Rubber sealing ring monitoring and early warning system based on ultrasonic conduction

Abstract

The invention relates to the field of pipeline connection processing, and discloses a rubber sealing ring monitoring and early warning system based on ultrasonic conduction, which comprises a signal monitoring module, a signal analysis module, a sealing state detection module, a frequency spectrum data acquisition module, a comparative analysis module and an early warning feedback module, by analyzing the propagation speed of an ultrasonic signal in a material and comparing the time difference of transmitting and receiving the signal, the position of a sealing defect is calculated, so that the sealing ring with an abnormal sealing state is detected and screened, and by performing secondary analysis on the screened sealing ring and collecting frequency spectrum data in the ultrasonic signal, the sealing performance of the sealing ring is improved. And comparing the data with historical data or reference data to judge whether the current performance state of the sealing ring with an abnormal sealing state is abnormal or not, and carrying out early warning, so that the aging degree and leakage risk of the sealing ring can be continuously detected, and the abnormal performance problem of the sealing ring can be found as early as possible. The accuracy and reliability of sealing performance monitoring can be effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline connection processing, and more specifically to a rubber sealing ring monitoring and early warning system based on ultrasonic conduction. Background Art

[0002] In pipeline connection devices, sealing rings are key components to ensure the sealing performance of pipelines. Rubber sealing rings are widely used in flange devices due to their good elasticity and sealing performance. However, during long-term use, rubber sealing rings are prone to aging, hardening or softening due to factors such as environmental influences, frequent start-stop, chemical corrosion, and temperature changes, which leads to a decrease in sealing performance and causes pipeline leakage. In addition, in some fields with extremely high safety requirements (such as aerospace, chemical industry, etc.), leakage may cause serious catastrophic accidents and inestimable losses. Therefore, real-time monitoring and early warning of the status of the sealing ring are of great significance. However, the existing sealing ring sealing detection technology still lacks continuous detection, which makes it impossible to detect the abnormal performance of the sealing ring early, and it is difficult to detect the sealing state of the sealing ring, and it is impossible to accurately capture the subtle state changes of the sealing ring. Therefore, there is still a lack of a method based on accurate quantification and real-time monitoring to detect the aging of rubber sealing rings and the leakage risk caused by them. Summary of the invention

[0003] In order to overcome the above-mentioned defects of the prior art, the present invention provides a rubber sealing ring monitoring and early warning system based on ultrasonic conduction to solve the problems existing in the above-mentioned background technology.

[0004] The present invention provides the following technical solution: a rubber sealing ring monitoring and early warning system based on ultrasonic conduction, comprising:

[0005] Signal monitoring module: used for real-time monitoring and collection of ultrasonic signals sent and received by the ultrasonic sensor, including a signal sending unit and a signal receiving unit, and transmitting the received ultrasonic signals to the signal analysis module;

[0006] Signal analysis module: used to analyze the propagation speed of ultrasonic signals in the material, and then monitor the propagation state of ultrasonic signals in the sealing ring in real time by analyzing and comparing the time difference between the transmitted and received signals, and transmit the analysis results of signal propagation to the sealing state detection module;

[0007] Sealing status detection module: Based on the analysis results of ultrasonic signal propagation, the sealing defect position is calculated to determine whether the sealing status of the sealing ring is abnormal, and the sealing rings with abnormal sealing status are screened;

[0008] Spectrum data acquisition module: Based on the sealing state detection result, the received ultrasonic signal is processed by the signal processing device, and the ultrasonic signal is further converted into spectrum data, so as to collect the spectrum data;

[0009] Comparative analysis module: Based on the established attenuation model of the signal processing device, the analysis result is compared with the historical data or the benchmark data to determine whether the current performance state of the sealing ring with abnormal sealing state has abnormal problems;

[0010] Early warning feedback module: Based on early warning of sealing rings with abnormal sealing performance, it displays real-time monitoring results. When aging or leakage risk of the sealing ring is detected, an audible and visual alarm or a network alarm is issued, and the abnormality is recorded.

