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1. 发明专利

JPH05134040A LASER-COPYING TYPE DISPLACEMENT GAGE 失效
公开(公告)号：JPH05134040A
公开(公告)日：1993-05-28
申请号：JP29707191
申请日：1991-11-13
申请人： MITSUBISHI ELECTRIC CORP , KAWASAKI STEEL CO
发明人： TASHIRO HIDEO , FUKAMI AKIRA , OGAWA TAKAHIRO , AIZAWA HITOSHI , NAKANISHI TOSHIHIKO , KAWAKAMI YOSHIO
IPC分类号： G01S7/48 , G01S17/06
摘要： PURPOSE:To obtain a laser-copying type displacement gage, which measures the amount of displacement of a material to be measured stably without contact even if the measuring distance to the material to be measured is long. CONSTITUTION:Laser light is converged on a material to be measured 1, and the scattered light from the material to be measured is condensed so as to obtain the parallel light with an objective lens 4. A beam splitter 22 is provided at the rear side of a condenser lens 5 for condensing the parallel light, and the condensed beam is split into two parts. A first pinhole 23a and a photodetector 8a are provided at the rear side of the focusing position of one of the two beams. A second pinhole 23b and a photodetector 8b are provided in front of the focusing position of the other beam. The displacement and fluctuation of the material to be measured are followed based on the difference signal between the first photodetector 8a and the second photodetector 8b, and the copying control of the optical system is performed with a control system. The amount of the displacement of the material to be measured is detected based on the amount of the following movement of the optical system with a displacement operating means. The displacement gage is constituted of these parts.

2. 发明专利

JPH0540176A LASER DOPPLER SPPEDOMETER 失效
公开(公告)号：JPH0540176A
公开(公告)日：1993-02-19
申请号：JP19812791
申请日：1991-08-07
申请人： MITSUBISHI ELECTRIC CORP , KAWASAKI STEEL CO
发明人： FUJIOKA KATSUSHI , TASHIRO HIDEO , KOIKE ATSUMI
IPC分类号： G01S17/58
摘要： PURPOSE:To obtain a laser Doppler speedometer of which the accurary degradation and failure of measurement by measurement distance change between a moving body and an optical system are well avoided. CONSTITUTION:A laser beam from a laser B2b, different in wave length from laser A2a, is totally passed through a cold mirror 12a. Part of a laser beam from the laser A2a is totally reflected by the cold mirror 12a, and multiplexed with the beam passing through the mirror 12a. The multiplexed laser beam is projected to a moving body 1 via mirrors 11c and 11d. The laser beam scattered by the moving body 1, including the respective components of wavelength of the lasers A2a and B2b, is condensed through lenses 13a and 13b. Of the condensed beam, the component originating from the laser B2b passes through the cold mirror 12b and forms an image on a light receiving surface of a position detector 14, and, on the other hand, the component from the laser A2a is reflected by the cold mirror 12b and led to a light detector 7.

3. 发明专利

JPH0454192B2 失效
公开(公告)号：JPH0454192B2
公开(公告)日：1992-08-28
申请号：JP24235686
申请日：1986-10-13
申请人： MITSUBISHI ELECTRIC CORP
发明人： TASHIRO HIDEO
IPC分类号： G01P3/44 , G01S17/50 , G01S17/88

4. 发明专利

JPH0439885B2 失效
公开(公告)号：JPH0439885B2
公开(公告)日：1992-07-01
申请号：JP8562586
申请日：1986-04-14
申请人： MITSUBISHI ELECTRIC CORP
发明人： TASHIRO HIDEO
IPC分类号： G01B11/04 , G01B11/00

5. 发明专利

JPH0214513B2 失效
公开(公告)号：JPH0214513B2
公开(公告)日：1990-04-09
申请号：JP10625284
申请日：1984-05-25
申请人： MITSUBISHI ELECTRIC CORP
发明人： YOSHIDA KAZUHIKO , MARUYAMA YASUSHI , TASHIRO HIDEO , KAMEI NOBUO
IPC分类号： E04H9/02 , F16F15/02

6. 发明专利

JPS6395373A MEASURING APPARATUS FOR UNEVEN ROTATION 失效
公开(公告)号：JPS6395373A
公开(公告)日：1988-04-26
申请号：JP24044586
申请日：1986-10-09
申请人： MITSUBISHI ELECTRIC CORP
发明人： TASHIRO HIDEO
IPC分类号： G01S17/88 , G01P3/44 , G01S17/58
摘要： PURPOSE:To achieve higher measuring resolutions of uneven rotation of a rotor of a measuring device, by disposing behind a low pass filter a digital-control band pass filter to control center frequency according to rotation frequency. CONSTITUTION:A reflected light of a rotor 1 varies cyclically at each rotation with the surface condition of the rotor 1 and the reflected light level thus varied is supplied to a low-frequency amplifier 14, an output waveform of which changes cyclically. An output signal of the amplifier 14 is shaped 16 in the waveform via a band pass filter 15 for extracting a rotation frequency to obtain a pulse signal of the rotation frequency. On the other hand, a signal of the reflected light beam from the rotor 1 via a photo detector 6, an AC amplifier 7 and the like is inputted into a low pass filter 13 through a variable attenuator 11. A digital-control band pass filter 17 is arranged behind the filter 13 to control center frequency according to the rotation frequency. This enables the extraction of uneven rotation signals as those of the filter 13 buried in white noises thereby achieving higher measuring resolutions with an improved S/N ratio of a low level uneven rotation signal.

