A coaxial measuring instrument for laser nozzles

Abstract

This utility model discloses a coaxial measuring instrument for laser nozzles, comprising: a hollow housing with a multi-functional lens protective cover connected to the top and a base plate connected to the bottom; an image acquisition module disposed inside the housing, the image acquisition module including a high-resolution camera for acquiring images of the laser nozzle and a high-resolution lens located above the high-resolution camera; an image analysis processor control board disposed inside the housing and electrically connected to the high-resolution camera for analyzing and calculating the acquired images; a display screen disposed on the housing and electrically connected to the image analysis processor control board for displaying the images and analysis and calculation results; and at least one mounting mechanism connected to the base plate for fixing the housing. The coaxial measuring instrument for laser nozzles provided by this utility model has a reasonable structural design, high integration, and can achieve automated and accurate measurement.

Description

Technical Field

[0001] This utility model relates to the technical field of laser processing equipment accessories, specifically to a measuring instrument for detecting the coaxiality of the laser head nozzle and the laser beam, and in particular to a laser nozzle coaxial measuring instrument that integrates artificial intelligence image recognition algorithm and is capable of fully automatic and high-precision analysis. Background Technology

[0002] In precision machining applications such as laser cutting and welding, the central axis of the laser beam must be perfectly aligned with the central axis of the nozzle at the end of the laser head, maintaining good coaxiality. Poor coaxiality can lead to problems such as tilted cut surfaces, slag buildup, burnt edges, or weak welds, severely impacting processing quality and efficiency.

[0003] Currently, the most commonly used coaxial calibration method in the industry is the "transparent tape method." This method involves attaching a piece of transparent tape to the end face of the laser head nozzle, then emitting a short, low-power laser beam that burns a small hole in the tape. The operator then peels off the tape and subjectively judges the coaxiality by visually observing the relative position of the burned hole and the circular indentation left by the nozzle on the tape.

[0004] This traditional method has inherent and insurmountable flaws: The entire process relies on human observation and subjective judgment, which introduces significant errors and is completely unacceptable for the stringent coaxiality requirements of modern high-precision machining. Because accuracy cannot be guaranteed, operators must rely on experience and use tools such as wrenches to repeatedly adjust and test the lenses manually, a tedious, time-consuming, and extremely inefficient process.

[0005] The quality of calibration results is directly linked to the skill level and experience of the operators, requiring a very high level of technical background from the personnel, relying on the operator's experience, and the consistency of calibration results among different personnel is poor.

[0006] This method can only roughly determine coaxiality and cannot evaluate key quality indicators such as the roundness and internal cleanliness of the light spot. Therefore, it cannot detect the problem of reduced beam quality caused by dirty or damaged lenses.

[0007] Therefore, developing an automated, high-precision, and easy-to-operate coaxial measurement device for laser nozzles to replace the outdated manual calibration method is a technical problem that urgently needs to be solved in this field. Utility Model Content

[0008] The purpose of this invention is to address the problems of low accuracy, poor efficiency, complex operation, and limited functionality of manual calibration in the background technology by providing a coaxial laser nozzle measuring instrument with a reasonable structural design, high integration, and the ability to achieve automated and accurate measurement.

[0009] To achieve the above objectives, the present invention adopts the following technical solution: A coaxial measuring instrument for laser nozzles includes: a hollow housing, a multi-functional lens protective cover connected to the top of the housing, and a base plate connected to the bottom of the housing; characterized in that it further includes: An image acquisition module is disposed inside the housing. The image acquisition module includes a high-resolution camera for acquiring images of the laser head nozzle and a high-resolution lens located above the high-resolution camera. An image analysis processor control board is disposed inside the housing and electrically connected to the high-resolution camera for analyzing and calculating the acquired images; A display screen is disposed on the housing and electrically connected to the image analysis processor control board for displaying the image and analysis calculation results; At least one mounting mechanism is attached to the base plate for securing the housing.

[0010] As a preferred embodiment, the image analysis processor control board also integrates a wireless signal transmission module (such as a WiFi and Bluetooth circuit board) to wirelessly transmit the calculated coordinate deviation and other results to an external display terminal or directly to the electric adjustment mechanism of the laser device.

