Laser ranging-based method, system, device, and storage medium for strain correction of heated surfaces

Abstract

This invention provides a method, system, device, and storage medium for strain correction of heated surfaces based on laser ranging, belonging to the field of inspection technology. The method for strain correction of heated surfaces based on laser ranging includes: selecting at least three actual units with different load fluctuations; conducting high-temperature creep tests on the actual units and preset experimental units to obtain data from the actual units and preset experimental units during the test phase; obtaining data from the actual units and preset experimental units at room temperature after the high-temperature creep test; calculating the strain correction coefficient of the heated surface tubes of the actual units based on the data from the actual units and preset experimental units during the test phase and the data from the actual units and preset experimental units at room temperature; and correcting the strain data of the heated surface tubes of the actual units based on the strain correction coefficient to determine the strain level of the heated surface tubes of the actual units. This invention enables the assessment of the strain level of the unit, avoiding the problem of tube rupture and leakage when the strain level of the heated surface tubes is relatively low.

Description

Technical Field

[0001] This invention relates to the field of supervision and inspection technology for heating surface tubes of power plant boilers, specifically to a method for correcting strain of heating surface tubes based on laser ranging, a system for correcting strain of heating surface tubes of a unit, an electronic device, and a readable storage medium. Background Technology

[0002] The boiler heating surface is an important heat exchange component of a thermal power unit. During operation, the heating surface tubes are subjected to complex stresses and the surrounding environment is harsh, making them prone to leakage. This is the most important part that causes unscheduled shutdowns of thermal power units.

[0003] With the adjustment and requirements of national policies in recent years, most units have participated in peak shaving. Peak shaving has increased the load fluctuation of the units and changed the stress on the heating surface. Due to the frequent load fluctuations caused by frequent peak shaving, the strain level of the heating surface tubes has become unpredictable, which can easily cause tube rupture and leakage when the strain level is relatively low. Summary of the Invention

[0004] The purpose of this invention is to provide a method, system, device, and storage medium for correcting the strain of heated surfaces based on laser ranging, in order to solve the problem that the strain level of heated surfaces cannot be assessed due to frequent peak shaving by the unit.

[0005] To achieve the above objectives, embodiments of the present invention provide a method for correcting the strain of a heated surface based on laser ranging, comprising:

[0006] Select at least three actual generating units with different load fluctuations;

[0007] High-temperature creep tests were conducted on the actual unit and the preset experimental unit to obtain the actual unit data and the elongation of the preset experimental unit during the test phase. Based on the actual unit data and the elongation of the preset experimental unit during the test phase, the strain data of the actual unit and the strain data of the preset experimental unit during the test phase were calculated.

[0008] After the high-temperature creep test, the actual unit data and the elongation of the preset test unit at room temperature are obtained, and the strain data of the actual unit and the strain data of the preset test unit at room temperature are calculated based on the actual unit data and the elongation of the preset test unit at room temperature.

[0009] Based on the elongation and strain data of the actual unit and the preset experimental unit in the test phase and the elongation and strain data of the actual unit and the preset experimental unit in the normal temperature phase, the strain correction coefficient of the actual unit's heated surface tube is calculated.

[0010] The strain data of the actual unit's heating surface tubes are corrected based on the strain correction coefficient to determine the strain level of the actual unit's heating surface tubes.

[0011] Optionally, before conducting the high-temperature creep test on the actual unit and the preset experimental unit, the method further includes:

[0012] At least two first identification points are set in the actual unit;

[0013] At least two second marker points are set in the preset experimental unit; wherein the spacing between the first marker points is equal to the spacing between the second marker points.

[0014] Optionally, the step of conducting high-temperature creep tests on the actual unit and the preset experimental unit to obtain the actual unit data and the elongation of the preset experimental unit during the test phase, and calculating the strain data of the actual unit and the strain data of the preset experimental unit during the test phase based on the actual unit data and the elongation of the preset experimental unit during the test phase, includes:

[0015] High-temperature creep tests were conducted on the actual unit and the preset experimental unit respectively to obtain the elongation of the distance between the first marker points and the elongation of the distance between the second marker points during the test phase.

[0016] Based on the elongation of the spacing between the first marker points during the test phase, the actual strain data of the unit's heated surface during the test phase are calculated.

[0017] Based on the elongation of the spacing between the second marker points during the test phase, the strain data of the pre-set experimental unit's heated surface during the test phase are calculated.

