A method for testing multi-dimensional comprehensive performance of a leather shoe sole

Abstract

The application discloses a kind of leather shoes sole multidimensional comprehensive performance test method, belong to leather shoes performance detection technical field.The test is with main control unit as core coordination control, external integration gait simulation unit, scene simulation unit, performance test unit and collection analysis unit, wherein gait simulation unit includes the leather shoes foot mould of adaptation 38~44 code and MEMS pressure sensing unit, scene simulation unit includes the closed loop conveying belt of replaceable pavement module and the temperature and humidity cabin of temperature and humidity closed loop control, performance test unit integrates wear resistance, folding resistance, anti-skid, shock absorption test component, collection analysis unit includes multidimensional force sensor and high-speed camera;Test method is realized based on the test equipment, and detection is completed through sample pretreatment, installation parameter setting, multi-working-condition synchronous test and comprehensive performance evaluation.The application realizes the automatic detection of leather shoes sole multidimensional performance, structure is stable, detection is accurate, and is suitable for leather shoes sole, precision shoe material and other industrial detection fields.

Description

Technical Field

[0001] This application relates to the field of footwear quality testing technology, and in particular to a method for testing the multi-dimensional comprehensive performance of leather shoe soles. Background Technology

[0002] As a mainstream type of footwear for everyday wear, leather shoes have soles that are the core component in direct contact with the ground. The overall performance of the sole directly determines the safety, comfort, durability, and lifespan of the shoes, and is also directly related to the user experience and personal safety of consumers. Among these factors, abrasion resistance determines the lifespan of the sole; flexural strength affects comfort during wear and whether it is prone to cracking; slip resistance is directly related to walking safety; shock absorption can mitigate the damage to joints caused by the impact of the ground during walking; adhesive strength ensures that the sole does not separate from the upper and midsole; and anti-aging performance ensures that the sole does not become brittle or deformed after long-term use in different temperature and humidity environments. All of these properties together constitute the core comprehensive performance indicators of leather shoe soles.

[0003] With the rapid development of the footwear industry, the increasing demands of consumers for leather shoe quality, and the continuous improvement of footwear quality standards, higher requirements are being placed on the accuracy, efficiency, and comprehensiveness of testing the overall performance of leather shoe soles. However, existing leather shoe sole performance testing technologies and equipment still have many shortcomings and deficiencies, making it difficult to meet the needs of industry development and standard implementation. Most existing testing equipment is single-function, generally only compatible with one or a few standards, and cannot simultaneously meet multiple performance testing requirements. This leads to difficulties in interoperability of test data, hindering the international development of leather shoe products.

[0004] Therefore, developing a multi-dimensional comprehensive performance testing method for leather shoe soles that can achieve integrated testing of multiple performance characteristics, accurately simulate actual working conditions, and possess comprehensive quantitative evaluation capabilities has become an urgent technical problem to be solved in the field of quality inspection in the current footwear industry. Summary of the Invention

[0005] The purpose of this application is to provide a multi-dimensional comprehensive performance testing method for leather shoe soles, which solves the technical problem that existing testing equipment has only single functions and can only be adapted to a certain testing standard, and realizes comprehensive testing of leather shoe soles.

[0006] To achieve the above objectives, this application provides a method for multi-dimensional comprehensive performance testing of leather shoe soles, including a main control unit, a gait simulation unit, a scene simulation unit, a performance testing unit, and a data acquisition and analysis unit. The main control unit is electrically connected to the gait simulation unit, the scene simulation unit, the performance testing unit, and the data acquisition and analysis unit. The gait simulation unit includes a leather shoe foot model adapted to sizes 38-44, and the sole of the shoe integrates a MEMS pressure sensing unit. The scene simulation unit includes a closed-loop conveyor belt and a temperature and humidity chamber. The closed-loop conveyor belt is equipped with a replaceable surface module, and the conveyor belt speed is adjustable. The temperature and humidity chamber is equipped with closed-loop control for a temperature range of -20℃ to 70℃ and a humidity range of 30% to 95%RH. The performance testing unit integrates abrasion resistance testing components, flexural strength testing components, anti-slip testing components, and shock absorption testing components to simultaneously complete multi-dimensional performance testing of the sole. The data acquisition and analysis unit includes a multi-dimensional force sensor electrically connected to a high-speed camera, which is used to capture various data in real time during the testing process.

