Machine tool cutter wear detection system based on machine vision

Abstract

The invention relates to a machine tool cutter wear detection system based on machine vision, which is applied to the field of machine tool detection and comprises a follow-up reflection seat, a laser transmitter and a laser drop point feedback device. The cutter is positioned according to the total reflection principle of the rectangular prism, and the focal length and angle between the cutter and the visual inspection camera are effectively prevented from changing, so that image distortion can be effectively avoided when images of the same cutter are collected, and the accuracy of image analysis and comparison results is effectively improved; in addition, the offset is measured by detecting the drop point of the light, feedback is prevented from being formed for self-adaptive adjustment of the cutter, manual intervention is effectively avoided, in addition, whether the cutter vibrates or not in the detection process is judged by detecting light flicker, it is guaranteed that all collected images are effective, and therefore the detection efficiency is effectively improved.

Description

Technical Field

[0001] The present invention relates to a machine tool tool wear detection system based on machine vision, and in particular to a machine tool tool wear detection system based on machine vision applied in the field of machine tool detection. Background Art

[0002] Machine vision inspection technology can achieve micron-level inspection accuracy through high-resolution cameras and advanced image processing algorithms, and can detect tiny defects that are difficult to detect with traditional inspection methods, such as scratches and cracks. Currently, machine vision inspection has begun to be widely used in machine tool inspection.

[0003] Machine vision inspection of tools can be divided into internal and external inspections. However, since external inspections of machine tools require disassembly and assembly, the inspection efficiency is low. Therefore, most inspections on the market currently use internal inspections of machine tools. For example, a method for online tool wear detection based on machine vision with publication number CN119238210A discloses a method for online tool detection. However, online tool detection is also affected by many factors, such as vibration, ambient light, dust, temperature and humidity, electromagnetic interference, and focal length. The focal length has a relatively high impact on the accuracy of image analysis. For example, a machine vision-based tool fully automatic focusing on-machine inspection system and method with publication number CN112045497B discloses a mechanism for adjusting the focal length.

[0004] However, simply adjusting the focal length cannot guarantee that the tool will have the same posture with respect to the same camera. This is mainly because the adjustment mechanism will wear out during long-term operation, resulting in the tool and the camera having their focal lengths adjusted into place, but the tool's posture being inconsistent. For example, the tool does not remain vertical or horizontal, or the tool has an angle deviation relative to the same camera, causing the image captured by the camera to be distorted relative to the comparison image, thereby affecting the analysis of tiny gaps and wear. Summary of the invention

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that the operational wear of the adjustment mechanism causes the tool to deviate from the shooting posture of the same camera, causing image distortion, thereby affecting the results of image comparison and analysis.

[0006] To solve the above problems, the present invention provides a machine tool tool wear detection system based on machine vision, which includes a multi-axis robotic arm installed inside a machine tool detection box, a tool to be detected clamped at the clamping end of the multi-axis robotic arm, a tool self-detection and positioning module, and a vision detection module. The vision detection module includes a plurality of vision detection cameras arranged in a surrounding array around the tool and a vision detection camera located directly below the tool, and the cameras of the plurality of vision detection cameras are all directed towards the tool. The tool self-detection and positioning module includes a follow-up reflector fixedly connected to the side wall of the multi-axis robotic arm, a laser emitter fixedly installed on the top of the detection box and directly above the follow-up reflector, and a fixed receiver fixedly installed on the side wall of the detection box and facing the follow-up reflector directly. An L-shaped through hole is formed in the inner wall of the follow-up reflector, and the center lines of the upper and lower ends of the L-shaped through hole are respectively aligned with the central axes of the laser emitter and the fixed receiver. A right-angle prism is fixedly connected at the right-angle turning of the L-shaped through hole, a laser receiver is installed on the fixed receiver, and the central axis of the laser receiver coincides with the center line of the L-shaped through hole. A multi-plane structure photoelectric sensor is fixedly embedded at the upper end of the L-shaped through hole, and a polarizer for allowing light to pass vertically is fixedly embedded at the position of the multi-plane structure photoelectric sensor facing the L-shaped through hole.

[0007] In the above machine tool tool wear detection system based on machine vision, the total reflection principle of the right-angle prism is used to position and correct the posture of the robotic arm clamping the tool, effectively ensuring that the image acquisition of the same part of the tool by the same camera does not produce distortion, thereby effectively improving the accuracy of the image comparison and analysis results.

