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Monitoring unit and method for monitoring a position signal of an incremental position measuring device

A technology of monitoring unit and measuring equipment, applied in the direction of measuring devices, using electric/magnetic devices to transmit sensing components, instruments, etc., can solve problems such as damage to position measuring equipment and difficulty in analyzing units

Active Publication Date: 2016-12-14
DR JOHANNES HEIDENHAIN GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is often difficult or even impossible for the evaluation unit to determine whether the position-measuring device is defective or whether there is practically no relative movement between the scanning unit and the incremental graduation track

Method used

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  • Monitoring unit and method for monitoring a position signal of an incremental position measuring device
  • Monitoring unit and method for monitoring a position signal of an incremental position measuring device
  • Monitoring unit and method for monitoring a position signal of an incremental position measuring device

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Embodiment Construction

[0020] figure 1 A block diagram of a position-measuring device 10 with a monitoring unit 200 according to the invention is shown. On the graduation carrier 12 there is an incremental graduation track 14 which is scanned by a scanning unit 16 . Depending on whether the position-measuring device 10 is a device for measuring linear or rotational movements, the graduation carrier 12 is designed as a scale or as a circular disk. In the first case, the scale is arranged, for example, on the first machine part and the scanning unit 16 on the second machine part. In the second case, the circular disk is generally connected to the shaft in a rotationally fixed manner and the scanning unit 16 is arranged statically therefor. During a relative movement of the first machine part with respect to the second machine part in the direction of the incremental indexing track 14 or a shaft rotation, a position signal is generated in the scanning unit 16, the analysis of which position signal al...

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Abstract

The invention relates to a monitoring unit for monitoring the position signals of an incremental position measuring device, wherein at least two position signals are applied on the input side, which are obtained from the scanning of an incremental indexing track by means of a scanning unit and are related to each other. shift. The monitoring unit comprises a signal evaluation unit and an evaluation unit, with which at least two position-related status data words can be generated from different position signals, said status data words being fed to the evaluation unit, where the evaluation unit Invalid status can be determined by comparing the status data words and an error signal can be generated in the case of the determined invalid status. The invention also relates to a method for monitoring a position signal.

Description

technical field [0001] The invention relates to a monitoring unit and a method for monitoring a position signal of an incremental position measuring device. Such a monitoring unit or such a method allows errors in the position signal to be detected already in the position-measuring device. Background technique [0002] Incremental position measuring devices are widespread, especially in the case of machine tools and in automation technology. Incremental position measuring devices are used to determine the relative position of two objects that are moving relative to each other. In principle, a distinction is made here between length-measuring devices and angle-measuring devices. Length-measuring devices are used, for example, to determine the relative position of two machine parts of a machine tool that move relative to one another. For this purpose, for example, a measuring scale (Maßverkörperung) in the form of a scale with an incremental graduation track (Inkrementaltei...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B21/02G01D5/244
Inventor I.约阿希姆斯塔勒尔T.米勒T.许尔曼
Owner DR JOHANNES HEIDENHAIN GMBH