[0007] Furthermore, the main control unit adopts a combination structure of industrial PC and PLC to realize the setting of test parameters, real-time monitoring of the test process, early warning of abnormal situations, and storage and export of test data.

[0008] Furthermore, the pressure sensing unit installed on the sole of the shoe has a pressure acquisition resolution of 0.5mm, which is used to accurately acquire the pressure distribution in the heel, arch, and forefoot areas.

[0009] Furthermore, the replaceable road surface modules of the closed-loop conveyor belt include four types: ceramic tile, asphalt, marble, and slippery surface. The conveyor belt speed adjustment range is 0.1~5m / s, which is used to simulate the movement states corresponding to walking and running gaits.

[0010] Furthermore, in the performance testing unit: the abrasion resistance testing component includes a rotating friction roller, which is electrically connected to a thickness laser detector used to detect the loss of abrasion resistance during the abrasion process of the sole; the flexural resistance testing component includes a servo bending tester with a bending angle adjustment range of 0°~90° and a test cycle range of 0~100,000 times, used to detect cracks in the sole after repeated bending; the anti-slip testing component is a dynamic friction coefficient tester, used to detect the dynamic friction coefficient of the sole under different working conditions; and the shock absorption testing component includes a drop hammer impact tester and an acceleration sensor, used to detect the rebound ability of the sole.

[0011] Furthermore, based on the above performance testing method, the following steps are included: Step 1: Sample pretreatment. Clean the stains and grease from the soles of the leather shoes. Place the sole samples in an environment of 23℃±2℃ and 50%RH±10% for 24 hours to balance the moisture and internal stress of the samples. Step 2: Sample installation and parameter setting. Place the leather shoe into the shoe mold, making the sole parallel to the surface of the closed-loop conveyor belt. Set the initial pressure and set the various performance test parameters. Step 3: Multi-condition synchronous testing. The main control unit controls the gait simulation unit, scenario simulation unit and performance testing unit to work together to simultaneously complete the abrasion resistance, flexural resistance, anti-slip and shock absorption strength tests of the sole. The data acquisition and analysis unit collects various data such as pressure, friction, deformation and temperature in real time during the test process. Step 4: Comprehensive performance evaluation. The algorithm model integrates and analyzes the collected multi-source data, calculates the comprehensive performance score of the sole according to the preset index weights, classifies the performance level, and generates a performance evaluation report and optimization suggestions.

[0012] Furthermore, the initial pressure in step 2 is set to 500N to simulate the force on the sole of the shoe corresponding to the normal weight of an adult; the performance test parameters include gait parameters such as walking state (speed 1.2m / s, cadence 120 times / min) and running state (speed 3m / s, cadence 180 times / min); environmental parameters include normal temperature and humidity (23℃ / 50%RH), high temperature and high humidity (45℃ / 85%RH), low temperature (-10℃) and wet surface (0.5mm water film).

[0013] Furthermore, the standards for each performance test in step 3 are as follows: after 100,000 revolutions of abrasion resistance test, the mass loss is ≤0.5g, the thickness wear is ≤1mm, and there are no obvious visible cracks; after 60,000 cycles of flexural resistance test, the sole is undamaged and has no delamination; in the anti-slip test, the dry dynamic friction coefficient is ≥0.5 and the wet dynamic friction coefficient is ≥0.3, which meets the national standard GB / T 3903.6; in the shock absorption test, the sole rebound rate is ≥60%, the energy absorption is ≥30%, and there is no permanent deformation.

[0014] Furthermore, the indicators mentioned in step 4 are: abrasion resistance 25%, flexural resistance 20%, anti-slip performance 20%, and shock absorption performance 15%; the comprehensive performance rating is divided into: 90~100 points is excellent, 80~89 points is good, 70~79 points is qualified, and <70 points is unqualified.

