CN119936204A - A rubber sealing ring monitoring and early warning system based on ultrasonic conduction - Google Patents
A rubber sealing ring monitoring and early warning system based on ultrasonic conduction Download PDFInfo
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Abstract
本发明涉及管道连接处理领域，且公开了一种基于超声波传导的橡胶密封圈监测预警系统，包括信号监测模块、信号分析模块、密封状态检测模块、频谱数据采集模块、对比分析模块以及预警反馈模块，通过分析超声波信号在材料中的传播速度和比较发射和接收信号的时间差，计算密封缺陷位置，从而检测和筛选密封状态存在异常的密封圈，通过对筛选出的密封圈进行二次分析，通过采集超声波信号中的频谱数据，与历史数据或基准数据进行比对，以判断密封状态不正常的密封圈当前性能状态是否出现异常问题，并进行预警，可实现对密封圈老化程度与泄漏风险的连续检测，有利于及早的发现密封圈性能异常问题，能够有效提升密封性能监测的精确度和可靠性。
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, comprising a signal monitoring module, a signal analysis module, a sealing state detection module, a spectrum data acquisition module, a comparison analysis module and an early warning feedback module. The system calculates the sealing defect position by analyzing the propagation speed of the ultrasonic signal in the material and comparing the time difference between the transmitted and received signals, thereby detecting and screening the sealing rings with abnormal sealing states. The screened sealing rings are subjected to secondary analysis, and the spectrum data in the ultrasonic signal is collected and 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, and issue an early warning. The system can realize continuous detection of the aging degree and leakage risk of the sealing ring, 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.
Description
Technical Field
The invention relates to the technical field of pipeline connection processing, in particular to a rubber sealing ring monitoring and early warning system based on ultrasonic conduction.
Background
In the pipeline connecting device, the sealing ring is a key component for guaranteeing the sealing performance of the pipeline. Rubber seals are widely used in flange applications because of their good elasticity and sealing properties. However, in the long-term use process of the rubber sealing ring, due to factors such as environmental influence, frequent start and stop, chemical corrosion, temperature change and the like, aging, hardening or softening easily occurs, so that the sealing performance is reduced, and the leakage of a pipeline is caused. In addition, in some fields with extremely high safety requirements (such as aerospace, chemical industry and the like), leakage can cause serious disastrous accidents and immeasurable losses, so that the real-time monitoring and early warning of the state of the sealing ring are of great significance. The existing sealing ring tightness detection technology still lacks continuous detection, so that the problem of abnormal sealing ring performance cannot be found early, and the detection of the sealing state of the sealing ring is difficult, and the fine state change of the sealing ring cannot be accurately captured, so that the method for detecting the aging of the rubber sealing ring and the leakage risk caused by the aging of the rubber sealing ring based on accurate quantification and real-time monitoring is still lacking at present.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a rubber sealing ring monitoring and early warning system based on ultrasonic conduction, which solves the problems in the prior art.
The invention provides a rubber sealing ring monitoring and early warning system based on ultrasonic conduction, which comprises the following components:
The signal monitoring module is used for monitoring and collecting ultrasonic signals sent and received by the ultrasonic sensor in real time, comprises a signal sending unit and a signal receiving unit, and transmits the received ultrasonic signals to the signal analysis module;
The signal analysis module is used for analyzing the propagation speed of the ultrasonic signal in the material, monitoring the propagation state of the ultrasonic signal in the sealing ring in real time by analyzing and comparing the time difference of the transmitted and received signals, and transmitting the analysis result of the signal propagation to the sealing state detection module;
the sealing state detection module is used for calculating the position of the sealing defect based on the analysis result of ultrasonic signal transmission to judge whether the sealing state of the sealing ring is abnormal or not and screening the sealing ring with abnormal sealing state;
The frequency spectrum data acquisition module is used for processing the received ultrasonic signals through the signal processing device based on the detection result of the sealing state, and further converting the frequency spectrum data of the ultrasonic signals so as to acquire the frequency spectrum data;
The comparison analysis module is used for comparing the analysis result with historical data or reference data based on the signal processing device according to the established attenuation model so as to judge whether the current performance state of the sealing ring with abnormal sealing state has abnormal problems or not;
and the early warning feedback module is used for early warning based on the sealing ring with abnormal sealing performance, displaying a real-time monitoring result, sending out an audible and visual alarm or a network alarm when detecting that the sealing ring is aged or leaked at risk, and recording abnormality.
