A method and system for constructing digital and real synthesis of equipment targets outside the shooting range

Abstract

The present invention provides a method and system for constructing a digital-realistic synthesis of targets for outdoor test equipment at a shooting range, comprising: constructing a three-dimensional digital model, a spatial trajectory model, and a characteristic event model based on the actual conditions of a test object; simultaneously, constructing a digital space consistent with the actual shooting range; utilizing computer simulation technology to generate a digital target, causing it to move along the spatial trajectory model and generate characteristic events related to the target's behavior; establishing a detection characteristic model for the outdoor test equipment, and simulating the optical and radio characteristics of the digital target in combination with the influence of different detection conditions in a real environment; processing the optical and radio characteristics of the digital target to generate a simulated target signal that meets the detection requirements of the outdoor test equipment; and generating a simulated target that can be detected by the outdoor test equipment based on the processed target signal and the detection capability of the outdoor test equipment. The present invention can simulate the actual motion trajectory and behavioral changes of a target in a shooting range, thereby improving the accuracy of shooting range testing and performance evaluation.

Description

Technical Field

[0001] The present invention belongs to the field of shooting range testing, and in particular relates to a method and system for constructing target data synthesis of equipment outside the shooting range. Background Art

[0002] With the rapid development of modern military technology, range testing, as an important means of evaluating the performance of weapons and equipment and external test equipment, has become a key link in ensuring equipment reliability and combat capability. However, traditional range testing methods have many limitations. First, the range environment is affected by factors such as geography and weather, making it difficult to provide consistent and accurate testing conditions. Second, range testing requires a large amount of physical resources, such as physical targets, external test equipment, and testers, which not only results in huge time and economic costs, but also limits the diversity and flexibility of testing. In addition, the process of simulating target behavior 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 these challenges, computer simulation technology has been increasingly used in range testing in recent years. By simulating target behavior and the detection process of test equipment in a virtual environment, this technology offers a more efficient and cost-effective alternative for evaluating equipment performance. However, existing simulation techniques often neglect the integration of the real environment and equipment performance, resulting in significant discrepancies between simulation results and actual conditions. Therefore, achieving an effective integration of digital targets with the real-world environment and the detection characteristics of test equipment in a virtual range environment has become a major challenge in current research and application. Summary of the Invention

[0004] The purpose of the present invention is to provide a method and system for constructing digital-realistic targets for external test equipment in a shooting range, which can generate digital targets consistent with the real shooting range in digital space, simulate the target behavior and the detection capability of the external test equipment, and achieve high compatibility and verification accuracy between the target and the external test equipment, thereby improving the efficiency and accuracy of shooting range testing.

[0005] The technical solutions of the present invention are as follows:

[0006] A method for constructing a digital and real synthesis of equipment targets for off-range measurement, comprising the following steps:

[0007] a) Construct a three-dimensional digital model, a spatial trajectory model, and a characteristic event model based on the actual conditions of the test object; at the same time, construct a digital space consistent with the actual range based on the actual spatial distribution of the range; the three-dimensional digital model, spatial trajectory model, and characteristic event model are constructed based on the physical properties, behavioral characteristics, and interaction of the test object with the environment, and are generated using computer-aided design tools;

[0008] b) Using computer simulation technology within the constructed digital space, a digital target is generated, causing it to move along a spatial trajectory model and generate characteristic events related to the target's behavior, simulating the target's behavioral changes in different environments;

[0009] c) Establish a detection characteristic model for the external test equipment and simulate the optical and radio characteristics of digital targets by taking into account the influence of different detection conditions in the real environment;

[0010] 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 based on the optical propagation law and the optical parameters of the target surface material;

[0011] The radio characteristics of the simulated digital target include: calculating the radar 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;

[0012] 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;

[0013] 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;

[0014] Radio characteristic processing includes: using electromagnetic simulation software to simulate digital target reflection, response, and beacon radio signals. By simulating the target's reflection, transmission, and reception signals, the signal amplitude, frequency, and phase are adjusted to generate a radio waveform signal that meets the detection conditions of the external test equipment.

[0015] e) Based on the processed target signal and the detection capability of the external test equipment, first screen target characteristic parameters that meet the detection conditions of the external test equipment, then synthesize the target characteristic parameters according to the signal format that the external test equipment can receive and process, and generate a simulated target that can be detected by the external test equipment.

