POSITIONAL CHANGE MEASUREMENT DEVICE, POSITIONAL CHANGE MEASUREMENT METHOD, AND IMAGE FORMING APPARATUS
    2.
    发明申请
    POSITIONAL CHANGE MEASUREMENT DEVICE, POSITIONAL CHANGE MEASUREMENT METHOD, AND IMAGE FORMING APPARATUS 有权
    位置变化测量装置,位置变化测量方法和图像形成装置

    公开(公告)号:US20140268180A1

    公开(公告)日:2014-09-18

    申请号:US14208621

    申请日:2014-03-13

    IPC分类号: G01B11/14

    摘要: An objective is to achieve a positional change measurement device which measures positional change of a dynamic measured surface by using speckle patterns while easily reducing influence of fluctuations in a measurement environment temperature. Provided is a positional change measurement device including: a light source; an illuminating optical system configured to guide light from the light source to a measured surface; an imaging optical system; an image pickup device configured to acquire a speckle pattern by receiving reflection light from the measured surface via the imaging optical system; and detected-length compensation means for compensating for fluctuations in a detected length caused by temperature fluctuations. Positional change of the measured surface is measured based on a result of cross-correlation computation performed on multiple speckle patterns acquired at predetermined time intervals.

    摘要翻译: 目的是实现利用散斑图案来测量动态测量表面的位置变化同时容易地减少测量环境温度波动的影响的位置变化测量装置。 提供一种位置变化测量装置,包括:光源; 照明光学系统,被配置为将来自所述光源的光引导到测量的表面; 成像光学系统; 被配置为通过经由所述成像光学系统从测量的表面接收反射光来获取散斑图案的图像拾取装置; 以及用于补偿由温度波动引起的检测长度的波动的检测长度补偿装置。 基于在以预定时间间隔获取的多个散斑图案上执行的互相关计算的结果来测量测量表面的位置变化。

    ROTATION ANGLE DETECTION APPARATUS
    3.
    发明申请
    ROTATION ANGLE DETECTION APPARATUS 有权
    旋转角度检测装置

    公开(公告)号:US20120232839A1

    公开(公告)日:2012-09-13

    申请号:US13408415

    申请日:2012-02-29

    申请人: Takeshi UEDA

    发明人: Takeshi UEDA

    IPC分类号: G01B7/30 G06F19/00

    CPC分类号: G01D5/24471 G01D5/2451

    摘要: A first third harmonic component removing portion calculates an approximate value (sin θ)n of a signal sin θ that is an output signal of a first magnetic sensor from which third harmonic components have been removed. A second third harmonic component removing portion calculates an approximate value (cos θ)n of a signal cos θ that is an output signal of a second magnetic sensor from which third harmonic components have been removed. A rotation angle calculation portion calculates a rotation angle θ of a rotor based on the approximate value (sin θ)n of sin θ, which has been calculated by the first third harmonic component removing portion and the approximate value (cos θ)n of cos θ, which has been calculated by the second third harmonic component removing portion.

    摘要翻译: 第一三次谐波分量去除部分计算信号sin& thetas的近似值(sin& tt;)n; 这是已经去除三次谐波分量的第一磁传感器的输出信号。 第二三次谐波分量去除部分计算信号cos& t的近似值(cos& t); n。 这是从其中去除三次谐波分量的第二磁传感器的输出信号。 旋转角度计算部分计算旋转角度和角度; 基于已经由第一三次谐波分量去除部分计算出的sin&thetas的近似值(sin& tt;)n和已经计算出的cos&Thetas的近似值(cos& t) 通过第二三次谐波分量去除部分。

    ROTATION ANGLE DETECTION DEVICE
    4.
    发明申请
    ROTATION ANGLE DETECTION DEVICE 审中-公开
    旋转角度检测装置

