Method and device for measuring detonation parameters of trace explosive, medium and product

Abstract

The invention discloses a trace explosive detonation parameter measurement method and device, a medium and a product, and relates to the technical field of detonation parameter measurement, and the method comprises the steps: obtaining an interface speed and a take-off moment when a shock wave generated by an explosive layer detonation reaction in each sample in a sample sequence passes through an explosive layer-window material layer interface, obtaining an interface speed sequence and a take-off time sequence; and determining detonation parameters according to the interface speed sequence and the take-off time sequence. According to the device and the method, trace explosive detonation parameter measurement can be completed in an intense laser driving high-pressure loading mode, so that technical support is provided for explosive design improvement and performance evaluation.

Description

Technical Field

[0001] The present application relates to the technical field of detonation parameter measurement, and in particular to a method, equipment, medium and product for measuring detonation parameters of trace explosives. Background Art

[0002] Detonation parameters are the most important performance parameters of explosives. Currently, macroscopic experiments can obtain accurate measurement results of detonation parameters of samples above g level. New synthetic explosives are limited by production scale, scale-up process and safety assessment, and can only produce trace samples, which makes it difficult to meet the requirements of macroscopic performance testing. As a result, it is impossible to directly obtain detonation parameters, which seriously restricts the design improvement and performance evaluation of explosives. The difficulty in measuring the detonation parameters of trace explosives lies in the fact that the medium and low pressure detonation method is currently used, which has a detonation growth distance and a certain width of the detonation reaction zone, resulting in the sample scale being unable to meet the detonation parameter testing requirements.

[0003] At present, many research and explorations have been carried out on the testing of detonation parameters of small-charge explosives, and some testing methods have been proposed, and corresponding models and theories have been developed. For example, many research units have explored the method of laser-induced plasma waves. In the absence of effective detonation, the gas shock wave velocity and characteristic emission spectrum are measured to indirectly deduce the detonation parameters, which is an innovative attempt. How to accurately obtain detonation parameters under small sample conditions is still 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 trace explosives, which can complete the measurement of the detonation parameters of trace explosives and provide technical support for the design improvement and performance evaluation of explosives.

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

[0006] In a first aspect, the present application provides a method for measuring detonation parameters of trace explosives, the method for measuring detonation parameters of trace explosives is applied to a device for measuring detonation parameters of trace explosives, the device for measuring detonation parameters of trace explosives comprising: a laser, a speedometer 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 in sequence from top to bottom;

[0008] The laser is used to ablate the metal foil of the sample by means of high-intensity laser-driven high-voltage loading to form a shock wave that passes through the metal foil-explosive layer interface and is loaded into the explosive layer, causing the explosive layer to undergo a detonation reaction;

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

[0010] The method for measuring the detonation parameters of trace explosives comprises:

[0011] preparing a sample sequence; wherein the thickness of the explosive layer in all samples in the sample sequence is an arithmetic sequence;

[0012] 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 passes through the interface between the explosive layer and the window material layer, and obtain an interface velocity sequence and a take-off time sequence;

[0013] Detonation parameters are determined according to the interface velocity sequence and the take-off time sequence.

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

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

[0016] Optionally, determining detonation parameters according to the interface velocity sequence and the take-off time sequence includes:

[0017] determining a detonation velocity according to the take-off time sequence;

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

[0019] Optionally, determining the detonation velocity according to the take-off time sequence includes:

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

[0021] Determine that the i-th sample in the sample sequence is the current sample;

[0022] Determine any sample before the current sample in the sample sequence as a comparison sample;

[0023] Determine the difference between the starting time of the current sample and the starting time of the comparison sample as the current time difference;

[0024] Determining a thickness difference ΔL according to 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 explosion pressure according to the interface velocity sequence includes:

[0027] Through the impedance matching relationship between the explosive and the window material, the interface velocity is used as the input value to obtain the detonation pressure.

[0028] In a second aspect, the present application provides a computer device, comprising: 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-mentioned method for measuring detonation parameters of trace explosives.

[0029] In a third aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the above-mentioned method for measuring detonation parameters of trace explosives.

[0030] In a fourth aspect, the present application provides a computer program product, including a computer program, which implements the above-mentioned method for measuring detonation parameters of trace explosives when executed by a processor.

