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Method for controlling the dynamics of a distance-measuring apparatus according to the principles of measurement of the transition time of light pulses, and apparatus for carrying out the method
Method for controlling the dynamics of a distance-measuring apparatus according to the principles of measurement of the transition time of light pulses, and apparatus for carrying out the method
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机译：根据光脉冲跃迁时间的测量原理控制测距装置动力学的方法和实施该方法的装置
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摘要
An apparatus measures the distance of a target by measuring the time of travel of a light pulse from the measuring apparatus to the target and back wherein it is important to achieve high accuracy in timing to correlate, for a distant target, the time of transmission with the start of measuring the time of travel and the time of receiving a reflected light pulse and the end of the time measurement. For a near target, the start of distance measurement is correlated with receipt of a reflected measuring light pulse and a stop signal is correlated with a delayed reference light pulse. For this purpose a reference light pulse is branched off from a measuring light pulse and passed by light guides to a single receiver unit. The reference light pulse is passed to the receiver unit either through a short or a long light path depending on whether the target is distant or near, respectively. Attenuators are provided in each path to insure that the start and end of a time measurement of target distance can be performed without interfering signals.
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