A method, device, medium and product for measuring parameters of micro explosive detonation

Abstract

The application discloses a micro explosive detonation parameter measurement method, device, medium and product, relates to the technical field of detonation parameter measurement, and the method comprises the following steps: acquiring the interface velocity and takeoff time when an impact wave generated by a detonation reaction of an explosive layer in each sample in a sample sequence passes through an explosive layer-window material layer interface, obtaining an interface velocity sequence and a takeoff time sequence; and determining detonation parameters according to the interface velocity sequence and the takeoff time sequence. The strong laser driven high-pressure loading mode can complete the measurement of the detonation parameters of the micro explosive, thereby providing technical support for explosive design improvement and performance evaluation.

Description

Technical Field

[0001] This application relates to the field of detonation parameter measurement technology, and in particular to a method, equipment, medium and product for measuring the detonation parameters of a trace explosive. Background Technology

[0002] Detonation parameters are the most important performance parameters of explosives. Currently, macroscopic experiments can obtain accurate measurement results of detonation parameters for samples at the g level and above. New synthetic explosives are limited by production scale, scale-up processes, and safety assessments, allowing only trace amounts of samples to be produced. This makes it difficult to meet the requirements for macroscopic performance testing, resulting in the inability to directly obtain detonation parameters and severely restricting explosive design improvements and performance evaluations. The difficulty in measuring the detonation parameters of trace explosives lies in the fact that current low-to-medium pressure initiation methods involve a detonation growth distance and a detonation reaction zone of a certain width, making the sample size insufficient for detonation parameter testing.

[0003] Currently, numerous studies have been conducted on the testing of detonation parameters for small-scale explosives, resulting in the proposal of several testing methods and the development of corresponding models and theories. For example, several research institutions have explored laser-induced plasma waves to measure gas shock wave velocity and characteristic emission spectra in the absence of effective detonation, indirectly deriving detonation parameters—a novel approach. However, how to accurately obtain detonation parameters under small sample conditions remains an open research topic. Summary of the Invention

[0004] The purpose of this application is to provide a method, equipment, medium, and product for measuring the detonation parameters of micro-explosives, which can complete the measurement of detonation parameters of micro-explosives, thereby providing technical support for the improvement of explosive design and performance evaluation.

[0005] To achieve the above objectives, this application provides the following solution:

[0006] In a first aspect, this application provides a method for measuring the detonation parameters of a trace explosive, which is applied to a device for measuring the detonation parameters of a trace explosive, the device comprising: a laser, a velocity meter and a sample clamping device;

[0007] The sample clamping device is used to clamp the sample; the sample includes a metal foil, an explosive layer and a window material layer arranged sequentially from top to bottom;

[0008] The laser is used to ablate the metal foil of the sample by driving a high-pressure loading method with a strong laser to form a shock wave that passes through the metal foil-explosive layer interface and is loaded onto the explosive layer, causing the explosive layer to undergo a detonation reaction.

[0009] The velocity meter is used to obtain the interface velocity and takeoff time when the shock wave generated by the detonation reaction passes through the interface of the explosive layer-window material layer;

[0010] The method for measuring the detonation parameters of the micro-explosive includes:

[0011] Prepare a sample sequence; the thickness of the explosive layer in all samples of the sample sequence is an arithmetic progression.

[0012] The interface velocity and take-off time of the shock wave generated by the detonation reaction of the explosive layer in each sample within the sample sequence are obtained when the shock wave crosses the interface between the explosive layer and the window material layer, thus obtaining the interface velocity sequence and the take-off time sequence.

[0013] The detonation parameters are determined based on the interface velocity sequence and the takeoff time sequence.

[0014] Optionally, the material of the window material layer is lithium fluoride.

[0015] Optionally, the detonation parameters include detonation velocity and detonation pressure.

[0016] Optionally, the detonation parameters are determined based on the interface velocity sequence and the takeoff time sequence, including:

[0017] Determine the detonation velocity based on the aforementioned sequence of takeoff times;

[0018] The burst pressure is determined based on the interface velocity sequence.

[0019] Optionally, determining the detonation velocity based on the jump time sequence includes:

[0020] Let the iteration number i be greater than 1;

[0021] The i-th sample in the sample sequence is determined as the current sample;

[0022] The sample preceding the current sample in the sample sequence is identified as the comparison sample.

