Method, system and equipment for testing infrared detection distance of null point source target

Abstract

The invention relates to the technical field of infrared detection testing, and discloses a method, a system and equipment for testing the infrared detection distance of an empty point source target. The method comprises the following steps of: calibrating tested equipment by adopting a black body in an external field test scene to obtain a fitting curve of the temperature and the irradiance of the black body; aligning the tested equipment to a test target in the air for testing to obtain an actual detection distance of the target; analyzing a target background irradiance difference between the test target and the background image based on the fitted curve; calculating a target background radiation intensity difference according to the target background irradiance difference and the target actual detection distance; and equivalently calculating the detection distance of the actual target based on the target background radiation intensity difference and a preset distance calculation formula. The influence of surface temperature, weather conditions and the like is fully considered by adopting the external field test, the method is close to the actual test condition, and the obtained test data is more accurate. In the testing process, recorded data are radiation intensity differences, the method is suitable for different sky background conditions, and the testing method is higher in universality and more convenient.

Description

Technical Field

[0001] The present invention relates to the field of infrared detection testing technology, and in particular to a method, system and equipment for testing the infrared detection distance of an empty point source target. Background Art

[0002] It is generally difficult to test the detection distance of an infrared detection system for aerial targets. For example, it is impossible to create a scene for detecting some real targets. Therefore, an equivalent method is generally used to evaluate the detection distance of an infrared detection system. The existing equivalent methods are generally laboratory tests, such as the use of scalar equivalent scaling and irradiance equivalent verification methods, which specifically include: using a parallel light tube and a small diameter aperture to equalize the real target at a long distance, adjusting the black body temperature behind the aperture to equalize the irradiance of the real target, and then calculating the detection distance of the real target according to the point source target detection distance equation.

[0003] At present, the test of infrared detection distance of empty point source targets generally adopts the laboratory equivalent test method, which mainly includes the following defects:

[0004] 1) The influence of actual atmospheric conditions on the detection distance is not considered. Different humidity, temperature, weather (sunny, rainy, foggy) and other factors have a great influence on the energy transmittance of the detection band and cannot be ignored;

[0005] 2) The effect of actual sky background radiation on detection distance is not considered. Different surface temperatures, different weather conditions, different cloud scenes and other factors have a significant impact on background radiation energy, thus affecting the detection distance, which cannot be ignored. Summary of the invention

[0006] The main purpose of the present invention is to provide a method, system and equipment for testing the infrared detection distance of an empty point source target, aiming to solve the existing technical problems.

[0007] To achieve the above object, the present invention provides a method for testing the infrared detection distance of an empty point source target, comprising:

[0008] In the field test scenario, a black body is used to calibrate the device under test to obtain a fitting curve of black body temperature and irradiance;

[0009] Aim the device under test at a test target in the air to obtain an actual detection distance of the target;

[0010] Analyzing the target-background irradiance difference between the test target and the background image based on the fitting curve;

[0011] Calculating the target background radiation intensity difference according to the target background irradiance difference and the target actual detection distance;

[0012] The detection distance of the actual target is equivalently calculated based on the target background radiation intensity difference and a preset distance calculation formula.

[0013] In some embodiments, the step of calibrating the device under test using a black body in an outdoor test scenario to obtain a fitting curve of black body temperature and irradiance includes:

[0014] In the field test scenario, the infrared imaging parameters of the device under test are fixed;

[0015] Setting the parameters of a black body, placing the black body at a fixed distance, and performing black body calibration on the device under test;

[0016] respectively setting the blackbody temperature based on a preset temperature range, and recording the response value of the device under test;

[0017] Calculate the irradiance of the device under test at the blackbody temperature according to a preset irradiance formula and the fixed distance;

[0018] A fitting curve is obtained by fitting the blackbody temperature, irradiance and response value.