[0008] As a further improvement of the present application, the tool self-detection and positioning module further includes a control center, a horizontal adjustment unit and a vertical adjustment unit that are signal-connected to the multi-axis robotic arm through the control center. The multi-plane structure photoelectric sensor is signal-connected to the horizontal adjustment unit and the vertical adjustment unit through the control center.

[0009] As a further improvement of the present application, the multi-plane structure photoelectric sensor is divided into a plurality of equal parts regions, and position coordinates including the offset direction and incident angle relative to the center point of the multi-plane structure photoelectric sensor are embedded in each region through the control center.

[0010] As a further improvement of the present application, a laser spot feedback device is fixedly embedded outside the laser receiver on the fixed receiver. The laser spot feedback device includes a photosensitive resistor sheet, and a through hole is formed in the middle position of the photosensitive resistor sheet. Temperature measurement optical fibers perpendicular to the center of the through hole are fixedly connected to the upper, lower, left and right parts of the photosensitive resistor sheet, and the photosensitive resistor sheet is signal-connected to the horizontal adjustment unit and the vertical adjustment unit through the control center.

[0011] As a further improvement and supplement of the present application, the four temperature-measuring optical fibers are grouped in pairs and perpendicular to each other, and all four temperature-measuring optical fibers are embedded in a two-dimensional coordinate through a control center.

[0012] As another improvement of the present application, the laser landing point feedback device further includes a light-transmitting plate parallel to the photosensitive resistor sheet, and an opening matching the perforation is provided in the middle of the light-transmitting plate. A plurality of concentric color guiding light rings are fixedly inlaid on the light-transmitting plate, and the plurality of color guiding light rings are disconnected on the path of the temperature-measuring optical fiber and leave a gap of more than 1-2 mm. A photosensitive sensor is also fixedly connected to the side wall of the follower reflection seat facing the color guiding light ring, and the photosensitive sensor is signal-connected to an alarm device installed on the machine tool through a control center.

[0013] As a supplement to another improvement of the present application, a first photosensitive resistor ring concentric with the polarizing plate is further fixedly connected to the outer periphery of the multi-plane structure photoelectric sensor, and the first photosensitive resistor ring is signal-connected to the alarm device through a control center.

[0014] As a supplement to another improvement of the present application, a second photosensitive resistor ring is further fixedly connected to the outer periphery of the photosensitive resistor sheet, and the second photosensitive resistor ring is signal-connected to the alarm device through a control center.

[0015] As another improvement of the present application, the polarizing plate and the perforation have the same diameter, and the diameter of both is 2-5 mm larger than the diameter of the laser light path emitted by the laser emitter.

[0016] In summary, by setting a right-angled prism on the multi-axis robotic arm for clamping the tool, the tool is indirectly positioned and monitored. The tool is positioned using the total reflection principle of the right-angled prism, effectively preventing changes in the focal length and angle between the tool and the vision detection camera. In this way, image distortion can be effectively avoided when collecting images of the same tool, thereby effectively improving the accuracy of the image analysis and comparison results. The offset is also measured by detecting the landing point of the light, so as to form a feedback for the adaptive adjustment of the tool, effectively avoiding manual intervention. In addition, the vibration of the tool during detection is judged by detecting the light flicker, so as to ensure that all the collected images are valid, thereby effectively improving the detection efficiency. Description of the Drawings

[0017] Figure 1 Is a three-dimensional view of the detection device according to the first embodiment of the present application; Figure 2 Is a detection state diagram of the tool when the focal length changes according to the first embodiment of the present application; Figure 3 Is a detection state diagram of the tool when tilted according to the first embodiment of the present application; Figure 4 Is a front view sectional view of the tool in the normal detection state according to the first embodiment of the present application; Figure 5 Top view of the PSD position sensor according to the second embodiment of the present application; Figure 6 Front and back comparison diagrams of the tool adjustment during offset according to the second embodiment of the present application; Figure 7 Front view of the laser spot feedback device according to the second embodiment of the present application; Figure 8 Side sectional view of the laser spot feedback device according to the third embodiment of the present application; Figure 9 Front view of the light-transmitting plate according to the third embodiment of the present application; Figure 10 Comparison diagram of normal image and distorted image collected by the vision detection camera according to the second embodiment of the present application.

