Common inductance type laser image fusion distance sensing device

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By adopting a common-sensing laser image fusion distance sensing device in the laser displacement sensor, and using reflectors and semi-inverted semi-lens to share COMS sensors and LED fill lights, the high cost caused by the independence of laser displacement sensors and two-dimensional camera lenses is solved. and maintenance issues, dynamic object positioning and precise measurement, reducing equipment costs and maintenance complexity.

CN119270296APending Publication Date: 2025-01-07SHANGHAI TUNNEL ENG INTELLIGENT MFG HAIYAN

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Patent Information

Application Number: CN202411671768.1
Authority / Receiving Office: CN · China
Patent Type: Applications(China)
Current Assignee / Owner
Filing Date: 2024-11-20
Publication Date: 2025-01-07

AI Technical Summary

Technical Problem

The existing laser displacement sensors and two-dimensional camera lenses are relatively independent, with high cost and large space occupancy, and require subsequent calibration and maintenance, resulting in high maintenance costs.

Method used

Using a common sense laser image fusion distance sensing device, by setting a mirror and a semi-inverted semi-lens in the housing, the laser receiving lens module and the image receiving lens module share the COMS sensor, combined with LED fill lights, reducing costs and occupation and calibrate the positional relationship between the laser and image sensor at the factory to reduce subsequent maintenance needs.

Benefits of technology

The visual positioning function of dynamic objects is realized, the cost of ranging sensors is reduced, the complexity of installation and maintenance is reduced, and the convenience and compactness of the equipment are improved.

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Abstract

The invention discloses a common-inductance laser image fusion distance sensing device which comprises a shell, a COMS sensor, a mainboard, an image receiving lens module, a laser receiving lens module and a laser transmitter are arranged on the inner walls of the two sides of the shell, a reflecting mirror and a semi-reflecting and semi-transmitting mirror are arranged in the middle of the interior of the shell, and a communication power supply interface is formed in the side end of the shell. An upper cover is arranged on the shell. The reflecting mirror and the semi-reflecting and semi-transmitting mirror are located between the mainboard and the laser receiving lens module and between the mainboard and the image receiving lens module respectively, the laser receiving lens module and the image receiving lens module share one COMS sensor through a special light path structure, the dynamic object visual positioning function is achieved, and the visual positioning precision of the laser receiving lens module and the image receiving lens module is improved. Moreover, the laser and the image receiving lens module are combined and are calibrated after leaving a factory, and the relative position relation between the laser and the image sensor does not need to be calibrated in subsequent installation, so that the installation is more convenient.

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Description

Technical Field

[0001] The present invention belongs to the technical field of distance sensing devices, and in particular relates to a sympathetic laser image fusion distance sensing device. Background Art

[0002] At present, laser displacement sensors are used in the market for high-precision distance measurement. Laser displacement sensors work on the principle of triangulation. The laser transmitter emits a laser beam. When the laser irradiates the surface of the target object, part of the light will be reflected back to the sensor photosensitive element. By analyzing the position of the laser spot on the photosensitive element and the relative position relationship between the photosensitive element and the laser transmitter, the precise distance between the measured surface and the sensor can be calculated.

[0003] However, when the object being measured is dynamic, the laser displacement sensor cannot know the real-time position of the object. Therefore, the position of the laser irradiating the surface of the object changes, and the measured value is not the true value of the position of interest, resulting in measurement errors. With current technology, the real-time position of the object can be located by adding a visual system composed of a two-dimensional camera lens, thereby adjusting the position of the laser displacement sensor to the mechanical structure to achieve accurate measurement of the position of interest. Although the function is realized, the two measurement systems are relatively independent, the cost is very high, and the space occupied is large. The positional relationship between the camera and the laser displacement sensor needs to be calibrated after installation, and subsequent loosening requires recalibration, which has high maintenance costs. Summary of the invention

