Force-electricity coupling test device and test method for friction sensitivity of energetic material

Abstract

The invention relates to the technical field of safety evaluation of energetic materials, in particular to an energetic material friction sensitivity force-electric coupling test device and a test method.The energetic material friction sensitivity force-electric coupling test device comprises a friction sensitivity tester, and the friction sensitivity tester comprises a sample loading assembly, a friction mechanism, an electric coupling system and a pressure loading system; the sample loading assembly comprises a sliding column sleeve, an upper sliding column and a lower sliding column are arranged in an inner cavity of the sliding column sleeve, and a medicine loading cavity is reserved between the upper sliding column and the lower sliding column; the upper sliding column and the lower sliding column are detachably arranged in an inner cavity of the sliding column sleeve in a penetrating mode, and the upper sliding column and the lower sliding column are made of conductive materials. The friction mechanism comprises a pendulum bob, a pendulum bob bracket and a pendulum bob base; the pendulum bob is rotationally connected with the pendulum bob bracket, an angle is carved on the pendulum bob bracket, and the pendulum bob bracket is fixed on the upper surface of the pendulum bob base; the problem that the friction safety of the energetic material under different electrostatic field conditions cannot be obtained due to the fact that research of existing voltage on the performance or sensitivity of the energetic material is less is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of energetic material safety assessment, in particular to a force-electric coupling test device and a test method for friction sensitivity of energetic materials. Background Art

[0002] Most energetic materials are powder or granular substances. During their production, storage and transportation, they inevitably involve processes such as pharmaceutical preparation, mixing, air flow conveying, crushing, bumping and collision. In these processes, there is friction between different substances to form an electrostatic field, which in turn generates electrostatic sparks, causing local hot spots in the energetic materials, inducing thermal decomposition of the energetic materials and ignition and explosion. This phenomenon is essentially caused by the simultaneous coupling of friction and the accompanying electrostatic field. Since energetic materials are substances with a greater risk of explosion, combustion and explosion accidents are caused by the coupling of friction and electrostatic fields. However, traditional academic views mainly discuss the effects of friction and electrostatic fields on the sensitivity of energetic materials separately, which in turn affects the judgment of the ignition threshold of energetic materials under the coupling of friction and electrostatic fields, and cannot make more accurate conclusions on the safety assessment of energetic materials.

[0003] Sensitivity is a measure of the difficulty of energetic materials to undergo chemical reactions such as combustion and explosion under external stimulation. There are relatively complete research methods for friction sensitivity and electrostatic sensitivity. Friction sensitivity can be studied by the explosion probability method in GJB 772A-97, and electrostatic sensitivity can be studied by the lifting method, Langley method and optimized D method. The instantaneous voltage generated in the electrostatic charge accumulation test of energetic materials under the action of friction slip can be obtained, which provides an experimental basis for the voltage value generated by the electrostatic field under the action of electromechanical coupling. However, under the condition of electromechanical coupling, the instantaneous voltage value generated by the current electrostatic field on the ignition response characteristics of energetic materials and its influence law are unknown, as well as the influence of the electric field and friction coupling on the safety performance of energetic materials. There is a lack of quantitative basis and a lack of appropriate loading methods. At present, there are relatively few studies on the effects of voltage on the performance or sensitivity of energetic materials, and it is impossible to obtain the friction safety of energetic materials under different electrostatic field conditions.

[0004] Therefore, it is necessary to invent a mechanical-electric coupling test device and a test method for the friction sensitivity of energetic materials. Summary of the invention

[0005] In order to solve the problem that the friction safety of energetic materials under different electrostatic field conditions cannot be obtained due to relatively little research on the performance or sensitivity of energetic materials to voltage, the present invention provides a mechanoelectric coupling test device and a test method for the friction sensitivity of energetic materials.

