A precise temperature measurement system and method for absorber tube panels

Abstract

This invention discloses a precise temperature measurement system and method for absorber tube screens, comprising: an absorber; an infrared temperature monitoring system for acquiring infrared images of the circumferential surface of the absorber and transmitting these images to a concentrating solar collector control system to monitor the temperature of the absorber tube screens and the gap area; a concentrating solar collector control system for receiving the infrared images sent by the infrared temperature monitoring system, judging the temperature status of the absorber based on the infrared images, and triggering prompts; the concentrating solar collector control system includes a tube screen area division module and a gap temperature filtering module; the tube screen area division module is used to identify and mark the boundaries of each absorber tube screen based on the infrared images; the gap temperature filtering module is used to identify the gap area based on the infrared images using an image recognition algorithm, and filter and remove abnormally high temperature points in the gap area, thereby improving the accuracy of absorber temperature monitoring and enhancing the efficiency and safety of the temperature measurement system.

Description

Technical Field

[0001] This invention relates to the field of heat absorber technology, and in particular to a precise temperature measurement system and method for heat absorber tubes and screens. Background Technology

[0002] The principle of tower solar thermal power generation technology is to reflect sunlight to a solar absorber through heliostats. The coating on the surface of the absorber tubes converts solar energy into heat energy and transfers it to the molten salt inside the tubes, thus achieving energy concentration and conversion. Due to material limitations, the absorber tubes need to be controlled within a certain temperature range. The operation and control of the concentrating solar collector system in a tower solar thermal power plant are highly dependent on the monitoring of the absorber tube temperature.

[0003] Currently, the temperature of the receiver tubes is mainly monitored by infrared cameras. Once the infrared camera detects that the temperature of the receiver surface exceeds the preset safe temperature, it will trigger an over-temperature alarm. However, during the installation of the receiver, there are gaps between the tubes, and the temperature changes at these gaps are significant. This can easily cause the control system to misjudge the receiver over-temperature, and even lead to frequent over-temperature removal, which seriously affects the normal operation of the receiver. Summary of the Invention

[0004] The purpose of this invention is to provide a method for accurate temperature measurement of absorber tubes and screens, which can extend the life of the absorber, ensure the safe and stable operation of the power plant, improve the utilization rate of solar energy, and enhance the economic benefits of solar thermal power plants.

[0005] This invention provides a precise temperature measurement system for absorber tube panels, comprising:

[0006] The heat absorber includes several heat-absorbing tube screens and protective plates respectively disposed above and below the heat-absorbing tube screens, and the gap between each heat-absorbing tube screen is a gap area;

[0007] An infrared temperature monitoring system is communicatively connected to a concentrated solar thermal control system. It is used to acquire infrared images of the circumferential surface of the absorber and transmit the infrared images to the concentrated solar thermal control system to monitor the temperature of the absorber tube screen and the gap area.

[0008] The concentrating solar thermal control system is used to receive the infrared image sent by the infrared temperature monitoring system, judge the temperature status of the absorber based on the infrared image, and trigger a prompt when the temperature status of the absorber is abnormal.

[0009] The concentrating solar thermal control system includes a tube screen area division module and a gap temperature filtering module. The tube screen area division module is used to identify and mark the boundaries of each heat-absorbing tube screen based on the infrared image. The gap temperature filtering module is used to identify the gap area based on the infrared image using an image recognition algorithm, and filter and remove abnormal high-temperature points in the gap area.

[0010] Preferably, at least two infrared generating tubes are provided for each of the slit regions, and the infrared generating tubes are located on the center extension line of the slit region; the tube screen region division module divides the left and right boundaries of each heat-absorbing tube screen by identifying the position of the infrared generating tubes in each of the slit regions in the infrared image; the tube screen region division module determines the upper and lower boundaries of each heat-absorbing tube screen by using a boundary recognition algorithm based on the obvious temperature change between the heat-absorbing tube screen and the protective plate in the infrared image.

[0011] Preferably, the infrared generator operates in the mid-infrared band, and the infrared generator has the same temperature measurement range as the infrared temperature monitoring system.

[0012] Preferably, the gap temperature filtering module is used to identify the location of the infrared generating tube in each gap region of the infrared image through an image recognition algorithm, thereby determining each gap region, and to identify and remove abnormal high temperature points in the gap region through a temperature gradient algorithm.

