Indirect calibration method and calibration device for radiation energy meter

Abstract

The present invention relates to the technical field of illumination instrument calibration, and specifically to an indirect calibration method and device for a radiation energy meter. A light-absorbing black box is placed under an illumination panel; the radiation energy meter to be calibrated is placed in the black box, and a temperature sensor is arranged in the black box; the illumination panel is turned on to illuminate the black box, the temperature sensor records the test light temperature, and the radiation energy meter records the test light intensity; an illumination test is performed based on the same test environment and a standard radiation energy meter to construct a linear relationship between the standard light intensity and the standard light temperature under the test environment; based on the linear relationship between the test light temperature and the standard light intensity and the standard light temperature, the standard light intensity corresponding to the test light temperature is obtained; a correction coefficient is obtained through the standard light intensity and the test light intensity; and the radiation energy meter to be calibrated is adjusted based on the correction coefficient. The calibration method of the present invention is simple, accurate, and has a low calibration cost.

Description

Technical Field

[0001] The present invention relates to the technical field of illumination instrument calibration, and in particular to an indirect calibration method and a calibration device for a radiation energy meter. Background Art

[0002] The radiation energy meter used to control the light intensity of the vehicle's artificial simulated exposure test will gradually deviate from its measurement results due to the aging of its photoresistors and other electronic components, as well as changes in the chromaticity of the blackbody that absorbs light energy. This requires continuous correction of the photosensitivity coefficient. Calibration of radiation energy meters can only be performed by professional metrology departments, and this can only be done periodically; real-time correction is not possible. The laboratory's radiation energy meter is connected to the equipment control system and cannot be calibrated independently. Calibration can only be performed on-site by the relevant metrology department. On-site calibration is relatively expensive, and because the radiation energy meter is in constant use and requires intermittent calibration, it is impossible to ensure that the light intensity emitted by the radiation energy meter is at the nominal intensity at all times. Any discrepancy in light intensity can result in, at best, failure of the exposure test and erroneous data, or, at worst, damage to the vehicle, seriously impacting the vehicle's exposure test progress. Summary of the Invention

[0003] The purpose of the present invention is to solve the deficiencies of the above-mentioned background technology and to provide an indirect calibration method and a calibration device for a radiation energy meter.

[0004] The technical solution of the present invention is: a method for indirect calibration of a radiation energy meter, comprising: placing a light-absorbing black box under an illumination board; placing the radiation energy meter to be calibrated in the black box, and arranging a plurality of temperature sensors in the black box near the radiation energy meter; turning on the illumination board to illuminate the black box according to a set illumination time, and recording the test illumination temperature and the test illumination intensity displayed by the radiation energy meter to be calibrated by the temperature sensor; performing an illumination test based on the same test environment and a standard radiation energy meter to construct a standard linear relationship between the standard illumination intensity and the standard illumination temperature under the test environment; obtaining a standard illumination intensity corresponding to the test illumination temperature based on the test illumination temperature and the standard linear relationship; obtaining a correction coefficient through the standard illumination intensity and the test illumination intensity; and adjusting the radiation energy meter to be calibrated based on the correction coefficient.

[0005] According to a method for indirect calibration of a radiation energy meter provided by the present invention, the method for adjusting the radiation energy meter to be calibrated based on the correction coefficient includes: adjusting the original GAIN value according to the product of the correction coefficient and the original GAIN value of the radiation energy meter to be calibrated to obtain a corrected GAIN value; adjusting the original OFFSET value according to the product of the correction coefficient and the original OFFSET value of the radiation energy meter to be calibrated to obtain a corrected OFFSET value.

[0006] According to a method for indirect calibration of a radiation energy meter provided by the present invention, the method of placing a light-absorbing black box under the illumination plate is as follows: the black box is arranged at a set distance below the illumination plate, a light-absorbing black base plate is provided at the bottom of the black box, and a wind shield is arranged around the end surface of the black base plate, wherein the wind shield is perpendicular to the black base plate and parallel to the light irradiated onto the black base plate by the illumination plate.

