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Sensor assembly for contactless detection of the angle of rotation of a rotating member

A technology for sensor assembly and detection of rotation, which is applied in the direction of transmission of sensing components using electric/magnetic devices, which can solve the problem that the evaluation of the coupling coefficient requires expensive electronic equipment, etc., and achieve the effect of small sensitivity

Active Publication Date: 2019-09-24
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Evaluation of the coupling coefficient requires expensive electronics

Method used

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  • Sensor assembly for contactless detection of the angle of rotation of a rotating member
  • Sensor assembly for contactless detection of the angle of rotation of a rotating member
  • Sensor assembly for contactless detection of the angle of rotation of a rotating member

Examples

Experimental program
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Effect test

no. 1 example

[0032] as by image 3 As can further be seen, the object 20A of the shown second exemplary embodiment of the sensor assembly 1A according to the invention comprises, like the first exemplary embodiment, four ring-segment-shaped metal surfaces 24A, however, each of which has a 45° Zhang Jiao. if based on Figure 9 As can be seen from the associated characteristic diagrams, the three resulting evaluation signals K1A, K2A, K3A with phase shifts have a linear progression over a wide range. Similar to the first exemplary embodiment, the evaluation and control unit 10 generates a first evaluation signal K1A by evaluating a first search coil 42 with sub-coils 42.1 and 42.2, and a second evaluation signal K1A by evaluating a second search coil 44 with sub-coils 44.1 and 44.2. The signal K2A ​​is evaluated and a third evaluation signal K3A is generated by evaluating the third search coil 46 with the sub-coils 46.1 and 46.2. In the second exemplary embodiment shown, the evaluation an...

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PUM

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Abstract

The invention relates to a sensor arrangement (1) for the contactless detection of rotational angles on a rotating component, the rotating component being coupled to a disk-shaped target (20) which has at least one metal surface (24) and which, in combination with a coil arrangement (40) which has at least one flat detection coil (42, 44, 46), generates at least one item of information for determining the current rotational angle of the rotating component. According to the invention, the at least one flat detection coil (42, 44, 46) has two coil sections (42.1, 42.2, 44.1, 44.2, 46.1, 46.2) which have opposite winding directions and are arranged opposite each other on the periphery of a circle, the at least one metal surface (24) of the rotating target (20) influencing, by eddy current effects, the inductance of the at least one flat detection coil (42, 44, 46) depending on the degree of overlap.

Description

technical field [0001] The invention relates to a sensor arrangement for the contactless detection of an angle of rotation of the type according to independent claim 1 . Background technique [0002] Various inductive rotational angle sensors are known from the prior art. In most cases, the coupling between the excitation coil and one or more sensor coils is influenced by the angular position of the coupling element (target). Evaluation of the coupling coefficient requires expensive electronics. [0003] Document DE 197 38 836 A1 discloses, for example, an inductive angle sensor with a stator element, a rotor element and an evaluation circuit. The stator element has an excitation coil, which is subjected to a periodic AC voltage, and a plurality of reception coils. Depending on its angular position relative to the stator element, the rotor element predetermines the strength of the inductive coupling between the exciter coil and the receiver coil. An evaluation circuit de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D5/20
Inventor H·艾彻勒D·伊彻尔B·巴弗欧R·阿梅林S·莱迪希J·斯特罗贝尔R·哈斯O·克勒尔
Owner ROBERT BOSCH GMBH