Three-dimensional visual detection method for solid rocket engine wreckage

Abstract

The invention discloses a solid rocket engine wreckage three-dimensional visual detection method. The method comprises the following steps: acquiring wreckage surface point cloud data by using a three-dimensional laser scanning technology to obtain the boundary dimension of wreckage; non-destructively detecting the residual thickness of a wreckage heat insulation layer by using an ultrasonic detection technology; analyzing the internal morphology of key parts of the wreckage through a digital ray imaging technology, and fusing the boundary dimension of the wreckage, the residual thickness of a heat insulation layer and the internal morphology to form a three-dimensional visual model containing comprehensive information of the wreckage; according to the invention, comprehensive and accurate detection and visual analysis of the wreckage can be realized by fusing a plurality of tip detection technologies.

Description

Technical Field

[0001] The invention belongs to the technical field of solid rocket engine detection, and in particular relates to a three-dimensional visualization detection method for solid rocket engine debris. Background Art

[0002] As the core component of the spacecraft propulsion system, the stability and reliability of the performance of solid rocket engines are directly related to the success or failure of the entire space mission. Therefore, comprehensive performance evaluation and accurate failure analysis of solid rocket engines have become a key link in ensuring the safety and efficiency of space activities.

[0003] However, in the face of complex aerospace engineering requirements and increasingly stringent inspection standards, traditional inspection methods have gradually revealed their limitations. These methods often rely on contact measurement, destructive testing or low-resolution imaging technology, which not only have the problem of insufficient accuracy, but also take a long time, low efficiency, and may even cause irreversible damage to precious wreckage samples, thus limiting the possibility of subsequent in-depth analysis and reuse.

[0004] In order to overcome these difficulties and meet the needs of modern aerospace engineering for efficient, non-destructive and high-precision testing, it is particularly important to develop a new testing method. This new method should be able to integrate high-precision measurement, non-contact operation and multi-dimensional comprehensive analysis to achieve all-round and refined testing of solid rocket engine debris from external dimensions to internal structure, from surface defects to deep damage. Summary of the invention

[0005] In view of this, the present invention provides a three-dimensional visualization detection method for solid rocket engine debris, which can achieve comprehensive and accurate detection and visualization analysis of the debris by integrating multiple cutting-edge detection technologies.

[0006] The technical solution for implementing the present invention is as follows:

[0007] A three-dimensional visualization detection method for solid rocket engine wreckage uses three-dimensional laser scanning technology to obtain surface point cloud data of the wreckage to obtain the outer dimensions of the wreckage; ultrasonic detection technology is used to non-destructively detect the remaining thickness of the wreckage's insulation layer; digital radiographic technology is used to analyze the internal morphology of key parts of the wreckage, and the three parts of data, namely the outer dimensions of the wreckage, the remaining thickness of the insulation layer, and the internal morphology, are integrated to form a three-dimensional visualization model containing comprehensive information about the wreckage.

[0008] Furthermore, the three-dimensional laser scanning technology obtains a point cloud model of the wreckage surface, and after the point cloud model is filtered, denoised, and registered, the point cloud is encapsulated to generate a point cloud model of the wreckage.

[0009] Furthermore, the ultrasonic detection technology measures the remaining thickness of the insulation layer at equal intervals along the axial direction of the wreckage and analyzes the change in the thickness of the insulation layer.

[0010] Furthermore, the solid rocket engine wreckage is decomposed by water jet cutting technology to obtain samples of key parts, and the digital radiography technology is used to measure its internal morphology.

[0011] Furthermore, the digital radiographic imaging technology generates high-resolution internal images by transmitting X-rays through the object to be measured and receiving and processing the transmission signals, which are used for visual analysis of the internal structure of the wreckage.

[0012] Beneficial effects:

[0013] 1. The detection system of the present invention integrates three technologies: three-dimensional laser scanning, ultrasonic detection and digital radiography, and realizes data collection, processing and fusion through a unified control platform and data processing system.

[0014] 2. The present invention is an efficient and comprehensive method for detecting solid rocket engine debris.

[0015] 3. The method of the present invention can integrate high-precision measurement, non-contact operation and multi-dimensional comprehensive analysis to achieve all-round and refined detection of solid rocket engine debris from external dimensions to internal structure, from surface defects to deep damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a detection flow chart of the present invention.

[0017] Figure 2 This is a 3D laser scanning 3D measurement result diagram of the present invention.

[0018] Figure 3 This is a diagram of the measurement results of the 3D laser scanning circumferential 2D cross section of the present invention.

[0019] Figure 4 This is a diagram of the measurement results of the axial 2D cross section of the three-dimensional laser scanning of the present invention.

[0020] Figure 5 Schematic diagram of digital radiographic detection of the present invention; (a) is the digital anatomical position, and (b) is the internal morphology information of the cross section. DETAILED DESCRIPTION

[0021] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0022] The present invention provides a three-dimensional visualization detection method for solid rocket engine debris, such as Figure 1 As shown, the specific process includes the following:

[0023] Install the 3D laser scanner, ultrasonic testing device and digital radiographic imaging equipment on the testing platform according to the predetermined layout to ensure that the relative positions of the various devices are accurate.

[0024] Calibrate each detection equipment, including the accuracy calibration of the laser scanner, the frequency and sensitivity adjustment of the ultrasonic probe, and the intensity calibration of the X-ray source, to ensure the accuracy and reliability of the detection data.

[0025] The solid rocket engine wreckage after the test run is disassembled into components.

[0026] The solid rocket engine wreckage to be inspected is preliminarily cleaned to remove surface dirt and attachments for better scanning and inspection.

