A sole quality detection device and method for applying pressure
By integrating temperature control and adaptive clamping into the sole quality testing device, the problem of existing equipment being unable to simulate extreme environments has been solved, achieving efficient and accurate sole quality testing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHONGQING QIANG SHENG WANG SHOES CO LTD
- Filing Date
- 2026-03-25
- Publication Date
- 2026-06-12
AI Technical Summary
Existing shoe sole quality testing equipment cannot simulate extremely cold or high temperature environments, resulting in inaccurate test results. Furthermore, rigid clamps are difficult to stabilize the shoe sole, affecting the accuracy of test data.
A shoe sole quality inspection device integrating temperature control, adaptive clamping, and visual inspection was designed. It simulates a multi-temperature environment through a pressurized cylinder, a rotating motor, and a flexible clamping component, and realizes a fully automated inspection process.
It can accurately reproduce the stress performance of the shoe sole in extremely cold or high temperature environments, avoid testing errors caused by unstable clamping, and improve testing efficiency and data accuracy.
Smart Images
Figure CN122192958A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of quality inspection technology, and in particular to a device and method for inspecting the quality of shoe soles by applying pressure. Background Technology
[0002] As a core component of footwear, the sole's pressure resistance, rebound ability, and stability in extreme environments directly determine the comfort and safety of wear. Existing sole quality testing technologies have the following limitations: Traditional testing equipment mostly performs pressure tests only at room temperature, which cannot simulate actual working conditions such as extreme cold (e.g., icy and snowy roads causing materials to harden and become brittle) or high temperatures (e.g., asphalt roads causing materials to soften and become more viscous). This results in test results that cannot truly reflect the compressive strength limit and brittle / plastic changes of the sole under special environments, making it difficult to meet the research and development verification needs of footwear for special scenarios such as polar expeditions and high-temperature operations.
[0003] Existing devices mostly use rigid clamps to fix the shoe sole. Due to the complex curvature of the shoe sole, rigid clamps often cannot fit perfectly, which can easily lead to pre-stress due to excessive clamping at the beginning of the test, or cause the shoe sole to slip laterally during the test due to unstable clamping. This not only affects the accuracy of the test data, but may also lead to misjudgment of microcracks. Summary of the Invention
[0004] The purpose of this invention is to provide a shoe sole quality inspection device and method that applies pressure, which can simulate multi-temperature environments, has adaptive flexible clamping function, and integrates automatic material handling and visual inspection to improve inspection efficiency.
[0005] To achieve the above objectives, in a first aspect, the present invention provides a shoe sole quality testing device for applying pressure, comprising a support component, a pressure application component, a material handling component, a temperature control component, and a visual inspection component. The support component includes a base, a support frame, and a test box. The support frame is fixedly connected to the base and is located on one side of the base, and the test box is located on one side of the support frame. The pressurization assembly includes a pressurization cylinder and a pressurization plate. The pressurization cylinder is fixed on the support frame, and the pressurization plate is connected to the output end of the pressurization cylinder. The material handling assembly includes a lateral mover, a rotating rod, a rotating motor, a bent rod, a supporting rod, a moving structure, and a pressure plate. The lateral mover is disposed on the pressure plate, the rotating motor is fixed on the lateral mover, the rotating rod is connected to the output end of the rotating motor, the bent rod is fixed to the rotating rod, the supporting rod is rotatably disposed on one side of the bent rod for supporting one side of the shoe sole, the pressure plate is slidably disposed below the bent rod for supporting the bottom of the shoe sole, and the moving structure is used to move the supporting rod and the pressure plate. The temperature control component is installed inside the test chamber, and the visual detection component is used to detect changes in the sole of the shoe.
[0006] The test chamber includes a conveyor plate, a conveyor cylinder, a chamber body, and a cover plate. The cover plate is rotatably connected to the chamber body and is located at the entrance of the chamber body. The conveyor plate is slidably disposed inside the chamber body, and the output end of the conveyor cylinder is connected to the conveyor plate.
[0007] The lateral mover includes a moving block, a moving motor, and a screw. The moving block is slidably disposed on the pressure plate, the screw is threadedly connected to the moving block, and the output end of the moving motor is connected to the moving block.
[0008] The abutment rod includes a push rod, an abutment rod body, and a return spring. The abutment rod body is rotatably disposed on one side of the bent rod. One end of the push rod is rotatably connected to the abutment rod body, and the other end of the push rod is connected to the moving structure. The return spring is disposed between the abutment rod body and the bent rod.