[0016] Furthermore, the shooting range digital space includes the target area, obstacles, scene terrain, layout of external measurement equipment and detection range within the shooting range.

[0017] Furthermore, the detection characteristic model of the external measurement equipment includes an optical detection model, a radar detection model and a radio detection model.

[0018] Furthermore, the feature event model includes the target's motion changes, the target's disappearance and appearance, the target's interaction with other targets or obstacles, and the target's detection event, and generates corresponding data signals for processing based on the different detection characteristics of the external measurement equipment.

[0019] Furthermore, the optical characteristic 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.

[0020] The present invention also provides a system for constructing target data and real-time synthesis of equipment targets outside the shooting range, including the following modules:

[0021] The 3D modeling module is used to construct a 3D digital model, spatial trajectory model, and characteristic event model of the test object based on its actual conditions, and to generate a digital space based on the spatial layout of the shooting range;

[0022] A digital target generation module is used to generate a digital target in the constructed digital space and make it move along the spatial trajectory model to generate characteristic events related to the target behavior;

[0023] 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 by combining the influence of different detection conditions in the real environment;

[0024] The signal processing module is used to process the optical and radio characteristics of the digital target and generate an analog target signal that meets the detection requirements of the external test equipment;

[0025] 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.

[0026] Compared with the prior art, the present invention has the following advantages:

[0027] By combining three-dimensional digital modeling, spatial trajectory simulation, and characteristic event modeling, this invention can highly reproduce the actual range environment and target behavior. By constructing a digital space and a three-dimensional digital model of the target, combined with the detection characteristics of external testing equipment, it can simulate the target's actual motion trajectory and behavioral changes in the range, thereby improving the accuracy of range testing and performance evaluation.

[0028] This invention organically combines digital simulation with the actual range environment and detection conditions of external test equipment through a digital-realistic synthesis approach. Unlike traditional purely digital simulations, this invention accurately reproduces the spatial distribution of the actual range and takes into account the actual influence of optical and radio characteristics. This makes the simulation results closer to actual detection conditions, improving the authenticity and reliability of the simulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings illustrate various embodiments generally by way of example and not limitation, and together with the description and claims, serve to explain 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 exhaustive or exclusive of the embodiments of the present apparatus or method.

[0030] Figure 1 A schematic flow chart of the steps of the present invention is shown. DETAILED DESCRIPTION

[0031] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] like Figure 1 As shown, the present invention provides a method for constructing target data synthesis of equipment outside the shooting range, which includes the following steps:

[0033] Construction of three-dimensional digital models, spatial trajectory models and feature event models

[0034] First, based on the actual conditions of the test object, laser scanning technology is used to perform high-precision scanning of the target to acquire its 3D data. Using high-precision scanning equipment such as the Faro 3D scanner, the target's geometry, surface texture, and other physical characteristics are captured, and a preliminary 3D structure is generated from the point cloud data. When scanning with the Faro 3D scanner, the scanning resolution is adjusted based on the target's size and complexity. For small, regularly shaped targets, the resolution is set to 0.5mm; for large or complex targets, the resolution is set to 1-2mm to ensure accurate geometry and surface texture data. Furthermore, the scanning process requires a full 360° horizontal and 180° vertical scan angle around the target to avoid missing data. Next, using 3D modeling software (such as SolidWorks), the point cloud data is converted into a standard 3D digital model, and the target's surface characteristics, such as texture, material, and gloss, are refined. During this process, the target's physical properties, such as density, elastic modulus, and thermal conductivity, are also incorporated into the model. Secondly, based on the target's kinematic characteristics (such as speed, acceleration, and direction), a Bezier curve method is used to generate a spatial trajectory model. This trajectory model reflects the target's movement path within the range and is dynamically adjusted based on environmental factors (such as wind speed and air density) to ensure the naturalness and authenticity of the target's movement. During the construction process, the target's interactive behavior is also taken into account, such as collisions and encounters with other targets or obstacles. A time-driven trigger mechanism is used to set key events, such as the target's appearance, disappearance, and collisions with obstacles or other targets. When the target reaches a specific position or time in space, the corresponding behavioral event is triggered.

