Pipe wall thinning monitoring method, device and equipment for boiler heating surface and storage medium

Abstract

The invention discloses a pipe wall thinning monitoring method, device and equipment of a boiler heating surface and a storage medium, and relates to the technical field of boiler monitoring, and the pipe wall thinning monitoring method of the boiler heating surface comprises the steps that excitation current is provided for a Wheatstone bridge through a constant current source; obtaining first voltage data of the reference section and the monitoring section and second voltage data of the two fixed resistors from the Wheatstone bridge, and obtaining a voltage difference value according to the first voltage data and the second voltage data; environmental data are obtained, and the pipe wall thickness reduction amount of the monitoring section is obtained according to the environmental data, the voltage difference value and a preset lookup table; and generating state early warning information based on a comparison result of the thickness reduction amount and a preset threshold value. According to the invention, the accuracy of boiler pipe wall thinning monitoring can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of boiler monitoring, in particular to a boiler heating surface tube wall thinning monitoring method, device, equipment and storage medium. BACKGROUND

[0002] The boiler heating surface tube wall is prone to thinning due to long-term exposure to high temperature, corrosion and wear environment. The existing monitoring technology such as bypass probe method is inaccurate due to environmental differences, and the direct resistance measurement method is seriously disturbed by temperature, therefore, how to improve the accuracy of boiler tube wall thinning monitoring is still a problem to be solved.

[0003] The above content is only used to assist in understanding the technical solutions of the present application, and does not represent the acknowledgement of the above content as prior art. SUMMARY

[0004] The main purpose of the present application is to provide a boiler heating surface tube wall thinning monitoring method, device, equipment and storage medium, which aims to solve the technical problem of how to improve the accuracy of boiler tube wall thinning monitoring.

[0005] To achieve the above purpose, the present application provides a boiler heating surface tube wall thinning monitoring method, which comprises: A constant current source is used to provide excitation current to a Wheatstone bridge, two adjacent bridge arms of the Wheatstone bridge are respectively composed of a reference section and a monitoring section on the same pipe of the boiler, and the other two adjacent bridge arms are composed of two fixed resistors; First voltage data of the reference section and the monitoring section and second voltage data of the two fixed resistors are obtained from the Wheatstone bridge, and a voltage difference value is obtained according to the first voltage data and the second voltage data; Obtain environmental data, and obtain the tube wall thickness thinning amount of the monitoring section according to the environmental data, the voltage difference value and a preset lookup table; Generate state warning information based on the comparison result of the thickness thinning amount and a preset threshold.

[0006] In an embodiment, the step of providing excitation current to the Wheatstone bridge by a constant current source comprises: A constant current source generates an excitation current of a preset size; The excitation current is applied to the Wheatstone bridge circuit; The stability of the excitation current is monitored, and calibration is performed when the fluctuation of the excitation current exceeds the allowable range.

[0007] In an embodiment, the step of obtaining a voltage difference value according to the first voltage data and the second voltage data comprises: differential amplifying and filtering the first voltage data and the second voltage data through a differential amplifier to obtain a first amplified voltage and a second amplified voltage; obtaining a voltage difference value according to the first amplified voltage and the second amplified voltage.

[0008] In an embodiment, after the step of obtaining the wall thickness reduction amount of the monitoring section, the method further comprises: calculating a reduction rate according to the change time of the thickness reduction amount; comparing the reduction rate with a preset rate threshold to obtain a rate comparison result; generating state warning information according to the rate comparison result.

[0009] In an embodiment, the step of generating state warning information based on the comparison result of the thickness reduction amount and the preset threshold comprises: comparing the thickness reduction amount with the preset threshold to determine a severity level of the thickness reduction amount; generating state warning information of a corresponding level according to the severity level.

[0010] In an embodiment, after the step of generating state warning information based on the comparison result of the thickness reduction amount and the preset threshold, the method further comprises: visually highlighting and positioning the corresponding position of the thickness reduction amount on a three-dimensional boiler model for display; synchronously displaying the state warning information at the corresponding position.

[0011] In an embodiment, after the step of generating state warning information based on the comparison result of the thickness reduction amount and the preset threshold, the method further comprises: obtaining historical data of the thickness reduction amount and generating a reduction trend curve; performing residual life prediction calculation based on the reduction trend curve and generating a monitoring report.

[0012] In addition, to achieve the above-mentioned purpose, the application further provides a boiler heating surface pipe wall thinning monitoring device, which comprises: a providing module configured to provide an excitation current to a Wheatstone bridge through a constant current source, two adjacent bridge arms of the Wheatstone bridge being composed of a reference section and a monitoring section on the same pipe of a boiler, and the other two adjacent bridge arms being composed of two fixed resistors; an obtaining module configured to obtain first voltage data of the reference section and the monitoring section and second voltage data of the two fixed resistors from the Wheatstone bridge, and obtain a voltage difference value according to the first voltage data and the second voltage data; The searching module is configured to acquire environment data, and obtain a tube wall thickness reduction amount of the monitoring section according to the environment data, the voltage difference and a preset searching table. The early warning module is configured to generate state early warning information based on a comparison result of the thickness reduction amount and a preset threshold.

