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Encoder system, signal processing method, and transmission signal generation and output device

a technology of encoder system and signal processing method, applied in the direction of material analysis, electrical/magnetically converting sensor output, instruments, etc., can solve problems such as great limitations

Active Publication Date: 2015-03-10
NIKON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0023]According to the some aspects of the present invention, it is possible to provide an encoder system and a signal processing method capable of obtaining multiple-rotation information without using an external battery.

Problems solved by technology

The external battery has to be replaced for every predetermined period mainly as a part of periodic maintenance, which is a great limitation during the maintenance.

Method used

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Examples

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Embodiment Construction

[0055]Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic block diagram showing a configuration of an encoder system according to an embodiment of the present invention.

[0056]In the present embodiment, an encoder system includes a motor 1, a power transmission device 2, a first encoder (first absolute position encoder) 3, a second encoder (second absolute position encoder) 4, an input shaft (first shaft) 10, and an output shaft (second shaft) 11. Moreover, the encoder system includes a controller 8 which is a high-order device and a communication line 9 which is a communication line between the controller 8 and the first encoder 3. In addition, the first encoder 3 and the second encoder 4 are connected at least through a communication line 12.

[0057]The motor 1 rotates the input shaft 10 in accordance with a rotation control signal input from the controller 8. The power transmission device 2 rotates the output shaf...

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Abstract

An encoder system includes: a first single-rotation absolute encoder that outputs a first signal corresponding to an angular position of a first rotatable shaft; a power transmission device that transmits the power of the first shaft to a second rotatable shaft with a predetermined transmission ratio; a second single-rotation absolute encoder that outputs a second signal corresponding to an angular position of the second shaft; and a signal processing section that generates data related to the rotation count of the first shaft based on at least the first signal and the second signal.

Description

[0001]This is a Continuation Application of International Application No. PCT / JP2009 / 004126, filed Aug. 26, 2009, which claims priority to Japanese Patent Application Nos. 2008-216773 filed on Aug. 26, 2008, 2008-233793 filed on Sep. 11, 2008, 2008-258603 filed on Oct. 3, 2008, 2008-271628 filed on Oct. 22, 2008, and 2009-092036 filed on Apr. 6, 2009, the contents of which are hereby incorporated by reference in their entirety.BACKGROUND[0002]1. Field of the Invention[0003]The present invention relates to an encoder system as a control system which includes an actuator such as an AC servo motor, for example, used in industrial robots, a position sensor such as an encoder for detecting the positional displacement of the actuator, and a controller.[0004]2. Description of Related Art[0005]Conventionally, in an encoder system, an encoder was generally disposed on an input shaft side of a motor, and it was necessary to use a multiple-rotation absolute encoder having an external battery i...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): G01B7/30G01D5/244G01B21/22G01D5/347G01D5/58G01D5/56G01D5/14
CPCG01B7/30G01D5/2449G01B21/22G01D5/3473G01D5/58G01D5/56G01D5/145
Inventor KISHIDA, HIROYUKIMORITA, TORUTAKAHASHI, YOSHIJIOHNO, KOUNAGASE, TAKASHIOMATA, KENJITAKEUCHI, HIROFUMI
Owner NIKON CORP