[0019] In some embodiments, calculating the irradiance of the device under test at the blackbody temperature according to the preset irradiance formula and the fixed distance includes:

[0020] The fixed distance is taken as the distance between the black body and the window of the device under test;

[0021] Obtaining the blackbody temperature, blackbody diameter and blackbody emissivity coefficient;

[0022] Obtain the ratio of the blackbody's radiation emittance in the working band to the radiation emittance in the full band and the Stefan-Boltzmann coefficient;

[0023] The irradiance of the device under test is calculated based on the preset radiation intensity difference formula according to the black body temperature, black body diameter, black body emission coefficient, the distance between the black body and the window of the device under test, the ratio of the radiation emittance of the working band to the radiation emittance of the full band, and the Stefan-Boltzmann coefficient.

[0024] In some embodiments, the step of aiming the device under test at a test target in the air to obtain an actual detection distance of the target includes:

[0025] Aim the device under test at a test target in the air;

[0026] Controlling the test target to move away from the device under test until the device under test cannot detect the test target, and recording the current distance;

[0027] The current distance is taken as the actual detection distance of the target.

[0028] In some embodiments, analyzing the target-background irradiance difference between the test target and the background image based on the fitting curve includes:

[0029] Acquire raw video data when the device under test is aimed at a test target in the air;

[0030] Obtaining an average grayscale value of a background image according to the original video data;

[0031] The grayscale difference between the test target and the background image in a critical detection state is analyzed based on the fitting curve to obtain the target-background irradiance difference.

[0032] In some embodiments, the step of calculating the target background radiation intensity difference according to the target background irradiance difference and the target actual detection distance includes:

[0033] Obtaining the pixel area and receiving area of ​​the device under test;

[0034] The target background radiation intensity difference is calculated based on a preset radiation intensity difference formula according to the target background irradiance difference, the pixel area, the receiving area and the actual detection distance of the target.

[0035] In some embodiments, the equivalent calculation of the actual target detection distance based on the target background radiation intensity difference and a preset distance calculation formula includes:

[0036] Based on the detection distance equivalent method, the equivalent relationship between the actual target and the test target is obtained according to the target action distance calculation formula of the radiation intensity;

[0037] Using the equivalent relationship as a preset distance calculation formula;

[0038] The detection distance of the actual target is calculated based on the preset distance calculation formula according to the target background radiation intensity difference of the test target and the actual target parameters.

[0039] In some embodiments, the step of calculating the detection distance of the actual target based on the preset distance calculation formula according to the target background radiation intensity difference of the test target and the actual target parameters includes:

[0040] Real-time collection of atmospheric parameters through atmospheric measurement equipment;

[0041] Calculating the atmospheric transmittance of the actual target according to the atmospheric parameters based on the preset analysis software;

[0042] Obtain the target-background radiation intensity difference of the actual target;

[0043] Calculate the atmospheric transmittance of the test target according to the preset test conditions;

[0044] Atmospheric transmittance of actual target;

[0045] The target background radiation intensity difference of the test target, the target actual detection distance and atmospheric transmittance as well as the target background radiation intensity difference and atmospheric transmittance of the actual target are brought into the preset distance calculation formula to calculate the detection distance of the actual target.

[0046] In addition, to achieve the above purpose, the present invention also proposes a system for testing the infrared detection distance of an air point source target, comprising:

[0047] A blackbody calibration module is used to calibrate the device under test using a blackbody in an outdoor test scenario to obtain a fitting curve of blackbody temperature and irradiance;

[0048] An air test module, used to test the device under test by aiming it at a test target in the air to obtain an actual detection distance of the target;

[0049] An analysis module, used for analyzing the target-background irradiance difference between the test target and the background image based on the fitting curve;

[0050] A radiation intensity difference calculation module, used to calculate the target background radiation intensity difference according to the target background irradiance difference and the target actual detection distance;

[0051] The detection distance equivalent calculation module is used to calculate the detection distance of the actual target based on the target background radiation intensity difference and a preset distance calculation formula.

