Coating Thickness Measurement System and Method Based on Infrared Non-Destructive Testing Technology

Abstract

An embodiment of the present invention discloses a coating thickness measurement system and method based on infrared non-destructive testing technology. Both the thermal excitation source and the thermal imager of the system are electrically connected to the upper computer. The system further includes a standard coating specimen and a driving mechanism electrically connected to the upper computer. The thermal excitation source, the thermal imager, and the standard coating specimen are all installed on the driving mechanism. Among them, the driving mechanism is used to drive the thermal excitation source, the thermal imager, and the standard coating specimen to move synchronously to face one of the detection positions on the surface of the workpiece to be detected. The thermal excitation source is used to modulate a periodic thermal excitation to heat the surface of the detection position of the workpiece to be detected and the surface of the standard coating specimen periodically. The thermal imager is used to simultaneously collect the thermal wave signals on the surface of the detection position and the thermal wave signals on the surface of the standard coating specimen. The upper computer is used to analyze and process the thermal wave signals on the surface of the detection position and the thermal wave signals on the surface of the standard coating specimen, and calculate the coating thickness of the detection position.

Description

Technical Field

[0001] The present invention relates to the technical field of computer software, and particularly to a coating thickness measurement system and method based on infrared non-destructive testing technology. Background Art

[0002] The most commonly used materials for metal components are steel, copper, aluminum and their alloys. However, during actual service, affected by climatic factors such as temperature and humidity and environmental pollution, the problem of weather resistance has become increasingly prominent, reducing their service life and often causing irreparable economic losses. Applying weather-resistant coating protection to metal components is one of the most effective, direct, common and economical methods. Coating technology has been widely used in fields such as aerospace, shipbuilding, nuclear industry, petrochemical industry, etc. to ensure that equipment and key components can work in harsh environments.

[0003] The coating structure has advantages such as beauty, heat insulation and corrosion resistance. However, during the coating preparation and service process, defects such as bubbles and cracks will inevitably occur, and the coating thickness and uniformity will directly affect the coating life. Therefore, the detection of coating thickness is very important.

[0004] In the prior art, a Chinese invention patent with the publication number of CN113295124A discloses a coating thickness detection method and a coating thickness detection device. The coating thickness detection method includes setting the standard thickness, detection area and extension length of the coating in a setting module. The infrared thermal imaging projection module is facing the detection area, and multiple detection points are selected in the detection area. The coating thickness of each detection point is detected by a detection module, and the coating thickness is transmitted to an identification module. The identification module compares the coating thickness with the standard thickness. If the coating thickness is less than the standard thickness, an extended area is divided. Repeat the above steps in the extended area until all unqualified points are detected. The identification module calculates the average thickness of the unqualified points in the unqualified area, and the infrared thermal imaging projection module projects the boundary of the unqualified area and the corresponding average thickness on the surface of the coating. Real-time monitoring and visual detection of the coating thickness are realized, the inspection workload is reduced, and the inspection efficiency is improved.

[0005] The coating thickness detection method disclosed in this patent measures the coating thickness based on thermal wave imaging technology. However, thermal wave imaging technology is an indirect measurement method, and the result is obtained by comprehensive measurement and calculation of multiple physical parameters. Therefore, it is easily affected by various external factors and causes system drift, such as changes in environmental conditions, changes in operation methods, and changes in the surface shape or curvature of the workpiece to be detected, etc. These will all affect the detection accuracy and require compensation and correction. In addition, when detecting the coating by thermal wave imaging, the relationship between the detected signal and the coating thickness is complex and cannot be calculated by a simple formula, which brings difficulties to the accurate measurement of the coating thickness. Summary of the Invention

[0006] In view of the technical deficiencies in the prior art, the purpose of the embodiments of the present invention is to provide a coating thickness measurement system and method based on infrared non-destructive testing technology to solve the technical problems proposed in the background art.