[0013] In addition, to achieve the above-mentioned purpose, the present application further provides a boiler heating surface tube wall reduction monitoring device, which comprises a memory, a processor and a computer program stored in the memory and executable on the processor, and the computer program is configured to implement the steps of the boiler heating surface tube wall reduction monitoring method as described above.

[0014] In addition, to achieve the above-mentioned purpose, the present application further provides a storage medium, which is a computer readable storage medium, and the storage medium stores a computer program, and the computer program is executed by a processor to implement the steps of the boiler heating surface tube wall reduction monitoring method as described above.

[0015] In addition, to achieve the above-mentioned purpose, the present application further provides a computer program product, which comprises a computer program, and the computer program is executed by a processor to implement the steps of the boiler heating surface tube wall reduction monitoring method as described above.

[0016] The present application provides a boiler heating surface tube wall reduction monitoring method, and the present application provides an excitation current to a Wheatstone bridge through a constant current source, two adjacent bridge arms of the Wheatstone bridge are respectively composed of a reference section and a monitoring section on the same pipe of a boiler, and the other two adjacent bridge arms are composed of two fixed resistors; first voltage data of the reference section and the monitoring section and second voltage data of the two fixed resistors are acquired from the Wheatstone bridge, and a voltage difference is obtained according to the first voltage data and the second voltage data; environment data is acquired, and a tube wall thickness reduction amount of the monitoring section is obtained according to the environment data, the voltage difference and a preset searching table; and state early warning information is generated based on a comparison result of the thickness reduction amount and a preset threshold. The present application sets the reference section and the monitoring section in parallel on the same pipe, and adopts the Wheatstone bridge differential measurement principle to convert synchronous resistance changes of the two sections of pipes caused by temperature changes into common mode signals for suppression, thereby improving the accuracy of the boiler tube wall reduction monitoring. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a flowchart illustrating an embodiment of the boiler heating surface tube wall thinning monitoring method of this application. Figure 2 This is a schematic diagram of the arrangement of measuring contacts and the differential measurement principle on a single pipe provided in Embodiment 1 of the boiler heating surface tube wall thinning monitoring method of this application; Figure 3 This is a schematic diagram of the overall structure of the boiler heating surface tube wall thinning monitoring method provided in Embodiment 1 of the present application; Figure 4 The schematic diagram of the Wheatstone half-bridge measurement circuit provided in Embodiment 1 of the boiler heating surface tube wall thinning monitoring method of this application; Figure 5 This is a flowchart illustrating Embodiment 2 of the boiler heating surface tube wall thinning monitoring method provided in this application; Figure 6 A simplified flowchart illustrating the method for monitoring the thinning of the boiler heating surface tubes provided in Embodiment 1 of this application; Figure 7 This is a schematic diagram of the module structure of the boiler heating surface tube wall thinning monitoring device according to an embodiment of this application; Figure 8 This is a schematic diagram of the equipment structure of the hardware operating environment involved in the boiler heating surface tube wall thinning monitoring method in the embodiments of this application.

[0020] The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0021] It should be understood that the specific embodiments described herein are merely illustrative of the technical solutions of this application and are not intended to limit this application.

[0022] To better understand the technical solution of this application, a detailed description will be provided below in conjunction with the accompanying drawings and specific implementation methods.

[0023] The application provides an excitation current to a Wheatstone bridge through a constant current source, two adjacent bridge arms of the Wheatstone bridge are respectively composed of a reference section and a monitoring section on the same pipeline of a boiler, and the other two adjacent bridge arms are composed of two fixed resistors; first voltage data of the reference section and the monitoring section and second voltage data of the two fixed resistors are obtained from the Wheatstone bridge, and a voltage difference value is obtained according to the first voltage data and the second voltage data; environmental data is obtained, a thickness reduction amount of a pipe wall of the monitoring section is obtained according to the environmental data, the voltage difference value and a preset lookup table; and state early warning information is generated based on a comparison result of the thickness reduction amount and a preset threshold.

[0024] The pipe wall of a boiler heating surface is prone to thinning due to long-term high-temperature, corrosion and wear environment. The existing monitoring technology such as a bypass probe method is inaccurate due to environmental differences, and a direct resistance measurement method is seriously disturbed by temperature, so how to improve the accuracy of boiler pipe wall thinning monitoring is still a problem to be solved.