[0006] The present invention is achieved by adopting the following technical solutions:

[0007] A mechanical-electric coupling test device for friction sensitivity of energetic materials, comprising a friction sensitivity tester, wherein the friction sensitivity tester comprises a sample loading component, a friction mechanism, an electric coupling system and a pressure loading system;

[0008] The sample loading assembly comprises a sliding column sleeve, the inner cavity of the sliding column sleeve is provided with an upper sliding column and a lower sliding column, and a charge loading cavity is reserved between the upper sliding column and the lower sliding column; the upper sliding column and the lower sliding column are both detachably inserted into the inner cavity of the sliding column sleeve, and the materials of the upper sliding column and the lower sliding column are both conductive materials;

[0009] The friction mechanism includes a pendulum, a pendulum bracket and a pendulum base; the pendulum is rotatably connected to the pendulum bracket, and an angle is engraved on the pendulum bracket, the pendulum bracket is fixed to the upper surface of the pendulum base, a mounting cavity is opened on the pendulum base, and a sliding column sleeve is mounted on the inner bottom wall of the mounting cavity, a limit block is fixed on the inner top wall of the mounting cavity, and the limit block is located directly above the sliding column sleeve, a striking rod is horizontally inserted through the side wall of the pendulum base, and the end of the striking rod is close to the side wall of the upper sliding column, and a punch is vertically inserted through the bottom wall of the pendulum base, the punch is inserted into the inner cavity of the sliding column sleeve, and the punch is located directly below the lower sliding column, and the lower end of the punch is connected to the pressure loading system;

[0010] The electrical coupling system includes a power supply, an upper conductive wire electrically connected to an upper sliding column, and a lower conductive wire electrically connected to a lower sliding column; the upper conductive wire is electrically connected to a positive electrode of the power supply, and the lower conductive wire is electrically connected to a negative electrode of the power supply.

[0011] Furthermore, the inner wall and the lower surface of the sliding column sleeve and the side wall of the lower sliding column are all provided with an insulating layer; the upper surface of the upper sliding column and the lower surface of the lower sliding column are all provided with an insulating gasket.

[0012] Furthermore, the inner wall and the lower surface of the sliding column sleeve are jointly provided with an L-shaped installation groove, and the upper end of the installation groove is higher than the lower surface of the lower sliding column, the middle section of the lower conductive wire is embedded in the installation groove, and an insulating layer is provided on the outer side of the middle section of the lower conductive wire.

[0013] Furthermore, the upper surface of the upper sliding column is higher than the upper surface of the sliding column sleeve, and the end of the upper conductive wire is wrapped around the side wall of the upper sliding column that is higher than the sliding column sleeve; the end of the lower conductive wire is wrapped in a mosquito coil shape and is electrically connected to the lower surface of the lower sliding column.

[0014] Furthermore, the power supply is a voltage-stabilized power supply with adjustable output voltage, and its maximum output voltage is 250V.

[0015] Furthermore, the pressure loading system includes a hydraulic pump, a hydraulic pipeline, a double-acting hydraulic cylinder, a controller, a pressure loading power supply, and a control panel; the hydraulic pump is connected to the double-acting hydraulic cylinder through a hydraulic pipeline, a hydraulic valve is installed on the hydraulic pipeline, the end of the piston rod of the double-acting hydraulic cylinder is fixed to the bottom end of the punch, and a pressure sensor is installed on the piston rod of the double-acting hydraulic cylinder; the controller is electrically connected to the hydraulic pump, the hydraulic valve, the control panel, and the pressure sensor respectively; the pressure loading power supply is electrically connected to the hydraulic pump, the hydraulic valve, the control panel, and the pressure sensor respectively.

[0016] A method for testing the friction sensitivity of energetic materials by electromechanical coupling is provided. The method is implemented based on a test device for testing the friction sensitivity of energetic materials according to the present invention. The method comprises the following steps:

[0017] Step S1: weigh the energetic material according to the selected mass and set it aside;

[0018] Step S2: inserting the lower slide post into the inner cavity of the slide post sleeve, and installing a lower conductive wire on the lower surface of the lower slide post, so that the end of the lower conductive wire is electrically connected to the lower slide post;

[0019] Step S3: electrically connecting the head end of the lower conductive wire to the negative electrode of the power source;