[0011] As a preferred embodiment, an adjustable illumination source is also included. The adjustable illumination source is disposed inside the housing and surrounds the high-resolution lens to provide supplemental illumination for the laser head nozzles of different materials and colors, ensuring that a clear and visible image is captured.

[0012] As a preferred embodiment, a gyroscope control circuit board is also included, which is disposed inside the housing and located below the image analysis processor control board, and is electrically connected to the image analysis processor control board. The gyroscope is used to detect in real time whether the housing is in a horizontal state, thereby avoiding image distortion caused by tilted installation of the device and ensuring the accuracy of analysis and calculation.

[0013] As a preferred embodiment, the mounting mechanism includes several adjustable support legs evenly distributed along the circumference of the base plate, and a powerful magnet connection screw located at the center of the base plate. The adjustable support legs are used for fine-tuning the level and height of the equipment, while the powerful magnet connection screw can be connected to a powerful magnet to firmly attach the equipment to the position to be measured, preventing vibration and displacement.

[0014] As a preferred embodiment, the multi-functional camera protective cover is screwed onto the top of the housing to protect internal optical components such as the lens. The protective cover has a laser positioning hole for a positioning laser to pass through, and also features markings to assist in installation alignment.

[0015] As a further improvement to the above solution, the multi-functional camera protective cover is also provided with a visual inspection area for visually inspecting light spots, providing the operator with a quick auxiliary judgment means to detect the roundness and impurities of the light spots.

[0016] As a preferred embodiment, a power module is also included, which is disposed inside the housing and electrically connected to the image analysis processor control board to provide power to the entire device. The power module includes a battery and a battery compartment for housing the battery to enable portable operation.

[0017] As a preferred embodiment, the housing is further provided with a camera mounting plate base for fixing the high-resolution camera and a camera lens mounting plate for fixing the high-resolution lens, the camera lens mounting plate being mounted on the camera mounting plate base.

[0018] As a preferred embodiment, the housing is further provided with multiple circuit board support columns, and the camera mounting plate base plate, image analysis processor control board and gyroscope control circuit board are fixed and separated by the circuit board support columns.

[0019] Compared with the prior art, the beneficial effects of this utility model are: (1) This utility model integrates high-resolution camera, processor, display screen, gyroscope and other components into an integrated housing, and automatically analyzes the image through artificial intelligence algorithm to achieve high-precision and real-time calculation of coaxiality, which greatly improves the efficiency and accuracy of calibration.

[0020] (2) This utility model enables operators to easily complete precision calibration without professional experience through an intuitive display interface and automated analysis process, effectively reducing the reliance on highly skilled personnel.

[0021] (3) The equipment solution provided by this utility model can not only detect coaxiality, but also help judge the health status of the lens by analyzing the roundness and impurities of the light spot. At the same time, the gyroscope ensures the accuracy of the measurement benchmark, and the combination of strong magnet and adjustable support leg also provides a stable and reliable installation guarantee. Attached Figure Description

[0022] Figure 1 This is an exploded structural diagram of the present invention; Figure 2 This is a three-dimensional structural schematic diagram of the present invention; Figure 3 This is a schematic diagram of the bottom structure of this utility model; Figure 4 This is a schematic diagram of the internal structure of this utility model; Figure 5This is a schematic diagram of the image acquisition module of this utility model; Figure 6 This is a structural schematic diagram of the multifunctional camera protective cover of this utility model; Figure 7 This is a schematic diagram of the bottom structure of the multifunctional camera protective cover of this utility model; The markings in the diagram are as follows: 1-Base plate, 2-Adjustable support leg, 3-Display screen, 4-Multi-functional camera protective cover, 5-House, 6-Battery, 7-Battery box, 8-Heat insulation plate, 9-Heat insulation plate support column, 10-Gyroscope control circuit board, 11-Image analysis processor control board, 12-High-resolution camera, 13-Adjustable lighting source, 14-Circuit board support column, 15-Camera mounting plate base plate, 16-Lens, 17-Laser positioning hole, 18-Camera lens mounting plate, 19-Visual inspection area, 20-Power switch, 21-High-resolution lens, 22-Ring indicator light, 23-Strong magnet connecting screw, 24-Working area. Detailed Implementation

[0023] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings. However, it should be noted that these embodiments are not intended to limit the present invention. Equivalent transformations or substitutions in function, method, or structure made by those skilled in the art based on these embodiments are all within the protection scope of the present invention.

