CN216792444U

CN216792444U - High-precision laser ranging structure

Info

Publication number: CN216792444U
Application number: CN202220079559.8U
Authority: CN
Inventors: 唐超
Original assignee: Jiangxi Ruigong Technology Co ltd
Current assignee: Jiangxi Ruigong Technology Co ltd
Priority date: 2022-01-13
Filing date: 2022-01-13
Publication date: 2022-06-21
Anticipated expiration: 2032-01-13

Abstract

The utility model discloses a high-precision laser ranging structure, which comprises: the optical signal processing module is connected with the main transmitter, the optical signal processing module and the inner optical path module, the main transmitter, the optical signal processing module and the inner optical path module are connected with a main board, and the inner optical path module and the main transmitter are respectively arranged on two sides of the optical signal processing module. The layout structure of internal devices is optimized and improved, the internal optical path module and the main emitter are respectively arranged on the left side and the right side of the optical signal processing module and cannot be arranged on the same side, the devices are easy to radiate heat, and the performance stability and the measurement accuracy of the measuring equipment are improved; meanwhile, equipment is easier to debug, does not shield the sight of workers and influence the installation operation, and is favorable for installation and light debugging.

Description

High-precision laser ranging structure

Technical Field

The utility model relates to an improvement of a laser ranging structure.

Background

An inner optical path module of the conventional laser range finder is usually arranged on the same side with a main emitter, and the main emitter is connected through a small plate of an optical signal processing module, so that the internal structure is relatively crowded, each device generates heat during working, the crowding is not beneficial to heat dissipation, the local temperature in the device is overhigh, and the stability and the measurement precision of the device are directly influenced; and crowded devices also increase the difficulty of spot focusing. Wherein, interior light path module all adopts light guide plate, leaded light strip to carry out interior light path transmission usually, and this causes the light path more complicated, simultaneously, for installing inside device, can further increase the light path complexity, the debugging degree of difficulty is also big, still occupies installation space.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a high-precision laser ranging structure.

The technical scheme adopted by the utility model for solving the technical problems is as follows:

a high precision laser ranging structure comprising: the optical signal processing module is connected with the main transmitter, the optical signal processing module and the inner optical path module, the main transmitter, the optical signal processing module and the inner optical path module are connected on a main board, and the inner optical path module and the main transmitter are respectively arranged on the left side and the right side of the optical signal processing module.

The inner optical path module includes: interior light path cavity and all adorn in interior light path cavity and relative and interior transmitter and the reflecting plate of establishing, interior transmitter is connected in the mainboard, to reflecting plate transmission light, and the one side of reflecting plate orientation interior transmitter is the refraction face of slope, and light is behind the refraction face, weakens light signal intensity while redirecting, and final directive light is in the optical signal processing module.

The refracting surface is inclined by 45 degrees.

The two opposite side surfaces of the inner light path cavity are designed to be diffuse reflection plates and made of plastic materials, and the surfaces of the inner light path cavity are subjected to optical extinction treatment.

One end of the reflecting plate is provided with a disc, the disc is rotatably arranged on the surface of the inner light path cavity, and the spatial direction of the refraction surface is adjusted by rotating the disc.

The optical signal processing module includes: the optical signal processing chamber, set up the platelet and weld the APD chip on the platelet on the optical signal processing chamber side, the mainboard is connected to the platelet, and the platelet is just facing to the one end that inwards of light receiving lens cone for light directive APD chip of light that feeds back through the light receiving lens cone, the light of interior light path module also directive APD chip simultaneously.

The surface of the optical signal processing cavity is provided with heat dissipation holes.

The face shell frame, the mounting cavity of the main emitter, the lens cone cavity of the light receiving lens cone, the inner light path cavity and the optical signal processing cavity are made of integrally formed plastic materials to form a whole integrated module, and the integrated module is fixedly connected with the mainboard.

The main transmitter is internally provided with an aspheric lens and is of an integrated structure.

And one end of the light receiving lens barrel facing the surface shell frame is provided with another aspheric lens.

Compared with the prior art, the utility model has the beneficial effects that:

1. the layout structure of the internal devices is optimized and improved, the internal optical path module and the main emitter are respectively arranged on the left side and the right side of the optical signal processing module and are not arranged on the same side, so that the heat concentration of unit area on the mainboard is reduced, and the separated heating devices are easier to dissipate heat, so that each heating device can better operate, and the performance stability and the measurement accuracy of the measuring equipment are improved; meanwhile, equipment is easier to debug, one worker can directly operate the main emitter and the inner light path module, the sight of the worker is not shielded, and the installation operation is not influenced; in addition, the main emitter is directly welded on the mainboard through the single lead, so that the installation position of the small plate of the optical signal processing module can not be occupied, and the welding pins of the small plate are reduced, thereby being more beneficial to installation and optical debugging of the optical signal processing module.