[0004] The purpose of the present invention is to propose a sympathetic laser image fusion distance sensing device to solve the problems that the current laser displacement sensor and two-dimensional camera lens are relatively independent, the cost is very high, and the space occupied is large. The positional relationship between the camera and the laser displacement sensor needs to be calibrated after installation, and subsequent loosening requires re-calibration, resulting in high maintenance costs.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a sympathetic laser image fusion distance sensing device, comprising a shell, the inner walls of both sides of the shell are provided with a COMS sensor, a main board, an image receiving lens module, a laser receiving lens module and a laser emitter, a reflector and a half-reflective half-mirror are provided in the middle position of the shell, a communication power supply interface is provided at the side end of the shell, and an upper cover is provided on the shell.

[0006] As a further description of the above technical solution:

[0007] The mainboard is fixed to the inner wall of the housing by screws, a thermal conductive silicone pad is pasted on the back of the mainboard, the COMS sensor is connected to the mainboard, and the mainboard is also provided with a wiring terminal.

[0008] As a further description of the above technical solution:

[0009] A rubber pad is arranged between the communication power supply interface and the housing.

[0010] As a further description of the above technical solution:

[0011] A concave surface that is recessed inward is arranged on one side of the shell, and a laser protection mirror is arranged on the concave surface and on the laser receiving lens module.

[0012] As a further description of the above technical solution:

[0013] The laser emitter is connected to the laser limiting platform, and the laser pressing sheet is pressed onto the laser emitter.

[0014] As a further description of the above technical solution:

[0015] The laser protection mirror is provided with an anti-reflection film.

[0016] As a further description of the above technical solution:

[0017] A lens module mounting platform is arranged in the shell, a lens module limiting groove is arranged on the lens module mounting platform, and the laser receiving lens module is connected to the lens module limiting groove.

[0018] As a further description of the above technical solution:

[0019] A square platform is arranged in the shell, a limiting groove is arranged in the square platform, the bottom of the image receiving lens is connected to the limiting groove, and the rear end of the image receiving lens is connected to the fill light circuit board.

[0020] As a further description of the above technical solution:

[0021] The shell is provided with a plurality of through holes and mounting holes, a plurality of LED fill lights are connected to the fill light circuit board through the through holes, and the image receiving protection window is installed in the mounting holes.

[0022] As a further description of the above technical solution:

[0023] The reflector and the half-reflecting half-mirror are respectively located between the main board and the laser receiving lens module, and between the main board and the image receiving lens module. The reflector is connected to the reflector base, and the half-reflecting half-mirror is connected to the lens base.

[0024] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0025] 1. In the present invention, by arranging the reflector and the semi-reflective and semi-transparent mirror between the main board and the laser receiving lens module, and between the main board and the image receiving lens module respectively, and through a special optical path structure, the laser receiving lens module and the image receiving lens module share a COMS sensor. This solution not only realizes the visual positioning function of dynamic objects, but also reduces the cost of the ranging sensor. By setting an LED fill light, there is no need to add an additional light source during image acquisition, thereby reducing costs and occupying less space. The laser and image receiving lens module are combined and calibrated at the factory, and the subsequent installation does not require the relative position relationship between the laser and the image sensor to be calibrated, making the installation more convenient, the structure more compact, and the maintenance cost less.

[0026] 2. In the present invention, the mainboard is fixed to the upper end of the main body by screws, and a thermal conductive silicone pad is attached to the back of the mainboard to achieve insulation and thermal conductivity. A COMS sensor is designed on the mainboard for image reception, converting optical signals into electrical signals to achieve image photoelectric conversion; in addition, the CMOS sensor can also receive the reflected laser, and by accurately sensing the position of different pixel points of the laser on the sensor, combined with the positional relationship between the laser emission point and the receiving point on the CMOS sensor, the specific distance of the measured surface can be accurately calculated using the triangulation distance measurement principle. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 A stereoscopic diagram of a sympathetic laser image fusion distance sensing device.

[0029] Figure 2 Decomposition of a sympathetic laser image fusion distance sensor device Figure 1 .

