Multi-parameter collaborative testing device and method for liquid explosive combustion-to-detonation process

Abstract

The invention relates to the technical field of liquid explosive performance testing, and discloses a multi-parameter collaborative testing device and method for a liquid explosive combustion-to-detonation process, a DDT tube is a transparent tube body with one open end, a cavity is formed in the DDT tube and used for being filled with a liquid explosive, a plurality of through holes are formed in the tube wall of the DDT tube at intervals in the axial direction, and the through holes are communicated with the DDT tube. The through hole is communicated with the cavity, an electric probe is assembled in the through hole, the support is used for fixing the DDT tube, a steel block in contact with the closed end of the DDT tube is arranged at the bottom of the support and used for testing the axial output capacity of the liquid explosive in the DDT tube, and the ignition mechanism is used for igniting the liquid explosive in the cavity; the multi-parameter test and analysis system comprises a camera shooting acquisition unit, an electric probe data acquisition unit and a power supply, the fundamental problems of adaptability and safety of liquid explosive testing are solved, synchronous acquisition and fusion analysis of multi-dimensional data are realized, the accuracy and reliability of a test result are greatly improved, and the test efficiency is improved. And the test efficiency and economy are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of liquid explosive performance testing, in particular to a multi-parameter cooperative testing device and method for combustion to detonation transition process of liquid explosive. BACKGROUND

[0002] Deflagration to detonation transition (DDT) is a key phenomenon in the energy release process of energetic materials. The study of its mechanism and parameters is of great significance in the performance evaluation, safety design and development of new energetic materials. Existing DDT research devices and methods are mainly established around solid and gas explosives, which have significant defects when facing liquid explosives: Poor device adaptability: Traditional DDT test tubes are mostly open or semi-open structures placed horizontally. Liquid explosives cannot be stably and densely packed in such tubes due to their inherent fluidity, which can easily cause overflow during packing and sealing, affecting the accuracy of the charge and posing a serious safety hazard.

[0003] Low test safety: Liquid explosives generally have high sensitivity. In the traditional packing method, mechanical operations such as closing the tube opening can easily cause accidental stimulation of the explosive, inducing premature reaction, directly threatening the safety of test personnel and equipment.

[0004] Single and limited test means: The current test methods have the following shortcomings: Witness plate method: relies on subjective judgment and lacks quantitative standards.

[0005] Electric probe method: Although it can measure the speed quantitatively, the results are not intuitive, and the accuracy is affected by the arrangement of the probe and the quality of signal collection.

[0006] High-speed camera method: can record the process, but requires transparent tube and it is difficult to provide accurate blast pressure data alone.

[0007] More importantly, these methods usually require different device configurations and cannot be implemented simultaneously in a single test. This results in single-dimensional data, which cannot be checked among different parameters, limiting the accuracy and reliability of the overall test results, and increasing the number of tests and the amount of explosives, further amplifying the safety risks. SUMMARY

[0008] The purpose of the present application is to provide a multi-parameter cooperative testing device and method for combustion to detonation transition process of liquid explosive, which aims to solve or improve at least one of the above technical problems.

[0009] To achieve the above purpose, the present application provides the following scheme: the present application provides a multi-parameter cooperative testing device and method for combustion to detonation transition process of liquid explosive, comprising: The testing mechanism includes a DDT tube, a support, and an ignition mechanism. The DDT tube is a transparent tube with one open end. The DDT tube has an internal cavity for filling with liquid explosive. The tube wall of the DDT tube has multiple through holes spaced apart along the axial direction. The through holes are connected to the cavity and are used to assemble electrical probes. The support is used to fix the DDT tube so that the DDT tube is in a vertical position with the open end facing upward. The bottom of the support is provided with a steel block that contacts the closed end of the DDT tube for testing the axial output capability of the liquid explosive in the DDT tube. The ignition mechanism is used to ignite the liquid explosive in the cavity. The multi-parameter testing and analysis system includes a camera acquisition unit, an electrical probe data acquisition unit, and a power supply, used to synchronously acquire, process, and analyze multi-dimensional data during the DDT process.