[0018] Explanation of the reference numerals in the figure: 1 multi-axis robotic arm, 2 tool, 3 vision detection camera, 4 follower reflection seat, 401 L-shaped through hole, 402 right-angle prism, 5 laser emitter, 6 fixed receiving seat, 601 laser receiver, 7 multi-plane structure photoelectric sensor, 701 polarizer, 702 first photosensitive resistor ring, 8 laser spot feedback device, 801 photosensitive resistor sheet, 802 perforation, 803 temperature measurement optical fiber, 804 light-transmitting plate, 805 color light guide ring, 806 second photosensitive resistor ring, 9 photosensitive sensor. Specific embodiments

[0019] The following will describe in detail the three embodiments of the present application with reference to the accompanying drawings.

[0020] The first embodiment: It includes a multi-axis robotic arm 1 (prior art) installed inside the machine tool detection box, a tool 2 to be detected clamped at the clamping end of the multi-axis robotic arm 1, a tool self-detection and positioning module, and a vision detection module. The multi-axis robotic arm 1 is prior art and is used to take out the tool 2 from the tool storage box for detection and then put it back. Here, it should be noted that the multi-axis robotic arm 1 clamps the tool 2, and their centerlines are on the same straight line, so that the postures of the multi-axis robotic arm 1 and the tool 2 are synchronized. By positioning the multi-axis robotic arm 1, the positioning of the tool 2 can be achieved, such as Figure 1As shown in the figure, the visual detection module includes multiple visual detection cameras 3 arranged in a surrounding array around the tool 2 and a visual detection camera 3 located directly below the tool 2. The cameras of multiple visual detection cameras 3 are all oriented towards the tool 2. The multiple surrounding visual detection cameras 3 are used to perform 360° detection on the side of the tool 2, and one visual detection camera 3 at the bottom is used to detect the tool tip of the tool 2. The tool self-detection and positioning module includes a follow-up reflection seat 4 fixedly connected to the side wall of the multi-axis robotic arm 1, a laser emitter 5 fixedly installed on the top of the detection box and directly above the follow-up reflection seat 4. The laser emitted by the laser emitter 5 is perpendicular to the ground, and a fixed receiving seat 6 fixedly installed on the side wall of the detection box and facing the follow-up reflection seat 4. As Figure 4 shown, an L-shaped through hole 401 is formed in the inner wall of the follow-up reflection seat 4, and the center lines of the upper and lower ends of the L-shaped through hole 401 are respectively aligned with the central axes of the laser emitter 5 and the fixed receiving seat 6. A right-angle prism 402 is fixedly connected to the right-angle turning of the L-shaped through hole 401. A laser receiver 601 is installed on the fixed receiving seat 6, and the central axis of the laser receiver 601 coincides with the center line of the L-shaped through hole 401. As Figure 5 shown, a multi-plane structure photoelectric sensor 7 is fixedly embedded at the upper end of the L-shaped through hole 401, and a polarizer 701 that allows light to pass through vertically is fixedly embedded at the position of the multi-plane structure photoelectric sensor 7 facing the L-shaped through hole 401. The polarizer 701 can allow light at a specific angle to pass through depending on the setting of the internal grating bars. In this application, in order to allow the vertical light emitted by the laser emitter 5 to pass through the polarizer 701 and irradiate the right-angle prism 402, the internal grating of the polarizer 701 is set to a vertical state. In this way, as long as the multi-axis robotic arm 1 tilts, the laser emitted by the laser emitter 5 cannot irradiate the right-angle prism 402, thereby playing a role in positioning and attitude correction of the tool 2; In this embodiment, the total reflection of the right-angle prism 402 and the characteristic that the polarizer 701 only allows vertical light to pass through are used to position the tool 2. The positioning principle is as follows: Since the laser emitted by the laser emitter 5 is vertical and there is only one laser landing point, as long as the tool 2 has a relative position shift in the horizontal direction with respect to the bottom vision detection camera 3 and tilts in the vertical direction, the laser emitted by the laser emitter 5 cannot irradiate the right-angle prism 402. Consequently, the laser receiver 601 cannot receive the laser. Only when the tool 2 is in a horizontal state and the laser is vertically irradiated onto the polarizer 701 can the right-angle prism 402 reflect the laser. The above only completes the first step of positioning. Then, the second step is carried out. After the right-angle prism 402 reflects the laser, for the laser receiver 601 to receive the laser, the tool 2 cannot deflect and displace in the horizontal direction and cannot change the distance relative to the bottom vision detection camera 3 in the vertical direction based on the first step. These two factors jointly determine the focal lengths of the tool 2 with multiple side vision detection cameras 3 and one bottom vision detection camera 3. Meeting all the above conditions realizes the positioning of the tool 2. In this way, when the tool 2 captures images before and after, the position of the same vision detection camera 3 with respect to the same part of the tool 2 remains unchanged, so that the captured images do not become distorted, thereby effectively improving the accuracy of the image analysis and comparison results.

