High-temperature hydrogen corrosion identification method based on multi-sensor fusion and related device

Abstract

The invention discloses a high-temperature hydrogen corrosion identification method based on multi-sensor fusion and a related device, and relates to the technical field of safety monitoring of high-temperature hydrogen-related equipment. The method comprises the following steps: acquiring methane concentration, hydrogen concentration, temperature and pressure at a current sampling moment; based on the methane concentration at the latest m-1 sampling moments before the current sampling moment and the methane concentration at the current sampling moment, calculating to obtain the methane concentration change rate at the current sampling moment, judging whether the methane concentration change rate at the current sampling moment is greater than 0, if so, determining that high-temperature hydrogen corrosion occurs, and if not, determining that high-temperature hydrogen corrosion occurs. If yes, based on the hydrogen concentration, temperature and pressure at the current sampling moment, calculating to obtain a high-temperature hydrogen corrosion sensitivity factor at the current sampling moment, and further determining the probability of high-temperature hydrogen corrosion. Real-time monitoring and early refined recognition of high-temperature hydrogen corrosion can be achieved, and the method has great significance in improving the safety and reliability of high-temperature hydrogen related equipment.

Description

Technical Field

[0001] The present application relates to the technical field of safety monitoring of high-temperature hydrogen-related equipment, and particularly to a method for identifying high-temperature hydrogen corrosion based on multi-sensor fusion and related devices. Background Art

[0002] High-temperature hydrogen-related equipment refers to equipment used for the production, storage, transportation, and use of hydrogen under high-temperature conditions, such as ammonia synthesis towers, high-temperature solid oxide electrolysis hydrogen production devices, etc. During the operation of high-temperature hydrogen-related equipment, the high-temperature environment poses severe challenges to the performance of equipment materials. High-temperature damage (such as creep, thermal fatigue, oxidation, etc.) is one of the main reasons for equipment failure, and in particular, high-temperature hydrogen corrosion is a high-temperature damage that should be focused on.

[0003] Traditional methods for identifying high-temperature hydrogen corrosion often rely on regular shutdown inspections, which not only affect production efficiency but also make it difficult to capture the early signs of this damage. Therefore, developing a technology that can monitor and identify high-temperature hydrogen corrosion in real time under high-temperature conditions is of great significance for improving the safety and reliability of high-temperature hydrogen-related equipment. Summary of the Invention

[0004] The purpose of the present application is to provide a method for identifying high-temperature hydrogen corrosion based on multi-sensor fusion and related devices, which can achieve real-time monitoring and early refined identification of high-temperature hydrogen corrosion, and is of great significance for improving the safety and reliability of high-temperature hydrogen-related equipment.

[0005] To achieve the above purpose, the present application provides the following solutions:

[0006] In a first aspect, the present application provides a method for identifying high-temperature hydrogen corrosion based on multi-sensor fusion. The method for identifying high-temperature hydrogen corrosion based on multi-sensor fusion includes:

[0007] Obtain the methane concentration, hydrogen concentration, temperature, and pressure at the current sampling moment; the methane concentration is collected by a methane sensor installed at a first position on the outer wall of the high-temperature hydrogen-related equipment, and the hydrogen concentration, temperature, and pressure are respectively collected by a hydrogen sensor, a temperature sensor, and a pressure sensor installed at a second position on the inner wall of the high-temperature hydrogen-related equipment, and the first position and the second position correspond to each other;

[0008] Based on the methane concentration at the latest m - 1 sampling moments before the current sampling moment and the methane concentration at the current sampling moment, calculate the methane concentration change rate at the current sampling moment; m is a positive integer greater than 1;

[0009] Determine whether the change rate of methane concentration at the current sampling moment is greater than 0; if so, determine that high-temperature hydrogen corrosion occurs at the second position; if not, calculate the high-temperature hydrogen corrosion sensitivity factor at the current sampling moment based on the hydrogen concentration, temperature, and pressure at the current sampling moment, and determine the probability of high-temperature hydrogen corrosion occurring at the second position based on the high-temperature hydrogen corrosion sensitivity factor at the current sampling moment.

[0010] Optionally, the second position is a high-risk part on the high-temperature hydrogen-related equipment, and the high-risk part is a part prone to high-temperature hydrogen corrosion determined based on the risk assessment analysis result obtained from the risk assessment analysis of the high-temperature hydrogen-related equipment.

[0011] Optionally, based on the methane concentrations at the latest m - 1 sampling moments before the current sampling moment and the methane concentration at the current sampling moment, calculate the change rate of methane concentration at the current sampling moment, specifically including:

[0012] Calculate the initial change rate at the current sampling moment based on the methane concentrations at the latest m - 1 sampling moments before the current sampling moment and the methane concentration at the current sampling moment;

[0013] Add the sensor measurement error to the initial change rate to calculate the change rate of methane concentration at the current sampling moment.

[0014] Optionally, based on the methane concentrations at the latest m - 1 sampling moments before the current sampling moment and the methane concentration at the current sampling moment, calculate the initial change rate at the current sampling moment, specifically including:

[0015] Calculate the mean and standard deviation of the methane concentrations at the latest m - 1 sampling moments before the current sampling moment and the methane concentration at the current sampling moment to obtain the mean and standard deviation at the current sampling moment;

[0016] Calculate the initial change rate at the current sampling moment based on the methane concentration, mean, and standard deviation at the current sampling moment;

[0017] The calculation formula for the initial change rate is:

[0018]

[0019] Among them, ΔC(n) is the initial change rate at the current sampling moment n; C n is the methane concentration at the current sampling moment n; μ m (n) is the mean at the current sampling moment n; σ m (n) is the standard deviation at the current sampling moment n.

