Laser imaging radar device and distance measurement method thereof

A laser imaging radar and laser technology, which is used in measurement devices, re-radiation of electromagnetic waves, radio wave measurement systems, etc., can solve problems such as low range resolution of laser imaging radars

Active Publication Date: 2014-03-05
CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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Problems solved by technology

[0007] Aiming at the problem of low range resolution of existing range-gated laser imaging radars, the present invention provides a laser imaging radar device and a m...

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  • Laser imaging radar device and distance measurement method thereof
  • Laser imaging radar device and distance measurement method thereof
  • Laser imaging radar device and distance measurement method thereof

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Embodiment Construction

[0044] The structural principle of the present invention will now be described in detail in conjunction with the accompanying drawings.

[0045] see figure 1 , a laser imaging radar device, including a laser 1, a laser modulation unit 2, an optical antenna unit 3, a detection unit 4, a data processing unit 5 and an image processing unit 6; Signal source 22 and pulse signal generator 23 are made up; Optical antenna unit 3 is made up of optical transmitting antenna 31 and optical receiving antenna 32; Detection unit 4 comprises gate controller 42 and array detector 43; Data processing unit 5 comprises a correlation Device 52; Image processing unit 6 is made up of encoder 61 and computer 62;

[0046] The pulse signal generator 23 generates a clock signal and outputs the clock signal to the m sequence pulse signal source 22 and the detection unit 4 respectively; the m sequence pulse signal source 22 generates the pulse sequence according to the clock signal and inputs the pulse ...

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Abstract

The invention provides a laser imaging radar device and a distance measurement method thereof. The laser imaging radar device and the distance measurement method thereof aims at the problem that an existing distance range gate laser imaging radar is low in distance resolution. The laser imaging radar device comprises a laser device, a laser modulation unit, an optical antenna unit, a detecting unit, a data processing unit and an image processing unit, wherein the detecting unit is composed of a counter, a gate controller and an array detector, and the data processing unit is composed of an accumulator and a correlator. According to the distance measurement method, an information loading process is carried out on laser signals with constant amplitude by using a phase code pulse amplitude modulation mode. The laser imaging radar device and the distance measurement method thereof have the advantages that the equipment and the method combine the advantages of long detecting distances of the distance ranging gate layer imaging radar and the advantage of high distance measurement resolution of the pulse phase coding mode, and meanwhile the detect of low distance measurement resolution of the distance ranging gate layer imaging radar and the detect of low imaging speed of the pulse phase coding mode are avoided.

Description

technical field [0001] The invention relates to the field of laser radar, in particular to a laser imaging radar device and a distance measuring method thereof. This method can break through the limitation of the detector sampling time on the range resolution of the radar system. Background technique [0002] The range-gated laser imaging radar adopts the laser active lighting method, and uses the range gating technology to detect whether there is a laser echo signal within a specific delay period after the signal is emitted, and judge whether the target exists within the corresponding distance period of the delay period. target, and obtain the echo signals of targets at different distances in sequence according to the delay time, so as to obtain the 3D imaging information of the target. The range resolution of range-gated lidar imaging depends first on the range-gate interval, and secondly on the influence of range gate and laser pulse signal fluctuations. Narrow pulse wid...

Claims

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Application Information

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IPC IPC(8): G01S17/89G01S17/10
CPCG01S17/14G01S17/18G01S17/26G01S17/89
Inventor 吴龙张勇赵宁赵远吴杰
Owner CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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