[0052] In addition, to achieve the above-mentioned purpose, the present invention also proposes an electronic device, which includes: a memory, a processor, and an infrared detection distance test program for air point source targets stored in the memory and runnable on the processor, wherein the infrared detection distance test program for air point source targets is configured to implement the infrared detection distance test method for air point source targets as described above.

[0053] The present invention provides a method for testing the infrared detection distance of an empty point source target, including: using a black body to calibrate the device under test in an outdoor test scene to obtain a fitting curve of the black body temperature and irradiance; aiming the device under test at the test target in the air for testing to obtain the actual detection distance of the target; analyzing the target background irradiance difference between the test target and the background image based on the fitting curve; calculating the target background radiation intensity difference according to the target background irradiance difference and the actual detection distance of the target; equivalently calculating the detection distance of the actual target based on the target background radiation intensity difference and a preset distance calculation formula. The test in the present invention is an outdoor test, which fully considers the influence of surface temperature, weather conditions, etc. on the test. Compared with the traditional laboratory test method, the test method of the present invention is closer to the actual test situation, and the obtained test data is more accurate. In addition, the data recorded in the test process of the present invention is the radiation intensity difference, which is applicable to different sky background conditions. Compared with the traditional method of directly testing the sky background radiation energy, the test method of the present invention is more versatile and more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 A schematic diagram of the structure of an electronic device in a hardware operating environment involved in an embodiment of the present invention;

[0055] Figure 2 It is a flow chart of an embodiment of a method for testing the infrared detection distance of an empty point source target according to the present invention;

[0056] Figure 3 A schematic diagram of the process steps involved in the embodiment of the present invention;

[0057] Figure 4 The present invention is a structural block diagram of an embodiment of an infrared detection distance test system for an empty point source target.

[0058] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0059] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0060] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0061] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0062] Reference Figure 1 , Figure 1 The figure is a schematic diagram of the structure of an electronic device of the hardware operating environment involved in the embodiment of the present invention.

[0063] like Figure 1 As shown, the electronic device may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a wireless fidelity (Wireless-Fidelity, Wi-Fi) interface). The memory 1005 may be a high-speed random access memory (Random Access Memory, RAM memory) or a stable non-volatile memory (Non-Volatile Memory, NVM), such as a disk memory. The memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0064] Those skilled in the art will understand that Figure 1 The structure shown in the figure does not constitute a limitation on the electronic device, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0065] like Figure 1 As shown, the memory 1005 as a storage medium may include an operating system, a network communication module, a user interface module, and an infrared detection distance test program for an air point source target.

[0066] exist Figure 1 In the electronic device shown, the network interface 1004 is mainly used for data communication with a network server; the user interface 1003 is mainly used for data interaction with a user; the processor 1001 and the memory 1005 in the electronic device of the present invention can be set in the electronic device, and the electronic device calls the infrared detection distance test program for air point source targets stored in the memory 1005 through the processor 1001, and executes the infrared detection distance test method for air point source targets provided in an embodiment of the present invention.

[0067] The invention provides a method, system and equipment for testing the infrared detection distance of an empty point source target.

[0068] The embodiment of the present invention provides a method for testing the infrared detection distance of an empty point source target, referring to Figure 2 , Figure 2 The figure is a flow chart of an embodiment of a method for testing infrared detection distance of an empty point source target according to the present invention.

[0069] like Figure 2 As shown, the infrared detection distance test method for an empty point source target includes:

[0070] Step S100: calibrating the device under test using a black body in an outdoor test scene to obtain a fitting curve of black body temperature and irradiance;

[0071] Step S200: aiming the device under test at a test target in the air to obtain an actual detection distance of the target;

[0072] Step S300: analyzing the target-background irradiance difference between the test target and the background image based on the fitting curve;

[0073] Step S400: Calculating the target background radiation intensity difference according to the target background irradiance difference and the target actual detection distance;

[0074] Step S500: Calculate the actual target detection distance based on the target-background radiation intensity difference and a preset distance calculation formula.

[0075] It should be noted that the execution subject in this embodiment may be an electronic device, which may be a computer device with data processing functions, or other devices that can achieve the same or similar functions. This embodiment does not limit this. In this embodiment, a computer device is used as an example for explanation.

