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:
Jan. 09, 1996
Filed:
Apr. 10, 1995
Jacques C Kools, Eindhoven, NL;
Josef P Naus, Eindhoven, NL;
Wiepke Folkerts, Eindhoven, NL;
Martinus A Gijs, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
A device for determining the orientation of a vehicle includes a magnetic field sensor (3) which is arranged in the vicinity of a ferromagnetic outer wall of the body of the vehicle and which is rigidly connected to the wall. External magnetic fields could unpredictably magnetize the wall portion (1) of the body, in the vicinity of which the magnetic field sensor (3) is provided, so that the measurements would become inaccurate. In order to achieve a substantial reduction of these adverse effects of external magnetic fields, the relevant wall portion is magnetically stabilized, preferably by including it in a magnetic circuit which also includes at least a magnet (11; 23, 27). The magnetic circuit preferably comprises also a yoke (23, 25) which has an approximately U-shaped cross-section and which is made of a soft magnetic material, the free ends of limbs (25) of the yoke facing the relevant wall portion (1) and the yoke being at least partly enclosed by an electric coil (27) in order to form an electromagnet.