[0007] According to an indirect calibration method for a radiation energy meter provided by the present invention, the method of arranging windshields around the end surface of a black base plate includes: arranging a vertical plate higher than other windshields on the upstream side of the black base plate along the flow field direction.

[0008] According to an indirect calibration method for a radiation energy meter provided by the present invention, the method of arranging multiple temperature sensors in a black box includes: simultaneously arranging multiple temperature sensors at a certain point on the end surface of a black base plate.

[0009] According to an indirect calibration method for a radiation energy meter provided by the present invention, the method of obtaining a correction coefficient through standard light intensity and test light intensity includes: using the ratio of the test light intensity to the standard light intensity as the correction coefficient.

[0010] According to a method for indirect calibration of a radiation energy meter provided by the present invention, the method for conducting an illumination test based on the same test environment and a standard radiation energy meter to establish a standard linear relationship between standard light intensity and standard light temperature in the test environment includes: arranging a black box, a temperature sensor and a standard radiation energy meter under an illumination board according to the same test requirements; turning on the illumination board to illuminate the black box, the temperature sensor recording the standard light temperature, and the standard radiation energy meter recording the standard light intensity; adjusting the illumination intensity of the illumination board, recording the standard light temperature and standard light intensity under different illumination intensities, and fitting the standard light temperature and standard light intensity obtained from the standard test to obtain a standard linear relationship between the standard light temperature and the standard light intensity.

[0011] A radiation energy meter indirect calibration device, comprising:

[0012] Light board;

[0013] Black box, located below the illumination panel;

[0014] A temperature measurement module is provided in the black box and is used to measure the test light temperature of the black box under the illumination of the illumination board;

[0015] Light intensity recording module, used to record the test light intensity displayed by the radiation energy meter to be calibrated in the black box;

[0016] A standard linear relationship storage module is used to store a standard linear relationship between standard light intensity and standard light temperature in the test environment, which is constructed based on a light test conducted in the same test environment and using a standard radiation energy meter;

[0017] A correction coefficient module is used to calculate the correction coefficient based on the test light intensity, test light temperature and standard linear relationship;

[0018] The adjustment module is used to adjust the GAIN value and OFFSET value of the radiation energy meter to be calibrated according to the correction coefficient.

[0019] According to the indirect calibration device of a radiation energy meter provided by the present invention, the black box includes:

[0020] The black base plate is located directly below the illumination plate and is perpendicular to the light from the illumination plate onto the black base plate;

[0021] Wind shields are installed around the upper end of the black base plate to prevent air flow from interfering with the test.

[0022] According to an indirect calibration device for a radiation energy meter provided by the present invention, the adjustment module is used to adjust the GAIN value of the radiation energy meter to be calibrated according to the product of the correction coefficient and the original GAIN value of the radiation energy meter to be calibrated, and to adjust the OFFSET value of the radiation energy meter to be calibrated according to the product of the correction coefficient and the original OFFSET value of the radiation energy meter to be calibrated.

[0023] The advantages of the present invention are as follows: 1. The present invention pre-constructs a standard linear relationship between standard light intensity and standard light temperature under the same test environment, then obtains the test light temperature and the test light intensity of the radiation energy meter to be calibrated under the same test environment, and obtains the corresponding standard light intensity based on the test light temperature and the standard linear relationship. Then, the correction coefficient of the radiation energy meter to be calibrated can be obtained through the standard light intensity and the test light intensity. The radiation energy meter can be calibrated based on the correction coefficient. The entire calibration method is extremely simple, does not require on-site service from the metrology department, the calibration cost is extremely low, and the calibration is also extremely accurate.

[0024] 2. The present invention is extremely simple for calibrating a radiation energy meter to be calibrated. It only needs to multiply the correction coefficient by the original GAIN value of the radiation energy meter to obtain the calibrated GAIN value of the radiation energy meter, and multiply the correction coefficient by the original OFFSET value of the radiation energy meter to obtain the calibrated OFFSET value of the radiation energy meter. The calibrated radiation energy meter can be obtained by adjusting according to the calibrated value, and the calibration adjustment is extremely convenient.