[0015] Compared with the prior art, the technical solution provided in this application has the following beneficial effects: This application provides a multi-dimensional comprehensive performance testing method for leather shoe soles. By integrating multi-dimensional performance testing into one system, relying on leather shoe foot molds, replaceable road surface modules, and closed-loop temperature and humidity control, it accurately simulates actual wearing conditions. Combined with an intelligent main control unit, it achieves full automation of the testing process. At the same time, it establishes a scientific comprehensive evaluation system and adapts to multiple domestic and international testing standards, improving testing efficiency, reliability, and standardization of test results. It effectively solves the technical problems of existing sole testing equipment being scattered, distorted simulation of working conditions, and one-sided evaluation. Attached Figure Description

[0016] Figure 1 This is a flowchart of the multi-dimensional comprehensive performance testing method for leather shoe soles in this application; Figure 2 This is a schematic diagram showing the distribution of the MEMS pressure sensing unit on the sole of the leather shoe model and the foot in this application. The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0018] It should be noted that all directional indicators (such as up, down, left, right, front, and back) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0019] refer to Figure 1 , 2This embodiment provides a method for comprehensive multi-dimensional performance testing of leather shoe soles, including a main control unit, a gait simulation unit, a scene simulation unit, a performance testing unit, and a data acquisition and analysis unit. The main control unit is electrically connected to the gait simulation unit, the scene simulation unit, the performance testing unit, and the data acquisition and analysis unit. The gait simulation unit includes a leather shoe foot model adapted to sizes 38-44, and the sole of the shoe integrates a MEMS pressure sensing unit. The scene simulation unit includes a closed-loop conveyor belt and a temperature and humidity chamber. The closed-loop conveyor belt is equipped with a replaceable surface module, and the conveyor belt speed is adjustable. The temperature and humidity chamber is equipped with closed-loop control for a temperature range of -20℃ to 70℃ and a humidity range of 30% to 95%RH. The performance testing unit integrates abrasion resistance testing components, flexural strength testing components, anti-slip testing components, and shock absorption testing components to simultaneously complete multi-dimensional performance testing of the sole. The data acquisition and analysis unit includes a multi-dimensional force sensor electrically connected to a high-speed camera, which is used to capture various data in real time during the testing process.

[0020] In this embodiment, the main control unit, as the core control module of the entire test, is electrically connected to the gait simulation unit, scenario simulation unit, performance testing unit, and data acquisition and analysis unit via an industrial bus. It is responsible for receiving feedback signals from each unit and sending control commands to achieve automated control of the entire testing process. The core component of the gait simulation unit is a shoe mold. This mold is made of high-strength engineering plastic in one piece and is suitable for standard adult leather shoes (sizes 38-44). The sole contour of the mold is strictly designed according to ergonomics, conforming to the normal shape of an adult's foot. A MEMS pressure sensing unit is integrated into a pre-set mounting groove on the sole of the mold. The sensing unit is mounted as a patch, flush with the sole surface to avoid affecting test accuracy, and is used to collect the pressure distribution of different areas of the sole in real time during the test. The scenario simulation unit consists of a closed-loop conveyor belt and a temperature and humidity chamber, which are integrated and installed together. The closed-loop conveyor belt is horizontally fixed inside the temperature and humidity chamber and is made of wear-resistant rubber with a detachable road surface module on its surface. The temperature and humidity chamber adopts a sealed structure and is equipped with heating, cooling, humidification, and dehumidification devices. Through a closed-loop control system, it achieves precise temperature control from -20℃ to 70℃ and humidity control from 30% to 95%RH, simulating environmental conditions in different regions and seasons. The drive motor of the closed-loop conveyor belt uses frequency conversion control, which can adjust the running speed according to the testing requirements to meet the simulation needs of different states. The performance testing unit adopts an integrated design, integrating wear resistance testing components, flexural strength testing components, anti-slip testing components, and shock absorption testing components on the same mounting frame. Each component can operate independently without interference, enabling simultaneous multi-dimensional performance testing of the same shoe sole sample, reducing the number of sample changes and improving testing efficiency. The installation position of each component corresponds precisely to the shoe foot mold and the closed-loop conveyor belt, ensuring full contact between the shoe sole and each testing component during testing and guaranteeing the accuracy of the test data. The core component of the data acquisition and analysis unit is a multi-dimensional force sensor. This sensor is a six-dimensional force sensor, installed at the connection between the shoe mold and the drive mechanism. It is used to collect the longitudinal, lateral, and other forces acting on the sole during the test. The multi-dimensional force sensor is electrically connected to a high-speed camera via a data transmission line. The high-speed camera is fixed inside the temperature and humidity chamber, with its lens aimed at the sole test area. The frame rate is set to 1000 frames per second to capture various dynamic data such as deformation, friction, and cracks of the sole in real time during the test, and transmits them synchronously to the main control unit for processing.

[0021] As an optional implementation, the main control unit adopts a combination structure of industrial PC and PLC to realize the setting of test parameters, real-time monitoring of the test process, early warning of abnormal situations, and storage and export of test data.