[0010] Optionally, it also includes an explosion-proof enclosure for housing the testing mechanism.

[0011] Optionally, the bracket includes a pair of screws, an upper steel plate, a lower steel plate, a base, and eight fixing nuts. The pair of screws are fixedly connected to the base. The upper steel plate and the lower steel plate are each provided with sliding through holes for sliding cooperation with the screws and are fixed in position by the eight fixing nuts. The steel block is provided between the lower steel plate and the base, and the DDT tube is fixed between the upper steel plate and the lower steel plate.

[0012] Optionally, the lower steel sheet has a central through hole to avoid the DDT tube.

[0013] Optionally, the ignition mechanism includes an ignition end cap connected to the DDT tube, an ignition device embedded in the ignition end cap, the ignition device being used to ignite the liquid explosive in the DDT tube, and a lead wire hole being provided on the ignition end cap for the lead wire of the ignition device to be led out.

[0014] Optionally, the outer wall of the DDT tube is provided with graduations.

[0015] Optionally, the camera acquisition unit includes a high-speed camera and high-speed camera data acquisition software connected to it.

[0016] Optionally, the electrical probe data acquisition unit includes a multi-channel data acquisition instrument and an electrical probe velocity measurement system connected together.

[0017] Optionally, the multi-parameter testing and analysis system also includes a synchronization trigger connected to the lead wire of the ignition device.

[0018] This invention also provides a multi-parameter coordinated testing method for the combustion-to-detonation process of liquid explosives, comprising the following steps: Test preparation includes assembling the bracket, DDT tube, and ignition mechanism, and adjusting them to the test-ready state; During process testing, the ignition mechanism, camera acquisition unit, and electrical probe data acquisition unit are activated to simultaneously record multi-dimensional data during the DDT process. Data processing and analysis: Comprehensive processing and analysis of witness board data, steel block indentation data, high-speed camera data, and electric probe speed measurement data; Results judgment and presentation: Based on the processed data, comprehensively judge the combustion-to-detonation state of the sample and give the actual detonation velocity and detonation pressure values ​​of the sample.

[0019] The present invention discloses the following technical effects: This invention, through the adoption of a vertical, bottom-closed, top-loaded transparent DDT tube design, perfectly matches the physical characteristics of liquid explosives, achieving safe, convenient, and precise loading. It fundamentally avoids the risks of leakage and mechanical stimulation during the loading process, providing a feasible basic platform for DDT research on liquid explosives and solving the fundamental problems of adaptability and safety in liquid explosive testing.

[0020] This invention innovatively integrates four methods—witness plate criterion, steel concave burst pressure test, high-speed video recording, and electrical probe precise velocity measurement—into a single device and a single test. This four-in-one testing mode can simultaneously acquire multi-dimensional information such as morphological damage, pressure output, visual process, and wave velocity changes, transforming the test results from a single-point description to a panoramic reproduction, and realizing the synchronous acquisition and fusion analysis of multi-dimensional data.

[0021] This invention effectively overcomes the errors or misjudgments that may exist with a single method by cross-validating and co-interpreting conclusions obtained from four independent methods. For example, electrical probe data can be calibrated chronologically with high-speed camera images; calculated burst pressure can be correlated with the degree of pipe fragmentation for verification. This cross-validation mechanism greatly enhances the confidence of the final conclusion and significantly improves the accuracy and reliability of the test results.

[0022] This invention can obtain comprehensive data in a single test that previously required multiple different tests, significantly saving precious test samples (liquid explosives), reducing the overall cost of a single test, and reducing the frequency of handling high-risk materials. It meets the requirements of safe and economical scientific research, and improves the efficiency and economy of testing. Attached Figure Description

[0023] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the support structure of the present invention; Figure 3 This is a test criterion diagram of the test specimen detonation after the present invention. Figure 4 This is a diagram illustrating the criteria for identifying steel block dents after sample detonation according to the present invention. Figure 5 This is a high-speed camera image of the sample detonation process according to the present invention. Figure 6 This is a detonation velocity-position curve output by the electric probe velocity measurement system for the sample detonation process of the present invention.