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

[0032] The present application provides a method, device, medium and product for measuring the detonation parameters of trace explosives. The detonation parameters of trace explosives are measured by using a strong laser-driven high-voltage loading technology, which can instantly reach the conventional explosive detonation reaction state, significantly reducing the detonation growth distance. At the same time, the sample size is in the mm level and the diagnostic accuracy is high, providing a new way to measure the detonation parameters of trace explosives. Compared with the existing laser-induced plasma wave method, the explosive can form an effective detonation, and the feasibility and effectiveness of this scheme have been verified through experiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 This is a working principle diagram of a device for measuring detonation parameters of trace explosives in one embodiment of the present application;

[0035] Figure 2 This is a flow chart of a method for measuring detonation parameters of trace explosives in one embodiment of the present application;

[0036] Figure 3 This is a schematic diagram of detonation results of different explosive thicknesses in an embodiment of the present application;

[0037] Figure 4 A schematic diagram of the structure of a computer device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0039] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0040] In an exemplary embodiment, a method for measuring the detonation parameters of trace explosives is provided, which uses a strong laser to drive a high-pressure loading method to generate a loading condition in which the loading width is very thin and the pressure reaches the detonation state, and acts on a mg-level explosive sample to cause a detonation reaction. A high-time-resolution velocity meter is used to measure the rear interface velocity and the take-off time of the explosive. Through numerical calculation, characteristic parameters such as the detonation velocity and detonation pressure of the explosive are given. The method for measuring the detonation parameters of trace explosives is applied to a device for measuring the detonation parameters of trace explosives, such as Figure 1 The device for measuring the detonation parameters of trace explosives includes: a laser, a speed meter and a sample clamping device (not shown in the figure).

[0041] 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 in sequence from top to bottom. The material of the window material layer is lithium fluoride.

[0042] The laser is used to ablate the metal foil of the sample by means of high-intensity laser-driven high-voltage loading to form a shock wave that passes through the metal foil-explosive layer interface and is loaded into the explosive layer, causing the explosive layer to undergo a detonation reaction.

[0043] The high-voltage loading method driven by strong laser is used to generate loading conditions with very thin loading width and pressure reaching the detonation state. The metal foil is ablated by high-energy nanosecond laser, with laser energy above hundreds of joules. After the loading spot beam is smoothed, the light intensity is evenly distributed, the spot diameter is ≥2mm, and the power density is 10 12 W / cm 2Above. A strong shock wave is formed inside the metal through laser ablation. The shock loading pressure is tens of GPa, which penetrates the metal / explosive interface and is loaded onto the explosive sample. High pressure is used to load the mm-level explosive sample and cause it to undergo a detonation reaction. The sample is mainly composed of a three-layer structure including metal foil, explosive, and window material. The main function of the metal foil is to generate ultra-high loading pressure by laser ablation while avoiding the influence of laser preheating effect. The diameter of the explosive sample is several mm and the thickness is about 1 mm, so that the loading process meets the one-dimensional loading conditions. The window material is usually made of lithium fluoride. Its main function is to ensure that the velocity meter can measure effective signals. When the shock wave passes through the sample / lithium fluoride interface, the interface velocity history is measured. Fluid dynamics software is used to simulate and design laser loading parameters and sample parameters, and the loading pressure and width of the sample are given to ensure that the loading pressure reaches the detonation state.

[0044] The velocity meter is used to obtain the interface velocity and take-off time of the shock wave generated by the detonation reaction when it passes through the interface between the explosive layer and the window material layer.

[0045] The interface velocity and take-off time of the explosive / window material are measured using a high time-resolution velocity meter. The velocity is measured with high time-space resolution, usually using a photon Doppler interferometer, with a velocity range of 0 to 10 km / s and a time resolution better than 5 ns. The interface velocity and take-off time of the explosive / window material after the explosive detonates are measured to provide data for the detonation parameter analysis. Loading experiments of non-explosive samples are carried out under the same conditions, and the experimental results of explosive and non-explosive samples are compared to clarify that the velocity difference between the two is caused by the detonation of the explosive, rather than the pressure waveform of the shock wave.

[0046] like Figure 2 , the method for measuring the detonation parameters of trace explosives includes:

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

[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 passes through the interface between the explosive layer and the window material layer, and obtain an interface velocity sequence and a take-off time sequence.

[0049] Step 203: Determine detonation parameters according to the interface velocity sequence and the take-off time sequence. Detonation parameters include detonation velocity and detonation pressure.

[0050] Step 203 includes:

[0051] Step 203-1: Determine the detonation velocity according to the take-off time sequence.

[0052] Step 203-2: Determine the explosion pressure according to the interface velocity sequence. The explosion pressure is obtained by taking the interface velocity as an input value through the impedance matching relationship between the explosive and the window material.

[0053] Step 203-1 includes:

[0054] Step 203-1-1: Set the number of iterations i to be greater than 1.

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

[0056] Step 203-1-3: Determine any sample before the current sample in the sample sequence as a comparison sample.

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

[0058] Step 203-1-5: Determine the thickness difference ΔL according to 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 calculation gives the characteristic parameters of explosive detonation velocity, detonation pressure, etc. Through the experiment of explosives with serial thickness, the starting time of different thicknesses of explosives after high pressure loading is given, and the calculation method of speed = thickness difference / time difference is used to give the detonation velocity parameters. The results are as follows Figure 3 , Figure 3 The analysis speed is 7.1 km / s. Through the impedance matching relationship between the explosive and the window material, the interface velocity measured experimentally is used as the input value to give the detonation pressure parameter.

