JPS58136718U

JPS58136718U - Phase shift type linear position detection device

Info

Publication number: JPS58136718U
Application number: JP3212782U
Authority: JP
Inventors: 渉清水; 裕二松木
Original assignee: 株式会社エスジ−
Priority date: 1982-03-09
Filing date: 1982-03-09
Publication date: 1983-09-14
Also published as: JPH0125286Y2

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図はこの考案に係る検出装置の検出ヘッド部の一実
施例を示す軸方向断面図、第２図は開催の実施例を示す
軸方向断面図、第３図は開催の実施例を示す軸方向断面
図、第４図及び第５図は第１図または第２図の実施例に
おけるコイル結線形式を示す回路図、第６図は第３図の
実施例におけるコイル結線形式を示す回路図、第７図は
検出ヘッド部に基準交流信号を与える回路及び出力信号
の位相ずれを測定する回路の一例を示すブロック図、で
ある。１・・・検出ヘッド部、２・・・コア部、３・・・コア
、４・・・ケーシング、５・・・スペーサー、６・・・
スリーブ、７〜１０，１５．１６・・・１次コイル、１
１〜１４゜１７〜２０・・・２次コイル、３２・・・発
振器、３７・・・位相差検出回路。Fig. 1 is an axial sectional view showing an embodiment of the detection head portion of the detection device according to this invention, Fig. 2 is an axial sectional view showing an embodiment of the holding, and Fig. 3 shows an embodiment of the holding. The axial sectional view, FIGS. 4 and 5 are circuit diagrams showing the coil connection format in the embodiment of FIG. 1 or 2, and FIG. 6 is a circuit diagram showing the coil connection format in the embodiment of FIG. 3. , FIG. 7 is a block diagram showing an example of a circuit that provides a reference AC signal to the detection head and a circuit that measures the phase shift of the output signal. DESCRIPTION OF SYMBOLS 1...Detection head part, 2...Core part, 3...Core, 4...Casing, 5...Spacer, 6...
Sleeve, 7-10, 15.16...Primary coil, 1
1-14° 17-20... Secondary coil, 32... Oscillator, 37... Phase difference detection circuit.

Claims

[Claims for Utility Model Registration] 1. A plurality of primary coils arranged in a predetermined arrangement shifted in the axial direction, a secondary coil provided corresponding to the primary coils, and linearly moved in the axial direction. and a core portion including a plurality of cores that are inserted into the primary and secondary coils and are provided at predetermined intervals in the axial direction, and each of the primary coils has a plurality of phase-shifted references. A phase shifter characterized in that the secondary coil is individually excited by an alternating current signal, thereby producing an output signal in which the reference alternating current signal is phase-shifted in accordance with the linear position of the core portion. type linear position detection device. 2. Each of the cores in the core section has the primary and secondary cores.
The magnetic path has a predetermined length so that the reluctance of the magnetic path passing through the primary coil changes according to the linear position of the core, and the phases of changes in reluctance corresponding to each of the primary coils are shifted from each other by a predetermined phase. The phase shift type linear position detection device according to claim 1, wherein each of the primary coils is arranged in the following manner. 3. The primary and secondary coils are composed of a 4-phase coil group, and are arranged so that the phases of the changes in the slip roughtance of each phase are shifted by 90 degrees according to the linear position of the core portion, and the reluctance changes in each phase are shifted by 90 degrees. Changes separated by 180 degrees 2
One phase is operated in opposite phases to each other using a sine wave signal as the reference AC signal, and another two phases in which the reluctance change is separated by 180 degrees are operated in opposite phases to each other using a cosine wave signal as the reference AC signal. 2. A phase-shift type linear position detection device according to claim 2 of the utility model registration claim, which operates in accordance with claim 2.