[0013] Preferably, the gap area is provided with a high-temperature resistant protective layer, which includes a metal mesh skeleton and a solidifiable high-temperature resistant protective material filled in the metal mesh skeleton.

[0014] Preferably, the gap area is provided with a high-temperature resistant protective layer, the high-temperature resistant protective layer comprising a molded filling material, the molded filling material being arranged in a tile-like shape within the gap area.

[0015] Preferably, the infrared temperature monitoring system includes several infrared cameras for acquiring infrared images of the circumferential surface of the absorber and transmitting the infrared images to the concentrating solar thermal control system.

[0016] Preferably, the circumferential surface of the heat absorber is divided into several continuous independent test areas along its circumference, and each independent test area is non-overlapping, with at least two infrared cameras corresponding to each independent test area; or,

[0017] The circumferential surface of the heat absorber is divided into several test areas along its circumference. Any two adjacent test areas partially overlap. Furthermore, any one of the test areas is taken as a feature test area. The merged test area formed by two test areas adjacent to the feature test area can completely cover the feature test area. At least one infrared camera is provided for each test area.

[0018] This invention provides a method for accurate temperature measurement of a heat absorber tube screen, comprising:

[0019] Infrared images of the heat absorber from different positions were collected;

[0020] Based on the infrared image, identify each heat-absorbing tube screen in the heat absorber and the gap area between two adjacent heat-absorbing tube screens. Use a temperature gradient algorithm to identify abnormal high-temperature points in the gap area and filter and remove the abnormal high-temperature points.

[0021] The temperature status of the absorber is judged based on the temperature data of the absorber after filtering and removing the abnormal high temperature points, and a prompt is triggered when the temperature status of the absorber is abnormal.

[0022] Preferably, the method for identifying abnormal high-temperature points includes:

[0023] A1: Identify all characteristic high-temperature points within the gap area using a temperature gradient algorithm, wherein the temperature of each characteristic high-temperature point is higher than the temperature of any point directly adjacent to the characteristic high-temperature point within the gap area;

[0024] A2: Taking any one of the characteristic high-temperature points as the center, a circular area is defined with a preset radius. The area where the circular area and the gap area overlap is the characteristic area. All the characteristic high-temperature points located in the characteristic area are arranged in order of temperature from high to low. The first N characteristic high-temperature points are selected, and the average temperature T of the selected first N characteristic high-temperature points is calculated.

[0025] A3: The two heat-absorbing tube screens adjacent to the gap area are the first heat-absorbing tube screen and the second heat-absorbing tube screen, respectively;

[0026] Arrange the points in the first heat-absorbing tube screen in order of temperature from high to low, and calculate the average temperature T1 of the first N points in the first tube screen;

[0027] Arrange the points in the second heat absorption tube screen in order of temperature from high to low, and calculate the average temperature T2 of the first N points in the second tube screen;

[0028] A4: If the temperature value of the characteristic high temperature point satisfies: min((T-T1),(T-T2))> preset threshold A, then the characteristic high temperature point is a characteristic abnormal high temperature point in the gap area;

[0029] Points within the gap region that are continuous with the characteristic abnormal high temperature point and whose temperature value is greater than max(T1,T2)+M are temperature noise points, where 0≤M≤preset threshold A;

[0030] Both the abnormal high temperature point and the temperature noise point refer to the abnormal high temperature point.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] This invention, by setting up a tube screen area division module and a gap temperature filtering module, can accurately divide each heat-absorbing tube screen and each gap area in the infrared image of the circumferential surface of the heat absorber, thereby accurately obtaining the temperature of each heat-absorbing tube screen and each gap area, and thus achieving precise measurement of the surface temperature of the heat absorber.

[0033] This invention improves the accuracy of surface temperature measurement of the absorber by setting up a gap temperature filtering module and filtering out abnormally high-temperature points in each gap area of ​​the absorber. This prevents abnormally high-temperature points in the gap area from affecting the concentrating solar collector system's judgment of the absorber's operating status, thereby further reducing the probability of false over-temperature judgment of the absorber.

[0034] This invention provides clear markings for determining the boundaries of the heat absorber tube screen by setting infrared generating tubes in various gap areas of the heat absorber, thereby effectively improving the accuracy and efficiency of heat absorber tube screen boundary identification.

