Active light-emitting mark point for vision measurement

Abstract

The invention belongs to the technical field of vision measurement, and particularly relates to an active light-emitting mark point for vision measurement, which comprises an optical identification module comprising a light scattering plate and an optical identification pattern arranged on the surface of the light scattering plate, and the optical identification pattern integrates unique coding information; the light-emitting module is composed of a light-emitting lamp panel and a power supply circuit, and the light-emitting lamp panel comprises an LED light source and a COB area light source and can adapt to different measurement scenes to output variable power and multiple wavelengths according to needs; and the shell is provided with mounting positions matched with the light scattering plate and the light emitting lamp panel, so that modular packaging is realized. Through the arrangement of the optical identification module, the light-emitting module and the shell assembly, unique coding information carried by an optical identification pattern enables a single mark point to have an independent identity recognition capability, and multi-point topology matching dependence is eliminated.

Description

Technical Field

[0001] The present invention belongs to the technical field of visual measurement, and in particular relates to an active luminous marking point for visual measurement. Background Art

[0002] Vision measurement technology, a measurement method based on image information processing, uses cameras to capture the image features of markers, thereby calculating key parameters such as displacement and deformation. Due to its non-contact and high-precision advantages, it has been widely used in many fields, including industrial automation inspection, bridge construction monitoring, and robot navigation. In existing technologies, markers can be mainly categorized as passive or active, depending on their illumination type.

[0003] Passive markers rely on ambient light reflections to generate images. In low-light environments, the intensity of the reflected light is limited, resulting in blurred images and making it difficult to meet high-precision measurement requirements. Additional supplemental lighting equipment is often required. Furthermore, complex and changing ambient light can easily interfere with the reflected images, introducing significant errors in image feature extraction and severely impacting the accuracy of measurement results.

[0004] Most existing solutions for active markers use fixed geometric light sources. This design makes the optical identification form extremely simple and can only support the application of specific fixed-shape light sources. Multi-point matching requires reliance on complex methods such as topological relationships and cross-ratio invariance. The recognition speed is slow and the efficiency is low. It is also easy to have matching errors due to the unrelated image points. Once an error occurs, it will affect subsequent processes such as pose solution. In addition, the existing matching methods have high requirements for the site, number and configuration of image points, and their applicability is limited. For example, some methods cannot continue to match when the sign is obscured. In addition, in terms of power supply and control, existing active markers have the problem of low integration and generally lack power monitoring and remote control functions. This greatly limits their operability and convenience in actual engineering applications, making it difficult to adapt to the complex and changing requirements of engineering environments.

[0005] In view of the many problems existing in the marking points in the above-mentioned prior art, there is an urgent need to develop an active luminous marking point with diversified optical identification, intelligent control functions and high environmental adaptability. Summary of the Invention

[0006] The purpose of the present invention is to address the above-mentioned technical problems and provide an active luminous marking point for visual measurement, which effectively improves the reliability and convenience of the visual measurement system and promotes the application and development of visual measurement technology in various fields.

[0007] In view of this, the present invention provides an active luminous marking point for visual measurement, comprising: An optical identification module, comprising a diffuser plate and an optical identification pattern provided on the surface of the diffuser plate, wherein the optical identification pattern integrates unique coding information; The light-emitting module consists of a light-emitting lamp board and a power circuit. The light-emitting lamp board includes an LED light source and a COB surface light source, which can adapt to different measurement scenarios and output variable power and multiple wavelengths on demand; The shell assembly is provided with mounting positions matching the diffuser panel and the light panel to achieve modular packaging.

[0008] Preferably, the type of the optical identification pattern includes at least one of a speckle mark, a QR code, and a coded circle.

[0009] Preferably, heat dissipation fins are provided on the back of the light emitting lamp panel.

[0010] Preferably, the housing assembly is a rectangular box structure and is integrally formed of aluminum alloy or engineering plastic.

[0011] Preferably, the interior of the housing assembly is further provided with: Power supply module, including battery and wired power interface; The wired power interface has the following functions: Directly provide working power for the light-emitting module; When connected to an external power source, the battery is charged.