[0023] The difference between the start time of the current sample and the start time of the comparison sample is determined as the current time difference;

[0024] The thickness difference ΔL is determined based on the sample sequence;

[0025] The ratio of the thickness difference ΔL to the current time difference is determined as the detonation velocity of the current sample.

[0026] Optionally, determining the burst pressure based on the interface velocity sequence includes:

[0027] The explosion pressure is obtained by using the interface velocity as an input value through the impedance matching relationship between the explosive and the window material.

[0028] Secondly, this application provides a computer device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the above-described method for measuring the detonation parameters of micro-explosives.

[0029] Thirdly, this application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the above-described method for measuring the detonation parameters of micro-explosives.

[0030] Fourthly, this application provides a computer program product, including a computer program that, when executed by a processor, implements the above-described method for measuring the detonation parameters of micro-explosives.

[0031] According to the specific embodiments provided in this application, the following technical effects are disclosed:

[0032] This application provides a method, equipment, medium, and product for measuring the detonation parameters of micro-explosives. It utilizes high-pressure loading technology driven by a strong laser to measure the detonation parameters of micro-explosives, achieving the detonation reaction state of conventional explosives instantaneously, significantly reducing the detonation growth distance. Simultaneously, it offers advantages such as sample size on the millimeter scale and high diagnostic accuracy, providing a new approach for measuring the detonation parameters of micro-explosives. Compared to existing laser-induced plasma wave methods, this method enables the explosive to form an effective detonation, and experimental verification demonstrates the feasibility and effectiveness of this approach. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram illustrating the working principle of a micro-explosive detonation parameter measuring device according to one embodiment of this application;

[0035] Figure 2 This is a flowchart of a method for measuring detonation parameters of a small amount of explosive in one embodiment of this application;

[0036] Figure 3 This is a schematic diagram of detonation results with different explosive thicknesses in one embodiment of this application;

[0037] Figure 4 This is a schematic diagram of the structure of a computer device provided in an embodiment of this application. Detailed Implementation

[0038] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0039] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0040] In one exemplary embodiment, a method for measuring detonation parameters of micro-explosives is provided. This method utilizes a high-pressure loading mode driven by a high-intensity laser to generate loading conditions with a very thin loading width and pressure reaching the detonation state, which are applied to a mg-level explosive sample to induce a detonation reaction. A high-time-resolution velocimeter is used to measure the back-interface velocity and detonation moment of the explosive. Through numerical calculations, characteristic parameters such as detonation velocity and detonation pressure of the explosive are given. This method for measuring detonation parameters of micro-explosives is applied to a micro-explosive detonation parameter measuring device, such as… Figure 1 The device for measuring the detonation parameters of micro-explosives includes: a laser, a velocity meter, and a sample clamping device (not shown in the figure).

[0041] The sample clamping device is used to hold the sample. The sample consists of a metal foil, an explosive layer, and a window material layer arranged sequentially from top to bottom. The window material layer is made of lithium fluoride.

[0042] The laser is used to ablate the metal foil of the sample by driving a high pressure with a strong laser to form a shock wave that passes through the metal foil-explosive layer interface and is loaded onto the explosive layer, causing the explosive layer to detonate.

[0043] High-pressure loading driven by a powerful laser is employed to create loading conditions that result in an extremely thin loading width and pressure reaching a detonation state. A high-energy nanosecond laser is used to ablate the metal foil, with laser energy exceeding hundreds of joules. After the loading beam is smoothed, the light intensity is uniformly distributed, the beam diameter is ≥2mm, and the power density is 10-1. 12 W / cm 2The above describes a process where a strong shock wave is generated within the metal through laser ablation, with an impact loading pressure in the tens of GPa. This shock wave penetrates the metal / explosive interface and is applied to the explosive sample. High pressure is applied to a mm-sized explosive sample to induce a detonation reaction. The sample mainly consists of a three-layer structure: a metal foil, the explosive, and a window material. The main function of the metal foil is to generate ultra-high loading pressure through laser ablation while avoiding the effects of laser preheating. The explosive sample has a diameter of several millimeters and a thickness of about 1 mm, ensuring that the loading process meets one-dimensional loading conditions. The window material, typically lithium fluoride, primarily ensures that the velocimeter can measure a valid signal, providing the interface velocity history as the shock wave crosses the sample / lithium fluoride interface. Fluid dynamics software is used to simulate and design laser loading parameters and sample parameters, specifying the loading pressure and width of the sample to ensure that the loading pressure reaches the detonation state.