[0076] It is understandable that based on the calculation theory of infrared detection distance for air targets, the target action distance calculation formula based on target radiation intensity commonly used in the industry (Formula 1) is:

[0077]

[0078] Where ΔJ represents the difference between the target and background radiation intensity, in W / sr; Indicates the specific detection rate, unit: cm·Hz 1\2 ·W -1 ; A0 represents the receiving area of ​​the optical system, unit: mm 2 ,in, D0 is the entrance pupil diameter of the optical system, f is the focal length, in mm; τ α represents the atmospheric transmittance, which can be calculated using MOTRAN software; τ0 represents the transmittance of the optical system; A represents the signal-to-noise ratio; d It represents the pixel area of ​​the detector, in μm; Δf represents the equivalent noise bandwidth of the system, in Hz, Δf=1 / 2τ d , τ d is the integration time.

[0079] Since background radiation is generally not considered when theoretical calculations or laboratory calibration tests are performed on the target radiation intensity, theoretical calculations and laboratory calibration tests can only obtain the radiation intensity of the target itself. If the background radiation intensity is zero or close to zero (such as the deep space background), the value of ΔJ is only determined by the target radiation intensity. When conducting an equivalent test of the infrared detection distance of an aerial target on the ground, since the background radiation of the ground and the sky cannot be ignored, in addition to the target radiation intensity, the background radiation intensity must also be known to accurately calculate the detection distance. There are many traditional methods for studying the sky background radiation energy, but since the sky radiation energy is strongly related to factors such as time, surface temperature, and weather conditions, the test results under a certain fixed condition cannot be used universally under other conditions, that is, before conducting a detection distance equivalent test, a calibration of the sky background radiation energy must be performed, which is time-consuming and laborious.

[0080] In order to more accurately and conveniently perform infrared detection distance test of aerial point targets, this embodiment proposes a method for testing infrared detection distance of aerial point source targets. This method directly calibrates the radiation difference between the target and the background, which is described below in conjunction with specific steps.

[0081] In one embodiment, a blackbody is used to calibrate a device under test in an outdoor test scenario to obtain a fitting curve of blackbody temperature and irradiance, including: in the outdoor test scenario, fixing infrared imaging parameters of the device under test; setting parameters of the blackbody, and placing the blackbody at a fixed distance to perform blackbody calibration on the device under test; setting blackbody temperatures based on a preset temperature range, and recording response values ​​of the device under test; calculating the irradiance of the device under test at the blackbody temperature according to a preset irradiance formula and the fixed distance; and obtaining a fitting curve by fitting the blackbody temperature, irradiance, and response value.

[0082] In one embodiment, the irradiance of the device under test at the blackbody temperature is calculated according to a preset irradiance formula and the fixed distance, including: taking the fixed distance as the distance between the blackbody and the window of the device under test; obtaining the blackbody temperature, the blackbody diameter, and the blackbody emission coefficient; obtaining the ratio of the blackbody's radiation emittance in the working band to the radiation emittance in the full band, and the Stefan Boltzmann coefficient; and calculating the irradiance of the device under test based on a preset radiation intensity difference formula according to the blackbody temperature, the blackbody diameter, the blackbody emission coefficient, the distance between the blackbody and the window of the device under test, the ratio of the radiation emittance in the working band to the radiation emittance in the full band, and the Stefan Boltzmann coefficient.

[0083] Specifically, blackbody calibration target-background radiation difference calibration: Use the device under test and the blackbody to calibrate the relationship between the irradiance of the device under test and the grayscale value of the device. When using the blackbody calibration, the irradiance of the device under test can be calculated according to the following formula (Formula 2):

[0084]

[0085] Where E represents the irradiance of the device under test, unit: W / cm 2 ; B represents the ratio of the radiation emittance in the working band to the radiation emittance in the full band; D represents the diameter of the black body, in m; T represents the temperature of the black body, in K; represents the Stefan-Boltzmann coefficient: 5.67×10 -12 W / (cm 2 ·K 4 ), ε represents the blackbody emission coefficient, and L represents the distance between the blackbody and the window of the device under test, in meters.

