A non-contact temperature measurement system and method based on organic phosphorescent material

Abstract

This invention provides a non-contact temperature measurement system and method based on organic phosphorescent materials, addressing the technical problem that existing organic phosphorescent materials, due to their performance limitations, cannot monitor ambient temperature based on the shift in phosphorescence emission wavelength. The non-contact temperature measurement system provided by this invention innovatively employs an organic phosphorescent thermosensitive film to sense the temperature of the object under test. This film is obtained by mixing phosphorescent guest molecules, etherified cellulose, and water in a specific ratio, heating and melting the mixture, coating it onto a substrate, and then drying it. Because reversible acetalization can occur between the phosphorescent guest molecules and the etherified cellulose, the phosphorescence emission wavelength of the formed organic phosphorescent thermosensitive film red-shifts with increasing temperature. Therefore, by analyzing the phosphorescence emission wavelength of the organic phosphorescent thermosensitive film, rapid and accurate visualization of the two-dimensional distribution of continuous temperature within the range of 77K-150K can be achieved.

Description

Technical Field

[0001] This invention relates to a phosphorescent temperature measurement system and method, specifically to a non-contact temperature measurement system and method based on organic phosphorescent materials. Background Technology

[0002] Phosphorescent materials are mainly divided into inorganic phosphorescent materials and organic phosphorescent materials. Inorganic phosphorescent materials use metal oxides, sulfides, etc. as matrices and are doped with activators. They are characterized by good stability and long luminescence lifetime. Organic phosphorescent materials are based on organic molecules, and luminescence is controlled through molecular stacking. They are simple to prepare and produce a rich variety of luminescent colors. Phosphorescence thermometry is a novel non-contact measurement technology that measures phosphorescence based on changes in the phosphorescence signal of phosphorescent materials at different temperatures.

[0003] Currently, monitoring ambient temperature based on phosphorescence emission lifetime and intensity is widely reported in the industry, but monitoring based on phosphorescence emission wavelength shift is rarely reported. The main reason is that inorganic phosphorescent materials have stable structures that are difficult to change, thus limiting their luminescence properties. While the development of organic phosphorescent materials has greatly compensated for the shortcomings of inorganic phosphorescent materials, existing organic phosphorescent materials, due to their performance limitations, still cannot monitor ambient temperature based on phosphorescence emission wavelength shift. Summary of the Invention

[0004] To address the technical problem that existing organic phosphorescent materials cannot monitor ambient temperature based on phosphorescence emission wavelength shift due to their performance limitations, a non-contact temperature measurement system and method based on organic phosphorescent materials is provided.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A non-contact temperature measurement system based on organic phosphorescent materials is characterized by including an exciter, an organic phosphorescent temperature-sensitive film, an image sensor, and a data processing module.

[0007] The exciter is used to emit ultraviolet light;

[0008] The organic phosphorescent thermosensitive film is obtained by coating and drying with a phosphorescent mixed solution. The phosphorescent mixed solution is obtained by mixing phosphorescent guest molecules, etherified cellulose, and water in a mass ratio of 1:1000~10000:2000~20000 and then thermally melting them.

[0009] The organophosphorescent thermosensitive film is disposed on the surface of the object to be tested and is located in the emission light path of the exciter, and is used to emit phosphorescent signals under the excitation of ultraviolet light;

[0010] The image sensor is used to image the emitted phosphorescent signal;

[0011] The data processing module stores the temperature-CIE colorimetric standard curve of the organic phosphorescent thermosensitive film. The input end of the data processing module is connected to the output end of the image sensor. It is used to determine the temperature of different pixels in the spectral image of the organic phosphorescent thermosensitive film based on the imaging of the phosphorescent signal and the temperature-CIE colorimetric standard curve of the organic phosphorescent thermosensitive film, thereby obtaining the two-dimensional temperature distribution of the object under test.

[0012] Furthermore, the etherified cellulose is one or a mixture of at least two of hydroxymethyl cellulose, hydroxyethyl cellulose, and hydroxypropyl cellulose;

[0013] The phosphorescent guest molecule is one or a mixture of at least two of the following: 3',5'-dimethoxy-4'-hydroxyacetophenone, 3-methoxybenzaldehyde, 4-methoxy-naphthaldehyde, and 3,4-dimethoxybenzaldehyde.