2. The reflecting plate is additionally arranged in the inner light path module, one surface of the reflecting plate facing the inner emitter is a refraction surface inclined by 45 degrees, the refraction surface is made of black materials and is used for absorbing light, the surface of the material is subjected to optical extinction treatment, and light passes through the refraction surface, weakens the light signal intensity and changes the direction simultaneously, so that the received signal intensity requirement of the light signal processing module is met.

Drawings

In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings required for describing the embodiments will be briefly introduced, wherein:

FIG. 1 is a first schematic structural diagram of a preferred embodiment of the present invention;

FIG. 2 is a second schematic structural diagram according to a preferred embodiment of the present invention;

FIG. 3 is a schematic diagram of the internal structure of the preferred embodiment of the present invention.

Detailed Description

The utility model will be further described with reference to the accompanying drawings and specific embodiments. In the preferred embodiments, the terms "upper", "lower", "left", "right", "middle" and "a" are used for clarity of description only, and are not used to limit the scope of the utility model, and the relative relationship between the terms and the terms is not changed or modified substantially without changing the technical content of the utility model.

Referring to fig. 1 to 3, a high precision laser ranging structure according to a preferred embodiment of the present invention mainly includes: the optical signal transmission device comprises a main emitter 2, a light receiving lens barrel 3, an optical signal processing module 4 and an inner optical path module 5, wherein the main emitter 2 and the light receiving lens barrel 3 are embedded in a face shell frame 1 in parallel, the optical signal processing module 4 is in butt joint with one inward end of the light receiving lens barrel 3, the inner optical path module 5 is also in butt joint with one side of the optical signal processing module 4, the main emitter 2, the optical signal processing module 4 and the inner optical path module 5 are all welded and installed on a main board 6 (a main circuit board) to achieve electric control connection, and the inner optical path module 5 and the main emitter 2 are respectively arranged on the left side and the right side of the optical signal processing module 4 and cannot be located on the same side.

When the optical signal processing module works, the main emitter 2, the optical signal processing module 4 and the inner optical path module 5 all belong to heating devices, the inner optical path module 5 and the main emitter 2 are respectively arranged on the left side and the right side of the optical signal processing module 4, so that heat concentration in unit area on the mainboard 6 is reduced, and the separated heating devices are easier to dissipate heat, so that each heating device can better operate, and the performance stability and the measurement accuracy of the measuring equipment are improved; meanwhile, equipment is easier to debug, one worker can directly operate the main emitter 2 and the inner light path module 5, the sight of the worker is not shielded, and installation operation is not influenced; in addition, the main emitter 2 is directly welded on the main board 6 by a single lead, so that the installation position of a small plate (small circuit board) of the optical signal processing module 4 is not occupied, and the welding pins of the small plate are reduced, which is more beneficial to installation and optical debugging of the optical signal processing module 4. The main transmitter 2 is usually placed on the left side of the optical signal processing module 4 and the internal optical path module 5 on the right side.

The inner optical path module 5 includes: interior light path cavity and all set up in the light path cavity and relative and interior transmitter 51 and reflecting plate 52 of establishing, interior transmitter 51 lug weld installs on mainboard 6, it is to reflecting plate emission light, reflecting plate 52 is the refraction face 53 of 45 degrees of slope towards the one side of interior transmitter 51, light is behind the refraction face, weaken light signal intensity and change the direction simultaneously, satisfy under the signal strength requirement prerequisite of light signal processing module 4, final directive light signal processing module 4, thereby light path light transmission in the realization. The refraction surface is made of black material and is used for absorbing light, and meanwhile, the surface of the material is subjected to optical extinction treatment. In order to better eliminate the redundant light in the inner optical path cavity, the two opposite side surfaces of the inner optical path cavity are designed to be diffuse reflection plates 53 made of plastic materials, the surfaces of the inner optical path cavity are also subjected to optical extinction treatment, and the diffuse reflection plates 53 absorb the redundant light to prevent the light from mixing and influencing the measurement precision. The top of reflecting plate 52 is provided with a rotating disc, which is rotatably mounted on the surface of the inner light path chamber, and the spatial orientation of refraction surface 53 is adjusted by rotating the disc, so that the purpose of accurately irradiating to optical signal processing module 4 is achieved, and dimming is facilitated.