[0030] Figure 3 Decomposition of a sympathetic laser image fusion distance sensor device Figure 2 .

[0031] Figure 4 Decomposition of a sympathetic laser image fusion distance sensor device Figure 3 .

[0032] Legend:

[0033] 1-housing; 2-COMS sensor; 3-mainboard; 4-image receiving lens module; 5-laser receiving lens module; 6-laser transmitter; 7-reflector; 8-semi-reflective and semi-mirror; 9-communication power supply interface; 10-upper cover; 11-wiring terminal; 12-concave surface; 13-laser protection mirror; 14-laser limiter; 15-laser clamping plate; 16-lens module mounting table; 17-square table; 18-through hole; 19-mounting hole; 20-fill light circuit board; 21-image receiving protection window; 22-LED fill light. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0038] In the description of the embodiments of the present invention, it should be noted that the terms "upper", "inner", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0039] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] See also Figure 1-4 The present invention provides a technical solution: a sympathetic laser image fusion distance sensor device, comprising a shell 1, wherein the inner walls on both sides of the shell 1 are provided with a COMS sensor 2, a main board 3, an image receiving lens module 4, a laser receiving lens module 5 and a laser transmitter 6, a reflector 7 and a semi-reflective and semi-mirror 8 are provided in the middle position of the shell 1, a communication power supply interface 9 is provided at the side end of the shell 1, and an upper cover 10 is provided on the shell 1.

[0041] The mainboard 3 is fixed to the inner wall of the housing 1 by screws, a thermal conductive silicone pad is pasted on the back of the mainboard 3, the COMS sensor 2 is connected to the mainboard 3, and the mainboard 3 is also provided with a wiring terminal 11.

[0042] A rubber pad is provided between the communication power supply interface 9 and the housing 1 .

[0043] A concave surface 12 that is recessed inward is disposed on one side of the housing 1 , and a laser protection mirror 13 is disposed on the concave surface 12 and on the laser receiving lens module 5 .

[0044] The laser emitter 6 is connected to the laser limit table 14, and the laser clamping sheet 15 is crimped onto the laser emitter 6. The laser limit table is formed by integral processing of the shell, with a groove in the middle, which has the same diameter as the laser emitter, and can accurately limit the left and right positions of the laser. The laser emitter is placed on the laser limit table, and the laser clamping sheet is fixed to the laser limit table by screws to press the laser so that it does not move.

[0045] The laser protection mirror 13 is provided with an anti-reflection film to reduce the reflection of the laser on the glass surface and increase the laser utilization rate. Silicon rubber is used to bond it to the through hole of the shell to protect the laser from damage and pollution, and at the same time, the shell is sealed.

[0046] The housing 1 is provided with a lens module mounting platform 16 , the lens module mounting platform 16 is provided with a lens module limiting groove, and the laser receiving lens module 5 is connected to the lens module limiting groove to achieve precise installation and positioning.

[0047] A square platform 17 is arranged in the housing 1 , and a limiting groove is arranged in the square platform 17 . The bottom of the image receiving lens is connected to the limiting groove, and the rear end of the image receiving lens is connected to the fill light circuit board 20 .

[0048] The housing 1 is provided with a plurality of through holes 18 and mounting holes 19 , a plurality of LED fill lights are connected to the fill light circuit board 20 through the through holes 18 , and the image receiving protection window is installed in the mounting holes 19 .

[0049] The reflector 7 and the half-reflecting half-mirror 8 are respectively located between the main board 3 and the laser receiving lens module 5, and between the main board 3 and the image receiving lens module 4. The reflector 7 is connected to the reflector base, and the half-reflecting half-mirror 8 is connected to the lens base.

