Typical photoelectric equipment dynamic performance description method and system based on atmospheric environment sensitivity analysis

Abstract

The invention provides a typical photoelectric equipment dynamic performance description method and system based on atmospheric environment sensitivity analysis, and belongs to the technical field of photoelectric imaging, the photoelectric equipment dynamic performance description method comprises the following steps: S1, according to environmental elements, constructing an action distance influence model of the environmental elements on photoelectric equipment; step S2, utilizing an air-ground synchronous acquisition test result to correct the model of influence of the environmental factors on the acting distance; and S3, determining the sensitivity value of the influence of each environmental element on the action distance by adopting the corrected model of the influence of the environmental elements on the action distance so as to determine key elements in the environmental elements. According to the method, key environmental factors influencing the dynamic performance of the photoelectric weapon can be found out, accurate evaluation of the dynamic performance of the photoelectric equipment under different environmental conditions is facilitated, and the operational effectiveness of the photoelectric equipment can be exerted to the maximum extent.

Description

Technical Field

[0001] The present invention belongs to the field of optoelectronic imaging technology, and in particular relates to a method and system for describing the dynamic performance of typical optoelectronic equipment based on atmospheric environment sensitivity analysis. Background Art

[0002] The existing description of airborne optoelectronic weapon performance mainly refers to the relevant conclusions of test appraisal, and most of these conclusions are discrete indicators. At present, no relevant research has been carried out to effectively describe the characteristics of equipment performance evolving with environmental conditions. This static description method of equipment performance seriously affects the accuracy of equipment performance evaluation under different battlefield environmental conditions, thereby limiting the maximum performance of its combat effectiveness. Summary of the invention

[0003] One of the purposes of the present invention is to provide a method for describing the dynamic performance of typical optoelectronic equipment based on atmospheric environmental sensitivity analysis. This method can identify the key environmental factors that affect the dynamic performance of optoelectronic weapons, is conducive to the accurate evaluation of the dynamic performance of optoelectronic equipment under different environmental conditions, and can maximize the combat effectiveness of optoelectronic equipment.

[0004] A second object of the present invention is to provide a typical optoelectronic equipment dynamic performance description system based on atmospheric environment sensitivity analysis.

[0005] In order to achieve one of the above purposes, the present invention adopts the following technical solution:

[0006] A typical optoelectronic equipment dynamic performance description method based on atmospheric environment sensitivity analysis, the optoelectronic equipment dynamic performance description method comprising:

[0007] Step S1, constructing a model of the influence of environmental factors on the distance of optoelectronic equipment according to environmental factors;

[0008] Step S2, using the air-ground synchronous collection test results to calibrate the model of the impact of the environmental factors on the action distance;

[0009] Step S3: using the corrected environmental factor influence model on the action distance, determining the sensitivity value of each environmental factor on the action distance, so as to determine the key factor among the environmental factors.

[0010] Further, in the step S1, the environmental factors include meteorological environmental factors, target characteristic factors considering key dimensions and target background inherent temperature difference;

[0011] The meteorological environmental elements include atmospheric temperature, humidity and visibility;

[0012] The target characteristic factor takes into account key dimensions including target spatial frequency, target image critical dimension and target line pair number of the target image in the direction of the target image critical dimension.

[0013] Furthermore, in step S1, the specific process of constructing the model of the influence of environmental factors on the action distance of optoelectronic equipment includes:

[0014] Step S11, dividing the target detected by the optoelectronic equipment into perception levels to determine the critical size of the target image of the optoelectronic equipment at each perception level and the number of target line pairs of the target image in the direction of the critical size of the target image;

[0015] Step S12, according to the target spatial frequency under different meteorological conditions, the target image critical size of the optoelectronic equipment at each perception level and the number of target line pairs of the target image in the direction of the target image critical size, the target detection and recognition distance under different meteorological conditions is solved to establish a first mathematical model that considers the influence of the critical size on the effective distance of the optoelectronic equipment at each perception level by the target characteristic factor;

[0016] Step S13: using a radiation transmission model, mapping the dynamic changes of meteorological environmental elements into changes in atmospheric extinction coefficients to form a second mathematical model of the impact of meteorological environmental elements on the range of action of optoelectronic equipment;

[0017] Step S14: using the first mathematical model and the second mathematical model, a model of the influence of environmental factors on the action distance of optoelectronic equipment is formed.