[0014] Furthermore, the thickness of the organophosphorus photothermal film ranges from 0.2 to 1 mm.

[0015] Furthermore, a light-concentrating cover is provided at the light outlet position of the exciter.

[0016] Furthermore, the exciter is a 254-365 nm ultraviolet lamp;

[0017] The exciter uses an ultraviolet LED surface light source.

[0018] Furthermore, the phosphorescent mixed solution is obtained by mixing 3-methoxybenzaldehyde, hydroxyethyl cellulose, and water in a mass ratio of 1:1000:5000 and then thermally melting them.

[0019] The thickness of the organophosphorus photothermal film is in the range of 0.5 mm.

[0020] Furthermore, the image sensor is a CCD camera or a CMOS camera;

[0021] The image sensor has 2 million to 10 million pixels.

[0022] In addition, the present invention also provides a non-contact temperature measurement method based on organic phosphorescent materials, which is characterized by including the following steps:

[0023] Step 1: Establish the temperature-CIE colorimetric standard curve for the organophosphorescent thermosensitive film;

[0024] The organophosphorescent thermosensitive film was subjected to variable-temperature phosphorescence spectroscopy measurements at multiple measurement temperatures to obtain its variable-temperature phosphorescence spectrum. The variable-temperature phosphorescence spectrum of the organophosphorescent thermosensitive film was then converted into CIE 1931 standard chromaticity space coordinates. The x-value or y-value of the CIE 1931 standard chromaticity space coordinates of the organophosphorescent thermosensitive film at each measurement temperature was fitted with the measurement temperature value to obtain the temperature-CIE chromaticity standard curve of the organophosphorescent thermosensitive film.

[0025] Step 2: Construct the aforementioned non-contact temperature measurement system based on organic phosphorescent materials. After the organic phosphorescent thermosensitive film senses the temperature of the object to be measured, the exciter is turned on. The ultraviolet light emitted by the exciter continuously irradiates the organic phosphorescent thermosensitive film on the surface of the object to be measured, causing the organic phosphorescent thermosensitive film to emit phosphorescent signals. The image sensor performs video monitoring of the emitted phosphorescent signals and transmits the monitoring video to the data processing module. The data processing module captures the key frames that need to be analyzed in the monitoring video and converts the spectral image pixels corresponding to different positions of the organic phosphorescent thermosensitive film from sRGB chromaticity space coordinates to CIE 1931 standard chromaticity space coordinates, obtaining the CIE 1931 standard chromaticity space x or y values ​​of different pixels in the spectral image of the organic phosphorescent thermosensitive film.

[0026] Step 3: Based on the temperature-CIE chromaticity standard curve of the organophosphorescent thermosensitive film obtained in Step 1 and the CIE 1931 standard chromaticity space coordinates x or y values ​​of different pixels in the spectral image of the organophosphorescent thermosensitive film obtained in Step 2, perform CIE chromaticity-temperature analysis to obtain the temperature of different pixels in the spectral image of the organophosphorescent thermosensitive film, and thus obtain the two-dimensional temperature distribution of the object under test.

[0027] Furthermore, in step 1, when performing variable-temperature phosphorescence spectroscopy measurements on the organophosphorescent thermosensitive film, measurements are taken three times at each measurement temperature, and the average value of the CIE 1931 standard chromaticity space coordinates x or y for the same pixel in the spectral image of the organophosphorescent thermosensitive film at each measurement temperature is calculated.

[0028] Further, in step 1, the expression for the temperature-CIE colorimetric standard curve of the organophosphorus photothermal film is:

[0029] y=-0.56592*exp(-T / 62.0482)+0.41314;

[0030] Where T represents the temperature value, and y represents the average y-value of the CIE 1931 standard chromaticity space coordinates of a pixel in the spectral image of the organophosphorus photothermal film.

[0031] The advantages of this invention compared to the prior art are:

[0032] 1. This invention provides a non-contact temperature measurement system based on organic phosphorescent materials. It innovatively uses an organic phosphorescent thermosensitive film to sense the temperature of the object under test. The organic phosphorescent thermosensitive film is obtained by mixing phosphorescent guest molecules, etherified cellulose, and water in a certain proportion, heating and melting them, coating them onto a substrate, and then drying them. Since the phosphorescent guest molecules and etherified cellulose can undergo reversible acetalization, the phosphorescence emission wavelength of the formed organic phosphorescent thermosensitive film redshifts as the temperature increases. Therefore, by analyzing the phosphorescence emission wavelength of the organic phosphorescent thermosensitive film, a rapid and accurate visualized two-dimensional distribution monitoring of continuous temperature within the temperature range of 77K-150K can be achieved.

