Target range external measurement equipment target number-real synthesis construction method and system

Abstract

The invention provides a target range external measurement equipment target number real synthesis construction method and system, and the method comprises the steps: constructing a three-dimensional digital model, a space trajectory model and a feature event model according to the actual condition of a tested object; meanwhile, constructing a digital space consistent with a real target range; generating a digital target by using a computer simulation technology, enabling the digital target to move along the spatial trajectory model and generating a feature event related to a target behavior; establishing a detection characteristic model of external detection equipment, and simulating optical characteristics and radio characteristics of a digital target in combination with influences of different detection conditions in a real environment; optical characteristics and radio characteristics of the digital target are processed, and a simulation target signal meeting the detection requirement of external detection equipment is generated; and according to the processed target signal and the detection capability of the external detection equipment, generating a simulation target which can be detected on the external detection equipment. According to the invention, the real motion track and behavior change of the target in the target range can be simulated, so that the accuracy of target range test and performance evaluation is improved.

Description

Technical Field

[0001] The present invention belongs to the field of range testing, and particularly relates to a method and system for constructing a digital-physical synthesis of targets for external measurement equipment in a range. Background Art

[0002] With the rapid development of modern military technology, range testing, as an important means for evaluating the performance of weaponry and external measurement equipment, has become a crucial link in ensuring equipment reliability and combat capabilities. However, traditional range testing methods have many limitations. Firstly, the range environment is affected by factors such as geography and weather, making it difficult to provide consistent and accurate test conditions. Secondly, range testing requires a large amount of physical resources, such as physical targets, external measurement equipment, and test personnel, which not only incurs huge time and economic costs but also restricts the diversity and flexibility of testing. In addition, the process of simulating target behaviors in different combat environments in the range is cumbersome and limited, making it difficult to fully test the performance of equipment in complex and changing environments.

[0003] To overcome the above problems, in recent years, computer simulation technology has gradually been applied to range testing. By simulating target behaviors and the detection process of external measurement equipment in a virtual environment, it provides a more efficient and cost-effective alternative for equipment performance evaluation. However, existing simulation technologies usually neglect the combination of the real environment and equipment performance, resulting in a large gap between simulation results and actual situations. Therefore, how to achieve an organic combination of digital targets, the real range environment, and the detection characteristics of external measurement equipment in a virtual range environment has become a major problem in current research and applications. Summary of the Invention

[0004] The object of the present invention is to provide a method and system for constructing a digital-physical synthesis of targets for external measurement equipment in a range, which can generate digital targets consistent with the real range in the digital space, simulate target behaviors and the detection capabilities of external measurement equipment, achieve high compatibility and verification accuracy between targets and external measurement equipment, and thus improve the efficiency and accuracy of range testing.

[0005] The technical solution of the present invention is as follows: A method for constructing a digital-physical synthesis of targets for external measurement equipment in a range, comprising the following steps: a) According to the actual situation of the test article, construct a three-dimensional digital model, a spatial trajectory model, and a characteristic event model; at the same time, according to the actual spatial distribution of the range, construct a digital space consistent with the real range; the construction of the three-dimensional digital model, spatial trajectory model, and characteristic event model is based on the physical properties, behavioral characteristics of the test article, and its interaction with the environment, and is generated through computer-aided design tools; b) Within the constructed digital space, use computer simulation technology to generate digital targets, make them move along the spatial trajectory model and generate characteristic events related to the target behavior, simulating the behavior changes of the target under different environments; c) Establish a detection characteristic model of the external measurement equipment, and combine the influences of different detection conditions in the real environment to simulate the optical characteristics and radio characteristics of the digital target; The simulation of the optical characteristics of the digital target includes: calculating the reflection, refraction, and scattering light intensity distributions of the target under different lighting conditions according to the optical propagation law and the optical parameters of the target surface material; The simulation of the radio characteristics of the digital target includes: calculating the radar cross section and signal propagation loss of the target under different electromagnetic environments based on the electromagnetic propagation theory and the electromagnetic structure parameters of the target; d) Process the optical and radio characteristics of the digital target, simulate the responses of the target under different detection conditions, and generate simulated target signals that meet the detection requirements of the external measurement equipment; The optical characteristic processing includes: simulating the propagation of light in different bands, and according to the digital target geometry, surface material, atmospheric refractive index, temperature and humidity, adjusting the reflection and refraction of the target in real time to generate corresponding simulated optical signals; The radio characteristic processing includes: using electromagnetic simulation software to simulate the reflective, transponder, and beacon radio signals of the digital target, and through the simulation of the target's reflected, transmitted, and received signals, adjusting the signal amplitude, frequency, and phase to generate radio waveform signals that meet the detection conditions of the external measurement equipment; e) According to the processed target signals and the detection capabilities of the external measurement equipment, first screen out the target characteristic parameters that meet the detection conditions of the external measurement equipment, and then synthesize the target characteristic parameters in the signal format that the external measurement equipment can receive and process to generate simulated targets that can be detected on the external measurement equipment.