[0018] Furthermore, in step S2, the specific process of the correction includes:

[0019] Step S21, according to the key dimensions considered by the target characteristic factors in the air-to-ground synchronization test, the first mathematical model is used to calculate the first action distance of the optoelectronic equipment at each perception level by considering the key dimensions of the target characteristic factors in the air-to-ground synchronization test;

[0020] Step S22, calculating a second action distance of the meteorological environment elements in the air-to-ground synchronous test on the optoelectronic equipment by using the second mathematical model according to the meteorological environment elements in the air-to-ground synchronous test;

[0021] Step S23, using the images acquired by the airborne sensor in the air-to-ground synchronous test, determining the first action distance measurement value of the key dimensions of the target characteristic factors in the air-to-ground synchronous test for the optoelectronic equipment at each perception level and the second action distance measurement value of the meteorological environment factors in the air-to-ground synchronous test for the optoelectronic equipment;

[0022] Step S24, comparing the first action distance measurement value and the second action distance measurement value and the first action distance calculation value and the second action distance calculation value;

[0023] Step S25: modify the first mathematical model and the second data model according to the comparison result.

[0024] Furthermore, in step S3, the specific process of determining the sensitivity value of each environmental factor affecting the action distance includes:

[0025] Step S31, selecting one environmental factor from the environmental factors as a variable parameter, and taking the remaining environmental factors as fixed parameters;

[0026] Step S32, using the corrected environmental factor effect model on the action distance, calculating the change amplitude of each variable parameter on the action distance effect prediction result before and after the disturbance processing;

[0027] Wherein, the variation amplitude value is a sensitivity value;

[0028] Step S33: sort the sensitivity values ​​of all variable parameters on the prediction results of the action distance to determine the key factors.

[0029] In order to achieve the second objective above, the present invention adopts the following technical solution:

[0030] A typical optoelectronic equipment dynamic performance description system based on atmospheric environment sensitivity analysis, the optoelectronic equipment dynamic performance description system comprising:

[0031] A construction module is used to construct a model of the influence of environmental factors on the action distance of optoelectronic equipment according to environmental factors;

[0032] A correction module, used to correct the model of the influence of the environmental factors on the action distance by using the air-ground synchronous collection test results;

[0033] The determination module is used to use the corrected environmental factor impact model on the action distance to determine the sensitivity value of each environmental factor on the action distance, so as to determine the key factors among the environmental factors.

[0034] Furthermore, the building blocks include:

[0035] A division submodule is used to divide the target detected by the optoelectronic equipment into perception levels to determine the critical size of the target image of the optoelectronic equipment at each perception level and the number of target line pairs of the target image in the direction of the critical size of the target image;

[0036] The first determination submodule is used to solve the target detection and recognition distance under different meteorological conditions according to the target spatial frequency under different meteorological conditions, the target image critical size of the optoelectronic equipment at each perception level and the number of target line pairs of the target image in the direction of the target image critical size, so as to establish a first mathematical model that considers the influence of the target characteristic factor on the effective distance of the optoelectronic equipment at each perception level;

[0037] A mapping submodule, used to map the dynamic changes of meteorological environmental elements into changes of atmospheric extinction coefficient using a radiation transfer model, so as to form a second mathematical model of the influence of meteorological environmental elements on the action distance of optoelectronic equipment;

[0038] A submodule is formed, which is used to form a model of the influence of environmental factors on the action distance of optoelectronic equipment by using the first mathematical model and the second mathematical model.

[0039] Furthermore, the correction module includes:

[0040] A first calculation submodule is used to calculate the first action distance of the optoelectronic equipment at each perception level by using the first mathematical model based on the key dimensions of the target characteristic factors in the air-to-ground synchronization test;

[0041] A second calculation submodule is used to calculate a second action distance of the meteorological environment elements in the air-to-ground synchronous test on the optoelectronic equipment using the second mathematical model according to the meteorological environment elements in the air-to-ground synchronous test;

[0042] The second determination submodule is used to determine the first effective distance measurement value of the optoelectronic equipment at each perception level considering the key dimensions of the target characteristic factors in the air-to-ground synchronous test and the second effective distance measurement value of the optoelectronic equipment by the meteorological environment factors in the air-to-ground synchronous test by using the images obtained by the airborne sensor in the air-to-ground synchronous test;

[0043] A comparison submodule, configured to compare the first action distance measurement value and the second action distance measurement value and the first action distance calculation value and the second action distance calculation value;

[0044] The modification submodule is used to modify the first mathematical model and the second data model according to the comparison result.