[0025] The application parallelly arranges a reference section and a monitoring section on the same pipeline, and adopts a Wheatstone bridge differential measurement principle to convert synchronous resistance changes of the two sections caused by temperature changes into common mode signals for suppression, thereby improving the accuracy of boiler pipe wall thinning monitoring.

[0026] Based on this, the application embodiment provides a pipe wall thinning monitoring method for a boiler heating surface, referring to Figure 1 , Figure 1 The flowchart of the first embodiment of the pipe wall thinning monitoring method for the boiler heating surface of the application is shown.

[0027] In this embodiment, the pipe wall thinning monitoring method for the boiler heating surface comprises steps S10-S40: Step S10: providing an excitation current to a Wheatstone bridge through a constant current source, two adjacent bridge arms of the Wheatstone bridge are respectively composed of a reference section and a monitoring section on the same pipeline of a boiler, and the other two adjacent bridge arms are composed of two fixed resistors; It should be noted that the execution subject of the embodiment can be a computing service device with data processing, network communication and program running functions, such as a tablet computer, a personal computer, a mobile phone, etc., or an electronic device capable of realizing the above functions, a pipe wall thinning monitoring device for a boiler heating surface, etc. In the following, the pipe wall thinning monitoring device for the boiler heating surface is taken as an example to describe the embodiment and the following embodiments.

[0028] It should be noted that the principle of the application is that two adjacent pipe sections experiencing the same temperature history and environment are selected on the same pipeline, one as a reference section and one as a monitoring section. The relative change of the resistance of the two is measured by the Wheatstone bridge, not the absolute value, which can be referred to Figure 2 ,Figure 2 The schematic diagram of the measurement contact arrangement on a single pipeline and the differential measurement principle. Since the influence of temperature change on the two sections is synchronous and similar (common mode signal), and the wall thickness thinning only acts on the monitoring section (differential mode signal), the bridge output can greatly suppress the common mode interference and extract the weak effective signal. Among them, the measurement contact unit is made of high-temperature resistant alloy material through laser welding or high-temperature sintering sealing process, which ensures the formation of durable, stable and low resistance ohmic contact with the pipe wall, and ensures electrical insulation. For reference Figure 3 , Figure 3 is a schematic diagram of the overall structure, which sequentially measures the mechanical energy of the boiler heating surface pipeline through the measurement contact unit, collects data through the differential data acquisition module, transmits data through the signal transmission unit and the shielded twisted pair, processes data through the data concentrator, displays results through the data analysis and monitoring platform industrial computer or server, and can realize Web visualization through human-computer interaction interface, and data storage and early warning.

[0029] It should be noted that for reference Figure 4 , Figure 4 is a Wheatstone half-bridge measurement circuit schematic. Figure 2 , R_ref corresponds to Figure 2 the reference section resistance, R_mon corresponds to the monitoring section resistance, both of which are connected to the two arms of the bridge; R1, R2 are high-precision fixed resistors, which constitute the other two arms of the bridge, used to provide a stable reference voltage. Node A is the constant current source input point, node B is the bridge output ground reference point, nodes C and D are respectively the connection points of R_mon and R2 in the bridge, and the potential difference V_out = V_C - V_D is used as the differential voltage output. The voltage output reflects the resistance change of the monitoring section relative to the reference section in real time. Its core principle is: according to the conductor resistance law, where is the material resistivity, is the length of the conductor, and is the cross-sectional area of the conductor. For a pipeline of a certain length (constant), its cross-sectional area (where is the outer diameter of the pipeline, and is the wall thickness). When the wall thickness is reduced (decreased), the effective cross-sectional area of the conductor will decrease, resulting in an increase in the resistance R_mon. Therefore, the change of the monitoring section resistance R_mon directly reflects the thinning of the wall thickness. The relative change (ΔR / R) of the resistance is measured by the Wheatstone half-bridge, and the differential voltage V_out is output. Through pre-experimental calibration or theoretical calculation, a quantitative corresponding relationship (i.e. calibration curve) between V_out and wall thickness reduction (Δt) is established, and the actual pipe wall thickness reduction is obtained, realizing high-precision online monitoring. Therefore, by measuring the value of V_out in real time, the actual pipe wall thickness reduction of the monitoring section can be directly converted through the relationship, thereby realizing high-precision online monitoring and life assessment.

[0030] In a possible implementation, the step of providing the excitation current to the Wheatstone bridge by the constant current source comprises: generating an excitation current of a preset size by the constant current source; applying the excitation current to the Wheatstone bridge circuit; monitoring stability of the excitation current, and calibrating when fluctuation of the excitation current exceeds an allowable range.

