Laser rangefinder correction method

Abstract

The invention provides a laser rangefinder correction method, the method comprises the steps: a plurality targets are arranged on a preset position with the same distance in sequence; wherein reflectivities corresponding to every targets are different; a laser rangefinder is utilized to receive a laser signal reflected by each target and performs waveform analysis on reflected laser signals, so that amplitude values and corresponding measuring distance values are obtained; fitting analyzing and processing are performed on all measuring distance values and amplitude values, and corresponding fitting function relations are obtained; the measuring distance values are corrected according to the fitting function relations, corrected distance values are obtained, according to the above steps, an amplitude-phase error because of different reflectivities is minimized, so that the precision of distance measurement is improved.

Description

technical field [0001] The invention relates to the technical field of measuring instruments, in particular to a calibration method for a laser range finder. Background technique [0002] The laser range finder is an instrument that uses a certain parameter of the modulated laser to accurately measure the distance of the target. As a common laser rangefinder, the pulsed laser rangefinder emits a beam or a sequence of short pulse laser beams to the target when it is working, and the photoelectric element receives the laser beam reflected by the target, and the timer measures the laser beam from The time from transmission to reception calculates the distance from the observer to the target. For the convenience of the following description, record the transmission time as T1 and the reception time as T2. [0003] However, since the reflectivity of different targets is not the same, the intensity of the return light signal generated by targets of different materials at a speci...

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Problems solved by technology

[0005] The inventor found in the research that the zero-crossing detection method in the prior art, due to the nonlinear characteristics of the signal amplification link, makes the peak value of the pulse signal still change with the size of the signal, that is, there is still an amplitude and phase error, thus resulting in inaccurate distance measurements

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