Resolution increase in the rotational speed signal between rotational speed pulses

US11150261B2 · kind B2 · utility

Assignee

• Continental Teves AG & Co. OHG · DE

Inventors

• Wolfgang Jöckel · Gersfeld, DE
• Timo Dietz · Hochheim, DE
• Bernhard Schmid · Friedberg, DE
• Roland Hilser · Kirchheim unter Teck, DE

Key dates

• Filing date: Feb 15, 2017
• Grant date: Oct 19, 2021
• Expiry date: Nov 16, 2037

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60Y2400/3032
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for producing sensor information depends on a rotational speed, using a rotational speed sensor which is adapted to output rotational speed pulses in predetermined angular positions of a physical sensor field that rotates at the rotational speed. In order to increase resolution, a digital angle signal each is determined between the pulses. A defined number of most significant bits of said angle information is output to determine the rotational speed so that the interval between two pulses is subdivided into a defined number of subintervals. An angle value which can be unambiguously interpreted by means of the sinusoidal signal can be determined from the cosine signal by using two phase shift sinusoidal signals and an arccos function. The device optionally outputs the angle signal below a threshold value and an impulse signal above the threshold value to determine speed.