[0021] The second embodiment: Based on the positioning of the first embodiment, this embodiment detects the laser landing point and makes adaptive adjustments according to this feedback. On the premise that the rest is the same as the first embodiment, the newly added content is as follows: As Figure 6 shown, the tool self-detection and positioning module further includes a control center, a horizontal adjustment unit and a vertical adjustment unit that are signal-connected to the multi-axis robotic arm 1 through the control center. The multi-plane structure photoelectric sensor 7 is signal-connected to the horizontal adjustment unit and the vertical adjustment unit through the control center. The multi-plane structure photoelectric sensor 7 is divided into multiple equal parts, and each area is embedded with position coordinates including the offset direction and incident angle relative to the center point of the multi-plane structure photoelectric sensor 7 through the control center. The multi-plane structure photoelectric sensor 7 can detect the landing position and incident angle of the laser on it. When the laser irradiates the multi-plane structure photoelectric sensor 7, the multi-plane structure photoelectric sensor 7 generates an electrical signal at the laser landing position, and this electrical signal is sent to the control center. The control center then adjusts the attitude of the tool 2 through the horizontal adjustment unit and the vertical adjustment unit. The specific adjustment method is as Figure 3As shown, whether the tool 2 is displaced horizontally or tilted vertically, the laser will fall on a certain point on the multi-plane structure photoelectric sensor 7. The electrical signal at the landing point contains two pieces of information. One is the landing position of the laser, and the other is the incident angle of the laser. The control center adjusts the attitude of the tool 2 through the horizontal adjustment unit and the vertical adjustment unit according to the information contained in the electrical signal until the laser is vertically irradiated onto the right-angled prism 402 and reflected onto the laser receiver 601; It should be noted that the multi-plane structure photoelectric sensor 7 is a prior art. Its principle is to calculate the incident angle by designing special geometric structures such as trapezoidal grooves and inclined plane arrays on the sensor surface and using the plane projection differences at different angles. At the same time, the landing point is determined by the position distribution of the photoelectric conversion unit. Other specific working principles and specific structures will not be described in detail here; As Figure 4 、 7 As shown in Figures 8, a laser landing point feedback device 8 is fixedly embedded outside the laser receiver 601 of the fixed receiving seat 6. The laser landing point feedback device 8 includes a photosensitive resistor sheet 801, and a through hole 802 is opened in the middle position of the photosensitive resistor sheet 801. The diameter of the polarizing sheet 701 is the same as that of the through hole 802, and both diameters are 2-5 mm larger than the diameter of the laser light path emitted by the laser emitter 5. Temperature measurement optical fibers 803 perpendicular to the center of the through hole 802 are fixedly connected to the upper, lower, left, and right parts of the photosensitive resistor sheet 801. The photosensitive resistor sheet 801 is signal-connected to the horizontal adjustment unit and the vertical adjustment unit through the control center. The multi-plane structure photoelectric sensor 7 is the first step to adjust the attitude of the tool 2. On the basis of the first step, if the tool 2 deflects horizontally and moves up and down vertically, the laser reflected by the right-angled prism 402 will irradiate onto the photosensitive resistor sheet 801. If the laser just falls on the vertical temperature measurement optical fiber 803, as Figure 2 shown, the temperature measurement optical fiber 803 adjusts the up and down position of the tool 2 through the electrical signal generated by the laser landing point. If it just falls on the horizontal temperature measurement optical fiber 803, the temperature measurement optical fiber 803 adjusts the horizontal rotation of the tool 2 according to the electrical signal. If the laser falls on an area other than the temperature measurement optical fiber 803, the photosensitive resistor sheet 801 makes the tool 2 rotate back and forth horizontally through the control center to find the vertical temperature measurement optical fiber 803, then makes a horizontal rotation adjustment based on this temperature measurement optical fiber 803, and then makes the tool 2 move up and down vertically so that the laser is irradiated onto the through hole 802 and received by the laser receiver 601. In this way, the focal length of the tool 2 for each vision detection camera 3 remains unchanged, thus completing the adjustment of the attitude of the tool 2; In addition, it should be supplemented and explained that the temperature-measuring optical fiber 803 is a prior art. Its principle is based on the optical characteristics of the optical fiber, and the temperature monitoring is realized by measuring the change of the optical signal with temperature. In this embodiment, the laser beam itself has heat, so the heat carried by the laser itself is used to trigger the temperature-measuring optical fiber 803, so as to achieve the purpose of letting the temperature-measuring optical fiber 803 detect the laser; The four temperature-measuring optical fibers 803 are grouped in pairs and perpendicular to each other, and the four temperature-measuring optical fibers 803 are all embedded in a two-dimensional coordinate through the control center. The horizontal temperature-measuring optical fibers 803 are in a group and are used to feedback and adjust the deflection of the tool 2 in the horizontal direction. The vertical temperature-measuring optical fibers 803 are in a group and are used to adjust the tool 2 in the vertical direction; As Figure 10 shown, in this embodiment, the attitude of the tool 2 is feedback by detecting the laser landing point, and the attitude of the tool 2 is adjusted with this as the adjustment parameter. In this way, when the same vision detection camera 3 collects images of the same part of the tool 2, image distortion can be effectively avoided, thereby effectively improving the accuracy of the image analysis and comparison results.

