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1.发明授权Device having signal interpolation circuit and displacement measuring apparatus comprising the device 失效具有信号插值电路的装置和包括该装置的位移测量装置
公开(公告)号：US5067089A
公开(公告)日：1991-11-19
申请号：US419705
申请日：1989-10-11
CPC分类号： G01D5/24404 , H03M1/645
摘要： A device comprises output device for receiving signals having predetermined phases and outputting first and second signals having different phase angles and amplitudes, conversion device for converting the first signal into a first binary signal and the second signal into a second binary signal, the conversion device being arranged so that widths of the first and second binary signals are substantially equal to each other regardless of a difference in amplitude of the first and second signals, and generating device for generating first and second pulses according to phase angles on the basis of the first and second binary signals.
摘要翻译： 一种设备包括用于接收具有预定相位的信号的输出装置，并且输出具有不同相位角和幅度的第一和第二信号，用于将第一信号转换为第一二进制信号的转换装置和第二信号转换为第二二进制信号，转换装置 布置成使得第一和第二二进制信号的宽度彼此基本相等，而与第一和第二信号的幅度差无关，以及用于根据第一和第二信号的相位角产生第一和第二脉冲的产生装置， 第二个二进制信号。
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公开(公告)号：US5000542A
公开(公告)日：1991-03-19
申请号：US346701
申请日：1989-05-03
IPC分类号： G01D5/38
CPC分类号： G01D5/38
摘要： In an optical type encoder for projecting a light beam onto an optical type scale having a diffraction grating formed thereon, forming an interferenced light by the use of a diffracted light from the scale, and photoelectrically converting the interferenced light to thereby measure the displacement of the scale, first and second light beams are caused to enter substantially the same position on the scale from different first and second directions, first and second diffracted light beams emerging from the scale by the first and second light beams being diffracted by the scale are directed to the aforementioned position by a reflecting device, the diffracted light beams emerging in the first and second directions by the first and second diffracted light beams being diffracted by the scale are superposed one upon the other to thereby form an interferenced light, and light components created by the first and second light beams being regularly reflected at the aforementioned position are not included in the interferenced light.
摘要翻译： 在用于将光束投射到其上形成有衍射光栅的光学刻度尺的光学型编码器中，通过使用来自刻度的衍射光形成介入光，并对该干涉光进行光电转换，从而测量 使第一和第二光束在不同的第一和第二方向上在刻度上进入基本上相同的位置，第一和第二光束通过刻度被衍射的第一和第二衍射光束被引导到 通过反射装置的上述位置，由第一和第二方向由第一和第二衍射光束以标尺衍射的第一和第二方向的衍射光束彼此重叠，从而形成介入光，并且由 在上述位置规则地反射的第一和第二光束为No t包含在干涉光中。
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公开(公告)号：US4933673A
公开(公告)日：1990-06-12
申请号：US171435
申请日：1988-03-21
摘要： An encoder for detecting the state of movement of a scale having a plurality of tracks consisting of arranged predetermined codes comprises first detecting device for reading the codes of the plurality of tracks and detecting data comprising a row of the codes, and second detecting device for detecting the state of movement of the codes of a particular track plurality of tracks to obtain more detailed data. The state of movement of the scale is detected on the basis of the signals from the first and second detecting devices.
摘要翻译： 一种用于检测具有由布置的预定代码组成的多个轨道的标尺的移动状态的编码器，包括用于读取多个轨道的代码和检测包括代码行的数据的第一检测装置和用于检测的第二检测装置 特定轨道多个轨道的代码的移动状态以获得更详细的数据。 基于来自第一和第二检测装置的信号检测标尺的移动状态。
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4.发明授权Optical type encoder including diffraction grating for producing interference fringes that are processed to measure displacement 失效光学型编码器包括用于产生被处理以测量位移的干涉条纹的衍射光栅
公开(公告)号：US4912320A
公开(公告)日：1990-03-27
申请号：US321155
申请日：1989-03-09
IPC分类号： G01D5/38
CPC分类号： G01D5/38
摘要： An optical type encoder comprises a light source for supplying a light beam for illuminating a diffraction grating formed on a movable scale, photoelectric converting means for photoelectrically converting interference fringes formed by causing a plurality of diffracted lights created by the diffraction grating to interfere with one another to measure the displacement of the movable scale and outputting a predetermined signal, detecting means for receiving a predetermined diffracted light created by the diffraction grating and detecting any fluctuation of the intensity thereof, and control means for modulating the intensity of the light beam illuminating the diffraction grating, on the basis of a signal from the detecting means, so that the amplitude of the output signal from the photoelectric converting means may become substantially constant.
摘要翻译： 一种光学型编码器包括用于提供用于照射形成在可移动刻度上的衍射光栅的光束的光源，用于光电转换由衍射光栅产生的多个衍射光形成的干涉条纹相互干扰的光电转换装置 测量可移动刻度的位移并输出预定信号;检测装置，用于接收由衍射光栅产生的预定衍射光并检测其强度的波动;以及控制装置，用于调制照射衍射的光束的强度 基于来自检测装置的信号，使得来自光电转换装置的输出信号的幅度变得基本恒定。
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公开(公告)号：US5066130A
公开(公告)日：1991-11-19
申请号：US347397
申请日：1989-05-04
IPC分类号： G01D5/38
CPC分类号： G01D5/38
摘要： A displacement measuring apparatus comprises a scale relatively displaced to an irradiating beam, a reading head to read the scale by the irradiating beam, and control device to control the apparatus for avoiding substantially the leakage of the irradiating beam out of the apparatus in response to the positional error of the scale and the irradiating beam.
