A horizontal pulling speed calibration device for a shoe anti-slip performance testing machine

Abstract

The invention discloses a horizontal pulling speed calibration device for a footwear anti-skid performance testing machine in the technical field of footwear static anti-skid performance testing machines, comprising a split sensor, comprising a sensing sleeve and a displacement rod, wherein the displacement rod is inserted into the sensing sleeve without contact, the sensing sleeve is stably arranged horizontally on a lifting bracket, the displacement rod is horizontally locked and installed on the outside of a sole clamp, the displacement rod is slidably arranged in the sleeve along a horizontal direction, the axes of the sensing sleeve and the displacement rod coincide with the horizontal sliding path of the sole clamp on the same horizontal plane, the horizontal speed of the testing machine can be measured non-contactly in the measuring device throughout the process, the movement distance and duration of the sole clamp are measured by a more accurate split sensor, the data is managed in real time, and the experiment is more accurate.

Description

Technical Field

[0001] The invention relates to the technical field of static anti-skid performance testing machines for footwear, in particular to a horizontal pulling speed calibration device for a static anti-skid performance testing machine for footwear. Background Art

[0002] The static anti-skid performance tester for footwear is an instrument used to measure the static anti-skid performance of footwear outsoles, heels or related outsole materials. It is used to determine the static friction coefficient of footwear outsoles, heels or related outsole materials under specified loads and horizontal pulling speeds. The static anti-skid performance tester for footwear is widely used in industry laboratories such as testing institutions and production enterprises for footwear outsoles, heels or related outsole materials. There are a large number of static anti-skid performance testers in use. The static anti-skid performance tester for footwear is widely used in the testing of footwear outsoles, heels or related outsole materials in footwear production enterprises and scientific research institutes.

[0003] The static anti-slip performance tester for footwear mainly consists of five parts: control panel (including display), pull rod (including force sensor), sample fixture, friction panel and base (such as Figure 1 During the test, the specified sample is placed horizontally on the friction panel required by the standard, with the test surface of the sample facing downward. A certain load is applied, and the sample is pulled horizontally at a certain speed to measure its maximum pulling force and calculate the static friction coefficient to measure the static anti-slip performance of the sample.

[0004] The horizontal pulling speed is the main technical parameter of the static anti-slip performance tester for footwear. The accuracy of the horizontal pulling speed directly affects the physical properties of the footwear material, and further affects the footwear quality, user experience and corporate benefits. In order to ensure the accuracy of the horizontal pulling speed of the static anti-slip performance tester for footwear, it is necessary to measure the horizontal pulling speed of the static anti-slip performance tester for footwear.

[0005] Based on this, the present invention designs a horizontal pulling speed calibration device for a footwear anti-slip performance testing machine to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to provide a horizontal pulling speed calibration device for a shoe anti-slip performance testing machine, which can realize non-contact measurement of the horizontal speed of the testing machine in the measuring device throughout the entire process, and measure the movement distance and duration of the sole clamp through a more accurate split sensor, and manage the data in real time, making the experiment more accurate.

[0007] The present invention is implemented as follows: a horizontal pulling speed calibration device for a footwear anti-slip performance testing machine, comprising:

[0008] The footwear anti-slip performance tester comprises a tester base, a machine body controller, a pulling rod, a sole clamp and a friction panel, wherein the pulling rod is connected between the machine body controller and the sole clamp, the friction panel is horizontally fixed on the tester base, and the sole clamp is horizontally slidably arranged on the friction panel;

[0009] Characterized in that the speed calibration device comprises:

[0010] The split sensor comprises a sensing sleeve and a displacement rod, wherein the displacement rod is inserted into the sensing sleeve without contact.

[0011] The sensing sleeve is stably placed horizontally on the lifting bracket, the displacement rod is locked horizontally on the outside of the sole clamp, the displacement rod is slidably arranged in the sensing sleeve along the horizontal direction, and the axes of the sensing sleeve and the displacement rod coincide with the horizontal sliding path of the sole clamp on the same horizontal plane;

[0012] A data processor is provided with a display screen, the data processor is data-connected to the display screen, and the data processor is also data-connected to the split sensor.

[0013] Furthermore, the data processor and the display screen are electrically connected to an external power supply.

[0014] Furthermore, the induction sleeve is a hollow cylinder of the inductor, and the displacement rod is an induction iron core.