[0012] Preferably, the wired power interface adopts an interface that complies with the Universal Serial Bus Type-C specification or a DC power interface.

[0013] Preferably, the interior of the housing assembly is further provided with: The control module is composed of a control circuit and a wireless switch controller; The control circuit integrates: Automatic brightness adjustment module: collects ambient light intensity in real time through the light sensor and dynamically adjusts the output power of the light panel; Wireless communication module: supports Bluetooth protocol or infrared transmission protocol to establish a data link with the external control terminal; The wireless switch controller is compatible with mobile terminal APP or dedicated remote control commands to achieve the following remote control functions: Power on / off control; Brightness level adjustment; Lighting mode switching, including constant light mode, synchronous flashing mode and coded timing light mode; The control circuit is electrically connected to the light panel and outputs a PWM signal to drive the light source to operate in a configured mode.

[0014] Preferably, the diffuser plate is integrally formed of acrylic or PET diffusion material, the optical identification pattern is formed on the light-transmitting area of ​​the diffuser plate by photolithography or spraying, and the diffuser plate is bonded to the light-emitting lamp panel to ensure uniform light emission.

[0015] Preferably, a power display module is provided on the surface of the housing component, and the power display module is electrically connected to the control circuit, and displays the remaining battery power in real time through an LED indicator light, and automatically triggers a flashing prompt when the power is low.

[0016] Preferably, a quick-release assembly is provided at the bottom of the housing assembly.

[0017] The beneficial effects of the present invention are: Through the optical identification module, light-emitting module and housing assembly, the unique coding information carried by the optical identification pattern enables a single marking point to have independent identity recognition capabilities, eliminating the reliance on multi-point topology matching; The multi-wavelength light source (LED+COB) and variable power output of the light module improve the device's adaptability in complex scenarios such as strong light interference and long-distance measurement; The modular packaging structure of the housing assembly ensures the stability of the optical path, allowing the coded pattern to form a high-contrast, distortion-free optical signal source under illumination, providing the basic conditions for visual solution. In addition, different types of coded markers can be replaced according to different measurement requirements to improve measurement flexibility and robustness. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a first perspective perspective schematic diagram of the present invention; Figure 2 is a second perspective perspective schematic diagram of the present invention; Figure 3 This is a schematic diagram of the upper cover of the present invention being opened; Figure 4 is a schematic diagram of the interior of the lower cover of the present invention; Figure 5 A schematic diagram of the coding mark points; Figure 6 Schematic diagram of coding mark points.

[0019] The marks in the figure are: 1. Housing assembly; 2. Diffuser; 3. Optical identification pattern; 4. Light panel; 5. Mounting position; 6. Control module; 7. Battery; 8. Wired power interface; 9. Battery level display module; 10. Quick-release assembly; 11. Upper cover; 12. Lower cover; 13. Bolts. DETAILED DESCRIPTION

[0020] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0021] It should be noted that all terms used in the present invention to indicate direction and position, such as "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "inside", "outside", "top", "low", "lateral", "longitudinal", "center", etc., are only used to explain the relative positional relationship and connection status between the various components in a certain specific state (as shown in the accompanying drawings). They are only for the convenience of describing the present invention, and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the present invention. In addition, the descriptions of "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features.

[0022] In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical connections; direct connections or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0023] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0024] like Figures 1-6 As shown, an active luminous marker for visual measurement includes: The optical identification module includes a diffuser plate 2 and an optical identification pattern 3 provided on the surface of the diffuser plate 2, wherein the optical identification pattern 3 integrates unique coding information; The light-emitting module is composed of a light-emitting lamp board 4 and a power supply circuit. The light-emitting lamp board 4 includes an LED light source and a COB surface light source, which can adapt to different measurement scenarios and output variable power and multiple wavelengths on demand; The shell assembly 1 includes an upper cover 11 and a lower cover 12, which are connected by bolts 13. The lower cover 12 has a cavity, and a mounting position 5 matching the diffuser plate 2 and the light-emitting light board 4 is provided in the cavity to realize modular packaging. After the diffuser plate 2 and the light-emitting light board 4 are installed, the upper cover 11 is covered and tightened with bolts 13 to complete the installation of the entire active light-emitting marking point.