摘要翻译： 位移测量装置包括与照射光束相对位移的标尺，用于通过照射光束读取标尺的读取头以及控制装置，用于控制装置，以便基本上避免照射光束从设备中泄漏出来，以响应于 刻度和照射光束的位置误差。
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公开(公告)号：US5051579A
公开(公告)日：1991-09-24
申请号：US532108
申请日：1990-06-01
IPC分类号： G01D5/38
CPC分类号： G01D5/38
摘要： An encoder for measuring movement of an optical scale by photoelectrically converting light from the optical scale obtained by applying light from a light source to the optical scale, by means of light receiving element, includes detector for detecting a variation in intensity of the light received by the light receiving element and a comparator for comparing a signal from the detector with a predetermined reference signal. Consequently, a predetermined alarm signal is generated on the basis of the result of comparison obtained from the comparator. A measuring system for detecting a moving condition of an object, includes an optical scale connected to the object; a light source for applying light to the optical scale; a first detector for receiving light from the optical scale and for detecting the moving condition of the object; a second detector for detecting a variation in intensity of the light received by the first detector; and a signal forming device for forming a predetermined alarm signal on the basis of an output signal from the second detector.
摘要翻译： 一种编码器，用于通过光电转换由光源将光从光源施加到光刻尺上的光通过光接收元件测量光标的移动，包括用于检测由光接收元件接收的光的强度变化的检测器 光接收元件和用于将来自检测器的信号与预定参考信号进行比较的比较器。 因此，基于从比较器获得的比较结果来生成预定的报警信号。 用于检测物体的移动状态的测量系统包括连接到物体的光学刻度; 用于将光施加到光学刻度的光源; 第一检测器，用于接收来自光刻尺的光并检测物体的移动状态; 第二检测器，用于检测由第一检测器接收的光的强度变化; 以及信号形成装置，用于根据来自第二检测器的输出信号形成预定报警信号。
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7.发明授权
公开(公告)号：US5038491A
公开(公告)日：1991-08-13
申请号：US369862
申请日：1989-06-22
CPC分类号： G01D5/24442 , G01D5/24476 , G01D5/347
摘要： A scale, for measuring the displacement of an object to be examined, has a division and a mark for alignment of the division, and a displacement measuring apparatus, for measuring the displacement of a scale, has a device for reading the division of the scale and a detector for detecting the positional error of the division relative to the direction of the displacement.
摘要翻译： 用于测量待检测物体的位移的刻度具有划分的划分和标记，并且用于测量刻度的位移的位移测量装置具有用于读取刻度的分割的装置 以及用于检测相对于位移方向的分割的位置误差的检测器。
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公开(公告)号：US5021649A
公开(公告)日：1991-06-04
申请号：US496259
申请日：1990-03-20
IPC分类号： G01D5/38
CPC分类号： G01D5/38
摘要： An encoder of this invention radiates a light beam onto an optical scale, in which a reflection film is formed on a surface of a relief type diffraction grating formed on one surface of a light-transmission substrate, from a surface opposite to the formation surface of the diffraction grating, and detects a change in intensity of interference light caused by diffracted light produced by the diffraction grating, thereby measuring a displacement of the optical scale.
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公开(公告)号：US4979826A
公开(公告)日：1990-12-25
申请号：US380038
申请日：1989-07-14
IPC分类号： G01D5/38
CPC分类号： G01D5/38
摘要： A displacement measuring apparatus has an illuminating device for illuminating a diffraction grating with a radiation beam, an optical system for directing first and second diffracted beams created by the diffraction grating with to the diffraction grating, the optical system being provided so that the first and second diffracted beams have a common optical path and travel in opposite directions along the optical path. In addition, a device receives an interference beam formed by first and second re-diffracted beams created by the first and second diffracted beams being diffracted by the diffraction grating, and outputs a signal conforming to the displacement of the diffraction grating relative to the radiation beam.
摘要翻译： 位移测量装置具有用于用辐射束照射衍射光栅的照明装置，用于将由衍射光栅产生的第一和第二衍射光束引导到衍射光栅的光学系统，所述光学系统被设置成使得第一和第二 衍射光束具有公共光路并沿着光路在相反方向上行进。 此外，设备接收由由衍射光栅衍射的第一和第二衍射光束产生的第一和第二重衍射光束形成的干涉光束，并且输出符合衍射光栅相对于辐射束的位移的信号 。
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10.发明授权Method and apparatus for detecting a reference position of a rotating scale with two sensors 失效用两个传感器检测旋转刻度尺的参考位置的方法和装置
公开(公告)号：US5026985A
公开(公告)日：1991-06-25
申请号：US409796
申请日：1989-09-20
IPC分类号： G01D5/36
CPC分类号： G01D5/36
摘要： In the reference-position detection method and apparatus for detecting a reference position of a scale, first and second patterns are disposed on the scale so that respective detection timings shift inversely to each other in response to a deviation in attitude of the scale. The first and second patterns are detected with timings different from each other by corresponding first and second sensors, and the reference position of the scale is determined according to outputs of respective sensors. Hence, even if the attitude of the scale changes from a predetermined attitude due to an inclination of the scale or a deviation in position of the scale, it is possible to exactly detect the reference position of the scale. Accordingly, it becomes also possible to increase the performance of a displacement measuring apparatus.
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