[0035] This invention, by specially setting the shooting area of ​​each infrared camera, enables each area of ​​the circumferential surface of the heat absorber to be photographed at least twice by different infrared cameras. This allows for the comparison and cross-calibration of infrared images of the same area of ​​the heat absorber taken by different infrared cameras, thereby eliminating temperature measurement deviations caused by differences in temperature measurement between different infrared cameras. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the precise temperature measurement system for the absorber tube screen in an embodiment of the present invention;

[0037] Figure 2 This is a schematic diagram illustrating the steps of the precise temperature measurement method for the absorber tube screen in an embodiment of the present invention;

[0038] Figure 3 This is a flowchart of the tube screen area division and gap temperature filtering module in an embodiment of the present invention. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] Example 1

[0041] like Figure 1 As shown, the present invention provides a precise temperature measurement system for a heat absorber tube screen, comprising:

[0042] The heat absorber 1 includes a plurality of heat-absorbing tube screens 2 and protective plates 5 respectively disposed above and below the heat-absorbing tube screens 2. The gap between each heat-absorbing tube screen 2 is a gap region 3. The gap region 3 shown in the figure is between two adjacent heat-absorbing tube screens 2.

[0043] The infrared temperature monitoring system 9 is communicatively connected to the concentrating solar thermal control system. It is used to collect and detect infrared images of the circumferential surface of the absorber 1 and transmit the infrared images to the concentrating solar thermal control system to monitor the temperature of the absorber tube screen 2 and the gap area 3. In this embodiment, the infrared temperature monitoring system 9 consists of 4 or 8 infrared cameras 8, which collect the temperature of the absorber 1 in various directions and transmit the data to the concentrating solar thermal control system.

[0044] The concentrating solar thermal control system is used to receive the infrared image sent by the infrared temperature monitoring system 9, judge the temperature status of the absorber 1 based on the infrared image, and trigger a prompt when the temperature status of the absorber 1 is abnormal.

[0045] The concentrated solar power control system includes a tube screen area division module and a gap temperature filtering module. The tube screen area division module is used to identify and mark the boundaries of each heat-absorbing tube screen 2 based on the infrared image. The gap temperature filtering module is used to identify the gap region 3 based on the infrared image using an image recognition algorithm, and to filter and remove abnormally high-temperature points in the gap region 3. In this embodiment, the tube screen area division module and the gap temperature filtering module are embedded in the concentrated solar power control system.

[0046] This invention, by setting up a tube screen area division module and a gap temperature filtering module, can accurately divide each heat-absorbing tube screen 2 and each gap region 3 in the infrared image of the circumferential surface of the heat absorber 1, thereby accurately obtaining the temperature of each heat-absorbing tube screen 2 and each gap region 3, and thus achieving precise measurement of the surface temperature of the heat absorber 1. Further, each gap region 3 is provided with at least two infrared generating tubes 6, which are located on the center extension line of the gap region 3; the tube screen area division module divides the left and right boundaries of each heat-absorbing tube screen 2 by identifying the positions of the infrared generating tubes 6 in each gap region 2 in the infrared image; the tube screen area division module determines the upper and lower boundaries of each heat-absorbing tube screen 2 based on the obvious temperature change between the heat-absorbing tube screen 2 and the protective plate 5 in the infrared image using a boundary recognition algorithm.

[0047] Those skilled in the art will understand that the concentrating solar thermal control system includes a tube screen area division module. This module divides the left-right boundaries of the heat-absorbing tube screen 2 based on the temperature signal generated by the infrared generator tube 6, and divides the up-down boundaries of the heat-absorbing tube screen 2 using a boundary recognition algorithm. Its function is to automatically divide the boundaries of each heat-absorbing tube screen 2, reducing errors from manual calibration. In this embodiment, the infrared generator tube 6 is installed on the center extension line of the gap area 3 and is controlled by the concentrating solar thermal control system. Together with the tube screen area division module, it can automatically identify the boundaries of each heat-absorbing tube screen 2. The infrared generator tube 6 is installed vertically around the absorber 1, 3-5 meters away from the heat-absorbing tube screen 2. The infrared generator tube 6 is powered on, and its switching is controlled by the concentrating solar thermal control system. When the tube screen area division needs to be reset, the concentrating solar thermal control system issues a command, the infrared generator tube 6 turns on, and the software re-identifies and calibrates the boundaries of each heat-absorbing tube screen 2. The calibration method can also be set to periodic calibration or automatic calibration after the heat-absorbing tube screen 2 shifts. The tube screen area division module accurately divides the infrared images of the circumferential surface of the absorber 1 into individual absorber tube screens 2 and various slit regions 3. The acquired infrared images at this time contain the position information of the infrared generating tubes 6. Connecting the coordinates of the corresponding infrared generating tubes 6 above and below each slit region 3, the area containing this line is the slit region 3 between each absorber tube screen 2, thus defining the left and right boundaries of each slit region 3. During the operation of the absorber 2, there is a significant temperature difference between the upper and lower boundaries of the absorber tube screen 2 and the protective plate 5. At this time, the upper and lower boundaries of the absorber tube screen 2 can be determined using a boundary recognition algorithm. The recognition range of the upper and lower boundaries can be narrowed by 10cm inwards from the absorber tube screen 2 to eliminate the influence of the temperature of the upper and lower protective plates 5 on the temperature measurement of the absorber tube screen 2.

