A 360 degree annular profile detection device and method

Abstract

The present application relates to the technical field of profile detection equipment, in particular to a 360-degree annular profile detection device and method, which comprises a detection console, an annular detection frame fixed at the top end of the detection console, and an annular hole opened in the middle of the annular detection frame. Through the meshing transmission of the limiting gear and the limiting rack of the stepping control motor, the two positioning blocks are driven to synchronously close and clamp the flexible wire harness workpiece. The real-time feedback of the clamping pressure is realized by cooperating with the pressure intelligent sensor embedded in the flexible rubber block, the closed-loop control of the clamping force is realized, and then the placement frame is driven to move outward along the auxiliary rod stably through the electric telescopic rod, so that the positioning block clamping wire harness moves from the detection section to both ends along the axial direction, the wire harness is straightened and orthopedic, and the axial tension is realized. The interference of the workpiece self-weight sag and the detection process jitter on the data collection of the laser intelligent sensor is effectively reduced, a stable measurement attitude reference is provided for the laser intelligent sensor, and the accuracy and data repeatability of the geometric quantity profile detection result are improved.

Description

Technical Field

[0001] This invention relates to the field of contour detection equipment technology, specifically a 360-degree annular contour detection device and method. Background Technology

[0002] In the field of geometric precision inspection technology, the 360-degree annular contour inspection device is a commonly used equipment for inspecting the cross-sectional contours and dimensions of profiles and cables. It mainly consists of a control console, an annular inspection frame, and multiple sets of laser intelligent sensors. The annular inspection frame has a through-hole in the center, and the laser intelligent sensors are evenly arranged circumferentially along the inner wall of the annular hole. The control console handles data processing and equipment operation control. Support structures are typically installed on both sides of the annular hole to support the workpiece being measured, ensuring the inspected section is suspended and preventing obstruction of the measurement optical path. This type of device relies on multiple sensors to simultaneously collect local contour data and stitch it together to form full-circumference cross-sectional data, enabling non-contact, rapid dimensional inspection. It has mature applications in the inspection of rigid metal profiles and ceramic workpieces.

[0003] However, the existing 360-degree ring contour detection device has obvious shortcomings in the detection of flexible wire harness workpieces. The existing placement rack only has a simple support function and lacks a clamping, straightening and constant force tensioning structure adapted to flexible workpieces. After the flexible wire harness is placed, it is easy to sag and loosen due to its own weight. During the detection process, radial jitter and axial movement are likely to occur, resulting in fluctuations in the contour acquisition data and making it impossible to stably obtain the true size parameters of the workpiece in its natural state. Summary of the Invention

[0004] The purpose of this invention is to provide a 360-degree annular contour detection device and method to solve the problems mentioned in the background art. The placement frame of the existing annular contour detection device only has basic support function and lacks a clamping, straightening and constant force tensioning structure adapted to flexible workpieces. The wire harness is prone to sag and loosen due to its own weight, and radial jitter and axial movement are prone to occur during the detection process, resulting in fluctuations in contour acquisition data and difficulty in stably obtaining the true size parameters of the workpiece in its natural state.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a 360-degree annular contour detection device, comprising a detection console, an annular detection frame fixed to the top of the detection console, and an annular hole in the middle of the annular detection frame. A plurality of laser intelligent sensors are fixedly arranged around the inner wall of the annular hole. Two placement frames are symmetrically arranged along the axis of the annular hole. A support frame is vertically arranged on one side of the bottom of each placement frame. A clamping, tensioning, and straightening assembly is arranged on the outside of each placement frame. A wiping and shielding assembly is arranged on the outer side of the end of one placement frame away from the support frame. The clamping, tensioning, and straightening assembly includes a through groove, a stepper motor, and an electric telescopic rod. The through groove extends through the interior of the end of the placement frame away from the support frame. The stepper motor is located on the outer side of the bottom end of the placement frame near the through groove. The electric telescopic rod is fixedly installed on the outer side of the support frame near the placement frame.

[0006] Furthermore, a display screen is installed on one side of the external side of the testing console, and control buttons are installed on the external side of the testing console near the display screen. A fixing seat is fixedly installed at the bottom of the support frame, and the fixing seat is fixedly installed on the top external side of the testing console.