[0009] The abutment rod further includes a spherical abutment block, which is disposed on one side of the abutment rod body and is used to contact the sole of the shoe.
[0010] The movable structure includes a first slider, a second slider, an elastic connecting rod, and a pushing cylinder. The first slider is slidably disposed on the bent rod and located on one side of the supporting rod body. The second slider is slidably disposed on the bent rod and located on one side of the pressure plate. The elastic connecting rod is disposed between the first slider and the second slider. The output end of the pushing cylinder is elastically connected to the first slider.
[0011] The material handling assembly further includes a second spring, which is disposed between the pressure plate and the bent rod.
[0012] The temperature control component includes a heater, a circulating fan, a temperature sensor, and a controller. The heater is located inside the test chamber, the circulating fan is located on one side of the heater, the temperature sensor is located inside the test chamber, and the controller is connected to the temperature sensor and the heater.
[0013] The visual detection component includes an image capture module, a sole image extraction module, a sole height calculation module, and a judgment module. The imaging module is used to acquire normal images and pressure test images of the shoe sole; The sole image extraction module is used to extract normal sole data and pressure test data based on normal sole images and pressure test images. The sole height calculation module is used to calculate the normal sole height and the test sole height based on normal sole data and pressure test data. The judgment module is used to determine whether the sole quality is qualified based on the difference between the normal sole height and the test sole height.
[0014] Secondly, the present invention provides a method for testing the quality of shoe soles by applying pressure, using the aforementioned device for testing the quality of shoe soles by applying pressure.
[0015] This invention discloses a pressure-applying shoe sole quality testing device and method. The pressure cylinder is a high-precision servo cylinder, fixed to the top of a support frame, capable of precisely controlling the output force and loading rate to achieve constant pressure, pressure boosting, or cyclic fatigue testing modes. A pressure plate is connected to the cylinder output end, and its lower surface can be fitted with different curvature simulated foot sole modules depending on the shoe sole type, ensuring uniform pressure distribution in key stress areas of the sole. A lateral mover is mounted on the pressure plate, rising and falling synchronously with it, while also possessing independent lateral displacement capabilities for flexible positioning within space. A rotary motor drives a rotating rod to rotate, thereby adjusting the angle of a bent rod, allowing the clamping mechanism to adapt to soles with different tilt angles. A support rod is rotatably positioned on one side of the bent rod, with a high-friction coefficient flexible pad at its end for supporting the side or edge of the sole and preventing lateral slippage. A pressure plate is slidably positioned below the bent rod, specifically for supporting and supporting the bottom of the sole. The moving structure acts as the driving core, coordinating the relative movement of the support rod and the pressure plate. When gripping soles of different sizes, the moving structure automatically adjusts the distance between them to form a stable "side-wrapping bottom support" posture, which not only ensures the gripping force but also avoids pre-deformation of the sole due to excessive gripping, thus ensuring the authenticity of the test data.
[0016] The temperature control component is integrated inside the test chamber and can precisely regulate the temperature within the test chamber within a range of -20℃ to +60℃, simulating the working conditions of extremely cold icy and snowy roads or high-temperature asphalt roads, to detect the compressive strength limit and brittle / plastic changes of the sole material under extreme temperatures. The visual inspection component is deployed inside the test chamber or at the observation window and consists of a high-resolution industrial camera and a light source system.
[0017] During the pressurization process, image data of the sole surface is acquired in real time. Through image processing algorithms, the generation and propagation paths of microcracks and the macroscopic deformation curve of the sole are automatically identified and marked, generating a visualized stress-strain analysis report.
[0018] Compared with the prior art, the present invention has the following significant advantages: By linking the temperature control and pressurization components, this device overcomes the limitations of traditional room-temperature testing. It can realistically reproduce the stress performance of shoe soles under extreme cold (materials become hard and brittle) or high temperature (materials become soft and more viscous). This has irreplaceable verification value for developing footwear products suitable for special scenarios such as polar expeditions and high-temperature operations, effectively avoiding the risk of product breakage or failure due to unsuitable environments during actual use.
[0019] Traditional rigid clamps are prone to causing pre-stress at the beginning of testing due to mismatch in shoe sole curvature, or slippage during testing due to unstable clamping. The material handling component of this invention, through the coordinated operation of a rotating motor, bending rod, abutment rod, and pressure plate, constructs a bidirectional adaptive clamping mode of "lateral abutment + bottom support": Integrating material handling, pressurization, temperature control, and detection into one unit, the lateral mover and the moving structure work together to achieve a fully automated "grab-box-test-box-out" process. This eliminates the efficiency bottlenecks and safety risks associated with manual loading and unloading. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.
