A portable variable focal length optical projection detection instrument

Abstract

This utility model discloses a convenient variable focal length optical projection inspection instrument, relating to the field of optical projection inspection technology. It includes an aluminum shell, which comprises a housing. A sealing plate is movably connected to the front and rear of the housing. A handle is fixed to the top of the housing. An inspection component capable of measuring the surface of shaft components is assembled inside the aluminum shell. The inspection component includes a lithium battery installed at the bottom of the housing. This utility model utilizes a dual precision lead screw fine-tuning mechanism (focal length fine-tuning mechanism and sharpness fine-tuning mechanism) for stable and precise adjustment (micrometer level), requiring no professional skills and allowing on-site personnel to quickly learn how to use it. A stable parallel light source and a double-angle prism optical path design ensure uniform illumination and a stable optical path. Combined with a high-definition camera, the microscopic features of the workpiece surface are clearly discernible. Independent lithium battery power supply and on-site measurement and analysis perfectly adapt to real-time inspection scenarios on production lines, facilitating dynamic quality control.

Description

Technical Field

[0001] This utility model relates to the field of optical projection testing, specifically a convenient variable focal length optical projection testing instrument. Background Technology

[0002] Optical inspection instruments are devices that use optical principles to detect common defects encountered in the production of precision parts. The machine inspects the product through an eyepiece, compares the qualified parameters of the product, and through human observation and image processing, detects defects on the product and displays the product parameters on a monitor for maintenance personnel to make corrections.

[0003] Currently, existing optical inspection instruments have the following drawbacks: they are highly accurate but bulky, inconvenient to carry, and expensive, making them difficult to adapt to the needs of "instant measurement and judgment" on-site; they are also crude to operate, with problems such as blurry images, difficulty in adjustment, and insufficient accuracy, making it impossible to effectively analyze surface micro-features.

[0004] Therefore, there is an urgent need to develop a portable, low-cost, easy-to-operate, and high-precision on-site testing instrument. Utility Model Content

[0005] Based on this, the purpose of this utility model is to provide a convenient variable focal length optical projection testing instrument to solve the technical problems mentioned in the background.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a portable variable focal length optical projection inspection instrument, comprising an aluminum shell, the aluminum shell including a housing, a sealing plate movably connected to the front and rear of the housing, a handle fixed to the top of the housing, and an inspection component capable of measuring the surface of shaft components assembled inside the aluminum shell;

[0007] The detection assembly includes a lithium battery installed at the bottom of the housing. Below the lithium battery is a bracket connected to the housing. The bracket includes a U-shaped main frame. A stable parallel light source capable of providing supplemental lighting for the shaft is mounted at one end of the U-shaped main frame. A lens is mounted at the other end of the U-shaped main frame. A lens angle adjustment lens is connected to the bottom of the lens. A high-definition vision camera is mounted at the top of the lens angle adjustment lens. A light source angle adjustment lens capable of reflecting light into the lens angle adjustment lens is located at the bottom of the stable parallel light source. A focus fine-tuning mechanism is provided on the upper surface of the U-shaped main frame. A sharpness fine-tuning mechanism capable of pulling the U-shaped main frame up and down is mounted above the focus fine-tuning mechanism.

[0008] As a preferred technical solution, the bottom of the housing is bolted to a V-shaped plate, and the inclined upper surface of the V-shaped plate is provided with two sets of long straight grooves for light to pass through.

[0009] As a preferred technical solution, the two sets of sealing plates are detachably connected to the front and rear of the housing by screws. The surface of the sealing plate on the front side is provided with two sets of relief grooves for rotating the surface knobs of the focus fine adjustment mechanism and the sharpness fine adjustment mechanism.

[0010] As a preferred technical solution, the outer walls of both the light source cornering lens and the lens cornering lens are fixed with lens supports, and the top of the lens supports is connected to the bottom of the U-shaped main frame with screws.

[0011] As a preferred technical solution, both ends of the U-shaped main frame are provided with end blocks that can fix and stabilize the parallel light source and the lens, and the end blocks are fixed to the end face of the U-shaped main frame with bolts.