[0020] Optionally, the calculation formula for the change rate of methane concentration is:

[0021]

[0022] Among them, is the methane concentration change rate at the current sampling time n; C n is the methane concentration at the current sampling time n; μ m (n) is the mean value at the current sampling time n; σ m (n) is the standard deviation at the current sampling time n; σ ∈ is the standard deviation of the sensor measurement error at the current sampling time n, which is equal to the standard deviation of the methane concentration at all sampling times between the start sampling time and the previous sampling time of the current sampling time.

[0023] Optionally, the calculation formula of the high-temperature hydrogen corrosion sensitivity factor is:

[0024]

[0025] Among them, P v is the high-temperature hydrogen corrosion sensitivity factor at the current sampling time; is the hydrogen partial pressure at the current sampling time, is the hydrogen concentration at the current sampling time, P is the pressure at the current sampling time; T is the temperature at the current sampling time; age is the service time of the high-temperature hydrogen-involved equipment.

[0026] Optionally, based on the high-temperature hydrogen corrosion sensitivity factor at the current sampling time, determining the probability of high-temperature hydrogen corrosion occurring at the second position specifically includes:

[0027] Judging whether the high-temperature hydrogen corrosion sensitivity factor at the current sampling time is greater than a first preset value to obtain a first judgment result;

[0028] If the first judgment result is yes, the probability of high-temperature hydrogen corrosion occurring at the second position is the first probability. At this time, it is highly sensitive, and a suggestion to stop the machine for inspection is fed back to the user;

[0029] If the first judgment result is no, then judge whether the high-temperature hydrogen corrosion sensitivity factor at the current sampling time is greater than a second preset value to obtain a second judgment result;

[0030] If the second judgment result is yes, the probability of high-temperature hydrogen corrosion occurring at the second position is the second probability. At this time, it is moderately sensitive, and a suggestion to increase the sampling frequency of the methane sensor, hydrogen sensor, temperature sensor and pressure sensor is fed back to the user;

[0031] If the second judgment result is no, then judge whether the high-temperature hydrogen corrosion sensitivity factor at the current sampling time is greater than a third preset value to obtain a third judgment result;

[0032] If the third judgment result is yes, the probability of high-temperature hydrogen corrosion occurring at the second position is the third probability. At this time, it is of low sensitivity, and a suggestion to continue real-time monitoring is fed back to the user.

[0033] If the third judgment result is no, the probability of high-temperature hydrogen corrosion occurring at the second position is the fourth probability. At this time, it is of no sensitivity, and a feedback of no risk is given to the user, suggesting to continue real-time monitoring.

[0034] Among them, the first preset value, the second preset value, and the third preset value are determined based on the material of the high-temperature hydrogen-related equipment. The first probability is greater than the second probability, the second probability is greater than the third probability, and the third probability is greater than the fourth probability.

[0035] In a second aspect, the present application provides a high-temperature hydrogen corrosion identification device based on multi-sensor fusion. The high-temperature hydrogen corrosion identification device based on multi-sensor fusion includes: a methane sensor, a hydrogen sensor, a temperature sensor, a pressure sensor, and a processor.

[0036] The methane sensor is installed at a first position on the outer wall of the high-temperature hydrogen-related equipment and is used to collect the methane concentration at the current sampling moment.

[0037] The hydrogen sensor is installed at a second position on the inner wall of the high-temperature hydrogen-related equipment and is used to collect the hydrogen concentration at the current sampling moment. The first position corresponds to the second position.

[0038] The temperature sensor is installed at the second position on the inner wall of the high-temperature hydrogen-related equipment and is used to collect the temperature at the current sampling moment.

[0039] The pressure sensor is installed at the second position on the inner wall of the high-temperature hydrogen-related equipment and is used to collect the pressure at the current sampling moment.

[0040] The processor is communicatively connected to the methane sensor, the hydrogen sensor, the temperature sensor, and the pressure sensor respectively, and is used to execute the above-mentioned high-temperature hydrogen corrosion identification method based on multi-sensor fusion.

[0041] In a third aspect, the present application provides a computer device, including: a memory, a processor, and a computer program stored on the memory and executable on the processor. The processor executes the computer program to implement the above-mentioned high-temperature hydrogen corrosion identification method based on multi-sensor fusion.

[0042] In a fourth aspect, the present application provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the above-mentioned high-temperature hydrogen corrosion identification method based on multi-sensor fusion is implemented.