[0011] Preferably, the signal monitoring module comprises a transmitting end and a receiving end by installing ultrasonic transducers on the pipes on both sides of the sealing ring respectively, and transmits ultrasonic waves through the sealing ring, periodically emits ultrasonic waves through the transmitting end transducer, and synchronously collects signals by the receiving end. The signal sending unit is used to monitor and collect the ultrasonic pulses and pulse emission time emitted by the transmitting end of the ultrasonic transducer, and the signal receiving unit is used to monitor and collect the ultrasonic signals transmitted by the sealing ring and the signal receiving time received by the receiving end of the ultrasonic transducer.

[0012] Preferably, the signal analysis module calculates the propagation speed of the ultrasonic wave in the material. , where x represents the propagation distance of the ultrasonic wave in the sealing ring, and t represents the propagation time; then calculate the time difference between the transmitted and received signals ,in, Indicates the time when the signal is received. Indicates the time when the pulse is emitted.

[0013] Preferably, the sealing state detection module is based on the propagation speed v of the ultrasonic wave in the material and the time difference between the transmitting and receiving signals. To calculate the sealing defect position, the sealing state of the sealing ring is detected according to the sealing defect position, so as to determine whether there is an abnormality in the sealing state; the specific calculation formula for the sealing defect position is: If the calculated sealing defect position y exceeds the preset normal range of the sealing ring, it is judged that the sealing state of the sealing ring is abnormal, and the sealing ring with abnormal sealing state at this time is screened out.

[0014] Preferably, the spectrum data acquisition module processes the received ultrasonic signal based on the signal processing device, so as to collect the spectrum data of the screened sealing ring with abnormal sealing state, and performs A / D conversion on the received ultrasonic signal of the sealing ring with abnormal sealing state through the signal processing device, and then performs fast Fourier transform (FFT) after obtaining the time domain signal to extract the spectrum characteristics, including amplitude, phase and main frequency distribution.

[0015] Preferably, the comparative analysis module compares and analyzes the extracted spectrum features with their changes over time or in the use cycle, and establishes the propagation attenuation model and spectrum drift model of the ultrasonic wave in the sealing ring according to the material and structural characteristics of the sealing ring. By comparing the spectrum information collected at different times, the attenuation and main frequency drift of the ultrasonic wave propagation in the sealing ring are analyzed in detail. As the rubber sealing ring ages, its elastic modulus E and attenuation constant will change, causing the main frequency to shift Or the amplitude attenuation Significant attenuation;

[0016] The specific calculation formula of the elastic modulus is: ,in, represents the density of the sealing ring material, and v represents the propagation speed of ultrasonic waves in the material;

[0017] The specific calculation formula of the attenuation constant is: , where x represents the propagation distance of the ultrasonic wave in the sealing ring, represents the initial signal strength, Indicates the signal strength at frequency f;

[0018] The specific calculation formula for the main frequency offset is: ,in, Indicates the current main frequency. Indicates the initial main frequency;

[0019] The specific calculation formula of the amplitude attenuation is: ,in, represents the initial amplitude, Indicates the current amplitude;

[0020] By using the elastic modulus E and the attenuation constant As input parameters, combined with the use conditions of the seal ring, a prediction model is established to predict the performance degradation of the seal ring under different use conditions; during the aging process of the monitoring seal ring, the hardening or softening of the rubber will cause the elastic modulus E to change, and the attenuation constant will also change accordingly. It is reflected in the changes of ultrasonic signal intensity and main frequency position under frequency. By comparing the spectrum data collected multiple times, the aging progress curve can be obtained. The horizontal axis of the aging progress curve is time, and the vertical axis is the elastic modulus E and the attenuation constant. , the main frequency is offset Or the amplitude attenuation ; Then set the elastic modulus threshold respectively , decay constant threshold , Main frequency deviation threshold And the amplitude attenuation threshold ,like or or or , it is considered that the sealing ring with abnormal sealing state has abnormal current performance state, that is, it is judged that serious aging has occurred or there is a risk of leakage, and the abnormal judgment result is immediately transmitted to the early warning feedback module.

