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21. 发明专利

JPH11325894A CLINOMETER 失效
公开(公告)号：JPH11325894A
公开(公告)日：1999-11-26
申请号：JP13918598
申请日：1998-05-06
申请人： AKASHI CORP
发明人： YOSHIDA YUSAKU , FURUTA EIJI , UEHARA MASAYOSHI
IPC分类号： G01C9/06 , G01C9/12
摘要： PROBLEM TO BE SOLVED: To provide a clinometer made so that, at the temp. change of a clinometer case, its effect on an underlying capacitor can be possibly suppressed to adequately make the zero point hold of the capacitor, thereby enhancing the accuracy of the inclination measurement. SOLUTION: A part of the bottom inner face of a clinometer case 1 and two first elastic members 11a support three points of the peripheral face of a ring member 10, a part of the bottom inner face of the ring member 10 and two second elastic members 11b support three points of the peripheral face of an annular insulator 6b, and electrodes 6a of a capacitor for detecting the displacement of a columnar lower end 2a of a pendulum is supported on the inner side of the insulator 6b. According to heating of a force motor, the temp. of the case 1 changes to change the inner diameter of the case bottom inner side due to the thermal deformation of the bottom thereof, the first and second elastic members 11a, 11b disposed along the inner side of the case bottom are elastically deformed so as to absorb this change, thereby eliminating effect on the insulator in the capacitor for detecting the deformation of the case bottom.

22. 发明专利

JPH11248449A INCLINOMETER 失效
公开(公告)号：JPH11248449A
公开(公告)日：1999-09-17
申请号：JP6435998
申请日：1998-02-27
申请人： AKASHI CORP
发明人： YOSHIDA YUSAKU , MURAKAMI MITSUO , FURUTA EIJI
IPC分类号： G01C9/06
摘要： PROBLEM TO BE SOLVED: To provide an inclinometer for highly precisely measuring inclination, by preventing the deformation of a pendulum or the case due to the heat storing action of a force motor. SOLUTION: The upper edge of a pendulum 2 arranged inside a case 1 is pivotally fixed to the top part of the case 1, and force motors FM constituted of counter magnetic poles 4 mounted on the side parts of the pendulum 2, and electromagnetic coils 5 mounted on the inside wall of the case 1, are formed. A capacitor C for detecting displacement for detecting the displacement of a pendulum lower edge projecting part 2a is formed so that the inclination of a basement face G can be measured from currents running through the electromagnetic coils 5 for offsetting the displacement detected by the capacitor C. At that time, the force motors FM are formed as a pair in horizontal and vertical directions so that the distortion of the case 1 or the pendulum 2 generated due to heat storage in each electromagnetic coil 5 can be offset in the horizontal and vertical directions, and the displacement detection by the capacitor C can be accurately attained, and the precision of the inclination measurement can be improved.

23. 发明专利

JPH10260076A DEVICE FOR CALIBRATING VIBRATION PICK-UP 失效
公开(公告)号：JPH10260076A
公开(公告)日：1998-09-29
申请号：JP8572997
申请日：1997-03-19
申请人： AKASHI CORP
发明人： NAKAMURA NAOTO , FURUTA EIJI
IPC分类号： G01H9/00 , G01M7/02
摘要： PROBLEM TO BE SOLVED: To provide a device for calibrating a vibration pick-up, in which a vibration mirror and the vibration pick-up can be directly attached to a movable body with no use of an attachment jig. SOLUTION: A device 4 for calibrating a vibration pick-up is composed of a magnetic pole structure including magnetic poles 43a, 43b and an exciting magnetic coil 45 inherent to the poles 43a, 43b and the like, and a movable body 48 having a movable coil 49 and adapted by vibrated under magnetic action between the movable coil 49 and the magnetic poles 43a, 43b, relative to the magnetic structure 43, the magnetic structure 43 being formed thereon with a through-hole 44 which extends along the magnetic core, the movable body 38 having an inner surface side facing the magnetic pole 43 and provided with a vibration mirror 50 for reflecting back a laser beam which has been incident through the through-hole 44 in the magnetic structure 43, so as to allow the laser beam to pass again through the through-hole 44. Further, the movable body 48 is attached at its outer surface with a vibration pick-up attaching part for removable attaching the vibration pick-up 51.

