Rubber ring health status measuring device and measuring method

Abstract

The present invention discloses a device for measuring the health status of a rubber ring and a method for measuring the same. The device includes a limit slide, a movable chuck assembly, a fixed chuck assembly, a displacement sensor, and a tension sensor. The tension sensors are arranged at different ends of the limit slide. The fixed chuck assembly is arranged at the force-bearing end of the tension sensor. The movable chuck assembly includes a plurality of first and second limit devices. The first and second limit devices are respectively adjacent to the tension sensors at both ends of the limit slide and correspond one-to-one with the tension sensors at the ends. The movable chuck assembly can be reciprocated and arranged on the limit slide. The displacement sensor is connected to the movable chuck assembly. The method uses the device to perform measurements. Rubber ring samples of different sizes are mounted on the first or second limit device, and the other end is mounted on the fixed chuck assembly. The movable chuck assembly reciprocates on the limit slide. The tension sensor and the displacement sensor respectively record the elastic force of the rubber ring during the tension test and the sliding distance of the movable chuck assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of rubber sealing rings, and in particular to a rubber ring health status measuring device and a measuring method thereof. Background Art

[0002] In recent years, testing needs for rubber seal lifespan research have typically relied on the Arrhenius model, increasing the seal's ambient temperature to accelerate the material's aging process and measuring the corresponding physical properties at various times. However, extrapolating these observed physical properties is difficult to simulate on-site operating conditions, and the loads on equipment constantly change during operation. Consequently, the estimated remaining lifespan is inaccurate, making it difficult to guide maintenance work.

[0003] The life cycle change process of the sealing ring conforms to the Markov chain, that is, the current state is related to the previous state. Through reasonable tensile testing and based on the current permanent deformation rate and elastic coefficient, the probability of belonging to each state is calculated. In this process, a tensile measuring device is required to measure the tension, permanent deformation rate, and elastic coefficient of each point, and use it as characteristic data, combined with the historical state evolution process of the sealing ring, to accurately calculate the current health state. However, the existing rubber sealing ring health research method, on the one hand, uses a simple tensile measuring device with a simple structure, which is difficult to quickly adapt to the experimental needs of different types of rubber rings. On the other hand, this method needs to fit the working conditions at high temperature, which is too costly. In addition, the on-site working conditions are difficult to simulate, resulting in low inference accuracy. Summary of the Invention

[0004] In view of this, in order to overcome the defects of the prior art, the first purpose of the present invention is to provide a rubber ring health status measuring device that can adapt to the experimental requirements of different types of rubber rings and achieve non-destructive and accurate determination of the health status of the sealing ring.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A device for measuring the health status of a rubber ring includes a limit slide, a movable clamp assembly, a fixed clamp assembly, a displacement sensor and multiple tension sensors. The tension sensors are arranged at both ends of the limit slide, and the number of tension sensors at both ends of the limit slide is different. The fixed clamp assembly is arranged at the force-bearing end of the tension sensor. The movable clamp assembly includes multiple first limit devices and multiple second limit devices. The first limit device is close to the tension sensor at one end of the limit slide and is arranged in a one-to-one correspondence with the tension sensor at that end. The second limit device is close to the tension sensor at the other end of the limit slide and is arranged in a one-to-one correspondence with the tension sensor at that end. The movable clamp assembly can be reciprocated and arranged on the limit slide. The displacement sensor is connected to the movable clamp assembly. According to the rubber ring samples of different sizes, one end is sleeved on the first limit device or the second limit device, and then the other end is sleeved on the corresponding fixed chuck assembly, so that the rubber ring sample is limited between the movable chuck assembly and the fixed chuck assembly. The movable chuck assembly moves back and forth on the limit slide. The elastic force of the rubber ring sample during the tensile test is recorded by the tension sensor, and the accurate sliding distance of the movable chuck assembly is recorded by the displacement sensor, so as to obtain accurate experimental test data, and then the elasticity of the limited rubber ring sample is measured, so as to meet the experimental requirements of different types of rubber rings and realize non-destructive and accurate judgment of the health status of the sealing ring.