[0007] To achieve the above object, in a first aspect, the embodiments of the present invention provide a coating thickness measurement system based on infrared non-destructive testing technology, including a thermal excitation source, a thermal imager and a host computer. Both the thermal excitation source and the thermal imager are electrically connected to the host computer, and further include a standard coating specimen and a driving mechanism electrically connected to the host computer;

[0008] The thermal excitation source, the thermal imager and the standard coating specimen are all installed on the driving mechanism; wherein,

[0009] The driving mechanism is used to drive the thermal excitation source, the thermal imager and the standard coating specimen to move synchronously to face one of the detection positions on the surface of the workpiece to be detected;

[0010] The thermal excitation source is used to modulate a periodic thermal excitation to heat the surface of the detection position of the workpiece to be detected and the surface of the standard coating specimen periodically;

[0011] The thermal imager is used to simultaneously collect the thermal wave signals on the surface of the detection position and the thermal wave signals on the surface of the standard coating specimen;

[0012] The host computer is used to analyze and process the thermal wave signals on the surface of the detection position and the thermal wave signals on the surface of the standard coating specimen, and calculate the coating thickness of the detection position.

[0013] Furthermore, the host computer is further used for:

[0014] Construct a three-dimensional reconstruction model of the surface of the workpiece to be detected;

[0015] Divide the surface of the workpiece to be detected into multiple non-overlapping detection regions according to preset requirements in the three-dimensional reconstruction model, and select several detection points in the detection regions to confirm the detection point coordinates;

[0016] According to the detection point coordinates, control the driving mechanism to drive the thermal excitation source, the thermal imager and the standard coating specimen to move synchronously to the corresponding detection positions.

[0017] Furthermore, the host computer is further used for:

[0018] If the error between the coating thickness at the detection position and the preset standard thickness value is greater than the set threshold, mark the detection position and the corresponding coating thickness on the three-dimensional reconstruction model.

[0019] Further, constructing a three-dimensional reconstruction model of the surface of the workpiece to be detected includes:

[0020] Receiving a depth image of the surface of the workpiece to be detected captured by an image collector;

[0021] Obtaining three-dimensional coordinate data of the surface of the workpiece to be detected according to the internal and external parameters of the image collector and the depth image;

[0022] Constructing the three-dimensional reconstruction model according to the three-dimensional coordinate data.

[0023] Further, the driving mechanism includes a support frame, a first driving component installed on the support frame, and a second driving component installed on the first driving component. Both the first driving component and the second driving component are electrically connected to the upper computer by signals;

[0024] Both the thermal excitation source and the thermal imager are installed on the first driving component;

[0025] The standard coating specimen is installed on the second driving component. The second driving component drives the standard coating specimen to move up and down and adjust the inclination angle so that the distance between the standard coating specimen and the surfaces at different detection positions is the same.

[0026] Further, the first driving component includes a transverse movement module and a longitudinal movement module arranged in the same plane. The longitudinal movement module is installed on the transverse movement module. The thermal excitation source, the thermal imager, and the second driving component are all installed on the longitudinal movement module.

[0027] Further, both the transverse movement module and the longitudinal movement module are linear servo slides.

[0028] Further, the second driving component includes a servo electric cylinder and a steering gear. The servo electric cylinder is vertically arranged, and its top end is fixedly installed on the first driving component;

[0029] The standard coating specimen is installed on the bottom end of the servo electric cylinder through the steering gear. The steering gear is fixedly installed on the bottom end of the servo electric cylinder, and the steering gear is perpendicular to the servo electric cylinder.

[0030] Further, the standard coating specimen includes multiple reference sheets with gradually increasing coating thicknesses and a carrier plate. The multiple reference sheets are evenly distributed on the upper plate surface of the carrier plate, and the carrier plate is connected to the second driving component.

[0031] In a second aspect, an embodiment of the present invention further provides a coating thickness measurement method based on infrared non-destructive testing technology, which is applicable to the coating thickness measurement system as described in the first aspect. The method includes:

[0032] The driving mechanism drives the thermal excitation source, the thermal imager, and the standard coating specimen to move synchronously to face one of the detection positions on the surface of the workpiece to be detected;

[0033] The thermal excitation source modulates a periodic thermal excitation to perform periodic heating on the surface of the detection position of the workpiece to be detected and the surface of the standard coating specimen;

[0034] The thermal imager simultaneously collects the thermal wave signals on the surface of the detection position and the thermal wave signals on the surface of the standard coating specimen;

[0035] The host computer analyzes and processes the thermal wave signals on the surface of the detection position and the thermal wave signals on the surface of the standard coating specimen, and calculates the coating thickness at the detection position.