[0031] It should be noted that a precision constant current source chip with low temperature drift can be used to generate a stable current of 150 mA, and fluctuation of the current is controlled within ±0.01%; the generated stable current is applied to a Wheatstone half-bridge circuit composed of a reference section, a monitoring section, and two 100Ω precision resistors; the stability of the excitation current is monitored in real time by the built-in current monitoring circuit, and when it is detected that the current fluctuation exceeds ±0.05%, the digital potentiometer is automatically started for current calibration, thereby ensuring the measurement accuracy.

[0032] Step S20: obtaining first voltage data of the reference section and the monitoring section and second voltage data of the two fixed resistors from the Wheatstone bridge, and obtaining a voltage difference value according to the first voltage data and the second voltage data; It should be noted that the differential data acquisition module can be a sealed metal shell, and the Wheatstone bridge circuit, the high-precision constant current source, the high common-mode rejection ratio instrument amplifier, the 24-bit high-precision ADC, and the temperature sensor are built-in. The signal transmission unit can be connected by shielded twisted pair lines to transmit data remotely to the monitoring platform.

[0033] In a possible implementation, the step of obtaining the voltage difference value according to the first voltage data and the second voltage data comprises: performing differential amplification and filtering processing on the first voltage data and the second voltage data by a differential amplifier to obtain a first amplified voltage and a second amplified voltage; and obtaining the voltage difference value according to the first amplified voltage and the second amplified voltage.

[0034] It should be noted that the instrument amplifier with a high common-mode rejection ratio (>120dB) can be used to acquire the first voltage signal between the reference section and the monitoring section; meanwhile, the same acquisition channel is used to acquire the second voltage signal between the two fixed resistors; the first voltage signal and the second voltage signal are amplified by 500 times by the instrument amplifier to obtain an amplified voltage difference signal; and a second-order Butterworth low-pass filter is used to filter the amplified voltage difference signal, and the cutoff frequency is set to 10 Hz to eliminate high-frequency electromagnetic interference in the field.

[0035] Step S30: obtaining environmental data, and obtaining a pipe wall thickness reduction amount of the monitoring section according to the environmental data, the voltage difference value, and a preset lookup table; It should be noted that the environmental data includes temperature values, pipe wall materials, etc. The preset lookup table can be a large number of empirical values obtained according to historical data before. The real-time temperature value measured by the temperature sensor attached to the surface of the pipeline is introduced when calculating the wall thickness reduction, which can assist in compensating and correcting the final calculated wall thickness reduction.

[0036] In a feasible manner, after the step of obtaining the wall thickness reduction of the monitoring section, the method further comprises: calculating a reduction rate according to the change time of the thickness reduction; comparing the reduction rate with a preset rate threshold to obtain a rate comparison result; and generating state warning information according to the rate comparison result.

[0037] It should be noted that after obtaining the wall thickness reduction of the monitoring section, the reduction rate can be calculated according to the change time of the thickness reduction, and a sliding time window method is used with 1000 hours as a calculation period. Then the calculated reduction rate is compared with a preset multi-level rate threshold, and the rate threshold is set to 0.05mm / 1000 hours, 0.10mm / 1000 hours and 0.15mm / 1000 hours. Finally, according to the rate comparison result, the corresponding state warning information is generated. When the monitored reduction rate increases from the initial 0.05mm / 1000 hours to 0.12mm / 1000 hours, the system triggers an accelerated wear warning, prompting the operation and maintenance personnel to pay attention to the wear intensification trend.

[0038] Step S40: generating state warning information based on the comparison result of the thickness reduction and the preset threshold.

[0039] It should be noted that based on the comparison result of the thickness reduction and the preset threshold, it can be judged whether the current reduction is abnormal, and multi-level warning can be performed according to the amount of reduction.

[0040] In a feasible manner, after the step of generating state warning information based on the comparison result of the thickness reduction and the preset threshold, the method further comprises: visually highlighting and positioning the corresponding position of the thickness reduction on the three-dimensional boiler model; and synchronously displaying the state warning information at the corresponding position.

[0041] It should be noted that after generating state warning information based on the comparison result of the thickness reduction and the preset threshold, the embodiment can visually highlight and position the corresponding position of the thickness reduction on the three-dimensional boiler model, and use a red highlight flashing effect to identify the pipe section with excessive reduction. Then the state warning information is synchronously displayed at the corresponding position, including displaying the specific reduction value (such as reduction: 2.1mm), reduction rate and risk level in the form of a label. The operation and maintenance personnel can view the detailed historical data and trend analysis chart of the monitoring point by clicking on the highlighted area on the three-dimensional model.

[0042] In a feasible manner, after the step of generating state warning information based on the comparison result of the thickness reduction amount and the preset threshold, the method further comprises: acquiring historical data of the thickness reduction amount and generating a reduction trend curve; performing residual life prediction calculation based on the reduction trend curve and generating a monitoring report.