Preferably, the signal monitoring module is used for respectively installing ultrasonic transducers on pipe fittings on two sides of the sealing ring, and comprises a transmitting end and a receiving end, ultrasonic waves are transmitted through the sealing ring, ultrasonic waves are periodically sent out through the transmitting end transducer, signals are synchronously collected by the receiving end, the signal sending unit is used for monitoring and collecting ultrasonic pulses and pulse transmitting time transmitted by the transmitting end of the ultrasonic transducers, and the signal receiving unit is used for monitoring and collecting ultrasonic signals and signal receiving time transmitted by the sealing ring and received by the receiving end of the ultrasonic transducers.
Preferably, the signal analysis module calculates the propagation velocity of ultrasonic waves in the material by first calculating the propagation velocity of ultrasonic waves in the materialWherein x represents the propagation distance of ultrasonic wave in the sealing ring, t represents the propagation time, and the time difference between the transmitted and received signals is calculated, wherein,Indicating the time at which the signal was received,Indicating the time of pulse emission.
Preferably, the sealing state detection module is based on the propagation velocity v of ultrasonic waves in the material and the time difference between the transmitted and received signalsCalculating the position of the sealing defect, detecting the sealing state of the sealing ring according to the position of the sealing defect, and judging whether the sealing state has abnormal conditions or not, wherein the specific calculation formula for the position of the sealing defect is as followsIf the calculated sealing defect position y exceeds the preset normal range of the sealing ring, judging that the sealing state of the sealing ring is abnormal, and screening out the sealing ring with the abnormal sealing state at the moment.
Preferably, the spectrum data acquisition module processes the received ultrasonic signal based on the signal processing device, so as to acquire the screened spectrum data of the 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 a time domain signal, so as to extract spectrum characteristics including amplitude, phase and main frequency distribution.
Preferably, the comparison analysis module compares the extracted spectrum characteristics with the change conditions of the extracted spectrum characteristics in time or use period, establishes a propagation attenuation model and a spectrum drift model of ultrasonic waves in the comparison analysis module respectively according to the material and structural characteristics of the sealing ring, and mainly analyzes the attenuation and main frequency drift of the propagation of the ultrasonic waves in the sealing ring by comparing the spectrum information acquired at different moments, and the elastic modulus E and the attenuation constant of the rubber sealing ring are aged along with the aging of the rubber sealing ringWill change, resulting in a shift of the dominant frequencyOr amplitude attenuationObvious attenuation;
The specific calculation formula of the elastic modulus is as follows , wherein,Representing the density of the sealing ring material, v representing the propagation speed of ultrasonic waves in the material;
The specific calculation formula of the attenuation constant is that Wherein x represents the propagation distance of ultrasonic waves in the sealing ring,Indicating the initial signal strength of the signal,Representing the signal strength at frequency f;
the specific calculation formula of the main frequency deviation is that , wherein,Representing the current dominant frequency of the signal,Representing an initial dominant frequency;
The specific calculation formula of the amplitude attenuation is that , wherein,Indicating the initial amplitude value of the signal,Representing the current amplitude;
By using the modulus of elasticity E and the damping constant As input parameters, combining the use conditions of the sealing ring, building a prediction model to predict the performance degradation condition of the sealing ring under different use conditions, monitoring the elastic modulus E change caused by rubber hardening or softening in the aging process of the sealing ring, changing the attenuation constant along with the elastic modulus E change,The method is characterized in that the change of the signal intensity and the main frequency position of ultrasonic waves under the frequency is reflected, an aging progress curve can be obtained by comparing spectrum data acquired for multiple times, and the abscissa of the aging progress curve is time, and the ordinate is elastic modulus E and attenuation constantThe main frequency is shiftedOr amplitude attenuationRespectively setting elastic modulus threshold valueThreshold of damping constantShift threshold of dominant frequencyAmplitude decay thresholdIf (if)Or (b)Or (b)Or (b)And considering that the current performance state of the sealing ring with abnormal sealing state has abnormal problem, namely judging that serious aging occurs or leakage risk exists, and immediately transmitting an abnormal judging result to the early warning feedback module.
