Infrared channel air calibration method and device for photoelectric equipment

Abstract

The application provides a kind of photoelectric equipment infrared channel air calibration method and equipment.The photoelectric equipment infrared channel air calibration method includes: the hot air balloon as carrier combustion furnace is taken as heat source, the position information of heat source and photoelectric equipment is acquired in real time, the distance between heat source and photoelectric equipment is calculated according to the position information of heat source and photoelectric equipment, the surface temperature information of combustion furnace is collected, the total intensity of heat source infrared radiation is calculated according to the surface temperature information of combustion furnace, the radiant intensity of heat source projected on the receiving surface element of photoelectric equipment is calculated in real time according to the distance between heat source and photoelectric equipment and spectral attenuation, the radiant intensity on the receiving surface element of photoelectric equipment is controlled to reach the radiant intensity threshold range, and the distance between photoelectric equipment and heat source corresponding to the radiant intensity is acquired, when the distance value is in the calibration value range, the calibration of photoelectric equipment is completed.The calibration method in the application has the characteristics of high flexibility, low site requirement and low cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the ship technology field, and in particular, relates to a photoelectric equipment infrared channel air-to-air calibration method and photoelectric equipment infrared channel air-to-air calibration equipment. BACKGROUND

[0002] The shipborne photoelectric equipment is a new type of photoelectric equipment which uses infrared, television and other various photoelectric sensors to replace the traditional optical image transmission system to realize all-day and all-sky fast observation.

[0003] The infrared channel of the photoelectric equipment is designed based on the infrared thermal imaging principle. The thermal radiation of the sea-air target is transmitted through the atmosphere, passes through the infrared protective glass coated with an antireflection film of the photoelectric equipment, is reflected by the infrared reflecting mirror, enters the infrared lens, is focused on the target surface of the infrared sensor, is converted by photoelectric conversion and signal processing, and the infrared sensor sends the standard full television video signal of the target and the background to the image processing module for processing and finally to the display control terminal for display control.

[0004] The infrared channel of the photoelectric equipment adopts a passive mode to receive target heat source information and output target direction, so the photoelectric equipment needs to be calibrated before use. During the sea trial of the photoelectric equipment, the distance calibration of the equipment is required to check whether the distance detection performance of the photoelectric equipment meets the requirements. When the infrared channel of the photoelectric equipment is calibrated, a real target aircraft flies in the air according to a predetermined flight path, or a high-temperature heat source is set up on a high-rise building. The former has high cost, the latter has fire hazards, high requirements for calibration sites and poor mobility. Therefore, a new calibration method needs to be developed. SUMMARY

[0005] The purpose of the embodiments of the present application is to provide a photoelectric equipment infrared channel air-to-air calibration method which has high flexibility, low site requirement and low cost.

[0006] Another purpose of the embodiments of the present application is to provide a calibration equipment using the above calibration method.

[0007] In a first aspect, a photoelectric equipment infrared channel air-to-air calibration method is provided, comprising:

[0008] The ascending combustion furnace as a carrier of a hot air balloon is used as a heat source, position information of the heat source and photoelectric equipment is acquired in real time, the distance between the heat source and the photoelectric equipment is calculated according to the position information of the heat source and the photoelectric equipment, surface temperature information of the combustion furnace is collected, the total intensity of infrared radiation of the heat source is calculated according to the surface temperature information of the combustion furnace, the radiation illuminance of the heat source projected onto the receiving surface element of the photoelectric equipment is calculated in real time according to the distance between the heat source and the photoelectric equipment and spectral attenuation, the radiation illuminance on the receiving surface element of the photoelectric equipment is controlled to reach the threshold range of the radiation illuminance, and the distance between the photoelectric equipment and the heat source corresponding to the radiation illuminance is acquired, and the calibration of the photoelectric equipment is completed when the distance value is within the calibration value range.

[0009] In an embodiment, the real-time acquisition of the position information of the heat source and the photoelectric equipment comprises:

[0010] A first positioning sensor is installed at a predetermined position of the hot air balloon, and the longitude, latitude and elevation information of the hot air balloon is acquired through the first positioning sensor;

[0011] A second positioning sensor is installed at a predetermined position of the photoelectric equipment, and the longitude, latitude and elevation information of the photoelectric equipment is acquired through the second positioning sensor;

[0012] The longitude, latitude and elevation information of the hot air balloon and the longitude, latitude and elevation information of the photoelectric equipment are converted into a space geodetic rectangular coordinate system;

[0013] The longitude, latitude and elevation information of the hot air balloon and the photoelectric equipment in the space geodetic rectangular coordinate system are all converted into polar coordinates with the photoelectric equipment as the center.