[0033] 2. This invention provides a non-contact temperature measurement method based on organic phosphorescent materials. A temperature-CIE colorimetric standard curve for the organic phosphorescent thermosensitive film is established. By combining the CIE 1931 standard colorimetric space coordinates (x or y values) of different pixels in the spectral image of the organic phosphorescent thermosensitive film, CIE colorimetric-temperature analysis is performed. This allows for the inverse deduction of the temperature at different pixels in the spectral image of the organic phosphorescent thermosensitive film, thereby obtaining the two-dimensional temperature distribution of the object under test. The method is simple, convenient, and highly practical, and can utilize the phosphorescence emission wavelength shift of the organic phosphorescent thermosensitive film to achieve rapid and accurate environmental temperature measurement. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of an embodiment of a non-contact temperature measurement system based on organic phosphorescent materials according to the present invention;

[0035] Figure 2 The variable-temperature phosphorescence spectrum of the organic phosphorescent thermosensitive film obtained in step 1 of the method embodiment of the present invention;

[0036] Figure 3 This is a schematic diagram of the temperature-CIE colorimetric standard curve obtained by fitting in step 1 of the method embodiment of the present invention;

[0037] Figure 4 This is a schematic diagram illustrating the image capture of key frames to be analyzed in the monitoring video by the data processing module in step 2 of the method embodiment of the present invention.

[0038] Figure 5 This is a schematic diagram of CIE colorimetric-temperature analysis performed in step 3 of an embodiment of the method of the present invention;

[0039] Figure 6 This is a schematic diagram showing the temperature distribution of different pixels in the CIE 1931 standard chromaticity space coordinate y-value scale and the spectral image of the organophosphorescent thermosensitive film in step 3 of the embodiment of the method of the present invention.

[0040] The attached figures are labeled as follows:

[0041] 1-Exciter, 2-Organophosphorus photothermal film, 3-Object under test, 4-Image sensor, 5-Data processing module, 6-Concentrator. Detailed Implementation

[0042] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and 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.

[0043] Example 1

[0044] like Figure 1 As shown, a non-contact temperature measurement system based on organic phosphorescent materials includes an exciter 1, an organic phosphorescent temperature-sensitive film 2, an image sensor 4, and a data processing module 5.

[0045] Exciter 1 is an ultraviolet light emitting device, preferably an ultraviolet lamp with a wavelength of 254-365nm, used to emit ultraviolet light to irradiate the organophosphorus photothermal film 2. In this embodiment, exciter 1 uses an ultraviolet LED surface light source with a wavelength of 365nm and a total power of 100W. Preferably, a light-concentrating cover 6 is provided at the light outlet of exciter 1 to reduce side leakage light loss and improve the irradiance of the target area.

[0046] An organophosphorescent thermosensitive film 2 is disposed on the surface of the object to be tested 3 to sense the temperature information of the surface of the object to be tested 3. At the same time, the organophosphorescent thermosensitive film 2 is also located in the emission light path of the exciter 1 to absorb ultraviolet light and emit phosphorescence under the excitation of ultraviolet light.

[0047] The key point of this invention is to creatively use an organic phosphorescent thermosensitive film 2 to measure the temperature of the object to be tested. The principle is that the temperature of the organic phosphorescent thermosensitive film 2 can respond to the phosphorescence emission performance, that is, the phosphorescence emission wavelength redshifts (increases) as the temperature increases within the range of 77K-150K.

