JPS61135216U

JPS61135216U -

Info

Publication number: JPS61135216U
Application number: JP1754485U
Authority: JP
Priority date: 1985-02-09
Filing date: 1985-02-09
Publication date: 1986-08-23

Description

[Brief explanation of the drawing]

第１図は本考案の基本概念を示す構成図、第２
図は本考案の一実施例を示すシステム構成図、第
３図は回転位置検出装置機構部斜視図、第４図は
本考案の一実施例で行われる処理を示すフローチ
ヤート、第５図は本考案の一実施例の制御タイミ
ングを示すタイミングチヤートである。ａ……回転軸、ｂ……回転速度検出手段、ｃ…
…第１のパルス発生手段、ｄ……第２のパルス発
生手段、ｅ……回転位置検出手段、１０……電子
制御装置（ＥＣＵ）、２０……デイジタル制御部
、１……格子円板、２……主目盛格子、３……副
目盛格子、５……回転軸、７ａ……主目盛格子用
光源、７ｂ……主目盛格子用受光素子、７ｃ……
主目盛格子用走査格子、８ａ，９ａ……副目盛格
子用光源、８ｂ，９ｂ……副目盛格子用受光素子
、８ｃ，９ｃ……副目盛格子用走査格子。 Figure 1 is a configuration diagram showing the basic concept of the present invention, Figure 2
The figure is a system configuration diagram showing an embodiment of the present invention, Fig. 3 is a perspective view of the mechanism of the rotational position detection device, Fig. 4 is a flowchart showing the processing performed in an embodiment of the present invention, and Fig. 5 is a 1 is a timing chart showing control timing of an embodiment of the present invention. a... Rotating shaft, b... Rotating speed detection means, c...
...first pulse generating means, d...second pulse generating means, e...rotational position detecting means, 10...electronic control unit (ECU), 20...digital control unit, 1...grid disk, 2...Main scale grating, 3...Sub scale grating, 5...Rotation axis, 7a...Light source for main scale grating, 7b...Light receiving element for main scale grating, 7c...
Main scale grating scanning grating, 8a, 9a... light source for sub scale grating, 8b, 9b... light receiving element for sub scale grating, 8c, 9c... scanning grating for sub scale grating.

Claims

[Claims for Utility Model Registration] 1. A rotational speed detection means for detecting the rotational speed of a rotating shaft; a first pulse generating means for generating a pulse train in response to the rotation of the rotating shaft; a second pulse generating means that generates a pulse train of a higher frequency than the first pulse generating means; and when the rotational speed of the rotating shaft obtained from the rotational speed detection means is equal to or higher than a predetermined speed, the first pulse Rotational position detection means that detects the rotational position based on the pulse train from the second pulse generation means and detects the rotational position based on the pulse train from the second pulse generation means when the rotational speed of the rotating shaft is below a predetermined speed. A rotational position detection device comprising: 2. The first pulse generating means is connected to first grid rows arranged at equal intervals in the circumferential direction of the rotating disk;
A second pulse generating means is provided on the rotating disk with a narrower interval than the first grating row in the radial direction than the first grating row. A second grid row arranged at equal intervals on the outside and two grid rows corresponding to the second grid row.
The rotational position detection device according to claim 1, which is characterized by comprising a pair of light source and light receiving element.