Preferably, when the early warning feedback module receives an abnormal judgment result, the system automatically triggers an alarm, and pops up prompt information on a display to prompt a worker to replace or maintain the sealing ring with abnormal performance in time, and meanwhile, the abnormal time and the data record are archived, so that a basis is provided for subsequent overhaul and failure analysis.
The invention has the technical effects and advantages that:
According to the invention, the signal monitoring module is arranged for monitoring and collecting ultrasonic signals sent and received by the ultrasonic sensor in real time, the signal analysis module is used for analyzing the propagation speed of the ultrasonic signals in the material and comparing the time difference of the transmitted and received signals, so that the propagation state of the ultrasonic signals in the sealing ring is monitored in real time, the sealing state detection module is used for calculating the sealing defect position to judge whether the sealing state of the sealing ring is abnormal, the sealing ring with abnormal sealing state is screened, the spectrum data in the ultrasonic signals are collected through the spectrum data collection module, the analysis result is compared with the historical data or the reference data through the comparison analysis module to judge whether the current performance state of the sealing ring with abnormal sealing state is abnormal, the early warning feedback module is used for early warning the sealing ring with abnormal sealing performance, the real-time monitoring result is displayed, the continuous detection of the aging degree and leakage risk of the sealing ring can be realized through periodical transmission and reception of the ultrasonic signals, the attenuation rule of the ultrasonic waves with different frequencies in the sealing ring can be used for more accurately capturing the tiny performance degradation signals, the abnormal sealing ring performance problem can be effectively improved.
Drawings
Fig. 1 is a block diagram of a system architecture of the present invention.
Fig. 2 is a schematic diagram of a signal processing flow in the present embodiment.
Fig. 3 is a method step diagram of the present embodiment.
Detailed Description
The following will be described in detail and with reference to the drawings, wherein the configurations of the embodiments are merely illustrative, and the rubber seal monitoring and warning system based on ultrasonic conduction according to the present invention is not limited to the configurations of the embodiments, and all other embodiments obtained by a person skilled in the art without making any inventive effort are within the scope of the present invention.
The embodiment as shown in fig. 1 provides a rubber sealing ring monitoring and early warning system based on ultrasonic conduction, which comprises:
the signal monitoring module is used for monitoring and collecting ultrasonic signals sent and received by the ultrasonic sensor in real time, comprises a signal sending unit and a signal receiving unit, and transmits the received ultrasonic signals to the signal analysis module.
In this embodiment, the signal monitoring module is through installing ultrasonic transducer respectively on the pipe fitting of sealing washer both sides, including transmitting end and receiving end, through sealing washer transmission ultrasonic wave, send ultrasonic wave regularly through transmitting end transducer to gather the signal by the receiving end is synchronous, the signal transmission unit is used for monitoring and gathering ultrasonic wave pulse and the pulse transmission time that ultrasonic transducer transmitting end transmitted, the signal receiving unit is used for monitoring and gathering ultrasonic wave signal and the signal reception time of sealing washer propagation that ultrasonic transducer receiving end received.
Specifically, the transmitting end ultrasonic transducer is attached to one side pipe fitting of the flange device, the receiving end ultrasonic transducer is attached to the other side pipe fitting, the transmitting end generates ultrasonic waves in a specific frequency range (such as 20 kHz-2 MHz), and the receiving end is used for receiving ultrasonic signals transmitted by the sealing ring; the transmitting end transmits ultrasonic waves covering the frequency range required to be detected, and after the ultrasonic waves pass through the pipe wall, the rubber sealing ring and the pipe wall, the ultrasonic waves are received by the energy converter of the receiving end to form real-time signal data;
after the ultrasonic transducer equipment is installed, the system is calibrated, which comprises the following steps:
(1) Baseline calibration of ultrasonic transmission and reception;
(2) The sealing ring material characteristics comprise elastic modulus, density and input of relevant parameters of the pipe fitting;
(3) The initial spectrum is measured and recorded.