[0025] 3. The present invention constructs a black box under the illumination board. The bottom of the black box is a black base plate. The black base plate has a good light absorption effect, which minimizes light reflection, ensures the linear relationship between illumination temperature and illumination intensity, and improves the accuracy of the entire calibration method.

[0026] 4. The present invention arranges a vertical plate that is higher than other windshields on the upstream side of the black bottom plate along the flow field direction. The vertical plate blocks the flow field airflow, avoiding disturbance of the airflow in the black box and affecting the linear relationship between temperature and light intensity, thereby improving the accuracy of the calibration test.

[0027] 5. The present invention arranges multiple temperature sensors at a certain point in the black box to avoid inaccurate tests caused by temperature sensor failure. Multiple temperature sensors measure temperature simultaneously, eliminating the problems caused by failure to the test to the greatest extent.

[0028] 6. The present invention calculates the correction coefficient by displaying the ratio of the light intensity, i.e., the test light intensity, to the corresponding standard light intensity. The correction coefficient is obtained in an extremely simple and convenient manner.

[0029] 7. The present invention is very simple to construct a standard linear relationship between standard light temperature and standard light intensity. After the metrology department completes the calibration of the radiation energy meter and determines that the current radiation energy meter is accurate, the standard linear relationship between standard light temperature and standard light intensity can be constructed based on the radiation energy meter in the same test environment. This standard linear relationship can then be stored for easy use in subsequent calibration tests. The method is simple, does not require the investment of other equipment and facilities, and the calibration method is accurate.

[0030] 8. The present invention also provides an indirect calibration device for a radiation energy meter. The device includes multiple modules. The multiple modules work together to calibrate the radiation energy meter at a very low cost. The calibration results are accurate, the calibration method is simple, and the cost is extremely low.

[0031] 9. The black box designed for calibration in this invention can absorb light to the maximum extent, so that the test light intensity and test light temperature are in a linear relationship, ensuring the accuracy of the calibration test;

[0032] 10. The calibration device of the present invention is extremely simple in adjusting the radiation energy meter, which greatly facilitates the calibration of the radiation energy meter.

[0033] The calibration method of the present invention is extremely simple. By constructing a standard linear relationship between standard light intensity and standard light temperature, and obtaining the test light temperature and test light intensity under the same test environment, the correction coefficient can be obtained. This method can facilitate accurate calibration of the radiation energy meter to be calibrated, is extremely low in cost, and has great promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 : Schematic diagram of the arrangement structure of the calibration device and the illumination board of the present invention;

[0035] Figure 2 : Schematic diagram of the arrangement structure of the temperature sensor and radiation energy meter of the present invention;

[0036] Among them: 1 - lighting board; 2 - black base plate; 3 - wind shield; 4 - temperature sensor; 5 - radiation energy meter; 6 - vertical board. DETAILED DESCRIPTION

[0037] The embodiments of the present invention are described in detail below, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but are not to be construed as limiting the present invention.

[0038] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0040] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] like Figures 1-2 This embodiment relates to an indirect calibration method for a radiation energy meter. The calibration method of this embodiment is used to calibrate the radiation energy meter, which solves the problem that the existing radiation energy meter requires a special metrology department to calibrate it on-site, which is costly and time-consuming. The calibration method of this embodiment is extremely simple and convenient, with low cost, and the radiation energy meter can be calibrated at any time in the exposure test workshop.