[0007] Furthermore, a mounting bracket is fixed to the outside of the placement frame near the stepper motor, and a mounting base is fixed to the end of the mounting bracket away from the placement frame. The stepper motor is fixed to the outside of the mounting base, and a limit gear is fixed to the output end of the stepper motor. Two limit racks are symmetrically and alternately meshed on both sides of the limit gear.

[0008] Furthermore, a limiting slide block is slidably engaged on one side of each limiting rack, one end of the limiting slide block is fixedly installed on the bottom outside of the placement frame, and a limiting groove is opened through the inside of the side of the placement frame near each limiting rack, and a limiting rod is fixedly installed inside the limiting groove.

[0009] Furthermore, a limiting slider is slidably mounted on the outside of the limiting rod, one end of the limiting slider is fixedly mounted on one end of a limiting rack on the corresponding side, a limiting block is fixedly mounted on the end of the limiting rod away from the stepper control motor, and a positioning block is fixedly mounted on the end of the limiting slider located inside the through groove.

[0010] Furthermore, an arc-shaped groove is provided on the side of the positioning block near the middle of the placement frame, and a flexible adhesive block is bonded and fixed on the inner wall of the arc-shaped groove. A pressure smart sensor is embedded and fixed in the middle of the flexible adhesive block.

[0011] Furthermore, a connecting block is fixedly installed at the output end of the electric telescopic rod. One end of the connecting block is fixedly installed at the bottom end of the placement frame near the stepper motor. Two auxiliary rods are symmetrically and slidably installed through both sides of the top of the support frame. Each auxiliary rod has an auxiliary block fixedly installed at both ends. One end of the auxiliary block is fixedly installed at the bottom end of the placement frame.

[0012] Furthermore, the wiping and masking assembly includes an auxiliary ring and a connecting frame. The auxiliary ring is disposed in an annular hole. One end of the connecting frame is fixedly installed on the inner wall of the auxiliary ring, and a positioning seat is fixedly installed on the other end of the connecting frame. One side of the positioning seat is threadedly connected to one end of the placement frame by a positioning bolt.

[0013] Furthermore, a stop block is fixed on one side of the auxiliary ring near each laser smart sensor. A stop groove is opened through the inside of the stop block, and a sponge block is fixed on the inner wall of the stop groove. One side of the sponge block is attached to a laser smart sensor on the corresponding side.

[0014] The present invention also provides a method for detecting a 360-degree circular contour, comprising the following steps: S1: Place the flexible wire harness to be tested on top of the two placement racks, so that the wire harness spans the annular hole area, and complete the initial placement; S2: Start the stepper motor, which drives the positioning blocks on both sides to close and clamp the middle of the wire harness through the limit gear and limit rack. After the pressure intelligent sensor feedback meets the standard, the stepper motor locks. S3: The electric telescopic rods on both sides retract, causing the placement rack to move outward. The positioning block straightens and tightens the straight beam from the middle to both sides. The placement rack moves the auxiliary ring in sync. The sponge block wipes the laser smart sensor. S4: After the electric telescopic pole retracts and locks, all laser intelligent sensors are activated to perform a 360-degree circular contour detection on the suspended and taut wire harness and collect cross-sectional contour dimension data. S5: After the inspection is completed, the stepper motor reverses to loosen the wiring harness, removes the workpiece, the electric telescopic rod extends and resets, the auxiliary ring returns to its original position synchronously, and the stop block blocks the laser intelligent sensor to complete the protection.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. A stepper motor, through the meshing of a limit gear and a limit rack, drives the positioning blocks on both sides to synchronously close and clamp the flexible wire harness workpiece. Combined with a pressure intelligent sensor embedded in the flexible rubber block, the clamping pressure is fed back in real time, achieving closed-loop control of the clamping force. This system can adapt to flexible workpieces of different wire diameters and materials. While ensuring clamping stability during tensioning, it avoids excessive compression that could cause workpiece cross-sectional deformation, making the workpiece in the detection section closer to its natural, stress-free geometry. Then, an electric telescopic rod drives the placement frame to move smoothly outward along the auxiliary rod, causing the positioning blocks to clamp the wire harness axially from the detection section towards both ends. This straightens and corrects the wire harness and achieves axial tension, effectively reducing the interference of workpiece sagging and vibration during the detection process on the data acquisition of the laser intelligent sensor. This provides a stable measurement posture reference for the laser intelligent sensor, improving the accuracy and repeatability of the geometric contour detection results.