The signal analysis module is used for analyzing the propagation speed of the ultrasonic signal in the material, monitoring the propagation state of the ultrasonic signal in the sealing ring in real time by analyzing and comparing the time difference of the transmitted and received signals, and transmitting the analysis result of the signal propagation to the sealing state detection module.
In this embodiment, the signal analysis module calculates the propagation velocity of ultrasonic waves in the materialWherein x represents the propagation distance of ultrasonic wave in the sealing ring, t represents the propagation time, and the time difference between the transmitted and received signals is calculated, wherein,Indicating the time at which the signal was received,Indicating the time of pulse emission.
Specifically, the calculated propagation speed is compared with the theoretical propagation speed, if the calculated propagation speed is consistent with the theoretical propagation speed, the material and the structure of the sealing ring are not changed significantly, if the time difference is consistent with the expected propagation time, the propagation of the ultrasonic signal in the sealing ring is not hindered, and if the time difference is increased, the defect such as leakage or damage exists in the sealing ring, so that the ultrasonic propagation path is prolonged.
And the sealing state detection module is used for calculating the position of the sealing defect based on the analysis result of ultrasonic signal transmission to judge whether the sealing state of the sealing ring is abnormal or not and screening the sealing ring with abnormal sealing state.
In this embodiment, the sealing state detection module is based on the propagation velocity v of ultrasonic waves in the material and the time difference between the transmitted and received signalsCalculating the position of the sealing defect, detecting the sealing state of the sealing ring according to the position of the sealing defect, and judging whether the sealing state has abnormal conditions or not, wherein the specific calculation formula for the position of the sealing defect is as followsIf the calculated sealing defect position y exceeds the preset normal range of the sealing ring, judging that the sealing state of the sealing ring is abnormal, and screening out the sealing ring with the abnormal sealing state at the moment.
It should be specifically noted that, for determining the preset normal range value of the sealing ring, the maximum transmission distance of the ultrasonic wave in the sealing ring is determined according to the size of the sealing ringTaking into account errors and safety requirements in practical applications, the maximum propagation distance is requiredA safety range is set based on (a), for example, the safety range can be set as, wherein,Represents a safety factor, andThe normal range value is then determined, and the normal range should be the distance range over which the ultrasonic wave propagates without defects, e.g., if the seal ring length is L, the normal range may be set to, wherein,Representing the defect tolerance coefficient, the specific value is determined according to the design requirement, and is based on the calculated sealing defect bit y and the normal range valueComparing to judge whether the sealing state of the sealing ring is normal, if y If the sealing state is considered normal, the sealing state of the sealing ring is continuously monitored, if y If the sealing state is abnormal, the sealing ring is required to be screened out;
Assuming that the propagation velocity v of ultrasonic waves in the sealing ring material is 5900 The length L of the sealing ring is 100mm, the safety coefficient is 0.9, the defect tolerance coefficient is 0.95, and the normal range is providedThe method can be set as follows: If the calculated defect position y exceeds 95mm, the sealing state of the sealing ring is considered to be abnormal;
By combining the analysis results of the propagation speed and the time difference, the sealing state of the sealing ring can be judged more accurately, and if the propagation speed is reduced and the time difference is increased, the sealing ring possibly has abnormality.
And the spectrum data acquisition module is used for processing the received ultrasonic signals through the signal processing device based on the sealing state detection result and further converting the spectrum data of the ultrasonic signals so as to acquire the spectrum data.
In this embodiment, the spectrum data acquisition module processes the received ultrasonic signal based on the signal processing device, so as to acquire the screened spectrum data of the 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 a time domain signal, so as to extract spectrum characteristics including amplitude, phase and main frequency distribution.
