessor or other electrical timing logic circuit. The charging current in the coil is developed from this initiated time until either a predetermined current level is reached in one embodiment or a predetermined time duration is reached in another embodiment. A microprocessor or other electrical measuring circuit measures either the time duration to reach the predetermined current level or the discharge time following current charging for the predetermined time duration. A microprocessor or other electrical logic circuit derives the core position from the measured time to reach the predetermined current level or the measured discharge time following current charging for the predetermined time duration. A switching element interrupts the charging of the coil before the current can reach a peak level, such timing measurement thereby occurring during the approximately linear portion of the inductive current charging curve.