Importance

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Abstract

A method for target-range measurement of round-trip transit time, for laser light pulses transmitted from the rangefinder and target-reflected back to a measuring device, is based on the fact that a predetermined measurement cycle is subdivided into time intervals and that, in each time interval, it is recorded whether a reflected light pulse has or has not arrived. A system for carrying out the method is characterized by the fact that, instead of totalizing counter modules, successive storage locations in a serial memory device are sequentially indexed under clock-pulse control and, depending upon the time at which a target-reflected pulse is detected, a logic signal is supplied for storage at the instantaneously receptive location within the memory device. Signal-evaluation apparatus including a microprocessor is connected to the memory device to evaluate range from the memory location at which the logic signal is found.

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First Claim