    公开(公告)号:US20120158341A1

    公开(公告)日:2012-06-21

    申请号:US13326724

    申请日:2011-12-15

    IPC分类号: G01B7/30 G06F19/00

    CPC分类号: G01D5/2451

    摘要: A rotation angle calculation unit calculates a zero-crossing time point when a zero-crossing is detected for an output signal V1 or an output signal V2. The rotation angle calculation unit calculates a time interval (zero-crossing interval) between the zero-crossing time point calculated this time for the output signal V1 or V2 for which the zero-crossing is detected and the zero-crossing time point calculated the last time for this output signal. The rotation angle calculation unit identifies the magnetic pole presently sensed by a magnetic sensor corresponding to the output signal for which the zero-crossing is detected, based on the calculated zero-crossing interval, the sum of zero-crossing intervals that is calculated last based on the output signals of the magnetic sensor over one turn of a rotor, the rotation direction of the rotor, and the content of an amplitude correction table (a first or second table) for the magnetic sensor.

    摘要翻译: 旋转角度计算单元计算检测到输出信号V1或输出信号V2的过零点时的过零时间点。 旋转角度计算单元计算此时计算出的输出信号V1或V2,检测过零点的V2与过去计算的过零点时刻之间的时间间隔(零交叉间隔) 该输出信号的时间。 旋转角计算单元基于所计算的过零间隔,基于最后计算的过零间隔的和来识别由与检测到过零点的输出信号相对应的磁传感器目前感测的磁极 在转子的一圈,磁性传感器的输出信号,转子的旋转方向以及磁传感器的振幅校正表(第一或第二表)的内容上。

    ROTATION ANGLE DETECTING DEVICE
    6.
    发明申请
    ROTATION ANGLE DETECTING DEVICE 有权
    旋转角度检测装置

    公开(公告)号:US20120182008A1

    公开(公告)日:2012-07-19

    申请号:US13336186

    申请日:2011-12-23

    IPC分类号: G01B7/30

    CPC分类号: G01D5/145

    摘要: Three magnetic sensors are arranged around a rotor at predetermined angular intervals about the rotation axis of the rotor. Sinusoidal signals that have a phase difference of a predetermined degree of 45° are output from the respective magnetic sensors. A rotation angle computing device detects a magnetic pole transition in a first output signal as follows. Specifically, the rotation angle computing device detects a magnetic pole transition in the first output signal based on a value having a larger absolute value between a current value of the second sinusoidal signal and a current value of the third sinusoidal signal, an immediately preceding value of the first sinusoidal signal and a current value of the first sinusoidal signal.

    摘要翻译: 围绕转子的旋转轴线以预定的角度间隔围绕转子设置三个磁性传感器。 从相应的磁传感器输出具有预定的45度相位差的正弦信号。 旋转角度计算装置如下检测第一输出信号中的磁极转变。 具体地说,旋转角计算装置基于第二正弦信号的电流值和第三正弦信号的电流值之间的绝对值较大的值,检测第一输出信号中的磁极转变, 第一正弦信号和第一正弦信号的电流值。

    ROTATION ANGLE DETECTION DEVICE
    7.
    发明申请
    ROTATION ANGLE DETECTION DEVICE 有权
    旋转角度检测装置

    公开(公告)号:US20120158340A1

    公开(公告)日:2012-06-21

    申请号:US13326701

    申请日:2011-12-15

    申请人: Takeshi UEDA

    发明人: Takeshi UEDA

    IPC分类号: G01B7/30 G06F19/00

    摘要: A rotation angle calculation unit includes a first rotation angle calculation portion, a second rotation angle calculation portion, a third rotation angle calculation portion, an abnormality monitoring portion, and a final rotation angle calculation portion. The abnormality monitoring portion determines, based on a first output signal, a second output signal, and a third output signal, whether the first to third output signals are each normal or abnormal. The final rotation angle calculation portion calculates a final rotation angle based on the final determination result obtained by the abnormality monitoring portion and the first to third rotation angles calculated by the first to third rotation angle calculation portions, respectively.