[0042] The specific calibration method of this embodiment is performed according to the following steps: S1, a black box is arranged below the illumination board 1. The black box is used to absorb the light from the illumination board. After absorbing the light, the temperature rises to simulate the real car exposure environment. The black box is directly below the illumination board 1 and is 1m to 1.5m away from the illumination board 1 (corresponding to the distance of the real car exposure test, that is, in the real exposure test, the distance between the top of the car and the illumination board 1 is 1000mm to 1500mm, preferably 1100mm);

[0043] S2. Place the radiation energy meter 5 to be calibrated in the black box so that it faces the illumination board 1. Place multiple temperature sensors 4 in the black box so that they also face the illumination board 1. Multiple temperature sensors 4 measure the illumination temperature simultaneously to avoid inaccurate measurements caused by a malfunction of one of the temperature sensors 4.

[0044] S3. Turn on the light board 1. Since the light intensity 1 of the exposure test is generally not less than 1000W / m 2 , so the illumination intensity of illumination panel 1 can be adjusted to 1000W / m 2 During the test, the light emitted by the illumination board 1 is irradiated onto the black box for a set time, which in this embodiment is 14 to 15 hours. The maximum light intensity displayed by the radiation energy meter 5 to be calibrated during the test is recorded as the test light intensity, and the temperature corresponding to the maximum light intensity of the temperature sensor 4 is recorded as the test light temperature.

[0045] S4. Conduct illumination test based on the same test environment and standard radiation energy meter. Establish a linear relationship between standard illumination intensity and standard illumination temperature in the test environment. After the radiation energy meter is calibrated by the metrology department, a standard test can be conducted. The standard test can adjust the illumination intensity of the illumination panel 1 under the same environment, for example, from 1200W / m 2 , 1000W / m 2 , 800W / m 2 , 600W / m 2 , 400W / m 2 …, record the maximum light intensity under each set light intensity as the standard light intensity, record the temperature under the maximum light intensity as the standard light temperature, and then construct a standard linear relationship between the standard light temperature and the standard light intensity;

[0046] S5. Based on the standard linear relationship between the test light temperature, the standard light intensity, and the standard light temperature, obtain the standard light intensity corresponding to the test light temperature. Substituting the test light temperature into the standard linear relationship, the standard light intensity corresponding to the test light temperature can be obtained.

[0047] S6. Obtain a correction coefficient using the standard light intensity and the test light intensity. The standard light intensity and the test light intensity can be used to establish an adjustment relationship for the radiation energy meter, and the correction coefficient of this embodiment can be constructed using this relationship.

[0048] S7. Adjust the radiation energy meter 5 to be calibrated based on the correction coefficient. The radiation energy meter 5 of this embodiment (the radiation energy meter of this embodiment is a CM 4 radiation energy meter produced by Kipp & Zonen BV (New Zealand)) is a light intensity test structure in which the light intensity and current have a linear relationship. The relationship between the light intensity and current displayed by the radiation energy meter 5 is shown in the following formula:

[0049] E=GAIN*I+OFFSET

[0050] Where: E is the light intensity displayed by the radiation energy meter;

[0051] GAIN——Gain, that is, the slope of the straight line, can be adjusted;

[0052] I——current of radiation energy meter;

[0053] OFFSET - intercept, that is, the point where the straight line intersects the ordinate, which can be adjusted;

[0054] The GAIN and OFFSET are modified based on the correction coefficient to obtain the corrected GAIN' and OFFSET', and then the radiation energy meter is adjusted according to the corrected GAIN' and OFFSET' to complete the calibration of the radiation energy meter.

[0055] In a preferred embodiment, in step S7 described above, the method for adjusting the radiation energy meter 5 to be calibrated based on the correction coefficient includes: adjusting the original GAIN value according to the product of the correction coefficient and the original GAIN value of the radiation energy meter 5 to be calibrated to obtain a corrected GAIN value; adjusting the original OFFSET value according to the product of the correction coefficient and the original OFFSET value of the radiation energy meter 5 to be calibrated to obtain a corrected OFFSET value.

[0056] That is, make corrections according to the following formula:

[0057] GAIN'=λ*GAIN;

[0058] OFFSET'=λ*OFFSET;

[0059] Among them: GAIN - gain, that is, the slope of the straight line;

[0060] OFFSET - intercept, that is, the point where the straight line intersects the ordinate;

[0061] λ——correction coefficient;

[0062] The corrected light intensity is:

[0063] E'=GAIN'*I+OFFSET'.