[0050] A reflector base is processed on the shell, and the reflector is glued to the reflector base with glue, with the reflective surface facing outward. A half-reflecting and half-mirror base is processed on the shell, and the half-reflecting and half-mirror is glued to the half-reflecting and half-mirror base with the reflective surface facing the direction of the reflector. When the laser reflected by the object is received by the laser receiving lens module, it is directed to the reflector. The reflector reflects the laser to the half-reflecting and half-mirror, and the half-reflecting and half-mirror then reflects the laser to the COMS sensor, thereby realizing the reception and sensing of the reflected laser.

[0051] There are 4 through holes on the front end of the shell, and the LED fill light is installed in the through holes and fixed with glue to achieve the fixation of the fill light and the sealing of the shell; the LED transmits optical fiber to illuminate the surface of the object to be measured, and the optical fiber reflected by the surface of the object to be measured passes through the image receiving lens and shines on the semi-reflective and semi-mirror light-transmitting surface, and then shines on the COMS sensor, realizing the reception and sensing of the object image light.

[0052] Working principle: By placing the reflector and the semi-reflective and semi-transparent mirror between the main board and the laser receiving lens module, and between the main board and the image receiving lens module respectively, and through a special optical path structure, the laser receiving lens module and the image receiving lens module share a COMS sensor. This solution not only realizes the visual positioning function of dynamic objects, but also reduces the cost of ranging sensors. By setting up LED fill lights, there is no need to add additional light sources during image acquisition, which reduces costs and occupancy. In addition, the laser and image receiving lens modules are combined and calibrated at the factory. Subsequent installation does not require the relative position relationship between the laser and the image sensor to be calibrated, making installation more convenient, the structure more compact, and reducing maintenance costs.

[0053] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A sympathetic laser image fusion distance sensing device, characterized in that: It includes a shell, and the inner walls on both sides of the shell are provided with a COMS sensor, a main board, an image receiving lens module, a laser receiving lens module and a laser transmitter. A reflector and a half-reflective half-mirror are provided in the middle position of the shell, a communication power supply interface is provided at the side end of the shell, and an upper cover is provided on the shell.

2. The sympathetic laser image fusion distance sensor device according to claim 1, characterized in that: The mainboard is fixed to the inner wall of the housing by screws, a thermal conductive silicone pad is pasted on the back of the mainboard, the COMS sensor is connected to the mainboard, and the mainboard is also provided with a wiring terminal.

3. The sympathetic laser image fusion distance sensor device according to claim 2, characterized in that: A rubber pad is arranged between the communication power supply interface and the housing.

4. The sympathetic laser image fusion distance sensor device according to claim 1, characterized in that: A concave surface that is recessed inward is arranged on one side of the shell, and a laser protection mirror is arranged on the concave surface and on the laser receiving lens module.

5. The sympathetic laser image fusion distance sensor device according to claim 1, characterized in that: The laser emitter is connected to the laser limiting platform, and the laser pressing sheet is pressed onto the laser emitter.

6. The sympathetic laser image fusion distance sensor device according to claim 6, characterized in that: The laser protection mirror is provided with an anti-reflection film.

7. The sympathetic laser image fusion distance sensor device according to claim 1, characterized in that: A lens module mounting platform is arranged in the shell, a lens module limiting groove is arranged on the lens module mounting platform, and the laser receiving lens module is connected to the lens module limiting groove.

8. The sympathetic laser image fusion distance sensor device according to claim 7, characterized in that: A square platform is arranged in the shell, a limiting groove is arranged in the square platform, the bottom of the image receiving lens is connected to the limiting groove, and the rear end of the image receiving lens is connected to the fill light circuit board.

9. The sympathetic laser image fusion distance sensor device according to claim 7, characterized in that: The shell is provided with a plurality of through holes and mounting holes, a plurality of LED fill lights are connected to the fill light circuit board through the through holes, and the image receiving protection window is installed in the mounting holes.

10. The sympathetic laser image fusion distance sensor device according to claim 7, characterized in that: The reflector and the half-reflecting half-mirror are respectively located between the main board and the laser receiving lens module, and between the main board and the image receiving lens module. The reflector is connected to the reflector base, and the half-reflecting half-mirror is connected to the lens base.