Specifically, the signal processing device receives the ultrasonic signal captured by the transducer and then converts the signal into a digital signal through the a/D converter at a certain sampling rate (such as tens of thousands or millions of samples per second), the digital signal processor pre-processes the signal, such as applying a band-pass filter to preserve the signal in a specific frequency range, and performs FFT on the pre-processed signal to obtain a frequency spectrum of the signal, so as to analyze the FFT result, and extract spectral characteristics such as amplitude, phase and dominant frequency distribution.
Fig. 2 shows the flow of ultrasonic signal processing according to the present embodiment:
generating an ultrasonic signal with variable frequency by a signal processor;
The signal amplification and transmission, namely enhancing the generated ultrasonic signal through a signal amplifier, transmitting the ultrasonic signal to a transducer, and converting the electric signal into ultrasonic waves;
Signal propagation and reflection, namely, ultrasonic wave propagates in a medium and is reflected back when encountering an object;
The receiving transducer converts the reflected ultrasonic wave into an electric signal;
Signal processing and analysis, namely processing and analyzing the electric signals through a signal processing unit and extracting useful information.
And the comparison analysis module is used for comparing the analysis result with historical data or reference data based on the signal processing device according to the established attenuation model so as to judge whether the current performance state of the sealing ring with abnormal sealing state has an abnormal problem or not.
In this embodiment, the comparison analysis module compares the extracted spectral characteristics with the changes of the extracted spectral characteristics in time or the usage period, establishes a propagation attenuation model and a spectral drift model of ultrasonic waves in the sealing ring according to the material and structural characteristics of the sealing ring, and performs comparison on the spectral information acquired at different moments to mainly analyze the attenuation and main frequency drift of the propagation of the ultrasonic waves in the sealing ring, and the elastic modulus E and the attenuation constant of the sealing ring are improved along with the aging of the rubber sealing ringWill change, resulting in a shift of the dominant frequencyOr amplitude attenuationObvious attenuation;
The specific calculation formula of the elastic modulus is as follows , wherein,Representing the density of the sealing ring material, v representing the propagation speed of ultrasonic waves in the material;
The specific calculation formula of the attenuation constant is that Wherein x represents the propagation distance of ultrasonic waves in the sealing ring,Indicating the initial signal strength of the signal,Representing the signal strength at frequency f;
the specific calculation formula of the main frequency deviation is that , wherein,Representing the current dominant frequency of the signal,Representing an initial dominant frequency;
The specific calculation formula of the amplitude attenuation is that , wherein,Indicating the initial amplitude value of the signal,Representing the current amplitude;
By using the modulus of elasticity E and the damping constant As input parameters, combining the use conditions of the sealing ring, building a prediction model to predict the performance degradation condition of the sealing ring under different use conditions, monitoring the elastic modulus E change caused by rubber hardening or softening in the aging process of the sealing ring, changing the attenuation constant along with the elastic modulus E change,The method is characterized in that the change of the signal intensity and the main frequency position of ultrasonic waves under the frequency is reflected, an aging progress curve can be obtained by comparing spectrum data acquired for multiple times, and the abscissa of the aging progress curve is time, and the ordinate is elastic modulus E and attenuation constantThe main frequency is shiftedOr amplitude attenuationRespectively setting elastic modulus threshold valueThreshold of damping constantShift threshold of dominant frequencyAmplitude decay thresholdIf (if)Or (b)Or (b)Or (b)And considering that the current performance state of the sealing ring with abnormal sealing state has abnormal problem, namely judging that serious aging occurs or leakage risk exists, and immediately transmitting an abnormal judging result to the early warning feedback module.