[0048] Specifically, the preparation method of the organophosphorus photothermal film 2 is as follows:

[0049] Phosphorescent guest molecules, etherified cellulose, and water are mixed at a mass ratio of 1:1000~10000:2000~20000, and the mixture is heated until completely dissolved to obtain a phosphorescent mixed solution. The phosphorescent mixed solution is then coated onto a substrate and dried at 40~60℃ for 12~24 hours. The film layer formed on the substrate surface is the organic phosphorescent thermosensitive film 2. The phosphorescent guest molecules are one or a mixture of at least two of 3',5'-dimethoxy-4'-hydroxyacetophenone, 3-methoxybenzaldehyde, 4-methoxy-naphthaldehyde, and 3,4-dimethoxybenzaldehyde, and the etherified cellulose is one or a mixture of at least two of hydroxymethyl cellulose, hydroxyethyl cellulose, and hydroxypropyl cellulose. In this embodiment, the organophosphorus thermosensitive film 2 is prepared by mixing 3-methoxybenzaldehyde, hydroxyethyl cellulose and water in a mass ratio of 1:1000:5000, and keeping it at 80°C for 60 minutes to stir and dissolve it. Then, it is coated on the substrate and dried at 60°C for 12 hours.

[0050] In addition, in order to ensure the real-time performance of the organophosphorus photothermal film 2 in response to the temperature of the object being measured, the thickness range of the organophosphorus photothermal film 2 is preferably set to 0.2~1mm, and in this embodiment it is 0.5mm.

[0051] Image sensor 4 is a CCD camera or CMOS camera (complementary metal-oxide-semiconductor) with 2 million to 10 million pixels. In this embodiment, a 10 million pixel CMOS camera is used to perform high-definition imaging of the emitted phosphorescent signal and transmit it to the data processing module 5 via wired or wireless transmission.

[0052] The data processing module 5 uses Origin data processing software, which stores the temperature-CIE colorimetric standard curve of the organic phosphorescent thermosensitive film. The input end of the data processing module 5 is connected to the output end of the image sensor 4. It is used to determine the temperature of different pixels in the spectral image of the organic phosphorescent thermosensitive film 2 based on the imaging of the phosphorescence signal and combined with the temperature-CIE colorimetric standard curve of the organic phosphorescent thermosensitive film, thereby obtaining the two-dimensional temperature distribution of the object under test.

[0053] The surface temperature of a stainless steel tank (30cm long, 10cm inner diameter, 12cm outer diameter) during the addition of liquid nitrogen was measured using the aforementioned non-contact temperature measurement system based on organic phosphorescent materials. Since the change in the phosphorescence emission wavelength shift of the organic phosphorescent temperature-sensitive film 2 can be reflected by the phosphorescence spectrum, this invention utilizes the phosphorescence spectrum of the organic phosphorescent temperature-sensitive film 2 to achieve environmental temperature measurement. A non-contact temperature measurement method based on organic phosphorescent materials specifically includes the following steps:

[0054] Step 1: First, determine the dimensions of the organophosphorescent thermosensitive film 2 based on the length of the stainless steel tank. In this embodiment, the organophosphorescent thermosensitive film 2 is 30cm long, 3cm wide, and 2mm thick. When performing variable-temperature phosphorescence spectroscopy measurements, the prepared organophosphorescent thermosensitive film 2 of the corresponding dimensions can be directly used for these measurements. Alternatively, a phosphorescent mixed solution, consisting of phosphorescent guest molecules, etherified cellulose, and water, can be mixed and thermally melted, then coated onto the object to be tested 3 according to the corresponding dimensions, dried to form the organophosphorescent thermosensitive film 2, and then subjected to variable-temperature phosphorescence spectroscopy measurements.

[0055] In this embodiment, 3-methoxybenzaldehyde, hydroxyethyl cellulose, and water were mixed in a mass ratio of 1:1000:5000 and dissolved by stirring at 80 degrees Celsius. The resulting solution was then applied to a stainless steel container with dimensions of 30 cm in length, 3 cm in width, and 2 mm in thickness. After drying at 60 degrees Celsius for 12 hours, an organophosphorescent thermosensitive film 2 was obtained. Liquid nitrogen was then continuously added to the stainless steel container, and variable-temperature phosphorescence spectroscopy measurements were performed on the organophosphorescent thermosensitive film 2 covering the container. Measurements were taken at temperatures of 77 K, 90 K, 111 K, 150 K, and 180 K, with each temperature point measured three times. Figure 2 The obtained temperature-varying phosphorescence spectrum of the organic phosphorescent thermosensitive film 2 is shown in Table 1. The temperature-varying phosphorescence spectrum of the organic phosphorescent thermosensitive film 2 was converted to CIE 1931 standard chromaticity space coordinates using Ogin software, obtaining the CIE 1931 standard chromaticity space coordinates of the organic phosphorescent thermosensitive film 2 at multiple measurement temperatures. The CIE 1931 standard chromaticity space coordinates of the organic phosphorescent thermosensitive film 2 include the x-values ​​on the horizontal axis and the y-values ​​on the vertical axis, as detailed in Table 1.