[0043] It should be noted that after generating the state warning information, the embodiment can also acquire historical data of the thickness reduction amount, generate a reduction trend curve with 8 months as a complete monitoring period, and use an exponential fitting algorithm to improve the prediction accuracy. Then, residual life prediction calculation is performed based on the reduction trend curve, and a linear extrapolation method is used in combination with a material creep characteristic model to trigger a warning when the predicted residual life is lower than a major repair cycle. Finally, a complete monitoring report containing the current state, trend analysis, residual life prediction, and maintenance recommendations is automatically generated, and the report is output in PDF format and automatically sent to the equipment management department.

[0044] In the embodiment, a constant current source provides excitation current to a Wheatstone bridge, two adjacent bridge arms of the Wheatstone bridge are respectively composed of a reference section and a monitoring section on the same pipeline of the boiler, and the other two adjacent bridge arms are composed of two fixed resistors; first voltage data of the reference section and the monitoring section and second voltage data of the two fixed resistors are acquired from the Wheatstone bridge, and a voltage difference value is obtained according to the first voltage data and the second voltage data; environmental data is acquired, and a thickness reduction amount of the monitoring section is obtained according to the environmental data, the voltage difference value, and a preset lookup table; and state warning information is generated based on a comparison result of the thickness reduction amount and a preset threshold. In the embodiment, the reference section and the monitoring section are arranged in parallel on the same pipeline, and the Wheatstone bridge differential measurement principle is used to convert the synchronous resistance changes of the two sections of the pipeline caused by temperature changes into common mode signals for suppression, thereby improving the accuracy of the boiler pipe wall thickness reduction monitoring.

[0045] Based on the first embodiment of the present application, in the second embodiment of the present application, the same or similar contents as the above-mentioned first embodiment can be referred to the above introduction, and the following will not be described in detail. On this basis, please refer to Figure 5 , step S40 further comprises steps S401-S402: Step S401: comparing the thickness reduction amount with a preset threshold to determine the severity level of the thickness reduction amount; It should be noted that the thickness reduction amount calculated in real time is compared with the preset three-level threshold, and the three-level threshold is set to 1.5 mm, 2.0 mm, and 2.5 mm, corresponding to the three severity levels of attention, warning, and danger.

[0046] Step S402: generating state warning information of the corresponding level according to the severity level.

[0047] It should be noted that the severity level of the thickness reduction is determined according to the comparison result, and when the thickness reduction reaches 2.0mm, it is determined as a warning level. Then, the state warning information of the corresponding level is generated according to the severity level, including displaying a yellow warning icon on the monitoring interface, issuing an audible and visual alarm, and sending the warning information to the relevant operation and maintenance personnel through the short message platform.

[0048] In this embodiment, the thickness reduction is compared with a preset threshold to determine the severity level of the thickness reduction; and state warning information of a corresponding level is generated according to the severity level. In this embodiment, multi-level warning is performed through the severity level of the thickness reduction, so that the thickness reduction is found in time in the early stage, and the speed of finding the thickness reduction is improved.

[0049] For the purpose of understanding the implementation process of the boiler heating surface tube wall thinning monitoring method obtained after the above-mentioned embodiment one, an example is provided as follows: Figure 6 , Figure 6 A brief flowchart of a boiler heating surface tube wall thinning monitoring method is provided, specifically: collecting an original voltage signal V_out, performing digital filtering processing on the signal data, obtaining a voltage signal by selecting temperature auxiliary compensation, and substituting into a V_out-△d model calculation to obtain a tube wall thinning amount and update a database for display. By judging whether the tube wall thinning amount or the thinning rate exceeds a threshold value, a corresponding level alarm is triggered, and a record log and a push information are pushed.

[0050] It should be noted that the above examples are only used for understanding the present application and do not constitute a limitation on the boiler heating surface tube wall thinning monitoring method of the present application. More forms of simple transformation based on this technical concept are within the protection scope of the present application.

[0051] The present application also provides a boiler heating surface tube wall thinning monitoring device, which is described as follows: Figure 7 The boiler heating surface tube wall thinning monitoring device comprises: A providing module 10 is provided for providing an excitation current to a Wheatstone bridge through a constant current source, two adjacent bridge arms of the Wheatstone bridge are respectively composed of a reference section and a monitoring section on the same pipe of the boiler, and the other two adjacent bridge arms are composed of two fixed resistors; An obtaining module 20 is provided for obtaining first voltage data of the reference section and the monitoring section and second voltage data of the two fixed resistors from the Wheatstone bridge, and obtaining a voltage difference value according to the first voltage data and the second voltage data; A searching module 30 is provided for obtaining environmental data, and obtaining a tube wall thickness reduction amount of the monitoring section according to the environmental data, the voltage difference value, and a preset search table; The early warning module 40 is used to generate status early warning information based on the comparison result between the thickness reduction amount and the preset threshold.

