Sensor unit, method for producing sensor unit and instrumented bearing comprising such sensor unit

• Main Authors: NIARFEIX FRANCOIS, VAN AMERONGEN GERTJAN
• Format: Patent
• Language: Chinese; English
• Published: 01.01.2014
• Subjects: ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS; BEARINGS; BLASTING; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; ELEMENTS OR CRANKSHAFT MECHANISMS; ENGINEERING ELEMENTS AND UNITS; FLEXIBLE SHAFTS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT; LIGHTING; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS; MEASURING; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS; MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS; MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION,OR SHOCK; MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR; MECHANICAL ENGINEERING; PHYSICS; PRINTED CIRCUITS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; SHAFTS; TARIFF METERING APPARATUS; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TESTING; THERMAL INSULATION IN GENERAL; WEAPONS

This method of the present invention is for producing a sensor unit (6) for sensing the angular position of a rotatable element (42) with respect to a fixed element (44). The sensor unit (6) comprises an encoder element (62) which is fastened with the rotatable element (42) and is adapted to generate magnetic field variations as a function of its angular position; and a sensing element (640) which is fastened with the fixed element (44) and is adapted to sense the magnetic field variations. The sensing element (640) is mounted on and connected to a printed circuit board (642) mounted in a shielding casing (66) which is fastened with the fixed element (44). This method comprises a step consisting in earthing the shielding casing (66) by electrically connecting it to a load discharging device of the printed circuit board (642).