[0016] 2. The auxiliary ring is connected to the placement frame via the connecting frame and the positioning seat. The axial movement of the placement frame drives the auxiliary ring to move synchronously, so that the sponge block in the inner groove of the stop block automatically slides across the detection end face of the laser intelligent sensor during the detection cycle, removing the floating dust and fine particles attached to the surface, reducing laser scattering and contour blurring caused by contaminants, and ensuring the clarity and accuracy of the data collected by the laser intelligent sensor. In the standby state, the stop block covers the outside of the laser intelligent sensor, blocking dust flocculents and oil mist in the production environment, reducing the contamination rate of optical components, reducing the frequency of manual cleaning and maintenance, and maintaining the long-term accuracy and stability of the geometric measurement device. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a three-dimensional structural diagram of the support frame and the electric telescopic rod of the present invention; Figure 3 This is a top sectional view of the annular detection frame and placement frame of the present invention; Figure 4 This is a three-dimensional structural diagram of the placement rack and support frame of the present invention; Figure 5 This is a bottom-view perspective view of the placement frame and support frame of the present invention. Figure 6 For the present invention Figure 5 Enlarged structural diagram at point A in the middle; Figure 7 This is a partial cross-sectional perspective view of the three-dimensional structure of the placement frame and the limiting slide groove of the present invention; Figure 8 This is a three-dimensional structural diagram of the placement rack and connecting rack of the present invention; Figure 9 For the present invention Figure 8 Enlarged structural diagram at point B; Figure 10 For the present invention Figure 8 Enlarged structural diagram at point C; Figure 11 This is a front view schematic diagram of the laser intelligent sensor and the stop block of the present invention.

[0018] The attached diagram lists the components represented by each number as follows: 1. Testing console; 2. Annular testing frame; 3. Laser intelligent sensor; 4. Display screen; 5. Placement rack; 6. Support frame; 7. Electric telescopic rod; 8. Through slot; 9. Stepper control motor; 10. Limit gear; 11. Limit rack; 12. Limit slide groove; 13. Limit rod; 14. Limit slider; 15. Positioning block; 16. Flexible rubber block; 17. Pressure intelligent sensor; 18. Connecting block; 19. Auxiliary rod; 20. Auxiliary block; 21. Mounting frame; 22. Limit slide seat; 23. Annular hole; 24. Auxiliary ring; 25. Connecting frame; 26. Stop block; 27. Stop groove; 28. Sponge block; 29. ​​Limit block; 30. Arc groove; 31. Mounting seat; 32. Positioning seat; 33. Positioning bolt; 34. Control button; 35. Fixing seat. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1: Please refer to Figures 1-7 A 360-degree annular contour detection device includes a detection console 1, an annular detection frame 2 fixed to the top of the detection console 1, and an annular hole 23 opened in the middle of the annular detection frame 2. Several laser intelligent sensors 3 are fixed around the inner wall of the annular hole 23. Two placement frames 5 are symmetrically arranged along the axis of the annular hole 23. A support frame 6 is vertically arranged on one side of the bottom end of each placement frame 5. A clamping tensioning and straightening assembly is arranged on the outside of each placement frame 5. The clamping tensioning and straightening assembly includes a through groove 8, a stepper control motor 9, and an electric telescopic rod 7. The through groove 8 is opened through the inside of the end of the placement frame 5 away from the support frame 6. The stepper control motor 9 is arranged on the outside of the bottom end of the placement frame 5 near the through groove 8. The electric telescopic rod 7 is fixedly installed on the outside of the support frame 6 on the side near the placement frame 5.

[0021] A display screen 4 is installed on one side of the test control console 1. A control button 34 is installed on the outside of the test control console 1 near the display screen 4. A mounting base 35 is fixedly installed at the bottom of the support frame 6. The mounting base 35 is fixedly installed on the top of the test control console 1.

[0022] A mounting bracket 21 is fixed to the outside of the placement frame 5 near the stepper motor 9. A mounting base 31 is fixed to the end of the mounting bracket 21 away from the placement frame 5. The stepper motor 9 is fixed to the outside of the mounting base 31. A limit gear 10 is fixed to the output end of the stepper motor 9. Two limit racks 11 are symmetrically and interlocked on both sides of the limit gear 10.

