JPS62168408U

JPS62168408U -

Info

Publication number: JPS62168408U
Application number: JP4464487U
Authority: JP
Priority date: 1987-03-26
Filing date: 1987-03-26
Publication date: 1987-10-26

Description

[Brief explanation of drawings]

第１図は本考案による情報検索装置における微
細間隔位置決め装置の一実施例を示す構成概略図
、第２図は該微細間隔位置決め装置に用いた光学
式位置検出スケールの説明図、第３図はゼロクロ
スレベルのアナログ位置信号の説明のための波形
図、第４図はポジシヨナの位置決め制御駆動の状
態を示すブロツク図、第５図は本考案の装置に用
いたインデツクススケールの説明図、第６図はア
ナログ位置信号波形と、微細間隔位置決めのため
の信号選択および指令電圧レベル設定の説明図、
第７図は本考案のインデツクススケールの他の実
施例の説明図である。１……メインスケール、２，２１，２２，２３
……インデツクススケール、２ａ，２ｂ，２１ａ
，２１ｂ，２２ａ，２２ｂ，２３ａ，２３ｂ……
マスク窓、３……フオトセンサブロツク、４……
ポジシヨナ、５……光源、６……ムービングコイ
ル、７……マグネツト、８……サイドヨーク、９
……センタヨーク。 FIG. 1 is a schematic configuration diagram showing an embodiment of a fine interval positioning device in an information retrieval device according to the present invention, FIG. 2 is an explanatory diagram of an optical position detection scale used in the fine interval positioning device, and FIG. A waveform diagram for explaining the zero-cross level analog position signal, FIG. 4 is a block diagram showing the positioning control driving state of the positioner, FIG. 5 is an explanatory diagram of the index scale used in the device of the present invention, and FIG. The figure shows an analog position signal waveform, an explanatory diagram of signal selection and command voltage level setting for fine interval positioning,
FIG. 7 is an explanatory diagram of another embodiment of the index scale of the present invention. 1...Main scale, 2, 21, 22, 23
...Index scale, 2a, 2b, 21a
, 21b, 22a, 22b, 23a, 23b...
Mask window, 3... Photo sensor block, 4...
Positioner, 5...Light source, 6...Moving coil, 7...Magnet, 8...Side yoke, 9
...Center York.

Claims

[Claims for Utility Model Registration] A main scale with striped position detection marks of length l, an index scale, a light receiving element, and a differential amplifier are used to detect n(l>n≧
2) In an information retrieval device that generates a set of n zero-crossing level position signals with shifted phase differences, controls the positioning of a positioner at a predetermined position by intermittent selection operations, and reads out information from the differential amplifier. A switching selection means for extracting one position signal and a command level setting means for varying the stop position command voltage level in (l/m)/n steps are provided, and the switching selection means is provided to change the stop position command voltage level to (l/m)/n steps.
A fine interval positioning device in an information retrieval device, characterized in that the positioner is controlled to position the positioner at a predetermined position with respect to an information recording medium recorded in step m).