[0018] Optionally, the step of calculating the actual strain data of the unit's heated surface during the test phase based on the elongation of the distance between the first marker points during the test phase includes:

[0019] Based on the elongation of the distance between the first marker points during the test phase, the distance between the first marker points, and Formula 1, the actual strain data of the unit's heated surface during the test phase are calculated:

[0020]

[0021] Where a is the strain data of the unit's heated surface, L is the elongation of the distance between the first marker points, and d is the initial distance between the first marker points.

[0022] Optionally, the step of obtaining the actual unit data and the elongation of the preset experimental unit at room temperature after the high-temperature creep test, and calculating the actual unit strain data and the preset experimental unit strain data at room temperature based on the actual unit data and the elongation of the preset experimental unit at room temperature, includes:

[0023] Obtain the elongation of the spacing between the first marker points at room temperature;

[0024] Obtain the elongation of the spacing between the second marker points at room temperature;

[0025] Based on the elongation of the distance between the first marker points at room temperature, the actual strain data of the unit's heated surface at room temperature is calculated.

[0026] Based on the elongation of the distance between the second marker points at room temperature, the strain data of the pre-set experimental unit's heated surface at room temperature are calculated.

[0027] Optionally, the step of calculating the strain correction coefficient of the actual unit's heated surface tubes based on the actual unit data and preset experimental unit data during the test phase and the actual unit data and preset experimental unit data during the ambient temperature phase includes:

[0028] Based on the actual unit heat-receiving surface strain data during the test phase, the pre-set experimental unit heat-receiving surface strain data during the test phase, the actual unit heat-receiving surface strain data during the ambient temperature phase, the pre-set experimental unit heat-receiving surface strain data during the ambient temperature phase, and Formula 2, the strain correction coefficient of the actual unit heat-receiving surface tube is calculated:

[0029]

[0030] Where Δ is the strain correction coefficient of the unit, a′ 常 The strain data of the heated surface of the pre-set experimental unit during the ambient temperature stage, a′ 试 The strain data of the pre-set experimental unit's heated surface during the aforementioned test phase, a 常 The actual strain data of the unit's heated surface during the ambient temperature stage, a 试 The data refers to the actual strain data of the heated surface of the unit during the test phase.

[0031] Optionally, after correcting the strain data of the actual unit's heating surface tubes according to the strain correction coefficient to determine the strain level of the actual unit's heating surface tubes, the method further includes:

[0032] Based on the strain level of the actual unit's heating surface tubes, the remaining lifespan of the actual unit's heating surface tubes is calculated.

[0033] Based on the remaining lifespan of the actual unit's heating surface tubes, a replacement strategy for the actual unit's heating surface tubes is determined.

[0034] In a second aspect of the present invention, a strain correction system for a heated surface based on laser ranging is provided. The system includes a laser rangefinder, a high-temperature creep testing machine, and a controller.

[0035] The controller is used to select at least three actual generating units with different load fluctuations;

[0036] The laser rangefinder is used to obtain the elongation of the actual unit and the preset experimental unit during the test phase; it is also used to obtain the elongation of the actual unit and the preset experimental unit during the room temperature phase.

[0037] The high-temperature creep testing machine is used to conduct high-temperature creep tests on the actual unit and the preset experimental unit;

[0038] The controller is further configured to calculate the strain data of the actual unit and the preset experimental unit during the test phase based on the elongation of the actual unit and the preset experimental unit during the test phase; to calculate the strain data of the actual unit and the preset experimental unit during the room temperature phase based on the data of the actual unit and the elongation of the preset experimental unit during the room temperature phase; to calculate the strain correction coefficient of the actual unit's heating surface tube based on the elongation and strain data of the actual unit and the preset experimental unit during the test phase and the elongation and strain data of the actual unit and the preset experimental unit during the room temperature phase; and to correct the strain data of the actual unit's heating surface tube based on the strain correction coefficient to determine the strain level of the actual unit's heating surface tube.

[0039] A third aspect of this application provides an electronic device configured to perform the above-described laser ranging-based strain correction method for heated surfaces.

[0040] A fourth aspect of this application provides a machine-readable storage medium storing instructions that, when executed by a processor, are configured by the processor to perform the aforementioned laser ranging-based strain correction method for heated surfaces.