[0014] In an embodiment, after the real-time acquisition of the position information of the heat source and the photoelectric equipment, the method further comprises:

[0015] The real distance between the photoelectric equipment and the heat source is acquired;

[0016] The position information data of the heat source and the photoelectric equipment are compared with the real distance, and the distance detection capability of the photoelectric equipment is corrected.

[0017] In an embodiment, the collection of the surface temperature information of the combustion furnace comprises:

[0018] A temperature sensor is fixed on the outer wall of the combustion furnace, the surface temperature of the combustion furnace is collected by using the temperature sensor, and the temperature acquired by the temperature sensor is used as the real-time temperature of the heat source.

[0019] In an embodiment, the real-time calculation of the radiation illuminance of the heat source projected onto the receiving surface element of the photoelectric equipment according to the distance between the heat source and the photoelectric equipment and the spectral attenuation comprises:

[0020]

[0021] R - the range to a standard target under specified weather conditions;

[0022] I - the intensity of the radiation source of the standard target;

[0023] E - the irradiance on the receiving surface element of the optoelectronic device;

[0024] γ - the atmospheric attenuation coefficient under specified weather conditions.

[0025] In one embodiment, the total intensity of the infrared radiation of the heat source is calculated according to the real-time temperature information of the heat source;

[0026] After the real-time temperature of the heat source is obtained, the total intensity of the infrared radiation of the heat source can be calculated according to the Stefan-Boltzmann formula:

[0027]

[0028] ε(λ) - the emissivity of the target spectrum;

[0029] T - the temperature of the target;

[0030] σ - the Stefan-Boltzmann constant;

[0031] S - the effective radiation area of the target.

[0032] In one embodiment, the irradiance on the receiving surface element of the optoelectronic device is controlled to reach the irradiance threshold range, and the distance between the optoelectronic device and the heat source corresponding to the irradiance is obtained, and when the distance value is within the calibration value range, the calibration of the optoelectronic device is completed, including:

[0033] When the irradiance on the receiving surface element of the optoelectronic device is controlled to be equal to the irradiance of the standard target, the theoretical action distance of the optoelectronic device to the heat source is calculated, and the calibration of the infrared channel of the optoelectronic device is completed by comparing the theoretical action distance with the actual action distance.

[0034] In one embodiment, the calculation of the theoretical action distance to the heat source includes:

[0035] The equivalent action distance R0 of the optoelectronic device to the heat source is calculated by using the formula ; wherein,

[0036] R e , R0 - the range to a standard target under specified weather conditions, the equivalent action distance to the heat source;

[0037] I e , I0 - the intensity of the radiation source of the standard target, the intensity of the radiation source of the heat source;

[0038] E - the radiant irradiance projected onto the receiving surface element of the optoelectronic device from the heat source;

[0039] γ e γ0 - atmospheric attenuation coefficient under given meteorological conditions, atmospheric attenuation coefficient at the time of the test.

[0040] According to the second aspect of the present application, a set of optoelectronic device calibration equipment is also provided, comprising:

[0041] a hot air balloon, which is used as a carrier of the heat source when the hot air balloon is in flight;

[0042] a combustion furnace, which is arranged at a predetermined position in the hot air balloon and is used as a heat source;

[0043] a position acquisition device, which is used to acquire position information of the heat source and the optoelectronic device in real time;

[0044] a first calculation module, which is used to calculate a distance between the heat source and the optoelectronic device according to the position information of the heat source and the optoelectronic device;

[0045] a heat source infrared radiation total intensity acquisition module, which is used to collect real-time temperature information of the heat source and calculate a heat source infrared radiation total intensity according to the real-time temperature information of the heat source;

[0046] a second calculation module, which is used to calculate a radiant irradiance projected onto a receiving surface element of the optoelectronic device from the heat source in real time according to the distance between the heat source and the optoelectronic device and spectral attenuation;

[0047] a control module, which is used to control the radiant irradiance on the receiving surface element of the optoelectronic device to reach a threshold range of the radiant irradiance, and acquire a distance between the optoelectronic device and the heat source corresponding to the radiant irradiance, so as to complete calibration of the optoelectronic device when the distance value is within a calibration value range.

