Target distance acquisition method

A target distance and target technology, applied in the field of target distance acquisition, can solve the problems of target ranging errors, inconvenient use of laser range finders, etc., and achieve the effect of ensuring the accuracy of ranging

Active Publication Date: 2020-06-12
西安应用光学研究所
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Problems solved by technology

However, this kind of rangefinder can only measure the distance of a single target. In practice, there are often multiple targets before and after the irradiation / receiving field of view, which will cause target ranging errors.
Therefore, it is extremely inconvenient to use a laser rangefinder that only has a single target rangefinder.

Method used

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Embodiment Construction

[0024] In order to make the purpose, content, and advantages of the present invention clearer, the specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0025] In order to solve the problems of the prior art, the present invention provides a method for acquiring the target distance, such as figure 1 As shown, the method includes the following steps:

[0026] Step 1: Control the laser to emit a nanosecond pulse, and irradiate the target through the emission optics;

[0027] Step 2: The target echo signal is received optically and converged on the detector, and the output signal of the detector is amplified and processed by the signal processing circuit;

[0028] Step 3: Use the high-speed acquisition circuit to use τ as the sampling time interval to collect the amplified and processed signal to obtain the signal sequence x(k·τ), where k=1, 2, 3, 4... is the kth of the ...

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Abstract

The invention belongs to the technical field of optical measurement, and particularly relates to a target distance obtaining method. According to the technical scheme, based on a multi-target distanceobtaining method of an existing distance measuring system, pulse laser is emitted through an emitting optical member and is collected to a detector by a receiving optical member after being reflectedby a target, an electric signal output by the detector is processed by a signal processing board, and a high-speed collecting circuit is used for collecting a detector signal; andfinally, through peak detection, finding a local strongest point of echo signal energy as a feature point of the target, wherein the position corresponding to the point represents the distance information of the target.According to the technical scheme, a high-speed continuous sampling circuit is used for continuously collecting reflection signals, and the multi-target distance is obtained by searching for a plurality of peak points of a voltage sequence obtained through sampling; and the target distance is obtained according to the sequence of the target and other objects on the irradiation path. The problem that the prior art is inconvenient to use is solved.

Description

technical field [0001] The invention belongs to the technical field of optical metrology, and in particular relates to a method for acquiring a target distance. Background technique [0002] In many cases, the target distance needs to be known. Laser ranging is to use the advantages of laser to achieve high-precision measurement of target distance, and it is one of the effective means of actual distance measurement. [0003] The basic principle of the pulsed laser rangefinder is that the rangefinder emits laser light to the target and records the round-trip time of the laser. Through this round-trip time, it can be converted into the measured distance. The calculation formula is the speed of light multiplied by half of the round-trip time . The range finder has the advantages of simple principle, light weight, small volume, simple operation, fast speed and accuracy. However, this kind of rangefinder can only measure the distance of a single target. In practice, there are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/48
CPCG01S17/48
Inventor 俞兵张博妮赵俊成薛媛元康臻于东钰吴沛吴磊杨朋利张魁甲吕春莉
Owner 西安应用光学研究所
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