[0007] In the above technical solution, preferably, the movable chuck assembly further comprises a sliding seat, an upper fixed plate disposed on the sliding seat, and a T-shaped plate disposed on the upper fixed plate, the first limiting device being rotatably connected to one side of the T-shaped plate, the second limiting device being rotatably connected to the other side of the T-shaped plate, and the sliding seat being reciprocally movable on the limiting slide. The upper fixed plate and the T-shaped plate are designed to be detachable. Through the detachable design of the upper fixed plate and the T-shaped plate, rubber ring samples of different sizes can be mounted on the first limiting device or the second limiting device, and then the other end is mounted on the corresponding limiting sleeve, so that the rubber ring sample is limited between the movable chuck assembly and the U-shaped limiting seat.

[0008] In the above technical solution, it is further preferred that the fixed clamp assembly includes a U-shaped limit seat, a limit bolt arranged on the U-shaped limit seat, and a limit sleeve arranged on the limit bolt, the U-shaped limit seat is connected to the force-bearing end of the tension sensor, and the opening of the U-shaped limit seat faces the limit slide.

[0009] In the above technical solution, it is further preferred that it also includes a driving component for driving the sliding seat to move back and forth, the driving component includes a driving motor and a screw rod arranged on the output end of the driving motor, a threaded hole is provided on the sliding seat, and the sliding seat is threadedly matched with the screw rod.

[0010] In the above technical solution, it is further preferred that the system further comprises a control device, wherein the control device is respectively connected to the displacement sensor and the tension sensor for signal transmission. The control device is an industrial computer.

[0011] In the above technical solution, and further preferably, it also includes a base for installing the limiting slide, and the base is symmetrically provided with fixing plates for fixing the tension sensor, the drive motor is arranged on one of the fixing plates, and the base is also provided with a mounting bracket for installing the control device.

[0012] A second object of the present invention is to provide a method for determining the health status of a rubber ring, comprising the following steps:

[0013] Step 1: A preliminary fatigue test is performed on the rubber ring sample. The rubber ring sample used for the preliminary fatigue test is limited between a movable chuck assembly and a fixed chuck assembly. The movable chuck assembly moves back and forth on a limit slide to repeatedly stretch the rubber ring sample. The change values ​​of the tension sensor and the displacement sensor are collected according to the set stretching distance of the rubber ring sample, and the instantaneous elastic coefficient K and deformation rate T of each rubber ring sample are calculated until the rubber ring sample fails. The number of current cycles and the collected and calculated data are recorded; Step 2: A non-destructive test is performed on the same model rubber ring sample. The same model rubber ring sample is stretched back and forth once, and the instantaneous elastic coefficient K and deformation rate T of the rubber ring sample undergoing non-destructive testing are recorded; Step 3: The actual health status of the rubber ring sample undergoing non-destructive testing is obtained.

[0014] In the above technical solution, preferably, the instantaneous elastic coefficient K is calculated as follows: K = (F2-F1) / (L2-L1), wherein F1 is the tension collected at time T1, F2 is the tension collected at time T2, L1 is the stroke when the tension F1 is collected at time T1, and L2 is the stroke L2 when the tension F2 is collected at time T2; the deformation rate T is calculated as follows: T = (Le-Ls) / Ls×100%, wherein Ls is the initial length of the O-ring when the rubber ring sample is stretched to 5N at the beginning of the test, and Le is the length of the O-ring when the force of the rubber ring sample stretching the O-ring is restored to 5N at the end of the test.

