Absolute Encoder and Rotary Position Data Transmission Method

An absolute encoder and rotary position technology, which is applied in the direction of converting sensor output, instruments, measuring devices, etc., can solve the problems of time-consuming, large number of pulses, etc., and achieve the effect of fast transmission

Active Publication Date: 2018-11-09
SANKYO SEIKI MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, in the absolute encoder described in Patent Document 1, there is a problem that the number of pulses to be transmitted may become large, and it may take time for transmission.

Method used

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  • Absolute Encoder and Rotary Position Data Transmission Method
  • Absolute Encoder and Rotary Position Data Transmission Method
  • Absolute Encoder and Rotary Position Data Transmission Method

Examples

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Comparison scheme
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Embodiment approach 1

[0150] In addition to the above-described embodiment, each bit length of the divided data may be determined based on a parameter that can be set on the high-level device 2 side, that is, on the client side. Hereinafter, this structure will be described as another Embodiment 1. FIG.

[0151] according to Figure 4 (a) is described as a specific example: as a parameter indicating a predetermined bit length divided by the host device 2, a parameter table indicating a parameter number and a bit length of divided data is designated by the client and set in the control unit 10. middle. The control unit 10 stores this parameter table in advance, for example, as an internal parameter (client setting) in a built-in storage medium, and refers it when dividing the rotational position data. Alternatively, it may be transmitted from the host device 2 without being stored in the built-in storage medium. Here, the bit length of the divided data can be designated as a value from 0 to 24, f...

Embodiment approach 2

[0159] Furthermore, it is also possible to set a bit length exceeding the total number of bits of the rotation position data in the parameter table described in the first embodiment. Hereinafter, this structure will be described as another Embodiment 2. FIG.

[0160] according to Figure 4 (b) As a specific example, the total number of bits of the rotation position data is 32 bits, corresponding to the parameter numbers "0", "1", "2", "3", "4", and "5" in the parameter table The case where the bit lengths of 1 are respectively set to "2", "8", "8", "8", "8", and "0" will be described as an example.

[0161] In this example, the control unit 10 assigns "0" for 2 bits to the part exceeding 32 bits, and can transmit the divided data of the parameter number 0 by making the host device 2 recognize that there is a transmission time of 2 bits. Thereafter, the control unit 10 transmits four divided data divided by 8 bits in the same manner as in the first embodiment described above....

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Abstract

The present invention provides an absolute encoder which is able to send rotational position data at high speeds. The absolute encoder (1) belongs to an encoder which can detect a rotational position as the absolute mode for rotational position data. A bit division part (110) can divide the rotational position data in the specified bit length. An increment signal part (120) calculates count values for each division data divided by the bit division part (110) respectively, and sends increment signals corresponding to the count values to an upper device (2).

Description

technical field [0001] The invention relates to an absolute encoder and a rotational position data transmission method, in particular to an absolute encoder and a rotational position data transmission method capable of speeding up the transmission time of the rotational position data. Background technique [0002] Conventionally, there is a device called a magnetic or optical encoder capable of detecting the rotational position of a shaft of a motor or the like as rotational position data. In addition, there are two types of encoders: an incremental encoder (hereinafter referred to as an incremental encoder) that relatively detects a rotational position; and an absolute encoder (hereinafter referred to as an incremental encoder) that detects an absolute rotational position. , called an absolute encoder). [0003] Among them, the incremental encoder outputs a pulse train as an incremental signal according to the rotational displacement of the shaft. In addition, the absolut...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D5/245
Inventor 海老根徹伊藤彰启渡边洋和
Owner SANKYO SEIKI MFG CO LTD
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