[0021] Figure 1 This is a structural diagram of the first embodiment of the present invention.
[0022] Figure 2 This is a front structural diagram of the first embodiment of the present invention.
[0023] Figure 3 yes Figure 2 A magnified view of detail B.
[0024] Figure 4 This is a cross-sectional structural diagram of the first embodiment of the present invention.
[0025] Figure 5 yes Figure 4 A magnified view of detail A.
[0026] Figure 6 This is a structural diagram of the visual inspection component according to the first embodiment of the present invention.
[0027] In the diagram: base 101, support frame 102, test box 103, pressurizing cylinder 104, pressurizing plate 105, lateral mover 106, rotating rod 107, rotating motor 108, bending rod 109, abutting rod 110, moving structure 111, pressure plate 112, conveying plate 113, conveying cylinder 114, box body 115, cover plate 116, moving block 117, moving motor 118, screw 119, pushing rod 120, abutting rod body 121, return spring 122, spherical abutting block 123, first slider 124, second slider 125, elastic connecting rod 126, pushing cylinder 127, second spring 128, heater 129, circulating fan 130, temperature sensor 131, shooting module 133, shoe sole image extraction module 134, shoe sole height calculation module 135, judgment module 136. Detailed Implementation
[0028] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.
[0029] First embodiment: Please refer to Figures 1-6This invention provides a pressure-applying shoe sole quality testing device, comprising a support assembly, a pressurizing assembly, a material handling assembly, a temperature control assembly, and a visual inspection assembly. The support assembly includes a base 101, a support frame 102, and a test chamber 103. The support frame 102 is fixedly connected to the base 101 and located on one side of the base 101, while the test chamber 103 is located on one side of the support frame 102. The pressurizing assembly includes a pressurizing cylinder 104 and a pressurizing plate 105. The pressurizing cylinder 104 is fixed to the support frame 102, and the pressurizing plate 105 is connected to the output end of the pressurizing cylinder 104. The material handling assembly includes a lateral mover 106, a rotating rod 107, a rotating motor 108, a bending rod 109, and a supporting rod 100. 10. A movable structure 111 and a pressure plate 112 are included. The lateral mover 106 is mounted on the pressure plate 105. The rotary motor 108 is fixed on the lateral mover 106. The rotary rod 107 is connected to the output end of the rotary motor 108. The bent rod 109 is fixed to the rotary rod 107. The abutment rod 110 is rotatably mounted on one side of the bent rod 109 to abut one side of the sole. The pressure plate 112 is slidably mounted below the bent rod 109 to abut the bottom of the sole. The movable structure 111 is used to move the abutment rod 110 and the pressure plate 112. The temperature control component is located inside the test chamber 103. The visual detection component is used to detect changes in the sole.
[0030] In this embodiment, the base 101 is made of high-strength alloy steel to ensure the levelness and stability of the entire machine under high-pressure testing. The support frame 102 is vertically fixed to one side of the base 101, serving as the mounting carrier for the pressurization components. Its structural design has been mechanically optimized to counteract the reaction force generated by pressurization. The test chamber 103 is located beside the support frame 102, forming a closed, independent test space. This chamber 115 not only accommodates the shoe sole under test but also serves as the operating location for the temperature control components, ensuring the uniformity of the testing environment.
[0031] The pressurized cylinder 104 is an intelligent actuator integrating a low-friction cylinder body, a high-precision displacement sensor, and a high-speed servo proportional valve. Its core control logic lies in closed-loop feedback: a force sensor installed at the end of the piston rod monitors the output force value in real time and feeds it back to the controller; the controller compares this actual value with the user-set target value, calculates the deviation using a PID algorithm, and instructs the servo proportional valve to instantaneously adjust the airflow and pressure entering and exiting the cylinder. This process is completed within milliseconds, thereby achieving precise control over the output force and loading rate.
[0032] Thanks to its high-precision control system, this equipment supports a variety of complex testing modes. In constant pressure mode, it automatically compensates for workpiece deformation to maintain a constant set pressure, suitable for creep or leakage testing. In booster mode, it precisely and linearly increases pressure at a set slope (e.g., N / s) to determine the ultimate strength of materials. In cyclic fatigue testing mode, it can output periodic forces such as sine waves and triangular waves to simulate the actual working conditions of products under long-term alternating stress, providing crucial data for the study of material mechanical properties and the verification of product reliability. The pressure plate 105 is connected to the cylinder output end, and its lower surface can be replaced with a foot-like module of different curvatures according to the type of shoe sole, ensuring that the pressure is evenly distributed in the key stress areas of the shoe sole.
