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Device for contactless determination of rotation and/or position of an object having an encoder

An encoder and generator technology, applied in the field of speed and/or position devices, can solve problems such as unsatisfactory symmetry characteristics

Active Publication Date: 2010-03-17
CARL FREUDENBERG KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The symmetry properties achievable by the device are unsatisfactory

Method used

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  • Device for contactless determination of rotation and/or position of an object having an encoder
  • Device for contactless determination of rotation and/or position of an object having an encoder
  • Device for contactless determination of rotation and/or position of an object having an encoder

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Embodiment Construction

[0013] Individual parts of the device are not shown in the figures, since these are known per se and are also known from the US publications mentioned at the outset which belong to the state of the art. therefore, figure 1 A detail of the surface of an encoder designed as a double-track encoder (Doppelspur encoder) 1 is shown in FIG. 1 and is oppositely magnetized with regular N poles 2 and S poles 3 . A corresponding number of poles 2 and 3 are arranged on each encoder track 4 and 5 . The number of poles 2 and 3 is determined by a predetermined division angle, which is generally between 3° and 12° for regular poles 2 and 3 . For each regular pole 2 and 3, the pole width or angular length 14 is the same size. In addition to the regular poles 2 and 3, irregular poles 6 and 7 with a large angular length 13 (pole width) are arranged on each encoder rail 4 and 5, said irregular poles are also reversed to each other magnetized. The dual-rail encoder 1 is assigned a differential...

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Abstract

The present invention relates to a device which is used for measuring the rotary speed and / or position of the generator component which can rotate around the axial cord without contact, the device isprovided with a circular permanent-magnet encoder which includes a N pole and a S pole which are alternately arranged in the circumference direction and at least two different pole width, the encoderis provided with a scanning head with difference hall transducer, wherein, the encoder is designed to be a double rail encoder (1) with inverse magnetizations; and each sensor element (9, 10) of the difference hall transducer (8) is arranged to one of the encoder rails (4, 5).

Description

technical field [0001] The invention relates to a device for contactless detection of rotational speed and / or position of an axis-rotatable generator part (Geberteil), which device has an annular permanent-magnetic encoder with Alternately arranged regular N and S poles and at least one irregular pole, the encoder also has a scanning head with differential Hall sensors. Background technique [0002] Devices of this type are used in many ways to detect the rotational speed of a shaft and also to measure the position of the shaft. The encoder is attached to the generator part and the scanning head supplies corresponding signals from which rotational speed or position information can be derived. [0003] A device is known from US 2003 / 0116703 A1 in which an encoder is equipped with alternating regular N and S poles and which is provided with a scanning head with differential Hall sensors. In order to be able to determine the position, the encoder has at least one inhomogeneit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01P3/481G01D5/245
CPCG01P3/487F02D41/0097F02D41/009G01D5/2457G01D5/145
Inventor C·冈德R·海因里希M·冯盖绍H·穆特尔L·萨拉尼亚克R·莱茵斯
Owner CARL FREUDENBERG KG
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