[0045] Furthermore, the determination module includes:

[0046] A selection submodule is used to select one environmental factor from the environmental factors as a variable parameter and use the remaining environmental factors as fixed parameters;

[0047] The calculation submodule is used to use the corrected environmental factor impact model on the action distance to calculate the change amplitude value of each variable parameter on the action distance impact prediction result before and after the disturbance treatment;

[0048] Wherein, the variation amplitude value is a sensitivity value;

[0049] The sorting submodule is used to sort the sensitivity values ​​of all variable parameters on the prediction results of the action distance to determine the key factors.

[0050] In summary, the technical solution of the present invention has the following technical effects:

[0051] The present invention uses the corrected environmental factor influence model on the action distance of optoelectronic equipment to find out the key environmental factors that affect the dynamic performance of optoelectronic weapons, depicts the envelope curve of the dynamic performance of optoelectronic equipment changing with environmental conditions, and expands the traditional static equipment performance description method to a larger range of dynamic environmental conditions, providing equipment users with a simple and direct equipment performance environmental impact assessment method and tool, thereby achieving accurate assessment of the dynamic performance of optoelectronic equipment under different environmental conditions and maximizing the combat effectiveness of optoelectronic equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0053] Figure 1 The figure is a flow chart of a method for describing the dynamic performance of typical optoelectronic equipment based on atmospheric environment sensitivity analysis according to the present invention.

[0054] Figure 2 This is a typical target detection and recognition distance prediction result curve (5K temperature difference);

[0055] Figure 3 This is a schematic diagram of the air-ground synchronization verification results of the change of the action distance under different environmental influences;

[0056] Figure 4 This is a schematic diagram of typical analysis results of the effect distance changing with atmospheric temperature and humidity;

[0057] Figure 5 This is a schematic diagram of the ranking results of the sensitivity of the medium wave system's operating distance to various parameters. DETAILED DESCRIPTION

[0058] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings 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 making creative work are within the scope of protection of the present invention.

[0059] This embodiment provides a typical optoelectronic equipment dynamic performance description method based on atmospheric environment sensitivity analysis. Figure 1 , the method for describing the dynamic performance of optoelectronic equipment includes:

[0060] Step S1: construct a model of the influence of environmental factors on the distance of optoelectronic equipment according to environmental factors.

[0061] The effective range is the most typical target acquisition performance content. The core of effective range estimation is to solve the minimum resolvable temperature difference MRTD curve of the detection system and the intersection distance of MRTD and the target-background temperature difference attenuation line.

[0062] According to the field of view angle, number of pixels and other parameters of the photoelectric sensor, the spatial frequency of a target of a specific size at a certain distance is calculated. That is, the relationship between the target spatial frequency f and the effective distance L is:

[0063]

[0064] Among them, f is the target spatial frequency; L is the effective distance of the optoelectronic equipment at each perception level; N is the number of target line pairs of the target image in the critical size direction of each perception level (that is, the number of target line pairs required to perform different tasks), the unit is lp; φ is the target angle obtained by object height / object distance, the unit is mrad; H is the critical size of the target image.

[0065] For a standard Johnson stripe of 5m×5m, H=5m, then:

[0066]

[0067] If the detection target is the stripe itself, the critical size should be the size of adjacent black and white stripes (one period), and the relationship between the target spatial frequency and the working distance of the optoelectronic equipment at each perception level is:

[0068] f=0.7·N·L.

[0069] The perception of the target can be divided into three levels: "detection (discovery)", "recognition" and "identification", see Table 1:

[0070] Table 1 Division of three levels of target perception

[0071]

[0072]

[0073] According to the above criteria and judgments, the corresponding detection / discovery, recognition and identification ranges can be obtained, completing the photoelectric sensor range modeling process.

