Title:
DISPLACEMENT MEASURING DEVICE
Document Type and Number:
WIPO Patent Application WO/1982/003682
Kind Code:
A1
Abstract:
A displacement measuring device, using an incremental code, which includes a coding member (22) resting on the object (21) to be measured and having a coding section for generating such signals that a sensing element can discriminate the signals as 0 or 1, sensing means (25A, 25B) disposed to sense the coding section of the coding member for producing sensed signals in response to the displacement of the coding member (22), and rectangular wave-converting circuits (27A, 27B) for receiving and converting the sensed signal into rectangular wave signals. A clock pulse generator (28) is provided in the device for generating a clock pulse with a higher repetition-frequency than the repetition-frequency of the sensed signal. An edge detector (29) receives the clock pulse from the clock pulse generator (28) and the rectangular wave-signal from the rectangular wave-converting circuits (27A, 27B) and then delivers, as an output pulse, the clock pulse nearest to the leading edge and the trailing edge of the rectangular wave-signal. A counter (30) counts the output pulses from the edge detector and a display (31) indicates the counted value. Thus constructed, an incremental displacement measurement can be made without a differential circuit and an averaging circuit.
Inventors:
SASAKI TSUNEO (JP)
OHTOMO FUMIO (JP)
YOKOKURA TAKASHI (JP)
KONDO FUMITOMO (JP)
OHTOMO FUMIO (JP)
YOKOKURA TAKASHI (JP)
KONDO FUMITOMO (JP)
Application Number:
PCT/JP1982/000119
Publication Date:
October 28, 1982
Filing Date:
April 12, 1982
Export Citation:
Assignee:
TOKYO OPTICAL (JP)
SASAKI TSUNEO (JP)
OHTOMO FUMIO (JP)
YOKOKURA TAKASHI (JP)
KONDO FUMITOMO (JP)
SASAKI TSUNEO (JP)
OHTOMO FUMIO (JP)
YOKOKURA TAKASHI (JP)
KONDO FUMITOMO (JP)
International Classes:
G01D5/36; G01D3/028; G01D5/244; G01D5/245; G01P3/481; G01P3/489; H03M1/00; (IPC1-7): G01D5/245; G01P3/481
Foreign References:
| JPS5729911A | 1982-02-18 |
Other References:
IMAI TAKASHI "Wakariyasui Electronics Keisokuho" "Denshi Kagaku Series" 24, 6-han, 30. September.1977 (30.9.77) Sanpo Shuppan Kabushiki Kaisha, Dai 4-Hen, Dai 1-Sho, 1.6, 1.23
SAWABE MASAJI KANSHU, "Shiritai Sokutei No Jidoka" 1.October.1971 (01.10.71) Japan Machinist Kabushiki Kaisha III-5 Rotary Encoder
Inomata Shinzaburo "Sokudo Oyobi Kaiten" Keiryo Kanri Gijutsu Sosho (28) 30.November. 1961 (30.11.61) Corona Kabushiki Kaisha p.104 Fig. 114(b)
See also references of EP 0076861A4
SAWABE MASAJI KANSHU, "Shiritai Sokutei No Jidoka" 1.October.1971 (01.10.71) Japan Machinist Kabushiki Kaisha III-5 Rotary Encoder
Inomata Shinzaburo "Sokudo Oyobi Kaiten" Keiryo Kanri Gijutsu Sosho (28) 30.November. 1961 (30.11.61) Corona Kabushiki Kaisha p.104 Fig. 114(b)
See also references of EP 0076861A4
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