[0043] According to the specific embodiments provided by the present application, the present application has the following technical effects:

[0044] The present application provides a high-temperature hydrogen corrosion identification method and related device based on multi-sensor fusion. It acquires the methane concentration, hydrogen concentration, temperature, and pressure at the current sampling moment. Based on the methane concentration at the latest m - 1 sampling moments before the current sampling moment and the methane concentration at the current sampling moment, it calculates the methane concentration change rate at the current sampling moment, and determines whether the methane concentration change rate at the current sampling moment is greater than 0. If so, it determines that high-temperature hydrogen corrosion has occurred; if not, it calculates the high-temperature hydrogen corrosion sensitivity factor at the current sampling moment based on the hydrogen concentration, temperature, and pressure at the current sampling moment, and determines the probability of high-temperature hydrogen corrosion occurring based on the high-temperature hydrogen corrosion sensitivity factor at the current sampling moment. The present application can collect the methane concentration, hydrogen concentration, temperature, and pressure of high-temperature hydrogen-related equipment, conduct real-time monitoring of high-temperature hydrogen-related equipment, and subsequently identify high-temperature hydrogen corrosion on high-temperature hydrogen-related equipment by comprehensively considering the methane concentration, hydrogen concentration, temperature, and pressure. Due to the comprehensive consideration of the methane concentration, hydrogen concentration, temperature, and pressure, the identification accuracy can be improved. And when it is identified by the methane concentration that high-temperature hydrogen corrosion has not occurred, it will further comprehensively consider the hydrogen concentration, temperature, and pressure to determine the probability of high-temperature hydrogen corrosion occurring, so the identification timeliness can be improved. Therefore, it can achieve real-time monitoring and early refined identification of high-temperature hydrogen corrosion, which is of great significance for improving the safety and reliability of high-temperature hydrogen-related equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the following described drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0046] Figure 1 It is an application environment diagram of a high-temperature hydrogen corrosion identification method based on multi-sensor fusion provided in Embodiment 1 of the present application.

[0047] Figure 2 It is a flowchart of a high-temperature hydrogen corrosion identification method based on multi-sensor fusion provided in Embodiment 1 of the present application.

[0048] Figure 3 It is a technical route diagram of a high-temperature hydrogen corrosion identification method based on multi-sensor fusion provided in Embodiment 1 of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0049] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0050] Embodiment 1

[0051] The high-temperature hydrogen corrosion identification method based on multi-sensor fusion provided by the embodiments of the present application can be applied to an application environment as Figure 1 shown. Among them, the terminal communicates with the server through the network. The data storage system can store the data that the server needs to process. The data storage system can be set separately, integrated on the server, or placed on the cloud or other servers. The terminal can send the methane concentration, hydrogen concentration, temperature, and pressure at the current sampling moment to be processed to the server. After receiving the methane concentration, hydrogen concentration, temperature, and pressure at the current sampling moment to be processed, for the methane concentration, hydrogen concentration, temperature, and pressure at the current sampling moment to be processed, the server calculates the methane concentration change rate at the current sampling moment based on the methane concentration at the latest m-1 sampling moments before the current sampling moment and the methane concentration at the current sampling moment; determines whether the methane concentration change rate at the current sampling moment is greater than 0; if so, determines that high-temperature hydrogen corrosion occurs at the second location; if not, calculates the high-temperature hydrogen corrosion sensitivity factor at the current sampling moment based on the hydrogen concentration, temperature, and pressure at the current sampling moment, and determines the probability of high-temperature hydrogen corrosion occurring at the second location based on the high-temperature hydrogen corrosion sensitivity factor at the current sampling moment. The server can feedback the high-temperature hydrogen corrosion identification result for the methane concentration, hydrogen concentration, temperature, and pressure at the current sampling moment to the terminal.

[0052] In addition, in some embodiments, the high-temperature hydrogen corrosion identification method based on multi-sensor fusion can also be implemented separately by the server or the terminal. For example, the terminal can directly process the methane concentration, hydrogen concentration, temperature, and pressure at the current sampling moment to be processed, or the server can obtain the methane concentration, hydrogen concentration, temperature, and pressure at the current sampling moment to be processed from the data storage system and process the methane concentration, hydrogen concentration, temperature, and pressure at the current sampling moment to be processed.

[0053] Among them, the terminal can be, but is not limited to, various desktop computers, laptop computers, smart phones, tablet computers, Internet of Things devices, and portable wearable devices. The Internet of Things devices can be smart speakers, smart TVs, smart air conditioners, smart in-vehicle devices, etc. The portable wearable devices can be smart watches, smart bracelets, head-mounted devices, etc. The server can be implemented by an independent server or a server cluster composed of multiple servers, and can also be a cloud server.

[0054] In an exemplary embodiment, as Figure 2 shown, a high-temperature hydrogen corrosion identification method based on multi-sensor fusion is provided. This method is executed by a computer device, and specifically can be executed alone by a computer device such as a terminal or a server, or can be jointly executed by a terminal and a server. In the embodiments of the present application, taking this method applied to Figure 1 the server in as an example for illustration, it includes the following steps.

[0055] Step S1, obtain the methane concentration, hydrogen concentration, temperature, and pressure at the current sampling moment; the methane concentration is collected by a methane sensor installed at a first position on the outer wall of the high-temperature hydrogen-involved equipment, and the hydrogen concentration, the temperature, and the pressure are respectively collected by a hydrogen sensor, a temperature sensor, and a pressure sensor installed at a second position on the inner wall of the high-temperature hydrogen-involved equipment, and the first position and the second position correspond to each other.

[0056] Step S2, based on the methane concentrations at the latest m - 1 sampling moments before the current sampling moment and the methane concentration at the current sampling moment, calculate the methane concentration change rate at the current sampling moment; m is a positive integer greater than 1.