[0022] In this embodiment, the industrial PC is a high-performance industrial-grade computer equipped with an Intel Core i7 processor, 16GB of memory, and a 1TB solid-state drive. It is equipped with dedicated test control software, which features a visual user interface that allows for manual setting and automatic saving of test parameters, and supports batch import and export of parameters. It also has real-time monitoring capabilities for the testing process, allowing users to intuitively view the operating status of each unit, test data curves, and abnormal situation warnings. Furthermore, the industrial PC has a built-in large-capacity storage module for long-term storage of test data, supporting export to formats such as Excel and PDF for convenient subsequent data traceability and analysis. The PLC selected is a Siemens S7-1200 series PLC, which serves as the lower-level machine responsible for receiving control commands sent by the industrial PC. It drives the actuators of the gait simulation unit, scene simulation unit, and performance testing unit to perform actions such as controlling the start and stop and speed adjustment of the closed-loop conveyor belt, the temperature and humidity control of the temperature and humidity chamber, and the operation and stop of each test component. At the same time, the PLC collects the operating status signals of each unit in real time (such as temperature and humidity, conveyor belt speed, and working status of test components) and feeds them back to the industrial PC. When an abnormal signal is detected (such as temperature and humidity exceeding the set range, sensor failure, or test component jamming), the PLC immediately sends a warning signal to the industrial PC. The industrial PC then simultaneously issues an audible and visual alarm and automatically stops the testing process to protect the equipment and sample safety.

[0023] As an optional implementation, the pressure sensing unit installed on the sole of the shoe has a pressure acquisition resolution of 0.5mm, which is used to accurately acquire the pressure distribution in the heel, arch, and forefoot areas.

[0024] In this embodiment, the sensor units are arranged strictly to correspond to the three key areas of the human foot: the heel area, the arch area, and the forefoot area. The heel and forefoot areas are the primary stress-bearing areas, with a sensor point density of 8 per square centimeter. The arch area is the secondary stress-bearing area, with a sensor point density of 4 per square centimeter. This ensures accurate collection of pressure distribution data in the three areas, providing data support for subsequent sole stress analysis and performance evaluation. The pressure data collected by the sensor units is transmitted to the acquisition and analysis unit in real time via a wireless transmission module, avoiding interference from wired transmission to gait simulation.

[0025] As an optional implementation, the replaceable road surface module of the closed-loop conveyor belt includes four types: ceramic tile, asphalt, marble, and slippery surface. The conveyor belt speed adjustment range is 0.1~5m / s, which is used to simulate the movement states corresponding to walking and running gaits.

[0026] In this embodiment, the replaceable surface modules of the closed-loop conveyor belt are configured in four types to simulate different daily walking scenarios. The ceramic tile module uses ordinary polished ceramic tiles with a smooth surface to simulate indoor ceramic tile floors; the asphalt module uses modified asphalt with a slightly rough texture to simulate outdoor asphalt roads; the marble module uses natural marble with a smooth and glossy surface to simulate marble floors in shopping malls, hotels, and other similar locations; and the wet surface module uses frosted glass with a surface that can be sprayed with a measured amount of water to simulate wet and slippery roads in rainy weather. The speed of the closed-loop conveyor belt is adjusted using variable frequency speed control technology, with an adjustment range of 0.1~5m / s, which can be precisely adjusted according to testing requirements. The speed of 0.1~2m / s is used to simulate adult walking gait, and the speed of 2~5m / s is used to simulate adult running gait. The conveyor belt runs in a closed loop, and the stability error during operation is ≤±0.05m / s to ensure the realism of the gait simulation. The width of the conveyor belt is 50cm and the length is 2m to meet the testing requirements of different sizes of leather shoes and to prevent the soles of the shoes from exceeding the conveyor belt range during testing.

[0027] As an optional implementation, the performance testing unit includes: an abrasion resistance testing component comprising a rotating friction roller electrically connected to a thickness laser detector used to detect abrasion loss during the abrasion process of the sole; a flexural resistance testing component comprising a servo bending tester with a bending angle adjustment range of 0° to 90° and a test cycle range of 0 to 100,000 cycles, used to detect cracks in the sole after repeated bending; a slip resistance testing component comprising a dynamic friction coefficient tester, used to detect the dynamic friction coefficient of the sole under different working conditions; and a shock absorption testing component comprising a drop hammer impact tester and an acceleration sensor, used to detect the rebound capability of the sole.