[0024] In the diagram: 1. Bracket; 2. Ignition end cap; 3. Lead wire hole; 4. DDT tube; 5. Through hole; 6. Cavity; 7. Steel block; 8. Fixing nut; 9. Upper steel plate; 10. Screw; 11. Ignition device; 12. Lower steel plate; 13. Base; 14. Explosion-proof box; 15. Testing mechanism; 16. High-speed camera; 17. Multi-channel data acquisition instrument; 18. Electrical probe speed measurement system; 19. Synchronous trigger; 20. High-speed camera data acquisition software; 21. Power supply. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] Reference Figures 1 to 6 This invention provides a multi-parameter coordinated testing device for the combustion-to-detonation process of liquid explosives, comprising: The testing mechanism 15 includes a DDT tube 4, a support 1, and an ignition mechanism. The DDT tube 4 is a transparent tube with one end open. The DDT tube 4 has a cavity 6 inside for filling liquid explosive. The tube wall of the DDT tube 4 has multiple through holes 5 spaced apart along the axial direction. The through holes 5 are connected to the cavity 6 and are used to assemble electric probes. The support 1 is used to fix the DDT tube 4 so that the DDT tube 4 is kept in a vertical position with the open end facing upward. The bottom of the support 1 is provided with a steel block 7 that contacts the closed end of the DDT tube 4 for testing the axial output capability of the liquid explosive in the DDT tube 4. The ignition mechanism is used to ignite the liquid explosive in the cavity 6. The multi-parameter testing and analysis system includes a camera acquisition unit, an electrical probe data acquisition unit, and a power supply 21, which is used to synchronously acquire, process, and analyze multi-dimensional data during the DDT process.

[0028] In one embodiment of the invention, an explosion-proof box 14 for housing the test unit 15 is also included.

[0029] By adding the explosion-proof box 14, it is clarified that the entire test operation must be carried out in a closed explosion-proof environment, emphasizing the standardization of the application scenarios of the device of the present invention as a complete and safe experimental system.

[0030] In one embodiment of the present invention, the bracket 1 includes a pair of screws 10, an upper steel plate 9, a lower steel plate 12, a base 13, and eight fixing nuts 8. The pair of screws 10 are fixedly connected to the base 13. The upper steel plate 9 and the lower steel plate 12 are each provided with sliding through holes for sliding cooperation with the screws 10, and are fixed in position by the eight fixing nuts 8. A steel block 7 is provided between the lower steel plate 12 and the base 13. The DDT tube 4 is fixed between the upper steel plate 9 and the lower steel plate 12.

[0031] Positioning is achieved by fixing nuts 8. This ensures that the height and relative position of the DDT tube 4 and the steel block 7 are adjustable and can be securely locked, giving the bracket 1 good versatility and clamping stability. It can adapt to fixing nuts 8 of different specifications and ensures the stability of the structure under detonation impact, thus ensuring the validity of test data such as the steel indentation depth of the steel block 7.

[0032] In one embodiment of the present invention, a central through hole is provided on the lower steel sheet 12 to avoid the DDT tube 4.

[0033] The central through hole ensures that the DDT tube 4 is vertically aligned, so that the detonation impact force acts axially on the steel block 7, avoiding the impact of off-center load on the accuracy of the steel concave test.

[0034] In one embodiment of the present invention, the ignition mechanism includes an ignition end cap 2 connected to the DDT tube 4, an ignition device 11 embedded in the ignition end cap 2, the ignition device 11 being used to ignite the liquid explosive in the DDT tube 4, and a lead wire hole 3 being provided on the ignition end cap 2 for the lead wire of the ignition device 11 to be led out.