[0086] Specifically, a black body at 0°C to 50°C is used to calibrate the device under test, the infrared imaging parameters of the device under test are kept consistent, the average grayscale value at different blackbody temperatures is obtained, and the grayscale value change curve (fitting curve) corresponding to the irradiance change is fitted.

[0087] For example, Figure 3As shown, fix the non-uniformity data of the device under test, that is, keep the infrared imaging parameters of the device under test consistent to prevent it from automatically switching according to the scene; set parameters such as the blackbody emissivity, place the blackbody at a fixed distance, and accurately measure the fixed distance (that is, the distance L between the blackbody and the window of the device under test); set the blackbody temperature to 0℃~50℃ respectively, and record the response value of the device under test. It should be noted that when the blackbody is set to multiple different temperature points, the device under test (such as an infrared detection system) records the grayscale value of the blackbody image at different temperature points in the pixel. Here, the response value is the average grayscale value at different blackbody temperatures. Calculate the irradiance E of the device under test at different blackbody temperatures according to the above formula 2; fit the blackbody temperature and irradiance to obtain a fitting curve.

[0088] In one embodiment, the device under test is aimed at a test target in the air for testing to obtain an actual detection distance of the target, including: aiming the device under test at the test target in the air; controlling the test target to move away from the device under test until the device under test cannot detect the test target, and recording the current distance; and using the current distance as the actual detection distance of the target.

[0089] In one embodiment, the target-background irradiance difference between the test target and the background image is analyzed based on the fitting curve, including: obtaining original video data when the device under test is aimed at the test target in the air; obtaining an average grayscale value of the background image based on the original video data; and obtaining a target-background irradiance difference by analyzing the grayscale difference between the test target and the background image in a critical detection state based on the fitting curve.

[0090] It can be understood that the cloudless sky background image is collected to obtain the average grayscale value, which is compared with the blackbody grayscale value to obtain the blackbody temperature segment corresponding to the background image. It is known that when a target is detected, the grayscale difference between the target and the background is fixed. By using the irradiance change and grayscale value change curve (i.e., the fitting curve) of the corresponding blackbody temperature segment, the irradiance change corresponding to the grayscale difference between the target and the background (i.e., the target-background irradiance difference ΔE) can be obtained. The target-background radiation intensity difference can be calculated from the target-background irradiance difference. Since the radiation intensity is a point target characteristic, the energy radiated from all directions of the sky background to a single pixel point can be equivalent to the radiation of a point target in the target orientation, thereby inferring the radiation intensity difference between the target and the background.

[0091] For example, Figure 3 As shown, aim the device at the aerial test target, record the original video data, and control the test target to move away until the algorithm cannot detect the target. Record the distance between the target and the device under test at this time (i.e. the actual detection distance L of the target). 目标); the grayscale difference between the target and the surrounding image is analyzed by using the fitting curve when the target is close to the critical detection state, so as to obtain the irradiance difference between the target and the background in the critical detection state (i.e., the target-background irradiance difference ΔE).

[0092] In one embodiment, the target background radiation intensity difference is calculated according to the target background irradiance difference and the target actual detection distance, including: obtaining the pixel area and receiving area of ​​the device under test; and calculating the target background radiation intensity difference according to the target background irradiance difference, pixel area, receiving area and the target actual detection distance based on a preset radiation intensity difference formula.

[0093] Specifically, the radiation intensity difference between the target and the background can be calculated according to the following formula (Formula 3):

[0094]

[0095] Where ΔJ represents the target-background radiation intensity difference, unit: W / Sr; ΔE represents the irradiance difference between the target and background radiation received by the device under test (i.e., the target-background irradiance difference), unit: W / cm 2 ; A d Indicates the pixel area of ​​the device under test, in cm 2 ; L 目标 Indicates the actual detection distance of the target, in m; A b Indicates the receiving area of ​​the device under test, in m 2 .