[0052] This embodiment provides excitation current to a Wheatstone bridge via a constant current source. Two adjacent arms of the Wheatstone bridge consist of a reference section and a monitoring section on the same boiler pipe, respectively, while the other two adjacent arms consist of two fixed resistors. First voltage data of the reference section and the monitoring section, along with second voltage data of the two fixed resistors, are obtained from the Wheatstone bridge, and the voltage difference is calculated based on these two data. Environmental data is acquired, and the wall thickness reduction of the monitoring section is obtained based on the environmental data, the voltage difference, and a preset lookup table. A status warning is generated based on a comparison between the thickness reduction and a preset threshold. This embodiment improves the accuracy of boiler pipe wall thinning monitoring by setting the reference section and the monitoring section in parallel on the same pipe and employing the differential measurement principle of the Wheatstone bridge to convert the synchronous resistance change caused by temperature changes in the two pipe sections into a common-mode signal for suppression.

[0053] In one embodiment, the providing module 10 is further configured to generate a preset excitation current through a constant current source; apply the excitation current to the Wheatstone bridge circuit; monitor the stability of the excitation current; and perform calibration when the fluctuation of the excitation current exceeds the allowable range.

[0054] In one embodiment, the acquisition module 20 is further configured to perform differential amplification and filtering on the first voltage data and the second voltage data through a differential amplifier to obtain a first amplified voltage and a second amplified voltage; and to obtain a voltage difference based on the first amplified voltage and the second amplified voltage.

[0055] In one embodiment, the search module 30 is further configured to calculate the thinning rate based on the change time of the thickness reduction amount; compare the thinning rate with a preset rate threshold to obtain a rate comparison result; and generate a status warning information based on the rate comparison result.

[0056] In one embodiment, the early warning module 40 is further configured to compare the thickness reduction amount with a preset threshold to determine the severity level of the thickness reduction amount; and generate corresponding level status early warning information based on the severity level.

[0057] In one embodiment, the early warning module 40 is further configured to visually highlight the corresponding position of the thickness reduction amount on the three-dimensional boiler model; and synchronously display the status warning information at the corresponding position.

[0058] In an embodiment, the early warning module 40 is further configured to acquire historical data of the thickness reduction amount and generate a reduction trend curve; perform a remaining life prediction calculation based on the reduction trend curve and generate a monitoring report.

[0059] The boiler heating surface pipe wall thinning monitoring device provided by the present application adopts the boiler heating surface pipe wall thinning monitoring method in the above embodiments, and can solve the technical problem of how to improve the accuracy of boiler pipe wall thinning monitoring. Compared with the prior art, the boiler heating surface pipe wall thinning monitoring device provided by the present application has the same beneficial effects as the boiler heating surface pipe wall thinning monitoring method provided by the above embodiments, and other technical features in the boiler heating surface pipe wall thinning monitoring device are the same as the features disclosed in the above embodiments, which will not be repeated here.

[0060] The present application provides a boiler heating surface pipe wall thinning monitoring device, which comprises at least one processor and a memory in communication connection with the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the boiler heating surface pipe wall thinning monitoring method in the above embodiment one.

[0061] Reference will now be made to the following description Figure 8 which shows a structural diagram of a boiler heating surface pipe wall thinning monitoring device suitable for implementing the embodiments of the present application. The boiler heating surface pipe wall thinning monitoring device in the embodiments of the present application can include but is not limited to mobile terminals such as mobile phones, notebook computers, digital broadcast receivers, PDAs (Personal Digital Assistant), PADs (Portable Application Description), PMPs (Portable Multimedia Player), vehicle terminals (such as vehicle navigation terminals), and the like, as well as fixed terminals such as digital TVs, desktop computers, and the like. Figure 8 The boiler heating surface pipe wall thinning monitoring device shown is only an example, and should not impose any limitation on the functions and use range of the embodiments of the present application.

[0062] As Figure 8As shown, the boiler heating surface tube wall thinning monitoring device can include a processing device 1001 (e.g., a central processing unit, a graphics processing unit, etc.) that can perform various appropriate actions and processes according to programs stored in a ROM (Read Only Memory) 1002 or programs loaded from a storage device 1003 into a RAM (Random Access Memory) 1004. Various programs and data required for the operation of the boiler heating surface tube wall thinning monitoring device are also stored in the RAM 1004. The processing device 1001, the ROM 1002, and the RAM 1004 are connected to each other by a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Generally, the following systems can be connected to the I / O interface 1006: input devices 1007 including, for example, a touch screen, a touch pad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; output devices 1008 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; the storage device 1003 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 1009. The communication device 1009 can allow the boiler heating surface tube wall thinning monitoring device to communicate with other devices wirelessly or by wire to exchange data. Although the boiler heating surface tube wall thinning monitoring device with various systems is shown in the figure, it should be understood that all the systems shown are not required to be implemented or possessed. More or fewer systems can be alternatively implemented or possessed.