[0006] Further, the range digital space includes the target area, obstacles, scene terrain, layout and detection range of the external measurement equipment within the range.

[0007] Further, the detection characteristic model of the external measurement equipment includes an optical detection model, a radar detection model, and a radio detection model.

[0008] Further, the characteristic event model includes the movement changes of the target, the disappearance and appearance of the target, the interaction between the target and other targets or obstacles, and the event that the target is detected, and generates corresponding data signals for processing according to the different detection characteristics of the external measurement equipment.

[0009] Further, the optical characteristic processing includes simulating different bands of visible light, long-wave infrared, mid-wave infrared, and short-wave infrared, and dynamically adjusting the detection response of the device under different environmental conditions.

[0010] The present invention also provides a virtual-reality synthesis construction system for outfield measurement equipment of a target, including the following modules: A three-dimensional modeling module, which is used to construct a three-dimensional digital model, a spatial trajectory model, and a characteristic event model of a test article according to its actual situation, and generate a digital space according to the spatial layout of the shooting range; A digital target generation module, which is used to generate digital targets in the constructed digital space, make them move along the spatial trajectory model, and generate characteristic events related to the target behavior; A detection characteristic modeling module, which is used to establish a detection characteristic model of the outfield measurement equipment, and simulate the optical characteristics and radio characteristics of digital targets in combination with the influence of different detection conditions in the real environment; A signal processing module, which is used to process the optical and radio characteristics of digital targets and generate a simulated target signal that meets the detection requirements of the outfield measurement equipment; A simulated target generation module, which is used to input the generated simulated target signal into the outfield measurement equipment to generate a simulated target that can be detected on the outfield measurement equipment.

[0011] Compared with the prior art, the present invention has the following advantages: By combining three-dimensional digital modeling, spatial trajectory simulation, and characteristic event modeling, the present invention can highly restore the real shooting range environment and target behavior. Through the construction of a digital space and the three-dimensional digital model of the target, combined with the detection characteristics of the outfield measurement equipment, it can simulate the real movement trajectory and behavior changes of the target in the shooting range, thereby improving the accuracy of shooting range testing and performance evaluation.

[0012] The present invention organically combines digital simulation with the actual shooting range environment and the detection conditions of the outfield measurement equipment through the virtual-reality synthesis method. Different from traditional pure digital simulation, the present invention accurately restores the spatial distribution of the real shooting range, considers the actual influence of optical characteristics and radio characteristics, makes the simulation result closer to the actual detection situation, and improves the authenticity and reliability of the simulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings generally illustrate various embodiments by way of example and not limitation, and are used together with the description and the claims to illustrate the embodiments of the invention. Where appropriate, the same reference numerals are used throughout the drawings to refer to the same or similar parts. Such embodiments are illustrative and are not intended to be an exhaustive or exclusive embodiment of the device or method.

[0014] Figure 1Shows the schematic diagram of the step flow of the present invention. Detailed implementation manners

[0015] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The following will refer to the drawings and combine with embodiments to detail this application.