7. 发明专利

JPS62240805A LENGTH MEASURING APPARATUS 失效
公开(公告)号：JPS62240805A
公开(公告)日：1987-10-21
申请号：JP8562486
申请日：1986-04-14
申请人： MITSUBISHI ELECTRIC CORP
发明人： TASHIRO HIDEO
IPC分类号： G01B11/04
摘要： PURPOSE:To enable the measurement of the length of a moving object in a non-contact manner, by applying two laser beams to the moving object and by detecting Doppler signals of reflected beams therefrom. CONSTITUTION:A laser beam emitted from a laser unit 7 is split in two by a beam splitter 8, and applied in intersection onto a moving object 1 through transmission optical systems 10a and 10b. Then the wavelength of scattered light from the object 1 bringing forth positive and negative Doppler shifts in accordance with a speed V of the object 1. This scattered light is received by a reception optical system 11 and led to a photodetector 12 to be transduced into an electric signal. There is an alternating signal of a Doppler frequency in this signal. This Doppler signal is amplified 13 and improved in S/W by a frequency tracking unit 14. Then a Doppler frequency proportional to the speed V can be detected as a pulse signal. This Doppler frequency is set in an arbitrary frequency division ratio by a setting switch 16 and subjected to frequency division 15. Then a pulse outputted from a frequency divider 15 turns to be a length measurement pulse outputting a unit length per one pulse. By counting 4 this pulse, the length of the object 1 can be measured.

8. 发明专利

JPS62217177A MEASURING INSTRUMENT FOR ROTATION IRREGULARITY 失效
公开(公告)号：JPS62217177A
公开(公告)日：1987-09-24
申请号：JP6147786
申请日：1986-03-19
申请人： MITSUBISHI ELECTRIC CORP
发明人： TASHIRO HIDEO
IPC分类号： G01P3/36 , G01P3/44 , G01S17/58 , G01S17/88
摘要： PURPOSE:To directly measure the rotating speed and rotational irregularity of a body of rotation at the same time by adding a means which detects the rotating speed of the body of rotation from periodic level vibration of received light due to the flaw, roughness, etc., of the surface of the body of rotation. CONSTITUTION:Devices 1-3 in a figure are of the same constitution as a rotational irregularity measuring instrument which uses a conventional noncontact optical speed sensor and the rotational irregularity of the body 1 of rotation is found as wow and flutter. Reflected light from the body 1 of rotation varies in level periodically at a period T0 on every turn of the body 1 of rotation owing to the flaw, roughness, etc., of the surface of the body 1 of rotation. The output of a photodetector 6 is amplified by a DC amplifier 15 and the center frequency f0 of a band-pass filter 16 is so adjusted that the indicated value of a level meter 17 is maximum, thereby obtaining a sine wave signal with the period T0 as the output signal. This signal is waveform-shaped by a waveform shaping device 18 and a pulse counter 19 counts pulses or period T0 in time units, thereby measuring the rotating frequency of the body 1 of rotation directly without measuring the radius (r) of rotation.

9. 发明专利

JPS6234089A FREQUENCY TRACER 失效
公开(公告)号：JPS6234089A
公开(公告)日：1987-02-14
申请号：JP17301885
申请日：1985-08-06
申请人： MITSUBISHI ELECTRIC CORP
发明人： TASHIRO HIDEO
IPC分类号： G01S17/50
摘要： PURPOSE:To attain to enhance resolving power and response from the aspect of speed operation at the time of a low speed, by providing a frequency divider to the output terminal of VCO and enhancing the output frequency of VCO by the frequency dividing ratio times of input Doppler frequency due to the frequency divider. CONSTITUTION:A frequency divider 9m dividing input frequency is provided to the output terminal of VCO9g outputting local frequency tracing input frequency upon the reception of the signal obtained by adding the output signal of a level controller 9i and the output signal of an integrator 9e. When the frequency dividing ratio of the frequency divider 9m is set to 1/N, the frequency divider 9m operates so as to make the output frequency thereof equal to input Doppler frequency fd and, therefore, frequency N.fd high by N times the input Doppler frequency fd is obtained with respect to the output of VCO9g and, if the output of VCO9g is set to a speed operation signal, resolving power can be held even in high speed sampling at the time of a low speed.

10. 发明专利

JPS61239183A FREQUENCY TRACKING DEVICE 失效
公开(公告)号：JPS61239183A
公开(公告)日：1986-10-24
申请号：JP8071485
申请日：1985-04-16
申请人： MITSUBISHI ELECTRIC CORP
发明人： TASHIRO HIDEO
IPC分类号： G01S17/50 , G01S17/58 , H03L7/00 , H03L7/12
摘要： PURPOSE:To obtain a tracking device whose loop gain is scarcely varied even with a variation of an input signal, by providing an AGC circuit consisting of a multiplier and an error amplifier, on an output terminal of a detector. CONSTITUTION:When an input signal S/N drops, an output of a detector 9c also drops in proportion to it. Accordingly, an output of a multiplier 9m also works on the dropping direction, but when it is set in advance in the direction where an output of an error amplifier 9n increases when it becomes lower than a set voltage of the error amplifier 9n, a gain of the multiplier 9m increases, the output of the multiplier 9m acts so as to increase, and after all, the output of the multiplier 9m is balanced at a value of the set voltage of the error amplifier 9n. This action is the same even in case when the signal S/N has increased. In this way, by keeping the input level of a synchronizing detector 9d constant, the loop gain becomes constant.

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