[0064] In another optional embodiment, this embodiment is to arrange the black box described in step S1 above, such as Figures 1-2 The black box structure of this embodiment is shown in the figure. The black box includes a black base plate 2 at the bottom. The black base plate 2 is used to absorb the light radiation from the illumination panel, absorbing the light energy and then heating up. The black base plate 2 has excellent light absorption properties. A windshield 3 is provided around the upper end of the black base plate 2. The windshield 3 is perpendicular to the black base plate 2 at its lower end and extends vertically at its upper end. It is used to block airflow from sweeping across the temperature sensor 4 and radiation energy meter 5 on the black base plate 2, thereby preventing temperature feedback distortion caused by air flow. The black base plate 2 is located directly below the illumination panel 1 and perpendicular to the light emitted by the illumination panel 1, allowing it to absorb the light radiation from the illumination panel 1 to the greatest extent possible.

[0065] In a further embodiment, the black box's windshield structure is further optimized by placing a vertical plate 6, taller than the other windshields 3, on the upstream side of the black base plate 2 along the flow field direction. This embodiment directly places the vertical plate 6, taller than the other windshields 3, upstream of the flow field air flow direction. Using the taller vertical plate 6 to shield the black base plate 2 further prevents the flow field air from sweeping across the temperature sensor 4 and radiation energy meter 5 on the black base plate 2.

[0066] In another embodiment, the temperature sensor 4 is arranged in the black box. Figure 2 As shown, multiple temperature sensors 4 are simultaneously arranged at a certain point on the upper end surface of the black base plate 2. In this embodiment, four temperature sensors 4 are arranged. The purpose of arranging multiple temperature sensors 4 is to avoid the problem of inaccurate temperature measurement caused by the failure of a temperature sensor 4. The simultaneous measurement of the position of a certain point by multiple temperature sensors 4 can minimize errors. For example, if four temperature sensors 4 are set, when the maximum temperatures monitored by the four temperature sensors 4 are almost the same, the average of the temperatures measured by the four temperature sensors 4 is selected as the maximum temperature. If one of the four temperature sensors 4 has a large deviation, the temperature measured by this temperature sensor 4 is discarded, and the average temperature of the remaining three temperature sensors 4 is calculated as the maximum temperature.

[0067] In a preferred embodiment, the method for calculating the correction coefficient by using the standard light intensity and the test light intensity is as follows: the ratio of the test light intensity to the standard light intensity is used as the correction coefficient, that is, it is calculated according to the following formula:

[0068] λ=E / Eb

[0069] Where: λ——light intensity correction coefficient;

[0070] E - test light intensity, that is, the maximum light intensity displayed by the radiation energy meter during the test;

[0071] Eb - the standard light intensity corresponding to the test light temperature in the standard linear relationship;

[0072] The light intensity correction coefficient can be easily calculated according to the above formula.

[0073] In an optional embodiment, the above-mentioned step S4 is further optimized, and a lighting test is carried out based on the same test environment and a standard radiation energy meter to construct a standard linear relationship between the standard light intensity and the standard light temperature under the test environment. The same test environment means that the black box is placed at the same height position below the lighting board 1, and the temperature sensor 4 and the radiation energy meter 5 are arranged in the same way. At this time, the radiation energy meter 5 is a standard radiation energy meter that has been calibrated by the metrology department, that is, the light intensity displayed by the radiation energy meter 5 at this time can be considered accurate.

