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公开(公告)号：US5812250A
公开(公告)日：1998-09-22
申请号：US886531
申请日：1997-07-01
申请人： Yasuhiko Ishida , Hidejiro Kadowaki , Makoto Takamiya , Jun Ashiwa , Shigeki Kato , Shinji Ueda
发明人： Yasuhiko Ishida , Hidejiro Kadowaki , Makoto Takamiya , Jun Ashiwa , Shigeki Kato , Shinji Ueda
摘要： A Doppler velocimeter determines a state of noise generation in a detection signal including a Doppler signal component based on comparison by a preceding/succeeding-signal comparator for comparing the detection signals before and after passing through a band-pass filter for cutting noise adjusted to the frequency of the detection signal, and/or includes a filter circuit for determining passage/interruption of the detection signal after passing through the band-pass filter from a relationship between the count value of a first counter, in which the output of a first frequency multiplier for multiplying the frequency of the detection signal by N is made to be a clock signal and a leading edge in the detection signal is made to be a reset trigger, and a leading edge in the detection signal, and/or includes an error signal generator for generating an error detection signal by detecting a periodic error in the detection signal after passing through the band-pass filter from a relationship between the count value of a second counter, in which the output of a second frequency multiplier for multiplying the frequency of the detection signal by N and a leading edge in the detection signal is made to be a reset trigger, and a leading edge in the detection signal after passing through the band-pass filter, and/or includes a phase comparator for generating a control signal by comparing the phase of the detection signal with the phase of a comparison signal to be compared, an oscillator for controlling the frequency of its output signal in accordance with the control signal from the phase comparator, and a comparison-signal generation unit for generating a comparison signal based on the output of the oscillator. When an error has been detected, a switching unit interrupts the control signal and the phase comparator is reset and stops comparison, and when the error has ended, the switching unit communicates the control signal, the phase comparator starts comparison, and the comparison-signal generation unit generates a comparison signal whose phase coincides with the phase of the detection signal.
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2.发明授权Doppler velocimeter and position information detection apparatus for use with objects having variations in surface depth 失效多普勒测速仪和位置信息检测装置，用于具有表面深度变化的物体
公开(公告)号：US5502466A
公开(公告)日：1996-03-26
申请号：US266740
申请日：1994-06-28
申请人： Shigeki Kato , Hidejiro Kadowaki , Yasuhiko Ishida , Makoto Takamiya , Jun Ashiwa , Shinji Ueda
发明人： Shigeki Kato , Hidejiro Kadowaki , Yasuhiko Ishida , Makoto Takamiya , Jun Ashiwa , Shinji Ueda
摘要： A position information detection apparatus includes a first detection system for radiating two collimated light beams onto an object to be measured at a predetermined crossing angle to form interference fringes at a predetermined interval, and detecting scattered light emanating from the object to be measured by the interference fringes at the predetermined interval, a second detection system for radiating two light beams onto the object to be measured at a predetermined crossing angle to form interference fringes having a gradient with each other in an opposing direction to the object to be measured, and detecting scattered light emanating from the object to be measured by the interference fringes having the gradient, and a detection unit for comparing output signals from the first and second detection systems, and detecting relative position information, along the opposing direction of the first and second detection systems, of the object to be measured.