[0028] In this embodiment, the core component of the abrasion resistance testing assembly is a rotating friction roller. The friction roller is made of high-hardness abrasion-resistant rubber, and its rotation speed is adjustable from 0 to 1000 rpm. The thickness laser detector uses a high-precision laser displacement sensor with a measurement accuracy of ±0.01mm, which is installed above the friction roller. The lens is aimed at the contact area between the sole and the friction roller to detect the thickness change of the sole in real time during the abrasion resistance test and calculate the thickness loss. At the same time, it works in conjunction with a mass sensor (accuracy ±0.001g) to detect the mass loss of the sole in real time, ensuring the accuracy of the abrasion resistance test data. The core component of the flexural durability testing kit is a servo bending machine. This machine utilizes a dual-axis drive structure to achieve reciprocating bending of the sole. The bending angle is adjustable from 0° to 90° with an accuracy of ±1°, and the number of tests ranges from 0 to 100,000, with the specific number of bends adjustable according to testing needs. The bending machine's clamps are made of flexible material to prevent damage to the sole during clamping and are adaptable to different sizes and shapes of soles. During testing, a high-speed camera captures the cracking of the sole's bending area in real time. When a crack is detected, the number of bends is automatically recorded, providing a basis for evaluating flexural durability. The anti-slip testing kit uses a dynamic friction coefficient tester. The test head of the tester contacts the sole using a standard rubber block with adjustable contact pressure. During testing, a closed-loop conveyor belt drives the sole's movement, and the tester detects the dynamic friction coefficient between the sole and different road surface modules in real time with an accuracy of ±0.01. It can simultaneously record friction coefficient data at different speeds and under different environments, directly reflecting the anti-slip performance of the sole. The shock absorption testing component consists of a drop hammer impact tester and an accelerometer. The drop hammer impact tester has an adjustable drop weight (range 0.5~5kg) and an adjustable drop height (range 10~50cm) to simulate the impact force on the sole of the shoe when the human body is walking or running. The accelerometer is installed inside the shoe foot mold, with a measurement range of 0~100g and a response time ≤1ms. It collects the acceleration change of the sole after being impacted in real time, calculates the rebound ability and energy absorption efficiency of the sole, and evaluates the shock absorption performance of the sole.

[0029] A method for testing the comprehensive performance of leather shoe soles in multiple dimensions includes the following steps: Step 1: Sample pretreatment. Clean the stains and grease from the soles of the leather shoes. Place the sole samples in an environment of 23℃±2℃ and 50%RH±10% for 24 hours to balance the moisture and internal stress of the samples. Step 2: Sample installation and parameter setting. Place the leather shoe into the shoe mold, making the sole parallel to the surface of the closed-loop conveyor belt. Set the initial pressure and set the various performance test parameters. Step 3: Multi-condition synchronous testing. The main control unit controls the gait simulation unit, scenario simulation unit and performance testing unit to work together to simultaneously complete the abrasion resistance, flexural resistance, anti-slip and shock absorption strength tests of the sole. The data acquisition and analysis unit collects various data such as pressure, friction, deformation and temperature in real time during the test process. Step 4: Comprehensive performance evaluation. The algorithm model integrates and analyzes the collected multi-source data, calculates the comprehensive performance score of the sole according to the preset index weights, classifies the performance level, and generates a performance evaluation report and optimization suggestions.