[0024] like Figures 1-7 As shown, the embodiment of this utility model provides a coaxial measuring instrument for laser nozzles, the overall structure of which is integrated into a compact housing 5.

[0025] The bottom of the housing 5 is fixedly connected to a base plate 1 by screws or other means. To achieve stable and flexible installation, two types of installation mechanisms are provided on the base plate 1. One is multiple (three in this embodiment) adjustable support legs 2 evenly distributed around the circumference of the base plate 1. The height and level of the instrument can be finely adjusted by rotating the support legs 2.

[0026] Secondly, a powerful magnet connection screw 23 is set at the geometric center of the base plate 1. This screw can be screwed to a powerful magnet with a large attraction force (not shown in the figure), so that the entire device can be conveniently and firmly adsorbed onto the metal surface.

[0027] Inside the housing 5, the core functional modules of this device are arranged from top to bottom. The top layer is the image acquisition module, which consists of a high-resolution camera 12 and a high-resolution lens 21. To securely mount them, a camera mounting base plate 15 and a camera lens mounting plate 18 are also provided inside. Directly above the image acquisition module is a rotatable multi-functional camera protective cover 4, which is screwed onto the housing 5. The multi-functional lens cover 4 has two fan-shaped openings, one laser positioning hole 17, and one blank area. One is a through-hole fan-shaped opening (working area 24), and the other is a non-through-hole opening (visual inspection area 19). The entire cover is divided into four working areas that rotate around a central axis.

[0028] When the non-through-aperture area (visual inspection area 19) is rotated to be directly above the lens, the positioning red light shines precisely on this fan-shaped platform, forming a light spot. It will not illuminate the lens. Simultaneously, this visual inspection area 19 is used for visual inspection of the roundness and impurities of the light spot.

[0029] When the through-aperture area (working area 24) is rotated to be directly above the lens, the positioning red light can directly illuminate the lens. This through-aperture area is the working area 24 during camera inspection.

[0030] When the laser positioning hole 17 is rotated to be directly above the lens, align the laser positioning hole 17 with the positioning red light to correct the placement of the coaxial instrument.

[0031] When the blank area is rotated to directly above the lens, it is equivalent to stopping use and serves to protect the lens.

[0032] An adjustable illumination source 13 is arranged around the image acquisition module. Specifically, the adjustable illumination source 13 is arranged around the high-resolution lens 21. The adjustable illumination source 13 is a ring-shaped LED light that can emit light at different brightness, color and angle to provide clear supplementary lighting for the laser nozzle within the field of view, ensuring that the high-resolution camera 12 can capture high-quality images.

[0033] The core computing unit of the device is the image analysis processor control board 11. It is electrically connected to the high-resolution camera 12 via a ribbon cable and receives real-time image data streams acquired by the camera. The image analysis processor control board 11 incorporates a high-performance embedded processor and artificial intelligence image recognition algorithms, which can identify the circular outline of the nozzle and the spot of the positioning red light from the image in real time, and accurately calculate the center coordinates of the two, thereby obtaining the coaxiality deviation value.

[0034] Meanwhile, the image analysis processor control board 11 also drives the display screen 3 mounted on the surface of the housing 5, intuitively displaying real-time images, analysis results, and the user interface to the user. Furthermore, the control board 11 integrates WiFi and Bluetooth modules, enabling wireless data transmission.

[0035] To ensure measurement accuracy, a separate gyroscope control circuit board 10 is installed below the image analysis processor control board 11. The gyroscope sensor on this circuit board is used to monitor whether the device is placed horizontally in real time, and sends the attitude data to the processor control board 11 to provide prompts on the display screen 3, guiding the user to adjust the support legs 2 to level the device.

[0036] The two core circuit boards are reliably fixed and separated by multiple circuit board support pillars 14, ensuring the stability of the internal structure. The device is powered by an internal power module, which includes multiple rechargeable batteries 6 and a battery box 7 for housing the batteries, ensuring that the device can be used portablely without an external power cord.

[0037] Based on the laser coaxial measuring instrument provided by the above-mentioned utility model, a method for using the laser coaxial measuring instrument is proposed: Installation: Screw the strong magnet into the strong magnet connection screw 23, and then attach the entire device to the bottom of the laser head so that the nozzle is roughly in the center of the device's field of view.

