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21. 发明专利

DE19643771A1 Correcting signals for coder by production of simulated sine wave signals 未知
公开(公告)号：DE19643771A1
公开(公告)日：1997-10-02
申请号：DE19643771
申请日：1996-10-23
申请人： MITSUBISHI ELECTRIC CORP
发明人： SAKUMA HIROKAZU
IPC分类号： G01D5/245 , G01D5/244 , G01D5/36 , G01D3/02 , G01D3/032
摘要： The method is carried out in the following steps. The amplitude of the simulated sine wave signals is determined, from a difference between the maximum value and the minimum value of the simulated signal. An optimum reference voltage for the A-D converter or an optimum amplification factor and an optimum reference voltage for an amplifier, are established for simulated sine wave signals corresponding to this amplitude. Also the setting of a reference voltage for the A-D converter or an amplification factor and a reference voltage for the amplification corresponding to this optimum value. The method is carried out using a system, including a signal detection system (1), signal amplifiers (1,10,11), A-D converters (3,7,12), signal amplifiers (5,6), an input circuit (8), an amplitude value computing system (9) and an output circuit (13).

22. 发明专利

DE4410955C2 未知
公开(公告)号：DE4410955C2
公开(公告)日：1996-06-05
申请号：DE4410955
申请日：1994-03-29
申请人： MITSUBISHI ELECTRIC CORP
发明人： AOKI YUKIO , MIZUTANI TAKAO , KAZAMA TSUTOMU , KACHI MITSUYASU , YOKOI TADAKATSU , SAKUMA HIROKAZU
IPC分类号： G01D5/245 , G01D5/244 , G01D5/249 , G01D5/36 , H03M1/00 , H03M1/10 , H03M1/26 , H03M1/22 , G01B11/00 , G01B11/26
摘要： The position of a machine tool or the like is accurately obtained by an absolute value encoder. Light emission elements emit light which passes through scales containing optical patterns and is detected by light receiving elements. First, a signal detected by the light receiving elements while the light emission elements are extinguished is stored in memory. Then, the light emission elements are lighted and the signal detected by the light receiving elements is corrected by the previously stored signal.

23. 发明公开

EP1076226A4 ABSOLUTE VALUE ENCODER 有权
标题翻译： ABSOLUTER WERKKODIERER
公开(公告)号：EP1076226A4
公开(公告)日：2002-01-02
申请号：EP99906520
申请日：1999-02-26
申请人： MITSUBISHI ELECTRIC CORP
发明人： SAKUMA HIROKAZU , OKAMURO TAKASHI , OHMURA YOICHI , AOKI YUKIO , SATONE TOSHIKAZU
IPC分类号： G01P3/486 , G01P3/489 , G01P13/04 , G01D5/36 , G01B11/26 , G01B21/22 , G01D5/245 , G01P13/00
CPC分类号： G01P3/486 , G01P3/489 , G01P13/045
摘要： An absolute value encoder for sensing the number of revolutions, wherein an A-phase/B-phase generating section (610) generates A-phase/B-phase one-period pulse signals the phases of which are 90 degrees different from each other within one revolution of the shaft on the basis of the light passing through a slit rotating together with the shaft. When an A-phase/B-phase status sensing section (640) senses a change of the pulse signals, a clock generating section (66) switches the clock frequency.
摘要翻译：一种绝对值编码器，用于检测转数，其中A相/ B相产生部分（610）产生A相/ B相一个周期的脉冲信号，其相位彼此相差90度基于通过与轴一起旋转的狭缝的光的光轴的一次旋转。当A相/ B相状态感测部分（640）感测到脉冲信号的改变时，时钟生成部分（66）切换时钟频率。

24. 发明公开

EP1016849A4 LENGTH MEASURING INSTRUMENT 失效
标题翻译：长度测量仪
公开(公告)号：EP1016849A4
公开(公告)日：2000-10-04
申请号：EP97932993
申请日：1997-07-23
申请人： MITSUBISHI ELECTRIC CORP
发明人： SAKUMA HIROKAZU , OKAMURO TAKASHI , SATO YOSHIMITSU , NAKASHIMA TOSHIRO , NAKAJIMA HAJIME
IPC分类号： G01B9/02 , G01B11/00
CPC分类号： G01B9/0207 , G01B9/02002 , G01B2290/45
摘要： A length measuring instrument is provided with a light emitting section which emits a laser beam having a frequency f, an interference system which generates and emits a reference beam having a frequency f+f1 in a straight line and a detection beam having a frequency f+f2 at a prescribed inclination angle upon receiving the laser beam, a movement detecting section which reflects the reference and detection beams toward the interference system, a light receiving section which converts a reference interference wave generated by the interference system into a first sine-wave electric signal and a detection interference wave produced by the difference in optical path length between the reflected reference and detection beams into a second sine-wave electric signal, a signal processing section which respectively generates first and second cosine-wave signals from the first and second sine-wave signals and A/D-converts the four signals, and an arithmetic section which finds the electrical angle of the reference interference wave, the electrical angle of the detection interference wave and the phase difference between the reference and detection interference waves from the two electrical angles, and determines the position of the moving detecting section based on the phase difference and the wavelength of the laser beam.