[0012] As a preferred technical solution, the upper surface of the U-shaped main frame is welded with a vertical plate, and one side of the vertical plate is provided with a positioning piece fixedly connected to the inner wall of the shell. The clarity fine-tuning mechanism is assembled between the vertical plate and the positioning piece.

[0013] As a preferred technical solution, the side wall of the housing is equipped with a USB data interface, which can export the images captured by the high-definition vision camera to an external device.

[0014] In summary, the present invention has the following main advantages:

[0015] This invention utilizes a dual precision lead screw fine-tuning mechanism (focus fine-tuning mechanism and sharpness fine-tuning mechanism) to achieve stable and precise adjustment (micrometer level), requiring no professional skills and allowing on-site personnel to quickly learn how to use it. A stable parallel light source and a double-corner prism optical path design ensure uniform illumination and a stable optical path. Combined with a high-definition camera, the microscopic features of the workpiece surface are clearly discernible. Independent lithium battery power supply and on-site measurement and analysis perfectly adapt to real-time production line monitoring scenarios, facilitating dynamic quality control. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the internal structure of the aluminum shell of this utility model;

[0018] Figure 3 This is a three-dimensional structural diagram of the detection component of this utility model;

[0019] Figure 4 This is a structural diagram of the V-shaped plate of this utility model;

[0020] Figure 5 This is a front view of the bracket and aluminum shell of this utility model.

[0021] In the diagram: 100, aluminum casing; 110, housing; 120, handle; 130, sealing plate; 140, V-shaped plate; 141, long straight groove; 150, bracket; 151, U-shaped main frame; 152, end block; 153, positioning plate; 154, upright plate; 155, lens adjustment bracket; 160, USB data interface;

[0022] 200. Detection component; 210. Lithium battery; 220. Light source angle adjustment lens; 230. Lens angle adjustment lens; 240. Focus adjustment mechanism; 250. Sharpness adjustment mechanism; 260. High-definition vision camera; 270. Lens; 280. Stable parallel light source. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0024] The embodiments of this utility model will be described below based on its overall structure.

[0025] A portable variable focal length optical projection inspection instrument, such as Figures 1 to 5 As shown, it includes an aluminum housing 100, which includes a shell 110. A sealing plate 130 is movably connected to the front and rear of the shell 110. A handle 120 is fixed to the top of the shell 110. A detection component 200 capable of measuring the surface of a shaft is assembled inside the aluminum housing 100.

[0026] The detection component 200 includes a lithium battery 210 installed at the bottom of the housing 110. Below the lithium battery 210 is a bracket 150 connected to the housing 110. The bracket 150 includes a U-shaped main frame 151. A stable parallel light source 280 capable of providing supplemental lighting for the shaft is mounted at one end of the U-shaped main frame 151. A lens 270 is mounted at the other end of the U-shaped main frame 151. A lens angle adjustment lens 230 is connected to the bottom of the lens 270. A high-definition vision camera 260 is mounted at the top of the lens angle adjustment lens 230. A light source angle adjustment lens 220 capable of reflecting light into the lens angle adjustment lens 230 is provided at the bottom of the stable parallel light source 280. A focus fine adjustment mechanism 240 is provided on the upper surface of the U-shaped main frame 151. A sharpness fine adjustment mechanism 250 capable of pulling the U-shaped main frame 151 up and down is mounted above the focus fine adjustment mechanism 240.

[0027] The bottom of the housing 110 is bolted to a V-shaped plate 140, and the inclined upper surface of the V-shaped plate 140 is provided with two sets of long straight grooves 141 for light to pass through.

[0028] The side wall of the housing 110 is equipped with a USB data interface 160, which can export the images captured by the high-definition vision camera 260 to an external device.