[0038] Powering on and leveling: Press the power switch 20 to start the device. Observe the level indicator on the display screen 3 (data provided by the gyroscope control circuit board 10), and fine-tune the adjustable support leg 2 until the device is completely level.

[0039] Positioning: Align the laser head with the high-resolution lens 21, then make the laser head emit positioning red light, rotate the multi-functional camera protective cover 4 until the positioning red light passes through the laser positioning hole 17, which plays a role in correcting the positioning.

[0040] Measurement and Analysis: The laser head emits a positioning red light. At this time, the adjustable illumination source (13) illuminates the nozzle, and the high-resolution camera 12 simultaneously captures the nozzle outline and the red light spot, and transmits the image to the image analysis processor control board 11 in real time. The processor automatically calculates the deviation between the nozzle center and the center of the light spot, and updates the result (such as the XY coordinate deviation value) on the display screen 3 in real time.

[0041] Adjustment: The operator adjusts the laser head lens based on the deviation data displayed on the screen. Alternatively, the device can wirelessly transmit the deviation data to the laser equipment's control system for automatic adjustment. During the adjustment process, the deviation value changes in real time until it falls within the acceptable range.

[0042] Completed: After calibration, turn off the power and remove the device.

[0043] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A laser nozzle coaxiality gauge, comprising: The shell (5) is hollow inside, with a multi-functional camera protective cover (4) connected to the top and a base plate (1) connected to the bottom. It is characterized by further comprising: An image acquisition module is disposed inside the housing (5). The image acquisition module includes a high-resolution camera (12) for acquiring images of the laser head nozzle and a high-resolution lens (21) located above the high-resolution camera (12). An image analysis processor control board (11) is disposed inside the housing (5) and electrically connected to the high-resolution camera (12) for analyzing and calculating the acquired images; A display screen (3) is disposed on the housing (5) and electrically connected to the image analysis processor control board (11) for displaying the image and analysis calculation results; At least one mounting mechanism is attached to the base plate (1) for securing the housing (5).

2. A laser nozzle coaxial measuring instrument according to claim 1, characterized in that, The image analysis processor control board (11) also integrates a wireless signal transmission module for sending the analysis and calculation results to an external terminal.

3. A laser nozzle coaxial measuring instrument according to claim 1, characterized in that, It also includes an adjustable lighting source (13), which is disposed inside the housing (5) and surrounds the high-resolution lens (21) for illuminating the laser head nozzle.

4. The laser nozzle coaxial measuring instrument of claim 1, wherein, It also includes a gyroscope control circuit board (10), which is disposed inside the housing (5) and located below the image analysis processor control board (11), and is electrically connected to the image analysis processor control board (11) for detecting the horizontal state of the housing (5).

5. The laser nozzle coaxiality gauge of claim 1, wherein, The installation mechanism includes several adjustable support legs (2) evenly distributed around the base plate (1) and a powerful magnet connection screw (23) located at the center of the base plate (1).

6. A laser nozzle coaxial measuring instrument according to claim 1, characterized in that, The multi-functional camera protective cover (4) is screwed onto the top of the housing (5), and the multi-functional camera protective cover (4) is provided with a laser positioning hole (17) for the positioning laser to pass through.

7. A laser nozzle coaxial measuring instrument according to claim 6, wherein, The multi-functional camera protective cover (4) is also provided with a visual inspection area (19) for visually inspecting light spots.

8. The laser nozzle coaxial measuring instrument of claim 1, wherein, It also includes a power module disposed inside the housing (5) and electrically connected to the image analysis processor control board (11). The power module includes a battery (6) and a battery box (7) that houses the battery (6).

9. A laser nozzle coaxial measuring instrument according to claim 4, wherein, The housing (5) is further provided with a camera mounting plate base plate (15) for fixing the high-resolution camera (12) and a camera lens mounting plate (18) for fixing the high-resolution lens. The camera lens mounting plate (18) is mounted on the camera mounting plate base plate (15).

10. A laser nozzle coaxial measuring instrument according to claim 9, wherein, The housing (5) is also provided with multiple circuit board support columns (14), and the camera mounting plate base plate (15), the image analysis processor control board (11) and the gyroscope control circuit board (10) are fixed and separated by the circuit board support columns (14).

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