RESOLUTION INCREASE IN THE ROTATIONAL SPEED SIGNAL BETWEEN ROTATIONAL SPEED PULSES

WIPO Patent Application WO/2016/023769

A3

The invention relates to a method for producing sensor information (71), which depends on a rotational speed (12), using a rotational speed sensor (12) which is adapted to output rotational speed pulses (50) in predetermined angular positions (51) of a physical sensor field (30, 32) 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.

WO/2014/120464	METHODS AND SYSTEMS FOR CONDITIONING SIGNALS FROM A SPEED SENSOR
JP2007121216	ROTATION STATE DETECTOR

JÖCKEL WOLFGANG (DE)
DIETZ TIMO (DE)
SCHMID BERNHARD (DE)
HILSER ROLAND (DE)

PCT/EP2015/067606

May 26, 2016

July 30, 2015

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CONTINENTAL TEVES AG & CO OHG (DE)

G01P3/489; G01D5/245; G01P3/44

EP0059244A2	1982-09-08
DE19548385A1	1997-07-03
US20130035896A1	2013-02-07
FR2861458A1	2005-04-29
US5299143A	1994-03-29
US4628314A	1986-12-09
US5019773A	1991-05-28

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