[0074] Therefore, the minimum resolvable temperature difference curve and the target-background temperature difference curve must be determined first, referring to Figure 2 The target-background temperature difference curve is also called the "atmospheric load line", which is the core indicator of the degree of atmospheric attenuation of the target background signal under given environmental conditions. The slope of the atmospheric load line is the extinction coefficient σ, and the unit is usually 1 / km, which represents the atmospheric attenuation level per unit distance. The relationship between the atmospheric extinction coefficient σ and the transmittance T can be expressed by the Beer-Lambert law (i.e. the second mathematical model) as follows:

[0075] T = exp(-σ·L);

[0076] Among them, T is the transmittance; σ is the atmospheric extinction coefficient. The atmospheric extinction coefficient is affected by atmospheric temperature, humidity, aerosol optical properties and visibility. Atmospheric humidity determines the influence of water vapor transmittance, and atmospheric temperature determines the level of infrared radiation signal on the observation path; aerosol optical properties can describe the extinction and scattering characteristics of the scattering medium at different wavelengths, while visibility adjusts the concentration of the scattering medium. The means of radiation transfer modeling can be used to map the dynamic changes of meteorological conditions to changes in the atmospheric extinction coefficient σ. That is, in the radiation transfer model, parameters such as atmospheric temperature and humidity profiles, aerosol types and visibility are set, the atmospheric transmittance between the aircraft and the target is calculated, and then σ is solved through the Beer-Lambert law to realize the linkage between meteorological parameters and the slope of the atmospheric load line.

[0077] The environmental factors in this embodiment include meteorological environmental factors, target characteristic factors considering key dimensions and target background inherent temperature difference. Meteorological environmental factors include atmospheric temperature, humidity and visibility. Target characteristic factors considering key dimensions include target image critical dimensions and the number of target line pairs of the target image in the direction of the target image critical dimensions.

[0078] In summary, the specific process of constructing the model of the influence of environmental factors on the action distance of optoelectronic equipment in this embodiment includes:

[0079] Step S11, dividing the target detected by the optoelectronic equipment into perception levels to determine the critical size of the target image of the optoelectronic equipment at each perception level and the number of target line pairs of the target image in the direction of the critical size of the target image;

[0080] The perception levels in this embodiment include target detection (ie, detection / discovery), target recognition, and target identification.

[0081] Step S12, according to the target spatial frequency under different meteorological conditions, the critical size of the target image of the optoelectronic equipment at each perception level and the number of target line pairs of the target image in the direction of the critical size of the target image, solve the target detection and recognition distance under different meteorological conditions, so as to establish a first mathematical model that considers the influence of the key size of the target characteristic factors on the effective distance of the optoelectronic equipment at each perception level.

[0082] The target characteristic factor in this embodiment considers the impact model (first mathematical model) of the key size on the working distance of the optoelectronic equipment at each perception level as follows:

[0083]

[0084] Among them, f is the target spatial frequency; L is the target action distance of the optoelectronic equipment at each perception level; N is the number of target line pairs of the target image in the critical size direction at each perception level; H is the critical size of the target image.

[0085] Step S13: using the radiation transfer model, the dynamic changes of the meteorological environment elements are mapped into changes in the atmospheric extinction coefficient to form a second mathematical model of the impact of the meteorological environment elements on the action distance of the optoelectronic equipment.

[0086] The second mathematical model of this embodiment is:

[0087] T = exp(-σ·L);

[0088] Where, T is the transmittance; σ is the atmospheric extinction coefficient.

[0089] Step S14: using the first mathematical model and the second mathematical model, a model of the influence of environmental factors on the action distance of optoelectronic equipment is formed.

[0090] Step S2: using the air-ground synchronous collection test results, calibrate the model of the impact of the environmental factors on the action distance.

[0091] The method of air-ground synchronous acquisition and module comparison verification is adopted to verify the change of the action distance under different environmental influences. The verification scheme is referenced Figure 3 .