[0023] Each limiting rack 11 has a limiting slide seat 22 slidably engaged on one side of its outer surface. One end of the limiting slide seat 22 is fixedly installed on the bottom outer surface of the placement frame 5. A limiting groove 12 is opened through the inside of the side of the placement frame 5 near each limiting rack 11. A limiting rod 13 is fixedly installed inside the limiting groove 12.

[0024] A limiting slider 14 is slidably mounted on the outside of the limiting rod 13. One end of the limiting slider 14 is fixedly mounted on one end of a limiting rack 11 on the corresponding side. A limiting block 29 is fixedly mounted on the end of the limiting rod 13 away from the stepper control motor 9. A positioning block 15 is fixedly mounted on the end of the limiting slider 14 located inside the through groove 8.

[0025] An arc-shaped groove 30 is provided on one side of the positioning block 15 near the middle of the placement frame 5. A flexible adhesive block 16 is bonded and fixed on the inner wall of the arc-shaped groove 30. A pressure smart sensor 17 is embedded and fixed in the middle of the flexible adhesive block 16.

[0026] A connecting block 18 is fixedly installed at the output end of the electric telescopic rod 7. One end of the connecting block 18 is fixedly installed at the bottom end of the placement frame 5 near the stepper motor 9. Two auxiliary rods 19 are symmetrically slidably installed on both sides of the top of the support frame 6. Each auxiliary rod 19 has an auxiliary block 20 fixedly installed at both ends. One end of the auxiliary block 20 is fixedly installed at the bottom end of the placement frame 5.

[0027] In this embodiment, during the preparation stage of the inspection operation, the two electric telescopic rods 7 are in the extended state, and the placement frame 5 is moved along the auxiliary rod 19 to the initial position close to the annular inspection frame 2 through the connecting block 18; the stepper control motor 9 is in the initial open position, and drives the two side positioning blocks 15 to remain open through the transmission of the limit gear 10 and the limit rack 11, providing operating space for workpiece loading. The support frame 6 is firmly installed on the top of the inspection control console 1 through the bottom fixing seat 35, providing stable installation support for the placement frame 5 and the entire transmission structure; the auxiliary rod 19 is connected to the bottom of the placement frame 5 through the auxiliary blocks 20 at both ends, providing sliding guidance for the axial movement of the placement frame 5, ensuring the smoothness and coaxiality of the movement process. The operator places the flexible wire harness to be inspected on the top of the two placement frames 5, so that the wire harness crosses the area of ​​the annular hole 23 along the axial direction of the annular hole 23, completing the initial placement of the workpiece.

[0028] During the workpiece clamping stage, the operator issues a clamping command via the control button 34 on the detection control console 1, activating the stepper motor 9. The stepper motor 9 is securely fixed to the bottom of the placement frame 5 via the mounting base 31 and the mounting bracket 21. Its output end drives the limit gear 10 to rotate. The limit gear 10, through tooth surface meshing, drives the two staggered limit racks 11 on both sides to move in opposite directions along the corresponding limit slides 22. The limit racks 11 simultaneously drive the limit sliders 14 at their ends to slide along the limit rods 13 within the limit grooves 12, thereby driving the positioning blocks 15 on both sides to converge synchronously towards the center of the through groove 8. During the convergence process, the flexible rubber block 16 at the inner arc groove 30 of the positioning block 15 gradually contacts and adheres to the outer wall of the wire harness. The pressure intelligent sensor 17 embedded in the center of the flexible rubber block 16 collects the pressure value of the clamping contact surface in real time. , , To be the average compressive stress, The pressure area is the area under pressure, and the pressure value is... Feedback is sent to the control system of detection console 1; when the control system detects that the clamping pressure has reached a preset threshold... hour, Immediately, a lock command is sent to the stepper motor 9, causing it to stop and maintain its current output position, thus ensuring a stable clamping force on the positioning block 15. This closed-loop clamping control method allows the clamping force to adapt to flexible wire harnesses of different diameters and materials. It ensures sufficient clamping force to drive the wire harness through subsequent straightening and tensioning actions, reducing the probability of workpiece slippage during tensioning. It also prevents excessive clamping force from causing compression deformation of the wire harness cross-section, helping to ensure the geometric shape of the workpiece in the detection section is close to a natural, stress-free state, improving the accuracy of geometric dimension detection results. The limiting block 29 at the end of the limiting rod 13 limits the extreme travel of the limiting slider 14, preventing overtravel and derailment of the transmission structure.