[0020] Step S4: adding the energetic material weighed in step S1 into the sleeve of the sliding column, so that the energetic material is placed on the upper surface of the lower sliding column;

[0021] Step S5: installing an upper sliding column on the upper part of the sliding column sleeve so that the lower surface of the upper sliding column contacts the energetic material;

[0022] Step S6: installing an upper conductive wire on the upper portion of the upper sliding column, so that the end of the upper conductive wire is electrically connected to the upper sliding column; then, electrically connecting the head end of the upper conductive wire to the positive electrode of the power supply;

[0023] Step S7: Turn on the ventilation, install the assembled sample loading assembly in the installation cavity of the friction mechanism, ensure that the lower sliding column is located directly above the punch, the upper sliding column is located directly below the limit block, and the end of the striking rod is close to the side wall of the upper sliding column;

[0024] Step S8: Start the pressure loading system and adjust it to the selected loading pressure, adjust the pendulum to the selected swing angle, adjust the voltage of the power supply to the selected initial voltage and then turn on the power supply. When the pressure is loaded to a predetermined value, the upper surface of the upper sliding column is in close contact with the lower surface of the limit block, and the pendulum is used to impact the striking rod, so that the striking rod impacts the upper sliding column so that the lower surface of the upper sliding column rubs against the energetic material, and a friction sensitivity test is performed, and the result is recorded; if the test result is explosion, step S9 is executed; if the test result is no explosion, step S10 is executed;

[0025] Step S9: Execute steps S1 to S7, adjust the voltage of the power supply to a lower level, so that the difference between the voltage of the power supply and the voltage of the last test is the step voltage, use the pendulum to impact the striking rod, so that the striking rod impacts the upper sliding column to make the lower surface of the upper sliding column rub against the energetic material, perform a friction sensitivity test, and record the result; if the test result is explosion, execute step S11; if the test result is no explosion, execute step S12;

[0026] Step S10: Execute steps S1 to S7, increase the voltage of the power supply so that the difference between the voltage of the power supply and the voltage of the last test is the step voltage, use the pendulum to impact the striking rod, so that the striking rod impacts the upper sliding column so that the lower surface of the upper sliding column rubs against the energetic material, perform a friction sensitivity test, and record the result; if the test result is explosion, execute step S11; if the test result is no explosion, execute step S12;

[0027] Step S11: Calculate the number of friction sensitivity tests. If the number of friction sensitivity tests is less than N, where N is a positive integer, execute step S9; if the number of friction sensitivity tests is equal to N, execute step S13;

[0028] Step S12: Calculate the number of friction sensitivity tests. If the number of friction sensitivity tests is less than N, where N is a positive integer, execute step S10; if the number of friction sensitivity tests is equal to N, execute step S13;

[0029] Step S13: Based on the results of N friction sensitivity tests, the 50% ignition critical voltage is obtained by using the rise and fall method in the pyrotechnic sensitivity statistical method.

[0030] Furthermore, the selected loading pressure is a fixed loading pressure, and the friction sensitivity test is performed by adjusting to different selected swing angles, and the 50% ignition critical voltage of the energetic material under different selected swing angles is measured, so as to observe the change of friction sensitivity of the energetic material with the change of swing angle under the action of electromechanical coupling and with the loading pressure fixed.

[0031] Furthermore, the selected swing angle is a fixed swing angle, and the friction sensitivity test is performed by adjusting to different selected loading pressures, and the 50% ignition critical voltage of the energetic material under different selected loading pressures is measured, so as to observe the change of friction sensitivity of the energetic material with the change of loading pressure under the action of electromechanical coupling and with the swing angle fixed.

[0032] Furthermore, the pressure loading system includes a hydraulic pump, a hydraulic pipeline, a double-acting hydraulic cylinder, a controller, a pressure loading power supply, and a control panel; the hydraulic pump is connected to the double-acting hydraulic cylinder through a hydraulic pipeline, a hydraulic valve is installed on the hydraulic pipeline, the end of the piston rod of the double-acting hydraulic cylinder is fixed to the bottom end of the punch, and a pressure sensor is installed on the piston rod of the double-acting hydraulic cylinder; the controller is electrically connected to the hydraulic pump, the hydraulic valve, the control panel, and the pressure sensor respectively; the pressure loading power supply is electrically connected to the hydraulic pump, the hydraulic valve, the control panel, and the pressure sensor respectively.