[0048] Furthermore, the infrared generating tube 6 operates in the mid-infrared band, and the infrared generating tube 6 has the same temperature measurement range as the infrared temperature monitoring system 9.

[0049] Those skilled in the art will understand that the band of the infrared generator tube 6 should be the mid-infrared band, which coincides with the temperature measurement band of the infrared camera 8. This is beneficial for the infrared camera 8 to capture the infrared radiation emitted by the infrared generator tube 6, thereby identifying the position of the infrared generator tube 6 and marking the gap area 3 based on the position of the infrared generator tube 6.

[0050] Furthermore, the gap temperature filtering module is used to identify the location of the infrared generating tube 6 in each gap region 3 in the infrared image through an image recognition algorithm, thereby determining each gap region 3, and identifying and eliminating abnormal high-temperature points in the gap region 3 through a temperature gradient algorithm. The concentrating solar thermal control system includes a gap temperature filtering module. The temperature data of the absorber 1 is processed by the gap temperature filtering module, which can filter and eliminate abnormal high-temperature points in each gap region 3 of the absorber 1, further improving the accuracy of the surface temperature measurement of the absorber 1, preventing abnormal high-temperature points in the gap region 3 from affecting the concentrating solar thermal system's judgment of the absorber 1's operating status, and further reducing the probability of false over-temperature judgment of the absorber 1.

[0051] The algorithm of the gap temperature filtering module in this embodiment is based on the temperature data processing of infrared images. (1) Identify each heat absorption tube screen 2 in the heat absorber 1 and the gap area 3 located between two adjacent heat absorption tube screens 2 by the infrared images collected by the infrared temperature monitoring system 9; (2) Identify abnormal high temperature points in the gap area 3 by the temperature gradient algorithm and filter them out.

[0052] The following algorithms can be used to identify abnormally high temperature points:

[0053] (1) Identify all characteristic high-temperature points T in the gap region 3 by using a temperature gradient algorithm, wherein the temperature of the characteristic high-temperature point is higher than the temperature of any point in the gap region 3 that is directly adjacent to the characteristic high-temperature point;

[0054] (2) Taking any one of the characteristic high temperature points as the center, a circular area is defined with a preset radius. The area where the circular area coincides with the gap area 3 is the characteristic area. All the characteristic high temperature points located in the characteristic area are arranged in order of temperature from high to low. The first N characteristic high temperature points are selected, and the average temperature T of the selected first N characteristic high temperature points is calculated.

[0055] (3) The two heat-absorbing tube screens 2 adjacent to the gap region 3 are the first heat-absorbing tube screen and the second heat-absorbing tube screen, respectively; the points in the first heat-absorbing tube screen are arranged in order of temperature from high to low, and the average temperature T1 of the first N points in the first tube screen is calculated; the points in the second heat-absorbing tube screen are arranged in order of temperature from high to low, and the average temperature T2 of the first N points in the second tube screen is calculated.

[0056] (4) If the temperature value of the characteristic high temperature point satisfies: min((T-T1),(T-T2))> preset threshold A, such as the preset threshold A being set to 20℃, then the characteristic high temperature point is the characteristic abnormal high temperature point of the gap region 3; the point in the gap region 3 that is continuous with the characteristic abnormal high temperature point and has a temperature value greater than max(T1,T2)+10 is a temperature noise point, where 0≤M≤preset threshold A; both the characteristic abnormal high temperature point and the temperature noise point are abnormal high temperature points, and removing the above abnormal high temperature points prevents misjudgment of overheating of the absorber 1.