[0057] Step S3, determine whether the methane concentration change rate at the current sampling moment is greater than 0; if so, determine that high-temperature hydrogen corrosion occurs at the second position; if not, calculate the high-temperature hydrogen corrosion sensitivity factor at the current sampling moment based on the hydrogen concentration, temperature, and pressure at the current sampling moment, and determine the probability of high-temperature hydrogen corrosion occurring at the second position based on the high-temperature hydrogen corrosion sensitivity factor at the current sampling moment.

[0058] Implementing the above steps S1 to S3, this embodiment provides a refined high-temperature hydrogen corrosion identification method based on multi-sensor fusion. During the operation of the high-temperature hydrogen-involved equipment, for each sampling moment, based on the methane concentration, hydrogen concentration, temperature, and pressure at the current sampling moment, high-temperature hydrogen corrosion is comprehensively identified, so as to be able to achieve early refined identification of this local damage of high-temperature hydrogen corrosion through multi-sensor fusion technology in a high-temperature environment (because the high-temperature hydrogen-involved equipment itself operates at high temperature).

[0059] In order to improve the recognition accuracy of early refined recognition of high-temperature hydrogen corrosion, a local damage under high-temperature service conditions, this embodiment provides a method for early refined recognition of high-temperature hydrogen corrosion based on multi-sensor fusion, including sensors and a data processing system. The sensors include four types: methane sensors, hydrogen sensors, temperature sensors, and pressure sensors. The data processing system includes two types: a methane sensor data processing system and a hydrogen corrosion sensitivity calculation and determination system. By arranging sensors for collecting parameters such as methane concentration, hydrogen concentration, temperature, and pressure, the key parameters affecting high-temperature hydrogen corrosion can be accurately obtained, and the relevant conditions of high-temperature hydrogen corrosion in a high-temperature environment can be monitored in real time. Further, the recognition process of high-temperature hydrogen corrosion is completed. Using multi-sensor fusion technology can reduce errors caused by insufficient data of a single sensor and improve the accuracy of high-temperature hydrogen corrosion recognition. If the high-temperature hydrogen-related equipment also operates in a high-pressure environment, this embodiment can monitor the relevant conditions of high-temperature hydrogen corrosion in a high-temperature and high-pressure environment in real time and further complete the recognition process of high-temperature hydrogen corrosion.

[0060] The following Figure 3 introduces in detail a method for recognizing high-temperature hydrogen corrosion based on multi-sensor fusion used in this embodiment:

[0061] Step 1: Data acquisition.

[0062] Arrange a hydrogen sensor (specifically, an electrochemical hydrogen sensor, which needs to be resistant to high temperature and high pressure in special environments), a temperature sensor, and a pressure sensor at the parts on the inner wall where hydrogen corrosion may occur. Arrange a methane sensor at the corresponding part on the outer wall to the part where hydrogen corrosion may occur, and respectively monitor the hydrogen concentration, the temperature of the environment, the pressure of the reaction, and the methane concentration of the nearby methane gas in real time.

[0063] At this time, in this embodiment, the methane concentration, hydrogen concentration, temperature, and pressure at the current sampling moment are obtained. The methane concentration is collected by the methane sensor installed at the first position on the outer wall of the high-temperature hydrogen-related equipment. The hydrogen concentration, temperature, and pressure are respectively collected by the hydrogen sensor, temperature sensor, and pressure sensor installed at the second position on the inner wall of the high-temperature hydrogen-related equipment. The first position and the second position correspond to each other. It should be noted that the first position and the second position do not need to be strictly vertically corresponding. Strict vertical correspondence is difficult to achieve in actual implementation because the inside of the high-temperature hydrogen-related equipment is in a closed state, and it is difficult to accurately find the external position that is strictly vertically corresponding to the second position inside. Moreover, when high-temperature hydrogen corrosion occurs, the leakage of methane does not necessarily occur at a certain point outside that is strictly vertically corresponding to the second position. Therefore, in this embodiment, it is only necessary to ensure that the first position is in the area with the same or similar height as the second position. If it cannot be ensured, multiple methane sensors can be arranged to cover the nearby area of the external position corresponding to the second position as much as possible.

[0064] In order to further improve the monitoring and identification effects, in this embodiment, the second position is not randomly selected. Instead, the parts where hydrogen corrosion may occur are selected as the second position. When determining the parts where hydrogen corrosion may occur, it can be determined according to manual experience, or it can be determined according to HAZOP analysis (Hazard and Operability Analysis) or other similar risk assessment analysis methods. Specifically, a risk assessment analysis is pre-conducted on the high-temperature hydrogen-involved equipment, and based on the obtained risk assessment analysis results, the high-risk parts in the high-temperature hydrogen-involved equipment are determined. These high-risk parts are the parts where high-temperature hydrogen corrosion is likely to occur. Subsequently, sensors are arranged at the high-risk parts to conduct real-time monitoring of high-temperature hydrogen corrosion.

[0065] At this time, in this embodiment, the second position is the high-risk part on the high-temperature hydrogen-involved equipment, and the high-risk part is the part where high-temperature hydrogen corrosion is likely to occur determined based on the risk assessment analysis results obtained from the risk assessment analysis of the high-temperature hydrogen-involved equipment.

[0066] Step 2: Data processing of the methane sensor and determination of the identification result.