[0092] First, collect the close-range temperature difference and contrast of the ground cooperation target as the intercept of the atmospheric load line;

[0093] Secondly, atmospheric state monitoring equipment such as solar radiometers and lidars are used to synchronously collect atmospheric state parameters during the test period, input them into radiation transmission software, and calculate the atmospheric extinction coefficient on the air-to-ground observation path. Based on the radiation contrast of ground cooperative targets and the atmospheric extinction coefficient measurement results, the attenuation of the target background contrast with distance is calculated, and compared with the images obtained by the airborne sensor to verify the consistency of the atmospheric extinction modeling results with the actual observation results.

[0094] The above test process is carried out multiple times under different weather conditions. If the effective distance obtained by modeling according to environmental conditions is consistent with the actual effective distance of the equipment, the purpose of verifying the impact model is achieved. If there is a difference between the modeling and the actual effective distance results, the source of the difference is checked one by one according to the measurement results of each link, and the model is modified and improved.

[0095] In summary, the specific process of calibration in this embodiment includes:

[0096] Step S21, according to the key dimensions considered by the target characteristic factors in the air-to-ground synchronization test, the first mathematical model is used to calculate the first action distance of the optoelectronic equipment at each perception level by considering the key dimensions of the target characteristic factors in the air-to-ground synchronization test;

[0097] Step S22, calculating a second action distance of the meteorological environment elements in the air-to-ground synchronous test on the optoelectronic equipment by using the second mathematical model according to the meteorological environment elements in the air-to-ground synchronous test;

[0098] Step S23, using the images acquired by the airborne sensor in the air-to-ground synchronous test, determining the first action distance measurement value of the key dimensions of the target characteristic factors in the air-to-ground synchronous test for the optoelectronic equipment at each perception level and the second action distance measurement value of the meteorological environment factors in the air-to-ground synchronous test for the optoelectronic equipment;

[0099] Step S24, comparing the first action distance measurement value and the second action distance measurement value and the first action distance calculation value and the second action distance calculation value;

[0100] Step S25: modify the first mathematical model and the second data model according to the comparison result.

[0101] Step S3: using the corrected environmental factor influence model on the action distance, determining the sensitivity value of each environmental factor on the action distance, so as to determine the key factor among the environmental factors.

[0102] As the radiation energy interacts with the components in the atmosphere during its propagation, the radiation energy of the target-background is constantly attenuated. The longer the propagation distance, the greater the attenuation amplitude. The magnitude of the atmospheric attenuation amplitude is usually characterized by the atmospheric attenuation coefficient μ (1 / km), that is, the atmospheric transmittance τ is:

[0103] τ(λ)=e -μ(λ)R ;

[0104] Where R is the transmission distance; μ(λ) is the atmospheric attenuation coefficient of wavelength λ, which is the sum of the absorption coefficient and scattering coefficient of light by the material components in the atmosphere; λ is the wavelength; τ(λ) is the atmospheric transmittance of wavelength λ;

[0105] Due to the complexity of the factors involved in meteorological conditions, the main influencing environmental factors in the infrared band are considered here: temperature, humidity, atmospheric visibility that describes aerosol scattering, and target characteristic factors that consider the inherent temperature difference between key dimensions and target background, and sensitivity analysis is carried out on the above five parameters.

[0106] Sensitivity analysis usually assumes that a certain parameter has a small error, and other parameters remain unchanged or change within a specified range, and analyzes the changes in the final results caused by this error under different circumstances. s To express the change in the predicted distance caused by disturbing a certain parameter under the same conditions, the calculation formula is as follows:

[0107] δL s =|L s (x+δx)-L s (x)|;

[0108] Among them, δL s is the change amplitude of the independent variable X on the target range prediction result; X is the independent variable (i.e. variable parameter) targeted by the sensitivity analysis; δx is the error that may be generated by the independent variable X or the error value added by disturbing the variable, L s (x+δx) and L s (x) is the range predicted by the sensor performance model when the independent variables are x+δx and x respectively.

[0109] Based on the above analysis, the specific process of determining the sensitivity value of each environmental factor on the action distance in this embodiment includes:

[0110] Step S31, selecting one environmental factor from the environmental factors as a variable parameter, and taking the remaining environmental factors as fixed parameters;

[0111] Step S32, using the corrected environmental factor effect model on the action distance, calculating the change amplitude value of each variable parameter on the action distance effect prediction result before and after the disturbance processing (that is, the change amplitude value is the sensitivity value);

[0112] Step S33: sort the sensitivity values ​​of all variable parameters on the prediction results of the action distance to determine the key factors.