[0036] For the coating thickness measurement system and method of the present application, after the driving mechanism drives the thermal excitation source, the thermal imager, and the standard coating specimen to move synchronously to face one of the detection positions on the surface of the workpiece to be detected, a periodic thermal excitation is modulated by the thermal excitation source to perform periodic heating on the surface of the detection position of the workpiece to be detected and the surface of the standard coating specimen. The thermal imager simultaneously collects the thermal wave signals on the surface of the detection position and the thermal wave signals on the surface of the standard coating specimen, and sends the collected thermal wave signals to the host computer. The host computer analyzes and processes the thermal wave signals on the surface of the detection position and the thermal wave signals on the surface of the standard coating specimen, and calculates the coating thickness at the detection position.

[0037] The host computer first fits a fitting curve of the coating thickness and the phase value of the thermal wave signal through the thermal wave signal on the surface of the standard coating specimen, and uses the fitting curve to measure the coating thickness on the surface of the workpiece to be detected, with fast and accurate measurement.

[0038] Moreover, the coating thickness measurement system of the present application does not need to obtain all the thermal wave signals on the entire surface of the workpiece to be detected, only needs to collect the thermal wave signals on the surface of the detection position, and the amount of data that the host computer needs to process is small, and the processing speed is faster.

[0039] Finally, the coating thickness measurement system of the present application has a high degree of automation, and greatly improves the coating thickness measurement speed based on the infrared non-destructive testing technology. Description of the Drawings

[0040] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art.

[0041] Figure 1 It is a schematic structural diagram of a coating thickness measurement system based on infrared non-destructive testing technology provided by an embodiment of the present invention;

[0042] Figure 2It is a schematic structural diagram of a standard coating specimen provided by an embodiment of the present invention;

[0043] Figure 3 It is a fitting curve between the phase difference and the coating thickness provided by an embodiment of the present invention;

[0044] Figure 4 It is a flowchart of a coating thickness measurement method based on infrared non-destructive testing technology provided by an embodiment of the present invention. Detailed implementation manners

[0045] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0046] It should be understood that when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their combinations.

[0047] It should also be understood that the terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in this specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms.

[0048] It should be further understood that the term " / and / " used in this specification of the present invention and the appended claims refers to any combination and all possible combinations of one or more of the related listed items, and includes these combinations.

[0049] As used in this specification and the appended claims, the term "if" can be interpreted as "when...", "once", "in response to determining" or "in response to detecting" according to the context. Similarly, the phrase "if determined" or "if [the described condition or event] is detected" can be interpreted as meaning "once determined", "in response to determining", "once [the described condition or event] is detected" or "in response to detecting [the described condition or event]" according to the context.

[0050] It should be noted that unless otherwise specified, the technical terms or scientific terms used in this application should be of the ordinary meaning understood by those skilled in the art to which the present invention belongs.

[0051] Embodiment 1:

[0052] As Figure 1 shown, a coating thickness measurement system based on infrared non-destructive testing technology provided by an embodiment of the present invention includes a thermal excitation source 1, a thermal imager 2, a host computer 3, a standard coating specimen 4, and a driving mechanism 5. The thermal excitation source 1, the thermal imager 2, and the driving mechanism 5 are all electrically connected to the host computer 3, and the thermal excitation source 1, the thermal imager 2, and the standard coating specimen 4 are all installed on the driving mechanism 5.

[0053] Specifically, the driving mechanism 5 is used to drive the thermal excitation source 1, the thermal imager 2, and the standard coating specimen 4 to move synchronously to face one of the detection positions on the surface of the workpiece to be detected 6. The thermal excitation source 1 is used to modulate a periodic thermal excitation to heat the surface of the detection position of the workpiece to be detected 6 and the surface of the standard coating specimen 4 periodically. The thermal imager 2 is used to simultaneously collect the thermal wave signals on the surface of the detection position and the thermal wave signals on the surface of the standard coating specimen 4. The host computer 3 is used to analyze and process the thermal wave signals on the surface of the detection position and the thermal wave signals on the surface of the standard coating specimen 4, and calculate the coating thickness of the detection position.

[0054] Specifically, in this embodiment, the thermal excitation source 1, the thermal imager 2, and the host computer 3 can all adopt the relevant hardware devices in the existing infrared non-destructive testing system. The phase of the excitation current of the thermal excitation source 1 is known. The host computer 3 extracts the phase of the thermal wave signal, calculates the phase difference between the phase of the thermal wave signal and the phase of the excitation current of the thermal excitation source 1, and determines the coating thickness according to the phase difference.