[0063] In particular, according to the embodiments disclosed in the present application, the processes described above with reference to the flowcharts can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product comprising a computer program carried on a computer readable medium, the computer program containing program codes for executing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network through the communication device, or installed from the storage device 1003, or installed from the ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the methods of the embodiments disclosed in the present application are performed.

[0064] The boiler heating surface tube wall thinning monitoring device provided by the present application adopts the boiler heating surface tube wall thinning monitoring method in the above-mentioned embodiments, and can solve the technical problem of how to improve the accuracy of boiler tube wall thinning monitoring. Compared with the prior art, the boiler heating surface tube wall thinning monitoring device provided by the present application has the same beneficial effects as the boiler heating surface tube wall thinning monitoring method provided by the above-mentioned embodiments, and other technical features in the boiler heating surface tube wall thinning monitoring device are the same as the features disclosed in the previous embodiment method, which will not be repeated here.

[0065] It should be understood that various aspects disclosed herein can be implemented in hardware, software, firmware, or a combination thereof. In the description above, specific features, structures, materials or characteristics can be combined in any suitable manner without necessarily being limited to cases where such features, structures, materials or characteristics are combined.

[0066] The above description is merely illustrative of the application and not restrictive.

[0067] The application provides a computer readable storage medium having stored thereon computer readable program instructions (i.e., a computer program) for performing the method of monitoring the tube wall thinning of the heating surface of a boiler as described above.

[0068] The computer readable storage medium provided by the application may, for example, be a U disk, but is not limited to an electric, magnetic, optical, electromagnetic, infrared, or semiconductor system, system, or device, or any combination thereof. More specific examples of the computer readable storage medium can include, but are not limited to, an electric connection having one or more conductive wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In the present embodiment, the computer readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, system, or device. The program code contained on the computer readable storage medium can be transmitted by any suitable medium, including but not limited to an electric wire, an optical cable, an RF (Radio Frequency), or the like, or any suitable combination thereof.

[0069] The above computer readable storage medium can be included in the tube wall thinning monitoring device of the heating surface of a boiler, or can exist separately without being assembled into the tube wall thinning monitoring device of the heating surface of a boiler.

[0070] The computer readable storage medium described above carries one or more programs, when the one or more programs are executed by the boiler heating surface pipe wall thinning monitoring device, the boiler heating surface pipe wall thinning monitoring device: a constant current source provides an excitation current to a Wheatstone bridge, two adjacent bridge arms of the Wheatstone bridge are composed of a reference section and a monitoring section on the same pipe of the boiler respectively, and the other two adjacent bridge arms are composed of two fixed resistors; the first voltage data of the reference section and the monitoring section and the second voltage data of the two fixed resistors are obtained from the Wheatstone bridge, and a voltage difference value is obtained according to the first voltage data and the second voltage data; environmental data is obtained, and a thickness thinning amount of the monitoring section is obtained according to the environmental data, the voltage difference value and a preset lookup table; and state warning information is generated based on a comparison result of the thickness thinning amount and a preset threshold.

[0071] Computer program code for carrying out operations of the present application can be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code can execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or the connection can be made to an external computer (for example, through the Internet using an Internet Service Provider).

[0072] The flow and block diagrams in the drawings show architectural, functional, and operational representations of possible implementations of systems, methods, and computer program products according to various embodiments of the present application. In this regard, each block in the flow and block diagrams can represent a module, a segment, or a portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that in some alternative implementations, the functions noted in the blocks can occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently or the blocks may be executed in the reverse order, depending on the functionality involved. It will also be noted that each block of the block diagrams and / or flowchart illustrations, and combinations thereof, can be implemented by special purpose hardware-based systems that perform the specified functions or operations, or combinations of special purpose hardware and computer instructions.

[0073] The modules described in the embodiments of the present application can be implemented in the form of software or in the form of hardware. In some cases, the name of the module does not constitute a limitation on the module itself.

[0074] The readable storage medium provided by the present application is a computer readable storage medium, which stores computer readable program instructions (i.e., a computer program) for executing the above-mentioned boiler heating surface tube wall thinning monitoring method, and can solve the technical problem of how to improve the accuracy of boiler tube wall thinning monitoring. Compared with the prior art, the computer readable storage medium provided by the present application has the same beneficial effects as the boiler heating surface tube wall thinning monitoring method provided by the above-mentioned embodiments, and will not be repeated here.