[0113] In order to verify the influence of the main link parameters on the working distance of the optoelectronic system, an imaging sensor is used for verification. The main parameters of the example sensor are shown in Table 2:

[0114] Table 2 Sensor parameters used in the test

[0115]

[0116]

[0117] Taking the above sensor as an example, based on the MRTD theory and the range model, a sensitivity analysis was conducted on five parameters: visibility, temperature, humidity, target key size, and target-background inherent temperature difference.

[0118] Through the sensitivity analysis results of different meteorological environmental elements, we intend to obtain the sensitivity level of the action distance affected by these factors. Then we can determine the sensitivity of the elements and the typical interval division step size that characterizes the change of the action distance. Figure 4 , the sensitivity ranking results of the medium wave system's operating distance to various parameters are referenced Figure 5 .

[0119] This embodiment uses the corrected environmental factor influence model on the action distance of optoelectronic equipment to find out the key environmental factors that affect the dynamic performance of optoelectronic weapons, depicts the envelope curve of the dynamic performance of optoelectronic equipment changing with environmental conditions, and expands the traditional static equipment performance description method to a larger range of dynamic environmental conditions, providing equipment users with a simple and direct equipment performance environmental impact assessment method and tool, thereby achieving accurate assessment of the dynamic performance of optoelectronic equipment under different environmental conditions and maximizing the combat effectiveness of optoelectronic equipment.

[0120] The above embodiment can be implemented by adopting the technical solutions given in the following embodiments:

[0121] Another embodiment provides a typical optoelectronic equipment dynamic performance description system based on atmospheric environment sensitivity analysis, and the optoelectronic equipment dynamic performance description system includes:

[0122] A construction module is used to construct a model of the influence of environmental factors on the action distance of optoelectronic equipment according to environmental factors;

[0123] A correction module, used to correct the model of the influence of the environmental factors on the action distance by using the air-ground synchronous collection test results;

[0124] The determination module is used to use the corrected environmental factor impact model on the action distance to determine the sensitivity value of each environmental factor on the action distance, so as to determine the key factors among the environmental factors.

[0125] Furthermore, the building blocks include:

[0126] A division submodule is used to divide the target detected by the optoelectronic equipment into perception levels to determine the critical size of the target image of the optoelectronic equipment at each perception level and the number of target line pairs of the target image in the direction of the critical size of the target image;

[0127] The first determination submodule is used to solve the target detection and recognition distance under different meteorological conditions according to the target spatial frequency under different meteorological conditions, the target image critical size of the optoelectronic equipment at each perception level and the number of target line pairs of the target image in the direction of the target image critical size, so as to establish a first mathematical model that considers the influence of the target characteristic factor on the effective distance of the optoelectronic equipment at each perception level;

[0128] A mapping submodule, used to map the dynamic changes of meteorological environmental elements into changes of atmospheric extinction coefficient using a radiation transfer model, so as to form a second mathematical model of the influence of meteorological environmental elements on the action distance of optoelectronic equipment;

[0129] A submodule is formed, which is used to form a model of the influence of environmental factors on the action distance of optoelectronic equipment by using the first mathematical model and the second mathematical model.

[0130] Furthermore, the correction module includes:

[0131] A first calculation submodule is used to calculate the first action distance of the optoelectronic equipment at each perception level by using the first mathematical model based on the key dimensions of the target characteristic factors in the air-to-ground synchronization test;

[0132] A second calculation submodule is used to calculate a second action distance of the meteorological environment elements in the air-to-ground synchronous test on the optoelectronic equipment using the second mathematical model according to the meteorological environment elements in the air-to-ground synchronous test;

[0133] The second determination submodule is used to determine the first effective distance measurement value of the optoelectronic equipment at each perception level considering the key dimensions of the target characteristic factors in the air-to-ground synchronous test and the second effective distance measurement value of the optoelectronic equipment by the meteorological environment factors in the air-to-ground synchronous test by using the images obtained by the airborne sensor in the air-to-ground synchronous test;

[0134] A comparison submodule, configured to compare the first action distance measurement value and the second action distance measurement value and the first action distance calculation value and the second action distance calculation value;

[0135] The modification submodule is used to modify the first mathematical model and the second data model according to the comparison result.