[0035] The ignition device 11 can be pre-installed on the ignition end cap 2, wired in a safe area away from the explosion source, and then quickly assembled with the pre-loaded DDT tube 4, minimizing dangerous operations near the pre-loaded tube.

[0036] In one embodiment of the present invention, a scale is provided on the outer wall of the DDT tube 4.

[0037] For highly sensitive liquid explosives, the charge amount is a key variable affecting the DDT process. Precisely controlling the charge amount by setting a scale is a prerequisite for obtaining comparable and repeatable experimental data.

[0038] In one embodiment of the present invention, the camera acquisition unit includes a high-speed camera 16 and high-speed camera data acquisition software 20 connected to each other.

[0039] In one embodiment of the present invention, the electrical probe data acquisition unit includes a multi-channel data acquisition instrument 17 and an electrical probe velocity measurement system 18 connected together.

[0040] In one embodiment of the present invention, the multi-parameter testing and analysis system further includes a synchronous trigger 19 connected to the lead wire of the ignition device 11. The synchronous trigger 19 has an ignition function and is equipped with a safety lock.

[0041] Furthermore, the screw 10 and the base 13 are made of carbon steel.

[0042] Furthermore, the fixing nut 8 is made of copper to prevent static electricity; the bracket nut is model M8.

[0043] Furthermore, the screw 10 has dimensions of M8×18 cm or longer.

[0044] Furthermore, the base 13 weighs 2 kg or more.

[0045] Furthermore, the material of DDT tube 4 is plexiglass (polymethyl methacrylate); the length of DDT tube 4 is 60 mm, the outer diameter is 10 mm, and the inner diameter is 5 mm.

[0046] Furthermore, the sample loading scale for DDT tube 4 is 57 mm.

[0047] Furthermore, the diameter of each through hole 5 is 0.6 mm, there are 11 holes, and the spacing is 5 mm; the bottom through hole 5 is 5 mm away from the bottom.

[0048] Furthermore, the DDT tube 4 is filled with the drug by pipetting or dripping, and the drug is filled when the liquid level reaches the mark.

[0049] Furthermore, the igniter 11 is an electric igniter with a propellant head size of 4.5 mm × 5 mm.

[0050] Furthermore, the upper steel plate 9 and the lower steel plate 12 are the same size, with openings at both ends. Φ 8.5 sliding through hole; the center through hole size of the lower steel sheet 12 is... Φ 10.5 mm.

[0051] Furthermore, the high-speed camera 16 uses the visible light band, has a storage time of no less than 1.0 s under the conditions of maximum frame rate and maximum resolution, and has an external trigger function that can be used with a fill light.

[0052] After the test mechanism 15 is placed in the explosion-proof box 14, a high-speed camera 16 is used to record the dynamic process of the explosive DDT occurring in the DDT tube 4 through the viewing window. A portable computer with a high-speed camera data acquisition system 20 with triggering function is connected to the camera. Electric probes are sequentially inserted into the through hole 5 of the DDT tube body 4 to record the electric pulse signal for detonation wave velocity measurement. The probe leads are connected to a multi-channel data acquisition instrument 17, which is connected to a portable computer with an electric probe velocity measurement system 18 installed. The ignition device 11 lead in the ignition end cap 2, the high-speed camera data acquisition system 20, and the electric probe velocity measurement system 18 are connected to a synchronous trigger 19 with ignition function to achieve coordinated control. The power supply 21 is used to power all the equipment in the test system.