The optical signal processing module 4 includes: the optical signal processing chamber, the small plate 41 arranged on the side surface of the optical signal processing chamber and the APD chip 42 welded and installed on the small plate 41, the small plate 41 is welded and fixed on the main board 6, the small plate 41 faces the inward end of the light receiving lens barrel 3, so that the light of the outer optical path fed back by the light receiving lens barrel 3 directly irradiates the APD chip 42, and the light of the inner optical path passing through the reflecting plate 52 also can directly irradiate the APD chip 42; the APD chip can also be called as an avalanche chip, an optical signal receiving chip, etc., and is a light sensing chip, and is triggered to form an electrical signal by receiving a mixed optical signal compensated by an external optical path and an internal optical path, and finally the electrical signal is sent to a main control chip for processing. The surface of the optical signal processing chamber is provided with a heat dissipation hole 43 to enhance heat dissipation of the small plate 41 and the APD chip 42, and more specifically, the heat dissipation hole 43 may be formed on the top surface of the optical signal processing chamber.

The main emitter 2 and the light receiving barrel 3 together constitute an external optical path transmission. Main transmitter 2 embeds there is the aspheric surface lens, adopts the integral type to integrate the structure, and the aspheric surface lens that current corresponds main transmitter is fixed dress at the face shell frame surface of distancer usually with UV glue, has the light path chamber and says, and focusing can consume a large amount of time when assembling main transmitter at every turn. The end of the light receiving lens barrel 3 facing the surface housing frame is provided with another aspheric lens 31 for collecting the light reflected by the converged external light path.

The mounting cavity of the face shell frame 1 and the main emitter 2, the lens cavity of the light receiving lens barrel 3, the inner light path cavity and the optical signal processing cavity can be made of an integrally formed plastic material to form a whole integrated module, and the integrated module is fixedly connected with the mainboard 6 through screws.

The working process of the double-transmitting single-receiving range finder of the utility model is illustrated as follows:

the product starts to send out an instruction, the main transmitter firstly transmits a beam of laser, then the laser is reflected back to the surface of a measuring object to receive the lens, the light receiving lens barrel converges the received light into a 10UM optical signal and transmits the optical signal to the APD chip, the inner optical path module transmits the optical signal to the APD chip according to the size of the optical signal transmitted by the inner transmitter, the APD chip receives the two optical signals and then triggers the work to carry out conversion processing, finally, an electric signal is transmitted to the MCU, and the MCU obtains a measuring result through a series of operations.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any indirect modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present invention by those skilled in the art are within the technical scope of the present invention.

Claims

1. A high accuracy laser rangefinder structure which characterized in that includes: the main emitter, the optical signal processing module and the inner optical path module are all arranged on a main board, and the inner optical path module and the main emitter are respectively arranged on two sides of the optical signal processing module.

2. The high precision laser ranging structure of claim 1, wherein the inner optical path module comprises: interior light path cavity and all adorn in interior light path cavity and relative and interior transmitter and the reflecting plate of establishing, interior transmitter connects the mainboard, to reflecting plate transmission light, and the one side of reflecting plate orientation interior transmitter is the refraction face of slope, and light is behind the refraction face, weakens light signal intensity while redirecting, and final directive is in the light signal processing module.

3. The high precision laser ranging structure of claim 2, wherein the refracting surface is inclined at 45 degrees.

4. A high precision laser ranging structure as claimed in claim 2, wherein the two opposite sides of the inner optical path chamber are designed to be diffuse reflection plates and plastic materials, and the surfaces are optically extinction-processed.

5. A high accuracy laser ranging structure as claimed in claim 2 wherein the reflector plate is provided with a disc at an end facing away from the internal emitter, the disc being rotatably mounted on the face of the internal optical path chamber, the spatial orientation of the refracting surface being adjusted by rotating the disc.

6. The high precision laser ranging structure according to any one of claims 1 to 5, wherein the optical signal processing module comprises: the optical signal processing chamber, set up the platelet and weld the APD chip on the platelet on the optical signal processing chamber side, the platelet is connected the mainboard, and the platelet is just facing to the one end of light receiving lens cone for the light directive APD chip of light that feeds back through the light receiving lens cone, the light of inner optical path module also directive APD chip simultaneously.

7. The laser ranging structure with high precision as claimed in claim 6, wherein the surface of the optical signal processing chamber is provided with heat dissipation holes.

8. The structure of claim 6, wherein the housing, the mounting cavity of the main emitter, the lens barrel cavity of the light receiving lens barrel, the inner optical path cavity and the optical signal processing cavity are made of an integrally formed plastic material to form a whole integrated module, and the integrated module is fixedly connected with the main board.

9. The structure of claim 1, wherein the main transmitter has an aspheric lens built therein, and is an integrated structure.

10. The structure of claim 1, wherein the end of the light receiving barrel facing the surface housing is provided with another aspheric lens for collecting the converged light.