[0041] This invention involves selecting at least three actual units with different load fluctuations from the actual operating units, and simultaneously conducting high-temperature creep tests on both the actual units and a pre-set experimental unit. The results are used to obtain data on the actual units and the elongation of the pre-set experimental unit during the testing phase. Based on the elongation of the actual units and the pre-set experimental unit during the testing phase, strain data for both units are calculated. Then, the elongation of the actual units and the pre-set experimental unit at room temperature after the high-temperature creep test is obtained, and strain data for both units at room temperature is calculated. Furthermore, based on the elongation and strain data of the actual units and the pre-set experimental unit during the testing phase and at room temperature, a strain correction coefficient for the heating surface tubes of the actual units is calculated. Finally, the strain data of the heating surface tubes of the actual units is corrected based on the strain correction coefficient to determine the strain level of the heating surface tubes of the actual units.

[0042] In this embodiment of the invention, multiple units under different load fluctuations are selected, and a set of experimental units is set up. High-temperature creep tests are conducted on both the experimental and actual units to obtain data from the actual and experimental units during the experimental phase and data from the actual and experimental units during the normal temperature phase. Based on the above data, strain correction coefficients under different load fluctuations are further obtained. Furthermore, the strain of the corresponding load fluctuations can be corrected according to the strain correction coefficients of different load fluctuations. Based on the strain of the heated pipes under different load fluctuations after correction, the strain level of the heated pipes can be determined, avoiding the problem of pipe rupture and leakage when the strain level of the heated surface pipes is relatively low. Moreover, the invention considers the data of both experimental and actual units, and has a high degree of matching with actual operating conditions, thus improving its practicality.

[0043] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0044] The accompanying drawings are provided to further illustrate embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. In the drawings:

[0045] Figure 1 This is a schematic flowchart of an embodiment of the method for correcting the strain of the heated surface of the unit according to the present invention;

[0046] Figure 2 This is a curve of the strain correction coefficient of the actual unit;

[0047] Figure 3 This is a schematic diagram of the architecture of the unit's heat-receiving surface strain correction system involved in this application. Detailed Implementation

[0048] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this application.

[0050] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0051] Example 1

[0052] Please refer to Figure 1 , Figure 1 This is a schematic diagram of a method for correcting the strain of a heated surface based on laser ranging, provided in this embodiment.

[0053] Step S100: Select at least three actual generating units with different load fluctuations.

[0054] It should be understood that this embodiment selects units of the same type that are actually in operation, and selects units of the same type with different load fluctuations. For example, it selects units with high-frequency load fluctuations, units with medium-frequency load fluctuations, and units with low-frequency load fluctuations.

[0055] Step S200: Conduct high-temperature creep tests on the actual unit and the preset experimental unit to obtain the actual unit data and the elongation of the preset experimental unit during the test phase. Based on the actual unit data and the elongation of the preset experimental unit during the test phase, calculate the strain data of the actual unit and the preset experimental unit during the test phase.

[0056] Elongation is used to characterize the degree of deformation that occurs in a unit at high temperatures.

[0057] It is understandable that before conducting high-temperature creep tests on the actual unit and the preset experimental unit, since the components of the actual unit have a certain degree of wear before current operation, and since this embodiment analyzes and processes the data of the actual unit and the preset experimental unit together, it is necessary to replace the components in the actual unit with the same components as the preset experimental unit to ensure the referenceability of the subsequent data.

[0058] The pre-set experimental unit is a unit that operates under ideal conditions and is of the same type as the actual unit.

[0059] High-temperature creep testing is a material property test that measures the gradual plastic deformation of materials under high temperature and stress. For example, actual units and pre-designed experimental units undergo high-temperature creep testing, resulting in deformation. The deformation data of the actual units and pre-designed experimental units are collected and calculated to obtain the actual unit data and the pre-designed experimental unit data.

[0060] It is worth mentioning that in this embodiment, a rangefinder was installed at a suitable location on the high-temperature creep testing machine to observe the deformation of the unit.

[0061] Specifically, in this embodiment, at least two marker points are set on the actual unit and the preset experimental unit, and the spacing between the marker points of the actual unit and the preset experimental unit is set to the same spacing to ensure that the initial data of the actual unit and the preset experimental unit are consistent.

[0062] In one specific embodiment, step S200 includes:

[0063] Step S203: Conduct high-temperature creep tests on the actual unit and the preset experimental unit respectively, and obtain the elongation of the distance between the first marker points and the distance between the second marker points during the test phase.

