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    • 1. 发明公开
    • Method and system for measuring distance
    • Verfahren und System zum Messen des Abstands
    • EP2546708A1
    • 2013-01-16
    • EP11182877.8
    • 2011-09-27
    • Askey Technology (Jiangsu) Ltd.Askey Computer Corp.
    • Chou, Ming-HungHsieh, Ching-Feng
    • G04F10/04G01S17/10G04F10/00
    • G04F10/04G01S17/105G04F10/005
    • A method for measuring distance involves calculating a distance based on light speed and a time taken by an optical signal to travel to an obj ect and return therefrom. The method includes calculating a time based on a cycle number of a reference signal under a clock mask synchronized with emission and reception of the optical signal; correcting the time according to a plurality of phase shift signals generated based on the reference signal; and minimizing an error of the time by increasing the quantity of the phase shift signals. The method enhances the accuracy of the measured time taken by an optical signal to travel to an object and return therefrom, speeds up measurement, and reduces the required circuit areas. A system for measuring distance is further introduced for use with the method.
    • 用于测量距离的方法包括基于光速计算距离,以及由光信号行进到对象并从其返回的时间。 该方法包括基于与光信号的发射和接收同步的时钟掩码下的参考信号的周期数来计算时间; 根据基于参考信号生成的多个相移信号校正时间; 并且通过增加相移信号的量来最小化时间的误差。 该方法提高了光信号行进到物体并返回的测量时间的精度,加速了测量,并减少了所需的电路面积。 进一步介绍了一种用于测量距离的系统,用于该方法。