[0033] The present invention proposes a force-electric coupling test device for the friction sensitivity of energetic materials. A power source is arranged outside the friction mechanism, and a closed loop is formed by an upper conductive wire and a lower conductive wire. Different degrees of external electric fields can be indirectly applied to energetic material samples. After the energetic material is loaded with pressure by a pressure loading system, a pendulum is used to hit a striking rod, and then the striking rod impacts an upper sliding column so that the lower surface thereof rubs against the energetic material, thereby performing a friction sensitivity test. The energetic material can be powered on and the voltage of the energetic material can be changed without affecting the friction test. The device can be used to measure the 50% ignition critical voltage, and can also measure the friction sensitivity and explosion probability of the energetic material under different voltage conditions under a certain loading pressure condition, and obtain safety data, thereby providing an evaluation means for the safety of the energetic material under different voltage conditions, and further providing an evaluation means for the safety assessment of the energetic material under force-electric coupling conditions, and can obtain the critical ignition safety threshold and reaction energy release law of the energetic material under the external force-electric composite stimulation under different production environments and process conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the structure of the present invention;

[0035] Figure 2 for Figure 1 Schematic diagram of the structure of the sample loading component under pressurized state.

[0036] Figure 3 for Figure 1 Schematic diagram of the structure of the sample loading component in the unpressurized state.

[0037] In the figure: 1. Sample loading assembly; 11. Sliding column sleeve; 12. Upper sliding column; 13. Lower sliding column; 14. Charging chamber; 15. Insulating gasket; 16. Mounting groove; 2. Friction mechanism; 21. Pendulum; 22. Pendulum bracket; 23. Strike rod; 24. Punch; 25. Pendulum base; 26. Limit block; 3. Electric coupling system; 31. Power supply; 32. Upper conductive wire; 33. Lower conductive wire. DETAILED DESCRIPTION

[0038] The present invention is further described in detail below through specific examples. It should be noted that the present invention is not limited to the following examples.

[0039] Example 1

[0040] A mechanical and electrical coupling test device for friction sensitivity of energetic materials, as shown in the attached Figure 1 ~Attached Figure 3 As shown, it includes a friction sensitivity tester, which includes a sample loading component 1, a friction mechanism 2, an electric coupling system 3 and a pressure loading system;

[0041] The sample loading assembly 1 comprises a sliding column sleeve 11, an upper sliding column 12 and a lower sliding column 13 are arranged in the inner cavity of the sliding column sleeve 11, and a charging cavity 14 is reserved between the upper sliding column 12 and the lower sliding column 13; the upper sliding column 12 and the lower sliding column 13 are both detachably arranged in the inner cavity of the sliding column sleeve 11, and the materials of the upper sliding column 12 and the lower sliding column 13 are both conductive materials;

[0042] The friction mechanism 2 includes a pendulum 21, a pendulum bracket 22 and a pendulum base 25; the pendulum 21 is rotatably connected to the pendulum bracket 22, and the pendulum bracket 22 is engraved with an angle, the pendulum bracket 22 is fixed to the upper surface of the pendulum base 25, a mounting cavity is opened on the pendulum base 25, and the sliding column sleeve 11 is mounted on the inner bottom wall of the mounting cavity, a limit block 26 is fixed to the inner top wall of the mounting cavity, and the limit block 26 is located directly above the sliding column sleeve 11, a strike rod 23 is horizontally inserted through the side wall of the pendulum base 25, and the end of the strike rod 23 is close to the side wall of the upper sliding column 12, and a punch 24 is vertically inserted through the bottom wall of the pendulum base 25, the punch 24 is inserted through the inner cavity of the sliding column sleeve 11, and the punch 24 is located directly below the lower sliding column 13, and the lower end of the punch 24 is connected to the pressure loading system;

[0043] The electrical coupling system 3 includes a power source 31, an upper conductive wire 32 electrically connected to the upper sliding column 12, and a lower conductive wire 33 electrically connected to the lower sliding column 13; the upper conductive wire 32 is electrically connected to the positive electrode of the power source 31, and the lower conductive wire 33 is electrically connected to the negative electrode of the power source 31.