[0033] The lateral mover 106 is mounted on the pressure plate 105 and rises and falls synchronously with the pressure plate 105. It also has independent lateral displacement capability, enabling flexible positioning within space. The rotary motor 108 drives the rotating rod 107 to rotate, which in turn drives the bent rod 109 to adjust its angle, allowing the clamping mechanism to adapt to shoe soles with different tilt angles.
[0034] The abutment rod 110 is rotatably mounted on one side of the curved rod 109, and its end is equipped with a flexible pad with a high coefficient of friction to abut the side or edge of the sole and prevent lateral slippage. The pressure plate 112 is slidably mounted below the curved rod 109 and is specifically designed to support and abut the bottom of the sole. The moving structure 111 acts as the driving core, coordinating the relative movement of the abutment rod 110 and the pressure plate 112. When gripping soles of different sizes, the moving structure 111 automatically adjusts the distance between the two to form a stable "side-wrapping bottom support" posture, which ensures both clamping force and avoids pre-deformation of the sole due to excessive clamping, thus ensuring the authenticity of the test data.
[0035] To achieve precise temperature control within the wide temperature range of -20℃ to +60℃ inside the test chamber 103, the temperature control component typically employs a composite temperature control method combining compressor refrigeration and electric heating tube heating. On the refrigeration side, a fully enclosed compressor, condenser, and evaporator form a cycle, utilizing the phase change of the refrigerant to absorb heat from the chamber and achieve cooling. On the heating side, stainless steel electric heating tubes convert electrical energy into heat energy. Temperature sensors (such as PT100 platinum resistance thermometers) monitor the chamber temperature in real time and provide feedback to the temperature controller. The temperature controller uses a PID algorithm to precisely control the on / off state of the refrigeration solenoid valve and the output power of the heating tube, thereby stabilizing the temperature at the set value and ensuring a uniform and stable temperature field within the chamber.
[0036] To simulate extremely cold icy and snowy roads as well as hot asphalt roads, the design of the temperature control components needs to consider the speed and uniformity of the switching between operating conditions. When simulating low-temperature environments, the system may activate fans for forced circulation to prevent cold air from accumulating at the bottom and causing temperature stratification. Microporous air delivery can also be used to ensure the cold airflow evenly coats the sample. When simulating high-temperature environments, heating elements are typically placed on the side walls or bottom of the chamber, combined with a high-temperature resistant circulating fan to prevent localized overheating. For simulating icy and snowy roads, a humidity control system or spray device may also be needed to form an ice layer on the sample surface at low temperatures, realistically reproducing the friction and impact conditions of shoe soles contacting ice and snow.
[0037] When shoe sole materials are subjected to extreme temperatures inside the chamber, the high precision and stability of the temperature control components directly affect the reliability of the test results. At the low temperature end (-20℃), the material exhibits brittleness due to the freezing of molecular chain segments; impact or pressure applied by a cylinder can detect whether brittle fracture occurs. At the high temperature end (+60℃), the material's molecular chain mobility increases, potentially leading to softening or plastic deformation; applying pressure at this point can test its compressive strength and creep resistance. The temperature control system ensures that the sample is adequately soaked at the target temperature, allowing the internal temperature of the material to match its surface temperature, thereby accurately assessing changes in its mechanical behavior under extreme temperatures.
[0038] The visual inspection component is deployed inside the test chamber 103 or at the observation window, and consists of a high-resolution industrial camera and a light source system.
[0039] During the pressurization process, image data of the sole surface is acquired in real time. Through image processing algorithms, the generation and propagation paths of microcracks and the macroscopic deformation curve of the sole are automatically identified and marked, generating a visualized stress-strain analysis report.
[0040] Compared with the prior art, the present invention has the following significant advantages: By linking the temperature control and pressurization components, this device overcomes the limitations of traditional room-temperature testing. It can realistically reproduce the stress performance of shoe soles under extreme cold (materials become hard and brittle) or high temperature (materials become soft and more viscous). This has irreplaceable verification value for developing footwear products suitable for special scenarios such as polar expeditions and high-temperature operations, effectively avoiding the risk of product breakage or failure due to unsuitable environments during actual use.