[0021] Preferably, when the early warning feedback module receives an abnormal judgment result, the system will automatically trigger an alarm and pop up a prompt message on the display, prompting the staff to replace or repair the sealing ring with abnormal performance in time, and at the same time archive the abnormal time and data records to provide a basis for subsequent maintenance and failure analysis.

[0022] Technical effects and advantages of the present invention:

[0023] The present invention is provided with a signal monitoring module to monitor and collect the ultrasonic signals sent and received by the ultrasonic sensor in real time, analyzes the propagation speed of the ultrasonic signal in the material through the signal analysis module, and compares the time difference between the transmitted and received signals, so as to monitor the propagation state of the ultrasonic signal in the sealing ring in real time, calculates the sealing defect position through the sealing state detection module to judge whether the sealing state of the sealing ring is abnormal, and screens the sealing ring with abnormal sealing state, collects the spectrum data in the ultrasonic signal through the spectrum data acquisition module, compares the analysis result with the historical data or the benchmark data through the comparison analysis module to judge whether the current performance state of the sealing ring with abnormal sealing state has abnormal problems, warns the sealing ring with abnormal sealing performance through the early warning feedback module, and displays the real-time monitoring results, and can realize continuous detection of the aging degree and leakage risk of the sealing ring by periodically transmitting and receiving ultrasonic signals, and can more accurately capture tiny performance degradation signals by utilizing the attenuation law of ultrasonic waves of different frequencies in the sealing ring, which is conducive to early discovery of abnormal performance problems of the sealing ring, and can effectively improve the accuracy and reliability of sealing performance monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a system structure block diagram of the present invention.

[0025] Figure 2 FIG. 4 is a schematic diagram of the signal processing flow of this embodiment.

[0026] Figure 3 1 is a diagram of the method steps of this embodiment. DETAILED DESCRIPTION

[0027] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are only examples. The rubber sealing ring monitoring and early warning system based on ultrasonic conduction involved in the present invention is not limited to the various structures recorded in the following embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0028] like Figure 1 The embodiment shown provides a rubber sealing ring monitoring and early warning system based on ultrasonic conduction, comprising:

[0029] Signal monitoring module: used for real-time monitoring and collection of ultrasonic signals sent and received by the ultrasonic sensor, including a signal sending unit and a signal receiving unit, and transmits the received ultrasonic signals to the signal analysis module.

[0030] In this embodiment, the signal monitoring module is achieved by installing ultrasonic transducers on the pipes on both sides of the sealing ring, including a transmitting end and a receiving end, transmitting ultrasonic waves through the sealing ring, periodically emitting ultrasonic waves through the transmitting end transducer, and synchronously collecting signals by the receiving end. The signal sending unit is used to monitor and collect the ultrasonic pulses and pulse emission time emitted by the transmitting end of the ultrasonic transducer, and the signal receiving unit is used to monitor and collect the ultrasonic signals transmitted by the sealing ring and the signal receiving time received by the receiving end of the ultrasonic transducer.

[0031] It should be specifically explained that, by attaching the transmitting end ultrasonic transducer to the pipe fitting on one side of the flange device and attaching the receiving end transducer to the pipe fitting on the other side, the transmitting end generates ultrasonic waves in a specific frequency range (such as 20kHz-2MHz), and the receiving end is used to receive ultrasonic signals transmitted through the sealing ring; the transmitting end emits ultrasonic waves covering the required detection frequency range; when the ultrasonic waves pass through the pipe wall-rubber sealing ring-pipe wall, they are received by the receiving end transducer to form real-time signal data; the signal sending unit is mainly responsible for generating ultrasonic signals and sending them to the sealing ring, and the signal receiving unit is mainly responsible for receiving ultrasonic signals reflected from the sealing ring;

[0032] After the ultrasonic transducer equipment is installed, the system needs to be calibrated, including:

[0033] (1) Baseline calibration of ultrasonic emission and reception;

[0034] (2) Input of sealing ring material properties, including elastic modulus, density, and pipe fitting related parameters;

[0035] (3) Measure and record the initial spectrum.