[0056] Table 1. x and y values ​​of organophosphorus photothermal films at different temperatures in CIE 1931 standard color space coordinates.

[0057]

[0058] First, the three sets of measurements at the same measurement temperature were averaged. The average revealed that the CIE 1931 standard chromaticity space coordinate y-value of the organophosphorescent thermosensitive film 2 showed a larger variation. Therefore, in this embodiment, the average y-value of the CIE 1931 standard chromaticity space coordinate of the organophosphorescent thermosensitive film 2 was selected for fitting. In other embodiments, the average x-value of the CIE 1931 standard chromaticity space coordinate of the organophosphorescent thermosensitive film 2 can also be selected for fitting, depending on the variation range of the x and y values.

[0059] The mean y-values ​​of the CIE 1931 standard chromaticity space coordinates of the organic phosphorescent thermosensitive film 2 at each measurement temperature were fitted to the measurement temperature value to obtain the temperature-CIE chromaticity standard curve of the organic phosphorescent thermosensitive film 2. The fitted temperature-CIE chromaticity standard curve is shown in the figure below. Figure 3 As shown. The temperature-CIE colorimetric standard curve expression for organophosphorus photothermal film 2 is:

[0060] y=-0.56592*exp(-T / 62.0482)+0.41314

[0061] Where T represents the temperature value, and y represents the average y-value of the CIE 1931 standard chromaticity space coordinates of a certain pixel in the spectral image of the organophosphorus photothermal film 2.

[0062] Step 2: Build the above-mentioned non-contact temperature measurement system based on organic phosphorescent material. Note that the CMOS camera and exciter 1 should be in the same direction, and the distance d between the CMOS camera and the stainless steel tank should be 30cm.

[0063] After the organophosphorescent thermosensitive film 2 senses the temperature of the stainless steel tank, the exciter 1 is turned on. The ultraviolet light emitted by the exciter 1 continuously irradiates the organophosphorescent thermosensitive film 2 on the surface of the stainless steel tank, causing the organophosphorescent thermosensitive film 2 to emit phosphorescent signals. The image sensor 4 uses a shooting mode of 60 frames per second to monitor the emitted phosphorescent signals and transmits the captured video to the data processing module 5. Figure 4 As shown, the data processing module 5 captures images of the key frames to be analyzed in the monitoring video to obtain the spectral image of the organophosphorescent thermosensitive film 2. Then, it converts the spectral image pixels corresponding to different positions of the organophosphorescent thermosensitive film 2 from sRGB chromaticity space coordinates to CIE 1931 standard chromaticity space coordinates to obtain the CIE 1931 standard chromaticity space coordinate y values ​​of different pixels in the spectral image of the organophosphorescent thermosensitive film 2.

[0064] Step 3, as follows Figure 5 As shown, based on the temperature-CIE colorimetric standard curve of the organophosphorescent thermosensitive film 2 obtained in step 1 and the CIE 1931 standard colorimetric space coordinates (y-values) of different pixels in the spectral image of the organophosphorescent thermosensitive film 2 obtained in step 2, CIE colorimetric-temperature analysis is performed to inversely obtain the temperature of different pixels in the spectral image of the organophosphorescent thermosensitive film 2. Specifically, the CIE 1931 standard colorimetric space coordinates (y-values) of each pixel in the spectral image of the organophosphorescent thermosensitive film 2 are substituted into the temperature-CIE colorimetric standard curve expression in step 1 to calculate the corresponding temperature value. For example... Figure 6 As shown, the left side displays a scale set according to the y-coordinates of the CIE 1931 standard chromaticity space, and the right side displays the temperature distribution of different pixels in the obtained spectral image of the organophosphorescent thermosensitive film 2. Finally, the two-dimensional temperature distribution of the object under test 3 is obtained based on the temperature distribution of different pixels in the spectral image of the organophosphorescent thermosensitive film 2.