[0015] In the above technical solution, further preferably, obtaining the actual health status of the rubber ring sample includes the following steps:

[0016] S1. Build feature data and label data of the knowledge base:

[0017] Establishing characteristic data includes: calculating the deformation rate and elastic coefficient of the rubber ring sample undergoing the fatigue test in units of each stretching cycle, recording the deformation rate and elastic coefficient of the rubber ring sample every time the rubber ring sample undergoing the fatigue test is stretched a set distance, wherein the elastic coefficient includes an average elastic coefficient, a maximum elastic coefficient, and a minimum elastic coefficient, and using the deformation rate and elastic coefficient as characteristic data of the knowledge base;

[0018] Establishing the label data includes: recording the number of stretching cycles N of the rubber ring sample undergoing a fatigue test when it fails, and recording the states of the rubber ring samples whose stretching cycles fall within [1, N / 5], [N / 5, N*2 / 5], [N*2 / 5, N*3 / 5], [N*3 / 5, N*4 / 5], and [N*4 / 5, N] as healthy, relatively healthy, average, relatively poor, and failed, respectively, and using these as label data for each record in the knowledge base;

[0019] S2. Use the softmax model to learn each record in the knowledge base and obtain the probability of the feature data corresponding to each state;

[0020] S3. Encode the rubber ring samples of the same model that undergo non-destructive testing, conduct regular testing, and record the test results in the database. The database is used to manage the rubber ring samples that undergo non-destructive testing throughout their life cycle.

[0021] In the above technical solution, it is further preferred that the full life cycle management includes the following steps:

[0022] S301, stretching the rubber ring sample back and forth once, during which the elastic coefficient of the rubber ring sample is recorded according to a set stretching distance, and the deformation rate, average elastic coefficient, maximum elastic coefficient, and minimum elastic coefficient of the rubber ring sample during this stretching are calculated and used as characteristic data for discrimination;

[0023] S302, according to the softmax model obtained in step S2, calculate the probability of belonging to each state and use it as the emission probability of the hidden Markov model;

[0024] S303, searching the knowledge base, counting the transition probabilities between different states, and using them as the transition probability matrix of the hidden Markov model;

[0025] S304 , obtaining the historical status of the rubber ring sample by searching the database, forming a Markov chain, and obtaining the actual health status of the rubber ring sample according to the Hidden Markov Model Viterbi algorithm.

[0026] Due to the adoption of the above technical solutions, the present invention is advantageous over the prior art in that: the rubber ring health status determination device of the present invention can be mounted on the first or second limiting device according to different sizes of rubber ring specimens, and then the other end is mounted on the corresponding fixed chuck assembly, so that the rubber ring specimen is constrained between the movable chuck assembly and the fixed chuck assembly. The movable chuck assembly reciprocates on the limiting slide. The tension sensor records the elastic force of the rubber ring specimen during the tension test, and the displacement sensor records the accurate sliding distance of the movable chuck assembly, thereby obtaining accurate experimental test data. The elasticity of the constrained rubber ring specimen can be measured, thereby meeting the experimental requirements of different types of rubber rings. The operation is convenient and fast, and the entire measurement and calculation process is accelerated. The rubber ring health status determination method of the present invention operates under normal temperature and pressure through scientific experimental calculations, does not require simulation of actual working conditions, is simple and easy to implement, and can accurately obtain results. By simply quickly detecting the permanent deformation rate and elastic modulus of the sealing ring specimen and based on the historical records of the specimen, the health status of the sealing ring specimen can be accurately determined. This is efficient and convenient, facilitating maintenance personnel's decision-making on whether to replace the specimen, thereby shortening equipment maintenance time. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 This is a schematic structural diagram of a rubber ring health status measuring device from a first angle in a preferred embodiment of the present invention;

[0029] Figure 2 2. It is a structural schematic diagram of a rubber ring health status measuring device from a second angle in a preferred embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the front structure of a rubber ring health status measuring device in a preferred embodiment of the present invention;

[0031] In the figure: main unit 100, base 101, mounting frame 102, industrial computer 103, limit slide 104, support foot 105, wire displacement meter 106, fixed fixture unit 200, fixed plate 201, tension sensor 202, stepper motor 203, screw 204, U-shaped limit seat 205, limit bolt 205a, limit sleeve 206, movable fixture unit 300, threaded seat 301, movable chuck 302, upper fixed plate 302a, T-shaped plate 302b, limit column 302c, second limit sleeve 302d, connecting plate 303. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0033] Example 1: Reference Figures 1 to 3 This embodiment provides a rubber ring health status measuring device, which includes: a main body unit 100, a fixed clamp unit 200 and a movable clamp unit 300.

