JPS58167411U

JPS58167411U - Phase shift type position detection device

Info

Publication number: JPS58167411U
Application number: JP6425882U
Authority: JP
Inventors: 河野　忠道
Original assignee: エヌエスディ株式会社
Priority date: 1982-05-01
Filing date: 1982-05-01
Publication date: 1983-11-08
Also published as: JPH0428011Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は位相シフト型位置検出装置の測定原理を示す波
形図で、ａは基準交流信号を示し、ｂは出力信号を示す
もの、第２図はこの考案の一実施例を示すブロック図、
第３図は第２図における位相シフト型検出ヘッド部の一
例を概略的に示す平面図である。１０・・・可変磁気抵抗方式による位相シフト型検出ヘ
ッド部、１１・・・ステータ、１２・・・ロータ（可動
鉄心）、ＩＡ〜ＩＤ・・・１次コイル、２Ａ〜２Ｄ・・
・２次コイル、Ａ−Ｄ・・・極、１３・・・シーケンサ
−１，１５・・・三角関数発生回路、１６・・・アナロ
グコンパレータ、１７・・・ラッチ回路。FIG. 1 is a waveform diagram showing the measurement principle of a phase shift type position detection device, where a shows a reference AC signal and b shows an output signal. FIG. 2 is a block diagram showing an embodiment of this invention.
3 is a plan view schematically showing an example of the phase shift type detection head section in FIG. 2. FIG. DESCRIPTION OF SYMBOLS 10... Phase shift type detection head part by variable magnetic resistance method, 11... Stator, 12... Rotor (movable iron core), IA-ID... Primary coil, 2A-2D...
- Secondary coil, A-D... pole, 13... sequencer 1, 15... trigonometric function generation circuit, 16... analog comparator, 17... latch circuit.

Claims

[Claims for Utility Model Registration] 1. A primary coil and a secondary coil are provided on the stator side, a change in magnetic resistance is caused according to the position of the movable iron 4J, and an alternating current signal is applied to the primary coil. The phase shift type detection head is capable of outputting a signal obtained by shifting the phase of the alternating current signal from the secondary coil according to the position of the movable iron core. function generating means for generating a trigonometric function value and applying the trigonometric function value to a primary coil of the detection head;
a comparison means for detecting whether or not the level of the output signal obtained from the detection head unit in response to this application matches a predetermined reference level; and a sequence means for sequentially changing the value of the phase angle data until a match is detected by the comparison means, and a phase angle output from the sequence means when a match is detected by the comparison means. A phase shift type position detection device that uses data as position detection data. 2. The phase shift type detection head section includes terminals for respectively inputting two alternating current signals whose phases are shifted by 90 degrees,
The function generating means generates a sine function value and a cosine function value according to input phase angle data, and applies the generated values to two input terminals of the detection head, respectively. The phase shift type position detection device according to item 1.