[0041] Traditional rigid clamps are prone to causing pre-stress in the early stages of testing due to mismatches in the curvature of the shoe sole, or slippage during testing due to unstable clamping. The material handling assembly of this invention, through the coordinated operation of the rotating motor 108, the bent rod 109, the supporting rod 110, and the pressure plate 112, constructs a bidirectional adaptive clamping mode of "lateral support + bottom lifting": By integrating material handling, pressurization, temperature control, and detection into one unit, the cooperation between the lateral mover 106 and the moving structure 111 realizes a fully automated "grab-box-test-box-out" process. This eliminates the efficiency bottlenecks and safety risks associated with manual loading and unloading.
[0042] The test chamber 103 includes a conveyor plate 113, a conveyor cylinder 114, a chamber body 115, and a cover plate 116. The cover plate 116 is rotatably connected to the chamber body 115 and is located at the entrance of the chamber body 115. The conveyor plate 113 is slidably disposed inside the chamber body 115. The output end of the conveyor cylinder 114 is connected to the conveyor plate 113.
[0043] The conveying cylinder 114 extends the conveying plate 113 to the entrance of the chamber 115, and the cover 116 rotates open. The shoe sole is then placed on the conveying plate 113. Subsequently, the conveying cylinder 114 retracts, pushing the conveying plate 113 smoothly into the testing core area inside the chamber 115 carrying the shoe sole. After the conveying plate 113 is positioned and locked (or its position is maintained by cylinder pressure), the temperature control component adjusts the temperature inside the chamber, the pressurization component applies pressure to the shoe sole, and the visual inspection component records data through the observation window or internal camera. Upon completion of the test, the pressurization component resets, the conveying cylinder 114 retracts, pulling the conveying plate 113 back to the entrance, the cover 116 opens, and the material handling component removes the finished product.
[0044] The lateral mover 106 includes a moving block 117, a moving motor 118, and a screw 119. The moving block 117 is slidably disposed on the pressure plate 105. The screw 119 is threadedly connected to the moving block 117. The output end of the moving motor 118 is connected to the moving block 117.
[0045] The rotation of screw 119 forces the threadedly connected movable block 117 to slide smoothly along the guide rail on the surface of pressure plate 105, horizontally moving the sole suspended below movable block 117 (via bent rod 109, abutment rod 110, etc.) into the central testing area of test chamber 103, or adjusting it to the optimal shooting angle of visual inspection component. During the pressure test, if it is necessary to simulate the deformation of the sole at different stress points (such as simulating the center of gravity shift during walking), the moving motor 118 can finely adjust the position of movable block 117 in real time according to a preset program, driving the sole to make a small lateral displacement, realizing a composite loading test of "pressure + displacement".
[0046] The abutment rod 110 includes a push rod 120, an abutment rod body 121, and a return spring 122. The abutment rod body 121 is rotatably disposed on one side of the bent rod 109. One end of the push rod 120 is rotatably connected to the abutment rod body 121, and the other end of the push rod 120 is connected to the moving structure 111. The return spring 122 is disposed between the abutment rod body 121 and the bent rod 109.
[0047] The abutment rod body 121 is rotatably mounted on one side of the bent rod 109 via a pin, allowing it to swing around a fulcrum like a lever, thereby changing the contact angle with the sole. The push rod 120, acting as a transmission medium, is rotatably connected at one end to the abutment rod body 121 and at the other end to the moving structure 111. When the moving structure 111 moves, the push rod 120 pushes and pulls the abutment rod body 121, forcing it to rotate around its axis, thus switching the action from "opening" to "clamping". A return spring 122 is pre-tensioned between the abutment rod body 121 and the bent rod 109. When the driving force is removed or excessive reverse resistance is encountered, the return spring 122 provides a restoring force, causing the abutment rod 110 to automatically return to its initial open position or maintain a constant pre-tension, preventing damage to the sole sidewall due to overpressure.
[0048] The abutment rod 110 also includes a spherical abutment block 123, which is disposed on one side of the abutment rod body 121 and is used to contact the sole of the shoe.
[0049] A spherical abutment block 123 (such as a high-friction polyurethane ball joint or a universal ball joint) is located at the end of the abutment rod body 121 and is the component that directly contacts the side of the sole being tested. The spherical structure gives the contact point a multi-degree-of-freedom rotational capability. Regardless of whether the side of the sole is vertical, inclined, or has a complex curvature, the spherical abutment block 123 can automatically adjust the contact tangent through self-rotation, transforming the traditional "line / surface hard contact" into "adaptive point contact," ensuring that the clamping force is perpendicular to the normal of the contact surface, and avoiding scratching the sole surface or causing local dents.
