JPS5871855U

JPS5871855U - digitizer

Info

Publication number: JPS5871855U
Application number: JP16781781U
Authority: JP
Inventors: 一桑原; 俊雄飯野
Original assignee: Yokogawa Electric Corp
Current assignee: Yokogawa Electric Corp
Priority date: 1981-11-11
Filing date: 1981-11-11
Publication date: 1983-05-16

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図は先願（特願昭５５−１１５７４０号）の動作原
理を示す構成説明図、第２図は第１図装置においてカー
ソルから得られる信号の信号波形図、第３図は第１図装
置において、絶縁板２０の両端付近にカーソルがある場
合、カーソルから得られる信号波形図、第４図は本考案
に係る装置の構成ブロック図、第５図は導体ループの電
流駆動のタイミングを示す図、第６図はスムージング回
路の動作を説明するための波形図、第７図はカウンタの
動作を説明するための波形図、第８図は絶縁板の両端付
近にカーソルがある場合の動作を説明するための動作波
形図である。２０・・・絶縁板、２１・・・導体ループ、２２・・・
スイッチ回路、３０・・・磁束検出カーソル、３１・・
・同調回路、３２・・・プリアンプ、３３・・・有極性
検波器、３４・・・スムージング回路、７３５・・・整
流回路、３６・・・バンドパスフィルタ、３７・・・カ
ウンタ。６′°°“゛足− Ｗ＃間Fig. 1 is a configuration explanatory diagram showing the operating principle of the earlier application (Japanese Patent Application No. 55-115740), Fig. 2 is a signal waveform diagram of the signal obtained from the cursor in the device shown in Fig. 1, and Fig. 3 is the same as that shown in Fig. 1. In the device, when the cursor is located near both ends of the insulating plate 20, a signal waveform diagram obtained from the cursor, FIG. 4 is a block diagram of the configuration of the device according to the present invention, and FIG. 5 shows the timing of current drive of the conductor loop. Figure 6 is a waveform diagram to explain the operation of the smoothing circuit, Figure 7 is a waveform diagram to explain the operation of the counter, and Figure 8 shows the operation when the cursor is located near both ends of the insulating plate. FIG. 3 is an operational waveform diagram for explanation. 20... Insulating plate, 21... Conductor loop, 22...
Switch circuit, 30... Magnetic flux detection cursor, 31...
- Tuning circuit, 32... Preamplifier, 33... Polar detector, 34... Smoothing circuit, 735... Rectifier circuit, 36... Band pass filter, 37... Counter. 6'°°"゛ foot - W#

Claims

[Scope of utility model registration request]

(1) In a digitizer in which a plurality of conductor loops are arranged on an insulating plate, a current is sequentially applied to the conductor loops, and a magnetic flux detection cursor is used to detect the magnetic flux generated from the conductor loops, the conductor loops are arranged near both ends of the insulating plate. A digitizer characterized in that the width of a conductor loop and/or the arrangement pitch of the conductor loops are narrower than the width or arrangement pitch of other parts.

(2) The digitizer according to claim 1, wherein the magnitude of the drive current flowing through the conductor loops arranged near both ends of the insulating plate is smaller than the drive current in other parts.