[0064] It is understandable that the unit will deform after the high temperature creep test, and the spacing between the initial marker points will also change due to the deformation. This step is to use a laser rangefinder to measure the spacing between the current marker points of the unit, and then upload the current spacing between the marker points to the computer for data processing. The computer compares the current spacing between the marker points with the initial spacing of the unit's marker points and calculates the elongation of the current spacing between the unit's marker points.

[0065] Step S204: Calculate the actual strain data of the unit's heated surface during the test phase based on the elongation of the distance between the first marker points during the test phase.

[0066] Step S205: Calculate the strain data of the pre-set experimental unit's heated surface during the test phase based on the elongation of the distance between the second marker points during the test phase.

[0067] It should be noted that the calculation process for the actual unit's heat transfer surface strain data and the preset experimental unit's heat transfer surface strain data is the same. Specifically, in this embodiment, based on the elongation of the spacing between the marker points during the test phase and the initial spacing between the marker points, the heat transfer surface strain data during the test phase is calculated using Formula 1. Formula 1 is as follows:

[0068]

[0069] Where a represents the strain data of the unit's heated surface, L represents the elongation of the distance between the marker points, and d represents the initial distance between the marker points.

[0070] This embodiment obtains the elongation of the distance between the first and second marker points during the test phase by conducting high-temperature creep tests on the actual unit and the preset test unit, respectively. Then, based on the elongation of the distance between the first and second marker points during the test phase, the strain data of the heated surface of the actual unit and the strain data of the heated surface of the preset test unit are calculated, providing a data basis for the subsequent calculation of the strain correction coefficient.

[0071] Step S300: Obtain the actual unit data and the elongation of the preset test unit at room temperature after the high temperature creep test, and calculate the strain data of the actual unit and the preset test unit at room temperature based on the actual unit data and the elongation of the preset test unit at room temperature.

[0072] It is understandable that the components of the generator set will deform during the cooling process after being exposed to high temperatures. Therefore, it is necessary to consider the actual generator set data and the preset generator set data at the normal temperature stage.

[0073] In one specific embodiment, step S300 includes:

[0074] Step S301: Obtain the elongation of the distance between the first marker points at room temperature.

[0075] Step S302: Obtain the elongation of the distance between the second marker points at room temperature.

[0076] Specifically, a laser rangefinder can be used to measure the distance between marker points after the unit has cooled to room temperature following a high-temperature creep test. The distance between the current marker points is then transmitted to a computer for data processing. The computer compares the current distance between the marker points with the initial distance to calculate the elongation of the distance between the marker points at room temperature.

[0077] Step S303: Calculate the actual strain data of the unit's heated surface at room temperature based on the elongation of the distance between the first marker points at room temperature.

[0078] Step S304: Calculate the strain data of the pre-set experimental unit's heated surface at room temperature based on the elongation of the distance between the second marker points at room temperature.

[0079] It is understood that the calculation of strain data of the unit's heated surface in steps S303 and S304 is consistent with the calculation of strain data of the unit's heated surface in step S205 of the above embodiment.

[0080] This embodiment obtains the elongation of the distance between the first marker points and the distance between the second marker points at room temperature. Based on the elongation of the distance between the first marker points at room temperature, the actual strain data of the unit's heated surface at room temperature is calculated. Based on the elongation of the distance between the second marker points at room temperature, the strain data of the preset experimental unit's heated surface at room temperature is calculated, providing a data basis for subsequent calculation of the strain correction coefficient.

[0081] Step S400: Based on the elongation and strain data of the actual unit and the preset experimental unit during the test phase, and the elongation and strain data of the actual unit and the preset experimental unit during the normal temperature phase, calculate the strain correction coefficient of the heating surface tube of the actual unit.

[0082] Specifically, based on the actual unit data and preset experimental unit data during the experimental phase, and the actual unit data and preset experimental unit data during the normal temperature phase, the strain correction coefficient of the actual unit's heated surface tubes is calculated using Formula 2, as shown below:

[0083]

[0084] Where Δ is the strain correction factor of the unit, a′ 常 The strain data of the heated surface of the pre-set experimental unit at room temperature, a′ 试 For the pre-set experimental unit heat transfer surface strain data during the test phase, a 常 This refers to the actual strain data of the unit's heated surfaces at ambient temperature. 试 This is the actual strain data of the heated surface of the unit during the test phase.

