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Monitor

A technology for monitoring devices and photosensitive parts, which is applied in the direction of measuring devices, electromechanical devices, and optical devices to transmit sensing components, etc., which can solve the problems of enlarged encoder size, uneconomical, and complex structures, and avoid the complexity of the structure , to avoid the effect of size expansion

Inactive Publication Date: 2005-08-10
FANUC LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, combining separately disposed displacement sensors into an optical encoder increases the size of the encoder and complicates its structure
Also, it is uneconomical

Method used

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Examples

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Embodiment Construction

[0019] figure 1 It is a cross-sectional view showing a schematic configuration of an optical encoder device to which the monitoring device of the present invention is applied.

[0020] exist figure 1 In , symbol 1 is a disk-shaped moving dial formed with a known pattern of optical codes with a light-transmitting region / non-transmitting region pattern, and the moving dial 1 is supported on a moving-dial support member 6 . The moving dial supporting member 6 is attached to a detection object (object to be detected for position or speed) such as a rotation shaft of a motor, or a part of the detection object itself constitutes the moving dial supporting member 6 .

[0021] A light source unit denoted by reference numeral 2 has one or a plurality of LEDs, and irradiates light to the moving dial 1 . The light source unit 2 emits light by an unillustrated light emission drive circuit. According to the rotational movement of the object to be detected, the light supplied from the li...

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PUM

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Abstract

The invention relates to a monitoring device used for the optical encoders detecting the position and speed of the motor driving the machine tools and industrial robots, and a monitoring device used for the motor which is additionally arranged on the optical encoder. The monitoring device has the advantages of detecting the amplitude based on the electrical signal produced by the light which is detected by the photosensitive part of the optical encoder, the displacement between the moving dial and the fixed slit forming the optical encoder (or the displacement of the moving part which is provided with the optical encoder motor) according to the monitoring result; furthermore, the load applied on the moving part of the motor with an optical encoder based on the monitoring result.

Description

technical field [0001] The present invention relates to a monitoring device for an optical encoder for detecting the position and speed of a motor driving a shaft of a machine tool or an industrial robot, and a monitoring device for a motor attached to the optical encoder. Background technique [0002] Optical encoders are widely used to detect the position and speed of servo motors that drive the axes of machine tools and industrial robots, for example. The structure of a general optical encoder is to use a moving dial to pass the coded transmitted light or reflected light through a fixed slit and receive it with a light receiving element to form an electrical signal as an output of the encoder. Although an appropriate interval is provided between the movable dial and the fixed slit, the interval may vary. For example, when an encoder is mounted on an air bearing motor and an excessive load is applied in a direction perpendicular to the position reading direction of the mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/347H02K11/00
CPCG01D5/3473
Inventor 河合知彦谷口满幸小田隆之
Owner FANUC LTD