[0015] Furthermore, the lifting bracket is a lifting tripod, and the split sensor is locked on the top of the lifting bracket by bolts.

[0016] Furthermore, the horizontal axes of the sensing sleeve and the displacement rod are in the same straight line.

[0017] The beneficial effects of the present invention are as follows: 1. The present invention is based on a split sensor, and through the structural design of the measuring device, the measuring device can achieve full-process non-contact measurement of the horizontal speed of the testing machine, avoiding mutual interference between the testing machine and the monitoring device. The measuring environment of the device is more concise and does not affect each other. The static anti-slip performance testing machine for footwear is not affected by the speed calibration device, and the speed calibration device will not affect the normal test state of the static anti-slip performance testing machine for footwear;

[0018] 2. Through the measurement of the displacement rod and the induction sleeve of the split sensor, each displacement data is accurately recorded. The data processor uses a high-precision resonator to ensure the accuracy of the motion state timing. Through real-time measurement of the horizontal displacement and horizontal pulling time of the test machine pulling rod, and real-time data processing, the real-time measurement of the horizontal pulling speed of the test machine is realized. In addition, a stopwatch is no longer used for measurement, but accurate time point recording is used to ensure time accuracy, thereby making the speed measurement more accurate;

[0019] 3. This device does not measure the average speed over a long distance, but the instantaneous speed of the pulling rod at each time point. It can also accurately record the instantaneous speeds of multiple different displacements, so that the device can obtain more accurate data waveforms and perform more effective speed data analysis on the static anti-slip performance tester for footwear. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below in conjunction with embodiments with reference to the accompanying drawings.

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the principle of the present invention;

[0023] Figure 3 It is a schematic diagram of the split sensor of the present invention.

[0024] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0025] 1-testing machine base, 11-machine body controller, 12-pull rod, 13-shoe sole clamp, 14-friction panel, 2-split sensor, 21-sensing sleeve, 22-displacement rod, 3-data processor, 31-display screen, 4-lifting bracket. DETAILED DESCRIPTION

[0026] See also Figures 1 to 3 As shown, the present invention provides a technical solution: a horizontal pulling speed calibration device for a footwear anti-slip performance testing machine, comprising:

[0027] The footwear anti-slip performance tester comprises a tester base 1, a machine controller 11, a pull rod 12, a sole fixture 13 and a friction panel 14, wherein the pull rod 12 is connected between the machine controller 11 and the sole fixture 13, the friction panel 14 is horizontally fixed on the tester base 1, and the sole fixture 13 is horizontally slidably arranged on the friction panel 14;

[0028] The speed calibration device includes:

[0029] The split sensor 2 includes a sensing sleeve 21 and a displacement rod 22. The displacement rod 22 is inserted into the sensing sleeve 21 without contact.

[0030] The sensing sleeve 21 is horizontally and stably placed on the lifting bracket 4, the displacement rod 22 is horizontally locked and installed on the outside of the sole clamp 13, and the displacement rod 22 is horizontally slidable in the sensing sleeve 21, and the axes of the sensing sleeve 21 and the displacement rod 22 coincide with the horizontal sliding path of the sole clamp 13 on the same horizontal plane;

[0031] The data processor 3 is provided with a display screen 31, and the data processor 3 is data-connected to the display screen 31. The data processor 3 is also data-connected to the split sensor 2, so that the measuring device can realize non-contact measurement of the horizontal speed of the testing machine throughout the whole process, and the movement distance and duration of the sole clamp can be measured through a more accurate split sensor, so that the data can be managed in real time and the experiment can be more accurate.

[0032] Wherein, the data processor 3 and the display screen 31 are electrically connected to an external power source, and are powered externally;

[0033] The induction sleeve 21 is a hollow cylinder of the inductor, and the displacement rod 22 is an induction iron core, which can accurately measure displacement with high speed and accuracy;

[0034] The lifting bracket 4 is a lifting tripod, and the split sensor 2 is locked on the top of the lifting bracket 4 by bolts, which is convenient for measuring the anti-slip performance test machine of footwear at different heights;

[0035] The horizontal axes of the sensing sleeve 21 and the displacement rod 22 are in the same straight line, which facilitates the speed measurement operation of the sole clamp 13 without affecting each other, and can accurately measure the displacement data without force interference;

[0036] A crystal resonator is also provided in the data processor 3 to facilitate setting and recording of time and sampling period, thereby improving the flexibility of timing and enabling accurate timing.