The method specifically needs to be described, the attenuation condition of ultrasonic energy is observed through comparing the frequency spectrum data acquired at different time points, if the attenuation degree is aggravated, the attenuation condition is possibly the sign of aging of the sealing ring, the physical property change of the sealing ring can cause the deviation of the main frequency along with the aging of the sealing ring through monitoring the change of the main frequency of the ultrasonic wave, the performance state of the sealing ring is analyzed through comparing historical data with current data, an aging progress curve is drawn, the change trend of the performance of the sealing ring can be intuitively seen through the curve, and if the attenuation abnormality of a signal is detected, the occurrence of abrasion or leakage condition of the sealing ring material is indicated;
In the aging process of the sealing ring, periodically collecting ultrasonic signals and analyzing the changes of the elastic modulus, the attenuation constant, the main frequency position and the amplitude, wherein the method specifically comprises the steps of using an ultrasonic sensor to scan the sealing ring at a specific frequency to obtain frequency spectrum data, and carrying out frequency spectrum analysis on the collected ultrasonic signals to obtain the main frequency position and the amplitude;
for modeling the attenuation of the propagation of an ultrasonic wave in a material, the attenuation characteristics are quantified by the following model:
Wherein, Representing the signal strength at the frequency f,Indicating the initial signal strength, x indicating the propagation distance of the ultrasonic wave in the sealing ring,Represents the attenuation coefficient at frequency (as a function of rubber aging);
For establishing a spectral drift model, the spectral features are quantized by the following model:
, wherein, Representing the current dominant frequency of the signal,Indicating the amount of spectral drift over time,Representing the initial dominant frequency.
And the early warning feedback module is used for early warning based on the sealing ring with abnormal sealing performance, displaying a real-time monitoring result, sending out an audible and visual alarm or a network alarm when detecting that the sealing ring is aged or leaked at risk, and recording abnormality.
In this embodiment, when the early warning feedback module receives the abnormal judgment result, the system will automatically trigger an alarm, pop up a prompt message on the display, prompt the staff to replace or maintain the sealing ring with abnormal performance in time, and archive the abnormal time and the data record, thereby providing a basis for subsequent overhaul and failure analysis.
The invention is characterized in that, in order to better explain the effectiveness of the invention, a pipeline system for testing is required to be selected and used in the actual working environment to ensure the practicability of the test result, a new annular rubber sealing ring is installed at the flange joint of the system, an ultrasonic detection instrument is prepared and coupled with the flange joint of the pipeline system so as to carry out non-invasive detection, before the experiment starts, the ultrasonic detection instrument is required to be calibrated, after the sealing ring is newly installed, the attenuation value and the signal intensity of ultrasonic waves at each main frequency point are recorded, initial measurement data are recorded in an experiment log and used as baseline data, the sealing ring is kept in a normal working temperature range at the beginning of the experiment, ultrasonic detection is carried out periodically, the current measurement data and the initial data are compared, the change of the attenuation coefficient and the signal amplitude is observed, the increase of any attenuation coefficient and the decrease of the signal amplitude are recorded, when the sealing ring has slight aging signs, the detection frequency is increased, the deviation condition of the main frequency point and the significant decrease of the signal amplitude are observed, and the ultrasonic detection instrument is required to be subjected to high-pressure test in the serious aging stage of the sealing ring, so that the leakage performance is detected, and the whole sealing ring is required to be detected within the period of the normal working temperature range is detected, and the leakage is required to be analyzed according to the following period, and the normal working period is determined, and the change of the test results are detected, and the normal period is required to be analyzed, and the normal and the test results are detected and the normal period is detected and the test results are determined and the normal.
1. In the initial stage (new sealing ring), the attenuation of the ultrasonic wave at each main frequency point is kept at a stable value, and the signal intensity deviation is small;
2. In the middle stage (slight aging), as the microstructure of the rubber starts to change, the attenuation coefficient near the main frequency is slightly increased, and the signal amplitude slowly decreases;
3. In the later stage (serious aging), the main frequency is obviously deviated, the amplitude is obviously reduced, and if the system bears larger pressure at the moment, the leakage or the fault is extremely easy to occur;
comprehensive test data show that the method can timely and accurately detect the aging signs of the sealing ring and provide early warning before failure.