[0085] Step S500: Correct the strain data of the actual unit's heating surface tubes according to the strain correction coefficient, and determine the strain level of the actual unit's heating surface tubes.

[0086] Understandably, due to frequent peak shaving by the generating units, the unit's strain is affected. This embodiment calculates the unit strain correction coefficients for multiple different load fluctuations, and can generate a strain correction coefficient curve based on these coefficients (e.g., ...). Figure 2 As shown in the figure, based on the strain correction coefficient curve, the strain correction coefficient of the current load fluctuation can be estimated intuitively. Then, the strain of the unit is corrected according to the strain correction coefficient to achieve the assessment of the strain level of the heated surface tube.

[0087] It is important to understand that after calculating the unit's strain data, in order to determine whether the unit's heating surface tubes can continue to operate and to avoid the problem of heating tubes bursting due to excessively low strain levels, it is necessary to calculate the remaining life of the actual unit's heating surface tubes based on the strain data calculated above. Based on the remaining life of the heating surface tubes, it is necessary to decide whether to replace the heating surface tubes.

[0088] This embodiment selects at least three actual units with different load fluctuations from the actual operating units, and simultaneously conducts high-temperature creep tests on the actual units and the preset experimental units. It obtains the data of the actual units and the elongation of the preset experimental units during the test phase. Based on the elongation of the actual units and the preset experimental units during the test phase, it calculates the strain data of the actual units and the preset experimental units during the test phase. Then, it obtains the elongation of the actual units and the preset experimental units at room temperature after the high-temperature creep test, and calculates the strain data of the actual units and the preset experimental units at room temperature. Furthermore, based on the elongation and strain data of the actual units and the preset experimental units during the test phase and the elongation and strain data at room temperature, it calculates the strain correction coefficient of the heating surface tubes of the actual units. Finally, it corrects the strain data of the heating surface tubes of the actual units based on the strain correction coefficient, and determines the strain level of the heating surface tubes of the actual units. It can assess the strain level of the actual unit, avoiding the problem of tube rupture and leakage when the strain level of the heated surface tube is relatively low. In addition, this embodiment considers the data of both the experimental unit and the actual unit, and has a high degree of matching with the actual operating conditions, thus improving its practicality.

[0089] Example 2

[0090] Please refer to Figure 3 , Figure 3 This is a schematic diagram of the architecture of a laser ranging heated surface strain correction system provided in an embodiment of this application.

[0091] like Figure 3 As shown, the laser ranging heated surface strain correction system includes a laser rangefinder 10, a high-temperature creep testing machine 20, a controller 30, and a unit 40.

[0092] The laser rangefinder 10 is an instrument that measures the distance to a target by modulating a laser with a specific parameter. It can be a laser rangefinder sensor, such as the MSE-LT200. The laser rangefinder 10 is installed in a suitable position on the high-temperature creep testing machine 20 and is connected to the controller 30. During operation, the laser rangefinder 10 measures the distance between the marker points 50 of the unit 40 during the operation of the high-temperature creep testing machine 20 to obtain the elongation of the unit 40 during the testing phase. This elongation information is then sent to the controller 30 to support the controller 30 in calculating the strain data of the unit 40 during the testing phase. Furthermore, after the high-temperature creep testing machine 20 stops operating, the laser rangefinder 10 measures the distance between the marker points 50 of the unit 40 at room temperature to obtain the elongation of the unit 40 at room temperature. This elongation information is then sent to the controller 30 to support the controller 30 in calculating the strain data of the unit 40 at room temperature.

[0093] The high-temperature creep testing machine 20 is used to conduct high-temperature creep tests on actual units and preset experimental units. The high-temperature creep testing machine 20 is connected to the controller 30. During operation, after receiving the start command issued by the controller 30, the high-temperature creep testing machine 20 conducts a high-temperature creep test on the unit 40. After receiving the end command issued by the controller 30, the high-temperature creep test ends.