[0096] In one embodiment, the detection distance of the actual target is equivalently calculated based on the target-background radiation intensity difference and a preset distance calculation formula, including: obtaining an equivalent relationship between the actual target and the test target according to the target action distance calculation formula of the radiation intensity based on the detection distance equivalent method; using the equivalent relationship as the preset distance calculation formula; and calculating the detection distance of the actual target according to the target-background radiation intensity difference of the test target and the actual target parameters based on the preset distance calculation formula.

[0097] In one embodiment, the detection distance of the actual target is calculated based on the target background radiation intensity difference of the test target and the actual target parameters based on the preset distance calculation formula, including: collecting atmospheric parameters in real time through atmospheric measurement equipment; calculating the atmospheric transmittance of the actual target based on the atmospheric parameters based on preset analysis software; obtaining the target background radiation intensity difference of the actual target; calculating the atmospheric transmittance of the test target according to preset test conditions; the atmospheric transmittance of the actual target; bringing the target background radiation intensity difference of the test target, the actual detection distance of the target and the atmospheric transmittance as well as the target background radiation intensity difference and the atmospheric transmittance of the actual target into the preset distance calculation formula to calculate the detection distance of the actual target.

[0098] It should be noted that the detection distance is equivalent: the target action distance calculation formula based on radiation intensity is shown in the above formula 1. For the same infrared detection equipment, the distance formula based on radiation intensity is different except for the radiation intensity difference ΔJ and the atmospheric transmittance τ. α Except for the target action distance R based on the radiation intensity, other parameters are the same. Therefore, in this embodiment, the detection distance test is carried out in an equivalent manner.

[0099] Specifically, the actual target detection distance is calculated according to Formula 4: By testing the target equivalent actual target detection distance, according to Formula 1, there is the following equivalent relationship (Formula 4):

[0100]

[0101] Among them, J 测试目标 is the target-background radiation intensity difference calculated by the above formula 3; R 测试目标 The actual detection distance L of the above target 目标 ; J 实际目标 is the target-background radiation intensity difference of the known third-party detection result; τ α测试目标 It is the atmospheric transmittance calculated by MODTRAN software according to the pre-specified test conditions. Here, during the test, the atmospheric parameters are collected in real time by atmospheric measurement equipment, and the atmospheric transmittance τ is calculated by MODTRAN software. α实际目标 When the relevant parameters and test conditions of the actual target are known, the detection distance of the actual target can be calculated according to the above formula 4 to obtain the actual target detection distance R 实际目标 .

[0102] The method described in this embodiment can directly calibrate the target and background radiation difference. This method is not affected by sky background conditions, atmospheric conditions, etc., and can accurately obtain the detection distance of the actual target under the current test conditions. The test in this embodiment is an outdoor test, which fully considers the influence of surface temperature, weather conditions, etc. Compared with the existing laboratory test, it is closer to the actual test, and the obtained test data is more accurate; the data recorded in the test process of this embodiment is the radiation intensity difference, which is applicable to different sky background conditions. Compared with the existing method of directly testing the sky background radiation energy, it is more versatile and more convenient.

[0103] The present embodiment provides a method for testing the infrared detection distance of an empty point source target, including: using a black body to calibrate the device under test in an outdoor test scene to obtain a fitting curve of black body temperature and irradiance; aiming the device under test at the test target in the air for testing to obtain the actual detection distance of the target; analyzing the target background irradiance difference between the test target and the background image based on the fitting curve; calculating the target background radiation intensity difference according to the target background irradiance difference and the actual detection distance of the target; and equivalently calculating the detection distance of the actual target based on the target background radiation intensity difference and a preset distance calculation formula. The test in the present embodiment is an outdoor test, which fully considers the influence of surface temperature, weather conditions, etc. on the test. Compared with the traditional laboratory test method, the test method described in the present embodiment is closer to the actual test situation, and the obtained test data is more accurate. In addition, the data recorded in the test process of the present embodiment is the radiation intensity difference, which is applicable to different sky background conditions. Compared with the traditional method of directly testing the sky background radiation energy, the test method described in the present embodiment is more versatile and more convenient.