24. 发明专利

JPH10239146A AUTOMATION METHOD IN ABSOLUTE CALIBRATION METHOD OF VIBRATION PICKUP USING INTERFERENCE FRINGE ELIMINATION METHOD 失效
公开(公告)号：JPH10239146A
公开(公告)日：1998-09-11
申请号：JP5984497
申请日：1997-02-27
申请人： AKASHI CORP
发明人： NAKAMURA NAOTO , FURUTA EIJI , GOTO MASAKI
IPC分类号： G01P21/00 , G01H1/00 , G01H9/00 , G01M7/02
摘要： PROBLEM TO BE SOLVED: To perform an absolute calibration by automatic operation without any error by judging whether the value of a count frequency ratio reaches a target value or not, calculating an update output voltage when the target value is not reached, performing vibration with the output voltage, finely adjusting the output voltage of a converter when the target is reached, and calculating the sensitivity as the achieved vibration acceleration when the output is the minimum. SOLUTION: A vibration-generating device generates a vibration with a required, minimum output voltage. The frequency ratio between the frequency of the interference fringes of irradiation light for measurement being counted by a comparison counter and a frequency that is generated by the device is judged, thus judging whether a target frequency ratio has been reached or not. When it has not been reached, an update output voltage is calculated and a vibration is generated with the voltage. When a target frequency is reached, the output voltage of a photoelectric converter is finely adjusted, the detection output voltage of a vibration pickup to be calibrated when the output is minimized is read, and the sensitivity of the vibration pickup to be calibrated is calculated. More specifically, an absolute calibration is made in the target frequency ratio.

25. 发明专利

JPH10185791A HARDNESS TESTER 失效
公开(公告)号：JPH10185791A
公开(公告)日：1998-07-14
申请号：JP35608196
申请日：1996-12-25
申请人： AKASHI CORP
发明人： MORIYAMA MINEAKI , FURUTA EIJI
IPC分类号： G01N3/42
摘要： PROBLEM TO BE SOLVED: To obtain a hardness tester in which the straight advancing property of a sample-mounting table is ensured automatically, in which an indentation formed on a sample is situated surely just under a measuring shaft and by which a hardness test can be made quickly by installing a controller by which the position of a table support base is adjusted fine. SOLUTION: An indenter shaft 11 which is provided with an indenter 11a used to form an indentation on a test piece 20 and an indentation measuring shaft 12 which is provided with a lens 12a used to measure the size of an indentation are arranged in the X-axis direction so as to be separated. Then, a plurality of indentations are formed by the indenter 11a on the test piece 20 which is mounted on a table 4 while the table 4 is being moved to the X-axis direction. Then, the table 4 is moved to the X-axis direction and the Y-axis direction in such a way that the indentations are situated sequentially just under the lens 12a. This operation is performed while a controller fine adjusts a table support base 2 in the X-axis direction and the Y-axis direction. Consequently, when the test piece 20 is moved to the direction of the lens 12a, the indentations can be situated automatically on the optical axis of the lens 12a, and a hardness measurement can be performed quickly and automatically.

26. 发明专利

JP2000028356A METHOD FOR EVALUATING INCLINOMETER 失效
公开(公告)号：JP2000028356A
公开(公告)日：2000-01-28
申请号：JP21482298
申请日：1998-07-14
申请人： AKASHI CORP
发明人： MURAKAMI MITSUO , FURUTA EIJI , YOSHIDA YUSAKU
IPC分类号： G01C9/06 , G01C9/12
摘要： PROBLEM TO BE SOLVED: To shorten initial drifts in evaluating inclinometers. SOLUTION: In this evaluating method, two inclinometers 10 and 20 are placed on a stone level block 02 and then covered with covers 03 and 04 of insulating material, and the inclinometers 10 and 20 are each energized into an actuated state. Then temperate fluctuations inside the covers are detected by a temperature detector 12 placed inside the covers, and temperature correction by the temperature fluctuation data inside the covers detected by the temperature detector 12 is performed on each output data of the inclinometers 10 and 20. Data after temperature correction on the inclinometers is each computed to perform tidal correction successively. By this, it is possible to suppress the effects of temperature fluctuations and to shorten initial drifts.

27. 发明专利

JPH10239149A SUPPORT FOR VIBRATION PICKUP IN VIBRATION EXCITER 失效
公开(公告)号：JPH10239149A
公开(公告)日：1998-09-11
申请号：JP5707797
申请日：1997-02-25
申请人： AKASHI CORP
发明人： NAKAMURA NAOTO , FURUTA EIJI
IPC分类号： G01H9/00 , G01M7/02
摘要： PROBLEM TO BE SOLVED: To provide a support for the vibration pickup in a vibration exciter in which a vibration-proof base is substantially insusceptible to reaction force to the vibration of a vibrator, i.e., a movable body. SOLUTION: The support for the vibration pickup in a vibration exciter comprises a pole structure 41 movable relatively to a vibration-proof base 30, a pole structure reset means 35, e.g. a leaf spring, for resetting the pole structure 41 to a neutral position with respect to the vibration-proof base 30, a movable body 38 having a movable coil 39 and vibrating with respect to the pole structure 41 and the vibration-proof base 30 through magnetic action between a pole 32 and the movable coil 39 while supporting the vibration pickup 10, a movable body supporting part 36 disposed on the vibration-proof base 30 while being separated from the pole structure 41 and supporting the movable body 38 relatively movably such that the acting line of the combined force of reaction force to the vibration of the movable body 38 substantially passes through the center of gravity of the pole structure 41, and means for resetting the movable body 38 to a neutral position with respect to the movable body supporting part 36.