As shown in fig. 3, the present embodiment provides a network route fault analysis processing method, which includes the following steps:
Step S1, monitoring and collecting ultrasonic signals sent and received by an ultrasonic sensor in real time;
S2, analyzing the propagation speed of the ultrasonic signal in the material, and monitoring the propagation state of the ultrasonic signal in the sealing ring in real time by analyzing and comparing the time difference of the transmitted signal and the received signal;
Step S3, calculating the position of the sealing defect based on the analysis result of ultrasonic signal transmission to judge whether the sealing state of the sealing ring is abnormal or not, and screening the sealing ring with abnormal sealing state;
step S4, based on the sealing state detection result, processing the received ultrasonic signals through a signal processing device, and further performing frequency spectrum data conversion on the ultrasonic signals so as to acquire frequency spectrum data;
S5, comparing an analysis result with historical data or reference data based on the signal processing device according to the established attenuation model to judge whether an abnormal problem occurs in the current performance state of the sealing ring with an abnormal sealing state;
And S6, based on early warning of the sealing ring with abnormal sealing performance, displaying a real-time monitoring result, sending out an audible and visual alarm or a network alarm when detecting that the sealing ring is aged or leaked, and recording abnormality.
Finally, the foregoing description of the preferred embodiment of the invention is provided for the purpose of illustration only, and is not intended to limit the invention to the particular form disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.
The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (7)
1. Rubber seal monitoring and early warning system based on ultrasonic conduction, its characterized in that includes:
The signal monitoring module is used for monitoring and collecting ultrasonic signals sent and received by the ultrasonic sensor in real time, comprises a signal sending unit and a signal receiving unit, and transmits the received ultrasonic signals to the signal analysis module;
The signal analysis module is used for analyzing the propagation speed of the ultrasonic signal in the material, monitoring the propagation state of the ultrasonic signal in the sealing ring in real time by analyzing and comparing the time difference of the transmitted and received signals, and transmitting the analysis result of the signal propagation to the sealing state detection module;
the sealing state detection module is used for calculating the position of the sealing defect based on the analysis result of ultrasonic signal transmission to judge whether the sealing state of the sealing ring is abnormal or not and screening the sealing ring with abnormal sealing state;
The frequency spectrum data acquisition module is used for processing the received ultrasonic signals through the signal processing device based on the detection result of the sealing state, and further converting the frequency spectrum data of the ultrasonic signals so as to acquire the frequency spectrum data;
The comparison analysis module is used for comparing the analysis result with historical data or reference data based on the signal processing device according to the established attenuation model so as to judge whether the current performance state of the sealing ring with abnormal sealing state has abnormal problems or not;
and the early warning feedback module is used for early warning based on the sealing ring with abnormal sealing performance, displaying a real-time monitoring result, sending out an audible and visual alarm or a network alarm when detecting that the sealing ring is aged or leaked at risk, and recording abnormality.
2. The rubber sealing ring monitoring and early warning system based on ultrasonic conduction according to claim 1, wherein the signal monitoring module is characterized in that ultrasonic transducers are respectively installed on pipe fittings on two sides of a sealing ring and comprise a transmitting end and a receiving end, ultrasonic waves are transmitted through the sealing ring, the ultrasonic waves are periodically sent out through the transmitting end transducer, signals are synchronously collected by the receiving end, the signal sending unit is used for monitoring and collecting ultrasonic pulses and pulse transmitting time emitted by the transmitting end of the ultrasonic transducer, and the signal receiving unit is used for monitoring and collecting ultrasonic signals and signal receiving time which are transmitted by the sealing ring and are received by the receiving end of the ultrasonic transducer.
3. The ultrasonic conduction-based rubber seal monitoring and early warning system according to claim 2, wherein the signal analysis module calculates the propagation speed of ultrasonic waves in the materialWherein x represents the propagation distance of ultrasonic wave in the sealing ring, t represents the propagation time, and the time difference between the transmitted and received signals is calculated, wherein,Indicating the time at which the signal was received,Indicating the time of pulse emission.