[0067] The reaction relation of high-temperature hydrogen corrosion is: C + 2H2 = CH4, where C represents carbon, H2 represents hydrogen, and CH4 represents methane. When methane can be detected outside the high-temperature hydrogen-involved equipment, it indicates that high-temperature hydrogen corrosion has occurred. That is to say, methane monitoring has hysteresis. Therefore, in this embodiment, the data of the methane sensor is first used to determine whether high-temperature hydrogen corrosion has occurred. If the identification result is that high-temperature hydrogen corrosion has occurred, it means that high-temperature hydrogen corrosion has already occurred. If the identification result is that high-temperature hydrogen corrosion has not occurred, considering the hysteresis of methane monitoring, it is not necessarily the case that high-temperature hydrogen corrosion has not occurred at this time, and the data of other sensors needs to be further used to determine whether high-temperature hydrogen corrosion has occurred.

[0068] The methane sensor is arranged on the outer wall of the high-temperature hydrogen-involved equipment. In this embodiment, the methane concentration change rate is used as the index for determining whether high-temperature hydrogen corrosion has occurred. The sliding window method is used to calculate the methane concentration change rate at the nth sampling moment (i.e., the current sampling moment), and the change trend of the data collected by the methane sensor is observed. The advantages of introducing the sliding window method are: on the one hand, compared with the method of calculating the methane concentration change rate only using the methane concentration at the nth sampling moment, it can avoid noise interference; on the other hand, compared with the method of calculating the methane concentration change rate using the methane concentrations at all sampling moments, it can avoid the problems of excessive calculation amount and processor operation lag caused by too much collected data.

[0069] The sliding window size is set to m, and m data points are used to smooth the historical data. For the nth sampling moment, when calculating the change rate of methane concentration, the data within the sliding window is the methane concentration from the (n - m + 1)th sampling moment to the nth sampling moment, that is, [C (n-m+1) , C n , C (n-m+1) is the methane concentration at the (n - m + 1)th sampling moment, C n is the methane concentration at the nth sampling moment. Then, the change rate of the methane concentration C n at the nth sampling moment compared to the data within the sliding window is calculated.

[0070] Specifically, the calculation steps of the methane concentration change rate are as follows:

[0071] (1) Calculate the mean μ m and the standard deviation σ m :

[0072]

[0073] In Equation (1), μ m (n) is the mean from the methane concentration C (n-m+1) at the (n - m + 1)th sampling moment to the methane concentration C n at the nth sampling moment, that is, the mean at the current sampling moment n; m is the number of data within the sliding window; C i is the methane concentration at the ith sampling moment.

[0074]

[0075] In Equation (2), σ m (n) is the standard deviation from the methane concentration C (n-m+1) at the (n - m + 1)th sampling moment to the methane concentration C n at the nth sampling moment, that is, the standard deviation at the current sampling moment n, which is used to measure the fluctuation of methane concentration.

[0076] (2) Perform the change rate calculation. By calculating the change rate of the methane concentration C n at the nth sampling moment compared to the mean μ m within the sliding window, the mutation situation of the data can be measured, and the change rate is represented by ΔC:

[0077]

[0078] In Equation (3), ΔC(n) is the initial change rate at the current sampling moment n; C n is the methane concentration at the current sampling moment n; μ m (n) is the mean at the current sampling moment n; σ mThe standard deviation at the current sampling time n is (n).

[0079] (3) Introduce an error variable. Assume that the methane concentration C at each sampling time i includes an error term ∈ i , that is:

[0080] C i = C true,i + ∈ i (4)

[0081] In formula (4), C true,i is the true methane concentration at the i-th sampling time without sensor measurement error.

[0082] Assume that the influence of ∈ i on the entire data set is independent and identically distributed, and is known at the factory or can be measured through experiments.

[0083] (4) Calculate the weighted change rate

[0084]

[0085] In formula (5), is the change rate of the methane concentration at the current sampling time n; C n is the methane concentration at the current sampling time n; μ m (n) is the mean value at the current sampling time n; σ m (n) is the standard deviation at the current sampling time n; σ ∈ is the standard deviation of the sensor measurement error at the current sampling time n, representing the sensor error level, which can be estimated by calculating the standard deviation of the methane concentration at the previous n - 1 sampling times, specifically equal to the standard deviation of the methane concentration at all sampling times from the starting sampling time to the previous sampling time before the current sampling time:

[0086]

[0087] In formula (6), μ n-1 is the mean value of the methane concentration at the previous n - 1 sampling times.

[0088]

[0089] After calculating the weighted change rate, further judgment is made:

[0090] (1) If then it is considered that a large fluctuation in the methane concentration has occurred and high-temperature hydrogen corrosion has occurred.

[0091] (2) If then go to step three and use the data of other sensors to make a judgment.

[0092] At this time, in this embodiment, based on the methane concentrations at the latest m - 1 sampling times before the current sampling time and the methane concentration at the current sampling time, the methane concentration change rate at the current sampling time is calculated, where m is a positive integer greater than 1. It is determined whether the methane concentration change rate at the current sampling time is greater than 0. If so, that is, the methane concentration change rate at the current sampling time is greater than 0, it is determined that high - temperature hydrogen corrosion occurs at the second location.

[0093] Among them, based on the methane concentrations at the latest m - 1 sampling times before the current sampling time and the methane concentration at the current sampling time, calculating the methane concentration change rate at the current sampling time specifically includes:

[0094] (1) Based on the methane concentrations at the latest m - 1 sampling times before the current sampling time and the methane concentration at the current sampling time, the initial change rate at the current sampling time is calculated.