[0053] This invention also provides a multi-parameter coordinated testing method for the combustion-to-detonation process of liquid explosives, comprising the following steps: I. Test preparation, including assembling bracket 1, DDT tube 4, and ignition mechanism, and adjusting them to the test-ready state. Specifically, this includes: a) Select an open test site to install the explosion-proof box 14. The explosion-proof box 14 should have at least one viewing hole, an explosion relief port, a cable passage, and a certain explosion-proof rating; place the bracket 1 with the assembled steel block 7 into the explosion-proof box 14. b) Set up the high-speed camera 16, turn it on and adjust the placement and lens parameters of the high-speed camera 16, set the shutter speed to 1 / 184000 seconds and the frame rate to 20000 fps / second, adjust the lens position so that the high-speed camera 16 can capture the full length of the DDT tube 4; fix the position of the high-speed camera 16 and its lens parameters. c) Insert electrical probes sequentially into the through hole 5 of DDT tube 4 and leave probe leads. The lead length is long enough to ensure convenient connection of the speed measuring cable. d) Seal the through hole 5 of DDT tube 4 with instant adhesive, and inject anhydrous ethanol into DDT tube 4 to check the sealing of the through micropore. e) Pass the wire of the ignition device 11 through the through hole 3 of the ignition end cap 2, and seal the through hole 3 of the ignition end cap 2 with instant adhesive; use a pipette to fill the sample into the DDT tube 4, install the ignition end cap 2, and then move the DDT tube 4 into the explosion-proof box 14 for fixation. f) Connect the probe pins to the multi-channel data acquisition unit 17 using a speed measurement cable, then connect the output of the multi-channel data acquisition unit 17 and the external trigger of the high-speed camera 16 to the synchronous trigger 20 in sequence, and finally connect the wire of the ignition device 11 in the ignition end cover 2 to the ignition interface of the synchronous trigger 19; debug the high-speed camera data acquisition software 20 and the probe speed measurement system software 18. II. Process Testing: The ignition mechanism, camera acquisition unit, and electrical probe data acquisition unit are activated to simultaneously record multi-dimensional data during the DDT process. Specifically, this includes: Open the ignition fuse of the synchronous trigger 19, press the ignition button, and the electric ignition head explodes to ignite the sample in the DDT tube 4. At the same time, the high-speed camera 16 and the high-speed video data acquisition software 20 and the electric probe velocimetry system 18 start working synchronously. h) The high-speed camera 16 captures the detonation video and transmits it to the high-speed camera data acquisition software 20. The electric probe velocity measurement system 18 captures the multi-probe conduction signal and saves the above data on a portable computer. i) After the sample inside the DDT tube 4 was detonated, the DDT tube 4 was shattered, forming witness fragments with different degrees of fragmentation. The detonation of the sample released axial pressure on the support steel block 7, forming a dent at the steel block. The above data were collected and saved. III. Data Processing and Analysis: Comprehensive processing and analysis of the witness board data, steel block indentation data, high-speed camera data, and electrical probe velocity measurement data. Specifically, this includes: j) The DDT tube 4 witness fragments collected after the test are arranged in order of fragment size and photographed as witness plate data; in particular, the depth of the indentation of the identification steel block 7 is measured as steel block indentation data; the high-speed camera image is used to extract the segment from the appearance of the ignition flame to the end of the detonation as high-speed camera data; the probe conduction signals of each channel of the electric probe velocity measurement system 18 are saved as velocity measurement data.

[0054] k) Witness Panel Data Processing: Determine: ① Whether DDT tube 4 is shattered and scattered; ② Whether the fragments of DDT tube 4 show signs of ablation / melting / cracks / perforation; ③ The maximum size of the fragments of DDT tube 4 is less than 30 mm. If all conditions are met, it is considered detonation; if any conditions are not met, it is considered combustion / deflagration. The witness panel data processing results are as follows: Figure 3 As shown; l) Steel block dent data processing: The depth of the dent on steel block 7 was measured as follows: h The explosive pressure of the sample was calculated using the numerical relationship between the steel concavity and the explosive detonation pressure:

[0055] In equation (4), h This refers to the depth of the steel recess, in mm. p CJThe explosive pressure is expressed in GPa. r e The radius of the charge is in mm; σ s To determine the dynamic elastic limit of a block material, the unit is GPa. σ S When taking the static elastic limit, h To be corrected to h c ,in R Rockwell hardness (B standard) of the steel test block:

[0056] A represents the impact resistance ratio between the explosive and the metal.