[0074] In actual application, the maximum light intensity is 600W / m 2 Above, the maximum temperature in the black box is completely linear with the maximum light intensity, 600W / m 2 The following is no longer a linear relationship. Considering that the maximum light intensity of the exposure test will not be less than 1000W / m 2 , so take 600~1200W / m 2 The linear relationship between the illumination intensity and the maximum temperature of the black box is established by adjusting the illumination intensity of the illumination board 1 to 600W / m 2 , 800W / m 2 , 1000W / m 2 , 1200W / m 2 Conduct an experiment, perform a 15-hour illumination test at each illumination intensity, record the maximum illumination intensity displayed by the radiation energy meter 5 at this illumination intensity as the standard illumination intensity, and then record the temperature monitored by the temperature sensor 4 corresponding to the moment when the standard illumination intensity appears as the standard illumination temperature. Then perform a linear fit between the standard illumination intensity and the standard illumination temperature recorded in the above experiment, and you can get a formula corresponding to the standard illumination intensity and the standard illumination temperature:

[0075] E=AT+B

[0076] Where: E——standard light intensity;

[0077] A——first coefficient;

[0078] B——second coefficient;

[0079] T——standard light temperature.

[0080] Both A and B can be obtained through linear fitting. The above construction is the standard linear relationship between standard light intensity and standard light temperature.

[0081] The present invention also provides an indirect calibration device for a radiation energy meter. The standard device of this embodiment includes an illumination board 1, a black box, a temperature measurement module, a light intensity recording module, a standard linear relationship storage module, a correction coefficient module and an adjustment module, wherein the black box is located below the illumination board and is used to receive the light radiation of the illumination board. The temperature measurement module is arranged in the black box to measure the test light temperature of the black box under the illumination of the illumination board 1. The light intensity recording module is used to record the test light intensity of the radiation energy meter 5 to be calibrated in the black box. The standard linear relationship storage module is used to store the standard linear relationship between the standard light intensity and the standard light temperature in the test environment, which is constructed based on the illumination test conducted on the same test environment and the standard radiation energy meter. The correction coefficient module is used to calculate the correction coefficient based on the test light intensity, the test light temperature and the standard linear relationship. The adjustment module is used to adjust the GAIN value and the OFFSET value of the radiation energy meter to be calibrated according to the correction coefficient.

[0082] The temperature sensor 4 obtains the test light temperature and substitutes it into the standard linear relationship to obtain the standard light intensity corresponding to the test light temperature. Then, the correction coefficient is obtained based on the standard light intensity and the test light intensity displayed by the radiation energy meter 5 to be calibrated. The radiation energy meter can be adjusted by the correction coefficient to obtain a calibrated radiation energy meter.

[0083] In a further embodiment, the black box of this embodiment includes a black base plate 2 and a windshield 3. The black base plate 2 is located directly below the illumination plate 1 and is perpendicular to the light irradiated from the illumination plate 1 to the black base plate 2. The vertical distance between the black base plate 2 and the illumination plate 1 of this embodiment is 1100 mm, which simulates the real lighting environment of the automobile exposure test to the greatest extent; the windshield 3 is arranged around the upper end surface of the black base plate 1 to prevent air flow from interfering with the test.

[0084] In a preferred embodiment, the adjustment module is configured to adjust the GAIN value of the radiometer to be calibrated according to the product of the correction coefficient and the original GAIN value of the radiometer to be calibrated, and to adjust the OFFSET value of the radiometer to be calibrated according to the product of the correction coefficient and the original OFFSET value of the radiometer to be calibrated. The specific calculation formulas are described above.