[0029] It is worth noting that, as per the instruction manual... Figure 1 and Figure 2 As shown, a portion of the circular part at the bottom is the shaft to be inspected, and its curved surface fits the bottom of the V-shaped plate 140. The long straight groove 141 opened in the V-shaped plate 140 allows the stable parallel light source 280 to illuminate the shaft, ensuring sufficient light on the shaft. The two sets of long straight grooves 141 are located on the inclined surface of the V-shaped plate 140, so the light source angle adjustment lens 220 can deliver light to the lens angle adjustment lens 230 on the horizontal side. The high-definition vision camera 260 is connected by a thread for easy disassembly.

[0030] The focus fine-tuning mechanism 240 and the sharpness fine-tuning mechanism 250 (dual precision lead screw fine-tuning mechanism with an accuracy of ≤5μm) work together with the linear guide rail to ensure smooth adjustment and stable accuracy.

[0031] The stable parallel light source 280 has a built-in light homogenizer, and the corner prism uses high-transmittance optical glass (transmittance ≥98%) to minimize optical path loss and distortion.

[0032] The aluminum outer shell has chamfered edges to prevent scratches; the internal modules are equipped with shock-absorbing pads to adapt to minor vibrations on site.

[0033] When photographing and analyzing the microscopic features (such as microscopic shape, roughness, scratches, defects, etc.) of the shaft surface, please refer to the instructions attached. Figure 1 As shown, the bottom is attached to the curved outer wall of the shaft, and a stable parallel light source 280 provides supplemental lighting to the outer wall of the shaft. The light source angle adjustment lens 220 transmits the image of the curved surface of the shaft to the lens angle adjustment lens 230, and is captured by the high-definition vision camera 260 through the lens 270. The device (which can be set by mobile phone or computer) can be connected to the USB data interface 160 via a data cable. The captured image can be exported in real time (and the lithium battery 210 can also be charged via the USB data interface 160). The shaft can be rotated (or the detection device can be rotated) to change the position of the image captured. During measurement, the focus can be adjusted according to the clarity of the image displayed by the external device. The clarity fine-tuning mechanism 250 and the focus fine-tuning mechanism 240 can be manually controlled to make the image of the shaft captured by the high-definition vision camera 260 clear, so as to improve work efficiency by measuring and judging immediately.

[0034] Please refer to this carefully. Figure 1 and Figure 2The two sets of sealing plates 130 are detachably connected to the front and rear of the housing 110 by screws. The surface of the front sealing plate 130 is provided with two sets of relief grooves for the surface knobs of the focus fine adjustment mechanism 240 and the sharpness fine adjustment mechanism 250.

[0035] The clearance groove allows for convenient manual rotation of the knob to control the focus fine-tuning mechanism 240 and the sharpness fine-tuning mechanism 250 during machine testing, thereby changing the focus and the sharpness of the captured image, which is beneficial for manual testing and judgment of the shaft components.

[0036] Manually, tools can be used to loosen the screws and inspect the detection component 200 inside the housing 110.

[0037] Please refer to this carefully. Figure 3 and Figure 5 The outer walls of both the light source angle adjustment lens 220 and the lens angle adjustment lens 230 are fixed with adjustment lens supports 155, and the top of the adjustment lens support 155 is connected to the bottom of the U-shaped main frame 151 by screws.

[0038] Both ends of the U-shaped main frame 151 are provided with end blocks 152 that can fix and stabilize the parallel light source 280 and the lens 270. The end blocks 152 are fixed to the end face of the U-shaped main frame 151 with bolts.

[0039] A vertical plate 154 is welded to the upper surface of the U-shaped main frame 151. A positioning piece 153 is fixedly connected to the inner wall of the housing 110 on one side of the vertical plate 154. A sharpness fine-tuning mechanism 250 is assembled between the vertical plate 154 and the positioning piece 153.

[0040] The bracket 150 can be used to fix the detection component 200 inside the aluminum housing 100, which also facilitates the disassembly and replacement of damaged parts, and allows for the adjustment of the horizontal height of the light source angle adjustment lens 220 and the lens angle adjustment lens 230, so that the image of the shaft component is clear and bright.