[0050] The movable structure 111 includes a first slider 124, a second slider 125, an elastic connecting rod 126, and a pushing cylinder 127. The first slider 124 is slidably disposed on the bent rod 109 and located on one side of the abutment rod body 121. The second slider 125 is slidably disposed on the bent rod 109 and located on one side of the pressure plate 112. The elastic connecting rod 126 is disposed between the first slider 124 and the second slider 125. The output end of the pushing cylinder 127 is elastically connected to the first slider 124.
[0051] The material handling assembly also includes a second spring 128, which is disposed between the pressure plate 112 and the bent rod 109.
[0052] The first slider 124 is slidably mounted on the curved rod 109, located on one side of the abutment rod body 121, and is responsible for driving the lateral clamping action. The second slider 125 is slidably mounted on the curved rod 109, located on one side of the pressure plate 112 (bottom support plate), and is responsible for driving the bottom support action. An elastic connecting rod 126 (such as a telescopic rod with a built-in compression spring or a rubber connecting rod) connects the first slider 124 and the second slider 125. This design allows the movements of the two sliders to be both interconnected and relatively independent. The output end of the push cylinder 127 is elastically connected to the first slider 124 (e.g., through a buffer pad or a small spring).
[0053] The cylinder 127 is pushed out, which first pushes the first slider 124 to move, causing the push rod 120 to rotate the abutment rod body 121, and the spherical abutment block 123 to contact the side of the shoe sole.
[0054] Simultaneously, force is transmitted to the second slider 125 via the elastic connecting rod 126, causing the pressure plate 112 to move downwards and press against the bottom of the sole. If there is a deviation in the sole size (such as a large lateral curvature), the first slider 124 can be in place first. At this time, the elastic connecting rod 126 is stretched, allowing the second slider 125 to move slightly later until the pressure plate 112 is also tightly fitted to the bottom of the sole. This "soft connection" ensures that regardless of the shape of the sole, lateral support and bottom support can achieve optimal fit simultaneously without interference or suspension.
[0055] When the pressure plate 112 lifts the sole upwards or the pressure assembly applies downward pressure, the second spring 128 acts as a vertical damper. It absorbs the instantaneous impact force and provides a constant floating lifting force. Even if the pressure cylinder 104 presses down excessively, the compression of the second spring 128 prevents the pressure plate 112 from rigidly damaging the sole structure, acting as a "mechanical fuse."
[0056] The temperature control component includes a heater 129, a circulating fan 130, a temperature sensor 131, and a controller. The heater 129 is disposed inside the test chamber 103, the circulating fan 130 is disposed on one side of the heater 129, the temperature sensor 131 is disposed inside the test chamber 103, and the controller is connected to the temperature sensor 131 and the heater 129.
[0057] The user sets the target temperature (e.g., -20℃ or +60℃). The controller starts the circulating fan 130 to establish an air circulation flow field inside the chamber.
[0058] If heating is required, the controller outputs the corresponding power to drive the heater 129 to work based on the difference between the current temperature and the target temperature.
[0059] The circulating fan 130 blows heated air at high speed into the chamber, simultaneously drawing cool air back to the heater 129 for reheating, creating a highly efficient turbulent circulation. When the temperature approaches the target value, the controller uses a PID algorithm to automatically reduce the power of the heater 129 to prevent overshoot. When temperature fluctuations occur due to the placement of low-temperature shoe soles, the sensor immediately detects the change, and the controller instantly increases the heating power to compensate. Once the temperature reaches the set value and stabilizes, the controller enters a fine-tuning mode, maintaining a constant temperature with minimal power fluctuations, ensuring that the ambient temperature error is controlled within ±0.5℃ or even lower throughout the entire test.
[0060] The visual inspection component includes an imaging module 133, a sole image extraction module 134, a sole height calculation module 135, and a judgment module 136. The imaging module 133 is used to acquire normal sole images and pressure test images. The sole image extraction module 134 is used to extract normal sole data and pressure test data based on the normal sole images and pressure test images. The sole height calculation module 135 is used to calculate the normal sole height and the test sole height based on the normal sole data and the pressure test data. The judgment module 136 is used to judge whether the sole quality is qualified based on the difference between the normal sole height and the test sole height.
[0061] The shooting module 133 consists of a high-resolution industrial camera (such as a global shutter camera with more than 5 million pixels), a telecentric lens, and a multi-angle ring shadowless light source. It is installed behind the external observation window or internal protective cover of the test box 103 to ensure that it is not affected by temperature and humidity.