[0036] Signal analysis module: used to analyze the propagation speed of ultrasonic signals in the material, and then monitor the propagation status of ultrasonic signals in the sealing ring in real time by analyzing and comparing the time difference between the transmitted and received signals, and transmit the analysis results of signal propagation to the sealing status detection module.

[0037] In this embodiment, the signal analysis module first calculates the propagation speed of the ultrasonic wave in the material. , where x represents the propagation distance of the ultrasonic wave in the sealing ring, and t represents the propagation time; then calculate the time difference between the transmitted and received signals ,in, Indicates the time when the signal is received. Indicates the time when the pulse is emitted.

[0038] It should be specifically noted that the propagation speed obtained by calculation is compared with the theoretical propagation speed. If the two are consistent, it means that the material and structure of the sealing ring have not changed significantly; if the time difference is consistent with the expected propagation time, it means that the ultrasonic signal propagates in the sealing ring without obstruction; if the time difference increases, it indicates that there are defects inside the sealing ring, such as leakage or damage, which causes the ultrasonic propagation path to become longer.

[0039] Sealing status detection module: Based on the analysis results of ultrasonic signal propagation, the sealing defect position is calculated to determine whether the sealing status of the sealing ring is abnormal, and the sealing rings with abnormal sealing status are screened out.

[0040] In this embodiment, the sealing state detection module is based on the propagation speed v of the ultrasonic wave in the material and the time difference between the transmitting and receiving signals. To calculate the sealing defect position, the sealing state of the sealing ring is detected according to the sealing defect position, so as to determine whether there is an abnormality in the sealing state; the specific calculation formula for the sealing defect position is: If the calculated sealing defect position y exceeds the preset normal range of the sealing ring, it is judged that the sealing state of the sealing ring is abnormal, and the sealing ring with abnormal sealing state at this time is screened out.

[0041] It should be specifically noted that, in order to determine the preset normal range value of the sealing ring, the maximum propagation distance of the ultrasonic wave in the sealing ring is first determined according to the size of the sealing ring. , considering the error and safety requirements in practical applications, the maximum propagation distance Set a safety range based on ,in, represents the safety factor, and , and then determine the normal range value, and the normal range should be the distance range of ultrasonic wave propagation without defects. For example, if the length of the sealing ring is L, the normal range can be set as ,in, It represents the defect tolerance factor. The specific value is determined according to the design requirements. It is based on the calculated sealing defect position y and the normal range value. Compare to determine whether the sealing state of the sealing ring is normal. , the sealing state is considered normal, and the sealing state of the sealing ring is continuously monitored. , then the sealing state is considered abnormal and the sealing ring needs to be screened out;

[0042] Assume that the propagation speed v of ultrasonic wave in the sealing ring material is 5900 , the length of the sealing ring L is 100mm, the safety factor is 0.9, and the defect tolerance factor is 0.95, then the normal range Can be set to: , if the calculated defect position y exceeds 95 mm, the sealing state of the sealing ring is considered abnormal;

[0043] By combining the analysis results of the propagation speed and the time difference, the sealing status of the sealing ring can be judged more accurately. If the propagation speed decreases and the time difference increases, it indicates that there may be an abnormality in the sealing ring.

[0044] Spectrum data acquisition module: Based on the sealing status detection result, the received ultrasonic signal is processed by the signal processing device, and the ultrasonic signal is further converted into spectrum data, so as to collect the spectrum data.

[0045] In this embodiment, the spectrum data acquisition module processes the received ultrasonic signal based on the signal processing device, so as to collect the spectrum data of the screened sealing ring with abnormal sealing status, and performs A / D conversion on the received ultrasonic signal of the sealing ring with abnormal sealing status through the signal processing device, and then performs fast Fourier transform (FFT) after obtaining the time domain signal to extract the spectrum characteristics, including amplitude, phase and main frequency distribution.