[0016] As Figure 1 shown, the method for constructing the real - virtual synthesis of the target number of the out - of - range measurement equipment provided by the present invention includes the following steps: Construction of three - dimensional digital model, space trajectory model and feature event model First, according to the actual situation of the test article, use laser scanning technology to perform high - precision scanning on the target to obtain its three - dimensional data. By using high - precision scanning equipment such as Faro 3D scanner, capture the geometric shape, surface texture and other physical characteristics of the target, and generate a preliminary three - dimensional structure through point cloud data. When using the Faro 3D scanner for scanning, adjust the scanning resolution according to the size and complexity of the target. For small and regular - shaped targets, the resolution is set to 0.5mm; for large or complex targets, the resolution is set to 1 - 2mm to ensure obtaining accurate geometric shape and surface texture data. At the same time, during the scanning process, it is necessary to perform all - around scanning around the target to ensure that the scanning angle covers 360° in the horizontal direction and 180° in the vertical direction to avoid data omission. Then, use three - dimensional modeling software (such as SolidWorks) to convert the point cloud data into a standard three - dimensional digital model and refine the surface characteristics of the target, such as texture, material, glossiness, etc. In this process, the physical properties of the target, such as density, elastic modulus, thermal conductivity, etc., will also be incorporated into the model. Secondly, based on the kinematic characteristics of the target (such as speed, acceleration, direction, etc.), use the Bezier curve method to generate a space trajectory model. This trajectory model will reflect the movement path of the target in the shooting range and be dynamically adjusted according to environmental factors (such as wind speed, air density, etc.) to ensure the naturalness and authenticity of the target movement. During the construction process, the interactive behaviors of the target are also considered, such as events of collision and encounter between the target and other targets or obstacles. Use a time - driven trigger mechanism to set key events, such as the appearance of the target, the disappearance of the target, the collision between the target and obstacles or other targets, etc. When the target reaches a specific position or time in space, trigger the corresponding behavior events.

[0017] Generation of digital target and behavior simulation Within the constructed digital space, a digital target is generated using a physics engine (such as Unity3D) and made to move along a spatial trajectory model. The physics engine can simulate the dynamic behavior of the target, including factors such as speed, acceleration, and direction changes, ensuring the naturalness and accuracy of the target's movement in the shooting range. At the same time, the physics engine will dynamically adjust the target's movement trajectory based on the target's initial state and environmental factors (such as wind speed, temperature, air density, etc.). For example, when the target encounters an obstacle, the physics engine can simulate the target's reaction according to the collision rules, such as elastic reflection, inelastic reflection, or other changes in the motion state. In addition, the behavior events of the target will also be triggered in the physics engine, and the specific behaviors include the sudden appearance of the target, the change of the target's movement path, the disappearance of the target, etc. The occurrence of each event will be triggered according to the target's current state and external conditions, and the actual behavior of the target under these conditions will be verified through physical simulation. For example, when the target's acceleration change exceeds 0.5 m / s², it is determined as an acceleration or deceleration event; when the target's angular velocity change exceeds 0.1 rad / s, it is determined as a turning event. For the disappearance and appearance events of the target, clear judgment criteria are set. For example, when the target is not detected within 5 - 10 consecutive frames, it is determined that the target has disappeared; when the target meets the detection conditions again after not appearing for a period of time, it is determined that the target has appeared.

[0018] Establish the detection characteristic model of external measurement equipment Next, construct the detection characteristic model of the external measurement equipment, mainly including the optical detection model and the radio detection model. The optical detection model simulates the target through ray tracing algorithm. Ray tracing technology can simulate the behaviors of light such as reflection, refraction, and scattering on the surfaces of different materials, and calculate the optical response of the target according to the surface material of the target and the illumination conditions of the environment. The propagation path of the light is traced and the light intensity after reflection is calculated to further simulate the detectability of the target by the optical sensor of the external measurement equipment. In addition, it is also necessary to model the infrared characteristics of the target. Based on the thermal radiation characteristics of the target, the radiation transfer model is used to calculate the thermal signal of the target, so as to simulate the thermal detection characteristics of the target in different environments. In terms of radio detection, the electromagnetic simulation software (such as HFSS or CST Microwave Studio) is used to simulate the radar cross section (RCS), radio wave propagation characteristics, etc. of the target, and simulate the behaviors of the target such as reflection, emission, and absorption of radio waves. The simulation of radio signals includes the calculation of the signal propagation path between the target and the external measurement equipment, simulating the radio waveform signal of the target, and providing a signal source for subsequent detection simulation.