[0048] As can be seen from the above scheme, the present application uses a combustion furnace in a hot air balloon as a carrier as a heat source when the hot air balloon is in flight, acquires position information of the heat source and the optoelectronic device in real time and calculates a distance between the heat source and the optoelectronic device. The present application calculates a radiant irradiance projected onto a receiving surface element of the optoelectronic device from the heat source in real time according to the distance between the heat source and the optoelectronic device and spectral attenuation, and when the radiant irradiance on the receiving surface element of the optoelectronic device is within a threshold range, the distance between the optoelectronic device and the heat source acquired is the calibration distance of the optoelectronic device. The volume and energy value of the fuel in the combustion furnace can be accurately controlled, and compared with an airplane flying along a predetermined flight path in the air, the hot air balloon has a small volume and infrared radiation irradiance data is easy to acquire. Therefore, compared with the prior art, the calibration method in the present application has the advantages of higher flexibility, lower site requirement and lower cost. BRIEF DESCRIPTION OF DRAWINGS

[0049] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0050] Figure 1 A flow chart of a method for calibrating an infrared channel of a photoelectric device against the sky according to an embodiment of the present application;

[0051] Figure 2 A schematic diagram of a device for calibrating an infrared channel of a photoelectric device against the sky according to an embodiment of the present application. DETAILED DESCRIPTION

[0052] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will combine the drawings in the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0053] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0054] According to a first aspect of the present application, referring to Figure 1 , a method for calibrating an infrared channel of a photoelectric device against the sky is provided, comprising the following steps:

[0055] S1, using a hot air balloon as a carrier of a heat source; placing a combustion furnace as a heat source at a predetermined position in the hot air balloon.

[0056] In this step, in an implemented solution, the photoelectric device is placed at a predetermined position on a ship, a helium balloon is used as a carrier, and a combustion furnace uses anthracite as a heat source. A DGPS is installed below the hot air balloon and near the photoelectric device to detect the real-time position, and a temperature sensor is installed on the outer wall of the combustion furnace to monitor the real-time temperature of the heat source. After the anthracite in the combustion furnace is ignited, the combustion furnace is suspended below the helium balloon by a steel wire rope and floats up into the air together with the helium balloon as an observation target.

[0057] In an embodiment, the combustion furnace ignites anthracite. The combustion furnace is composed of a furnace body and a furnace cover. The furnace cover is locked with the furnace body by steel wire after the two are fitted together. The furnace cover is covered with small holes to enhance the gas exchange rate inside and outside the furnace body, and to improve the combustion efficiency of anthracite. The thermal value of anthracite is about 2.7*10^6 J / Kg, and the highest temperature during combustion can reach above 550℃. The duration of high-temperature heating of the combustion furnace can be adjusted by adjusting the amount of anthracite and the combustion state.

[0058] Because the density of helium is much lower than that of air, the aluminum film balloon will float upward as a whole after being filled with helium. By slowly releasing the length of the rope, the helium balloon with the heat source can be smoothly lifted, and the height of the helium balloon floating can be controlled. After the helium balloon is lifted, considering that the air flow causes the helium balloon to drift, resulting in changes in the tension of the rope, the tension of the rope and the weight of the ground fixing device should be considered.

[0059] Helium balloon buoyancy calculation:

[0060]

[0061]

[0062] F 浮 >Mg+M1g

[0063] ρ g Air density;

[0064] ρ he Helium density;

[0065] M1 - Helium balloon device weight;

[0066] Z - The height at which the helium balloon is located.

[0067] The helium balloon should be released by tethering with a rope. The rope should be selected to be wear-resistant and not prone to static electricity, and at the same time, considering that there is a heat source nearby, the rope should be partially heat-insulated. Under the maximum wind speed, the maximum tension that the rope can withstand should be greater than the tension that the helium balloon can withstand.

[0068] The helium balloon should be released by tethering with a rope. The rope should be selected to be wear-resistant and not prone to static electricity, and at the same time, considering that there is a heat source nearby, the rope should be partially heat-insulated. Under the maximum wind speed, the maximum tension that the rope can withstand should be greater than the tension that the helium balloon can withstand. The helium balloon is tethered to a fixed object by a rope, and the weight of the fixed object should be greater than 5 times the lifting force of the helium balloon.