[0044] The present invention leaves a charge cavity 14 between the upper slide column 12 and the lower slide column 13, and the energetic material sample can be placed in the charge cavity 14. During the test, by setting the swing angle of the pendulum 21 and adjusting it to a suitable loading pressure through the pressure loading system, the pressure is transmitted to the lower slide column 13 through the punch 24, and then transmitted to the upper slide column 12 through the energetic material from the lower slide column 13, so that the upper surface of the upper slide column 12 is closely attached to the lower surface of the limit block 26. At this time, the pendulum 21 is used to impact the impact rod 23, so that the impact rod 23 impacts the upper slide column 12, so that the upper slide column 12 moves in the direction of the force, and generates friction with the energetic material in the charge cavity 14, so as to realize the measurement of the friction sensitivity of the energetic material. At the same time, during the test, a preset voltage is applied between the upper slide column 12 and the lower slide column 13 through the power supply 31, so that the energetic material is affected by the friction force and the preset voltage at the same time, thereby realizing the electromechanical coupling of the device.

[0045] The present invention takes into account the use environment of the test device, has a simple structure, a small size, and is easy to install; and can use the upper conductive wire 32 and the lower conductive wire 33 to connect the energetic material sample to the power supply 31 to form a closed loop, effectively adjusting different voltage values. In the test device, the lengths of the upper conductive wire 32 and the lower conductive wire 33 are appropriate and not too long, which can ensure the normal operation and safety of the test device. Therefore, the test device can effectively adjust the voltage value received by the sample under the premise of meeting the above conditions and not affecting the friction sensitivity test.

[0046] When assembling the test device, the lower surface of the upper sliding column 12 is lower than the upper surface of the sliding column sleeve 11 , and the lower surface of the lower sliding column 13 is flush with the lower surface of the sliding column sleeve 11 .

[0047] The inner wall and the lower surface of the sliding column sleeve 11 and the side wall of the lower sliding column 13 are all provided with an insulating layer; the upper surface of the upper sliding column 12 and the lower surface of the lower sliding column 13 are all provided with an insulating gasket 15.

[0048] Through the structural design of the insulating layer, insulation can be achieved between the lower slide post 13 and the slide post sleeve 11, and between the upper slide post 12 and the slide post sleeve 11. Through the structural design of the insulating gasket 15, insulation can be achieved between the lower slide post 13 and the punch 24, and between the upper slide post 12 and the limit block 26, so as to avoid short circuit in the power-on circuit.

[0049] The inner wall and the lower surface of the sliding column sleeve 11 are jointly provided with an L-shaped installation groove 16, and the upper end of the installation groove 16 is higher than the lower surface of the lower sliding column 13, the middle section of the lower conductive wire 33 is embedded in the installation groove 16, and an insulating layer is provided on the outer side of the middle section of the lower conductive wire 33.

[0050] The structural design of the mounting groove 16 can realize the smooth movement and position limiting of the lower conductive wire 33 during the displacement process of the lower slide column 13 from the unpressurized state to the pressurized state. Figure 2 , Attachment Figure 3 As shown, the lower slide post 13 gradually rises under the action of the selected loading pressure F, and the lower conductive wire 33 moves and rises in the mounting groove 16 as the lower slide post 13 rises. When the selected loading pressure F is loaded, since the upper end of the mounting groove 16 is higher than the lower surface of the lower slide post 13, the middle section of the lower conductive wire 33 is located inside the mounting groove 16. If the mounting groove 16 is not provided, the lower conductive wire 33 may be cut off or the insulating layer may be damaged due to the interaction between the punch 24 and the slide post sleeve 11 during the loading process of the selected loading pressure F, thereby causing voltage loading failure. The mounting groove 16 needs to be rounded at the corner between the inner wall and the lower surface of the slide post sleeve 11.