[0027] The solid rocket engine debris is placed in the 3D laser scanning inspection station, and the 3D laser scanner is started to emit a laser beam to the surface of the debris. The laser beam forms a light spot on the surface of the debris, and the distance from the light spot to the scanner is measured by receiving the reflected signal.

[0028] The processing unit inside the scanner converts the received distance information into point cloud data, and performs filtering, denoising and registration processing through algorithms to ultimately generate a point cloud model of the wreckage.

[0029] Import the wreckage point cloud model into the dimensional analysis and measurement software, directly establish features on the wreckage surface or perform 3D comparative analysis and measurement after comparing with the design model, and establish several measurement sections along the axial and circumferential directions of the wreckage for 2D comparative analysis and measurement.

[0030] Figure 2 This is the 3D measurement result diagram of the three-dimensional laser scanning of the present invention. The wreckage point cloud model is registered with the design model, and a 3D comparative analysis is performed after registration. The deviation between the two is displayed by different colors. Among them, the warm color is the protruding part of the point cloud model compared with the design model. The redder the color, the greater the deviation; the cold color is the concave part of the point cloud model compared with the design model. The bluer the color, the greater the deviation; the green part is the part where the deviation between the two is not large. The deviation range can be set (the threshold of the green area in the figure is

[0031] ±0.5mm).

[0032] Figure 3 This is the 3D laser scanning circumferential 2D cross-section measurement result diagram of the present invention. The 2D cross-section measurement can be realized through the digital dissection of the point cloud model. In the diagram, the axis of the nozzle wreckage is used as the rotation axis to establish a circumferential section. According to the measurement requirements, the measuring points at different axial positions are located to measure the wall thickness at the point.

[0033] Figure 4This is the axial 2D cross-sectional measurement result diagram of the three-dimensional laser scanning of the present invention. In the diagram, after the wreckage point cloud model is registered with the design model, a measurement section is established at a certain position along the axial direction away from the reference plane, and the deviation value between the point cloud model and the design model at the section is measured.

[0034] Place the ultrasonic testing device (including the probe and coupling agent) on the surface of the wreckage, ensuring that the probe is in close contact with the insulation layer.

[0035] The high-frequency sound waves are transmitted into the insulation layer, and the reflected sound wave signals are received. The remaining thickness of the insulation layer is calculated by measuring the propagation time and speed of the sound waves.

[0036] Measure at equal intervals along the specified location and repeat the measurement at multiple test points to obtain the average value and distribution of the insulation layer thickness.

[0037] Use water jet cutting equipment to decompose the solid rocket engine wreckage and obtain samples from key parts.

[0038] Aim the X-ray source at the key inspection area sample of the wreckage and turn on the ray emitting device.

[0039] After X-rays pass through the object being measured, they are captured by the receiving device and converted into digital signals. The signals are processed by image processing algorithms to generate high-resolution internal images.

[0040] Figure 5 Schematic diagram of digital radiographic detection of the present invention. In the figure, a wreck sample is subjected to digital radiographic detection to obtain a three-dimensional model. The model contains information on the surface and internal morphology of the wreck. The internal morphology at any position of the wreck is obtained through digital dissection. Figure 5 (a) is the digital anatomical position, Figure 5 (b) is the internal morphology information of the section.

[0041] Perform post-processing operations such as image enhancement and filtering to highlight internal defects such as cracks and cavities.

[0042] The surface data obtained by 3D laser scanning, the insulation layer thickness data obtained by ultrasonic testing, and the internal image data obtained by digital radiography are imported into a unified data processing platform. These data are fused and processed using 3D modeling software and visualization technology to form a comprehensive 3D visualization model that includes the wreckage's shape, internal structure, and insulation layer thickness.

[0043] Conduct in-depth analysis on the fused 3D visualization model to assess the overall condition of the wreckage, failure causes, and potential risks.

[0044] Prepare a detailed test report based on the analysis results, including test data, analysis results, recommended measures, etc., to provide data support for subsequent performance evaluation and optimized design.

[0045] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A three-dimensional visualization detection method for solid rocket engine debris, characterized in that: Use 3D laser scanning technology to obtain point cloud data on the wreckage's surface to get the wreckage's external dimensions. Use ultrasonic testing technology to non-destructively detect the remaining thickness of the wreckage's insulation layer. Use digital radiographic technology to analyze the internal morphology of key parts of the wreckage. The three parts of data, namely the wreckage's external dimensions, the remaining thickness of the insulation layer, and the internal morphology, are fused to form a 3D visual model that contains comprehensive information about the wreckage.

2. The three-dimensional visualization detection method according to claim 1, characterized in that: The three-dimensional laser scanning technology obtains a point cloud model of the wreckage surface. After the point cloud model is filtered, denoised, and registered, the point cloud is packaged to generate a point cloud model of the wreckage.

3. The three-dimensional visualization detection method according to claim 2, characterized in that: The ultrasonic detection technology measures the remaining thickness of the insulation layer at equal intervals along the axial direction of the wreckage and analyzes the change in the thickness of the insulation layer.

4. The three-dimensional visualization detection method according to any one of claims 1 to 3, characterized in that: The solid rocket engine wreckage is decomposed by water jet cutting technology to obtain samples of key parts, and the digital radiography technology is used to measure its internal morphology.

5. The three-dimensional visualization detection method according to claim 1, characterized in that: The digital radiography technology generates high-resolution internal images by transmitting X-rays through the object to be tested and receiving and processing the transmission signals, which are used for visual analysis of the internal structure of the wreckage.

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