[0062] In the initial state, with the pressure component not in contact with the sole or at zero pressure, the image is triggered to record the baseline shape of the sole in its natural relaxed state. At the instant the pressure component applies a set pressure (such as peak pressure simulating human body weight) and maintains stability, the image is triggered again to record the deformation shape of the sole under compression. This synchronous triggering mechanism ensures strict alignment of the spatial coordinate systems of the two images, eliminating registration errors caused by equipment vibration or sample displacement.
[0063] The sole image extraction module 134 preprocesses the "normal sole image" (denoising and enhancement) to accurately segment the sole outline, key feature points (such as the highest point of the heel and the forefoot contact point) and texture information, generating reference point cloud data or a two-dimensional coordinate set. The same processing flow is performed on the "stress test image" to extract the sole outline and feature point coordinates under stress.
[0064] The sole height calculation module 135, based on the principle of binocular stereo vision or a known calibrated monocular perspective transformation model, converts the extracted two-dimensional image data into three-dimensional spatial coordinates. Based on normal sole data, it calculates the vertical distance of key parts of the sole (usually the thickness or overall profile height of the area under maximum stress) relative to a reference plane. Based on pressure test data, it calculates the vertical distance of the same part under pressure.
[0065] The judgment module 136 calculates the height change in real time, which represents the compression deformation of the sole under a specific pressure.
[0066] If the height change is within the preset standard range and the recovery rate after unloading (optional secondary shooting) meets the requirements, it is judged as qualified (indicating that the sole has moderate elasticity and good support); if the height change is too large, it is judged as unqualified (indicating that the sole is too soft, collapsed, or has internal structural breakage); if the height change is too small, it is judged as unqualified (indicating that the sole is too hard, lacks cushioning performance, or the material is aging and brittle).
[0067] Second embodiment: The present invention provides a method for testing the quality of shoe soles by applying pressure, using the aforementioned device for testing the quality of shoe soles by applying pressure.
[0068] The operator or host computer system sets the target test temperature (e.g., -20℃ to simulate extreme cold, or +60℃ to simulate extreme heat) and target pressure value (e.g., simulating peak adult walking pressure of 800N) according to the test standards (such as ISO, ASTM, or internal control standards). The temperature control components of the device are then activated. The circulating fan 130 starts operating first to establish the airflow, followed by the heater 129 (or in conjunction with the cooling unit). The temperature sensor 131 provides real-time feedback on the temperature inside the chamber, and the controller executes a PID algorithm to adjust the power until the temperature inside the test chamber 103 reaches the set value and remains stable (fluctuation range ≤ ±0.5℃).
[0069] The material handling component is activated, and the moving motor 118 drives the lateral mover 106 to move the sole horizontally into the central area of the test chamber 103.
[0070] The cylinder 127 is activated, which drives the first slider 124 and the second slider 125 in the moving structure 111 to move in coordination.
[0071] Through the buffer transmission of the elastic connecting rod 126, the abutment rod body 121 drives the spherical abutment block 123 to contact the side of the shoe sole in a flexible manner, automatically adapting to the irregular curvature of the shoe sole; at the same time, the pressure plate 112 contacts the bottom of the shoe sole under the buffer of the second spring 128.
[0072] The return spring 122 and the dual buffer mechanism ensure that the clamping force is moderate, which not only fixes the sole of the shoe to prevent slippage, but also avoids pre-damage caused during the clamping process.
[0073] Before pressurization, the imaging module 133 of the visual detection component triggers the first image capture to obtain a normal image of the sole. The sole image extraction module 134 then processes the image, extracts feature points, and the sole height calculation module 135 calculates the normal sole height to establish baseline data.
[0074] The pressurizing component (such as a servo electric cylinder or a precision pneumatic cylinder) is activated, driving the pressure head to move downwards at a constant rate until it contacts the surface of the shoe sole; the pressure sensor monitors the contact force in real time and feeds it back to the controller to adjust the output, ensuring that the applied pressure is accurately and stably maintained at the set value (such as 800N) and held for a preset time (such as 10 seconds) to simulate the real force state.
[0075] After holding the pressure for a certain period of time, the imaging module 133 triggers a second imaging session to acquire a pressure test image. At this time, the sole of the shoe is in a state of maximum compression.
[0076] The sole image extraction module 134 performs noise reduction and segmentation on the pressure test image, extracts the contour data under stress, and generates pressure test data.