[0104] In addition, an embodiment of the present invention further proposes a storage medium, on which is stored a program for testing the infrared detection distance of an aerial point source target. When the program for testing the infrared detection distance of an aerial point source target is executed by a processor, the steps of the method for testing the infrared detection distance of an aerial point source target as described above are implemented.

[0105] Reference Figure 4 , Figure 4 The present invention is a structural block diagram of an embodiment of an infrared detection distance test system for an empty point source target.

[0106] like Figure 4 As shown, the infrared detection distance test system for air point source targets includes:

[0107] A blackbody calibration module 10 is used to calibrate the device under test using a blackbody in an outdoor test scenario to obtain a fitting curve of blackbody temperature and irradiance;

[0108] An air test module 20 is used to test the device under test by aiming it at a test target in the air to obtain an actual detection distance of the target;

[0109] An analysis module 30, configured to analyze the target-background irradiance difference between the test target and the background image based on the fitting curve;

[0110] A radiation intensity difference calculation module 40 is used to calculate the target background radiation intensity difference according to the target background irradiance difference and the target actual detection distance;

[0111] The detection distance equivalent calculation module 50 is used to equivalently calculate the actual target detection distance based on the target background radiation intensity difference and a preset distance calculation formula.

[0112] This embodiment provides a system for testing the infrared detection distance of an empty point source target. The test performed by the system is an outdoor test, which fully considers the influence of surface temperature, weather conditions, etc. on the test. Compared with the traditional laboratory test method, the test method described in this embodiment is closer to the actual test situation, and the test data obtained is more accurate. In addition, the data recorded in the test process of this embodiment is the radiation intensity difference, which is applicable to different sky background conditions. Compared with the traditional method of directly testing the sky background radiation energy, the test method described in this embodiment is more versatile and more convenient.

[0113] It should be noted that the technical details that are not described in detail in the embodiment of the infrared detection distance test system for point-to-air source targets can be found in the infrared detection distance test method for point-to-air source targets described above provided in any embodiment of the present invention, and will not be repeated here.

[0114] It should be understood that the above is only an example and does not constitute any limitation on the technical solution of the present invention. In specific applications, technicians in this field can make settings as needed, and the present invention does not limit this.

[0115] It should be noted that the workflow described above is merely illustrative and does not limit the scope of protection of the present invention. In practical applications, technicians in this field can select part or all of them according to actual needs to achieve the purpose of the present embodiment, and no limitation is made here.

[0116] In addition, it should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or system including the element.

[0117] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0118] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as a read-only memory (ROM) / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0119] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for testing the infrared detection distance of an air point source target, characterized in that: include: In the field test scenario, a black body is used to calibrate the device under test to obtain a fitting curve of black body temperature and irradiance; Aim the device under test at a test target in the air to obtain an actual detection distance of the target; Analyzing the target-background irradiance difference between the test target and the background image based on the fitting curve; Calculating the target background radiation intensity difference according to the target background irradiance difference and the target actual detection distance; The detection distance of the actual target is equivalently calculated based on the target background radiation intensity difference and a preset distance calculation formula.

2. The method according to claim 1, characterized in that The method of calibrating the device under test by using a black body in an outdoor test scenario to obtain a fitting curve of black body temperature and irradiance includes: In the field test scenario, the infrared imaging parameters of the device under test are fixed; Setting the parameters of a black body, placing the black body at a fixed distance, and performing black body calibration on the device under test; respectively setting the blackbody temperature based on a preset temperature range, and recording the response value of the device under test; Calculate the irradiance of the device under test at the blackbody temperature according to a preset irradiance formula and the fixed distance; A fitting curve is obtained by fitting the blackbody temperature, irradiance and response value.