[0094] The controller 30 can be a computer, and it is connected to the laser rangefinder 10 and the high-temperature creep testing machine 20. During operation, the controller 30 issues an start command, causing the high-temperature creep testing machine 20 to start the high-temperature creep test on the unit 40. It receives the elongation of the unit 40 during the test phase from the laser rangefinder 10, calculates the strain data of the unit 40 during the test phase based on the elongation, and issues an end command, causing the high-temperature creep testing machine 20 to end the high-temperature creep test. It then receives the elongation of the unit 40 at room temperature from the laser rangefinder 10, calculates the strain data of the unit 40 at room temperature based on the elongation and strain data of the unit 40 during the test phase and the elongation and strain data of the unit 40 at room temperature, calculates the strain correction coefficient of the heated surface tube of the unit 40, and corrects the strain data of the unit 40 based on the strain correction coefficient to determine the strain level.

[0095] Example 3

[0096] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0097] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0098] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0099] Example 4

[0100] This invention also provides a computer-readable storage medium storing instructions that, when executed by a processor, are adapted to execute a program having steps of a laser ranging-based method for correcting strain on a heated surface.

[0101] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0102] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0103] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0104] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0105] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the embodiments of the present invention will not describe the various possible combinations separately.

[0106] In addition, the functional modules in the various embodiments of this application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0107] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0108] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A method for correcting strain on a heated surface based on laser ranging, characterized in that, include: Select at least three actual generating units with different load fluctuations; among them, select the same type of generating units with different load fluctuations from those that are actually in operation. High-temperature creep tests were conducted on the actual unit and the preset experimental unit to obtain the actual unit data and the elongation of the preset experimental unit during the test phase. Based on the actual unit data and the elongation of the preset experimental unit during the test phase, the strain data of the actual unit and the preset experimental unit during the test phase were calculated. After the high-temperature creep test, the actual unit data and the elongation of the preset test unit at room temperature are obtained, and the strain data of the actual unit and the preset test unit at room temperature are calculated based on the actual unit data and the elongation of the preset test unit at room temperature. Based on the elongation and strain data of the actual unit and the preset experimental unit in the test phase and the elongation and strain data of the actual unit and the preset experimental unit in the normal temperature phase, the strain correction coefficient of the actual unit's heated surface tube is calculated. The strain data of the actual unit's heating surface tubes are corrected based on the strain correction coefficient to determine the strain level of the actual unit's heating surface tubes. Also includes: By calculating the strain correction coefficients of the units under different load fluctuations, a strain correction coefficient curve is plotted based on the strain correction coefficients of the units under different load fluctuations. Based on the strain correction coefficient curve, the strain correction coefficient of the current load fluctuation is estimated, and then the unit strain is corrected according to the strain correction coefficient. The calculated strain correction coefficients for the actual unit's heated surface tubes include: Based on the actual unit heat-receiving surface strain data during the test phase, the pre-set experimental unit heat-receiving surface strain data during the test phase, the actual unit heat-receiving surface strain data during the ambient temperature phase, the pre-set experimental unit heat-receiving surface strain data during the ambient temperature phase, and Formula 2, the strain correction coefficient of the actual unit heat-receiving surface tube is calculated: ， in, This is the strain correction factor for the unit. This refers to the strain data of the heated surface of the pre-set experimental unit during the ambient temperature stage. This refers to the strain data of the pre-set experimental unit's heated surface during the aforementioned test phase. The data represents the actual strain of the unit's heated surfaces during the ambient temperature stage. The data refers to the actual strain data of the heated surface of the unit during the test phase.

2. The method for correcting strain on a heated surface based on laser ranging according to claim 1, characterized in that, Before conducting the high-temperature creep test on the actual unit and the preset experimental unit, the method further includes: At least two first identification points are set in the actual unit; At least two second marker points are set in the preset experimental unit; wherein the spacing between the first marker points is equal to the spacing between the second marker points.

3. The method for correcting strain on a heated surface based on laser ranging according to claim 2, characterized in that, The process involves conducting high-temperature creep tests on the actual unit and the preset experimental unit to obtain data on the actual unit and elongation of the preset experimental unit during the test phase. Based on these data, strain data for both the actual unit and the preset experimental unit are calculated, including: High-temperature creep tests were conducted on the actual unit and the preset experimental unit respectively to obtain the elongation of the distance between the first marker points and the elongation of the distance between the second marker points during the test phase. Based on the elongation of the spacing between the first marker points during the test phase, the actual strain data of the unit's heated surface during the test phase are calculated. Based on the elongation of the spacing between the second marker points during the test phase, the strain data of the pre-set experimental unit's heated surface during the test phase are calculated.

