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1. 发明专利

JPS6252326B2 失效
公开(公告)号：JPS6252326B2
公开(公告)日：1987-11-05
申请号：JP8186481
申请日：1981-05-30
申请人： HITACHI SEIKO KK , ODAWARA GOTARO
发明人： YAMAGUCHI TAKESHI , KANETANI YASUHIKO , MAKINO TOSHUKI , ODAWARA GOTARO
IPC分类号： G06F3/046 , G06F3/033 , G06F3/041 , G06K11/06

2. 发明专利

JPS63290916A OPTICAL LINEAR SCALE DEVICE 失效
公开(公告)号：JPS63290916A
公开(公告)日：1988-11-28
申请号：JP12646687
申请日：1987-05-22
申请人： TOKYO AIRCRAFT INSTR CO , ODAWARA GOTARO
发明人： KONDO TOSHIO , ODAWARA GOTARO , TAKEDA TAKEHIKO , YOKOTA YASUO , NISHIMURA HISAO
IPC分类号： G01B11/00 , G01D5/249 , G01D5/36
摘要： PURPOSE:To take a measurement instantaneously at any stop position by arranging a scale plate which has many graduations while a pattern for enabling the recognition of an absolute position is formed so that the scale plate can moves relatively opposite a photosensor. CONSTITUTION:Many photodetecting elements are arranged in two dimensions to form the photosensor 4. A slit array which constitutes a scale is formed on the scale plate 3. A sensor part is constituted by arranging a light source 1, a collimator lens 2, the scale plate 3, and the photosensor 4 integrally. This sensor part can move relatively in parallel along the slit array on the scale plate 3. Light emitted by a light source 1 becomes parallel light by passing through the collimator lens 2 and passes through slits on the scale 3 to project the slit image on the photosensor 4. This projection signal is led out of the respective photodetecting elements individually and inputted to an arithmetic circuit 5.

3. 发明专利

JPS6232403B2 失效
公开(公告)号：JPS6232403B2
公开(公告)日：1987-07-14
申请号：JP3330782
申请日：1982-03-03
申请人： KEIHIN DENSOKUKI KK , ODAWARA GOTARO
发明人： UEDA TAKESHI , ODAWARA GOTARO
IPC分类号： G01B11/00 , G01D5/249 , G01D5/36

4. 发明专利

JPS6333603A OPTICAL POSITION DETECTOR 失效
公开(公告)号：JPS6333603A
公开(公告)日：1988-02-13
申请号：JP1582587
申请日：1987-01-24
申请人： KEIHIN DENSOKUKI KK , ODAWARA GOTARO
发明人： UEDA TAKESHI , ODAWARA GOTARO
IPC分类号： G01B11/00 , G01D5/249 , G01D5/34 , G01D5/347
摘要： PURPOSE:To achieve a higher measuring accuracy, by a method wherein patterns with unequal ranges are arrayed on measuring blocks and the interval thereof is kept constant among the same measuring blocks while being differentiated among different blocks. CONSTITUTION:A scale plate 3 is divided into a plurality of measuring blocks B1-BK entirely along the length thereof. Numerous patterns 4 are provided in the measuring blocks with the width Wi differing from one another. An irradiation light l from a light source 5 is transmitted through the scale plate 3 having the patterns 4 to project the patterns 4 of the scale plate 3 onto an image sensor 1. Then, output signals outputted individually from the light receiving elements 2 of the image sensor 1 are inputted into an arithmetic circuit 10, which computes the movement of the sensor 1.

5. 发明专利

JPS633201A MAGNETIC POSITION DETECTING DEVICE 失效
公开(公告)号：JPS633201A
公开(公告)日：1988-01-08
申请号：JP14647086
申请日：1986-06-23
申请人： KEIHIN DENSOKUKI KK , ODAWARA GOTARO
发明人： ODAWARA GOTARO , KANO MICHIO , UEDA TAKESHI
IPC分类号： G01B7/00 , G01D5/245
摘要： PURPOSE:To detect a position and a movement quantity magnetically with high accuracy by allowing a head part and an auxiliary scale to move relatively in parallel and detecting magnetic flux from a magnetic mark by a magnetic head. CONSTITUTION:The head pat 1 comes close to the auxiliary scale 3 and moves relatively in parallel to the array direction of magnetic marks 5. Magnetic flux from a mark 5 on the auxiliary scale 3 is detected by the magnetic head 2 and output signals which are outputted by individual heads 2 and put together are inputted to an arithmetic circuit 10. When mark intervals of the auxiliary scale 3 are all equalized, a position calculating circuit 12 selects the interval between two certain marks 5 based on the output signal of the head part 1 before the head part 1 moves because the positions of the respective marks 5 are stored in the position calculating circuit 12 previously to detect whether or not the head 2 passes in the interval, thereby calculating the movement distance of the head part 1 by the circuit 12. Further, even when the intervals of the marks 5 are all different, the movement distance of the head pat 1 is easily found similarly.

6. 发明专利

JPS633220A OPTICAL LINEAR SCALE 失效
公开(公告)号：JPS633220A
公开(公告)日：1988-01-08
申请号：JP14646986
申请日：1986-06-23
申请人： KEIHIN DENSOKUKI KK , ODAWARA GOTARO
发明人： ODAWARA GOTARO , KANO MICHIO , UEDA TAKESHI
IPC分类号： G01D5/36 , G01D5/38
摘要： PURPOSE:To take an accurate measurement by providing an optical sensor and a scale plate and finding the relative position and movement quantity of a body to the extent of the side of one unit of a photodetecting element, and further interpolating a finer movement quantity than the measurement resolution of the photodetecting element by using moire fringes. CONSTITUTION:The optical sensor 1 where many photodetecting elements 2 are arranged in two arrays and a light source 7 are fixed in one body and move relatively in parallel to the array direction of slits 4 (414n44) on the scale plate 3. Here, when the presence of fringe patterns 4 and 5 is ignored, illumination light emitted by the light source 7 is transmitted through slits 4 of the scale plate 3 to project the image of the slits 4 on the sensor 1. Then, outputs from respective elements 2 of the sensor 1 are inputted to an arithmetic circuit. In this case, the shape and intervals of the slits 4 are selected and the position or movement quantity of the scale plate 3 is detected. Displacement smaller than one picture element of the elements 2, however, can not be detected by this, so moire fringes are formed by fringe patterns 5 and 6 provided to the surfaces of the sensor 1 and scale plate 3 for interpolation, and the moire fringes are read.

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