[0034] Among them, the main unit 100 includes: a base 101, a limiting slide 104 arranged on the base 101, and a plurality of supporting feet 105 arranged on the bottom side of the base 101. A wire displacement meter 106 is also provided on the base 101. The upper side of the base 101 is fixedly connected to a mounting frame 102, and an industrial computer 103 is installed on the mounting frame 102.

[0035] The fixing fixture unit 200 includes: a fixing plate 201 symmetrically arranged on the base 101, a stepper motor 203 arranged on one side of the fixing plate 201, and a screw rod 204 arranged on the output end of the stepper motor 203, wherein different numbers of tension sensors 202 are installed on the fixing plates 201 on both sides, and a fixing chuck assembly is arranged on the force-bearing end of the tension sensor 202, and the fixing chuck assembly includes: a U-shaped limit seat 205 fixedly connected to the force-bearing end of the tension sensor 202, a limit bolt 205a arranged on the U-shaped limit seat 205, and a limit sleeve 206 arranged on the limit bolt 205a. After the limit bolt 205a is removed, the rubber ring to be tested can be placed on the limit sleeve 206, and then the limit bolt 205a is used to limit the limit sleeve 206 in the U-shaped limit seat 205; of course, it is obvious that the opening of the U-shaped limit seat 205 faces the limit slide 104.

[0036] The movable clamp unit 300 is a movable chuck assembly, including: a threaded seat 301 slidably set on the limiting slide 104 and a movable chuck 302 set on the threaded seat 301, the threaded seat 301 is threadedly matched with the screw rod 204, wherein the threaded seat 301 is a sliding seat, and of course a threaded hole is provided on the sliding seat. Specifically, the movable chuck 302 includes: an upper fixed plate 302a fixedly set on the threaded seat 301, a T-shaped plate 302b installed on the upper fixed plate 302a by fixing bolts, a plurality of limiting columns 302c rotatably set on the upper fixed plate 302a, which are the first limiting device, and a plurality of second limiting sleeves 302d rotatably set on the upper fixed plate 302a, which are the second limiting device. The upper fixing plate 302a and the T-shaped plate 302b are designed to be detachable. After they are detached, small-sized rubber ring samples can be placed on the limiting column 302c, and large-sized rubber ring samples can be placed on the second limiting sleeve 302d. The small-sized rubber ring sample is placed on the limiting column 302c, and then the T-shaped plate 302b is fixed to the upper fixing plate 302a.

[0037] In addition, different numbers of tension sensors 202 are provided on the fixing plates 201 on both sides. Figure 1 As can be seen, there are 5 tension sensors 202 on the fixed plate 201 on the left, and 3 tension sensors 202 on the fixed plate 201 on the right. The setting intervals of the tension sensors 202 on both sides are different, and the setting numbers of the limit columns 302c and the second limit sleeves 302d are respectively the same as the setting numbers of the tension sensors 202 on both sides and are set one to one. The distribution of U-shaped limit seats 205 with different intervals on both sides facilitates the setting and limiting work of rubber ring specimens of different sizes.

[0038] Furthermore, a connecting plate 303 is fixedly connected to the threaded seat 301. This connecting plate 303 is fixedly connected to the tension end of the wire displacement meter 106. When the threaded seat 301 moves, the wire in the wire displacement meter 106 moves accordingly. The industrial computer 103 is connected to the wire displacement meter 106 and the tension sensor 202 to record the readings of each sensor.