[0057] Due to processing and assembly issues, gaps exist between the various heat-absorbing tube panels 2 of the heat absorber 1. Solar radiation passes through these gaps and shines onto the internal protective plate 5, creating localized high-temperature areas that can damage the protective plate 5. By filling the gap areas 3 with high-temperature resistant protective material, the protective plate 5 within the gap areas 3 is protected, while simultaneously reducing the temperature of the gap areas 3. The high-temperature resistant protective material can be a material that can solidify and has high-temperature resistance, such as composite calcium silicate powder.

[0058] In one embodiment, the gap region 3 is provided with a high-temperature resistant protective layer 4, which includes a metal mesh skeleton and a solidifiable high-temperature resistant protective material filled in the metal mesh skeleton. The high-temperature resistant protective material is a high-temperature resistant material with high reflectivity, such as calcium silicate or high-temperature ceramics, and its function is to protect the gap region 3 from high-temperature damage, allowing the mirror field to project more energy.

[0059] In another embodiment, the gap region 3 is provided with a high-temperature resistant protective layer 4, which includes a molded filling material arranged in a tile-like shape within the gap region 3. The molded filling material can be directly fixed to the gap region 3 with screws. For example, the high-temperature resistant protective layer 4 is a high-temperature ceramic plate. Specifically, the high-temperature ceramic plate has elongated screw holes to prevent thermal stress from damaging the high-temperature ceramic plate or displacing the fixing screws under high-temperature conditions. The high-temperature ceramic plates are arranged in a tile-like shape within the gap region 3, with the tail of the upper high-temperature ceramic plate covering the head of the lower high-temperature ceramic plate, with an overlap of about two centimeters. The cross-section of the high-temperature ceramic plate can adopt various shapes such as rectangular or herringbone. The advantage of a rectangular cross-section is its simple structure and convenient installation, while the advantage of a herringbone structure is that it can reflect most of the light in the gap region 3 to the heat absorption pipe 1.

[0060] Furthermore, the infrared temperature monitoring system 9 includes several infrared cameras 8, which are used to collect infrared images of the circumferential surface of the absorber 1 and transmit the infrared images to the concentrating heat collection control system.

[0061] Furthermore, there are two ways to arrange the infrared cameras 8 around the heat absorber 1. The first arrangement is as follows: the circumferential surface of the heat absorber 1 is divided into several continuous independent test areas, and each independent test area is non-overlapping. At least two infrared cameras 8 are arranged for each independent test area. The second arrangement is as follows: the circumferential surface of the heat absorber 1 is divided into several test areas, with any two adjacent test areas partially overlapping. Any one of the test areas is used as a feature test area, and the merged test area formed by two test areas adjacent to the feature test area can completely cover the feature test area. At least one infrared camera 8 is arranged for each test area.

[0062] When the first setting method is adopted, the circumferential surface of the heat absorber 1 is divided into 4 independent test areas that are continuous from beginning to end and do not overlap. Each independent test area is captured by two infrared cameras 8. By comparing the infrared images of the same independent test area captured by the two infrared cameras 8, the temperature measurement deviation caused by the temperature measurement difference of different infrared cameras 8 is eliminated.

[0063] When the second setup is adopted, the circumferential surface of the heat absorber 1 is divided into 8 test areas along its circumferential direction. Each test area is captured by an infrared camera 8. Since each test area can be completely covered by the two adjacent test areas, the infrared images captured by the infrared cameras 8 corresponding to the two adjacent test areas can be stitched together to obtain the infrared image of each test area. At the same time, since the infrared image of each test area can also be obtained by its own corresponding infrared camera 8, in effect, each test area can obtain two infrared images. By comparing and calibrating these two infrared images, the temperature measurement deviation caused by the temperature measurement difference of different infrared cameras 8 can be eliminated.

[0064] Example 2

[0065] like Figure 2 As shown, based on the same concept, the present invention also provides a method for accurate temperature measurement of a heat absorber tube screen, comprising:

[0066] S1: Acquire infrared images of the heat absorber from different positions;

[0067] S2: Identify each heat-absorbing tube screen in the heat absorber and the gap area between two adjacent heat-absorbing tube screens based on the infrared image, identify abnormal high-temperature points in the gap area through the temperature gradient algorithm, and filter and remove the abnormal high-temperature points.

