JPS60131402A

JPS60131402A - Length measuring method

Info

Publication number: JPS60131402A
Application number: JP23891083A
Authority: JP
Inventors: Masahiro Morita; 正博森田
Original assignee: Individual
Current assignee: Individual
Priority date: 1983-12-20
Filing date: 1983-12-20
Publication date: 1985-07-13
Also published as: JPH0342602B2

Abstract

PURPOSE:To measure length accurately by counting displacement and pressure variation between surfaces A and B owing to the horizontal movement of an index grating B on a scale grating A formed by recording N and S magnetic gradations. CONSTITUTION:Magnetic gradations are recorded on a scale grating A and an index grating B to form moire fringes to double length. Those A and B are put one over another at an angle theta of intersection, and when they move laterally so that magnetic poles N and N are superposed, the scales A and B repel each other, but when magnetic poles N and S are superposed, the scales A and B attracts each other. For the purpose, a sensor X such as a pressure sensor, strain gauge, load cell, magnetic sensor, and proximity sensor, is installed between the A and B, and then the sensor X generates an electric signal by the repellency and attraction owing to the movement of the magnetic scales A and B, so the signal is counted to take a measurement of length.

Description

【発明の詳細な説明】この発明は長さの測定方法に関する。[Detailed description of the invention] The present invention relates to a method for measuring length.

モアレ縞をなす如きスケール格子Ａとインデツクス格子
Ｂに磁気目盛を記録し、スケール格子Ａ及びスケール格
子の２倍の長さで記録したインデツクス格子のそれぞれ
１本を例にとると、このＡとＢを交叉角θで重ね合せ、
これを横方向に移動すると第１図の如く、ＮとＮが重な
り合つたときはＡとＢは反発し、第２図の如くＮとＳが
重なるとＡとＢは吸引する。従つてＡ・Ｂの間に、圧力
感知器、歪計、ロードセルなどのセンサーＸを設置する
と、ＸはＡ・Ｂの磁気スケールの移動による反発、吸引
により電気信号を発生するから、これをカウントして長
さを測定することができる。For example, magnetic scales are recorded on scale grating A and index grating B, which form Moiré fringes, and one of each of the scale gratings A and index grating is recorded with twice the length of the scale gratings. are superimposed at the intersection angle θ,
When this is moved laterally, as shown in Fig. 1, when N and N overlap, A and B repel, and when N and S overlap as shown in Fig. 2, A and B attract each other. Therefore, if a sensor X such as a pressure sensor, strain meter, or load cell is installed between A and B, X will generate an electric signal due to the repulsion and attraction caused by the movement of the magnetic scales of A and B, and this will be counted. You can then measure the length.

スケール格子Ａ・インデツクス格子Ｂを同じ長さで目盛
つた組合せでもＡＢ間に反発と中間点との強弱の信号を
とることができる。Even with a combination in which scale grating A and index grating B are graduated with the same length, it is possible to obtain strong and weak signals between the repulsion between AB and the intermediate point.

インデツクス格子の目盛はスケール格子の目盛のＮ倍と
してもよい。The scale of the index grid may be N times the scale of the scale grid.

[Brief explanation of the drawing]

第１図、第２図はスケール格子Ａとインデツクス格子Ｂ
のそれぞれ１本の磁気記録磁極が相互に影響し合う状態
を示す。特許出願人　森田正博Figures 1 and 2 show scale grid A and index grid B.
This shows a state in which each one of the magnetic recording magnetic poles influences each other. Patent applicant Masahiro Morita

Claims

[Claims]

As shown in the text and drawings, the scale grating A and the index grating B of the length measuring section, which are formed by combining the scale grating A and the index grating B at an intersecting angle θ, are made of a magnetic material,
A scale grating created by recording magnetic scales of N and S on scale grating A and index grating B, and as B moves horizontally on A, the magnetic poles on A and the magnetic poles on B attract and repel each other. A length measurement method that measures the length by sensing displacement and pressure changes between surface A and index grid B and counting them.