摘要翻译： 位置信息检测装置包括：第一检测系统，用于以预定的交叉角将两个准直光束照射到被测量物体上以形成预定间隔的干涉条纹;以及检测由待干扰物体发出的散射光 以预定间隔的条纹，用于以预定交叉角将两束光束照射到待测量物体上的第二检测系统，以形成在与被测量物体相反的方向上彼此具有梯度的干涉条纹，并且检测散射 通过具有梯度的干涉条纹从被测量物体发出的光;以及检测单元，用于比较来自第一和第二检测系统的输出信号，并且沿第一和第二检测系统的相对方向检测相对位置信息， 的待测物体。
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3.发明授权Frequency tracking method and apparatus, and Doppler velocity meter using the same 失效频率跟踪方法和装置，以及使用相同的多普勒测速仪
公开(公告)号：US5696578A
公开(公告)日：1997-12-09
申请号：US60533
申请日：1993-05-13
申请人： Yasuhiko Ishida , Hidejiro Kadowaki , Makoto Takamiya , Jun Ashiwa , Shigeki Kato , Shinji Ueda
发明人： Yasuhiko Ishida , Hidejiro Kadowaki , Makoto Takamiya , Jun Ashiwa , Shigeki Kato , Shinji Ueda
CPC分类号： G01S17/58 , G01P3/366 , G01S7/4917
摘要： This invention has as its object to provide a frequency tracking method, a frequency control apparatus (tracking apparatus) using this method, and a Doppler velocity meter using the same, which easily and quickly allow the center frequency of a band pass filter to coincide with the frequency of an input signal even when an input signal suffers from a large level drift. A tracking method for a center frequency of a band-pass filter relates to a method including the deviation information detection step of detecting deviation information of the frequency of a signal to be input to the band-pass filter or a signal output from the band-pass filter with respect to the center frequency of the band-pass filter, the deviation information detection step including at least the step of detecting the deviation direction, and the changing step of changing the center frequency of the band-pass filter on the basis of a detection result in the detection step of detecting the deviation information including the deviation direction, thereby adjusting the center frequency of the band-pass filter to coincide with the frequency of a signal to be filtered through the band-pass filter.
摘要翻译： 本发明的目的是提供一种频率跟踪方法，使用该方法的频率控制装置（跟踪装置）和使用该方法的多普勒速度计，其容易且快速地使带通滤波器的中心频率与 输入信号的频率即使当输入信号具有大的电平漂移时也是如此。 用于带通滤波器的中心频率的跟踪方法涉及一种方法，包括：偏差信息检测步骤，用于检测要输入到带通滤波器的信号的频率的偏差信息或从带通滤波器输出的信号， 相对于带通滤波器的中心频率的通过滤波器，偏差信息检测步骤至少包括检测偏差方向的步骤，以及基于带通滤波器的中心频率改变的改变步骤 在检测步骤中检测包括偏差方向的偏差信息，从而调节带通滤波器的中心频率与通过带通滤波器滤波的信号的频率一致的检测结果。
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公开(公告)号：US5552879A
公开(公告)日：1996-09-03
申请号：US285529
申请日：1994-08-04
申请人： Makoto Takamiya , Hidejiro Kadowaki , Yasuhiko Ishida , Jun Ashiwa , Shigeki Kato , Shinji Ueda
发明人： Makoto Takamiya , Hidejiro Kadowaki , Yasuhiko Ishida , Jun Ashiwa , Shigeki Kato , Shinji Ueda
CPC分类号： G01P3/366 , G01S17/58 , G01S7/4812 , G01S7/4917
摘要： A Doppler velocimeter includes an illuminating system for projecting a light beam for measurement onto an object to be measured at a predetermined working distance, and a light-receiving system for receiving light from the object illuminated with the light beam by the illuminating system. Information relating to a speed of the object is detected by a Doppler shift of the light received by the light-receiving system. The Doppler velocimeter further includes a changing device for changing the working distance of the illuminating system.
摘要翻译： 一种多普勒测速仪包括：用于将预定光束进行测量的光束以预定的工作距离投射到被测量物体上的照明系统;以及用于接收来自被照明系统照射的物体的光的光接收系统。 通过由受光系统接收的光的多普勒频移来检测与物体的速度有关的信息。 多普勒测速仪还包括用于改变照明系统的工作距离的改变装置。
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5.发明授权
公开(公告)号：US5483332A
公开(公告)日：1996-01-09
申请号：US419746
申请日：1995-04-10
CPC分类号： G01P3/366 , G01P5/26 , G01S17/58 , G01S7/4812
摘要： A doppler velocimeter determines the velocity of an object moving through a beam intersection area by using a doppler frequency obtained by detecting light from the beam intersecting area. The doppler velocimeter includes: a light source; a diffraction grating for diffracting light received from the light source; first and second lens systems for transmitting diffracted light from the diffraction grating to irradiate a portion of a movable object to be examined, the first and second lens systems having the same focal length F; and a detector device for receiving light from the portion of the object irradiated with the light which has been transmitted through the first and second lens systems and for obtaining a doppler signal used for velocity determination. The interval between the first and second lens systems is twice as long as the focal length F. Spherical aberration caused by a portion of the first lens system through which the diffracted light travels is offset by spherical aberration caused by a portion of the second lens system through which the diffracted light travels. This simple construction achieves equidistant interference fringes over the beam intersection area.