[0029] During the workpiece straightening and tensioning stage, the electric telescopic rods 7 on both sides retract synchronously, pulling the placement frame 5 smoothly away from the annular detection frame 2 via the connecting block 18. Since the middle of the wire harness is clamped and fixed by the positioning block 15, as the placement frames 5 on both sides move outward synchronously, the clamping contact point between the positioning block 15 and the wire harness gradually moves from the middle position to both sides of the wire harness, which plays a straightening and correcting role for the wire harness, gradually smoothing out the natural curvature of the wire harness caused by its own flexibility and eliminating slack bending. When the electric telescopic rod 7 retracts to the preset stroke position, it stops and locks. At this time, the detection section of the wire harness corresponding to the annular hole 23 is in an axially tensioned suspended state, which can effectively reduce the interference of radial vibration and axial movement of the workpiece on the contour data acquisition during the detection process, and provide a stable workpiece posture for 360-degree annular contour geometry detection.

[0030] During the contour detection stage, after the workpiece posture is stabilized, the control system activates all the laser intelligent sensors 3 arranged around the inner wall of the annular hole 23. Each laser intelligent sensor 3 collects the local cross-sectional contour data of the wire harness at the corresponding angle. The data is transmitted to the detection control console 1 for splicing processing to obtain the complete 360-degree cross-sectional contour and dimensional parameters of the wire harness. The detection results can be displayed on the display screen 4 to complete the geometric quantity detection of the flexible wire harness.

[0031] After the inspection is completed, the stepper motor 9 runs in reverse, and through the transmission of the limit gear 10 and the limit rack 11, it drives the positioning blocks 15 on both sides to move in opposite directions, releasing the clamping state of the wire harness, and the operator can take out the inspected workpiece; then the electric telescopic rod 7 extends and resets, driving the placement rack 5 back to the initial loading position, waiting for the next inspection cycle.

[0032] Example 2: Please refer to Figures 8-11 This embodiment further describes Example 1, wherein a wiping shielding component is provided on the outer side of one end of the placement rack 5 away from the support frame 6.

[0033] The wiping and masking assembly includes an auxiliary ring 24 and a connecting frame 25. The auxiliary ring 24 is disposed in an annular hole 23. One end of the connecting frame 25 is fixedly installed on the inner wall of the auxiliary ring 24, and the other end of the connecting frame 25 is fixedly installed with a positioning seat 32. One side of the positioning seat 32 is threadedly connected to one end of the placement frame 5 by a positioning bolt 33.

[0034] A stop block 26 is fixed on one side of the auxiliary ring 24 near each laser smart sensor 3. A stop groove 27 is opened through the inside of the stop block 26. A sponge block 28 is fixed on the inner wall of the stop groove 27. One side of the sponge block 28 is attached to a laser smart sensor 3 on the corresponding side.

[0035] In this embodiment, the wiping and shielding component operates synchronously with the extension and retraction of the clamping, tensioning and straightening component, which is used to achieve surface cleaning and standby protection of the laser intelligent sensor 3. It belongs to the optical element status protection structure of the geometric quantity detection device. It can work in conjunction with the workpiece tension detection process without the need to add an independent drive source, which helps to maintain the measurement accuracy and stability of the detection device.

[0036] During the preparation stage of the inspection operation, the electric telescopic rods 7 on both sides are in the extended state, and the placement frame 5 is moved along the auxiliary rod 19 to the initial position close to the annular inspection frame 2 via the connecting block 18. The auxiliary ring 24 is connected to the positioning seat 32 via the connecting frame 25 and is fastened to the end of the placement frame 5 by the positioning bolt 33, and is synchronously in the initial position with the placement frame 5. At this time, the blocks 26 on the outer periphery of the auxiliary ring 24 respectively cover the outer side of the detection end face of each laser intelligent sensor 3. The sponge block 28 in the groove 27 inside the block 26 fits against the sensor end face, which can block dust, flocculent matter and oil mist in the production environment, reduce the adhesion of pollutants on the optical surface of the sensor, reduce the frequency of daily manual cleaning, and provide a basic guarantee for the long-term accuracy and stability of geometric quantity detection.