[0039] During use, the upper fixing plate 302a and the T-shaped plate 302b are detachable, so that rubber ring samples of different sizes can be put on the limiting column 302c or the second limiting sleeve 302d, and then the other end is put on the corresponding limiting sleeve 206, and the limiting sleeve 206 is fixed by the limiting bolt 205a, so that the rubber ring sample is limited between the movable clamp 302 and the U-shaped limiting seat 205. At the same time, the fixing bolt fixes the T-shaped plate 302b on the upper fixing plate 302a, and the stepping motor 203 is started to make the threaded seat 301 slide on the limiting slide 104, and the elasticity of the limited rubber ring sample is measured to meet different experimental requirements. The operation is convenient and fast, the elastic force of the rubber ring sample during the tensile test is recorded by the tension sensor 202, and the accurate sliding distance of the threaded seat 301 is recorded by the wire displacement meter 106, so as to obtain accurate experimental test data.

[0040] Example 2: This example also provides a method for measuring the health status of a rubber ring, which uses the above-mentioned device for measuring the health status of a rubber ring and specifically includes the following steps:

[0041] Step 1: The rubber ring health status measuring device is placed in a designated temperature test chamber, and the industrial computer 103 of the measuring device is connected to the cloud server through the network. The test personnel control the device by connecting to the cloud server through the terminal device.

[0042] Step 2: According to the size of the rubber ring sample for the basic fatigue test, the rubber ring sample is limited between the limit column 302c and the U-shaped limit seat 205 or between the second limit sleeve 302d and the U-shaped limit seat 205. Then the tester sends a command to the industrial computer 103 through the terminal device, so that the measuring device starts working, and the stepper motor 203 drives the movable clamp assembly to start moving and stretching.

[0043] Step 3: Sample the change values ​​of the tension sensor 202 and the wire displacement meter 106 at a rate of 20 Hz per second, and calculate the instantaneous elastic coefficient K and deformation rate T of each rubber ring sample undergoing the fatigue test. Specifically, K = (F2-F1) / (L2-L1), where F1 is the tension collected at time T1, F2 is the tension collected at time T2, L1 is the stroke when the tension F1 is collected at time T1, and L2 is the stroke L2 when the tension F2 is collected at time T2;

[0044] T = (Le - Ls) / Ls * 100%, where Ls is the initial length of the O-ring, which is the length of the O-ring from the start of the test until the tension of the rubber ring sample reaches 5N, and Le is the final length of the O-ring, which is the length of the O-ring when the tension of the rubber ring sample is restored to 5N at the end of the test.

[0045] Step 4: Fatigue testing of the rubber ring specimen is performed by repeatedly loading the rubber ring specimen with a load by controlling the reciprocating motion of the movable chuck assembly. Specifically, the stretching rate is set to 150%, and the rubber ring specimen is repeatedly stretched until the rubber ring specimen fails, thereby establishing a knowledge base. Failure is defined as a 40% decrease in the elastic modulus of the rubber ring specimen, a deformation rate of more than 40% after stretching, or a breakage of the rubber ring specimen. The specific method for establishing the knowledge base is as follows:

[0046] S1. Create feature data and label data:

[0047] Establishing characteristic data includes: during the stretching process, recording the elastic coefficient of the rubber ring sample every 3 mm of stretching as described in step 3. On this basis, the deformation rate, average elastic coefficient, maximum elastic coefficient, and minimum elastic coefficient of the rubber ring sample are calculated for each stretching cycle and used as characteristic data of the knowledge base;

[0048] Establishing label data includes: recording the number of stretching cycles N at failure, and recording the rubber ring sample state when the stretching cycle number falls within [1, N / 5] as healthy, recording the rubber ring sample state when the stretching cycle number falls within [N / 5, N*2 / 5] as relatively healthy, recording the rubber ring sample state when the stretching cycle number falls within [N*2 / 5, N*3 / 5] as fair, recording the rubber ring sample state when the stretching cycle number falls within [N*3 / 5, N*4 / 5] as relatively poor, and recording the rubber ring sample state when the stretching cycle number falls within [N*4 / 5, N] as failed, and these are used as label data for each record in the knowledge base;

[0049] S2. Use the softmax model to learn each record in the knowledge base and obtain the probability that the feature data corresponds to each state.