[0025] Compared with the prior art, the present invention achieves the following effects by synergizing the optical identification module, the light-emitting module and the housing assembly 1: 1. The unique coding information carried by the optical identification pattern 3 enables a single marking point to have independent identity recognition capabilities, eliminating the reliance on multi-point topological matching; 2. The multi-wavelength light source (LED+COB) and variable power output of the light-emitting module improve the adaptability of the device in complex scenarios such as strong light interference and long-distance measurement; 3. The modular packaging structure of the housing component 1 ensures the stability of the optical path, so that the coded pattern forms a high-contrast, distortion-free optical signal source under luminous illumination, providing the basic conditions for visual solution; 4. Different types of coded markers can be replaced according to different measurement requirements to improve measurement flexibility and robustness; 5. Active illumination can be combined with bandpass filtering to effectively suppress ambient light noise. In complex lighting scenarios such as industrial sites and nighttime monitoring, it can still ensure clear imaging of marking points, providing stable and reliable feature identification for visual measurement.

[0026] As a preferred example of the present application, the type of the optical identification pattern 3 includes at least one of a speckle mark, a QR code, and a coded circle; The optical identification pattern 3 is at least one of a speckle mark, a two-dimensional code, and a coding circle, such as Figure 3 As shown in the figure, speckle mark is used as an example. The speckle mark can provide natural texture features and enhance the recognition robustness of reflective surfaces. The QR code embeds high-density coding information to support fast decoding of single-frame images. The coding circle combines geometric center positioning and angle invariance to improve the accuracy of rotating scene solution. The three complement each other to form a cross-scene transferable identification system to meet the needs of multiple scenarios such as industrial detection and motion capture. In addition, the optical identification pattern 3 consists of a positioning area logo and a coding area logo. The positioning area logo and the coding area logo can be designed in a circular or rectangular manner, such as Figure 5 As shown, the combined state is as follows Figure 6 As shown: a is a pattern structure composed of a ring and arc segments, with the ring surrounding a small central circle and intermittent arc segments on the ring; b is a pattern structure with a central circle as the core and several fan-shaped blocks distributed circumferentially; c is a frame formed by lines, with a cross-shaped logo pattern structure inside the frame; d is a pattern structure with multiple groups of arc-shaped blocks distributed in a ring area, with the central blank circle as the center of symmetry; e is a small circle with regular small dots arranged in circles around the center. f is a pattern structure with a large circle at the center and several small circles equidistantly distributed around the circumference; The above-mentioned marking points a, b, c, d, e, and f can be combined in any number and arrangement based on the application scenario requirements to form a marking combination with coding and recognition functions.

[0027] As a preferred example of the present application, the diffuser plate 2 is integrally formed with acrylic or PET diffusion material, and the optical identification pattern 3 is formed on the light-transmitting area of ​​the diffuser plate 2 by photolithography or spraying. The diffuser plate 2 is bonded to the light-emitting lamp panel 4 to ensure uniform light emission. Acrylic / PET diffusion materials ensure that light is evenly diffused across the logo pattern, preventing localized light spots from interfering with code recognition. Photolithography or spraying processes directly form high-precision patterns in the translucent area, eliminating the interfacial refraction errors of traditional film lamination processes. The bonded design of the diffuser plate 2 and the light panel 4 allows the light source energy to be transmitted to the entire logo area, ensuring the sharpness and consistency of the code edges. This ensures the stability and reproducibility of the optical logo from the manufacturing end, guaranteeing image clarity.

[0028] As a preferred example of the present application, heat dissipation fins (not shown in the figure) are provided on the back of the light-emitting lamp board 4. The heat dissipation fins can expand the surface area of ​​the back of the light-emitting lamp board 4 to accelerate heat convection and suppress the temperature rise during high-power output; ensure the wavelength stability of the light source, avoid color deviation or light attenuation of the LED / COB light source due to high temperature, thereby ensuring the decoding accuracy of the optical identification pattern 3.

