Absolute value transmitter acting as a rotation transmitter for registration of a steering angle of a motor vehicle

US6226569A · kind A · utility

Assignee

• TRW Automotive Electronics and Components GmbH · DE

Inventors

• Cornelius Peter · Ansbach, DE
• Wolfgang Huber · Tittmoning, DE
• Trevor Stewart · Oak Park, US
• Zdenek Pavlis · Singen, DE
• Danilo Caratto · Torino, IT

Key dates

• Filing date: Oct 20, 1999
• Grant date: May 1, 2001
• Expiry date: Oct 20, 2019

Classification

• Technology area (CPC G): Physics
• CPC primary: G01D5/34776
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A rotary transmitter for registration of the steering angle of a motor vehicle, with a transmitter component (49) on which is provided a coding (51) of a predetermined number n of locally sequentially digital words (W.sub.i) with a width of m bits (b.sub.1, b.sub.2, . . , B.sub.m) in m adjacent to each other tracks, at least one detector (55) for essentially simultaneous registration of the individual bits (b.sub.1, b.sub.2, . . . , B.sub.m) of a digital word (W.sub.i), whereby the transmitter component (49) and at least the one detector (55) are movable relative to each other, and with an evaluation unit (11) to which is conducted the signal of at least the one detector (55). The evaluation unit (11) ascertains the absolute position of the transmitter component (49) relative to at least the one detector (55), at least one time, by evaluation of a predetermined number (p) of sequentially detected digital words (W.sub.i), whereby the evaluation unit (11) assigns to a detected p-measure (W.sub.i, W.sub.i+1, . . . , W.sub.i+p-1), consisting of the predetermined number (p) of sequentially detected digital words (W.sub.i), a defined position value of the transmitter component (49) relat…