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    • 79. 发明授权
    • Optical displacement measuring system using a triangulation including a
processing of position signals in a time sharing manner
    • 光学位移测量系统采用三角测量,包括以时间分配方式处理位置信号
    • US5814808A
    • 1998-09-29
    • US703787
    • 1996-08-27
    • Yuji TakadaHiroshi MatsudaTakayuki Nishikawa
    • Yuji TakadaHiroshi MatsudaTakayuki Nishikawa
    • G01C3/08G01S17/46G01C3/06
    • G01S17/48G01C3/085
    • An optical displacement measuring system using a triangulation comprises a light projecting unit for emitting to an object a light beam which is amplitude-modulated by a reference signal having a predetermined period, a light receiving unit for receiving light reflected back from the object and providing a pair of position signals, and a control signal generator for providing first and second control signals in synchronism with the reference signal. The position signals are processed by a switching unit in a time sharing manner according to the first control signal to obtain a first composite signal, in which the position signals occur alternately every integral number of the period of the reference signal. The first composite signal is amplified by a single amplifier at a desired amplification rate, and then sent to a distance determining unit, in which the polarity of the first composite signal is periodically reversed according to the second control signal to obtain a second composite signal, and a distance signal indicative of a distance between the light projecting unit and the object is determined from the second composite signal.
    • 使用三角测量的光学位移测量系统包括:光投射单元,用于向物体发射由具有预定周期的参考信号进行幅度调制的光束;光接收单元,用于接收从物体反射回来的光,并提供一个 一对位置信号,以及用于与参考信号同步地提供第一和第二控制信号的控制信号发生器。 位置信号根据第一控制信号以时间共享的方式由切换单元处理,以获得第一复合信号,其中位置信号交替产生参考信号周期的每个整数。 第一复合信号以期望的放大率由单个放大器放大,然后发送到距离确定单元,其中第一复合信号的极性根据第二控制信号周期性地反转以获得第二复合信号, 并且根据第二复合信号确定指示光投射单元和物体之间的距离的距离信号。