摘要翻译： 多普勒速度计通过使用通过检测来自光束相交区域的光获得的多普勒频率来确定移动通过光束交叉区域的物体的速度。 多普勒测速仪包括：光源; 用于衍射从光源接收的光的衍射光栅; 第一和第二透镜系统，用于从衍射光栅发射衍射光以照射待检查的可移动物体的一部分，第一和第二透镜系统具有相同的焦距F; 以及检测器装置，用于接收来自已经透过第一和第二透镜系统的光照射的物体的部分的光，并且用于获得用于速度确定的多普勒信号。 第一透镜系统和第二透镜系统之间的间隔是焦距F的两倍。由衍射光穿过的第一透镜系统的一部分引起的球面像差由第二透镜系统的一部分引起的球面像差 衍射光通过其传播。 这种简单的结构在光束交叉区域上实现了等距离的干涉条纹。
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公开(公告)号：US5179418A
公开(公告)日：1993-01-12
申请号：US703766
申请日：1991-05-21
摘要： This invention is characterized in that a light beam from a light source is made to enter a diffraction grating and .+-. nth-order (n=1,2, . . . ) diffracted lights from the diffraction grating are made to enter a moving object at an angle substantially equal to the angle of intersection of the angles of diffraction of the two diffracted lights from the diffraction grating. As a result, the two diffracted lights are converged by a lens system provided between the diffraction grating and the light source on the moving object and intersect with each other. Scattered light subjected to Doppler shift by the moving object is detected by photodetector thereby detecting the velocity information of the moving object.
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公开(公告)号：US5272512A
公开(公告)日：1993-12-21
申请号：US996852
申请日：1992-12-21
CPC分类号： G01S17/58
摘要： An apparatus for detecting velocity of an object, includes a light source for generating light having a wavelength .lambda., a light-transmission block for receiving the light from the light source, and guiding the light onto the object, and a photosensor for detecting the light from the object on which the light from the light-transmission block is incident. The light-transmission block is integrally constituted by a diffraction grating for diffracting the light from the light source to produce two diffraction lights, and an optical element for causing the two diffraction lights from the diffraction grating to be incident onto the object at a predetermined incident angle. The diffraction grating and the optical element are arranged so as to have substantially constant sin.theta./.lambda. independently of a change in wavelength .lambda. of the light from the light source where .theta. is the incident angle of each diffraction light onto the object. A velocity of the object is detected through detection by the photosensor.
摘要翻译： 一种用于检测物体的速度的装置包括用于产生具有波长λ的光的光源，用于接收来自光源的光并将光引导到物体上的光传输块，以及用于检测光的光传感器 来自光传输块的光入射的物体。 光传输块由衍射光栅一体地构成，用于衍射来自光源的光以产生两个衍射光，并且用于使来自衍射光栅的两个衍射光在预定事件处入射到物体上的光学元件 角度。 衍射光栅和光学元件被布置成独立于来自光源的光的波长λ的变化，具有基本恒定的sinθ/λ，其中θ是每个衍射光到物体上的入射角。 通过光传感器的检测来检测物体的速度。
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公开(公告)号：US5194745A
公开(公告)日：1993-03-16
申请号：US905147
申请日：1992-06-23
申请人： Makoto Takamiya , Yasuhiko Ishida , Hidejiro Kadowaki , Hiroshi Sugiyama , Ken Tsuchii , Kosuke Yamamoto
发明人： Makoto Takamiya , Yasuhiko Ishida , Hidejiro Kadowaki , Hiroshi Sugiyama , Ken Tsuchii , Kosuke Yamamoto
CPC分类号： G01S7/4811 , G01S17/58
摘要： An apparatus for detecting the velocity information of an object comprises the irradiation optical system for performing the irradiation of beam to the predetermined position on an object to be measured; the photodetector for detecting the light from the irradiated object by the irradiation optical system, the velocity information being obtained by the detection; the detector for detecting the irradiating state for detecting the deviation of the irradiating position of the beam on the object to be measured; and the adjuster for adjusting the irradiating state of the beam on the object based on the detection result of the detector for detecting the irradiating state. With such constituents as above, the apparatus is capable of dealing with the fluctuation of the lightning to obtain a high-precision detection of the velocity information at a high speed.