[0065] Example 2

[0066] The only difference between this embodiment and Embodiment 1 is the preparation ratio, heating temperature, and drying temperature of the organophosphorescent thermosensitive film 2. In this embodiment, the organophosphorescent thermosensitive film 2 is prepared by mixing 3',5'-dimethoxy-4'-hydroxyacetophenone, hydroxymethyl cellulose, and water in a mass ratio of 1:1000:10000, heating to 80°C and maintaining the mixture for 60 minutes while stirring to dissolve it, then coating it onto a substrate and drying it at 60°C for 12 hours.

[0067] Example 3

[0068] The only difference between this embodiment and Embodiment 1 is the preparation ratio, heating temperature, and drying temperature of the organophosphorescent thermosensitive film 2. In this embodiment, the organophosphorescent thermosensitive film 2 is prepared by mixing 4-methoxy-naphthaldehyde, hydroxypropyl cellulose, and water in a mass ratio of 1:4000:5000, heating to 60°C and maintaining the temperature for 90 minutes while stirring to dissolve the mixture, then coating it onto a substrate and drying it at 40°C for 24 hours.

[0069] Example 4

[0070] The only difference between this embodiment and Embodiment 1 is the preparation ratio, heating temperature, and drying temperature of the organophosphorescent thermosensitive film 2. In this embodiment, the organophosphorescent thermosensitive film 2 is prepared by mixing 3,4-dimethoxybenzaldehyde, hydroxyethyl cellulose, and water in a mass ratio of 1:10000:20000, heating to 40°C and holding for 100 minutes to stir and dissolve, then coating it onto a substrate and drying it at 50°C for 17 hours.

[0071] In other embodiments of the present invention, the mass ratio of the phosphorescent guest molecule, etherified cellulose, and water can be selected as needed within the range of 1:1000~10000:2000~20000. It is worth noting that the temperature-color standard curves of the organic phosphorescent thermosensitive film 2 prepared with different mass ratios will also differ.

[0072] The temperature and time for heating the mixed materials, as well as the drying time after the phosphorescent mixed solution is coated on the glass plate, can be selected as needed. However, the heating temperature must meet the temperature limit of 30~80℃, and the drying temperature must meet the temperature limit of 40~60℃. Too high or too low a temperature will affect the acetalization effect.

[0073] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present invention should be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A non-contact temperature measurement system based on organic phosphorescent materials, characterized in that: It includes an exciter (1), an organophosphorus photothermal film (2), an image sensor (4), and a data processing module (5); The exciter (1) is used to emit ultraviolet light; The organic phosphorescent thermosensitive film (2) is obtained by coating and drying with a phosphorescent mixed solution. The phosphorescent mixed solution is obtained by mixing phosphorescent guest molecules, etherified cellulose and water in a mass ratio of 1:1000~10000:2000~20000 and then thermally melting them. The organic phosphorescent thermosensitive film (2) is disposed on the surface of the object to be tested (3) and is located in the emission light path of the exciter (1) to emit phosphorescent signals under the excitation of ultraviolet light. The image sensor (4) is used to image the emitted phosphorescent signal; The data processing module (5) stores the temperature-CIE colorimetric standard curve of the organic phosphorescent thermosensitive film (2); the input end of the data processing module (5) is connected to the output end of the image sensor, and is used to determine the temperature of different pixels in the spectral image of the organic phosphorescent thermosensitive film (2) based on the imaging of the phosphorescent signal and combined with the temperature-CIE colorimetric standard curve of the organic phosphorescent thermosensitive film (2), thereby obtaining the two-dimensional temperature distribution of the object to be tested (3).

2. The non-contact temperature measurement system based on organic phosphorescent materials according to claim 1, characterized in that: The etherified cellulose is one or a mixture of at least two of hydroxymethyl cellulose, hydroxyethyl cellulose, and hydroxypropyl cellulose; The phosphorescent guest molecule is one or a mixture of at least two of the following: 3',5'-dimethoxy-4'-hydroxyacetophenone, 3-methoxybenzaldehyde, 4-methoxy-naphthaldehyde, and 3,4-dimethoxybenzaldehyde.

3. A non-contact temperature measurement system based on organic phosphorescent materials according to claim 1 or 2, characterized in that: The thickness of the organophosphorus photothermal film (2) ranges from 0.2 to 1 mm.