4. The ultrasonic conduction-based rubber seal monitoring and early warning system according to claim 3, wherein the sealing state detection module is based on the propagation velocity v of ultrasonic waves in a material and the time difference between the transmitted and received signalsCalculating the position of the sealing defect, detecting the sealing state of the sealing ring according to the position of the sealing defect, and judging whether the sealing state has abnormal conditions or not, wherein the specific calculation formula for the position of the sealing defect is as followsIf the calculated sealing defect position y exceeds the preset normal range of the sealing ring, judging that the sealing state of the sealing ring is abnormal, and screening out the sealing ring with the abnormal sealing state at the moment.
5. The monitoring and early warning system for the rubber sealing ring based on ultrasonic conduction according to claim 4, wherein the frequency spectrum data acquisition module processes the received ultrasonic signal based on the signal processing device, so as to acquire the frequency spectrum data of the 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, so as to obtain a time domain signal, and then performs Fast Fourier Transform (FFT), thereby extracting frequency spectrum characteristics including amplitude, phase and main frequency distribution.
6. The ultrasonic conduction-based rubber seal ring monitoring and early warning system according to claim 5, characterized in that the comparison analysis module compares the extracted spectral characteristics with the change conditions of the extracted spectral characteristics in time or use period, establishes a propagation attenuation model and a spectral drift model of ultrasonic waves in the sealing ring according to the material and structural characteristics of the sealing ring, and mainly analyzes attenuation and main frequency drift of the propagation of the ultrasonic waves in the sealing ring by comparing the spectral information acquired at different moments, wherein the elastic modulus E and the attenuation constant of the rubber seal ring are aged along with the aging of the rubber seal ringWill change, resulting in a shift of the dominant frequencyOr amplitude attenuationObvious attenuation;
The specific calculation formula of the elastic modulus is as follows , wherein,Representing the density of the sealing ring material, v representing the propagation speed of ultrasonic waves in the material;
The specific calculation formula of the attenuation constant is that Wherein x represents the propagation distance of ultrasonic waves in the sealing ring,Indicating the initial signal strength of the signal,Representing the signal strength at frequency f;
the specific calculation formula of the main frequency deviation is that , wherein,Representing the current dominant frequency of the signal,Representing an initial dominant frequency;
The specific calculation formula of the amplitude attenuation is that , wherein,Indicating the initial amplitude value of the signal,Representing the current amplitude;
By using the modulus of elasticity E and the damping constant As input parameters, combining the use conditions of the sealing ring, building a prediction model to predict the performance degradation condition of the sealing ring under different use conditions, monitoring the elastic modulus E change caused by rubber hardening or softening in the aging process of the sealing ring, changing the attenuation constant along with the elastic modulus E change,The method is characterized in that the change of the signal intensity and the main frequency position of ultrasonic waves under the frequency is reflected, an aging progress curve can be obtained by comparing spectrum data acquired for multiple times, and the abscissa of the aging progress curve is time, and the ordinate is elastic modulus E and attenuation constantThe main frequency is shiftedOr amplitude attenuationRespectively setting elastic modulus threshold valueThreshold of damping constantShift threshold of dominant frequencyAmplitude decay thresholdIf (if)Or (b)Or (b)Or (b)And considering that the current performance state of the sealing ring with abnormal sealing state has abnormal problem, namely judging that serious aging occurs or leakage risk exists, and immediately transmitting an abnormal judging result to the early warning feedback module.
7. The rubber sealing ring monitoring and early warning system based on ultrasonic conduction according to claim 6, wherein the early warning feedback module automatically triggers an alarm when an abnormal judgment result is received, and pops up prompt information on a display to prompt a worker to replace or maintain the sealing ring with abnormal performance in time, and simultaneously archives abnormal time and data records, thereby providing basis for subsequent overhaul and failure analysis.
Priority Applications (1)
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| CN120121236A (en) * | 2025-05-14 | 2025-06-10 | 泰安大陆医疗器械有限公司 | Actuator sealing test method and system |
| CN120595030A (en) * | 2025-08-06 | 2025-09-05 | 太原龙为电子科技有限公司 | Power distribution network ground fault positioning method and system |
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