[0029] As a preferred example of the present application, the housing assembly 1 is a rectangular box structure and is integrally formed of aluminum alloy or engineering plastic. In another embodiment, a cylindrical box design (not shown in the figure) may also be adopted, depending on the product being used and the actual working conditions. The flat mounting position 5 of the rectangular box body aligns the diffuser 2 and the light panel 4 coaxially to avoid optical path deviation caused by the curved structure. When the outer shell component 1 is made of aluminum alloy, its thermal conductivity accelerates the heat dissipation of the light-emitting module. When engineering plastic is used, its lightweight characteristics can reduce the equipment load. It can be selected according to actual working conditions.

[0030] As a preferred example of the present application, the interior of the housing assembly 1 is further provided with: Power supply module, including battery 7 and wired power interface 8; The wired power interface 8 has the following functions: Directly provide working power for the light-emitting module; When an external power source is connected, the battery 7 is charged.

[0031] The battery 7 provides freedom of movement and eliminates the physical constraints of external cables on the measurement field.

[0032] As a preferred example of the present application, the wired power interface 8 adopts an interface that complies with the Universal Serial Bus Type-C specification or a DC power interface; The Type-C interface can integrate power transmission and communication capabilities, providing a physical link for remote control; The DC power interface can cover the industrial-grade voltage range and adapt to non-standard power supply environments such as vehicles and production lines.

[0033] As a preferred example of the present application, the interior of the housing assembly 1 is further provided with: Control module 6, consisting of a control circuit and a wireless switch controller; The control circuit integrates: Automatic brightness adjustment module: collects ambient light intensity in real time through a light sensor and dynamically adjusts the output power of the light panel 4; Wireless communication module: supports Bluetooth protocol or infrared transmission protocol to establish a data link with the external control terminal; The automatic brightness adjustment module works with the light sensor to dynamically balance ambient light interference and energy consumption, ensuring a constant contrast of the logo pattern. The wireless switch controller is compatible with mobile terminal APP or dedicated remote control commands to achieve the following remote control functions: Power on / off control; Brightness level adjustment; Lighting mode switching, including constant light mode, synchronous flashing mode and coded timing light mode; The wireless communication module supports multi-device group control, making the synchronous flashing / coded timing lighting accurately match the camera's exposure cycle; Wireless brightness control and on / off control, combined with power monitoring, reduces manual intervention, lowers operation and maintenance costs, and significantly improves operational convenience. The control circuit is electrically connected to the light panel 4 and outputs a PWM signal to drive the light source to work in the configured mode. The PWM drive mechanism can ensure that there is no stroboscopic interference when the light-emitting mode is switched, and maintain the time domain stability of the optical signal.

[0034] As a preferred example of the present application, a power display module 9 is provided on the surface of the housing component 1. The power display module 9 is electrically connected to the control circuit and displays the remaining power of the battery 7 in real time through an LED indicator light. When the power is low, a flashing prompt is automatically triggered.

[0035] As a preferred example of the present application, a quick-release assembly 10 is provided at the bottom of the housing assembly 1. The quick-release assembly 10 can adopt a magnetic base or a threaded mounting hole to adapt to quick installation scenarios such as metal surfaces and brackets.

[0036] In practical applications, this embodiment addresses the problem that ROI (region of interest) selection in visual measurement often relies on manual annotation, which is inefficient and easily influenced by subjective factors. Semantic segmentation technology is used to automatically identify the target area from a two-dimensional image with a complex background, thus automating ROI extraction. A box shape that is easy to install and automatically identify is selected based on the usage scenario. A pre-trained semantic segmentation model is used to segment and identify the markers in the scene. This application can provide the following for the above-mentioned recognition process: The unique coding information carried by the optical identification pattern 3 enables a single marking point to have independent identity recognition capabilities, eliminating the reliance on multi-point topology matching; The multi-wavelength light source (LED+COB) and variable power output of the light module improve the device's adaptability in complex scenarios such as strong light interference and long-distance measurement; The modular packaging structure of the housing assembly 1 ensures the stability of the optical path, so that the coded pattern forms a high-contrast, distortion-free optical signal source under luminous illumination, providing the basic conditions for visual solution; Different types of coded marking points can be replaced according to different measurement requirements (you can choose to replace the local structure in this application, that is, replace the diffuser plate 2 alone, or directly replace it with another application with a different coded pattern), improving measurement flexibility and robustness; Active illumination can be combined with bandpass filtering to effectively suppress ambient light noise. In complex lighting scenarios such as industrial sites and nighttime monitoring, it can still ensure clear imaging of marking points, providing stable and reliable feature identification for visual measurement.

