首页>
外国专利>
Receiver circuit for a distance-measuring apparatus according to the principles of transition time measurement of a light pulse
Receiver circuit for a distance-measuring apparatus according to the principles of transition time measurement of a light pulse
展开▼
机译:根据光脉冲的跃迁时间测量原理的用于测距装置的接收器电路
展开▼
页面导航
摘要
著录项
相似文献
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.
展开▼