3. The method according to claim 2, characterized in that The step of calculating the irradiance of the device under test at the blackbody temperature according to the preset irradiance formula and the fixed distance includes: The fixed distance is taken as the distance between the black body and the window of the device under test; Obtaining the blackbody temperature, blackbody diameter and blackbody emissivity coefficient; Obtain the ratio of the blackbody's radiation emittance in the working band to the radiation emittance in the full band and the Stefan-Boltzmann coefficient; The irradiance of the device under test is calculated based on the preset radiation intensity difference formula according to the black body temperature, black body diameter, black body emission coefficient, the distance between the black body and the window of the device under test, the ratio of the radiation emittance of the working band to the radiation emittance of the full band, and the Stefan-Boltzmann coefficient.

4. The method according to claim 1, characterized in that The step of aiming the device under test at a test target in the air to obtain an actual detection distance of the target includes: Aim the device under test at a test target in the air; Controlling the test target to move away from the device under test until the device under test cannot detect the test target, and recording the current distance; The current distance is taken as the actual detection distance of the target.

5. The method according to claim 1, characterized in that The analyzing the target-background irradiance difference between the test target and the background image based on the fitting curve includes: Acquire raw video data when the device under test is aimed at a test target in the air; Obtaining an average grayscale value of a background image according to the original video data; The grayscale difference between the test target and the background image in a critical detection state is analyzed based on the fitting curve to obtain the target-background irradiance difference.

6. The method according to claim 1, characterized in that The step of calculating the target background radiation intensity difference according to the target background irradiance difference and the target actual detection distance includes: Obtaining the pixel area and receiving area of ​​the device under test; The target background radiation intensity difference is calculated based on a preset radiation intensity difference formula according to the target background irradiance difference, the pixel area, the receiving area and the actual detection distance of the target.

7. The method according to any one of claims 1 to 6, characterized in that The equivalent calculation of the detection distance of the actual target based on the target background radiation intensity difference and a preset distance calculation formula includes: Based on the detection distance equivalent method, the equivalent relationship between the actual target and the test target is obtained according to the target action distance calculation formula of the radiation intensity; Using the equivalent relationship as a preset distance calculation formula; The detection distance of the actual target is calculated based on the preset distance calculation formula according to the target background radiation intensity difference of the test target and the actual target parameters.

8. The method according to claim 7, characterized in that The method of calculating the detection distance of the actual target based on the preset distance calculation formula according to the target background radiation intensity difference of the test target and the actual target parameters includes: Real-time collection of atmospheric parameters through atmospheric measurement equipment; Calculating the atmospheric transmittance of the actual target according to the atmospheric parameters based on the preset analysis software; Obtain the target-background radiation intensity difference of the actual target; Calculate the atmospheric transmittance of the test target according to the preset test conditions; Atmospheric transmittance of actual target; The target background radiation intensity difference of the test target, the target actual detection distance and atmospheric transmittance as well as the target background radiation intensity difference and atmospheric transmittance of the actual target are brought into the preset distance calculation formula to calculate the detection distance of the actual target.

9. An infrared detection distance test system for an air point source target, characterized in that: include: A blackbody calibration module is used to calibrate the device under test using a blackbody in an outdoor test scenario to obtain a fitting curve of blackbody temperature and irradiance; An air test module, used to test the device under test by aiming it at a test target in the air to obtain an actual detection distance of the target; An analysis module, used for analyzing the target-background irradiance difference between the test target and the background image based on the fitting curve; A radiation intensity difference calculation module, used to calculate the target background radiation intensity difference according to the target background irradiance difference and the target actual detection distance; The detection distance equivalent calculation module is used to calculate the detection distance of the actual target based on the target background radiation intensity difference and a preset distance calculation formula.

10. An electronic device, characterized in that: The electronic device includes: a memory, a processor, and an infrared detection distance test program for air point source targets stored in the memory and executable on the processor, wherein the infrared detection distance test program for air point source targets is configured to implement an infrared detection distance test method for air point source targets as described in any one of claims 1 to 8.

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