[0068] S3: The temperature status of the absorber is judged based on the temperature data of the absorber after filtering and removing the abnormal high temperature points, and a prompt is triggered when the temperature status of the absorber is abnormal, which helps to prevent misjudgment of the absorber overheating.

[0069] Furthermore, the method for identifying abnormal high-temperature points in step S2 includes:

[0070] A1: Identify all characteristic high-temperature points within the gap area using a temperature gradient algorithm, wherein the temperature of each characteristic high-temperature point is higher than the temperature of any point directly adjacent to the characteristic high-temperature point within the gap area;

[0071] A2: Taking any one of the characteristic high-temperature points as the center, a circular area is defined with a preset radius. The area where the circular area and the gap area overlap is the characteristic area. All the characteristic high-temperature points located in the characteristic area are arranged in order of temperature from high to low. The first N characteristic high-temperature points are selected, and the average temperature T of the selected first N characteristic high-temperature points is calculated.

[0072] A3: The two heat-absorbing tube screens adjacent to the gap area are the first heat-absorbing tube screen and the second heat-absorbing tube screen, respectively;

[0073] Arrange the points in the first heat-absorbing tube screen in order of temperature from high to low, and calculate the average temperature T1 of the first N points in the first tube screen;

[0074] Arrange the points in the second heat absorption tube screen in order of temperature from high to low, and calculate the average temperature T2 of the first N points in the second tube screen;

[0075] A4: If the temperature value of the characteristic high temperature point satisfies: min((T-T1),(T-T2))> preset threshold A, then the characteristic high temperature point is a characteristic abnormal high temperature point in the gap area;

[0076] Points within the gap region that are continuous with the characteristic abnormal high temperature point and whose temperature value is greater than max(T1,T2)+M are temperature noise points, where 0≤M≤preset threshold A;

[0077] Both the abnormal high temperature point and the temperature noise point refer to the abnormal high temperature point.

[0078] Those skilled in the art will understand that, Figure 3As shown, this invention further optimizes the concentrating solar collector system and control algorithm through a precise temperature measurement method for the receiver tube screen, improving the accuracy of temperature monitoring of the receiver tube screen and enhancing the efficiency and safety of receiver operation. By employing an abnormal high-temperature point identification method, abnormal high-temperature points in various gap regions within the receiver are filtered and eliminated, further improving the accuracy of receiver surface temperature measurement. This prevents abnormal high-temperature points in the gap regions from affecting the concentrating solar collector system's judgment of the receiver's operating status, thereby further reducing the probability of false over-temperature judgments.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A precise temperature measurement system for a heat absorber tube panel, characterized by, The system comprises: a heat absorber comprising a plurality of heat absorption tube panels and a protective plate arranged above and below the heat absorption tube panels respectively, and a gap between each of the heat absorption tube panels is a joint area; an infrared temperature monitoring system in communication with the concentrated light heat collection control system, configured to collect an infrared image of the circumferential surface of the heat absorber, and transmit the infrared image to the concentrated light heat collection control system to monitor the temperature of the heat absorption tube panels and the joint area; a concentrated light heat collection control system configured to receive the infrared image sent by the infrared temperature monitoring system, and determine the temperature state of the heat absorber according to the infrared image, and trigger a prompt when the temperature state of the heat absorber is abnormal; wherein the concentrated light heat collection control system comprises a tube panel area division module and a joint temperature filtering module; the tube panel area division module is configured to identify and demarcate the boundaries of each of the heat absorption tube panels according to the infrared image; and the joint temperature filtering module is configured to identify the joint area by an image recognition algorithm according to the infrared image, and filter and remove abnormal high-temperature points in the joint area.

2. The accurate temperature measurement system for a receiver tube panel as claimed in claim 1, wherein At least two infrared generating tubes are arranged in each of the joint areas, and the infrared generating tubes are arranged on the central extension line of the joint area; the tube panel area division module divides the left and right boundaries of each of the heat absorption tube panels by identifying the positions of the infrared generating tubes in each of the joint areas in the infrared image; and the tube panel area division module determines the upper and lower boundaries of each of the heat absorption tube panels by a boundary recognition algorithm according to the obvious temperature change between the heat absorption tube panels and the protective plate in the infrared image.

