High precision laser range finder

Abstract

The invention provides a high precision laser range finder which comprises a laser transmitter, a laser receiver, a timer and a calculator, wherein the triggering end of the laser transmitter is coupled with a triggering switch and a trigger; the control end of the trigger is coupled with the laser receiver; the laser transmitter is further coupled with the timer; the timer begins to perform timing while the laser transmitter transmits the first laser pulse; the laser receiver is coupled with a counter; for each time that the laser receiver receives one reflection laser pulse, the counter counts for one time; the laser receiver transmits a timing stopping request to the timer through a gate switch; the gate switch is coupled with the counter; the counter releases the timing stopping request to the timer while counting to a set value; and at the same time the counter transmits a stopping receiving request to the laser receiver; and finally the tested range is calculated by the calculator. The laser range finder belongs to pulse type range finders; and not only can a range of a ground object in a long distance be measured, but also the precision is high.

Description

[0001] technical field [0002] The invention relates to an electronic measuring instrument, in particular to a pulse type laser range finder. [0003] Background technique [0004] Laser range finder is a kind of measuring instrument commonly used in engineering. Because of its convenient measurement, it is widely favored by engineering surveyors. [0005] There are two types of current laser range finders. The first type is a pulsed laser rangefinder. During measurement, the laser transmitter sends a laser pulse to the target. After the laser pulse is emitted back, it is received by the laser receiver. The timer records the time consumed by the laser pulse back and forth. , according to the speed of light and the theoretical delay of electronic components, the distance of the measured object can be obtained. The second type is a continuous wave laser rangefinder, also known as a phase laser rangefinder. During measurement, the laser beam of the rangefinder is frequency ...

AI Technical Summary

Problems solved by technology

The second type is a continuous wave laser rangefinder, also known as a phase laser rangefinder. During measurement, the laser beam of the rangefinder is frequency modulated and the phase delay generated by the modulated light going back and forth to the survey line is measured, and then according to the modulation The wavelength of light is converted to the distance represented by the phase delay; compared with the pulsed laser rangefinder, the continuous wave laser rangefinder has a lower transmission power, so the ability to measure long distances is relatively poor, and generally can only be used in precision ranging

[0007] However, for laser range finders, this error effect is very large

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