4. The non-contact temperature measurement system based on organic phosphorescent materials according to claim 3, characterized in that: A light-collecting cover (6) is provided at the light outlet position of the exciter (1).

5. A non-contact temperature measurement system based on organic phosphorescent materials according to claim 4, characterized in that: The exciter (1) is a 254-365 nm ultraviolet lamp; The exciter (1) uses an ultraviolet LED surface light source.

6. A non-contact temperature measurement system based on organic phosphorescent materials according to claim 5, characterized in that: The phosphorescent mixed solution was obtained by mixing 3-methoxybenzaldehyde, hydroxyethyl cellulose and water in a mass ratio of 1:1000:5000 and then thermally melting them. The thickness of the organophosphorus photothermal film (2) is 0.5 mm.

7. The non-contact temperature measurement system based on organic phosphorescent materials according to claim 1, characterized in that: The image sensor is a CCD camera or a CMOS camera; The image sensor has 2 million to 10 million pixels.

8. A non-contact temperature measurement method based on an organic phosphorescent material, characterized by, Includes the following steps: Step 1: Establish the temperature-CIE colorimetric standard curve of the organophosphorus photothermal film (2); The organophosphorescent thermosensitive film (2) was subjected to variable-temperature phosphorescence spectroscopy measurements at multiple measurement temperatures to obtain the variable-temperature phosphorescence spectrum of the organophosphorescent thermosensitive film (2); the variable-temperature phosphorescence spectrum of the organophosphorescent thermosensitive film (2) was converted into CIE 1931 standard chromaticity space coordinates; the x-value or y-value of the CIE 1931 standard chromaticity space coordinates of the organophosphorescent thermosensitive film (2) at each measurement temperature was fitted with the measurement temperature value to obtain the temperature-CIE chromaticity standard curve of the organophosphorescent thermosensitive film (2); Step 2: Construct a non-contact temperature measurement system based on organic phosphorescent material as described in any of claims 1-7; after the organic phosphorescent thermosensitive film (2) senses the temperature of the object to be measured (3), turn on the exciter (1), and the ultraviolet light emitted by the exciter (1) continuously irradiates the organic phosphorescent thermosensitive film (2) on the surface of the object to be measured (3), so that the organic phosphorescent thermosensitive film (2) emits phosphorescent signal; the image sensor (4) performs video monitoring on the emitted phosphorescent signal and transmits the monitoring video to the data processing module (5); the data processing module (5) captures the key frames that need to be analyzed in the monitoring video, and converts the spectral image pixels corresponding to different positions of the organic phosphorescent thermosensitive film (2) from sRGB color space coordinates to CIE 1931 standard color space coordinates, and obtains the CIE 1931 standard color space coordinate x or y values ​​of different pixels in the spectral image of the organic phosphorescent thermosensitive film (2); Step 3: Based on the temperature-CIE chromaticity standard curve of the organic phosphorescent thermosensitive film (2) obtained in Step 1 and the x or y values ​​of the CIE 1931 standard chromaticity space coordinates of different pixels of the spectral image of the organic phosphorescent thermosensitive film (2) obtained in Step 2, perform CIE chromaticity-temperature analysis to obtain the temperature of different pixels of the spectral image of the organic phosphorescent thermosensitive film (2), and then obtain the two-dimensional temperature distribution of the object to be tested (3).

9. A non-contact temperature measurement method based on organic phosphorescent materials according to claim 8, characterized in that: In step 1, when performing variable temperature phosphorescence spectroscopy measurements on the organic phosphorescent thermosensitive film (2), the measurements are taken three times at each measurement temperature, and the average value of the x or y coordinates of the same pixel point in the CIE 1931 standard chromaticity space of the organic phosphorescent thermosensitive film (2) at each measurement temperature is calculated.

10. A non-contact temperature measurement method based on organic phosphorescent materials according to claim 9, characterized in that: In step 1, the expression for the temperature-CIE colorimetric standard curve of the organophosphorus photothermal film (2) is: y=-0.56592*exp(-T / 62.0482)+0.41314; Where T represents the temperature value and y represents the average y value of the CIE 1931 standard chromaticity space coordinates of a certain pixel in the spectral image of the organophosphorus photothermal film (2).

Images