[0019] Processing of the optical and radio characteristics of digital targets Process the generated optical signals and radio signals to meet the detection requirements of the external measurement equipment. In optical characteristic processing, use optical simulation software (such as OpticStudio or RayTracing) to simulate the light propagation in different bands (such as visible light, infrared light), and adjust the optical characteristics such as reflection and refraction of the target according to the geometric shape, surface material, and external environmental conditions of the target. For each optical band (visible light, long-wave infrared, mid-wave infrared, short-wave infrared, etc.), the optical signal will be adjusted in real time according to different environmental conditions (such as atmospheric refractive index, temperature, humidity, etc.), and the corresponding simulated optical signal will be generated. Taking the long-wave infrared band as an example, when the atmospheric humidity is high, water vapor in the atmosphere will absorb and scatter the long-wave infrared light, resulting in the attenuation of the optical signal intensity. In OpticStudio, by setting the atmospheric transmission model and inputting the current atmospheric humidity, temperature, pressure and other parameters, simulate the influence of the atmosphere on the long-wave infrared light, and make corresponding adjustments to the intensity and wavelength distribution of the optical signal to generate a simulated optical signal that conforms to the actual situation.

[0020] In terms of radio characteristic processing, use electromagnetic simulation software to simulate the radar cross section (RCS) of the target and the radio wave propagation characteristics, and generate radio signals that meet the detection requirements of the external measurement equipment. This includes simulating the radio characteristics such as reflection, scattering, and emission of the target, and generating the final radio waveform signal through parameters such as the amplitude, frequency, and phase of the signal for the external measurement equipment to detect.

[0021] Generation of simulated target signals Finally, according to the generated optical and radio signals, use signal processing algorithms to optimize and adjust the signals to ensure that the frequency, amplitude, and waveform of the signals match the detection capabilities of the external measurement equipment. The frequency, waveform, and amplitude of the signals will be adjusted according to the detection range, detection accuracy, and sensitivity of the external measurement equipment to ensure that the simulated signals conform to the actual detection conditions. The processed signals are input into the external measurement equipment to generate the detection response of the target in the external measurement equipment. Through the simulated detection of the target, evaluate the performance of the external measurement equipment under different detection conditions, such as detection sensitivity, signal-to-noise ratio, recognition accuracy, etc. In actual tests, input the processed simulated signals into the signal input end of the external measurement equipment and record the output signals of the external measurement equipment. By analyzing the characteristics such as the amplitude, frequency, and phase of the output signals, calculate the detection sensitivity, that is, the minimum signal intensity that the external measurement equipment can detect; by comparing the noise levels of the input signals and the output signals, calculate the signal-to-noise ratio to evaluate the performance of the external measurement equipment in a noisy environment; by matching with the known target characteristics, evaluate the recognition accuracy of the external measurement equipment and judge its recognition accuracy of the target.

[0022] Based on the above method, the present invention can also be implemented through the following system: 3D Modeling Module: Used to construct 3D digital models, spatial trajectory models, and characteristic event models based on the physical properties of the test item and the spatial distribution of the shooting range, using laser scanning and 3D modeling software.

[0023] Digital Target Generation Module: Generates digital targets through a physics engine, ensuring that the targets can move along the spatial trajectory model and generate characteristic events.

[0024] Detection Characteristic Modeling Module: Constructs the detection characteristic model of the external measurement equipment through ray tracing algorithms and electromagnetic simulation tools, and simulates the optical and radio characteristics of the target under different detection conditions.

[0025] Signal Processing Module: Processes the generated optical signals and radio signals, adjusting the frequency, waveform, and intensity of the signals to ensure that they meet the detection capabilities of the external measurement equipment.

[0026] Simulated Target Generation Module: Inputs the processed signals into the external measurement equipment, generates simulated targets through the detectors of the equipment, and completes simulation and performance evaluation.

