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Encoder device

An encoder and photodiode technology, used in measuring devices, instruments, and optical devices to transmit sensing components, etc., to reduce the effect of rising and falling beating

Inactive Publication Date: 2009-12-16
MITSUMI ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Similarly, the rising jitter also becomes large, and there is a problem that the rising and falling jitters of the output detection signal of the comparator 15 are large.

Method used

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Experimental program
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Effect test

Embodiment Construction

[0032] Embodiments of the present invention will be described below with reference to the drawings.

[0033] figure 1 (A) and (B) show a plan view and a side view of an embodiment of the encoder device of the present invention. In the same figure, the encoder device is composed of a light source 20 , a slit member 21 and an integrated circuit 22 which are not shown.

[0034] The light source 20 and the integrated circuit 22 are fixed in a separated and opposite state. The slit member 21 is free to move in the X direction (rightward or leftward) relative to the light source 20 and the integrated circuit 22 in a state inserted between the light source 20 and the integrated circuit 22 . The slit member 21 is fixed to the object to be measured, and moves in the X direction due to linear motion or rotational motion of the object to be measured.

[0035] like figure 2 As shown in the top view of , the integrated circuit 22 is provided with rhombic photodiodes 22 a , 22 b , 22 ...

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PUM

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Abstract

Objective of the invention is to provide an encoder device capable of reducing build-up and fall jitters of a detection signal. The encoder device comprises first to fourth rhomboid photodiodes (22a-22d) that are adjacent to each other in the X direction and have a length of X1 in the X direction so that the line passing through a pair of facing vertices of the rhomboid is parallel with the X direction, a slit member (21) that alternately has light transmission sections and light shielding section with a length of 2*X1 in the X direction and moves in the X direction, and logic circuits (23, 25) for generating a first detection signal from the output signals of the first to fourth photodiodes having received the light transmitted through the light transmission sections and a second detection signal of which phase is shifted from the first detection signal by the 1 / 4 period of the first detection signal.

Description

technical field [0001] The present invention relates to an encoder device, and more particularly to an encoder device that detects motion of an object to be measured and generates pulses according to the motion. Background technique [0002] An encoder device that generates pulses according to the motion of the object to be measured has been used as a device for detecting linear motion or rotational motion of the object to be measured and inputting it to a computer or the like. [0003] Image 6 (A) and (B) show a plan view and a side view of an example of a conventional encoder device. In the same figure, the encoder device is composed of a light source 10 , a slit member 11 and an integrated circuit 12 . [0004] The light source 10 and the integrated circuit 12 are fixed in a separated state facing each other. The slit member 11 is free to move in the X direction (rightward or leftward) relative to the light source 10 and the integrated circuit 12 in a state of being in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D5/36
CPCG01D5/34707G01D5/34746G01D5/34715
Inventor 三野宫秀亮胁直纯木村优子田中润一郎
Owner MITSUMI ELECTRIC CO LTD