Coaxial debugging device for transmitting and receiving systems of laser range finder

Abstract

The utility model provides a coaxial debugging device for transmitting and receiving systems of a laser range finder, which comprises a parabolic mirror, the laser range finder and an attenuation assembly arranged between the parabolic mirror and the laser range finder. The laser range finder is provided with a paraboloid mirror, the paraboloid mirror reflects to a CCD type light spot analyzer detection surface located at the focus position of the paraboloid mirror, a simulation detector structure tool is installed in the laser range finder, the simulation detector structure tool is used for simulating the position of a detector APD detection surface in the laser range finder, and a semiconductor laser with tail fiber output is installed on the simulation detector structure tool. Laser emitted by the semiconductor laser with tail fiber output penetrates through a receiving mirror of the laser range finder, enters the parabolic mirror through the attenuation assembly and is reflected to a detection surface of the CCD type light spot analyzer through the parabolic mirror, the CCD type light spot analyzer is connected with the upper computer, and the upper computer is used for calculating the mass center position of a laser light spot pattern collected by the CCD type light spot analyzer.

Description

TECHNICAL FIELD

[0001] The utility model belongs to laser range finder coaxial debugging technical field, concretely relates to a laser range finder emission and receiving system coaxial debugging device. BACKGROUND

[0002] The emission and receiving system coaxial debugging method in the field of laser ranging at present, the debugging structure is complex, which brings many inconveniences to the field debugging of laser range finder, and the position accuracy of the rear-end detector of the receiving mirror is not effectively controlled. Therefore, aiming at the problem, a method is designed, which can be applied to field environment debugging in the process of transmitting and receiving coaxial debugging, and the position of the rear-end detector of the receiving mirror is accurately controlled to improve the coaxial debugging accuracy.

[0003] Laser is highly concerned due to its high spatial resolution, high sensitivity monochromaticity, all-weather and other excellent characteristics. The laser transmitting and receiving coaxiality of laser range finder is one of the key technical indexes of laser range finder, which can reflect the ability of the receiving mirror to receive the target diffuse light after the target is irradiated by the far-field light beam of laser. In the case of good coaxiality, the detection ability of the laser range finder can be improved.

[0004] Patent CN117614518A provides a transmitting and receiving coaxial debugging principle, that is, using the principle of optical path reversibility and the principle of equivalent infinite distance at the focal point position after parabolic mirror reflection, the coaxial debugging between the optical transmitting and receiving components is realized. Patent CN115355851A provides a calculation formula of the transmitting and receiving coaxiality difference, which provides accurate and effective data basis for subsequent transmitting and receiving coaxial debugging, thereby improving the accuracy of coaxial debugging. Patent CN102230962A provides the placement position of the debugging equipment, but the patent has high requirements for the debugging equipment and the debugging site, the debugging process is complicated, and the position of the rear-end detector of the receiving mirror is not accurately controlled. Therefore, it is not applicable to the field coaxial debugging of laser range finder. UTILITY MODEL CONTENTS

[0005] The utility model provides a laser range finder emission and receiving system coaxial debugging device aiming at the deficiency of prior art, to solve the problem of inconvenient coaxial debugging and insufficient precision in the field environment.

[0006] The utility model achieves the purpose by the following technical scheme:

[0007] A laser range finder emission and receiving system coaxial debugging device, comprising a parabolic mirror and a laser range finder, wherein an attenuation assembly is arranged between the parabolic mirror and the laser range finder, laser emitted by a laser of the laser range finder passes through the attenuation assembly and is incident into the parabolic mirror, is reflected by the parabolic mirror and is incident into a CCD type spot analyzer detection surface located at a focal point position of the parabolic mirror, an analog detector structure tool is installed in the laser range finder, the analog detector structure tool is used for simulating a detector APD detection surface position in the laser range finder, a semiconductor laser with a tail fiber output is installed on the analog detector structure tool, laser emitted by the semiconductor laser with the tail fiber output passes through a receiving mirror of the laser range finder and is incident into the parabolic mirror through the attenuation assembly, is reflected by the parabolic mirror and is incident into the CCD type spot analyzer detection surface, the CCD type spot analyzer is connected with an upper computer, and the upper computer is used for calculating a centroid position of a laser spot pattern collected by the CCD type spot analyzer.

[0008] Further, the parabolic mirror is a reflective defocus parabolic mirror.