[0061] This embodiment uses a strong laser to drive high-voltage loading to carry out precise measurement of detonation parameters of trace explosives, which has unique advantages: 1) The loading pressure can be as high as 100 GPa. After loading, the explosive directly reaches a high-voltage reaction state, greatly reducing the detonation growth distance. 2) The width of the loading zone is very thin. Strong laser ablation on aluminum foil can generate transient high voltage. After high-voltage loading, the explosive directly enters the detonation reaction zone, solving the difficulty of calibrating the state parameters of the reaction zone. 3) The laser experimental sample scale is mm-level and the diagnostic accuracy is high.

[0062] The present application also provides an application scenario, which applies the above-mentioned method for measuring detonation parameters of trace explosives. Specifically: the method for measuring detonation parameters of trace explosives provided in this embodiment can be applied in the explosive design scenario. The explosive design scenario includes the explosive design and production link, the explosive performance evaluation link, and the explosive design scheme optimization link; the method for measuring detonation parameters of trace explosives provided in this embodiment belongs to the detonation parameter determination link in the explosive performance evaluation link.

[0063] In an exemplary embodiment, a computer device is provided. The computer device may be a server or a terminal. The internal structure diagram thereof may be as follows: Figure 4 As shown. The computer device includes a processor, a memory, an input / output interface (Input / Output, referred to as I / O) and a communication interface. The processor, the memory and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a method for measuring detonation parameters of trace explosives is implemented.

[0064] Those skilled in the art will understand that Figure 4 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components. In an exemplary embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the steps in the above-mentioned method embodiments when executing the computer program.

[0065] In an exemplary embodiment, a computer-readable storage medium is provided, storing a computer program, and when the computer program is executed by a processor, the steps in the above method embodiments are implemented.

[0066] In an exemplary embodiment, a computer program product is provided, including a computer program, and when the computer program is executed by a processor, the steps in the above method embodiments are implemented.

[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, stored data, displayed data, 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 relevant data must comply with relevant regulations.

[0068] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present 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 may be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM).

[0069] The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. The non-relational database may include a distributed database based on blockchain, etc., but is not limited thereto. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but is not limited thereto.

[0070] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, 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 article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and core ideas of this application. At the same time, for those skilled in the art, according to the ideas of this application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting this application.

Claims

1. A method for measuring detonation parameters of trace explosives, characterized in that: The method for measuring detonation parameters of trace explosives is applied to a device for measuring detonation parameters of trace explosives, and the device for measuring detonation parameters of trace explosives comprises: a laser, a speedometer 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 in sequence from top to bottom; The laser is used to ablate the metal foil of the sample by means of high-intensity laser-driven high-voltage loading to form a shock wave that passes through the metal foil-explosive layer interface and is loaded into the explosive layer, causing the explosive layer to undergo a detonation reaction; The velocity meter is used to obtain the interface velocity and take-off time of the shock wave generated by the detonation reaction when it passes through the interface between the explosive layer and the window material layer; The method for measuring the detonation parameters of trace explosives comprises: preparing a sample sequence; wherein the thickness of the explosive layer in all samples in the sample sequence is an arithmetic sequence; 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 passes through the interface between the explosive layer and the window material layer, and obtain an interface velocity sequence and a take-off time sequence; Detonation parameters are determined according to the interface velocity sequence and the take-off time sequence.

2. The method for measuring detonation parameters of trace 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. The method for measuring detonation parameters of trace explosives according to claim 3, characterized in that: Determining detonation parameters according to the interface velocity sequence and the take-off time sequence includes: determining a detonation velocity according to the take-off time sequence; The explosion pressure is determined according to the interface velocity sequence.

5. The method for measuring detonation parameters of trace explosives according to claim 4, characterized in that: Determining the detonation velocity according to the take-off time sequence comprises: Let the number of iterations i be greater than 1; Determine that the i-th sample in the sample sequence is the current sample; Determine any sample before the current sample in the sample sequence as a comparison sample; Determine the difference between the starting time of the current sample and the starting time of the comparison sample as the current time difference; Determining a thickness difference ΔL according to 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.

6. The method for measuring detonation parameters of trace explosives according to claim 4, characterized in that: Determining the explosion pressure according to the interface velocity sequence includes: Through the impedance matching relationship between the explosive and the window material, the interface velocity is used as the input value to obtain the detonation pressure.

7. A computer device comprising: 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 method for measuring detonation parameters of trace explosives according to any one of claims 1 to 6.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method for measuring detonation parameters of trace explosives according to any one of claims 1 to 6 is implemented.

9. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the method for measuring detonation parameters of trace explosives according to any one of claims 1 to 6 is implemented.

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