[0035] Digital target generation and behavior simulation

[0036] Within the constructed digital space, a digital target is generated using a physics engine (such as Unity3D) and moved along a spatial trajectory model. The physics engine simulates the target's dynamic behavior, including factors such as velocity, acceleration, and directional changes, ensuring natural and accurate target movement within the range. Furthermore, the physics engine dynamically adjusts the target's trajectory based on the target's initial state and environmental factors such as wind speed, temperature, and air density. For example, when a target encounters an obstacle, the physics engine simulates its response based on collision rules, such as elastic or inelastic reflection, or other changes in its motion state. Furthermore, target behavioral events are triggered within the physics engine, including sudden appearance, changes in its motion path, and disappearance. Each event is triggered based on the target's current state and external conditions, and physics simulation verifies the target's actual behavior under these conditions. For example, a change in the target's acceleration exceeding 0.5 m / s² is considered an acceleration or deceleration event, while a change in the target's angular velocity exceeding 0.1 rad / s is considered a turn event. For the disappearance and appearance events of the target, set clear judgment criteria. For example, if the target is not detected within 5-10 consecutive frames, it is judged as the target disappearing; if the target meets the detection conditions again after a period of absence, it is judged as the target appearing.

[0037] Establishing detection characteristic model of external test equipment

[0038] Next, a detection model for the test equipment is constructed, primarily consisting of an optical detection model and a radio detection model. The optical detection model simulates the target using a ray tracing algorithm. Ray tracing technology simulates the reflection, refraction, and scattering of light on various surfaces, calculating the target's optical response based on the target's surface material and ambient lighting conditions. The light's propagation path is traced and the intensity of the reflected light is calculated, further simulating the target's detectability by the test equipment's optical sensors. Furthermore, the target's infrared characteristics must be modeled. Based on the target's thermal radiation characteristics, a radiation transfer model is used to calculate the target's thermal signature, thereby simulating the target's thermal detection characteristics in various environments. For radio detection, electromagnetic simulation software (such as HFSS or CST Microwave Studio) is used to simulate the target's reflection cross section (RCS) and radio wave propagation characteristics, simulating the target's reflection, emission, and absorption of radio waves. Radio signal simulation involves calculating the signal propagation path between the target and the test equipment, simulating the target's radio waveform signal, and providing a signal source for subsequent detection simulations.

[0039] Digital target optical and radio characteristic processing

[0040] The generated optical and radio signals are processed to meet the detection requirements of the field test equipment. To process optical properties, optical simulation software (such as OpticStudio or RayTracing) is used to simulate light propagation in different wavelengths (such as visible light and infrared light). The target's optical properties, such as reflection and refraction, are adjusted based on the target's geometry, surface material, and external environmental conditions. For each optical wavelength (visible light, long-wave infrared, medium-wave infrared, short-wave infrared, etc.), the optical signal is adjusted in real time based on environmental conditions (such as atmospheric refractive index, temperature, and humidity) to generate the corresponding simulated optical signal. For example, when atmospheric humidity is high in the long-wave infrared band, water vapor in the atmosphere absorbs and scatters long-wave infrared light, causing the optical signal intensity to attenuate. In OpticStudio, by setting up an atmospheric transmission model and inputting parameters such as current atmospheric humidity, temperature, and pressure, the atmospheric effects on long-wave infrared light are simulated. The intensity and wavelength distribution of the optical signal are adjusted accordingly to generate a simulated optical signal that matches the actual situation.

[0041] In terms of radio characteristic processing, electromagnetic simulation software is used to simulate the target's reflection cross section (RCS) and radio wave propagation characteristics to generate radio signals that meet the detection requirements of external test equipment. This includes simulating the target's radio characteristics such as reflection, scattering, and emission, and then generating the final radio waveform signal through parameters such as signal amplitude, frequency, and phase for detection by external test equipment.

[0042] Generation of analog target signals

[0043] Finally, signal processing algorithms are used to optimize and adjust the generated optical and radio signals, ensuring that their frequency, amplitude, and waveform match the detection capabilities of the field equipment. The frequency, waveform, and amplitude of the signals are adjusted based on the field equipment's detection range, accuracy, and sensitivity, ensuring that the simulated signals meet actual detection conditions. The processed signals are then input into the field equipment to generate the target's detection response. Through simulated target detection, the field equipment's performance under various detection conditions, such as detection sensitivity, signal-to-noise ratio, and recognition accuracy, is evaluated. In actual testing, the processed simulated signals are input into the field equipment's signal input, and the field equipment's output signals are recorded. By analyzing the output signal's amplitude, frequency, and phase, the detection sensitivity (the minimum signal strength detectable by the field equipment) is calculated. By comparing the noise levels of the input and output signals, the signal-to-noise ratio is calculated to assess the field equipment's performance in noisy environments. The field equipment's recognition accuracy is evaluated by matching the signal with known target characteristics, determining its accuracy in target recognition.