[0077] The sole height calculation module 135 calculates the current test sole height based on pressure test data. During this process, the algorithm automatically compensates for optical refraction errors or material thermal expansion and contraction disturbances caused by temperature changes.
[0078] The system automatically calculates the height difference, which directly reflects the amount of compression deformation of the sole under specific temperature and pressure conditions.
[0079] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.
Claims
1. A device for detecting the quality of shoe soles by applying pressure, characterized in that, It includes a support assembly, a pressurization assembly, a material handling assembly, a temperature control assembly, and a vision inspection assembly. The support assembly includes a base, a support frame, and a test chamber. The support frame is fixedly connected to the base and is located on one side of the base. The test chamber is located on one side of the support frame. The pressurization assembly includes a pressurization cylinder and a pressurization plate. The pressurization cylinder is fixed on the support frame, and the pressurization plate is connected to the output end of the pressurization cylinder. The material handling assembly includes a lateral mover, a rotating rod, a rotating motor, a bent rod, a supporting rod, a moving structure, and a pressure plate. The lateral mover is disposed on the pressure plate, the rotating motor is fixed on the lateral mover, the rotating rod is connected to the output end of the rotating motor, the bent rod is fixed to the rotating rod, the supporting rod is rotatably disposed on one side of the bent rod for supporting one side of the shoe sole, the pressure plate is slidably disposed below the bent rod for supporting the bottom of the shoe sole, and the moving structure is used to move the supporting rod and the pressure plate. The temperature control component is installed inside the test chamber, and the visual detection component is used to detect changes in the sole of the shoe.
2. The pressure-applying shoe sole quality testing device as described in claim 1, characterized in that, The test chamber includes a conveyor plate, a conveyor cylinder, a chamber body, and a cover plate. The cover plate is rotatably connected to the chamber body and is located at the entrance of the chamber body. The conveyor plate is slidably disposed inside the chamber body, and the output end of the conveyor cylinder is connected to the conveyor plate.
3. The pressure-applying shoe sole quality testing device as described in claim 2, characterized in that, The lateral mover includes a moving block, a moving motor, and a screw. The moving block is slidably disposed on the pressure plate, the screw is threadedly connected to the moving block, and the output end of the moving motor is connected to the moving block.
4. The pressure-applying shoe sole quality testing device as described in claim 3, characterized in that, The abutment rod includes a push rod, an abutment rod body, and a return spring. The abutment rod body is rotatably disposed on one side of the bent rod. One end of the push rod is rotatably connected to the abutment rod body, and the other end of the push rod is connected to the moving structure. The return spring is disposed between the abutment rod body and the bent rod.
5. The pressure-applying shoe sole quality testing device as described in claim 4, characterized in that, The abutment rod also includes a spherical abutment block, which is disposed on one side of the abutment rod body and is used to contact the sole of the shoe.
6. The pressure-applying shoe sole quality testing device as described in claim 5, characterized in that, The moving structure includes a first slider, a second slider, an elastic connecting rod, and a pushing cylinder. The first slider is slidably disposed on the bent rod and located on one side of the abutment rod body. The second slider is slidably disposed on the bent rod and located on one side of the pressure plate. The elastic connecting rod is disposed between the first slider and the second slider. The output end of the pushing cylinder is elastically connected to the first slider.
7. The pressure-applying shoe sole quality testing device as described in claim 6, characterized in that, The material handling assembly also includes a second spring, which is disposed between the pressure plate and the bent rod.
8. The pressure-applying shoe sole quality testing device as described in claim 7, characterized in that, The temperature control component includes a heater, a circulating fan, a temperature sensor, and a controller. The heater is located inside the test chamber, the circulating fan is located on one side of the heater, the temperature sensor is located inside the test chamber, and the controller is connected to the temperature sensor and the heater.
9. The pressure-applying shoe sole quality testing device as described in claim 8, characterized in that, The visual detection component includes a shooting module, a sole image extraction module, a sole height calculation module, and a judgment module; The imaging module is used to acquire normal images and pressure test images of the shoe sole; The sole image extraction module is used to extract normal sole data and pressure test data based on normal sole images and pressure test images. The sole height calculation module is used to calculate the normal sole height and the test sole height based on normal sole data and pressure test data. The judgment module is used to determine whether the sole quality is qualified based on the difference between the normal sole height and the test sole height.
10. A method for testing the quality of shoe soles under applied pressure, characterized in that, Applied to a pressure-applying shoe sole quality testing device as described in any one of claims 1 to 9.