[0055] During the detection process of infrared thermal wave imaging, the temperature on the surface of the workpiece to be detected is determined by the thermal excitation energy, surface light energy absorption rate, material heat capacity, density, thermal diffusion coefficient, and environmental temperature, etc. The surface temperature is in a proportional relationship with the thermal excitation energy and is also a linear relationship with the system drift. Therefore, by simultaneously detecting the standard coating specimen and the workpiece to be detected, the data can be normalized to eliminate the influence caused by the thermal excitation energy and the system drift.

[0056] In this embodiment, the host computer 3 is further used for:

[0057] Constructing a three-dimensional reconstruction model of the surface of the workpiece to be detected 6;

[0058] Dividing the surface of the workpiece to be detected 6 into a plurality of non-overlapping detection regions according to preset requirements in the three-dimensional reconstruction model, and selecting a number of detection points in the detection regions to confirm the detection point coordinates;

[0059] Controlling the driving mechanism 5 to drive the thermal excitation source 1, the thermal imager 2, and the standard coating specimen 4 to move synchronously to the corresponding detection positions according to the detection point coordinates.

[0060] Specifically, a three-dimensional reconstruction model of the surface of the workpiece 6 to be detected is constructed, including: receiving a depth image of the surface of the workpiece 6 captured by the image collector 7; obtaining three-dimensional coordinate data of the surface of the workpiece 6 based on the internal and external parameters of the image collector 7 and the depth image; and constructing a three-dimensional reconstruction model based on the three-dimensional coordinate data.

[0061] It can be understood that the workpiece 6 to be detected needs to be placed on the support table 16. Specifically, the image collector 7 can be a depth camera, and the depth camera is installed above the support table through a bracket for capturing the depth image of the workpiece 6.

[0062] The host computer 3 first converts the depth image into point cloud data, converting the depth value of each pixel in the depth image into the coordinate value of each point in the point cloud data; then, through the internal and external parameters of the camera and the point cloud data, the point cloud data is converted from the camera coordinate system to the world coordinate system using the projection matrix of the camera, and the coordinate value of each point in the world coordinate system is calculated; finally, a three-dimensional reconstruction model is constructed based on the three-dimensional coordinate data.

[0063] The host computer 3 can visually display the three-dimensional reconstruction model of the surface of the workpiece 6 to be detected, and divide the surface of the workpiece 6 into several non-overlapping detection areas according to the inspection parameters set by the inspector, such as the detection area, the detection density in each detection area, etc. All the detection areas form the surface of the workpiece 6, and detection points are selected within the detection areas, so as to determine the coordinates of the detection points and the tangent inclination angle of the surface of the detection points.

[0064] In this application, the host computer 3 is also used to mark the detection position and the corresponding coating thickness on the three-dimensional reconstruction model if the error between the coating thickness at the detection position and the preset standard thickness value is greater than the set threshold.

[0065] Specifically, if the coating thickness at a certain detection point is less than or greater than the set standard error range, the host computer 3 will mark the detection position and the corresponding coating thickness on the three-dimensional reconstruction model, facilitating the inspector to promptly confirm the position where the coating is unqualified.

[0066] In this embodiment, the driving mechanism 5 includes a support frame 8, a first driving component installed on the support frame 8, and a second driving component 11 installed on the first driving component. Both the first driving component and the second driving component 11 are electrically connected to the host computer 3. The thermal excitation source 1 and the thermal imager 2 are both installed on the first driving component.

[0067] The standard coating specimen 4 is installed on the second driving component 11, and the second driving component 11 drives the standard coating specimen 4 to move up and down and adjust the inclination angle so that the distance between the standard coating specimen 4 and the surfaces of different detection positions is the same.

[0068] Specifically, the first driving component includes a lateral movement module 9 and a longitudinal movement module 10 arranged in the same plane. The longitudinal movement module 10 is installed on the lateral movement module 9, and the thermal excitation source 1, the thermal imager 2, and the second driving component 11 are all installed on the longitudinal movement module 10. Among them, both the lateral movement module 9 and the longitudinal movement module 10 are linear servo slides.