[0030] In this embodiment, step 1 involves selecting shoe sole samples within the size range of 38 to 44 (the specific size can be selected according to actual testing needs). First, a lint-free cloth soaked in anhydrous ethanol is used to gently wipe away stains, grease, and dust from the surface of the sole to ensure that the sole surface is clean and free of debris, thus avoiding stains from affecting the test accuracy. After wiping, the sole samples are placed in a constant temperature and humidity chamber with environmental parameters set at 23℃±2℃ and 50%RH±10%, and left to stand for 24 hours to allow the moisture and internal stress of the samples to reach equilibrium, thus avoiding deviations in performance test data due to environmental differences. Step 2: Fit the pre-treated leather shoe sample into a shoe foot mold of the appropriate size, adjust the position of the shoe to ensure that the sole is parallel to the surface of the closed-loop conveyor belt, and that each area of ​​the sole fits tightly to the foot mold without looseness or displacement; set the initial pressure through the industrial PC of the main control unit so that the pressure applied by the foot mold to the sole meets the test requirements; at the same time, set various performance test parameters, gait parameters, and environmental parameters in the control software of the industrial PC. After the parameters are set, click "Start Test", and the main control unit will automatically synchronize each parameter to the corresponding unit, completing the preparation work before the test. Step 3: The main control unit sends control commands to control the gait simulation unit, scene simulation unit, and performance testing unit to work together: the gait simulation unit drives the shoe model to move according to the set gait parameters, the scene simulation unit adjusts to the set temperature and humidity environment, the closed-loop conveyor belt runs at the set speed and switches the corresponding road surface module, and the components of the performance testing unit start synchronously to test the abrasion resistance, flexural strength, anti-slip properties, and shock absorption strength of the shoe sole; during the test, the multi-dimensional force sensor and high-speed camera of the data acquisition and analysis unit collect various data such as pressure, friction, deformation, temperature, and acceleration in real time, and transmit them synchronously to the main control unit. The industrial PC displays the data curves in real time and records each set of data during the test to ensure the integrity of the data. After the test in step 4 is completed, the main control unit automatically stops the operation of each unit. The data acquisition and analysis unit transmits the collected multi-source data to the data analysis module of the industrial PC. The multi-source data is fused and analyzed using a preset algorithm model, abnormal data is removed, and valid data is retained. According to the preset index weights, the wear resistance, flexural resistance, slip resistance, shock absorption and other performance of the sole are scored, and the comprehensive performance score of the sole is calculated. The performance level is divided according to the score. Finally, the system automatically generates a detailed performance evaluation report, which includes test parameters, test data, performance score, performance level, and optimization suggestions for the shortcomings of sole performance, for the reference of testers.

[0031] As an optional implementation, the performance test parameters include gait parameters such as walking (speed 1.2m / s, cadence 120 times / min) and running (speed 3m / s, cadence 180 times / min); and environmental parameters such as normal temperature and humidity (23℃ / 50%RH), high temperature and high humidity (45℃ / 85%RH), low temperature (-10℃) and wet surface (0.5mm water film).

[0032] In this embodiment, the initial pressure in step 2 is set to 500N. This pressure value simulates the average pressure on the sole of a shoe when an adult (weighing approximately 50kg) stands and walks normally, which is consistent with daily use scenarios and ensures that the test results are close to actual usage needs. The initial pressure is precisely controlled by the pressure adjustment module of the main control unit, with an error of ≤±5N, to avoid pressure deviation affecting the test data. Gait parameter settings are divided into two states: walking and running. In the walking state, the closed-loop conveyor belt speed is set to 1.2m / s, the step frequency is set to 120 times / min, and the stride length is set to 0.7m, simulating the normal walking gait of an adult. In the running state, the closed-loop conveyor belt speed is set to 3m / s, the step frequency is set to 180 times / min, and the stride length is set to 1.2m, simulating the normal running gait of an adult. The two gait states can be switched according to test requirements, or they can be compared and tested simultaneously. Four environmental parameters are set to cover common daily environments: normal temperature and humidity (23℃, 50%RH) simulates a normal indoor temperature environment; high temperature and high humidity (45℃, 85%RH) simulates a hot and rainy summer environment; low temperature (-10℃, 50%RH) simulates a low winter environment; and wet surface (23℃, 50%RH) uses a wet surface module installed on the closed-loop conveyor belt with a 0.5mm thick water film sprayed on the surface to simulate a wet and slippery rainy environment. The four conditions can be tested individually or switched sequentially for continuous testing of multiple conditions.

[0033] As an optional implementation method, the standards for each performance test in step 3 are as follows: after 100,000 revolutions of abrasion resistance test, the mass loss is ≤0.5g, the thickness wear is ≤1mm and there are no obvious visible cracks; after 60,000 cycles of flexural resistance test, the sole is undamaged and delaminated; in the anti-slip test, the dry dynamic friction coefficient is ≥0.5 and the wet dynamic friction coefficient is ≥0.3, which meets the national standard GB / T 3903.6; in the shock absorption test, the sole rebound rate is ≥60%, the energy absorption is ≥30% and there is no permanent deformation.