[0057] In equation (6), ρ D This refers to the density of the explosive, expressed in g·cm³. -3 ;ρ M The density of the steel sample is given in g·cm³. -3 ; v D This is the theoretical detonation velocity of the explosive at its lowest density, expressed in m / s. -1 ; C M The velocity of sound in the steel test block is expressed in m / s. -1 ; K This is the expansion factor coefficient of the explosive gas. After calculation, the explosion pressure is compared with the theoretical (calculated) explosion pressure of the sample. If the tested explosion pressure reaches 80% of the theoretical explosion pressure, it is considered detonation; otherwise, it is considered deflagration / combustion. The steel block indentation data is as follows: Figure 4 As shown; m) High-speed camera data processing: In the test image sequence, the image of the flame appearing on the igniter 11 is taken as the first frame image, and the image of the detonation wave front reaching the bottom of the DDT tube 4 is taken as the last frame image. The detonation state of the sample is determined by visual information such as the flame and tube fragmentation; the high-speed camera data processing results are as follows: Figure 5 As shown; n) Processing of electrical probe velocity measurement data: The conduction signals of electrical probes at different positions of DDT tube 4 are collected as the arrival time of the detonation wave front. The propagation velocity of the combustion wave or detonation wave in each probe interval is calculated based on the distance between adjacent probes and the time difference of voltage pulse arrival. v f This forms the detonation velocity-position curve. v fi -L , i = 1 ~ n , n Decrease the number of probes by 1 and calculate the detonation transition distance.ΔL By comparing the standard detonation velocity of the sample, if the calculated detonation velocity is not less than 90% of the standard detonation velocity, it is considered detonation; otherwise, it is considered deflagration / combustion. The detonation velocity-position curve of the electrical probe velocity measurement data processing results is as follows: Figure 6 As shown; o) Combine the above four criteria to comprehensively judge the combustion-to-detonation state of the sample; IV. Result Judgment and Presentation: Based on the processed data, comprehensively determine the combustion-to-detonation state of the sample and provide the actual detonation velocity and detonation pressure values ​​of the sample. Specifically, this includes: The sample underwent detonation, deflagration / combustion; The detonation velocity of the sample is v Explosion pressure is p， In this embodiment, the sample detonation velocity was 8304 m / s and the detonation pressure was 17.2 GPa.

[0058] The testing device provided by this invention is fully applicable to the combustion-to-detonation performance testing of insensitive and sensitive liquid explosives, serving as an effective supplement to testing devices for liquid explosives.

[0059] The multi-parameter coordinated testing method for the combustion-to-detonation transition of explosives proposed in this invention is based on a testing device and includes four methods: the witness plate method, the electric probe velocity measurement method, the steel concave test method, and the high-speed camera method. These methods can be carried out simultaneously during the experiment. Among them, the witness plate method and the high-speed camera method serve as qualitative criteria to visually observe the degree of combustion-to-detonation transition of the sample. The electric probe velocity measurement method and the steel concave test method serve as quantitative criteria to judge the progress of combustion-to-detonation transition of the sample by comparing the test detonation velocity and detonation pressure with the standard detonation velocity and detonation pressure of the sample. By combining the four testing methods, a complete combustion-to-detonation criterion is constructed, which effectively improves the accuracy of combustion-to-detonation test results and overcomes the significant drawbacks of traditional single testing methods.