[0009] Further, the analog detector structure tool comprises a bottom plate, wherein a boss and a fixing hole are arranged on the bottom plate, the boss is used for simulating an APD target surface position, and the analog detector structure tool is fixed to the receiving mirror through the fixing hole.

[0010] Compared with the prior art, the laser range finder emission and receiving system coaxial debugging device has the beneficial effects that:

[0011] The laser range finder emission and receiving system coaxial debugging device provided by the utility model has simple structure, has no requirement on a debugging site and can meet the conditions such as field debugging. The analog detector structure tool simulates the actual laser range finder detector APD detection surface position, the semiconductor laser with the tail fiber output is placed into the analog detector structure tool after the analog detector structure tool is installed with the receiving mirror, the light emitting surface of the semiconductor laser with the tail fiber output is the actual laser range finder detector APD detection surface position, the coaxial consistency of the receiving mirror and the detector APD is improved, the accuracy of the laser range finder coaxial debugging is improved, and therefore the detection capability is improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only exemplary, and those skilled in the art can also obtain other implementation drawings according to the provided drawings without any creative effort.

[0013] Figure 1 It is a whole structure schematic view of the utility model.

[0014] Figure 2 The utility model simulates the structure frock structure diagram of probe of the utility model.

[0015] The mark in the drawing: 1 - parabolic mirror, 2 - laser range finder, 3 - attenuation component, 4 - CCD type spot analyzer, 5 - laser, 6 - receiving mirror, 7 - analog probe structure frock, 8 - semiconductor laser with tail fiber output, 9 - host computer, 701 - bottom plate, 702 - boss, 703 - fixed hole. DETAILED DESCRIPTION

[0016] Exemplary embodiments of the utility model will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the utility model are shown in the drawings, it should be understood that the utility model can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the utility model and to enable the scope of the utility model to be fully conveyed to those skilled in the art. It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict. The utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0017] The utility model discloses a kind of laser range finder transmission and receiving system coaxial debugging device's embodiment, as Figure 1 As shown, including parabolic mirror 1, laser range finder 2, attenuation component 3, CCD type spot analyzer 4, analog probe structure frock 7, semiconductor laser with tail fiber output 8 and host computer 9, analog probe structure frock 7 is installed on the receiving mirror 6 of laser range finder 2, for simulating actual laser range finder probe APD detection surface position, the detection surface of CCD type spot analyzer 4 is located at the focal point position of parabolic mirror 1, host computer 9 is connected with CCD type spot analyzer 4, for calculating the centroid position of laser spot pattern that CCD type spot analyzer 4 is collected, optical path is as follows: the laser of laser range finder 2 5 is emitted by parabolic mirror 1 reflection to the detection surface of CCD type spot analyzer 4 after passing attenuation component 3, the laser that semiconductor laser with tail fiber output 8 is emitted passes through the receiving mirror 6 of laser range finder 2 and attenuation component 3 by analog probe structure frock 7, by parabolic mirror 1 reflection to the detection surface of CCD type spot analyzer 4.

[0018] Its operation process is as follows:

[0019] Parabolic mirror 1 uses the reflection type defocus parabolic mirror of optical precision machining, aperture selects 400mm, focal length selects 3.014m.

[0020] Attenuation component 3 cooperates with the light wavelength of laser 5, and attenuation size can be adjusted.

[0021] The CCD type spot analyzer 4 adopts a BeamOn U3-VIS-NIR type spot analyzer, and main performance parameters thereof are as follows: a CCD area of 1 / 1.2 inches, a spectral response rate of 350-1600 nm, and a power detection range of 50 W / cm in the case of using a self-attenuation sheet 2 .

[0022] The simulation detector structure tool 7, as shown in Figure 2 Fig. 7, comprises a bottom plate 701, and the bottom plate 701 is provided with a boss 702 and a fixing hole 703, the boss 702 is used for simulating the position of the APD target surface, and the simulation detector structure tool 7 is fixed to the receiving mirror 6 through the fixing hole 703. The simulation detector structure tool 7 is fixed to the receiving mirror 6 to determine that the two are tightly fitted and do not shake, and the semiconductor laser 8 with a tail fiber output is installed on the simulation detector structure tool 7, so that the light emitting surface of the semiconductor laser 8 with a tail fiber output is the position of the APD detection surface of the actual laser range finder detector, that is, the focal point position of the receiving mirror 6.