[0069] S2, real-time acquisition of the position information of the heat source and the photoelectric device, and calculation of the distance between the heat source and the photoelectric device according to the position information of the heat source and the photoelectric device.

[0070] In this step, in an embodiment, a DGPS is installed near the photoelectric device under the hot air balloon to collect position information and calculate the distance and azimuth value between the heat source and the photoelectric device. The DGPS collects the longitude, latitude and elevation of the target and converts them into distance and azimuth. The geodetic coordinates measured by the DGPS are first converted into space geodetic rectangular coordinates of the target, and then into polar coordinates with the center of the photoelectric device.

[0071] Conversion of the geodetic coordinate system (B, L, h) into space geodetic rectangular coordinates (X, Y, Z):

[0072]

[0073] The radius of the prime vertical curvature of the reference ellipsoid;

[0074] a, b - the major and minor radii of the reference ellipsoid;

[0075] The first eccentricity of the reference ellipsoid.

[0076] Conversion of the space geodetic rectangular coordinate system (X, Y, Z) into the topocentric rectangular coordinate system (x, y, z):

[0077]

[0078] Conversion of the topocentric rectangular coordinate system (x, y, z) into polar coordinates (D, β, ε):

[0079]

[0080]

[0081] Where D is the distance between the heat source and the photoelectric device, and β is the azimuth between the heat source and the photoelectric device.

[0082] After calculating the true distance and azimuth between the heat source and the photoelectric device, the azimuth output error of the photoelectric device can be corrected by comparing the results with the azimuth output of the infrared channel of the photoelectric device.

[0083] S3, collecting real-time temperature information of the heat source, and calculating the total intensity of infrared radiation of the heat source according to the real-time temperature information of the heat source.

[0084] Real-time temperature monitoring of the heat source is performed, a temperature sensor is fixed on the outer wall of the combustion furnace to collect the surface temperature information of the combustion furnace, and the temperature obtained by the temperature sensor is taken as the real-time temperature of the heat source, which is used as a parameter for calculating the total intensity of infrared radiation of the heat source, the intensity of infrared radiation of the heat source in the specified working waveband, and the effective action distance.

[0085] Total intensity of infrared radiation of the heat source I eThe calculation can be made according to the Stefan formula:

[0086]

[0087] ε(λ) - emissivity of the target spectrum;

[0088] T - target temperature;

[0089] σ - Stefan constant;

[0090] S - target effective radiation area.

[0091] S4, calculate the infrared radiation intensity of the heat source in the specified working waveband.

[0092] After the total infrared radiation intensity of the heat source is calculated, the general blackbody radiation curve is used to calculate the percentage of the integral radiation intensity of the working waveband observed by the infrared channel of the photoelectric device in the total radiation intensity at temperature T, so as to obtain the infrared radiation intensity I of the heat source in the specified working waveband. 0Δλ :

[0093] I 0Δλ = ηI e

[0094] η - percentage of integral radiation intensity of the observation waveband in the total radiation intensity.

[0095] S5, control the radiation illuminance on the receiving surface element of the photoelectric device to reach the radiation illuminance threshold range, and obtain the distance between the photoelectric device and the heat source corresponding to the radiation illuminance, and when the distance value is in the calibration value range, the calibration of the photoelectric device is completed.

[0096] The target radiates outward with radiation intensity I at temperature T, and after atmospheric transmission, it is projected onto the receiving surface element of the photoelectric device to obtain radiation illuminance E e , and the atmospheric transmission of radiation is a function of spectral attenuation and distance. Air humidity is collected during the test, and atmospheric attenuation coefficient during the test is calculated according to software simulation.

[0097]

[0098] τ a = e -γ(λ)R

[0099]

[0100]

[0101] R e , R0 - effective distance to the standard target and equivalent distance to the heat source under specified weather conditions;

[0102] Ie I0 - total intensity of the heat source infrared radiation, intensity of the heat source infrared radiation in the working waveband;

[0103] E - radiation irradiance projected onto the receiving surface element of the optoelectronic device;

[0104] γ e γ0 - atmospheric attenuation coefficient under the specified meteorological conditions, atmospheric attenuation coefficient at the time of the test.

[0105] The control module 700 is configured to control the radiation irradiance on the receiving surface element of the optoelectronic device to reach the radiation irradiance threshold range, and obtain the distance between the optoelectronic device and the heat source corresponding to the radiation irradiance, so as to complete the calibration of the optoelectronic device when the distance value is in the calibration value range. e The theoretical action distance of the heat source can be calculated according to the atmospheric attenuation coefficient at the time, and the actual action distance can be compared with the theoretical action distance to determine whether the performance of the optoelectronic device meets the standard.