[0069] The second driving component 11 includes a servo electric cylinder 14 and a servo motor 15. The servo electric cylinder 14 is vertically arranged, and its top end is fixedly installed on the longitudinal movement module 10 of the first driving component. The standard coating specimen 4 is installed on the bottom end of the servo electric cylinder 14 through the servo motor 15. The servo motor 15 is fixedly installed on the bottom end of the servo electric cylinder 14, and the servo motor 15 is perpendicular to the servo electric cylinder 14. The servo electric cylinder 14 drives the standard coating specimen 4 to move up and down, and the servo motor 15 drives the standard coating specimen 4 to rotate, so as to adjust the inclination angle of the standard coating specimen 4, so that the inclination angle of the standard coating specimen 4 is the same as the tangent inclination angle of the surface of the detection point, so that the coating thickness on the curved surface can also be accurately measured.

[0070] In this embodiment, as Figure 2 shown, the standard coating specimen 4 includes a plurality of reference plates 12 with gradually increasing coating thicknesses and a carrier plate 13. The plurality of reference plates 12 are evenly distributed on the upper plate surface of the carrier plate 13, and the carrier plate 13 is connected to the second driving component 11. The host computer 3 fits a fitting curve of the coating thickness and the phase value of the thermal wave signal through the thermal wave signals on the surfaces of the reference plates 12 with gradually increasing coating thicknesses, as Figure 3 shown. To ensure accurate measurement of the coating thickness at each detection position, a new fitting curve of the coating thickness and the phase value of the thermal wave signal can be fitted according to the thermal wave signals on the surfaces of the reference plates 12 each time of measurement, and calibration is performed based on the new fitting curve, so as to obtain accurate coating thickness data.

[0071] Embodiment 2:

[0072] Second, the embodiment of the present invention also provides a coating thickness measurement method based on infrared non-destructive testing technology, which is applicable to the coating thickness measurement system provided in Embodiment 1. As Figure 4 shown, this method includes:

[0073] Step S110: The driving mechanism 5 drives the thermal excitation source 1, the thermal imager 2, and the standard coating specimen 4 to move synchronously to face one of the detection positions on the surface of the workpiece to be detected 6;

[0074] Step S120: The thermal excitation source 1 modulates a periodic thermal excitation to perform periodic heating on the surface of the detection position of the workpiece to be detected 6 and the surface of the standard coating specimen 4;

[0075] Step S130: The thermal imager 2 simultaneously collects the thermal wave signals on the surface of the detection position and the thermal wave signals on the surface of the standard coating specimen 4;

[0076] Step S140: The host computer 3 analyzes and processes the thermal wave signals on the surface of the detection position and the thermal wave signals on the surface of the standard coating specimen 4, and calculates the coating thickness at the detection position.

[0077] As mentioned above, the above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A coating thickness measurement system based on infrared non-destructive testing technology, comprising a thermal excitation source (1), a thermal imager (2) and a host computer (3), wherein the thermal excitation source (1) and the thermal imager (2) are both electrically connected to the host computer (3). Characterized in that, It further includes a standard coating specimen (4) and a driving mechanism (5) electrically connected to the host computer (3); The thermal excitation source (1), the thermal imager (2) and the standard coating specimen (4) are all installed on the driving mechanism (5); among them, The driving mechanism (5) is used to drive the thermal excitation source (1), the thermal imager (2) and the standard coating specimen (4) to move synchronously to face one of the detection positions on the surface of the workpiece to be detected (6); The thermal excitation source (1) is used to modulate a periodic thermal excitation to heat the surface of the detection position of the workpiece to be detected (6) and the surface of the standard coating specimen (4) periodically; The thermal imager (2) is used to simultaneously collect the thermal wave signals on the surface of the detection position and the thermal wave signals on the surface of the standard coating specimen (4); The host computer (3) is used to analyze and process the thermal wave signals on the surface of the detection position and the thermal wave signals on the surface of the standard coating specimen (4), and calculate the coating thickness of the detection position; Specifically, the phase of the excitation current of the thermal excitation source (1) is known. The host computer (3) calculates the phase difference between the phase of the thermal wave signal and the phase of the excitation current of the thermal excitation source (1) by extracting the phase of the thermal wave signal, and determines the coating thickness according to the phase difference; the host computer (3) first fits a fitting curve of the coating thickness and the phase value of the thermal wave signal through the thermal wave signal on the surface of the standard coating specimen (4), and then uses the fitting curve to measure the coating thickness on the surface of the workpiece to be detected (6); The host computer (3) is further used for: Constructing a three-dimensional reconstruction model of the surface of the workpiece to be detected (6); Dividing the surface of the workpiece to be detected (6) into a plurality of non-overlapping detection regions according to preset requirements in the three-dimensional reconstruction model, and selecting several detection points in the detection regions, and confirming the detection point coordinates and the tangent inclination angles of the detection point surfaces; Controlling the driving mechanism (5) to drive the thermal excitation source (1), the thermal imager (2) and the standard coating specimen (4) to move synchronously to the corresponding detection positions according to the detection point coordinates, and correspondingly adjusting the inclination angle of the standard coating specimen (4) according to the tangent inclination angle of the detection point surface, so that the distance between the standard coating specimen (4) and the surfaces of different detection positions is the same.