[0136] Furthermore, the determination module includes:

[0137] A selection submodule is used to select one environmental factor from the environmental factors as a variable parameter and use the remaining environmental factors as fixed parameters;

[0138] The calculation submodule is used to use the corrected environmental factor impact model on the action distance to calculate the change amplitude value of each variable parameter on the action distance impact prediction result before and after the disturbance treatment;

[0139] Wherein, the variation amplitude value is a sensitivity value;

[0140] The sorting submodule is used to sort the sensitivity values ​​of all variable parameters on the prediction results of the action distance to determine the key factors.

[0141] The principles, formulas and parameter definitions involved in the above embodiments are all applicable and will not be described in detail here.

[0142] Please note that the technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. The above embodiments only express several implementation methods of the present application, and their descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present application, several variations and improvements can be made, which all belong to the scope of protection of the present application. Therefore, the scope of protection of the patent in this application shall be based on the attached claims.

Claims

1. A method for describing the dynamic performance of typical optoelectronic equipment based on atmospheric environment sensitivity analysis, characterized in that: The method for describing the dynamic performance of optoelectronic equipment comprises: Step S1, constructing a model of the influence of environmental factors on the distance of optoelectronic equipment according to environmental factors; Step S2, using the air-ground synchronous collection test results to calibrate the model of the impact of the environmental factors on the action distance; Step S3: using the corrected environmental factor influence model on the action distance, determining the sensitivity value of each environmental factor on the action distance, so as to determine the key factor among the environmental factors.

2. The method for describing the dynamic performance of typical optoelectronic equipment according to claim 1, characterized in that: In the step S1, the environmental factors include meteorological environmental factors, target characteristic factors considering key dimensions and target background inherent temperature difference; The meteorological environmental elements include atmospheric temperature, humidity and visibility; The target characteristic factor considers key dimensions including target spatial frequency, target image critical dimension and target line pair number of the target image in the direction of the target image critical dimension.

3. The method for describing the dynamic performance of typical optoelectronic equipment according to claim 2, characterized in that: In step S1, the specific process of constructing the model of the influence of environmental factors on the action distance of optoelectronic equipment includes: Step S11, dividing the target detected by the optoelectronic equipment into perception levels to determine the critical size of the target image of the optoelectronic equipment at each perception level and the number of target line pairs of the target image in the direction of the critical size of the target image; Step S12, according to the target spatial frequency under different meteorological conditions, the target image critical size of the optoelectronic equipment at each perception level and the number of target line pairs of the target image in the direction of the target image critical size, the target detection and recognition distance under different meteorological conditions is solved to establish a first mathematical model that considers the influence of the critical size on the effective distance of the optoelectronic equipment at each perception level by the target characteristic factor; Step S13: using a radiation transmission model, mapping the dynamic changes of meteorological environmental elements into changes in atmospheric extinction coefficients to form a second mathematical model of the impact of meteorological environmental elements on the range of action of optoelectronic equipment; Step S14: using the first mathematical model and the second mathematical model, a model of the influence of environmental factors on the action distance of optoelectronic equipment is formed.

4. The method for describing the dynamic performance of typical optoelectronic equipment according to any one of claims 1 to 3, characterized in that: In step S2, the specific process of the correction includes: Step S21, according to the key dimensions considered by the target characteristic factors in the air-to-ground synchronization test, the first mathematical model is used to calculate the first action distance of the optoelectronic equipment at each perception level by considering the key dimensions of the target characteristic factors in the air-to-ground synchronization test; Step S22, calculating a second action distance of the meteorological environment elements in the air-to-ground synchronous test on the optoelectronic equipment by using the second mathematical model according to the meteorological environment elements in the air-to-ground synchronous test; Step S23, using the images acquired by the airborne sensor in the air-to-ground synchronous test, determining the first action distance measurement value of the key dimensions of the target characteristic factors in the air-to-ground synchronous test for the optoelectronic equipment at each perception level and the second action distance measurement value of the meteorological environment factors in the air-to-ground synchronous test for the optoelectronic equipment; Step S24, comparing the first action distance measurement value and the second action distance measurement value and the first action distance calculation value and the second action distance calculation value; Step S25: modify the first mathematical model and the second data model according to the comparison result.