[0106] According to the second aspect of the present application, an optoelectronic device infrared channel air-to-sky calibration device is also provided. Figure 2 An optoelectronic device infrared channel air-to-sky calibration device is shown in the drawings. Referring to FIG. 1, the optoelectronic device infrared channel air-to-sky calibration device includes a hot air balloon 100, a combustion furnace 200, a position acquisition device 300, a first calculation module 400, a heat source infrared radiation total intensity acquisition module 500, a second calculation module 600, and a control module 700. Figure 2 The hot air balloon 100 serves as a carrier of the heat source when the hot air balloon is in the air. The combustion furnace 200 is arranged at a predetermined position in the hot air balloon 100 and serves as the heat source. The position acquisition device 300 is configured to acquire real-time position information of the heat source and the optoelectronic device 800.

[0107] The first calculation module 400 is configured to calculate the distance between the heat source and the optoelectronic device according to the position information of the heat source and the optoelectronic device.

[0108] The heat source infrared radiation total intensity acquisition module 500 is configured to acquire real-time temperature information of the heat source and calculate the total intensity of the heat source infrared radiation according to the real-time temperature information of the heat source.

[0109] The second calculation module 600 is configured to calculate the radiation irradiance projected onto the receiving surface element of the optoelectronic device from the heat source in real time according to the distance between the heat source and the optoelectronic device and the spectral attenuation.

[0110] The control module 700 is configured to control the radiation irradiance on the receiving surface element of the optoelectronic device to reach the radiation irradiance threshold range, and obtain the distance between the optoelectronic device and the heat source corresponding to the radiation irradiance, so as to complete the calibration of the optoelectronic device when the distance value is in the calibration value range.

[0111]

[0112] ​The application takes a hot air balloon as a carrier of a combustion furnace as a heat source, obtains position information of the heat source and photoelectric equipment in real time, and calculates a distance between the heat source and the photoelectric equipment. According to the distance between the heat source and the photoelectric equipment and spectral attenuation, the radiation irradiance of the heat source projected onto a receiving surface element of the photoelectric equipment is calculated in real time. When the radiation irradiance on the receiving surface element of the photoelectric equipment is in a threshold range, the distance between the photoelectric equipment and the heat source obtained is the calibration distance of the photoelectric equipment. The volume and energy value of fuel in the combustion furnace can be accurately controlled. Compared with an airplane flying along a predetermined flight path in the air, the combustion furnace has a small volume, and infrared radiation irradiance data is easy to obtain. Therefore, compared with the prior art, the calibration method in the application has the advantages of higher flexibility, lower site requirement, and lower cost.

[0113] The above only describes the preferred embodiments of the application and is not intended to limit the application. The application can have various modifications and changes for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A method for calibrating the infrared channel of an optoelectronic device, characterized in that, The method comprises the following steps: using a hot air balloon as a carrier of a heat source; placing a combustion furnace as a heat source at a predetermined position in the hot air balloon; acquiring real-time position information of the heat source and the photoelectric device; calculating a distance between the heat source and the photoelectric device according to the position information of the heat source and the photoelectric device; collecting real-time temperature information of the heat source, and calculating total intensity of infrared radiation of the heat source according to the real-time temperature information of the heat source; calculating, according to the distance between the heat source and the photoelectric device and spectral attenuation, a radiation intensity of the heat source projected onto a receiving surface element of the photoelectric device; controlling the radiation intensity on the receiving surface element of the photoelectric device to reach a radiation intensity threshold range, and acquiring a distance between the photoelectric device and the heat source corresponding to the radiation intensity, and completing calibration of the photoelectric device when the distance value is within a calibration value range.

2. The method according to claim 1, wherein the real-time acquisition of the position information of the heat source and the photoelectric device comprises the following steps: installing a first positioning sensor at a predetermined position of the hot air balloon, and acquiring longitude, latitude and elevation information of the hot air balloon through the first positioning sensor; installing a second positioning sensor at a predetermined position of the photoelectric device, and acquiring longitude, latitude and elevation information of the photoelectric device through the second positioning sensor; converting the longitude, latitude and elevation information of the hot air balloon and the longitude, latitude and elevation information of the photoelectric device into a space geodetic rectangular coordinate system; and converting the longitude, latitude and elevation information of the hot air balloon and the photoelectric device in the space geodetic rectangular coordinate system into polar coordinates with the photoelectric device as the center.