[0050] Step 5: Code the rubber ring samples of the same model that undergo non-destructive testing, conduct regular inspections, and record the inspection results in the database. The database is used to manage the rubber ring samples throughout their life cycle.

[0051] Among them, the whole life cycle management includes the following steps:

[0052] S301. Set the stretching rate to 100%, stretch the rubber ring sample back and forth once. During the stretching process, record the elastic coefficient of the rubber ring sample every 3 mm of stretching. On this basis, calculate the deformation rate of the rubber ring back and forth as well as the average elastic coefficient, maximum elastic coefficient, and minimum elastic coefficient, and use them as characteristic data for discrimination.

[0053] S302, according to the softmax model obtained in step S2, calculate the probability of belonging to each state and use it as the emission probability of the hidden Markov model;

[0054] S303, searching the knowledge base, counting the transition probabilities between different states, and using them as the transition probability matrix of the hidden Markov model;

[0055] S304 , obtaining the historical status of the rubber ring sample by searching the database, forming a Markov chain, and obtaining the actual health status of the rubber ring sample according to the Hidden Markov Model Viterbi algorithm.

[0056] Of course, the actual health status of the rubber ring specimen includes healthy, relatively healthy, general, relatively poor and failure.

[0057] The rubber ring health status determination method of this embodiment is based on scientific experimental calculations and operates at room temperature and pressure. It does not require simulation of actual working conditions and is simple and easy to implement, while accurately obtaining results. It only requires rapid testing of the permanent deformation rate and elastic modulus of the rubber ring specimen and, based on the historical records of the specimen, accurately determines the health status of the sealing ring specimen. This method is efficient and convenient, facilitating maintenance personnel's decision-making regarding whether to replace the specimen, thereby shortening equipment maintenance time.

[0058] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made in accordance with the spirit of the present invention are intended to be covered by the scope of protection of the present invention.

Claims

1. A rubber ring health status measuring device, characterized in that: It includes a limit slide, a movable clamp assembly, a fixed clamp assembly, a displacement sensor and a plurality of tension sensors, the tension sensors are arranged at both ends of the limit slide, and the number of tension sensors at both ends of the limit slide is different, the fixed clamp assembly is arranged at the force-bearing end of the tension sensor, the movable clamp assembly includes a plurality of first limit devices and a plurality of second limit devices, the first limit device is close to the tension sensor at one end of the limit slide and is arranged in a one-to-one correspondence with the tension sensor at this end, the second limit device is close to the tension sensor at the other end of the limit slide and is arranged in a one-to-one correspondence with the tension sensor at this end, the movable clamp assembly can be reciprocated and arranged on the limit slide, and the displacement sensor is connected to the movable clamp assembly; The movable chuck assembly further includes a sliding seat, an upper fixed plate disposed on the sliding seat, and a T-shaped plate detachably mounted on the upper fixed plate, the first limiting device being rotatably connected to one side of the T-shaped plate, the second limiting device being rotatably connected to the other side of the T-shaped plate, and the sliding seat being reciprocally movable on the limiting slide; The fixed clamp assembly includes a U-shaped limit seat, a limit bolt arranged on the U-shaped limit seat, and a limit sleeve arranged on the limit bolt. The U-shaped limit seat is connected to the force-bearing end of the tension sensor, and the opening of the U-shaped limit seat faces the limit slide.

2. The rubber ring health status measuring device according to claim 1, characterized in that: It also includes a driving assembly for driving the sliding seat to move back and forth, the driving assembly includes a driving motor and a screw rod arranged on the output end of the driving motor, a threaded hole is provided on the sliding seat, and the sliding seat is threadedly matched with the screw rod.

3. The rubber ring health status measuring device according to claim 2, characterized in that: It also includes a control device, which is connected to the displacement sensor and the tension sensor signals respectively.

4. The rubber ring health status measuring device according to claim 3, characterized in that: It also includes a base for installing the limit slide, on which fixing plates for fixing the tension sensor are symmetrically arranged, and the drive motor is arranged on one of the fixing plates. The base is also provided with a mounting bracket for installing the control device.

