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    • 7. 发明专利
    • Distance measurement device and distance measurement system
    • 距离测量装置和距离测量系统
    • JP2013224931A
    • 2013-10-31
    • JP2013055961
    • 2013-03-19
    • Semiconductor Energy Lab Co Ltd株式会社半導体エネルギー研究所
    • KUROKAWA YOSHIMOTO
    • G01S17/10G01C3/06
    • G01C3/08G01S7/4816G01S7/4861G01S17/08G01S17/10G01S17/102G01S17/105G01S17/107G01S17/32G01S17/325G01S17/36G01S17/89H01L31/02
    • PROBLEM TO BE SOLVED: To provide a distance measurement device with high detection accuracy.SOLUTION: The distance measurement device includes: a photosensor including a light-receiving element, a first transistor, and a second transistor; wiring; a signal line; and a power supply line. The wiring is electrically connected to one electrode of the light-receiving element. The signal line is electrically connected to a gate electrode of the first transistor. The power supply line is electrically connected to one of a source electrode and a drain electrode of the second transistor. One of a source electrode and a drain electrode of the first transistor is electrically connected to a gate electrode of the second transistor. The other of the source electrode and the drain electrode of the first transistor is electrically connected to the other electrode of the light-receiving element and the other of the source electrode and the drain electrode of the second transistor.
    • 要解决的问题:提供具有高检测精度的距离测量装置。解决方案:距离测量装置包括:光传感器,包括光接收元件,第一晶体管和第二晶体管; 接线; 信号线 和电源线。 布线电连接到光接收元件的一个电极。 信号线电连接到第一晶体管的栅电极。 电源线与第二晶体管的源电极和漏电极中的一个电连接。 第一晶体管的源电极和漏电极之一电连接到第二晶体管的栅电极。 第一晶体管的源电极和漏电极中的另一个电连接到第二晶体管的光接收元件的另一个电极和源电极和漏电极中的另一个。
    • 9. 发明专利
    • Counting device, physical quantity sensor, counting method, and physical quantity measuring method
    • 计数装置,物理量传感器,计数方法和物理量测量方法
    • JP2011007722A
    • 2011-01-13
    • JP2009153487
    • 2009-06-29
    • Yamatake Corp株式会社山武
    • UENO TATSUYA
    • G01S17/32G01B9/02
    • G01S17/325G01D5/266G01R23/16
    • PROBLEM TO BE SOLVED: To correct a counting error in relation to a counting device, a physical quantity sensor, a counting method, and a physical quantity measuring method.SOLUTION: A tension/speed measuring device includes a laser driver 4 for oscillating a semiconductor laser 1, and the counting device 7 for counting interference waveforms included in output of a photodiode 2 for converting output from the semiconductor laser 1 into an electric signal. The counting device 7 measures a period of the interference waveform during a counting term, generates a frequency distribution of the period of the interference waveform during the counting term from the measurement result, adopts a class value wherein a product of the class value and a frequency becomes maximum as a representative value T0 of the period of the interference waveform from the frequency distribution, determines the sum total Ns of the frequency of a class which is below a half time of the representative value T0 and the sum total Nwof the frequency of a class which is over (n+0.5) times and below (n+1.5) times of the representative value T0 (n is a natural number of one or larger), and corrects a counting result based on the frequencies Ns and Nw.
    • 要解决的问题:相对于计数装置,物理量传感器,计数方法和物理量测量方法来校正计数误差。解决方案:张力/速度测量装置包括用于振荡半导体的激光驱动器4 激光器1和计数装置7,用于对包括在用于将半导体激光器1的输出转换为电信号的光电二极管2的输出中包括的干扰波形进行计数。 计数装置7测量计数项期间的干扰波形的周期,从测量结果生成计数项期间的干扰波形的周期的频率分布,采用类别值,其中类值和频率的乘积 作为来自频率分布的干扰波形的周期的代表值T0变为最大,确定低于代表值T0的一半时间的类别的频率的总和Ns和总和的Nwo 代表值T0(n + 0.5)倍(n + 0.5)倍(n + 1.5)倍的等级(n是1或更大的自然数),并且根据频率Ns和Nw来校正计数结果。
    • 10. 发明专利
    • Measuring apparatus
    • 测量装置
    • JP2010068999A
    • 2010-04-02
    • JP2008239445
    • 2008-09-18
    • Fuji Xerox Co Ltd富士ゼロックス株式会社
    • KONO KATSUNORINISHIHARA YOSHIOKUWATA YASUAKI
    • A61B5/026A61B5/0285G01P5/00
    • A61B5/0261A61B5/0059G01P3/36G01P5/26G01S17/325G01S17/58
    • PROBLEM TO BE SOLVED: To provide a measuring apparatus that uses the self-coupling effect of the semiconductor laser for readily and accurately measures a change in the state of an object to be measured. SOLUTION: A blood flow sensor includes: a semiconductor laser device that emits a laser light beam to an object to be measured; a driving unit 120 that provides a driving signal for modulation drive of the semiconductor laser device; a beat signal detection portion 132 that detects a first electrical signal that corresponds to the intensity of the laser light beam modulated due to the self-coupling effect, in a first half-cycle of the driving signal, and that detects a second electrical signal that corresponds to the intensity of a second laser light beam modulated due to the self-coupling effect, in a second half-cycle of the driving signal being in a phase opposite to that of the first half-cycle; a difference calculation circuit 136 that calculates a difference between the first and second electrical signals; and a measuring circuit 138 that measures the change in the state of the object to be measured based on the calculated difference. COPYRIGHT: (C)2010,JPO&INPIT
    • 要解决的问题:提供一种使用半导体激光器的自耦合效果容易且准确地测量被测量物体的状态变化的测量装置。 解决方案:血流传感器包括:将激光束发射到被测量物体的半导体激光器件; 驱动单元120,其提供用于半导体激光器件的调制驱动的驱动信号; 拍子信号检测部分132,其在驱动信号的第一半周期中检测对应于由于自耦合效应调制的激光束的强度的第一电信号,并且检测第二电信号, 对应于在与第一半周期相反的相位的驱动信号的第二半周期中由于自耦合效应而调制的第二激光束的强度; 差分计算电路136,其计算第一和第二电信号之间的差; 以及测量电路138,其基于计算出的差来测量被测量物体的状态的变化。 版权所有(C)2010,JPO&INPIT