[0095] Based on the methane concentrations at the latest m - 1 sampling times before the current sampling time and the methane concentration at the current sampling time, calculating the initial change rate at the current sampling time specifically includes: calculating the mean and standard deviation of the methane concentrations at the latest m - 1 sampling times before the current sampling time and the methane concentration at the current sampling time to obtain the mean and standard deviation at the current sampling time. The calculation formula for the mean is formula (1), and the calculation formula for the standard deviation is formula (2). Based on the methane concentration, mean, and standard deviation at the current sampling time, the initial change rate at the current sampling time is calculated, and the calculation formula for the initial change rate is formula (3).

[0096] (2) Adding the sensor measurement error to the initial change rate to calculate the methane concentration change rate at the current sampling time. The calculation formula for the methane concentration change rate is formula (5).

[0097] Step 3: Data processing of multiple sensors inside the high - temperature hydrogen - involved equipment and determination of the recognition result.

[0098] (1) Input the material classification of the high - temperature hydrogen - involved equipment and the service time age (hours).

[0099] (2) Input the hydrogen concentration at the current sampling time collected by the hydrogen sensor

[0100] (3) Input the pressure P (MPa) at the current sampling time collected by the pressure sensor.

[0101] (4) Calculate the hydrogen partial pressure According to Dalton's law of partial pressures,

[0102] (5) The temperature T (°C) at the current sampling moment collected by the input temperature sensor.

[0103] (6) Calculate the high-temperature hydrogen corrosion sensitivity factor P v :

[0104]

[0105] In Equation (8), P v is the high-temperature hydrogen corrosion sensitivity factor at the current sampling moment; is the hydrogen partial pressure at the current sampling moment, is the hydrogen concentration at the current sampling moment, P is the pressure at the current sampling moment; T is the temperature at the current sampling moment; age is the service time of the high-temperature hydrogen-involved equipment.

[0106] The core of collaborative determination lies in comprehensively utilizing different types of information provided by each type of sensor to analyze the possible probability of high-temperature hydrogen corrosion occurrence.

[0107] (7) High-temperature hydrogen corrosion sensitivity determination.

[0108] Based on the high-temperature hydrogen corrosion sensitivity factor, complete the high-temperature hydrogen corrosion sensitivity determination using Table 1 below.

[0109] Table 1 High-temperature hydrogen corrosion sensitivity determination

[0110]

[0111] At this time, in this embodiment, if not, that is, the methane concentration change rate at the current sampling moment is equal to 0, then based on the hydrogen concentration, temperature, and pressure at the current sampling moment, calculate the high-temperature hydrogen corrosion sensitivity factor at the current sampling moment, and based on the high-temperature hydrogen corrosion sensitivity factor at the current sampling moment, determine the probability of high-temperature hydrogen corrosion occurring at the second position.

[0112] The calculation formula for the high-temperature hydrogen corrosion sensitivity factor is Equation (8).

[0113] Among them, based on the high-temperature hydrogen corrosion sensitivity factor at the current sampling moment, determining the probability of high-temperature hydrogen corrosion occurring at the second position specifically includes:

[0114] (1) Determine whether the high-temperature hydrogen corrosion sensitivity factor at the current sampling moment is greater than the first preset value to obtain the first judgment result.

[0115] (2) If the first judgment result is yes, then the probability of high-temperature hydrogen corrosion occurring at the second position is the first probability. At this time, it is high sensitivity, and feedback a suggestion to the user to stop the machine for inspection.

[0116] (3) If the first judgment result is negative, then determine whether the high-temperature hydrogen corrosion sensitivity factor at the current sampling moment is greater than the second preset value to obtain a second judgment result.

[0117] (4) If the second judgment result is positive, the probability of high-temperature hydrogen corrosion occurring at the second position is the second probability. At this time, it is medium sensitivity, and feedback to the user is given to increase the sampling frequencies of the methane sensor, hydrogen sensor, temperature sensor, and pressure sensor.

[0118] (5) If the second judgment result is negative, then determine whether the high-temperature hydrogen corrosion sensitivity factor at the current sampling moment is greater than the third preset value to obtain a third judgment result.

[0119] (6) If the third judgment result is positive, the probability of high-temperature hydrogen corrosion occurring at the second position is the third probability. At this time, it is low sensitivity, and feedback to the user is given to continue real-time monitoring.

[0120] (7) If the third judgment result is negative, the probability of high-temperature hydrogen corrosion occurring at the second position is the fourth probability. At this time, it is non-sensitive, and feedback to the user is given that there is no risk, and it is recommended to continue real-time monitoring.

[0121] Among them, the first preset value, the second preset value, and the third preset value are determined based on the material of the high-temperature hydrogen-related equipment, specifically determined according to the critical P v coefficient. Taking the material of the high-temperature hydrogen-related equipment as carbon steel as an example, the first preset value is 4.70, the second preset value is 4.61, the third preset value is 4.53, the first probability is greater than the second probability, the second probability is greater than the third probability, and the third probability is greater than the fourth probability. The specific values can be determined according to the actual situation.

[0122] This embodiment can realize real-time monitoring and identification of whether high-temperature hydrogen corrosion occurs, and when it is determined that high-temperature hydrogen corrosion does not occur, identify the high-temperature hydrogen corrosion sensitivity to give operation suggestions, with high accuracy, simple implementation, and strong operability. The sliding window method is used for data processing of the methane concentration change rate, minimizing the burden on the data processing system to the greatest extent, and minimizing the negative impact of sensor noise interference and further introducing errors, which can further improve the calculation accuracy of the methane concentration change rate.