[0041] When using the device, the surface of the shaft should be photographed to inspect its microscopic condition (such as microscopic shape, roughness, scratches, defects, etc.). For measurement and analysis, please refer to the instructions provided. Figure 1As shown, the bottom is attached to the curved outer wall of the shaft, and a stable parallel light source 280 provides supplemental lighting to the outer wall of the shaft. The light source angle adjustment lens 220 transmits the image of the curved surface of the shaft to the lens angle adjustment lens 230, and is captured by the high-definition vision camera 260 through the lens 270. The device (which can be set by mobile phone or computer) can be connected to the USB data interface 160 via a data cable. The captured image can be exported in real time (and the lithium battery 210 can also be charged via the USB data interface 160). The shaft can be rotated (or the detection device can be rotated) to change the position of the image captured. During measurement, the focus can be adjusted according to the clarity of the image displayed by the external device. The clarity fine-tuning mechanism 250 and the focus fine-tuning mechanism 240 can be manually controlled to make the image of the shaft captured by the high-definition vision camera 260 clear, so as to improve work efficiency by measuring and judging immediately.

[0042] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A portable variable focal length optical projection inspection instrument comprising an aluminum housing (100), characterized in that: The aluminum housing (100) includes a housing (110), a sealing plate (130) is movably connected to the front and rear of the housing (110), a handle (120) is fixed to the top of the housing (110), and a detection component (200) capable of measuring the surface of the shaft is assembled inside the aluminum housing (100). The detection assembly (200) includes a lithium battery (210) installed at the bottom of the housing (110). Below the lithium battery (210) is a bracket (150) connected to the housing (110). The bracket (150) includes a U-shaped main frame (151). A stable parallel light source (280) capable of providing supplementary lighting for the shaft is mounted at one end of the U-shaped main frame (151). A lens (270) is mounted at the other end of the U-shaped main frame (151). A lens is connected to the bottom of the lens (270). The lens cornering lens (230) is equipped with a pair of high-definition vision cameras (260) on its top. The bottom of the stable parallel light source (280) is provided with a light source cornering lens (220) that can reflect light into the lens cornering lens (230). The upper surface of the U-shaped main frame (151) is provided with a focus fine adjustment mechanism (240). Above the focus fine adjustment mechanism (240) is a sharpness fine adjustment mechanism (250) that can pull the U-shaped main frame (151) up and down.

2. A portable variable focal length optical projection inspection instrument according to claim 1, characterized in that: The bottom of the housing (110) is bolted to a V-shaped plate (140), and the inclined upper surface of the V-shaped plate (140) is provided with two sets of long straight grooves (141) for light to pass through.

3. A portable variable focal length optical projection inspection instrument according to claim 1, characterized in that: The two sets of sealing plates (130) are detachably connected to the front and rear of the housing (110) by screws. The surface of the sealing plate (130) on the front side is provided with two sets of relief grooves for rotating the surface knobs of the focus fine adjustment mechanism (240) and the sharpness fine adjustment mechanism (250).

4. The portable variable focal length optical projection inspection instrument according to claim 1, wherein: The outer walls of the light source cornering lens (220) and the lens cornering lens (230) are both fixed with lens support (155), and the top of the lens support (155) is connected to the bottom of the U-shaped main frame (151) by screws.

5. The portable variable focal length optical projection inspection instrument according to claim 1, wherein: Both ends of the U-shaped main frame (151) are provided with end blocks (152) that can fix and stabilize the parallel light source (280) and the lens (270). The end blocks (152) are fixed to the end face of the U-shaped main frame (151) with bolts.

6. The portable variable focal length optical projection inspection instrument according to claim 1, wherein: The upper surface of the U-shaped main frame (151) is welded with a vertical plate (154), and one side of the vertical plate (154) is provided with a positioning piece (153) fixedly connected to the inner wall of the shell (110). The clarity fine-tuning mechanism (250) is assembled between the vertical plate (154) and the positioning piece (153).

7. The portable variable focal length optical projection inspection instrument according to claim 1, wherein: The side wall of the housing (110) is equipped with a USB data interface (160), which can export the images captured by the high-definition vision camera (260) to an external device.

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