[0044] The velocity meter is used to obtain the interface velocity and takeoff time when the shock wave generated by the detonation reaction crosses the interface between the explosive layer and the window material layer.

[0045] The interface velocity and launch time of the explosive / window material are measured using a high-time-resolution velocimeter. High spatiotemporal resolution velocimetry, typically achieved using a photonic Doppler interferometer, is employed, with a velocity range of 0–10 km / s and a time resolution better than 5 ns. Measuring the interface velocity and launch time of the explosive / window material after detonation provides data for detonation parameter analysis. Loading experiments on non-explosive samples are conducted under identical conditions, and the results are compared between explosive and non-explosive samples to clarify that the velocity difference is due to the explosive detonation, rather than the pressure waveform of the shock wave.

[0046] like Figure 2 Methods for measuring detonation parameters of trace explosives include:

[0047] Step 201: Prepare the sample sequence. The thickness of the explosive layer in all samples in the sample sequence follows an arithmetic progression.

[0048] Step 202: Obtain the interface velocity and take-off time when the shock wave generated by the detonation reaction of the explosive layer in each sample in the sample sequence crosses the interface between the explosive layer and the window material layer, and obtain the interface velocity sequence and take-off time sequence.

[0049] Step 203: Determine the detonation parameters based on the interface velocity sequence and the launch time sequence. The detonation parameters include detonation velocity and detonation pressure.

[0050] Step 203 includes:

[0051] Step 203-1: Determine the burst speed based on the sequence of takeoff times.

[0052] Step 203-2: Determine the detonation pressure based on the interface velocity sequence. The detonation pressure is obtained by using the interface velocity as input value through the impedance matching relationship between the explosive and the window material.

[0053] Step 203-1 includes:

[0054] Step 203-1-1: Let the iteration number i be greater than 1.

[0055] Step 203-1-2: Determine the i-th sample in the sample sequence as the current sample.

[0056] Step 203-1-3: Determine any sample preceding the current sample in the sample sequence as the alignment sample.

[0057] Step 203-1-4: Determine the difference between the start time of the current sample and the start time of the comparison sample as the current time difference.

[0058] Step 203-1-5: Determine the thickness difference ΔL based on the sample sequence.

[0059] Step 203-1-6: Determine the ratio of the thickness difference ΔL to the current time difference as the detonation velocity of the current sample.

[0060] The detonation velocity and detonation pressure of the explosive are calculated and given. Through experiments with explosives of varying thicknesses, the detonation time for different thicknesses under high pressure is determined. The detonation velocity parameters are given using the calculation method: velocity = thickness difference / time difference. The results are as follows: Figure 3 , Figure 3 The analysis velocity was 7.1 km / s. Using the impedance matching relationship between the explosive and the window material, and with the experimentally measured interface velocity as input, the detonation pressure parameters were determined.

[0061] This embodiment utilizes a high-pressure loading method driven by a high-power laser to conduct precise measurements of detonation parameters of micro-explosives, offering unique advantages: 1) The loading pressure can reach up to 100 GPa. After loading, the explosive directly reaches a high-pressure reaction state, significantly reducing the detonation growth distance. 2) The loading zone is extremely thin. High-power laser ablation of aluminum foil generates transient high pressure, allowing the explosive to directly enter the detonation reaction zone after high-pressure loading, solving the difficulty in calibrating the state parameters of the reaction zone. 3) Laser experimental samples are on the order of millimeters, providing high diagnostic accuracy.

[0062] This application also provides an application scenario in which the above-described method for measuring detonation parameters of trace explosives is applied. Specifically, the method for measuring detonation parameters of trace explosives provided in this embodiment can be applied in explosive design scenarios. Explosive design scenarios include explosive design and production stages, explosive performance evaluation stages, and explosive design scheme optimization stages; the method for measuring detonation parameters of trace explosives provided in this embodiment belongs to the detonation parameter determination stage within the explosive performance evaluation stage.