[0123] This application also provides an application scenario, which applies the above-mentioned high-temperature hydrogen corrosion identification method based on multi-sensor fusion. Specifically, the high-temperature hydrogen corrosion identification method based on multi-sensor fusion provided in this embodiment can be applied in a high-temperature hydrogen corrosion identification scenario. The high-temperature hydrogen corrosion identification scenario includes an identification link and a display link. The identification link is used to identify high-temperature hydrogen corrosion based on the collected data of multiple sensors, and the display link is used to display the identification result of high-temperature hydrogen corrosion to the user. The high-temperature hydrogen corrosion identification method based on multi-sensor fusion provided in this embodiment belongs to the identification link.

[0124] Example 2

[0125] This embodiment provides a high-temperature hydrogen corrosion identification device based on multi-sensor fusion. The high-temperature hydrogen corrosion identification device based on multi-sensor fusion includes: a methane sensor, a hydrogen sensor, a temperature sensor, a pressure sensor, and a processor.

[0126] The methane sensor is installed at a first position on the outer wall of the high-temperature hydrogen-related equipment and is used to collect the methane concentration at the current sampling moment.

[0127] The hydrogen sensor is installed at a second position on the inner wall of the high-temperature hydrogen-related equipment and is used to collect the hydrogen concentration at the current sampling moment. The first position corresponds to the second position.

[0128] The temperature sensor is installed at the second position on the inner wall of the high-temperature hydrogen-related equipment and is used to collect the temperature at the current sampling moment.

[0129] The pressure sensor is installed at the second position on the inner wall of the high-temperature hydrogen-related equipment and is used to collect the pressure at the current sampling moment.

[0130] The processor is communicatively connected to the methane sensor, the hydrogen sensor, the temperature sensor, and the pressure sensor respectively, and is used to execute the high-temperature hydrogen corrosion identification method based on multi-sensor fusion described in Example 1.

[0131] Example 3

[0132] In an exemplary embodiment, a computer device is provided, including a memory and a processor. A computer program is stored in the memory, and when the processor executes the computer program, it implements the high-temperature hydrogen corrosion identification method based on multi-sensor fusion in Example 1.

[0133] Example 4

[0134] In an exemplary embodiment, a computer-readable storage medium is provided, storing a computer program, and when the computer program is executed by a processor, it implements the high-temperature hydrogen corrosion identification method based on multi-sensor fusion in Example 1.

[0135] Example 5

[0136] In an exemplary embodiment, a computer program product is provided, including a computer program, and when the computer program is executed by a processor, it implements the high-temperature hydrogen corrosion identification method based on multi-sensor fusion in Example 1.

[0137] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, displayed data, etc.) involved in this application are all information and data that have been authorized by the user or fully authorized by all parties, and the collection, use, and processing of relevant data need to comply with relevant regulations.

[0138] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as within the scope described in this specification.

[0139] Specific examples are used in this article to elaborate on the principles and implementation manners of this application. The description of the above embodiments is only used to help understand the method and its core idea of this application; at the same time, for those of ordinary skill in the art, according to the idea of this application, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to this application.

Claims

1. A method for identifying high-temperature hydrogen corrosion based on multi-sensor fusion, characterized in that, The high-temperature hydrogen corrosion identification method based on multi-sensor fusion includes: Obtain the methane concentration, hydrogen concentration, temperature, and pressure at the current sampling moment; the methane concentration is collected by a methane sensor installed at the first position on the outer wall of the high-temperature hydrogen-related equipment, and the hydrogen concentration, the temperature, and the pressure are respectively collected by a hydrogen sensor, a temperature sensor, and a pressure sensor installed at the second position on the inner wall of the high-temperature hydrogen-related equipment, and the first position and the second position correspond to each other; Based on the methane concentrations at the latest m - 1 sampling moments before the current sampling moment and the methane concentration at the current sampling moment, calculate the methane concentration change rate at the current sampling moment; m is a positive integer greater than 1; Judge whether the methane concentration change rate at the current sampling moment is greater than 0; if so, determine that high-temperature hydrogen corrosion occurs at the second position; if not, calculate the high-temperature hydrogen corrosion sensitivity factor at the current sampling moment based on the hydrogen concentration, temperature, and pressure at the current sampling moment, and determine the probability of high-temperature hydrogen corrosion occurring at the second position based on the high-temperature hydrogen corrosion sensitivity factor at the current sampling moment.

2. The method for identifying high-temperature hydrogen corrosion based on multi-sensor fusion according to claim 1, characterized in that The second position is a high-risk part on the high-temperature hydrogen-related equipment, and the high-risk part is a part prone to high-temperature hydrogen corrosion determined based on the risk assessment analysis result obtained from the risk assessment analysis of the high-temperature hydrogen-related equipment.

3. The method for identifying high-temperature hydrogen corrosion based on multi-sensor fusion according to claim 1, wherein Based on the methane concentrations at the latest m - 1 sampling moments before the current sampling moment and the methane concentration at the current sampling moment, calculating the methane concentration change rate at the current sampling moment specifically includes: Based on the methane concentrations at the latest m - 1 sampling moments before the current sampling moment and the methane concentration at the current sampling moment, calculate the initial change rate at the current sampling moment; Add the sensor measurement error to the initial change rate to calculate the methane concentration change rate at the current sampling moment.