3. The accurate temperature measurement system for a receiver tube panel as claimed in claim 2, wherein The working waveband of the infrared generating tube is a mid-infrared waveband, and the temperature measurement range of the infrared generating tube is the same as that of the infrared temperature monitoring system.

4. The accurate temperature measurement system for a receiver tube panel as recited in claim 2, wherein The joint temperature filtering module is configured to identify the positions of the infrared generating tubes in each of the joint areas in the infrared image by an image recognition algorithm, to determine each of the joint areas, and to identify and remove abnormal high-temperature points in the joint area by a temperature gradient algorithm.

5. The accurate temperature measurement system for a receiver tube panel as recited in claim 1, wherein The joint area is provided with a high-temperature resistant protective layer, and the high-temperature resistant protective layer comprises a metal mesh framework and a high-temperature resistant protective material filled in the metal mesh framework.

6. The accurate temperature measurement system for a receiver tube panel as recited in claim 1, wherein The joint area is provided with a high-temperature resistant protective layer, and the high-temperature resistant protective layer comprises a shaped filling material arranged in the joint area in a tile shape.

7. The accurate temperature measurement system for a receiver tube panel as recited in claim 1, wherein The infrared temperature monitoring system comprises a plurality of infrared cameras configured to collect an infrared image of the circumferential surface of the heat absorber, and transmit the infrared image to the concentrated light heat collection control system.

8. The heat absorber tube panel accurate temperature measurement system of claim 7, wherein the circumferential surface of the heat absorber is divided into a plurality of continuous independent to-be-measured areas along the circumference thereof, and each of the independent to-be-measured areas does not overlap with each other, and at least two infrared cameras are arranged in each of the independent to-be-measured areas; or The heat absorber circumferential surface is divided into a plurality of to-be-measured areas along its circumference, any two adjacent to-be-measured areas partially overlap, and, taking any one to-be-measured area as a characteristic to-be-measured area, two to-be-measured areas adjacent to the characteristic to-be-measured area form a combined to-be-measured area capable of completely covering the characteristic to-be-measured area, and at least one infrared camera is arranged for each to-be-measured area.

9. A method of accurately measuring the temperature of a heat sink tube panel, the method comprising: It comprises: S1: collecting infrared images of the heat absorber in different directions; S2: identifying each heat absorption tube panel in the heat absorber and the gap area between adjacent two heat absorption tube panels according to the infrared images, identifying an abnormally high temperature point in the gap area through a temperature gradient algorithm, and filtering and removing the abnormally high temperature point; S3: judging the temperature state of the heat absorber according to the temperature data of the heat absorber after filtering and removing the abnormally high temperature point, and triggering a prompt when the temperature state of the heat absorber is abnormal.

10. The method for accurate temperature measurement of the absorber tube screen as described in claim 9, characterized in that, The identification method of the abnormally high temperature point comprises: A1: identifying all feature high temperature points in the gap area through a temperature gradient algorithm, wherein the temperature of the feature high temperature point is higher than the temperature of any point directly adjacent to the feature high temperature point in the gap area; A2: taking any one of the feature high temperature points as the center, drawing a circular area with a preset radius, taking the area where the circular area overlaps with the gap area as a characteristic area, arranging all feature high temperature points in the characteristic area in descending order of temperature, selecting the first N feature high temperature points, and calculating the average temperature T of the selected first N feature high temperature points; A3: the two heat absorption tube panels adjacent to the gap area are respectively a first heat absorption tube panel and a second heat absorption tube panel; arranging the points in the first heat absorption tube panel in descending order of temperature, calculating the average temperature T1 of the first N points in the first heat absorption tube panel; arranging the points in the second heat absorption tube panel in descending order of temperature, calculating the average temperature T2 of the first N points in the second heat absorption tube panel; A4: if the temperature value of the feature high temperature point satisfies min((T-T1), (T-T2))> preset threshold A, the feature high temperature point is a feature abnormally high temperature point in the gap area; the points in the gap area that are continuous with the feature abnormally high temperature point and have a temperature value greater than max(T1, T2)+M are temperature noise points, wherein 0≤M≤preset threshold A; the feature abnormally high temperature point and the temperature noise point are both the abnormally high temperature point.

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