[0046] It should be specifically explained that the signal processing device receives the ultrasonic signal of the sealing ring captured by the transducer, and then converts the signal into a digital signal through an A / D converter at a certain sampling rate (such as tens of thousands or millions of samples per second), and the digital signal processor pre-processes the signal, such as applying a bandpass filter to retain the signal within a specific frequency range, and performing FFT on the pre-processed signal to obtain the signal's spectrum, and then analyzes the FFT results to extract spectrum characteristics such as amplitude, phase and main frequency distribution.

[0047] like Figure 2 The ultrasonic signal processing flow of this embodiment is shown as follows:

[0048] Signal generation: Generate variable frequency ultrasonic signals through signal processor;

[0049] Signal amplification and transmission: The generated ultrasonic signal is enhanced by the signal amplifier, sent to the transducer, and the electrical signal is converted into ultrasonic wave;

[0050] Signal propagation and reflection: Ultrasonic waves propagate in the medium and are reflected back when they encounter an object;

[0051] Signal reception and conversion: The receiving transducer converts the reflected ultrasonic waves into electrical signals;

[0052] Signal processing and analysis: The electrical signal is processed and analyzed through the signal processing unit to extract useful information.

[0053] Comparative analysis module: Based on the signal processing device and the established attenuation model, the analysis result is compared with the historical data or the benchmark data to determine whether the current performance state of the sealing ring with abnormal sealing state has abnormal problems.

[0054] In this embodiment, the comparative analysis module compares and analyzes the extracted spectrum features with their changes over time or in the use cycle, and establishes the propagation attenuation model and spectrum drift model of the ultrasonic wave in the sealing ring according to the material and structural characteristics of the sealing ring. By comparing the spectrum information collected at different times, the attenuation and main frequency drift of the ultrasonic wave propagating in the sealing ring are analyzed in detail. As the rubber sealing ring ages, its elastic modulus E and attenuation constant will change, causing the main frequency to shift Or the amplitude attenuation Significant attenuation;

[0055] The specific calculation formula of the elastic modulus is: ,in, represents the density of the sealing ring material, and v represents the propagation speed of ultrasonic waves in the material;

[0056] The specific calculation formula of the attenuation constant is: , where x represents the propagation distance of the ultrasonic wave in the sealing ring, represents the initial signal strength, Indicates the signal strength at frequency f;

[0057] The specific calculation formula for the main frequency offset is: ,in, Indicates the current main frequency. Indicates the initial main frequency;

[0058] The specific calculation formula of the amplitude attenuation is: ,in, represents the initial amplitude, Indicates the current amplitude;

[0059] By using the elastic modulus E and the attenuation constant As input parameters, combined with the use conditions of the seal ring, a prediction model is established to predict the performance degradation of the seal ring under different use conditions; during the aging process of the monitoring seal ring, the hardening or softening of the rubber will cause the elastic modulus E to change, and the attenuation constant will also change accordingly. It is reflected in the changes of ultrasonic signal intensity and main frequency position under frequency. By comparing the spectrum data collected multiple times, the aging progress curve can be obtained. The horizontal axis of the aging progress curve is time, and the vertical axis is the elastic modulus E and the attenuation constant. , the main frequency is offset Or the amplitude attenuation ; Then set the elastic modulus threshold respectively , decay constant threshold , Main frequency deviation threshold And the amplitude attenuation threshold ,like or or or , it is considered that the sealing ring with abnormal sealing state has abnormal current performance state, that is, it is judged that serious aging has occurred or there is a risk of leakage, and the abnormal judgment result is immediately transmitted to the early warning feedback module.

