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公开(公告)号：US10551224B2
公开(公告)日：2020-02-04
申请号：US15820525
申请日：2017-11-22
Applicant: MITUTOYO CORPORATION
Inventor： Hirokazu Kobayashi , Osamu Kawatoko
Abstract: An encoder includes a light source. A booster circuit boosts a power supply voltage output by a battery, and outputs the boosted voltage. The voltage is applied to one end of a light-emitting diode. A driver circuit is inserted between another end of the light-emitting diode and a ground, the driver circuit controlling current flowing through the light-emitting diode. A voltage detector circuit detects a voltage between the light-emitting diode and the driver circuit. A control circuit causes the booster circuit to boost the power supply voltage when the voltage is lower than the power supply voltage; stops the boosting performed by the booster circuit when the voltage is equal to the power supply voltage; and controls the driver circuit such that, after the voltage reaches a predetermined value, current flows to the light-emitting diode.
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公开(公告)号：US20170176220A1
公开(公告)日：2017-06-22
申请号：US15372578
申请日：2016-12-08
Applicant: Mitutoyo Corporation
Inventor： Hirokazu Kobayashi
IPC: G01D5/347
CPC classification number: G01D5/34776 , G01D5/34715
Abstract: There is provided a photoelectric encoder that can deconcentrate a calculation load in a photoelectric ABS encoder, and reduce power consumption.A photoelectric encoder includes light receiving units 6 configured to output a plurality of photocurrent signals obtained by receiving light emitted from a light emission unit 5, via a scale SC, a signal conversion unit 10 configured to output a conversion signal by converting the plurality of photocurrent signals, a position calculation unit 20 configured to calculate an absolute position based on the conversion signal, and a microcomputer 3 configured to perform drive control of the light emission unit 5, the signal conversion unit 10, and the position calculation unit 20. The microcomputer 3 intermittently drives at least either one of the light emission unit 5 and the signal conversion unit 10, and causes the position calculation unit 20 to execute calculation according to a timing of intermit driving.
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公开(公告)号：US20140151539A1
公开(公告)日：2014-06-05
申请号：US14093744
申请日：2013-12-02
Applicant: MITUTOYO CORPORATION
Inventor： Osamu Kawatoko , Hirokazu Kobayashi
IPC: G01D5/347
CPC classification number: G01D5/34715 , G01D5/24485 , G01D5/34792
Abstract: In a photoelectric absolute encoder including a scale having a plurality of tracks with different pitch patterns, and a detector having a light source and light receiving elements including a plurality of light receiving element arrays corresponding to the plurality of tracks, a light receiving element array is additionally arranged at a position in the detector corresponding to a boundary between the track having a pattern with a wide pitch and the track having a pattern with a narrow pitch adjacent to each other in the scale, and displacement of the detector relative to the scale in a lateral direction is detected from a signal amplitude of the added light receiving element array. In this manner, displacement of the detector relative to the scale in the lateral direction can be detected.
Abstract translation: 在包括具有不同节距图案的多个轨道的刻度的光电绝对编码器和具有光源的检测器和包括与多个轨道相对应的多个光接收元件阵列的光接收元件中，光接收元件阵列是 另外布置在检测器中对应于具有宽间距的图案的轨道之间的边界处的检测器中的位置，并且轨道具有在刻度中彼此相邻的窄间距的图案，并且检测器相对于标尺的位移 从所添加的光接收元件阵列的信号幅度检测横向。 以这种方式，可以检测检测器相对于横向上的刻度的位移。
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14.发明授权公开(公告)号：US09121734B2
公开(公告)日：2015-09-01
申请号：US14093744
申请日：2013-12-02
Applicant: MITUTOYO CORPORATION
Inventor： Osamu Kawatoko , Hirokazu Kobayashi
CPC classification number: G01D5/34715 , G01D5/24485 , G01D5/34792
Abstract: In a photoelectric absolute encoder including a scale having a plurality of tracks with different pitch patterns, and a detector having a light source and light receiving elements including a plurality of light receiving element arrays corresponding to the plurality of tracks, a light receiving element array is additionally arranged at a position in the detector corresponding to a boundary between the track having a pattern with a wide pitch and the track having a pattern with a narrow pitch adjacent to each other in the scale, and displacement of the detector relative to the scale in a lateral direction is detected from a signal amplitude of the added light receiving element array. In this manner, displacement of the detector relative to the scale in the lateral direction can be detected.
Abstract translation: 在包括具有不同节距图案的多个轨道的刻度的光电绝对编码器和具有光源的检测器和包括与多个轨道相对应的多个光接收元件阵列的光接收元件中，光接收元件阵列是 另外布置在检测器中对应于具有宽间距的图案的轨道之间的边界处的检测器中的位置，并且轨道具有在刻度中彼此相邻的窄间距的图案，并且检测器相对于标尺的位移 从所添加的光接收元件阵列的信号幅度检测横向。 以这种方式，可以检测检测器相对于横向上的刻度的位移。
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