    摘要翻译: 旋转角度计算单元包括第一旋转角度计算部分,第二旋转角度计算部分,第三旋转角度计算部分,异常监视部分和最终旋转角度计算部分。 异常监视部分基于第一输出信号确定第二输出信号和第三输出信号,第一至第三输出信号是否正常或异常。 最终旋转角度计算部分基于由异常监视部分获得的最终确定结果和由第一至第三旋转角度计算部分计算的第一至第三旋转角度分别计算最终旋转角度。

    MOVING-MEMBER DETECTING DEVICE AND IMAGE FORMING APPARATUS
    9.
    发明申请
    MOVING-MEMBER DETECTING DEVICE AND IMAGE FORMING APPARATUS 有权
    移动构件检测装置和图像形成装置

    公开(公告)号:US20140044460A1

    公开(公告)日:2014-02-13

    申请号:US13957926

    申请日:2013-08-02

    IPC分类号: G03G15/01

    摘要: A moving-member detecting device includes an image acquiring unit and a speed calculating unit. The image acquiring unit includes a light source configured to emit a light beam to a detecting position of a moving member; an area sensor configured to acquire image data of a one- or two-dimensional image; and an area-sensor control unit configured to acquire the image data. The image acquiring unit is configured to acquire pieces of image data of the moving member at first and second positions, respectively, in a moving direction of the moving member so as to acquire the piece of position image data for the second position when the moving member is at the second position after acquiring the piece of image data for the first position. The speed calculating unit is configured to calculate a moving speed of the moving member from the pieces of image data.

    摘要翻译: 移动构件检测装置包括图像获取单元和速度计算单元。 图像获取单元包括被配置为将光束发射到移动构件的检测位置的光源; 区域传感器,被配置为获取一维或二维图像的图像数据; 以及被配置为获取图像数据的区域传感器控制单元。 图像获取单元被配置为在移动部件的移动方向上分别在第一位置和第二位置获取移动部件的图像数据,以便当移动部件移动时获取第二位置的位置图像数据 在获取第一位置的图像数据之后处于第二位置。 速度计算单元被配置为从多条图像数据计算移动构件的移动速度。

    ROTATION ANGLE DETECTING DEVICE
    10.
    发明申请
    ROTATION ANGLE DETECTING DEVICE 有权
    旋转角度检测装置

    公开(公告)号:US20120182009A1

    公开(公告)日:2012-07-19

    申请号:US13336206

    申请日:2011-12-23

    申请人: Takeshi UEDA

    发明人: Takeshi UEDA

    IPC分类号: G01B7/30

    CPC分类号: G01D5/145

    摘要: Three magnetic sensors are arranged around a rotor at predetermined angular intervals about the rotation axis of the rotor. Sinusoidal signals having a phase difference of 120° are output from the magnetic sensors. A rotation angle computing device detects a magnetic pole transition in a first output signal as follows. The rotation angle computing device detects a magnetic pole transition in the first output signal based on a current value of one of the second and third sinusoidal signals, an absolute value of a difference between an immediately preceding value and the current value of the one of the second and third sinusoidal signals being larger than an absolute value of a difference between an immediately preceding value and the current value of the other of the second and third sinusoidal signals, an immediately preceding value of the first sinusoidal signal and a current value of the first sinusoidal signal.

    摘要翻译: 围绕转子的旋转轴线以预定的角度间隔围绕转子设置三个磁性传感器。 从磁传感器输出相位差为120°的正弦信号。 旋转角度计算装置如下检测第一输出信号中的磁极转变。 旋转角度计算装置基于第二和第三正弦信号中的一个的当前值,检测第一输出信号中的磁极转变,其中前一个值之间的差和当前值之间的差的绝对值 第二和第三正弦信号大于紧接在前的值与第二和第三正弦信号中的另一个的当前值之间的差的绝对值,第一正弦信号的先前值和第一正弦信号的当前值 正弦信号。