[0023] The semiconductor laser 8 with a tail fiber output is of a QSC0-1064-040-221 type, and main performance parameters thereof are as follows: a central wavelength of 1064 nm, an output power of 4 W, a fiber core diameter of 200 μm, and a fiber numerical aperture of 0.22.

[0024] The position of the CCD type spot analyzer 4 is adjusted, so that the distance between the detection surface of the CCD type spot analyzer 4 and the parabolic mirror 1 is the focal length of the parabolic mirror 1, and the angle between the light emitting port of the laser 5 and the center point of the receiving mirror 6 to the CCD type spot analyzer 4 is less than the off-axis angle of the parabolic mirror 1.

[0025] The laser 5 is powered on, and the light emitted after the laser 5 passes through the attenuation assembly 3 is adjusted, so that the light beam reflected by the parabolic mirror 1 is incident on the detection surface of the CCD type spot analyzer 4, and the centroid position (X0, Y0) of the laser spot pattern collected by the CCD type spot analyzer is obtained through the host computer 9.

[0026] The semiconductor laser 8 with a tail fiber output is powered on, the light beam generated by the semiconductor laser 8 with a tail fiber output is incident on the parabolic mirror 1 after passing through the receiving mirror 6, is reflected to be incident on the detection surface of the CCD type spot analyzer 4, the centroid position (X1, Y1) of the semiconductor laser 8 with a tail fiber output spot collected by the CCD type spot analyzer 4 is calculated in real time through the host computer 9, the position of the receiving mirror 6 is adjusted, so that the deviation of the centroid positions of the laser 5 and the semiconductor laser 8 with a tail fiber output reaches an error tolerance value, and coaxial debugging is realized. The formula for calculating the coaxial error value is as follows:

[0027]

[0028] Wherein D represents the transceiving coaxiality error value, F represents the parabolic mirror focal length.

[0029] The utility model is described in detail through the above examples, but the content is only the exemplary embodiment of the utility model, and cannot be considered to limit the implementation range of the utility model. The protection scope of the utility model is defined by the claims. Any technical solution utilizing the technical solution of the utility model, or inspired by the technical solution of the utility model, within the essence and protection scope of the utility model, designing similar technical solutions to achieve the above technical effects, or making equivalent changes and improvements to the application scope, should still belong to the patent coverage protection scope of the utility model. It should be noted that, in order to clearly express, the description of the utility model omits the expression of some components and processes known to those skilled in the art which are not directly and obviously related to the protection scope of the utility model.

Claims

1. A laser range finder transmitting and receiving system coaxial adjustment device, characterized in that, The application relates to a laser ranging device, which comprises a parabolic mirror (1) and a laser ranging device (2), wherein an attenuation assembly (3) is arranged between the parabolic mirror (1) and the laser ranging device (2), laser emitted by a laser (5) of the laser ranging device (2) is shot into the parabolic mirror (1) through the attenuation assembly (3), is reflected by the parabolic mirror (1) and is shot into a CCD type spot analyzer (4) detection surface located at a focal point position of the parabolic mirror (1), an analog detector structure tooling (7) is arranged in the laser ranging device (2), the analog detector structure tooling (7) is used for simulating a detector APD detection surface position in the laser ranging device (2), a semiconductor laser (8) with a tail fiber output is arranged on the analog detector structure tooling (7), laser emitted by the semiconductor laser (8) with the tail fiber output passes through a receiving mirror (6) of the laser ranging device (2) and is shot into the parabolic mirror (1) through the attenuation assembly (3), is reflected by the parabolic mirror (1) and is shot into the CCD type spot analyzer (4) detection surface, the CCD type spot analyzer (4) is connected with an upper computer (9), and the upper computer (9) is used for calculating a mass center position of a laser spot pattern collected by the CCD type spot analyzer (4).

2. The coaxial alignment device for a laser range finder transmitting and receiving system according to claim 1, wherein, The parabolic mirror (1) is a reflective defocus parabolic mirror.

3. The coaxial alignment device for a laser range finder transmitting and receiving system according to claim 1, wherein, The analog detector structure tooling (7) comprises a bottom plate (701), the bottom plate (701) is provided with a boss (702) and a fixing hole (703), the boss (702) is used for simulating an APD target surface position, and the analog detector structure tooling (7) is fixed to the receiving mirror (6) through the fixing hole (703).

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