[0060] It should be specifically explained that by comparing the spectrum data collected at different time points, the attenuation of ultrasonic energy is observed. If the attenuation degree increases, it may be a sign of aging of the sealing ring; by monitoring the changes in the ultrasonic main frequency, as the sealing ring ages, the change in its physical properties may cause the main frequency to shift; by comparing historical data with current data, the performance status of the sealing ring is analyzed, and the aging progress curve is drawn. The curve can intuitively show the changing trend of the sealing ring performance; if abnormal signal attenuation is detected, it indicates that the sealing ring material is worn or leaking;

[0061] During the aging process of the sealing ring, ultrasonic signals are collected regularly to analyze the changes in elastic modulus, attenuation constant, main frequency position and amplitude, specifically including: using an ultrasonic sensor to scan the sealing ring at a specific frequency to obtain spectrum data, and performing spectrum analysis on the collected ultrasonic signals to obtain the main frequency position and amplitude; collecting spectrum data of the sealing ring at different time points for multiple times, and drawing an aging progress curve by comparing the spectrum data at different time points, and using time as the horizontal coordinate of the aging progress curve, and using the elastic modulus, attenuation constant, main frequency offset and amplitude attenuation as the vertical coordinate of the aging progress curve;

[0062] To establish the attenuation model of ultrasonic wave propagation in the material, the attenuation characteristics are quantified by the following model:

[0063]

[0064] in, represents the signal strength at frequency f, represents the initial signal strength, x represents the propagation distance of the ultrasonic wave in the sealing ring, The attenuation coefficient at the indicated frequency (varies with rubber aging);

[0065] To establish a spectrum drift model, the spectrum characteristics are quantified by the following model:

[0066] ,in, Indicates the current main frequency. represents the amount of spectrum drift that changes with time, Indicates the initial main frequency.

[0067] Early warning feedback module: Based on early warning of sealing rings with abnormal sealing performance, it displays real-time monitoring results. When aging or leakage risk of the sealing ring is detected, an audible and visual alarm or a network alarm is issued, and the abnormality is recorded.

[0068] In this embodiment, when the early warning feedback module receives an abnormal judgment result, the system will automatically trigger an alarm and pop up a prompt message on the display, prompting the staff to replace or repair the sealing ring with abnormal performance in time, and at the same time record the abnormal time and data for archiving to provide a basis for subsequent maintenance and failure analysis.

[0069] It should be specifically noted that, in order to better illustrate the effectiveness of the present invention, a test pipeline system needs to be selected and used in an actual working environment to ensure the practicability of the test results. A new annular rubber seal is installed through the flange connection of the system, and an ultrasonic detection instrument is prepared and coupled to the flange connection of the pipeline system for non-invasive detection. Before the experiment begins, the ultrasonic detection instrument needs to be calibrated. After the seal is newly installed, the attenuation value and signal strength of the ultrasonic wave at each main frequency point are recorded, and the initial measurement data is recorded in the experimental log as baseline data. At the beginning of the experiment, the seal is kept within the normal operating temperature range, and ultrasonic detection is performed regularly. The current measurement data is compared with the initial data to observe the changes in the attenuation coefficient and signal amplitude, and any increase in the attenuation coefficient and decrease in the signal amplitude are recorded; when the seal ring shows slight signs of aging, the detection frequency is increased, and the offset of the main frequency point and the significant decrease in the signal amplitude are observed and recorded. In the severe aging stage of the seal ring, it is necessary to perform a high-pressure test to detect the sealing performance; after the experiment, it is necessary to analyze the data change trend throughout the cycle, identify the key indicators of seal ring aging, and determine the correlation between the degree of aging and the risk of leakage based on the data analysis results. At the same time, the device is tested a large number of times within the normal operating temperature range, and the following observations are obtained:

[0070] 1. Initial stage (new sealing ring): the attenuation of ultrasonic waves at each main frequency point remains at a stable value, and the signal strength deviation is small;

[0071] 2. Mid-term stage (slight aging): As the rubber microstructure begins to change, the attenuation coefficient near the main frequency increases slightly, and the signal amplitude slowly decreases;

[0072] 3. Late stage (serious aging): The main frequency has obvious deviation and the amplitude has dropped significantly; if the system is under great pressure at this time, it is very easy to leak or fail;

[0073] Comprehensive test data show that the method of the present invention can timely and accurately detect signs of aging of the sealing ring and provide early warning before failure.