[0034] In this embodiment, the abrasion resistance test is set to 100,000 revolutions. After the test, the mass loss of the sole is detected by a mass sensor, and the thickness wear of the sole is detected by a thickness laser detector. Simultaneously, the appearance of the sole is observed. The passing criteria are: mass loss ≤ 0.5g, thickness wear ≤ 1mm, and no obvious visible cracks, delamination, or damage on the sole surface. If any of these criteria are not met, the abrasion resistance is deemed unqualified. The flexural resistance test is set to 60,000 cycles. After the test, images captured by a high-speed camera and visual observation are used to determine the passing criteria: no damage, delamination, or obvious cracks on the sole (crack length ≤ 0.5mm is considered qualified). If damage, delamination, or crack length > 0.5mm occurs, the flexural resistance is deemed unqualified. During the testing process, the dynamic friction coefficient tester continuously monitors the dynamic friction coefficient of the shoe sole under different working conditions. The passing standard is a dynamic friction coefficient ≥ 0.5 under dry conditions (normal temperature and humidity, high temperature and high humidity, and low temperature) and a dynamic friction coefficient ≥ 0.3 under wet conditions (slippery surface). This standard meets the requirements of the national standard GB / T 3903.6 "Test Methods for Shoes - Anti-slip Performance". If the friction coefficient under any working condition does not meet the requirements, the anti-slip performance is deemed unqualified. The shock absorption performance of the shoe sole is tested using a drop weight impact tester and an acceleration sensor. The passing standard is: sole rebound rate ≥ 60%, energy absorption ≥ 30%, and no permanent deformation of the sole after testing (deformation ≤ 0.1 mm). If any of these conditions are not met, the shock absorption performance is deemed unqualified.

[0035] As an optional implementation, the indicators in step 4 are: abrasion resistance 25%, flexural resistance 20%, anti-slip performance 20%, and shock absorption performance 15%; the comprehensive performance rating is divided into: 90~100 points is excellent, 80~89 points is good, 70~79 points is qualified, and <70 points is unqualified.

[0036] In this embodiment, the weight allocation of each indicator in the comprehensive performance evaluation is as follows: based on the actual use needs of the sole, key performance is highlighted, with abrasion resistance accounting for 25%, flexural resistance accounting for 20%, anti-slip performance accounting for 20%, shock absorption performance accounting for 15%, and the remaining 20% ​​for comprehensive adaptability (including pressure distribution uniformity, environmental adaptability, etc.). Each indicator is scored independently, and the total score is 100 points. Based on the total score of various indicators, the overall performance of the sole is divided into four levels: Excellent (90-100 points), all performance indicators meet the test standards, and key performance indicators (wear resistance, slip resistance) are outstanding, suitable for high-frequency daily use; Good (80-89 points), all performance indicators meet the test standards, with no unqualified items, and some performance indicators can be further optimized; Pass (70-79 points), core performance indicators (wear resistance, flexural resistance, slip resistance) meet the test standards, and some non-core performance indicators (such as shock absorption) are close to the pass line, basically meeting the needs of daily use; Unqualified (<70 points), at least one core performance indicator fails to meet the test standards, cannot meet the needs of daily use, and the sole material or structure needs to be optimized and improved. The overall performance score = wear resistance score × 25% + flexural resistance score × 20% + slip resistance score × 20% + shock absorption score × 15% + overall adaptability score × 20%; the score for each performance indicator is determined based on the degree of conformity between the test data and the standard, with a maximum score of 100 points for each.

[0037] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A method for testing the comprehensive performance of leather shoe soles in multiple dimensions, characterized in that, It includes a main control unit, a gait simulation unit, a scene simulation unit, a performance testing unit, and a data acquisition and analysis unit; the main control unit is electrically connected to the gait simulation unit, the scene simulation unit, the performance testing unit, and the data acquisition and analysis unit, respectively. The gait simulation unit includes a leather shoe foot model, which is compatible with leather shoes of size 38-44, and the sole of the leather shoe integrates a MEMS pressure sensing unit. The scenario simulation unit includes a closed-loop conveyor belt and a temperature and humidity chamber. The closed-loop conveyor belt is equipped with a replaceable road surface module and the conveyor belt speed is adjustable. The temperature and humidity chamber is equipped with closed-loop control with a temperature range of -20℃ to 70℃ and a humidity range of 30% to 95%RH. The performance testing unit is equipped with abrasion resistance testing components, flexural resistance testing components, anti-slip testing components, and shock absorption testing components, which are used to simultaneously complete multi-dimensional performance tests of the shoe sole. The acquisition and analysis unit includes a multi-dimensional force sensor, which is electrically connected to a high-speed camera. The high-speed camera is used to capture various types of data in real time during the testing process.