4. The method for identifying high-temperature hydrogen corrosion based on multi-sensor fusion according to claim 3, wherein Based on the methane concentrations at the latest m - 1 sampling moments before the current sampling moment and the methane concentration at the current sampling moment, calculating the initial change rate at the current sampling moment specifically includes: Calculate the mean and standard deviation of the methane concentrations at the latest m - 1 sampling moments before the current sampling moment and the methane concentration at the current sampling moment to obtain the mean and standard deviation at the current sampling moment; Based on the methane concentration, mean, and standard deviation at the current sampling moment, calculate the initial change rate at the current sampling moment; The calculation formula for the initial change rate is: where, ΔC(n) is the initial change rate at the current sampling time n; C n is the methane concentration at the current sampling time n; μ m (n) is the mean value at the current sampling time n; σ m (n) is the standard deviation at the current sampling time n.

5. The method for identifying high-temperature hydrogen corrosion based on multi-sensor fusion according to claim 4, wherein The calculation formula for the methane concentration change rate is: Among them, is the methane concentration change rate at the current sampling time n; C n is the methane concentration at the current sampling time n; μ m (n) is the mean value at the current sampling time n; σ m (n) is the standard deviation at the current sampling time n; σ ∈ is the standard deviation of the sensor measurement error at the current sampling time n, which is equal to the standard deviation of the methane concentration at all sampling times between the start sampling time and the previous sampling time of the current sampling time.

6. The method for identifying high-temperature hydrogen corrosion based on multi-sensor fusion according to claim 1, characterized in that The calculation formula for the high-temperature hydrogen corrosion sensitivity factor is: Among them, P v is the high-temperature hydrogen corrosion sensitivity factor at the current sampling moment; is the hydrogen partial pressure at the current sampling moment, is the hydrogen concentration at the current sampling moment, P is the pressure at the current sampling moment; T is the temperature at the current sampling moment; age is the service time of the high-temperature hydrogen-involved equipment.

7. The method for identifying high-temperature hydrogen corrosion based on multi-sensor fusion according to claim 1, characterized in that Based on the high-temperature hydrogen corrosion sensitivity factor at the current sampling moment, determining the probability of high-temperature hydrogen corrosion occurring at the second position specifically includes: Judge whether the high-temperature hydrogen corrosion sensitivity factor at the current sampling moment is greater than the first preset value to obtain the first judgment result; If the first judgment result is yes, the probability of high-temperature hydrogen corrosion occurring at the second position is the first probability, and at this time it is high sensitivity, and feedback a suggestion to stop the machine for inspection to the user; If the first judgment result is no, then judge whether the high-temperature hydrogen corrosion sensitivity factor at the current sampling moment is greater than the second preset value to obtain the second judgment result; If the second judgment result is yes, the probability of high-temperature hydrogen corrosion occurring at the second position is the second probability. At this time, it is medium sensitivity, and feedback is sent to the user to suggest increasing the sampling frequencies of the methane sensor, hydrogen sensor, temperature sensor, and pressure sensor; If the second judgment result is no, it is determined whether the high-temperature hydrogen corrosion sensitivity factor at the current sampling moment is greater than a third preset value to obtain a third judgment result; If the third judgment result is yes, the probability of high-temperature hydrogen corrosion occurring at the second position is the third probability. At this time, it is low sensitivity, and feedback is sent to the user to suggest continuing real-time monitoring; If the third judgment result is no, the probability of high-temperature hydrogen corrosion occurring at the second position is the fourth probability. At this time, it is non-sensitivity, and feedback is sent to the user that there is no risk, and it is recommended to continue real-time monitoring; Among them, the first preset value, the second preset value, and the third preset value are determined based on the material of the high-temperature hydrogen-related equipment. The first probability is greater than the second probability, the second probability is greater than the third probability, and the third probability is greater than the fourth probability.

8. An apparatus for identifying high-temperature hydrogen corrosion based on multi-sensor fusion, characterized in that, The high-temperature hydrogen corrosion identification device based on multi-sensor fusion includes: a methane sensor, a hydrogen sensor, a temperature sensor, a pressure sensor, and a processor; The methane sensor is installed at a first position on the outer wall of the high-temperature hydrogen-related equipment and is used to collect the methane concentration at the current sampling moment; The hydrogen sensor is installed at a second position on the inner wall of the high-temperature hydrogen-related equipment and is used to collect the hydrogen concentration at the current sampling moment; the first position corresponds to the second position; The temperature sensor is installed at a second position on the inner wall of the high-temperature hydrogen-related equipment and is used to collect the temperature at the current sampling moment; The pressure sensor is installed at a second position on the inner wall of the high-temperature hydrogen-related equipment and is used to collect the pressure at the current sampling moment; The processor is communicatively connected to the methane sensor, the hydrogen sensor, the temperature sensor, and the pressure sensor respectively, and is used to execute the high-temperature hydrogen corrosion identification method based on multi-sensor fusion according to any one of claims 1-7.

9. A computer device, comprising: A memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the processor executes the computer program to implement the high-temperature hydrogen corrosion identification method based on multi-sensor fusion according to any one of claims 1-7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the high-temperature hydrogen corrosion identification method based on multi-sensor fusion according to any one of claims 1-7.

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