[0037] During the workpiece clamping and straightening tensioning stage, the stepper motor 9 starts and drives the positioning block 15 to clamp the middle of the wire harness through the transmission structure. Then, the electric telescopic rods 7 on both sides simultaneously retract, pulling the placement frame 5 to move smoothly away from the annular detection frame 2. The positioning block 15 moves outward synchronously with the placement frame 5, straightening and correcting the wire harness from the middle to both sides, gradually smoothing out the natural curvature of the wire harness and eliminating loose wrinkles. During this process, the placement frame 5 drives the auxiliary ring 24 to move axially synchronously along the axis of the annular hole 23 through the connecting frame 25. The stops 26 on the auxiliary ring 24 move axially along with it. The sponge block 28 in the stop groove 27 slides and wipes along the end face of the corresponding laser intelligent sensor 3, removing the floating dust and fine particles attached to the sensor surface. The wiping action is completed simultaneously with the workpiece straightening and tensioning action, without the need for additional drive components and control processes, and without increasing the cycle time of the inspection operation. It can automatically clean the sensor surface in each inspection cycle, reducing laser scattering and blurring of contour edges caused by surface contaminants, which helps to improve the accuracy of 360-degree ring contour geometric measurement data and the repeatability of inspection results.

[0038] When the electric telescopic rod 7 retracts to the preset travel position and locks, the detection section of the wire harness corresponding to the annular hole 23 is in a suspended state with axial tension, providing a stable measurement posture. At this time, the auxiliary ring 24 moves to the corresponding workstation with the placement frame 5, and each stop 26 completely moves out of the optical path acquisition area of ​​the laser intelligent sensor 3. The detection end faces of all sensors are completely open, with no extra structure obstructing the annular measurement optical path, ensuring the integrity of the 360-degree full-circumference contour data acquisition. Subsequently, the control system activates all the laser intelligent sensors 3 arranged around the inner wall of the annular hole 23. Each sensor collects the local cross-sectional contour data of the wire harness at the corresponding angle. The data is transmitted to the detection control console 1 for splicing processing to obtain the complete 360-degree cross-sectional contour and geometric dimensional parameters of the wire harness. The detection results can be displayed on the display screen 4.

[0039] After the inspection is completed, the stepper motor 9 reverses direction, driving the positioning blocks 15 on both sides to move in opposite directions through the transmission of the limit gear 10 and the limit rack 11, releasing the clamping state of the wire harness, allowing the operator to remove the inspected workpiece. Subsequently, the electric telescopic rod 7 extends and resets, pushing the placement frame 5 towards the ring inspection frame 2. The auxiliary ring 24 synchronously returns axially with the placement frame 5. During the return process, the sponge block 28 again wipes across the end face of the laser intelligent sensor 3, completing a secondary cleaning. When the placement frame 5 returns to the initial loading position, the auxiliary ring 24 synchronously resets to its initial position, and each stop block 26 re-covers the outside of the laser intelligent sensor 3, restoring the dustproof protection state, ready for the next inspection cycle.

[0040] The present invention also provides a method for detecting a 360-degree circular contour, comprising the following steps: S1: Place the flexible wire harness to be tested on top of the two placement racks 5, so that the wire harness spans the area of ​​the annular hole 23, and complete the initial placement; S2: Start the stepper motor 9, which is driven by the limit gear 10 and the limit rack 11 to drive the positioning blocks 15 on both sides to close and clamp the middle of the wire harness. After the pressure intelligent sensor 17 feedbacks that the standard is met, the stepper motor 9 is locked. S3: The electric telescopic rods 7 on both sides retract, causing the placement rack 5 to move outward. The positioning block 15 straightens and tightens the straight beam from the middle to both sides. The placement rack 5 synchronously drives the auxiliary ring 24 to move. The sponge block 28 wipes the laser intelligent sensor 3. S4: After the electric telescopic pole 7 retracts and locks, all laser intelligent sensors 3 are activated to perform 360-degree circular contour detection on the suspended and taut wire harness and collect cross-sectional contour dimension data. S5: After the inspection is completed, the stepper motor 9 reverses to loosen the wire harness, removes the workpiece, the electric telescopic rod 7 extends and resets, the auxiliary ring 24 returns to its original position synchronously, and the stop block 26 blocks the laser intelligent sensor 3 to complete the protection.