2. The method for testing the multi-dimensional comprehensive performance of leather shoe soles according to claim 1, characterized in that, The main control unit adopts a combination structure of industrial PC and PLC to realize the setting of test parameters, real-time monitoring of the test process, early warning of abnormal situations, and storage and export of test data.

3. The method for testing the multi-dimensional comprehensive performance of leather shoe soles according to claim 1, characterized in that, The pressure sensing unit installed on the sole of the shoe has a pressure acquisition resolution of 0.5mm, which is used to accurately collect the pressure distribution in the heel, arch, and forefoot areas.

4. The method for testing the multi-dimensional comprehensive performance of leather shoe soles according to claim 1, characterized in that, The closed-loop conveyor belt has four types of replaceable road surface modules: ceramic tile, asphalt, marble, and slippery surface. The conveyor belt speed adjustment range is 0.1~5m / s, which is used to simulate the movement states corresponding to walking and running gaits.

5. The method for testing the multi-dimensional comprehensive performance of leather shoe soles according to claim 1, characterized in that, In the performance testing unit: The abrasion resistance testing assembly includes a rotating friction roller, which is electrically connected to a thickness laser detector used to detect the loss during the abrasion resistance process of the shoe sole; The flexural endurance testing component includes a servo bending instrument with a bending angle adjustment range of 0° to 90° and a test cycle range of 0 to 100,000 times, used to detect cracks in the sole after repeated bending. The anti-slip testing component is a dynamic friction coefficient tester, used to test the dynamic friction coefficient of the shoe sole under different working conditions; The shock absorption testing components include a drop weight impact meter and an accelerometer, used to detect the rebound ability of the shoe sole.

6. A method for testing the comprehensive performance of leather shoe soles, characterized in that, Based on the steps described in claim 1: Step 1: Sample pretreatment. Clean the stains and grease from the soles of the leather shoes. Place the sole samples in an environment of 23℃±2℃ and 50%RH±10% for 24 hours to balance the moisture and internal stress of the samples. Step 2: Sample installation and parameter setting. Place the leather shoe into the shoe mold, making the sole parallel to the surface of the closed-loop conveyor belt. Set the initial pressure and set the various performance test parameters. Step 3: Multi-condition synchronous testing. The main control unit controls the gait simulation unit, scenario simulation unit and performance testing unit to work together to simultaneously complete the abrasion resistance, flexural resistance, anti-slip and shock absorption strength tests of the sole. The data acquisition and analysis unit collects various data such as pressure, friction, deformation and temperature in real time during the test process. Step 4: Comprehensive performance evaluation. The algorithm model integrates and analyzes the collected multi-source data, calculates the comprehensive performance score of the sole according to the preset index weights, classifies the performance level, and generates a performance evaluation report and optimization suggestions.

7. The method for testing the comprehensive performance of leather shoe soles according to claim 6, characterized in that, The initial pressure in step 2 is set to 500N to simulate the force on the sole of the shoe corresponding to the normal weight of an adult. The performance test parameters include gait parameters such as walking (speed 1.2m / s, cadence 120 times / min) and running (speed 3m / s, cadence 180 times / min); environmental parameters such as normal temperature and humidity (23℃ / 50%RH), high temperature and high humidity (45℃ / 85%RH), low temperature (-10℃) and wet surface (0.5mm water film).

8. The method for testing the comprehensive performance of leather shoe soles according to claim 6, characterized in that, The standards for each performance test in step 3 are as follows: After 100,000 revolutions of abrasion resistance test, the mass loss is ≤0.5g, the thickness wear is ≤1mm, and there are no obvious visible cracks; after 60,000 cycles of flexural resistance test, the sole is undamaged and has no delamination; in the anti-slip test, the dry dynamic friction coefficient is ≥0.5 and the wet dynamic friction coefficient is ≥0.3, which meets the national standard GB / T 3903.6; in the shock absorption test, the sole rebound rate is ≥60%, the energy absorption is ≥30%, and there is no permanent deformation.

9. The method for testing the comprehensive performance of leather shoe soles according to claim 6, characterized in that, The indicators mentioned in step 4 are: abrasion resistance 25%, flexural strength 20%, anti-slip performance 20%, and shock absorption performance 15%; the comprehensive performance rating is divided into: 90~100 points is excellent, 80~89 points is good, 70~79 points is qualified, and <70 points is unqualified.

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