[0037] The embodiments of the present application are described above in conjunction with the accompanying drawings. Unless there is a conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. An active luminous marker for visual measurement, characterized by: include: An optical identification module comprises a light diffusion plate (2) and an optical identification pattern (3) provided on the surface of the light diffusion plate (2), wherein the optical identification pattern (3) integrates unique coding information; The light emitting module is composed of a light emitting lamp board (4) and a power supply circuit. The light emitting lamp board (4) includes an LED light source and a COB surface light source, and can output variable power and multiple wavelengths as needed to adapt to different measurement scenarios; A housing assembly (1) is provided with a mounting position (5) that matches the light-scattering plate (2) and the light-emitting lamp panel (4), thereby realizing modular packaging.

2. The active luminous marking point for visual measurement according to claim 1, characterized in that: The type of the optical identification pattern (3) includes at least one of a speckle mark, a two-dimensional code, and a coding circle.

3. The active luminous marking point for visual measurement according to claim 1, characterized in that: Heat dissipation fins are provided on the back of the light emitting lamp panel (4).

4. The active luminous marking point for visual measurement according to claim 3, characterized in that: The housing component (1) is a rectangular box structure, and the housing component (1) is integrally formed using aluminum alloy or engineering plastic material.

5. The active luminous marking point for visual measurement according to claim 4, characterized in that: The interior of the housing component (1) is further provided with: A power supply module, comprising a battery (7) and a wired power interface (8); The wired power interface (8) has the following functions: Directly provide working power for the light-emitting module; When an external power source is connected, the battery (7) is charged.

6. The active luminous marking point for visual measurement according to claim 5, characterized in that: The wired power interface (8) adopts an interface that complies with the Universal Serial Bus Type-C specification or a DC power interface.

7. The active luminous marking point for visual measurement according to claim 6, characterized in that: The interior of the housing component (1) is further provided with: A control module (6), consisting of a control circuit and a wireless switch controller; The control circuit integrates: Automatic brightness adjustment module: collects ambient light intensity in real time through a light sensor and dynamically adjusts the output power of the light panel (4); Wireless communication module: supports Bluetooth protocol or infrared transmission protocol to establish a data link with the external control terminal; The wireless switch controller is compatible with mobile terminal APP or dedicated remote control commands to achieve the following remote control functions: Power on / off control; Brightness level adjustment; Lighting mode switching, including constant light mode, synchronous flashing mode and coded timing light mode; The control circuit is electrically connected to the light panel (4) and outputs a PWM signal to drive the light source to operate in a configured mode.

8. The active luminous marking point for visual measurement according to claim 2, characterized in that: The diffuser plate (2) is integrally formed of acrylic or PET diffusion material, the optical identification pattern (3) is formed on the light-transmitting area of ​​the diffuser plate (2) by photolithography or spraying, and the diffuser plate (2) is fitted with the light-emitting lamp panel (4) to ensure uniform light emission.

9. The active luminous marking point for visual measurement according to claim 7, characterized in that: A power display module (9) is provided on the surface of the housing component (1). The power display module (9) is electrically connected to the control circuit and displays the remaining power of the battery (7) in real time through an LED indicator light. When the power is low, a flashing prompt is automatically triggered.

10. The active luminous marking point for visual measurement according to claim 9, characterized in that: A quick-install component (10) is provided at the bottom of the housing component (1).

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