[0041] The following algorithm is a complete and runnable control algorithm adapted to this 360-degree ring contour detection device. It adopts a single-cycle finite state machine architecture to achieve full-process automatic control. All control logic and mechanical linkage relationships correspond one-to-one with the original device and can be directly implemented and run on an industrial controller (PLC / microcontroller).

[0042] The core algorithm is: , The actual radial height of the measured profile. For camera lens focal length, This represents the pixel offset of the laser stripe. The center-to-center distance between the laser and the camera lens; ; The x and y coordinates of a single sampling point on the circumference; The coordinates of the center of the circle obtained from the fitting; The radius of the fitted circle; By continuously calculating the parameters, the sum of the squares of the differences between the distances from all sampling points to the center of the circle and the standard radius is minimized, which is the least squares fitted circle.

[0043] System power-on initialization: The electric telescopic rod 7 extends to the zero position, driving the placement rack 5 to approach the annular detection rack 2. The stepper control motor 9 reverses to the open position, the positioning block 15 is fully open, the display screen 4 prompts standby material feeding, and the system enters standby mode.

[0044] Standby procedure: Detect the start signal of control button 34 on console 1, switch to clamping state after receiving the instruction, and start timeout protection.

[0045] Clamping process: The stepper motor 9 rotates synchronously, and through the limit gear 10 and the limit rack 11, it drives the positioning blocks 15 on both sides to close. The pressure intelligent sensor 17 embedded in the flexible rubber block 16 collects the value in real time. After the pressure at all measuring points reaches the standard, the stepper motor 9 is locked and switched to the tension state. If the timeout is exceeded, the fault state is switched, all outputs are stopped and an abnormality is indicated.

[0046] Tensioning process: The electric telescopic rod 7 retracts synchronously, and the connecting block 18 pulls the placement frame 5 to move outward along the auxiliary rod 19. The positioning block 15 clamps the wire harness to complete straightening, straightening and axial tensioning. The placement frame 5 drives the auxiliary ring 24 to move synchronously via the connecting frame 25. The sponge block 28 in the retaining groove 27 automatically wipes the end face of the laser intelligent sensor 3. After the electric telescopic rod 7 reaches the end of its stroke, it locks and switches to the detection state.

[0047] Detection process: Simultaneously trigger all laser intelligent sensors 3 on the inner wall of the annular hole 23 to sample, the controller converts the measured distances of each angle into rectangular coordinate contour points, splices them to obtain 360-degree cross-sectional contour data, calculates geometric parameters and outputs them to the display screen 4, and then switches to the reset state after completion.

[0048] Reset process: Stepper motor 9 reverses to release positioning block 15, electric telescopic rod 7 extends back to initial position, placement rack 5 drives auxiliary ring 24 to return to position synchronously, sponge block 28 wipes sensor end face a second time, finally stop block 26 blocks laser smart sensor 3 to complete dust protection, system returns to standby state and prompts for part retrieval.

[0049] Fault procedure: Lock all power output and display fault message. After detecting the reset signal of control button 34, stepper motor 9 and electric telescopic rod 7 return to their initial positions in sequence, clear the fault and switch back to standby mode.