3. The method according to claim 2, wherein after the real-time acquisition of the position information of the heat source and the photoelectric device, the method further comprises the following steps: acquiring a real distance between the photoelectric device and the heat source; and comparing the position information data of the heat source and the photoelectric device with the real distance, and using the comparison result to correct a distance detection capability of the photoelectric device. The collection of the surface temperature information of the combustion furnace comprises the following steps: fixing a temperature sensor on an outer wall of the combustion furnace, collecting a surface temperature of the combustion furnace by using the temperature sensor, and using the temperature acquired by the temperature sensor as the real-time temperature of the heat source.

4. The optoelectronic device infrared channel calibration method of any of claims 1 to 3, wherein, The real-time calculation of the radiation intensity of the heat source projected onto the receiving surface element of the photoelectric device according to the distance between the heat source and the photoelectric device and spectral attenuation comprises the following steps: R is a distance of action on a standard target under a specified meteorological condition; 5. The method of claim 4, wherein, I is a radiation source intensity of the standard target; E is a radiation intensity projected onto the receiving surface element of the photoelectric device; γ(λ) is an atmospheric attenuation coefficient under the specified meteorological condition; ε(λ) is an emissivity of a target spectrum; T is a target temperature; 6. The method of claim 5, wherein: The total intensity of infrared radiation I of the heat source is calculated according to the real-time temperature information of the heat source e ; After the real-time temperature of the heat source is acquired, the total intensity I of the infrared radiation of the heat source e The total intensity I of the infrared radiation of the heat source can be calculated according to the Stefan formula: σ is a Stefan constant; S is an effective radiation area of the target. The control of the radiation intensity on the receiving surface element of the photoelectric device to reach the radiation intensity threshold range, and the acquisition of the distance between the photoelectric device and the heat source corresponding to the radiation intensity, and the completion of the calibration of the photoelectric device when the distance value is within the calibration value range, comprise the following steps: ​ 7. The method of claim 6, wherein, ​ The present application discloses a method for calibrating an infrared channel of a photoelectric device, which comprises the following steps: controlling the radiation intensity projected on a receiving surface element of the photoelectric device to be equal to the radiation intensity of a standard target; calculating a theoretical action distance of the photoelectric device to a heat source and comparing the theoretical action distance with an actual action distance to complete the calibration of the infrared channel of the photoelectric device.

8. The method of claim 7, wherein, The calculating of the theoretical action distance to the heat source comprises: The equivalent action distance R0 of the photoelectric device to the heat source is calculated by the formula wherein, R e R0 - the effective range of the standard target under given meteorological conditions, the equivalent range of the heat source; I e , I0 - standard target radiation source intensity, thermal source radiation source intensity; E0 - the radiation intensity projected on the receiving surface element of the photoelectric device; E e — Radiance of the radiation projected onto the standard target; gamma e , γ0— atmospheric attenuation coefficient under given meteorological conditions, atmospheric attenuation coefficient at the time of testing.

9. An electro-optical device infrared channel over-the-air calibration device, characterized by, The present application further discloses a system for calibrating an infrared channel of a photoelectric device, which comprises the following components: a hot air balloon, which is used as a carrier of the heat source when the hot air balloon is in flight; a combustion furnace, which is arranged at a predetermined position in the hot air balloon and is used as the heat source; a position acquisition device, which is used for acquiring position information of the heat source and the photoelectric device in real time; a first calculation module, which is used for calculating a distance between the heat source and the photoelectric device according to the position information of the heat source and the photoelectric device; a heat source infrared radiation total intensity acquisition module, which is used for collecting real-time temperature information of the heat source and calculating a heat source infrared radiation total intensity according to the real-time temperature information of the heat source; a second calculation module, which is used for calculating the radiation intensity projected on the receiving surface element of the photoelectric device by the heat source in real time according to the distance between the heat source and the photoelectric device and spectral attenuation; a control module, which is used for controlling the radiation intensity on the receiving surface element of the photoelectric device to reach a radiation intensity threshold range, acquiring a distance between the photoelectric device and the heat source corresponding to the radiation intensity, and completing the calibration of the photoelectric device when the distance value is in a calibration value range.

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