4. The method for correcting strain on a heated surface based on laser ranging according to claim 3, characterized in that, The calculation of the actual unit heat-receiving surface strain data during the test phase based on the elongation of the distance between the first marker points during the test phase includes: Based on the elongation of the distance between the first marker points during the test phase, the distance between the first marker points, and Formula 1, the actual strain data of the unit's heated surface during the test phase are calculated: ， in, The data represents the strain of the unit's heated surface, where L is the elongation of the distance between the first marker points and d is the initial distance between the first marker points.

5. The method for correcting strain on a heated surface based on laser ranging according to claim 4, characterized in that, The process of obtaining the actual unit data and the elongation of the preset experimental unit at room temperature after the high-temperature creep test, and calculating the actual unit strain data and the preset experimental unit strain data at room temperature based on the actual unit data and the elongation of the preset experimental unit at room temperature, includes: Obtain the elongation of the spacing between the first marker points at room temperature; Obtain the elongation of the spacing between the second marker points at room temperature; Based on the elongation of the distance between the first marker points at room temperature, the actual strain data of the unit's heated surface at room temperature is calculated. Based on the elongation of the distance between the second marker points at room temperature, the strain data of the pre-set experimental unit's heated surface at room temperature are calculated.

6. The method for correcting strain on a heated surface based on laser ranging according to claim 1, characterized in that, After correcting the strain data of the actual unit's heating surface tubes according to the strain correction coefficient and determining the strain level of the actual unit's heating surface tubes, the method further includes: Based on the strain level of the actual unit's heating surface tubes, the remaining lifespan of the actual unit's heating surface tubes is calculated. Based on the remaining lifespan of the actual unit's heating surface tubes, a replacement strategy for the actual unit's heating surface tubes is determined.

7. A strain correction system for a heated surface based on laser ranging, characterized in that, The system includes a laser rangefinder, a high-temperature creep testing machine, and a controller, comprising: The controller is used to select at least three actual generating units with different load fluctuations; wherein, among the generating units of the same type that are actually in operation, the generating units of the same type with different load fluctuations are selected. The laser rangefinder is used to obtain the elongation of the actual unit and the preset experimental unit during the test phase; it is also used to obtain the elongation of the actual unit and the preset experimental unit during the room temperature phase. The high-temperature creep testing machine is used to conduct high-temperature creep tests on the actual unit and the preset experimental unit; The controller is further configured to calculate the strain data of the actual unit and the preset experimental unit during the test phase based on the elongation of the actual unit and the preset experimental unit during the test phase; to calculate the strain data of the actual unit and the preset experimental unit during the room temperature phase based on the actual unit data and the elongation of the preset experimental unit during the room temperature phase; to calculate the strain correction coefficient of the actual unit's heating surface tube based on the elongation and strain data of the actual unit and the preset experimental unit during the test phase and the elongation and strain data of the actual unit and the preset experimental unit during the room temperature phase; and to correct the strain data of the actual unit's heating surface tube based on the strain correction coefficient to determine the strain level of the actual unit's heating surface tube. The controller is also used for: By calculating the strain correction coefficients of the units under different load fluctuations, a strain correction coefficient curve is plotted based on the strain correction coefficients of the units under different load fluctuations. Based on the strain correction coefficient curve, the strain correction coefficient of the current load fluctuation is estimated, and then the unit strain is corrected according to the strain correction coefficient. The calculated strain correction coefficients for the actual unit's heated surface tubes include: Based on the actual unit heat-receiving surface strain data during the test phase, the pre-set experimental unit heat-receiving surface strain data during the test phase, the actual unit heat-receiving surface strain data during the ambient temperature phase, the pre-set experimental unit heat-receiving surface strain data during the ambient temperature phase, and Formula 2, the strain correction coefficient of the actual unit heat-receiving surface tube is calculated: ， in, This is the strain correction factor for the unit. This refers to the strain data of the heated surface of the pre-set experimental unit during the ambient temperature stage. This refers to the strain data of the pre-set experimental unit's heated surface during the aforementioned test phase. The data represents the actual strain of the unit's heated surfaces during the ambient temperature stage. The data refers to the actual strain data of the heated surface of the unit during the test phase.

8. An electronic device, characterized in that, include: A processor and a memory, the memory storing machine-readable instructions executable by the processor, which, when executed by the processor, perform the strain correction method for heated surfaces based on laser ranging as described in any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores instructions for causing a machine to perform the laser ranging-based strain correction method for heated surfaces as described in any one of claims 1-6.

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