摘要翻译： 用于检测物体的速度信息的装置包括：用于对待测物体上的预定位置进行光束照射的照射光学系统; 用于通过照射光学系统检测来自照射物体的光的光电检测器，通过检测获得的速度信息; 检测器，用于检测用于检测光束在被测量物体上的照射位置的偏差的照射状态; 以及调节器，用于基于用于检测照射状态的检测器的检测结果来调节物体上的光束的照射状态。 利用这样的组成，该装置能够处理闪电的波动，以高速度获得对速度信息的高精度检测。
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9.发明授权Doppler velocimeter having a diffraction grating and dual lens groups with identical focal distances 失效具有衍射光栅的多普勒测速仪和具有相同焦距的双透镜组
公开(公告)号：US5256885A
公开(公告)日：1993-10-26
申请号：US997129
申请日：1992-12-24
CPC分类号： G01S17/58
摘要： An apparatus for detecting the velocity information of an object comprises a light source; optical system for irradiating beam from the light source, which is provided with a first lens or lens group and a second lens or lens group having an identical focal distance which are arranged apart from each other substantially two times such focal distance along the direction of the optical axis, to irradiate the beam onto the measuring object through the first and second lenses or lens group, and the optical system being arranged so as to make the value of sin .theta./.lambda. substantially constant where .theta. is the incident angle of the beam irradiated onto the measuring object and .lambda. is the wavelength of the beam; and detector for detecting the scattering rays of light from the measuring object irradiated by the above-mentioned optical system to detect the velocity information of the measuring object. With the constituents thus arranged, the apparatus is capable of effectively preventing the deviation of the intersecting position of the beams irradiated on the measuring object to perform a high-precision detection of the velocity information at all times.
摘要翻译： 用于检测物体的速度信息的装置包括光源; 用于照射来自光源的光束的光学系统，其具有第一透镜或透镜组以及具有相同焦距的第二透镜或透镜组，所述第二透镜或透镜组沿着 通过第一和第二透镜或透镜组将光束照射到测量对象上，并且光学系统被布置为使得sinθ/λ的值基本上恒定，其中θ是辐射束的入射角 到测量对象上，λ是光束的波长; 以及检测器，用于检测由上述光学系统照射的测量对象的光的散射光线，以检测测量对象的速度信息。 通过这样配置，能够有效地防止照射在测定对象上的光束的交叉位置的偏差始终进行速度信息的高精度检测。
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公开(公告)号：US5589858A
公开(公告)日：1996-12-31
申请号：US213998
申请日：1994-03-15
摘要： In an apparatus wherein a recording medium is conveyed by a conveying system with the front surface of the recording medium opposed to recording heads and information is recorded on the recording medium by liquid droplet jet, a first speed meter is provided on the back side of the recording medium and further, a second speed meter for detecting liquid droplet jet speed together with the first speed meter is provided at a predetermined location, whereby the recording position is adjusted. The first and second speed meters may preferably be optical Doppler velocimeters which will not cause any speed detection error with fluctuation of the wavelength of a light source.
摘要翻译： 在记录介质由记录介质的前表面与记录头相对并通过液滴喷射记录在记录介质上的传送系统传送的设备中，在第一速度计 记录介质，并且在预定位置处设置用于与第一速度计一起检测液滴喷射速度的第二速度计，由此调节记录位置。 第一和第二速度计可以优选地是光学多普勒测速仪，其不会由于光源的波长的波动而引起任何速度检测误差。
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