[0075] The present application also provides a computer program product comprising a computer program, which, when executed by a processor, implements the steps of the above-mentioned boiler heating surface tube wall thinning monitoring method.

[0076] The computer program product provided by the present application can solve the technical problem of how to improve the accuracy of boiler tube wall thinning monitoring. Compared with the prior art, the computer program product provided by the present application has the same beneficial effects as the boiler heating surface tube wall thinning monitoring method provided by the above-mentioned embodiments, and will not be repeated here.

[0077] The above-mentioned is only part of the embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation, direct / indirect application in other related technical fields made by using the content of the present application specification and drawings under the technical concept of the present application are included in the patent protection scope of the present application.

Claims

1. A method of monitoring the thinning of the tube wall of a boiler heating surface, characterized in that, The method comprises: a constant current source provides an excitation current to a Wheatstone bridge, two adjacent bridge arms of the Wheatstone bridge are respectively composed of a reference section and a monitoring section on the same pipeline of a boiler, and the other two adjacent bridge arms are composed of two fixed resistors; first voltage data of the reference section and the monitoring section and second voltage data of the two fixed resistors are obtained from the Wheatstone bridge, and a voltage difference value is obtained according to the first voltage data and the second voltage data; environmental data is obtained, and a thickness reduction amount of a pipe wall of the monitoring section is obtained according to the environmental data, the voltage difference value and a preset lookup table; state warning information is generated based on a comparison result of the thickness reduction amount and a preset threshold.

2. The method of claim 1, wherein, The step of providing an excitation current to the Wheatstone bridge by the constant current source comprises: a constant current source generates an excitation current of a preset size; the excitation current is applied to the Wheatstone bridge circuit; the stability of the excitation current is monitored, and calibration is performed when the fluctuation of the excitation current exceeds the allowed range.

3. The method of claim 1, wherein, The step of obtaining a voltage difference value according to the first voltage data and the second voltage data comprises: the first voltage data and the second voltage data are differentially amplified and filtered by a differential amplifier to obtain first amplified voltage and second amplified voltage; a voltage difference value is obtained according to the first amplified voltage and the second amplified voltage.

4. The method of claim 1, wherein, After the step of obtaining the thickness reduction amount of the pipe wall of the monitoring section, the method further comprises: a reduction rate is calculated according to the change time of the thickness reduction amount; the reduction rate is compared with a preset rate threshold to obtain a rate comparison result; state warning information is generated according to the rate comparison result.

5. The method of claim 1, wherein, The step of generating state warning information based on the comparison result of the thickness reduction amount and the preset threshold comprises: the thickness reduction amount is compared with the preset threshold to determine the severity level of the thickness reduction amount; state warning information of the corresponding level is generated according to the severity level.

6. The method of claim 1, wherein, After the step of generating state warning information based on the comparison result of the thickness reduction amount and the preset threshold, the method further comprises: the corresponding position of the thickness reduction amount on a three-dimensional boiler model is visually highlighted and positioned; the state warning information is synchronously displayed at the corresponding position.

7. The method of claim 1, wherein, After the step of generating state warning information based on the comparison result of the thickness reduction amount and the preset threshold, the method further comprises: historical data of the thickness reduction amount is obtained and a reduction trend curve is generated; residual life prediction calculation is performed based on the reduction trend curve, and a monitoring report is generated.

8. A device for on-line monitoring of thinning of a tube wall of a boiler heating surface, characterized in that The device comprises: a providing module for providing an excitation current to a Wheatstone bridge by a constant current source, two adjacent bridge arms of the Wheatstone bridge are respectively composed of a reference section and a monitoring section on the same pipeline of a boiler, and the other two adjacent bridge arms are composed of two fixed resistors; an obtaining module for obtaining first voltage data of the reference section and the monitoring section and second voltage data of the two fixed resistors from the Wheatstone bridge, and obtaining a voltage difference value according to the first voltage data and the second voltage data; The searching module is configured to acquire environment data, and obtain the wall thickness reduction of the monitoring section according to the environment data, the voltage difference and a preset searching table. The early warning module is configured to generate state early warning information based on a comparison result of the wall thickness reduction and a preset threshold.

9. A boiler heating surface tube wall thinning on-line monitoring apparatus, characterized by, The device comprises a memory, a processor and a computer program stored on the memory and executable on the processor, and the computer program is configured to implement the steps of the online monitoring method for wall thickness reduction of a boiler heating surface tube as claimed in any one of claims 1 to 7.

10. A storage medium, characterized by The storage medium is a computer readable storage medium, and the storage medium stores a computer program. When the computer program is executed by a processor, the online monitoring method for wall thickness reduction of a boiler heating surface tube as claimed in any one of claims 1 to 7 is implemented.

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