2. A coating thickness measurement system based on infrared non-destructive testing technology according to claim 1, Characterized in that, The host computer (3) is further used for: If the error between the coating thickness at the detection position and the preset standard thickness value is greater than the set threshold, marking the detection position and the corresponding coating thickness on the three-dimensional reconstruction model.

3. A coating thickness measurement system based on infrared non-destructive testing technology according to claim 1, Characterized in that, Constructing the three-dimensional reconstruction model of the surface of the workpiece to be detected (6) includes: Receiving the depth image of the surface of the workpiece to be detected (6) taken by the image collector (7); Obtain the three-dimensional coordinate data of the surface of the workpiece to be detected (6) based on the internal and external parameters of the image collector (7) and the depth image; Construct the three-dimensional reconstruction model according to the three-dimensional coordinate data.

4. A coating thickness measurement system based on infrared non-destructive testing technology as described in claim 1, characterized in that the driving mechanism (5) includes a support frame (8), a first driving component installed on the support frame (8), and a second driving component (11) installed on the first driving component. Both the first driving component and the second driving component (11) are electrically connected to the host computer (3); the thermal excitation source (1) and the thermal imager (2) are both installed on the first driving component; the standard coating specimen (4) is installed on the second driving component (11), and the second driving component (11) drives the standard coating specimen (4) to move up and down and adjust the inclination angle so that the distance between the standard coating specimen (4) and the surfaces of different detection positions is the same.

5. A coating thickness measurement system based on infrared non-destructive testing technology as described in claim 4, characterized in that the first driving component includes a lateral movement module (9) and a longitudinal movement module (10) arranged in the same plane. The longitudinal movement module (10) is installed on the lateral movement module (9), and the thermal excitation source (1), the thermal imager (2), and the second driving component (11) are all installed on the longitudinal movement module (10).

6. A coating thickness measurement system based on infrared non-destructive testing technology as described in claim 5, characterized in that both the lateral movement module (9) and the longitudinal movement module (10) are linear servo slides.

7. A coating thickness measurement system based on infrared non-destructive testing technology as described in claim 4, characterized in that the second driving component (11) includes a servo electric cylinder (14) and a servo motor (15). The servo electric cylinder (14) is vertically arranged, and its top end is fixedly installed on the first driving component; the standard coating specimen (4) is installed on the bottom end of the servo electric cylinder (14) through the servo motor (15). The servo motor (15) is fixedly installed on the bottom end of the servo electric cylinder (14), and the servo motor (15) is perpendicular to the servo electric cylinder (14).

8. A coating thickness measurement system based on infrared non-destructive testing technology as described in claim 4, characterized in that the standard coating specimen (4) includes a plurality of reference plates (12) with gradually increasing coating thicknesses and a carrier plate (13). The plurality of reference plates (12) are evenly distributed on the upper plate surface of the carrier plate (13), and the carrier plate (13) is connected to the second driving component (11).

9. A coating thickness measurement method based on infrared non-destructive testing technology, characterized in that it is applicable to the coating thickness measurement system described in any one of claims 1-8, and the method includes: The drive mechanism (5) drives the thermal excitation source (1), the thermal imager (2) and the standard coating specimen (4) to move synchronously to face one of the detection positions on the surface of the component to be detected (6); The thermal excitation source (1) modulates a periodic thermal excitation to heat the surface of the detection position of the component to be detected (6) and the surface of the standard coating specimen (4) periodically; The thermal imager (2) simultaneously collects the thermal wave signals on the surface of the detection position and the thermal wave signals on the surface of the standard coating specimen (4); The host computer (3) analyzes and processes the thermal wave signals on the surface of the detection position and the thermal wave signals on the surface of the standard coating specimen (4), and calculates the coating thickness at the detection position.

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