[0085] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for indirect calibration of a radiation energy meter, characterized by: A light-absorbing black box is placed under the illumination panel; a radiation energy meter to be calibrated is placed in the black box, and multiple temperature sensors are arranged in the black box near the radiation energy meter; the illumination panel is turned on to illuminate the black box according to a set illumination time, and the temperature sensor records the test light temperature and the test light intensity displayed by the radiation energy meter to be calibrated; an illumination test is conducted based on the same test environment and a standard radiation energy meter to establish a standard linear relationship between the standard light intensity and the standard light temperature in the test environment; based on the test light temperature and the standard linear relationship, a standard light intensity corresponding to the test light temperature is obtained; and a correction coefficient is obtained using the standard light intensity and the test light intensity. Adjusting the radiometer to be calibrated based on the correction factor; The method of placing a light-absorbing black box under the illumination board comprises: arranging the black box at a predetermined distance below the illumination board, placing a light-absorbing black base plate at the bottom of the black box, and arranging windshields around the end surface of the black base plate, the windshields being perpendicular to the black base plate and parallel to the light irradiated onto the black base plate by the illumination board; The method of arranging windshields around the end surface of the black bottom plate includes: arranging a vertical plate higher than other windshields on the upstream side of the black bottom plate along the flow field direction; Adjust the light intensity of the lighting board to 600W / m 2 , 800W / m 2 , 1000W / m 2 , 1200W / m 2 Carry out the test for 15 hours at each light intensity, and record the maximum light intensity displayed by the radiation energy meter at this light intensity as the standard light intensity.

2. The indirect calibration method of a radiation energy meter according to claim 1, wherein: The method for adjusting the radiation energy meter to be calibrated based on the correction coefficient includes: adjusting the original GAIN value according to the product of the correction coefficient and the original GAIN value of the radiation energy meter to be calibrated to obtain a corrected GAIN value; adjusting the original OFFSET value according to the product of the correction coefficient and the original OFFSET value of the radiation energy meter to be calibrated to obtain a corrected OFFSET value.

3. The indirect calibration method of a radiation energy meter according to claim 1, wherein: The method for arranging a plurality of temperature sensors in a black box includes: arranging a plurality of temperature sensors at a certain point on the end surface of a black bottom plate at the same time.

4. The indirect calibration method of a radiation energy meter according to claim 1, wherein: The method for obtaining a correction coefficient through standard light intensity and test light intensity includes: taking the ratio of the test light intensity to the standard light intensity as the correction coefficient.

5. The indirect calibration method of a radiation energy meter according to claim 1, wherein: The method for conducting an illumination test based on the same test environment and a standard radiation energy meter to establish a standard linear relationship between standard illumination intensity and standard illumination temperature under the test environment includes: arranging a black box, a temperature sensor, and a standard radiation energy meter under an illumination board according to the same test requirements; turning on the illumination board to illuminate the black box, the temperature sensor recording the standard illumination temperature, and the standard radiation energy meter recording the standard illumination intensity; adjusting the illumination intensity of the illumination board, recording the standard illumination temperature and standard illumination intensity under different illumination intensities, and fitting the standard illumination temperature and standard illumination intensity obtained from the standard test to obtain a standard linear relationship between the standard illumination temperature and the standard illumination intensity.

6. A radiation energy meter indirect calibration device, characterized by: include, Light board; Black box, located below the illumination panel; A temperature measurement module is provided in the black box and is used to measure the test light temperature of the black box under the illumination of the illumination board; Light intensity recording module, used to record the test light intensity displayed by the radiation energy meter to be calibrated in the black box; A standard linear relationship storage module is used to store a standard linear relationship between standard light intensity and standard light temperature in the test environment, which is constructed based on a light test conducted in the same test environment and using a standard radiation energy meter; A correction coefficient module is used to calculate the correction coefficient based on the test light intensity, test light temperature and standard linear relationship; An adjustment module, used for adjusting the GAIN value and OFFSET value of the radiation energy meter to be calibrated according to the correction coefficient; The black box includes, The black base plate is located directly below the illumination plate and is perpendicular to the light from the illumination plate onto the black base plate; Wind shields are installed around the upper end of the black base plate to prevent air flow from interfering with the test.

7. The indirect calibration device for a radiation energy meter according to claim 6, characterized in that: The adjustment module is used to adjust the GAIN value of the radiation energy meter to be calibrated according to the product of the correction coefficient and the original GAIN value of the radiation energy meter to be calibrated, and to adjust the OFFSET value of the radiation energy meter to be calibrated according to the product of the correction coefficient and the original OFFSET value of the radiation energy meter to be calibrated.

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