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Method and device for determining a rotational frequency of a wheel

A technology of rotating frequency and rotating wheel, which is applied in the direction of measuring device, brake, and conversion sensor output, etc., can solve the problems of sinusoidal modeling time difference influence, etc., and achieve simple and fast determination effect

Pending Publication Date: 2021-08-06
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, in terms of production technology, the rotary wheel can have an eccentricity, whereby a division error of the sinusoidal modeling can have an effect on the time difference between the detected sides

Method used

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  • Method and device for determining a rotational frequency of a wheel
  • Method and device for determining a rotational frequency of a wheel
  • Method and device for determining a rotational frequency of a wheel

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Embodiment Construction

[0018] figure 1 A rotational speed sensor 1 for a motor vehicle is shown in a simplified illustration. The rotational speed sensor 1 has a rotary wheel 2 to which a sensor element 3 is assigned. In this case, the sensor element 3 is assigned radially to the outer circumference of the rotary wheel 2 and is arranged fixedly on the housing. The rotary wheel 2 is coupled in a rotationally fixed manner to a shaft, for example to the shaft of a drive wheel of a motor vehicle. The rotary wheel 2 has a plurality of pulse generators 4 distributed over its circumference and arranged evenly spaced from one another. In this exemplary embodiment, the pulse generator is designed as a radially protruding ring segment or tooth, which is delimited in the circumferential direction by two side faces 5 . Alternatively, the pulse generator 4 is designed, for example, as poles, axial teeth and / or orifice plates of a multistage magnetic wheel. The rotary wheel 2 is here a pole wheel, which has a...

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PUM

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Abstract

The invention relates to a method for determining a rotational frequency of a wheel, in particular of a motor vehicle, having a rate of rotation sensor (1) that has a rotary sensor (2) assigned to the wheel and a sensor element (3) assigned to the rotary sensor (2), wherein the rotary sensor (2) has pulse generators (4) that are arranged in a manner distributed over its circumference and spaced evenly from one another and whose edges (5) are recorded by the sensor element (3) so as to determine the rotational frequency of the rotary sensor (2). There is provision to use an optimal filter in order to compensate a modulation caused by an eccentricity, and to adapt modulation parameters of the optimal filter through a sequential least-squares method. A time-equidistant frequency signal is subjected to short-term averaging, for example using a PT1 filter, and the modulation is modelled as sinusoidal interference and compensated.

Description

technical field [0001] The invention relates to a method for determining the rotational frequency of a wheel, in particular a motor vehicle, provided with a rotational speed sensor having a rotating wheel (Geberrad) assigned to the wheel and a sensor element assigned to the rotating wheel, wherein the rotating wheel There are pulse generators distributed at its circumference at an even distance from one another, the sides of which pulse generators are detected by sensor elements in order to determine the rotational frequency of the rotary wheel. [0002] The invention also relates to a device having a controller which, when used as intended, carries out the method described above. Background technique [0003] In a safety braking system in a motor vehicle, the rotational speed or rotational frequency of one or more wheels of the motor vehicle is monitored in order, for example, to detect and prevent locking of the wheels or the like. In the controller of an ABS or ESP syste...

Claims

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Application Information

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IPC IPC(8): G01P3/489G01P21/02
CPCG01P3/489G01P21/02G01P3/4805G01P3/481G01D5/244B60T8/1725B60W2520/28
Inventor J·朔因
Owner ROBERT BOSCH GMBH
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