5. The method for describing the dynamic performance of typical optoelectronic equipment according to claim 4, characterized in that: In step S3, the specific process of determining the sensitivity value of each environmental factor on the action distance includes: Step S31, selecting one environmental factor from the environmental factors as a variable parameter, and taking the remaining environmental factors as fixed parameters; Step S32, using the corrected environmental factor effect model on the action distance, calculating the change amplitude of each variable parameter on the action distance effect prediction result before and after the disturbance processing; Wherein, the variation amplitude value is a sensitivity value; Step S33: sort the sensitivity values ​​of all variable parameters on the prediction results of the action distance to determine the key factors.

6. A typical optoelectronic equipment dynamic performance description system based on atmospheric environment sensitivity analysis, characterized in that: The optoelectronic equipment dynamic performance description system comprises: A construction module is used to construct a model of the influence of environmental factors on the action distance of optoelectronic equipment according to environmental factors; A correction module, used to correct the model of the influence of the environmental factors on the action distance by using the air-ground synchronous collection test results; The determination module is used to use the corrected environmental factor impact model on the action distance to determine the sensitivity value of each environmental factor on the action distance, so as to determine the key factors among the environmental factors.

7. The typical optoelectronic equipment dynamic performance description system according to claim 6, characterized in that: The building blocks include: A division submodule is used to divide the target detected by the optoelectronic equipment into perception levels to determine the critical size of the target image of the optoelectronic equipment at each perception level and the number of target line pairs of the target image in the direction of the critical size of the target image; The first determination submodule is used to solve the target detection and recognition distance under different meteorological conditions according to the target spatial frequency under different meteorological conditions, the target image critical size of the optoelectronic equipment at each perception level and the number of target line pairs of the target image in the direction of the target image critical size, so as to establish a first mathematical model that considers the influence of the target characteristic factor on the effective distance of the optoelectronic equipment at each perception level; A mapping submodule, used to map the dynamic changes of meteorological environmental elements into changes of atmospheric extinction coefficient using a radiation transfer model, so as to form a second mathematical model of the influence of meteorological environmental elements on the action distance of optoelectronic equipment; A submodule is formed, which is used to form a model of the influence of environmental factors on the action distance of optoelectronic equipment by using the first mathematical model and the second mathematical model.

8. The typical optoelectronic equipment dynamic performance description system according to claim 7, characterized in that: The correction module includes: A first calculation submodule is used to calculate the first action distance of the optoelectronic equipment at each perception level by using the first mathematical model based on the key dimensions of the target characteristic factors in the air-to-ground synchronization test; A second calculation submodule is used to calculate a second action distance of the meteorological environment elements in the air-to-ground synchronous test on the optoelectronic equipment using the second mathematical model according to the meteorological environment elements in the air-to-ground synchronous test; The second determination submodule is used to determine the first effective distance measurement value of the optoelectronic equipment at each perception level considering the key dimensions of the target characteristic factors in the air-to-ground synchronous test and the second effective distance measurement value of the optoelectronic equipment by the meteorological environment factors in the air-to-ground synchronous test by using the images obtained by the airborne sensor in the air-to-ground synchronous test; A comparison submodule, configured to compare the first action distance measurement value and the second action distance measurement value and the first action distance calculation value and the second action distance calculation value; The modification submodule is used to modify the first mathematical model and the second data model according to the comparison result.

9. The typical optoelectronic equipment dynamic performance description system according to claim 8, characterized in that: The determination module comprises: A selection submodule is used to select one environmental factor from the environmental factors as a variable parameter and use the remaining environmental factors as fixed parameters; The calculation submodule is used to use the corrected environmental factor impact model on the action distance to calculate the change amplitude value of each variable parameter on the action distance impact prediction result before and after the disturbance treatment; Wherein, the variation amplitude value is a sensitivity value; The sorting submodule is used to sort the sensitivity values ​​of all variable parameters on the prediction results of the action distance to determine the key factors.

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