[0022] The third embodiment: On the basis of the above first embodiment, this embodiment further improves the laser landing point feedback device 8, so that the laser landing point feedback device 8 can play the role of vibration monitoring and warning. The rest of this embodiment is the same as the first embodiment; As Figure 8 、 9 shown, the laser landing point feedback device 8 further includes a light-transmitting plate 804 parallel to the photosensitive resistor sheet 801, and a through hole matching the through hole 802 is opened in the middle of the light-transmitting plate 804. A plurality of concentric color guide light rings 805 are fixedly inlaid on the light-transmitting plate 804, and the plurality of color guide light rings 805 are disconnected on the path of the temperature-measuring optical fiber 803 and a gap of more than 1-2 mm is left. A photosensitive sensor 9 is also fixedly connected to the side wall of the follower reflector seat 4 facing the color guide light ring 805, and the photosensitive sensor 9 is signal-connected to an alarm device installed on the machine tool through the control center. The light will pass through the gap between the color guide light rings 805 before irradiating the temperature-measuring optical fiber 803, so as not to hinder the laser light path. When the tool 2 vibrates, the light will irradiate on the color guide light ring 805, and then make the color guide light ring 805 glow. During the vibration, the laser will pass back and forth through the color guide light ring 805, thus producing a flashing effect of the light. Then, after the photosensitive sensor 9 detects the light flashing, it sends an alarm to the alarm device to notify the staff that the tool 2 vibrates during visual detection, so as to timely adjust the entire machine tool and the detection system; The outer periphery of the multi-plane structure optoelectronic sensor 7 is also fixedly connected with a first photosensitive resistor ring 702 concentric with the polarizing plate 701, and the first photosensitive resistor ring 702 is signal-connected to the alarm device through the control center. If the offset amplitude of the tool 2 during the first-step positioning is too large, the ray emitted by the laser emitter 5 will irradiate the first photosensitive resistor ring 702, and the first photosensitive resistor ring 702 will then trigger the alarm device, indicating that there is a problem with the structure of the multi-axis robotic arm 1, so that the staff can timely adjust and correct the multi-axis robotic arm 1; The outer periphery of the photosensitive resistor chip 801 is also fixedly connected with a second photosensitive resistor ring 806, and the second photosensitive resistor ring 806 is signal-connected to the alarm device through the control center. When the offset amplitude of the tool 2 during the second-step positioning is too large, the light will irradiate on 807, and 807 will then trigger the alarm device. Similarly, this also indicates that there is a problem with the structure of the multi-axis robotic arm 1, so that the staff can timely adjust and correct the multi-axis robotic arm 1; By detecting the light flicker to judge whether the tool 2 vibrates during the detection, so as to ensure that all the collected images are valid, thereby effectively improving the detection efficiency.

[0023] Combined with the current actual requirements, the above implementation manner adopted in this application, the protection scope is not limited to this. Within the knowledge scope of those skilled in the art, various changes made without departing from the concept of this application still fall within the protection scope of the present invention.