[0044] Based on the above method, the present invention can also be implemented by the following system:

[0045] 3D modeling module: used to construct 3D digital models, spatial trajectory models and characteristic event models based on the physical properties of the test object and the spatial distribution of the shooting range using laser scanning and 3D modeling software.

[0046] Digital target generation module: Generates digital targets through the physical engine, ensuring that the targets can move along the spatial trajectory model and generate characteristic events.

[0047] Detection characteristic modeling module: Through ray tracing algorithms and electromagnetic simulation tools, the detection characteristic model of the external test equipment is constructed, and the optical and radio characteristics of the target under different detection conditions are simulated.

[0048] Signal processing module: Processes the generated optical and radio signals, adjusts the frequency, waveform, and intensity of the signals to ensure that they meet the detection capabilities of the external test equipment.

[0049] Simulation target generation module: inputs the processed signal into the external test equipment, generates a simulation target through the equipment's detector, and completes simulation and performance evaluation.

[0050] The above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, can make equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, which should be covered by the scope of protection of the present invention.

Claims

1. A method for constructing a 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 based on the actual conditions of the test object; At the same time, a digital space consistent with the real shooting range is constructed based on the actual spatial distribution of the shooting range; the three-dimensional digital model, spatial trajectory model and characteristic event model are constructed based on the physical properties, behavioral characteristics and interaction of the test object with the environment, and are generated through computer-aided design tools; b) Using computer simulation technology within the constructed digital space, a digital target is generated, causing it to move along a spatial trajectory model and generate characteristic events related to the target's behavior, simulating the target's behavioral changes in different environments; c) Establish a detection characteristic model for the external test equipment and simulate the optical and radio characteristics of digital targets by taking into account 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 based on 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 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. By simulating the target's reflection, transmission, and reception signals, the signal amplitude, frequency, and phase are adjusted to generate a radio waveform signal that meets the detection conditions of the external test equipment. e) Based on the processed simulated target signal and the detection capability of the external test equipment, first, target characteristic parameters that meet the detection conditions of the external test equipment are screened out; then, the target characteristic parameters are synthesized according to a 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 data synthesis of shooting range external measurement equipment according to claim 1, characterized in that: The shooting range digital space includes the target area, obstacles, scene terrain, layout of external test equipment and detection range within the shooting range.

3. The method for constructing target data synthesis of shooting range external measurement equipment 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 data synthesis of shooting range external measurement equipment according to claim 1, characterized in that: The feature event model includes the target's motion changes, the target's disappearance and appearance, the target's interaction with other targets or obstacles, and the target's detection event, and generates corresponding data signals for processing based on the different detection characteristics of the external measurement equipment.

5. The method for constructing target data synthesis of shooting range external measurement equipment according to claim 1, characterized in that: The optical characteristic 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 target data and real-time synthesis of equipment targets outside the shooting range, characterized in that: Includes the following modules: A three-dimensional modeling module is used to construct a three-dimensional digital model, spatial trajectory model, and characteristic event model of the test object based on its actual conditions. At the same time, a digital space consistent with the actual shooting range is constructed based on the actual spatial distribution of the shooting range. The three-dimensional digital model, spatial trajectory model, and characteristic event model are constructed based on the physical properties, behavioral characteristics, and interaction of the test object with the environment, and are generated using computer-aided design tools. The digital target generation module is used to generate digital targets in the constructed digital space and make them move along the spatial trajectory model, generate characteristic events related to the target's behavior, and simulate the target's behavioral changes in different environments; 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 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 based on 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 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; The signal processing module is used to 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. By simulating the target's reflection, transmission, and reception signals, the signal amplitude, frequency, and phase are adjusted to generate a radio waveform signal that meets the detection conditions of the external test equipment. The simulated target generation module is used to input the generated simulated target signal into the external test equipment. First, the target characteristic parameters that meet the detection conditions of the external test equipment are screened out. Then, the target characteristic parameters are synthesized according to the signal format that the external test equipment can receive and process, and a simulated target that can be detected on the external test equipment is generated.

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