28. 发明专利

JPH10227716A SUPPORTING DEVICE FOR PERPENDICULAR VIBRATING TABLE 失效
公开(公告)号：JPH10227716A
公开(公告)日：1998-08-25
申请号：JP4299797
申请日：1997-02-12
申请人： AKASHI CORP
发明人： YASUYAMA NAOTAKE , SHIBATA TAKAHISA , FURUTA EIJI
IPC分类号： G01M7/02
摘要： PROBLEM TO BE SOLVED: To construct a perpendicular vibrating table supporting device from a plurality of hydrostatic bearings capable of supporting the overturning moment of a perpendicular vibrating table while following the vibration of the perpendicular vibrating table and to prevent overconstraint by the plurality of hydrostatic bearings. SOLUTION: Hydrostatic bearings U1 , U2 , U3 and L1 , L2 , L3 are installed by three at every 120 deg. interval and in two stages around a perpendicular vibrating table 100, with a 60 deg. phase difference between the stages, to support the perpendicular vibrating table. The feedback control systems of the hydrostatic bearings U1 , U2 , U3 of an upper support system and the feedback control systems of the hydrostatic bearings L1 , L2 , L3 of a lower support system are interconnected so that the amounts of feedback matching the relationship among the pistons of the hydrostatic bearings are applied, so as to avoid overconstraint by each hydrostatic bearing.

29. 发明专利

JPH08193873A ACCELELATION SEISMOGRAPH APPARATUS 失效
公开(公告)号：JPH08193873A
公开(公告)日：1996-07-30
申请号：JP444995
申请日：1995-01-13
申请人： AKASHI CORP
发明人： FURUTA EIJI , KAWAGUCHI TAKASHI
IPC分类号： G01H1/00 , G01V1/18
摘要： PURPOSE: To verify an acceleration seismograph apparatus by a remote operation and quickly by veryfying the apparatus in such a way that an instruction is given to a moving element for a gas damper so as to move a pendulum weight. CONSTITUTION: A mobile element 4 for an air damper 5 is provided with a coil 12 at the inside of a ringed gap 11, and prescribed electric power is supplied by an instruction from the outside. The coil 12 acts with a line of magnetic force generated, by a magnet 8, in the ringed gap 11 between a pole piece 9 and a yoke 10, it is moved inside of the ringed gap 11, and it moves the mobile element 4 by an amount corresponding to the prescribed electric power. A pendulum weight 3 is moved by a coupling rod 15 accordingly. An acceleration seismograph apparatus can be verified by whether the movement of the weight 3 is detected by a detection mechanism 6. In this manner, the apparatus can be verified by a remote operation only by applying the electric power from the outside.

30. 发明专利

JP2003166923A HARDNESS TESTER AND HARDNESS TESTING METHOD 审中-公开
公开(公告)号：JP2003166923A
公开(公告)日：2003-06-13
申请号：JP2001366772
申请日：2001-11-30
申请人： AKASHI CORP , MITUTOYO CORP
发明人： FURUTA EIJI , SATO YASUNORI , TSUJII MASAHARU , KOMATSU KOICHI , YOSHIKI RYOICHI
IPC分类号： G01N3/42
摘要： PROBLEM TO BE SOLVED: To provide a hardness tester and a hardness testing method, capable of efficiently measuring the hardness of samples of different thickness and samples of unspecific shapes and improving the reliability of measurement results. SOLUTION: In the hardness tester 1, the image of a sample surface is photographed by a first imaging means (31) to obtain the image of the sample surface, the contour of the sample is extracted by a contour-extracting means (92) on the basis of the image, and a point of hardness measurement is set by a measurement point setting means (92). The coordinates of a location, at which the point of measurement of the sample is in focus, are determined by focus positioning means (32 and 92). On the basis of the obtained coordinates, by a means (5) for elevating and lowering a hardness measuring part (4), the hardness-measuring part (4) is vertically moved to location, at which the point of measurement of the sample is in focus. Then the sample is horizontally moved by a horizontally moving means (7) to a location, at which the point of measurement of the sample is opposed to an indenter of the hardness measuring part. COPYRIGHT: (C)2003,JPO

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