Claims

1. A machine tool tool wear detection system based on machine vision, characterized in that: The invention comprises a multi-axis mechanical arm (1) installed inside a machine tool detection box, a tool (2) to be detected clamped at a clamping end of the multi-axis mechanical arm (1), a tool self-detection positioning module, and a visual detection module, wherein the visual detection module comprises a plurality of visual detection cameras (3) arranged in an array around the periphery of the tool (2) and a visual detection camera (3) located directly below the tool (2), and the cameras of the plurality of visual detection cameras (3) are all facing the tool (2), and the tool self-detection positioning module comprises a follow-up reflection seat (4) fixedly connected to a side wall of the multi-axis mechanical arm (1), a laser transmitter (5) fixedly installed on the top of the detection box and located directly above the follow-up reflection seat (4), and a fixed connection (6) fixedly installed on the side wall of the detection box and facing the follow-up reflection seat (4). The receiving seat (6) is provided with an L-shaped through hole (401) on the inner wall of the follow-up reflector seat (4), and the center lines of the upper and lower ends of the L-shaped through hole (401) are respectively aligned with the center axes of the laser emitter (5) and the fixed receiving seat (6), a right-angle prism (402) is fixedly connected to the right-angle turn of the L-shaped through hole (401), a laser receiver (601) is installed on the fixed receiving seat (6), and the center axis of the laser receiver (601) coincides with the center line of the L-shaped through hole (401), a multi-plane structure photoelectric sensor (7) is fixedly embedded at the upper end of the L-shaped through hole (401), and a polarizing plate (701) for allowing light to pass vertically is fixedly embedded at a position of the multi-plane structure photoelectric sensor (7) directly opposite to the L-shaped through hole (401).

2. The machine tool tool wear detection system based on machine vision according to claim 1, characterized in that: The tool self-detection positioning module also includes a control center, and a horizontal adjustment unit and a vertical adjustment unit connected to the multi-axis mechanical arm (1) by signals through the control center, and the multi-plane structure photoelectric sensor (7) is connected to the horizontal adjustment unit and the vertical adjustment unit by signals through the control center.

3. The machine tool tool wear detection system based on machine vision according to claim 2, characterized in that: The multi-plane structure photoelectric sensor (7) is divided into a plurality of equal areas, and each area is embedded with position coordinates including a direction of deviation and an incident angle relative to the center point of the multi-plane structure photoelectric sensor (7) through a control center.

4. The machine tool tool wear detection system based on machine vision according to claim 2, characterized in that: The fixed receiving seat (6) is located outside the laser receiver (601) and is fixedly embedded with a laser landing point feedback device (8), the laser landing point feedback device (8) comprises a photoresistor sheet (801), and a through hole (802) is provided in the middle of the photoresistor sheet (801), the upper, lower, left and right parts of the photoresistor sheet (801) are fixedly connected with temperature measuring optical fibers (803) perpendicular to the center of the through hole (802), and the photoresistor sheet (801) is connected to the horizontal adjustment unit and the vertical adjustment unit through the control center.

5. The machine tool tool wear detection system based on machine vision according to claim 4, characterized in that: The four temperature measuring optical fibers (803) are arranged in groups of two and are perpendicular to each other, and the four temperature measuring optical fibers (803) are all embedded in a two-dimensional coordinate through a control center.

6. The machine tool tool wear detection system based on machine vision according to claim 4, characterized in that: The laser landing point feedback device (8) further comprises a light-transmitting plate (804) parallel to the photoresistor sheet (801), and an opening matching the perforation (802) is provided in the middle of the light-transmitting plate (804), a plurality of concentric colored light-guiding rings (805) are fixedly inlaid on the light-transmitting plate (804), and the plurality of colored light-guiding rings (805) are disconnected on the path of the temperature measuring optical fiber (803) and leave a gap greater than 1-2 mm, and a photosensitive sensor (9) is also fixedly connected to the side wall of the follow-up reflector seat (4) facing the colored light-guiding ring (805), and the photosensitive sensor (9) is connected to an alarm device installed on the machine tool through a control center signal.

7. The machine tool tool wear detection system based on machine vision according to claim 6, characterized in that: A photoresistor ring 1 (702) concentric with the polarizing plate (701) is also fixedly connected to the periphery of the multi-plane structure photoelectric sensor (7), and the photoresistor ring 1 (702) is connected to an alarm device signal via a control center.

8. The machine tool tool wear detection system based on machine vision according to claim 6, characterized in that: A second photoresistor ring (806) is also fixedly connected to the outer periphery of the photoresistor sheet (801), and the second photoresistor ring (806) is connected to an alarm device signal via a control center.

9. The machine tool tool wear detection system based on machine vision according to claim 4, characterized in that: The polarizing plate (701) and the perforation (802) have the same diameter, and the diameters of the two are 2-5 mm larger than the diameter of the laser light path emitted by the laser emitter (5).

Images