[0050] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0051] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A 360-degree annular contour detection device, comprising a detection console (1), an annular detection frame (2) fixed to the top of the detection console (1), and an annular hole (23) opened in the middle of the annular detection frame (2), characterized in that: A number of laser smart sensors (3) are fixed around the inner wall of the annular hole (23). Two placement racks (5) are symmetrically arranged along the axis of the annular hole (23). A support frame (6) is vertically arranged on one side of the bottom end of each placement rack (5). A clamping, tensioning and straightening component is arranged on the outside of each placement rack (5). A wiping and shielding component is arranged on the outer side of one of the placement racks (5) away from the support frame (6). The clamping tensioning and straightening assembly includes a through slot (8), a stepper motor (9), and an electric telescopic rod (7). The through slot (8) is opened through the inside of the end of the placement frame (5) away from the support frame (6). The stepper motor (9) is located outside the bottom end of the placement frame (5) near the through slot (8). The electric telescopic rod (7) is fixedly installed on the outside of the support frame (6) on the side near the placement frame (5). The placement frame (5) is fixed with a mounting bracket (21) near the outside of the stepper motor (9). The mounting bracket (21) is fixed with a mounting base (31) at the end away from the placement frame (5). The stepper motor (9) is fixed to the outside of the mounting base (31). The output end of the stepper motor (9) is fixed with a limit gear (10). Two limit racks (11) are symmetrically and interlocked on both sides of the limit gear (10). The placement rack (5) has a limiting groove (12) through it on the side near each limiting rack (11), and a limiting rod (13) is fixedly installed inside the limiting groove (12). The limiting rod (13) is fitted with a sliding limiting slider (14), and a positioning block (15) is fixedly installed at one end of the limiting slider (14) inside the through groove (8). The positioning block (15) has an arc-shaped groove (30) on one side near the middle of the placement frame (5). A flexible adhesive block (16) is bonded and fixed on the inner wall of the arc-shaped groove (30). A pressure smart sensor (17) is embedded and fixed in the middle of the flexible adhesive block (16). The wiping and masking assembly includes an auxiliary ring (24) and a connecting frame (25). The auxiliary ring (24) is disposed in an annular hole (23), and one end of the connecting frame (25) is fixedly installed on the inner wall of the auxiliary ring (24). The auxiliary ring (24) has a stop block (26) fixed on one side near each laser smart sensor (3). The stop block (26) has a through groove (27) inside. A sponge block (28) is fixed on the inner wall of the groove (27). One side of the sponge block (28) is attached to a laser smart sensor (3) on the corresponding side.

2. The 360-degree annular contour detection device according to claim 1, characterized in that: A display screen (4) is installed on one side of the test console (1). A control button (34) is installed on the outside of the test console (1) near the display screen (4). A fixing seat (35) is fixedly installed at the bottom of the support frame (6). The fixing seat (35) is fixedly installed on the top outside of the test console (1).

3. The 360-degree annular contour detection device according to claim 1, characterized in that: Each of the limiting racks (11) has a limiting slide (22) slidably engaged on one side of its outer side, and one end of the limiting slide (22) is fixedly installed on the outer side of the bottom of the placement frame (5).

4. The 360-degree annular contour detection device according to claim 1, characterized in that: One end of the limiting slider (14) is fixedly installed on one end of a limiting rack (11) on the corresponding side, and a limiting block (29) is fixedly installed on the end of the limiting rod (13) away from the stepper control motor (9).

5. The 360-degree annular contour detection device according to claim 1, characterized in that: The output end of the electric telescopic rod (7) is fixedly installed with a connecting block (18). One end of the connecting block (18) is fixedly installed on the bottom end of the placement frame (5) near the stepper control motor (9). Two auxiliary rods (19) are symmetrically slidably installed on both sides of the top of the support frame (6). Each auxiliary rod (19) has an auxiliary block (20) fixedly installed at both ends. One end of the auxiliary block (20) is fixedly installed on the bottom end of the placement frame (5).

6. The 360-degree annular contour detection device according to claim 1, characterized in that: The other end of the connecting frame (25) is fixedly installed with a positioning seat (32), and one side of the positioning seat (32) is threadedly connected to one end of the placement frame (5) by a positioning bolt (33).

7. A method for detecting a 360-degree ring contour, comprising a 360-degree ring contour detection device according to any one of claims 1-6, characterized in that, Includes the following steps: S1: Place the flexible wire harness to be tested on top of the two placement racks (5) so that the wire harness spans the area of ​​the annular hole (23) to complete the initial placement; S2: Start the stepper motor (9), which is driven by the limit gear (10) and the limit rack (11) to move the positioning blocks (15) on both sides to close and clamp the middle of the wire harness. After the pressure intelligent sensor (17) feedback meets the standard, the stepper motor (9) locks. S3: The electric telescopic rods (7) on both sides retract and drive the placement rack (5) to move outward. The positioning block (15) straightens the straight beam from the middle to both sides and tightens it. The placement rack (5) drives the auxiliary ring (24) to move in sync. The sponge block (28) wipes the laser smart sensor (3). S4: After the electric telescopic pole (7) retracts and locks, all laser intelligent sensors (3) are activated to perform 360-degree circular contour detection on the suspended and taut wire harness and collect cross-sectional contour size data. S5: After the test is completed, the stepper motor (9) reverses to loosen the wire harness, removes the workpiece, the electric telescopic rod (7) extends and resets, the auxiliary ring (24) returns to its original position synchronously, and the stop block (26) blocks the laser intelligent sensor (3) to complete the protection.

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