[0037] In a specific embodiment of the present invention:

[0038] There are three existing methods for measuring the horizontal pulling speed of a static anti-slip performance tester for footwear: Method 1: Mark the starting and ending positions during the horizontal pulling of the sample, use a displacement measuring instrument to measure the displacement of the starting and ending positions, and use a stopwatch or other timing measuring instrument to record the starting and ending times, and calculate the average speed v of the horizontal pulling of the sample; Method 2: Connect a displacement measuring instrument such as a pull-rope displacement sensor to the pulling rod 12, and during the test of the test machine, drive the measuring end of the displacement measuring instrument to move together through the pulling rod 12 to achieve real-time measurement of the displacement, and use a stopwatch or other timing measuring instrument to record the time, and calculate the average speed of the horizontal pulling of the sample; The third method is: connect a tachometer with a roller to the pull rod of the test machine through the roller groove, and during the test of the test machine, drive the roller to rotate together through the pulling rod, and calculate through the linear speed of the roller to achieve real-time measurement of the horizontal pulling speed of the test machine;

[0039] The embodiment of the present invention provides a horizontal pulling speed calibration device for a shoe anti-slip performance testing machine. The technical problem encountered by the present invention is:

[0040] 1. In the first method, the measurement method used is an indirect measurement method. In terms of displacement and time measurement, human factors have a great influence, data is difficult to control, the workload of data processing is large, the accuracy is low, and the efficiency is low; 2. In the second method, the measured horizontal pulling speed is the average speed within a whole displacement range, which cannot truly reflect the real-time speed fluctuation during the test of the testing machine, and it is impossible to measure multiple instantaneous speeds during the test of the testing machine; 3. In the third method, the roller and the pull rod are connected by rolling contact, and relative sliding may occur between the two, thereby affecting the horizontal pulling speed Measurement accuracy; 4. In the second method and the third method, the connection between the displacement measuring instrument such as the pull-rod displacement sensor or the tachometer with a roller and the pull rod is a contact connection, which is to link the timing device with the tension rod 12 or the sole clamp 13. Such a structure will produce a force on the pull rod and thus affect the magnitude of the horizontal tension, which is not conducive to the control of the horizontal tension, and thus affects the test results of the static anti-slip performance of the footwear. In addition, under this measurement method, the test state of the testing machine is inconsistent with the actual use state, and the timing device will also be affected by the static anti-slip performance testing machine of the footwear, and the timing will also have errors.

[0041] The technical effects achieved are as follows: 1. The present invention is based on the split sensor 2. Through the structural design of the measuring device, the measuring device can achieve full-process non-contact measurement of the horizontal speed of the testing machine, avoiding mutual interference between the testing machine and the monitoring device. The measuring environment of the device is more concise and does not affect each other. The static anti-skid performance testing machine for footwear is not affected by the speed calibration device, and the speed calibration device will not affect the normal test state of the static anti-skid performance testing machine for footwear, ensuring that the speed of the static anti-skid performance testing machine for footwear is detected in the original operating state;

[0042] 2. Through the cooperation between the sensing sleeve 21 and the displacement rod 22 of the split sensor 2, the displacement distance can be accurately monitored when displacement occurs, so that each displacement has an accurate displacement record, which can ensure the accuracy of the motion state timing, and perform multi-frequency real-time measurement, calculate the instantaneous speed, and perform waveform recording and analysis on the speeds of different displacements. By measuring the horizontal displacement and horizontal pulling time of the testing machine pulling rod 12 in real time, and performing real-time data processing to achieve real-time measurement of the horizontal pulling speed of the testing machine, a stopwatch is no longer used for measurement, but precise time point recording is used to ensure time accuracy, thereby making the speed measurement more accurate.