[0060] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0061] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A multi-parameter coordinated testing device for the combustion-to-detonation process of liquid explosives, characterized in that, include: The testing mechanism (15) includes a DDT tube (4), a support (1), and an ignition mechanism. The DDT tube (4) is a transparent tube with one end open. The DDT tube (4) has a cavity (6) inside for filling liquid explosives. The wall of the DDT tube (4) has multiple through holes (5) spaced apart along the axial direction. The through holes (5) are connected to the cavity (6). The through holes (5) are used to assemble electric probes. The support (1) is used to fix the DDT tube (4) so ​​that the DDT tube (4) is kept in a vertical state with the open end facing upward. The bottom of the support (1) is provided with a steel block (7) that contacts the closed end of the DDT tube (4) for testing the axial output capability of the liquid explosive in the DDT tube (4). The ignition mechanism is used to ignite the liquid explosive in the cavity (6). The multi-parameter testing and analysis system includes a camera acquisition unit, an electrical probe data acquisition unit, and a power supply (21), which is used to synchronously acquire, process, and analyze multi-dimensional data during the DDT process.

2. The multi-parameter coordinated testing device for the combustion-to-detonation process of liquid explosives according to claim 1, characterized in that, It also includes an explosion-proof box (14) for housing the test unit (15).

3. The multi-parameter coordinated testing device for the combustion-to-detonation process of liquid explosives according to claim 1, characterized in that, The bracket (1) includes a pair of screws (10), an upper steel plate (9), a lower steel plate (12), a base (13), and eight fixing nuts (8). The pair of screws (10) are fixedly connected to the base (13). The upper steel plate (9) and the lower steel plate (12) are provided with sliding through holes for sliding cooperation with the screws (10) and are fixed in position by the eight fixing nuts (8). The steel block (7) is provided between the lower steel plate (12) and the base (13). The DDT tube (4) is fixed between the upper steel plate (9) and the lower steel plate (12).

4. The multi-parameter coordinated testing device for the combustion-to-detonation process of liquid explosives according to claim 3, characterized in that, The lower steel sheet (12) has a central through hole to avoid the DDT tube (4).

5. The multi-parameter coordinated testing device for the combustion-to-detonation process of liquid explosives according to claim 1, characterized in that, The ignition mechanism includes an ignition end cap (2) connected to the DDT tube (4), an ignition device (11) is embedded in the ignition end cap (2), the ignition device (11) is used to ignite the liquid explosive in the DDT tube (4), and a lead hole (3) is provided on the ignition end cap (2) for the lead wire of the ignition device (11) to be led out.

6. The multi-parameter coordinated testing device for the combustion-to-detonation process of liquid explosives according to claim 1, characterized in that, The outer wall of the DDT tube (4) is marked with graduations.

7. The multi-parameter coordinated testing device for the combustion-to-detonation process of liquid explosives according to claim 1, characterized in that, The camera acquisition unit includes a high-speed camera (16) and high-speed camera data acquisition software (20) connected to each other.

8. The apparatus for multi-parameter coordinated testing of the combustion-to-detonation process of liquid explosives according to claim 1, characterized in that, The electrical probe data acquisition unit includes a multi-channel data acquisition instrument (17) and an electrical probe velocity measurement system (18) connected together.

9. A multi-parameter coordinated testing device for the combustion-to-detonation process of liquid explosives according to claim 5, characterized in that, The multi-parameter testing and analysis system also includes a synchronous trigger (19) connected to the lead wire of the ignition device (11).

10. A method for multi-parameter coordinated testing of the combustion-to-detonation process of liquid explosives, based on the multi-parameter coordinated testing device for the combustion-to-detonation process of liquid explosives as described in any one of claims 1-9, characterized in that, Includes the following steps: Test preparation includes assembling the bracket (1), DDT tube (4) and ignition mechanism, and adjusting them to the test state; During process testing, the ignition mechanism, camera acquisition unit, and electrical probe data acquisition unit are activated to simultaneously record multi-dimensional data during the DDT process. Data processing and analysis: Comprehensive processing and analysis of witness board data, steel block indentation data, high-speed camera data, and electric probe speed measurement data; Results judgment and presentation: Based on the processed data, comprehensively judge the combustion-to-detonation state of the sample and give the actual detonation velocity and detonation pressure values ​​of the sample.

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