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Range finding method of pulsed laser rangefinder

A technology of pulsed laser distance measurement and distance measurement method, which is applied in the direction of instruments, measuring devices, re-radiation of electromagnetic waves, etc.

Inactive Publication Date: 2012-08-01
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

In the time identification method introduced above, the delay process and attenuation process of the input pulse signal in the second method and the high-pass filter are used in the third method to convert the unipolar pulse signal output by the echo receiving amplifier circuit into a bipolar pulse signal In the output process, the signal is simulated and changed, which will introduce new errors

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  • Range finding method of pulsed laser rangefinder
  • Range finding method of pulsed laser rangefinder
  • Range finding method of pulsed laser rangefinder

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Embodiment Construction

[0038] In order to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0039] Such as image 3 , the pulse laser rangefinder includes a pulse laser, a photoelectric detector, an amplifier, a dual comparator, a time-to-digital converter TDC, and a measurement control module; the photodetector is connected to the amplifier, and the output of the amplifier is connected to two of the dual comparator. The positive input terminal is connected, and two different discrimination threshold levels are respectively input at the two negative input terminals of the dual comparator, the output terminal of the dual comparator is connected with the time-to-digital converter TDC, the measurement control module is connected with the time digital The converter TDC and the pulse laser are respectively connected; formula (5) and formula (6) are pre-s...

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Abstract

The invention discloses a range finding method of a pulsed laser rangefinder. The pulsed laser rangefinder comprises a pulsed laser, a photoelectric detector, an amplifier, a double-channel comparator, a time digital converter TDC and a measurement control module, wherein the photoelectric detector is connected with the amplifier; an output end of the amplifier is connected with two positive input ends of the double-channel comparator; two different discriminating threshold levels are respectively input to two positive input ends of the double-channel comparator; an output end of the double-channel comparator is connected with the time digital converter TDC; and the measurement control module is respectively connected with the time digital converter TDC and the pulsed laser; and by using the range finding method disclosed by the invention, the drift error can be reduced and the range finding accuracy can be improved.

Description

technical field [0001] The invention relates to the field of measuring instruments, in particular to the field of laser range finders and the field of high-precision time interval measurement, and specifically refers to a distance measuring method of a pulse laser range finder. Background technique [0002] The pulse laser rangefinder uses a pulse laser to emit a single laser pulse signal to illuminate the target, and detects the echo pulse laser signal returned by the target. By measuring the time interval between the moment of laser emission and the return moment of the echo signal, the target can be obtained The distance to the rangefinder. The ranging formula of the pulsed laser range finder is: Among them, R is the measurement distance, c is the speed of light, and Δt is the laser flight time including the round-trip flight time of the pulsed laser signal. It can be seen from the ranging formula that the ranging accuracy of the pulse laser range finder is determined ...

Claims

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Application Information

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IPC IPC(8): G01S7/483G01S17/08
Inventor 纪荣祎赵长明陈国李鲲
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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