[0074] like Figure 3 This embodiment provides a method for analyzing and processing network routing failures, comprising the following steps:

[0075] Step S1: used for real-time monitoring and collection of ultrasonic signals sent and received by the ultrasonic sensor;

[0076] Step S2: Analyze the propagation speed of the ultrasonic signal in the material, and then monitor the propagation state of the ultrasonic signal in the sealing ring in real time by analyzing and comparing the time difference between the transmitted and received signals;

[0077] Step S3: Based on the analysis result of the ultrasonic signal propagation, the sealing defect position is calculated to determine whether the sealing state of the sealing ring is abnormal, and the sealing rings with abnormal sealing state are screened;

[0078] Step S4: Based on the sealing state detection result, the received ultrasonic signal is processed by the signal processing device, and the ultrasonic signal is further converted into spectrum data, so as to collect the spectrum data;

[0079] Step S5: Based on the established attenuation model, the signal processing device compares the analysis result with the historical data or the benchmark data to determine whether the current performance state of the sealing ring with abnormal sealing state has abnormal problems;

[0080] Step S6: Based on the early warning of the sealing ring with abnormal sealing performance, the real-time monitoring results are displayed. When the sealing ring is detected to be aging or leaking, an audible and visual alarm or a network alarm is issued, and the abnormality is recorded.

[0081] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0082] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A rubber sealing ring monitoring and early warning system based on ultrasonic conduction, characterized in that: include: Signal monitoring module: used for real-time monitoring and collection of ultrasonic signals sent and received by the ultrasonic sensor, including a signal sending unit and a signal receiving unit, and transmitting the received ultrasonic signals to the signal analysis module; Signal analysis module: used to analyze the propagation speed of ultrasonic signals in the material, and then monitor the propagation state of ultrasonic signals in the sealing ring in real time by analyzing and comparing the time difference between the transmitted and received signals, and transmit the analysis results of signal propagation to the sealing state detection module; Sealing status detection module: Based on the analysis results of ultrasonic signal propagation, the sealing defect position is calculated to determine whether the sealing status of the sealing ring is abnormal, and the sealing rings with abnormal sealing status are screened; Spectrum data acquisition module: Based on the sealing state detection result, the received ultrasonic signal is processed by the signal processing device, and the ultrasonic signal is further converted into spectrum data, so as to collect the spectrum data; Comparative analysis module: Based on the established attenuation model of the signal processing device, the analysis result is compared with the historical data or the benchmark data to determine whether the current performance state of the sealing ring with abnormal sealing state has abnormal problems; Early warning feedback module: Based on early warning of sealing rings with abnormal sealing performance, it displays real-time monitoring results. When aging or leakage risk of the sealing ring is detected, an audible and visual alarm or a network alarm is issued, and the abnormality is recorded.

2. The rubber sealing ring monitoring and early warning system based on ultrasonic conduction according to claim 1 is characterized in that: The signal monitoring module is configured by installing ultrasonic transducers on the pipes on both sides of the sealing ring, including a transmitting end and a receiving end, transmitting ultrasonic waves through the sealing ring, periodically emitting ultrasonic waves through the transmitting end transducer, and synchronously collecting signals by the receiving end. The signal sending unit is used to monitor and collect the ultrasonic pulses and pulse emission time emitted by the ultrasonic transducer transmitting end, and the signal receiving unit is used to monitor and collect the ultrasonic signals transmitted by the sealing ring and the signal receiving time received by the ultrasonic transducer receiving end.