25. 发明专利

DE112006002928T5 未知
公开(公告)号：DE112006002928T5
公开(公告)日：2008-10-09
申请号：DE112006002928
申请日：2006-11-09
申请人： MITSUBISHI ELECTRIC CORP
发明人： SUGIE HIROSHI , SAKUMA HIROKAZU , OKAMURO TAKASHI
IPC分类号： G01D5/244
摘要： A position detection error correcting method that corrects position detection errors using a limited storage capacity, by calculating position detection error correction values by four simple arithmetic operations at startup to reduce a startup time delay and consumption of a storage capacity even when a portion containing steep error variations exists. Detection error correction values of a position detector are expressed by a correction function using a periodic function, and correction parameters of the correction values are stored in advance in a non-volatile memory. At startup, these correction parameters are read out, and a position detection error correction value corresponding to each detected position is calculated and stored in a random access memory. The output position detection error correction value detector corresponding to each detected position is read out from the random access memory and a corrected detected position value corrected for the detected position value error is calculated.

26. 发明专利

DE10325082B4 未知
公开(公告)号：DE10325082B4
公开(公告)日：2008-04-30
申请号：DE10325082
申请日：2003-06-03
申请人： MITSUBISHI ELECTRIC CORP
发明人： OHMURA YOICHI , OKA TORU , NAKASHIMA TOSHIRO , NAKAJIMA HAJIME , SAKUMA HIROKAZU , OKAMURO TAKASHI , SAKAMOTO MASAHIKO , SUGIMOTO KOICHI
IPC分类号： G01B11/26 , G01B11/02 , G01D5/244 , G01D5/34
摘要： A photoelectric rotary encoder includes a light source that emits a light beam, a returning section that returns the emitted light beam to a direction opposite to an emitting direction of the beam, and a photodetector that is disposed on a substrate on which the light source is disposed and that detects the returned light beam via a disk having a detection pattern section. The photoelectric rotary encoder detects rotational displacement of the disk based on the detected returned light beam. In this photoelectric rotary encoder, an optical element that lets a stray beam component of the light beam from the light source escape via a side surface of the optical element, is disposed in front of the substrate on which the light source and the photodetector are disposed. The optical element covers the substrate and integrates the optical element and the substrate.

27. 发明专利

DE69934776T2 未知
公开(公告)号：DE69934776T2
公开(公告)日：2007-10-11
申请号：DE69934776
申请日：1999-03-05
申请人： MITSUBISHI ELECTRIC CORP
发明人： OKAMURO TAKASHI , SAKUMA HIROKAZU , OHMURA YOICHI
IPC分类号： G01D5/245 , G01D5/244

28. 发明专利

DE69933927T2 未知
公开(公告)号：DE69933927T2
公开(公告)日：2007-07-12
申请号：DE69933927
申请日：1999-02-26
申请人： MITSUBISHI ELECTRIC CORP
发明人： SAKUMA HIROKAZU , OKAMURO TAKASHI , OHMURA YOICHI , AOKI YUKIO , SATONE TOSHIKAZU
IPC分类号： G01D5/36 , G01B11/26 , G01B21/22 , G01D5/245 , G01P3/486 , G01P3/489 , G01P13/00 , G01P13/04

29. 发明专利

DE102004004634A1 Photoelectric encoder has a multiplicity of groups of light receiver elements for generation of phase signals with predefined phase differences with pairs of groups arranged to provide an overlap between themselves 未知
公开(公告)号：DE102004004634A1
公开(公告)日：2004-08-19
申请号：DE102004004634
申请日：2004-01-29
申请人： MITSUBISHI ELECTRIC CORP
发明人： OHUMARA YOICHI , OKA TORU , NAKAJIMA HAJIME , SAKUMA HIROKAZU , OKAMURO TAKASHI
IPC分类号： G01D5/347 , H03M1/06 , H03M1/30 , H03M1/22
摘要： Photoelectric encoder has a scale (104) that generates a periodic light intensity pattern of a given period when illuminated with a light source (102). A multiplicity of groups of light receiver elements can be displaced relative to the scale in order to generate phase signals with predefined phase differences. A multiplicity of light receiver elements are placed next to each other so that the same phase if formed by each group of receivers. Surface centroids are formed on a phase axis (109) of a pair of groups of receivers with a predetermined phase difference so that they overlap.

30. 发明专利

GB2286679A Absolute position detection apparatus and error compensation methods therefor 未知
公开(公告)号：GB2286679A
公开(公告)日：1995-08-23
申请号：GB9501684
申请日：1995-01-27
申请人： MITSUBISHI ELECTRIC CORP
发明人： KACHI MITSUYASU , SAKUMA HIROKAZU , KAZAMA TSUTOMU , AOKI YUKIO , MIZUTANI TAKAO
IPC分类号： G01D5/244 , G01D5/245 , H03M1/64
摘要： An absolute position detection apparatus comprises sine and cosine wave generators 1, 2, for generating one or more sets of sine and cosine waves within a cycle, analog-to-digital converters 5 for converting the sine and cosine waves into digital values, and an arithmetic unit 101 for calculating compensation for errors of offset, amplitude and phase on the basis of the digital values from the analog-to-digital converters. The arithmetic unit operates on a phase angle from phase angles found by the arithmetic performed prior to or during said error compensations and the digital values from the analog-to-digital converters, whereby a low-priced, highly reliable absolute position detection apparatus can be achieved without the addition of compensation circuits to the hardware.

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