[0043] The technical solution in the embodiment of the present invention is to solve the above problems, and the overall idea is as follows:

[0044] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0045] When the present invention is manufactured, a conventional static anti-slip performance tester for footwear is first used as the device to be tested, and the device is docked with the device to be tested;

[0046] A displacement rod 22 is fixedly installed at the outer end of the sole fixture 13 of the static anti-slip performance tester for footwear. The displacement rod 22 is the end of the split sensor 2 that will be displaced. It is a common device and can be purchased externally. In this embodiment, a split LVDT displacement sensor of the DUG20 series is selected;

[0047] The outer end of the sole fixture 13 is Figure 1 On the right side of the shoe sole fixture 13, a displacement rod 22 is screwed horizontally on the outer side of the shoe sole fixture 13, such as Figure 3 The connecting end of the displacement rod 22 and the sole clamp 13 is provided with a thread for installation and docking, ensuring that the displacement rod 22 is horizontal and coaxial with the sensing sleeve 21, and the axis of the displacement rod 22 and the sensing sleeve 21 is also the same as the travel direction of the sole clamp 13. Figure 1 The middle part is the horizontal pulling and smooth movement of the pull rod 12 in the left and right directions;

[0048] Then, a lifting bracket 4 is set up outside the testing machine base 1. The lifting bracket 4 is a conventional tripod, which can be lifted and lowered and positioned at any height, and is stably supported by a triangular bracket. A split sensor 2 is installed on the top of the lifting bracket 4. The split sensor 2 needs to be adjusted to the same horizontal plane at the same height as the sole clamp 13 through the lifting bracket 4. On the split sensor 2, when displacement occurs at both ends of the two split sensors, the measurement has the advantages of high reliability, fast response speed, high measurement accuracy, high sensitivity, etc., which can provide guarantee for the accurate measurement of horizontal displacement.

[0049] Then the data processor 3 is installed. The data processor 3 adopts a device of model STM32F103C8T6 and is connected to the display screen 31. A switching power supply and a high-precision crystal resonator of a quartz crystal are also installed inside. The crystal resonator frequency is 22.1184MHz, which is used to process data and record time frequency.

[0050] The data processor 3 is data-connected to the split sensor 2 and the display screen 31 .

[0051] When the present invention is used, a conventional static anti-slip performance tester for footwear is first used as the device to be tested, and the device is docked with the device to be tested;

[0052] A displacement rod 22 is fixedly installed at the outer end of the sole fixture 13 of the static anti-slip performance tester for footwear. The displacement rod 22 is the end of the split sensor 2 that will be displaced. It is a common device and can be purchased externally. In this embodiment, a split LVDT displacement sensor of the DUG20 series is selected;

[0053] The outer end of the sole fixture 13 is Figure 1 On the right side of the shoe sole fixture 13, a displacement rod 22 is screwed horizontally on the outer side of the shoe sole fixture 13, such as Figure 3 The connecting end of the displacement rod 22 and the sole clamp 13 is provided with a thread for installation and docking, ensuring that the displacement rod 22 is horizontal and coaxial with the sensing sleeve 21, and the axis of the displacement rod 22 and the sensing sleeve 21 is also the same as the travel direction of the sole clamp 13. Figure 1 The middle part is the horizontal pulling and smooth movement of the pull rod 12 in the left and right directions;

[0054] Then, a lifting bracket 4 is set up outside the testing machine base 1. The lifting bracket 4 is a conventional tripod, which can be lifted and lowered and positioned at any height, and is stably supported by a triangular bracket. A split sensor 2 is installed on the top of the lifting bracket 4. The split sensor 2 needs to be adjusted to the same horizontal plane at the same height as the sole clamp 13 through the lifting bracket 4. On the split sensor 2, when displacement occurs at both ends of the two split sensors, the measurement has the advantages of high reliability, fast response speed, high measurement accuracy, high sensitivity, etc., which can provide guarantee for the accurate measurement of horizontal displacement.

[0055] Then the data processor 3 is installed. The data processor 3 adopts a device of model STM32F103C8T6 and is connected to the display screen 31. A switching power supply and a high-precision crystal resonator of a quartz crystal are also installed inside. The crystal resonator frequency is 22.1184MHz, which is used to process data and record time frequency.

[0056] The data processor 3 is data-connected to the split sensor 2 and the display screen 31 .