3. The rubber sealing ring monitoring and early warning system based on ultrasonic conduction according to claim 2 is characterized in that: The signal analysis module first calculates the propagation speed of ultrasound in the material , where x represents the propagation distance of the ultrasonic wave in the sealing ring, and t represents the propagation time; then calculate the time difference between the transmitted and received signals ,in, Indicates the time when the signal is received. Indicates the time when the pulse is emitted.

4. The rubber sealing ring monitoring and early warning system based on ultrasonic conduction according to claim 3 is characterized in that: The sealing state detection module is based on the propagation speed v of ultrasonic waves in the material and the time difference between the transmission and reception signals. To calculate the sealing defect position, the sealing state of the sealing ring is detected according to the sealing defect position, so as to determine whether there is an abnormality in the sealing state; the specific calculation formula for the sealing defect position is: If the calculated sealing defect position y exceeds the preset normal range of the sealing ring, it is judged that the sealing state of the sealing ring is abnormal, and the sealing ring with abnormal sealing state at this time is screened out.

5. The rubber sealing ring monitoring and early warning system based on ultrasonic conduction according to claim 4 is characterized in that: The spectrum data acquisition module processes the received ultrasonic signal based on the signal processing device, so as to collect the spectrum data of the screened sealing ring with abnormal sealing status, and performs A / D conversion on the received ultrasonic signal of the sealing ring with abnormal sealing status through the signal processing device, and then performs fast Fourier transform (FFT) after obtaining the time domain signal to extract the spectrum characteristics, including amplitude, phase and main frequency distribution.

6. The rubber sealing ring monitoring and early warning system based on ultrasonic conduction according to claim 5 is characterized in that: The comparative analysis module compares and analyzes the extracted spectrum features with their changes over time or in the use cycle. According to the material and structural characteristics of the sealing ring, the propagation attenuation model and spectrum drift model of the ultrasonic wave in it are established respectively. By comparing the spectrum information collected at different times, the attenuation and main frequency drift of the ultrasonic wave propagation in the sealing ring are analyzed in detail. As the rubber sealing ring ages, its elastic modulus E and attenuation constant will change, causing the main frequency to shift Or the amplitude attenuation Significant attenuation; The specific calculation formula of the elastic modulus is: ,in, represents the density of the sealing ring material, and v represents the propagation speed of ultrasonic waves in the material; The specific calculation formula of the attenuation constant is: , where x represents the propagation distance of the ultrasonic wave in the sealing ring, represents the initial signal strength, Indicates the signal strength at frequency f; The specific calculation formula for the main frequency offset is: ,in, Indicates the current main frequency. Indicates the initial main frequency; The specific calculation formula of the amplitude attenuation is: ,in, represents the initial amplitude, Indicates the current amplitude; By using the elastic modulus E and the attenuation constant As input parameters, combined with the use conditions of the seal ring, a prediction model is established to predict the performance degradation of the seal ring under different use conditions; during the aging process of the monitoring seal ring, the hardening or softening of the rubber will cause the elastic modulus E to change, and the attenuation constant will also change accordingly. It is reflected in the changes of ultrasonic signal intensity and main frequency position under frequency. By comparing the spectrum data collected multiple times, the aging progress curve can be obtained. The horizontal axis of the aging progress curve is time, and the vertical axis is the elastic modulus E and the attenuation constant. , the main frequency is offset Or the amplitude attenuation ; Then set the elastic modulus threshold respectively , decay constant threshold , Main frequency deviation threshold And the amplitude attenuation threshold ,like or or or , it is considered that the sealing ring with abnormal sealing state has abnormal current performance state, that is, it is judged that serious aging has occurred or there is a risk of leakage, and the abnormal judgment result is immediately transmitted to the early warning feedback module.

7. The rubber sealing ring monitoring and early warning system based on ultrasonic conduction according to claim 6 is characterized in that: When the early warning feedback module receives an abnormal judgment result, the system will automatically trigger an alarm and pop up a prompt message on the display, prompting the staff to replace or repair the sealing ring with abnormal performance in time, and at the same time record the abnormal time and data for archiving to provide a basis for subsequent maintenance and failure analysis.

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