[0063] In one exemplary embodiment, a computer device is provided, which may be a server or a terminal, and its internal structure diagram may be as follows. Figure 4 As shown, this computer device includes a processor, memory, input / output (I / O) interfaces, and a communication interface. The processor, memory, and I / O interfaces are connected via a system bus, and the communication interface is also connected to the system bus via the I / O interfaces. The processor provides computational and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system, computer programs, and a database. The internal memory provides the environment for the operating system and computer programs stored in the non-volatile storage media. The I / O interfaces are used for exchanging information between the processor and external devices. The communication interface is used for communicating with external terminals via a network connection. When the computer program is executed by the processor, it implements a method for measuring the detonation parameters of a micro-explosive.

[0064] Those skilled in the art will understand that Figure 4 The structures shown are merely block diagrams of some structures related to the present application and do not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than shown in the figures, or combine certain components, or have different component arrangements. In an exemplary embodiment, a computer device is provided, including a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the steps in the above-described method embodiments.

[0065] In one exemplary embodiment, a computer-readable storage medium is provided storing a computer program that, when executed by a processor, implements the steps in the above-described method embodiments.

[0066] In one exemplary embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps in the above-described method embodiments.

[0067] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data must comply with relevant regulations.

[0068] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM).

[0069] The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0070] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0071] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A method for measuring detonation parameters of trace explosives, characterized in that, The method for measuring the detonation parameters of micro explosives is applied to a device for measuring the detonation parameters of micro explosives, which includes a laser, a velocity meter, and a sample clamping device. The sample clamping device is used to clamp the sample; the sample includes a metal foil, an explosive layer and a window material layer arranged sequentially from top to bottom; The laser is used to ablate the metal foil of the sample by driving a high-pressure loading method with a strong laser to form a shock wave that passes through the metal foil-explosive layer interface and is loaded onto the explosive layer, causing the explosive layer to undergo a detonation reaction. The velocity meter is used to obtain the interface velocity and takeoff time when the shock wave generated by the detonation reaction passes through the interface of the explosive layer-window material layer; The method for measuring the detonation parameters of the micro-explosive includes: Prepare a sample sequence; the thickness of the explosive layer in all samples of the sample sequence is an arithmetic progression. The interface velocity and take-off time of the shock wave generated by the detonation reaction of the explosive layer in each sample within the sample sequence are obtained when the shock wave crosses the interface between the explosive layer and the window material layer, thus obtaining the interface velocity sequence and the take-off time sequence. The detonation parameters are determined based on the interface velocity sequence and the takeoff time sequence. Based on the interface velocity sequence and the takeoff time sequence, the detonation parameters are determined, including: Determine the detonation velocity based on the aforementioned sequence of takeoff times; Determine the burst pressure based on the interface velocity sequence; Determining the detonation velocity based on the aforementioned jump time sequence includes: Let the iteration number i be greater than 1; The i-th sample in the sample sequence is determined as the current sample; The sample preceding the current sample in the sample sequence is identified as the comparison sample. The difference between the start time of the current sample and the start time of the comparison sample is determined as the current time difference; The thickness difference ΔL is determined based on the sample sequence; The ratio of the thickness difference ΔL to the current time difference is determined as the detonation velocity of the current sample; Determining the burst pressure based on the interface velocity sequence includes: The explosion pressure is obtained by using the interface velocity as an input value through the impedance matching relationship between the explosive and the window material.

2. The method for measuring detonation parameters of micro-explosives according to claim 1, characterized in that, The material of the window material layer is lithium fluoride.

3. The method for measuring detonation parameters of trace explosives according to claim 1, characterized in that, The detonation parameters include detonation velocity and detonation pressure.

4. A computer device, comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that the processor executes the computer program to implement the method for measuring the detonation parameters of a trace explosive as described in any one of claims 1-3.

5. A computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the computer program implements the method for measuring the detonation parameters of micro-explosives as described in any one of claims 1-3.

6. A computer program product, comprising a computer program, characterized in that, When executed by a processor, the computer program implements the method for measuring the detonation parameters of micro-explosives as described in any one of claims 1-3.

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