Correlation sampling based laser multi-pulse ranging system

A technology of laser pulse and ranging system, which is applied in the direction of radio wave measurement system, measuring device, electromagnetic wave re-radiation, etc. It can solve the problems of difficult accurate measurement and short short-range echo time, so as to improve accuracy, reduce sampling time, The effect of increasing the ranging speed

Inactive Publication Date: 2015-08-19
XIAMEN UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to provide a laser multi-pulse ranging system mainly used to solve the short-range echo time and difficult to measure accurately in order to achieve high precision and non-contact based on correlation sampling

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  • Correlation sampling based laser multi-pulse ranging system
  • Correlation sampling based laser multi-pulse ranging system
  • Correlation sampling based laser multi-pulse ranging system

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Embodiment Construction

[0026] See figure 1 The laser multi-pulse ranging system based on correlation sampling described in this embodiment is provided with a clock control circuit module 1, a laser pulse transmitting module 2, a laser pulse receiving module 3, and a time information processing module 4; figure 1 Among them, the mark 5 indicates the spectroscope; the mark P indicates the object to be measured.

[0027] The clock control circuit module 1 has two clock signal output terminals, one of the clock signal output terminals is connected to the input terminal of the laser pulse emission module 2, the other clock signal output terminal is connected to the input terminal of the time information processing module 4, and the laser pulse emission module 2 outputs The output laser is irradiated on the measured object P, and the input end of the laser pulse receiving module 3 receives the echo pulse reflected by the measured object P and outputs it to the time information processing module 4 for calculati...

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Abstract

The invention provides a correlation sampling based laser multi-pulse ranging system, relating to a laser ranging system. The correlation sampling based laser multi-pulse ranging system is provided with a clock control circuit module, a laser pulse transmitting module, a laser pulse receiving module and a time information processing module, wherein the clock control circuit module is provided with two clock signal output ends and is provided with a local oscillator, a first frequency divider, a second frequency divider, a first mono-stability trigger and a second mono-stability trigger; the laser pulse transmitting module is provided with a pulse driving circuit, a semiconductor laser, an opto-isolator and a collimating lens; the laser pulse receiving module is provided with an avalanche photodiode, a pre-filtering amplifying circuit, an opto-isolator and a focusing lens; and the time information processing module is provided with a first sample holding circuit and a second sample holding circuit. A sampling signal is subjected to frequency doubling, the sampling time of transmitting pulse and receiving pulse is reduced, the ranging speed is increased, the measurement precision is improved, and the correlation sampling based laser multi-pulse ranging system can solve the problem of low precision in a short-range laser ranging mode.

Description

Technical field [0001] The invention relates to a laser ranging system, in particular to a laser multi-pulse ranging system based on correlation sampling. Background technique [0002] While the rapid development of laser technology has brought benefits to the society, it has also brought a huge market to businesses. The main reason why laser can be applied to various fields is its good directivity, high brightness and concentration, great energy and good coherence. The use of laser as a means of ranging can be summarized into three categories in terms of realization methods: interferometry, triangulation and time-of-flight method. The time-of-flight method calculates the target object based on the flight time of the laser directly or indirectly. distance. Chinese patent CN102901970A proposes a single-modulation continuous wave laser ranging device. This design continuously sends laser signals while the receiving module continuously receives echo signals. By judging the start a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/10G01S7/486
CPCG01S17/10G01S7/4861
Inventor 郭东辉陈新民
Owner XIAMEN UNIV
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