Sensor arrangement for the contactless sensing of angles of rotation on a rotating part

A sensor assembly, a technology for detecting rotation, which is used in converting sensor output, using electromagnetic/magnetic devices to transmit the direction of sensing components, instruments, etc., can solve the problem that the evaluation of the coupling coefficient requires expensive electronic equipment, etc. flexible effects

Active Publication Date: 2017-05-31
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Evaluation of the coupling coefficient requires expensive electronics

Method used

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  • Sensor arrangement for the contactless sensing of angles of rotation on a rotating part
  • Sensor arrangement for the contactless sensing of angles of rotation on a rotating part
  • Sensor arrangement for the contactless sensing of angles of rotation on a rotating part

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Embodiment Construction

[0016] as by figure 1 and figure 2 As can be seen, the illustrated embodiment of the sensor assembly 1 according to the invention for the contactless detection of the angle of rotation of a rotary component comprises a target 20 coupled to the rotary component, which has an annular disk-shaped base body 22 , the base body has at least one metal surface 24 ; and a coil assembly 40 with at least one planar detection coil 42 , 44 , 46 arranged on a circular circuit board 30 . Obviously, the circuit board 30 does not have to be circular, and the circuit board 30 can also have other suitable shapes. The target object 20 combines with the coil assembly 40 to generate at least one kind of information for determining the current rotation angle of the rotating component. According to the invention, at least one measuring circuit 3 converts the inductance L of the corresponding planar search coil 42 , 44 , 46 into a measuring signal U M The inductance changes due to the eddy current...

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Abstract

The invention relates to a sensor arrangement (1) for the contactless sensing of angles of rotation on a rotating part, said rotating part being coupled to a disk-shaped target (20) which includes at least one metal area (24) and generates, in combination with a coil arrangement (40) comprising at least one flat detection coil (42, 44, 46), at least one piece of information to determine the current angle of rotation of the rotating part. According to the invention, at least one measurement circuit (3) converts the inductance of a corresponding flat detection coil (42, 44, 46) into a measurement signal (UM) which an evaluation and control unit (10) acquires using measurement technology and evaluates in order to calculate the angle of rotation, the inductance of the detection coil (42, 44, 46) changing under the effect of eddy currents in accordance with the degree of overlap between the detection coil and the at least one metal area (24) of the rotating target (20).

Description

technical field [0001] The invention relates to a sensor assembly of the type according to independent claim 1 for the contactless detection of an angle of rotation. Background technique [0002] The measurement of the angle of rotation of the rotating member is usually achieved by using a magnetic sensor. Here, the rotating component to be measured is equipped with a permanent magnet. Corresponding magnetic field sensors, which can be integrated, for example, in an integrated circuit, measure the field strength in two or three spatial directions and deduce the angular directions. [0003] Furthermore, 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. [0004] Document DE 197 38 836 A1 discloses, for example, an inductive an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/20
CPCG01D5/2013G01D5/202G01D5/2026
Inventor S·莱迪希J·奥伯莱恩德O·克勒尔
Owner ROBERT BOSCH GMBH
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