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    • 11. 发明专利
    • Distance/speed meter and distance/speed measurement method
    • 距离/速度计和距离/速度测量方法
    • JP2008275594A
    • 2008-11-13
    • JP2008054699
    • 2008-03-05
    • Yamatake Corp株式会社山武
    • UENO TATSUYA
    • G01S17/50G01B9/02G01P3/36
    • G01B9/02007G01B9/02004G01B9/02092G01B2290/45G01P3/366G01S17/325G01S17/87
    • PROBLEM TO BE SOLVED: To shorten measuring time in a distance/speed meter and a distance/speed measurement method capable of measuring not only the distance to a measurement object in a stationary state, but also the speed of the measurement object by using interference of light. SOLUTION: This distance/speed meter has a laser driver 4-1 for operating a semiconductor laser 1-1 so that a first oscillation period when the oscillation wavelength increases and a second oscillation period when the oscillation wavelength decreases alternately exist, a laser driver 4-2 for operating a semiconductor laser 1-2 so as to perform oscillation with a phase reverse to that of the laser 1-1, photodiodes 2-1, 2-2 for converting the optical outputs of the lasers 1-1, 1-2 into electric signals, counting means 5-1, 5-2, 6-1, 6-2, 7 for counting the number of interference waveforms contained in the outputs of the photodiodes 2-1, 2-2 for each of the photodiodes 2-1, 2-2, and a calculation device 8 for calculating the distance to the measurement object and the speed of the measurement object from the minimum oscillation wavelength(s) and the maximum oscillation wavelength(s) of the lasers 1-1, 1-2, and the counting results. COPYRIGHT: (C)2009,JPO&INPIT
    • 要解决的问题:为了缩短距离/速度计中的测量时间和距离/速度测量方法,其能够不仅测量在静止状态下到测量对象的距离,而且还可以测量测量对象的速度 使用光的干扰。 解决方案:该距离/速度计具有用于操作半导体激光器1-1的激光驱动器4-1,使得当振荡波长增加时的第一振荡周期和当振荡波长交替变化时的第二振荡周期存在时, 用于操作半导体激光器1-2的激光驱动器4-2以与激光器1-1相反的相位执行振荡,用于转换激光器1-1的光输出的光电二极管2-1,2-2 ,1-2为电信号,计数装置5-1,5-2,6-1,6-2,7用于对每个光电二极管2-1,2-2的输出中包含的干扰波形的数量进行计数 的光电二极管2-1,2-2,以及计算装置8,用于根据激光器的最小振荡波长和最大振荡波长(s)计算到测量对象的距离和测量对象的速度 1-1,1-2,以及计数结果。 版权所有(C)2009,JPO&INPIT