[0057] When the present invention is used, the split sensor 2 is first started, at which time the sensing sleeve 21 and the displacement rod 22 start to work, the sensing sleeve 21 records the real-time position of the displacement rod 22 and stores it as information, and then the data processor 3 is turned on. While the data processor 3 records the time of the crystal resonator, it also records the displacement data measured by the split sensor 2. After recording once, the data processor 3 sends instructions again based on the sampling period, and records the instantaneous time of the crystal resonator for the second time, and also records the displacement relationship between the sensing sleeve 21 and the displacement rod 22. The time difference can be obtained through the two time differences recorded by the crystal resonator, and the displacement difference can be obtained through the two displacement relationships between the sensing sleeve 21 and the displacement rod 22, so that the speed between the two data records of the data processor 3 can be obtained;

[0058] The average v of a sampling cycle of the footwear static anti-slip performance tester is obtained in some ways: the data processor 3 records the initial displacement of the crystal resonator and the split sensor 2 as t1 and s1 for the first time, and records the second time as t2 and s2, then the speed v of a sampling cycle is obtained = (s2-s1) / (t2-t1)

[0059] The shorter the time difference recorded by the data processor 3, that is, the shorter the sampling period, the closer the obtained speed is to the instantaneous speed. The more real-time data measured by the data processor 3, the higher the measurement accuracy. Therefore, the speed waveform that can be obtained is more coherent, and thus accurately obtained. The speed can also be measured according to actual conditions. When the body controller 11 is not working, the sole clamp 13 will not be pulled by the pulling rod 12, the sole clamp 13 and the displacement rod 22 remain stationary, the displacement remains unchanged, and the speed is considered to be 0.

[0060] The device has accurate measurement, and the sampling period can be adjusted at will according to actual needs. In addition, the data calculation of the device does not use a stopwatch, but uses a high-precision crystal resonator for recording, so that the time difference can be calculated more accurately, and manual measurement is no longer required, nor is it required to be pulled through the body controller 11. The device records more accurately, and the distance detection is not measured using a ruler or a rotating circumference, but is measured using a direct high-precision split sensor 2. The measurement data is accurate. The split sensor 2 is linked with the crystal resonator under the control of the data processor 3, and displacement measurement is performed according to the time frequency of the crystal resonator. It can measure at a higher frequency, with high efficiency and high accuracy. Moreover, the measuring device does not contact the entire static anti-slip performance tester for footwear, and there is no kinetic energy change. It can restore the actual operating state of the static anti-slip performance tester for footwear, and the measurement is more accurate.

[0061] This device is not only applicable to the split sensor 2, but all displacement sensors using infrared photoelectric displacement sensors or non-contact displacement sensors can be applicable to this device, but the accuracy and convenience are different. The split sensor 2 can be replaced according to actual operation.

[0062] Although the specific implementation modes of the present invention are described above, those skilled in the art should understand that the specific implementation modes described are only illustrative and are not intended to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A horizontal pulling speed calibration device for a shoe anti-skid performance testing machine, the shoe anti-skid performance testing machine comprising a testing machine base (1), a machine body controller (11), a pulling rod (12), a sole clamp (13) and a friction panel (14), wherein the pulling rod (12) is connected between the machine body controller (11) and the sole clamp (13), the friction panel (14) is horizontally fixed on the testing machine base (1), and the sole clamp (13) is horizontally slidably arranged on the friction panel (14); It is characterized in that The speed calibration device includes: The split sensor (2) comprises a sensing sleeve (21) and a displacement rod (22), wherein the displacement rod (22) is inserted into the sensing sleeve (21) without contact. The sensing sleeve (21) is horizontally and stably arranged on the lifting bracket (4); the split sensor (2) is locked on the top of the lifting bracket (4) by bolts; the displacement rod (22) is horizontally locked and installed on the outside of the sole clamp (13); the displacement rod (22) is slidably arranged in the sensing sleeve (21) along the horizontal direction; and the axes of the sensing sleeve (21) and the displacement rod (22) coincide with the horizontal sliding path of the sole clamp (13) on the same horizontal plane; A data processor (3) having a display screen (31) disposed thereon, a crystal resonator also being disposed inside the data processor (3), the data processor (3) being respectively data-connected to the display screen (31) and the crystal resonator, and the data processor (3) being also data-connected to the split sensor (2); The horizontal axes of the sensing sleeve (21) and the displacement rod (22) are in the same straight line.

2. The horizontal pulling speed calibration device of the footwear anti-slip performance testing machine according to claim 1, characterized in that: The data processor (3) and the display screen (31) are electrically connected to an external power source.

3. The horizontal pulling speed calibration device of the footwear anti-slip performance testing machine according to claim 1, characterized in that: The induction sleeve (21) is a hollow cylinder of the inductor, and the displacement rod (22) is an induction iron core.

4. The horizontal pulling speed calibration device of the footwear anti-slip performance testing machine according to claim 1, characterized in that: The lifting bracket (4) is a lifting tripod.

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