[0027] As described above, the above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A method for constructing digital synthesis of equipment targets outside a shooting range, characterized in that: The following steps are involved: a) Construct a three-dimensional digital model, a spatial trajectory model and a characteristic event model according to the actual situation of the test object; At the same time, according to the actual spatial distribution of the shooting range, a digital space consistent with the actual shooting range is constructed; the construction of the three-dimensional digital model, the spatial trajectory model and the characteristic event model is based on the physical properties, behavioral characteristics and interaction of the test object with the environment, and is generated by computer-aided design tools; b) In the constructed digital space, a digital target is generated using computer simulation technology, so that it moves along the spatial trajectory model and generates characteristic events related to the target's behavior, simulating the target's behavior changes in different environments; c) Establish the detection characteristic model of the external test equipment, and simulate the optical and radio characteristics of the digital target by combining the influence of different detection conditions in the real environment; The optical characteristics of the simulated digital target include: calculating the reflection, refraction and scattered light intensity distribution of the target under different lighting conditions according to the optical propagation law and the optical parameters of the target surface material; The radio characteristics of the simulated digital target include: calculating the radar scattering cross-section and signal propagation loss of the target in different electromagnetic environments based on electromagnetic propagation theory and electromagnetic structural parameters of the target; d) Process the optical and radio characteristics of the digital target, simulate the target's response under different detection conditions, and generate simulated target signals that meet the detection requirements of the external test equipment; Optical property processing includes: simulating the propagation of light in different bands, adjusting the reflection and refraction of the target in real time according to the digital target geometry, surface material, atmospheric refractive index, temperature and humidity, and generating corresponding simulated optical signals; Radio characteristic processing includes: using electromagnetic simulation software to simulate digital target reflection, response, and beacon radio signals, adjusting signal amplitude, frequency, and phase through simulation of target reflection, transmission, and reception signals, and generating radio waveform signals that meet the detection conditions of external test equipment; e) Based on the processed target signal and the detection capability of the external test equipment, firstly, target characteristic parameters that meet the detection conditions of the external test equipment are screened out, and then, the target characteristic parameters are synthesized according to the signal format that can be received and processed by the external test equipment to generate a simulated target that can be detected by the external test equipment.

2. The method for constructing target digital synthesis of equipment outside the shooting range according to claim 1, characterized in that: The shooting range digital space includes the target area, obstacles, scene terrain, layout and detection range of external measurement equipment within the shooting range.

3. The method for constructing target digital synthesis of equipment outside the shooting range according to claim 1, characterized in that: The detection characteristic model of the external measurement equipment includes an optical detection model, a radar detection model and a radio detection model.

4. The method for constructing target digital synthesis of equipment outside the shooting range according to claim 1, characterized in that: The feature event model includes the movement changes of the target, the disappearance and appearance of the target, the interaction between the target and other targets or obstacles, and the event of the target being detected, and generates corresponding data signals for processing according to the different detection characteristics of the external measurement equipment.

5. The method for constructing target digital synthesis of equipment outside the shooting range according to claim 1, characterized in that: The optical property processing includes simulating different bands of visible light, long-wave infrared, medium-wave infrared and short-wave infrared, and dynamically adjusting the detection response of the device under different environmental conditions.

6. A system for constructing digital and real synthesis of equipment targets outside the shooting range, characterized in that: Includes the following modules: The three-dimensional modeling module is used to construct the three-dimensional digital model, spatial trajectory model and characteristic event model of the test object according to its actual situation, and generate the digital space according to the spatial layout of the shooting range; A digital target generation module is used to generate a digital target in the constructed digital space and make it move along the space trajectory model to generate characteristic events related to the target behavior; The detection characteristic modeling module is used to establish the detection characteristic model of the external test equipment and simulate the optical and radio characteristics of the digital target in combination with the influence of different detection conditions in the real environment; The signal processing module is used to process the optical and radio characteristics of the digital target and generate analog target signals that meet the detection requirements of the external test equipment; The simulated target generation module is used to input the generated simulated target signal into the external test equipment to generate a simulated target that can be detected by the external test equipment.

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