5. A method for measuring the health status of a rubber ring, using the rubber ring health status measuring device according to any one of claims 1 to 4, characterized in that: The method comprises the following steps: step 1: performing a fatigue test on a rubber ring sample, wherein the rubber ring sample used for the fatigue test is limited between a movable chuck assembly and a fixed chuck assembly, and the movable chuck assembly moves back and forth on a limit slide to repeatedly stretch the rubber ring sample, and collects the change values ​​of the tension sensor and the displacement sensor according to the stretching distance set for the rubber ring sample, and calculates the instantaneous elastic coefficient K and deformation rate T of each rubber ring sample until the rubber ring sample fails, and records the number of current cycles, the collected and calculated data; step 2: performing non-destructive testing on the same type of rubber ring sample, stretching the same type of rubber ring sample back and forth once, and recording the instantaneous elastic coefficient K and deformation rate T of the rubber ring sample undergoing non-destructive testing; step 3: obtaining the actual health status of the rubber ring sample undergoing non-destructive testing.

6. The method for measuring the health status of a rubber ring according to claim 5, characterized in that: The instantaneous elastic coefficient K is calculated as follows: K = (F2-F1) / (L2-L1), where F1 is the tension collected at time T1, F2 is the tension collected at time T2, L1 is the stroke when the tension F1 is collected at time T1, and L2 is the stroke L2 when the tension F2 is collected at time T2; the deformation rate T is calculated as follows: T = (Le-Ls) / Ls×100%, where Ls is the initial length of the O-ring when the rubber ring sample is stretched to 5N at the beginning of the test, and Le is the length of the O-ring when the force of the rubber ring sample stretching the O-ring returns to 5N at the end of the test.

7. The method for measuring the health status of a rubber ring according to claim 6, characterized in that: Determining the actual health status of the rubber ring specimen includes the following steps: S1. Build feature data and label data of the knowledge base: Establishing characteristic data includes: calculating the deformation rate and elastic coefficient of the rubber ring sample undergoing the fatigue test in units of each stretching cycle, recording the deformation rate and elastic coefficient of the rubber ring sample every time the rubber ring sample undergoing the fatigue test is stretched a set distance, wherein the elastic coefficient includes an average elastic coefficient, a maximum elastic coefficient, and a minimum elastic coefficient, and using the deformation rate and elastic coefficient as characteristic data of the knowledge base; Establishing label data includes: recording the number of stretching cycles N when the rubber ring specimen undergoing a fatigue test fails, and recording the states of the rubber ring specimens whose stretching cycles fall into [1, N / 5], [N / 5, N*2 / 5], [N*2 / 5, N*3 / 5], [N*3 / 5, N*4 / 5], and [N*4 / 5, N] as healthy, relatively healthy, average, relatively poor, and failed, respectively, and using these as label data for each record in the knowledge base; S2. Use the softmax model to learn each record in the knowledge base and obtain the probability of the feature data corresponding to each state; S3. Encode the rubber ring samples of the same model that undergo non-destructive testing, conduct regular testing, and record the test results in the database. The database is used to manage the rubber ring samples that undergo non-destructive testing throughout their life cycle.

8. The method for measuring the health status of a rubber ring according to claim 7, characterized in that: The full life cycle management includes the following steps: S301, stretching the rubber ring sample back and forth once, during which the elastic coefficient of the rubber ring sample is recorded according to a set stretching distance, and the deformation rate, average elastic coefficient, maximum elastic coefficient, and minimum elastic coefficient of the rubber ring sample during this stretching are calculated and used as characteristic data for discrimination; S302, according to the softmax model obtained in step S2, calculate the probability of belonging to each state and use it as the emission probability of the hidden Markov model; S303, searching the knowledge base, counting the transition probabilities between different states, and using them as the transition probability matrix of the hidden Markov model; S304 , obtaining the historical status of the rubber ring sample by searching the database, forming a Markov chain, and obtaining the actual health status of the rubber ring sample according to the Hidden Markov Model Viterbi algorithm.

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