[0051] The upper surface of the upper sliding column 12 is higher than the upper surface of the sliding column sleeve 11, and the end of the upper conductive wire 32 is wrapped around the side wall of the upper sliding column 12 that is higher than the sliding column sleeve 11; the end of the lower conductive wire 33 is wrapped in a mosquito coil shape and is electrically connected to the lower surface of the lower sliding column 13.

[0052] The end of the lower conductive wire 33 is wrapped in a mosquito coil shape and contacts the lower surface of the lower descending column 13 , with a sufficiently large contact area to ensure the formation of a closed loop, and the lower conductive wire 33 is fixed by being arranged between the insulating gasket 15 and the lower surface of the lower descending column 13 .

[0053] The power supply 31 is a voltage-stabilized power supply with adjustable output voltage, and its maximum output voltage is 250V.

[0054] The pressure loading system includes a hydraulic pump, a hydraulic pipeline, a double-acting hydraulic cylinder, a controller, a pressure loading power supply, and a control panel; the hydraulic pump is connected to the double-acting hydraulic cylinder through a hydraulic pipeline, a hydraulic valve is installed on the hydraulic pipeline, the end of the piston rod of the double-acting hydraulic cylinder is fixed to the bottom end of the punch 24, and a pressure sensor is installed on the piston rod of the double-acting hydraulic cylinder; the controller is electrically connected to the hydraulic pump, the hydraulic valve, the control panel, and the pressure sensor respectively; the pressure loading power supply is electrically connected to the hydraulic pump, the hydraulic valve, the control panel, and the pressure sensor respectively.

[0055] When using the pressure loading system, the staff first sets the loading pressure value through the control panel. After receiving the set value, the controller controls the hydraulic valve to open and the hydraulic pump to start. The hydraulic pump transmits hydraulic oil to the double-acting hydraulic cylinder through the hydraulic pipeline. The hydraulic oil pushes the piston of the double-acting hydraulic cylinder, and then pushes the piston rod, so that the piston rod pushes the punch 24 to move, and then the punch 24 pushes the lower sliding column 13 to move. The lower sliding column 13 pushes the upper sliding column 12 to move through the energetic material, so that the upper surface of the upper sliding column 12 is close to the lower surface of the limit block 26. In this process, the pressure sensor monitors the pressure loaded on the punch 24 in real time, and promptly feeds back the data to the controller. The controller adjusts the working status of the hydraulic pump and the hydraulic valve according to the feedback data to ensure that the loading pressure is stable at the set value. When the loading pressure reaches the predetermined value, the controller sends an instruction through the control panel to start the friction sensitivity test.

[0056] Example 2

[0057] A method for testing the friction sensitivity of energetic materials by electromechanical coupling is provided. The method is implemented based on a test device for testing the friction sensitivity of energetic materials according to the present invention. The method comprises the following steps:

[0058] Step S1: weigh the energetic material according to the selected mass and set it aside;

[0059] Step S2: insert the lower slide post 13 into the inner cavity of the slide post sleeve 11, and install the lower conductive wire 33 on the lower surface of the lower slide post 13, wrap the end of the lower conductive wire 33 in a mosquito coil shape to contact the lower surface of the lower slide post 13, and then fix a piece of insulating gasket 15 on the lower surface of the lower slide post 13, so that the end of the lower conductive wire 33 is clamped between the lower surface of the lower slide post 13 and the insulating gasket 15, so as to fix the lower conductive wire 33, thereby ensuring the electrical connection between the lower conductive wire 33 and the lower slide post 13, and at the same time, embed the middle section of the lower conductive wire 33 into the inside of the installation groove 16;

[0060] Step S3: electrically connecting the head end of the lower conductive wire 33 to the negative electrode of the power source 31;

[0061] When placing the lower slide post 13, the insulating gasket 15 on the lower surface of the lower slide post 13 is flush with the lower surface of the slide post sleeve 11. In this way, the energetic material can be evenly laid on the upper surface of the lower slide post 13 in the following step S4, so that the energetic material sample can be evenly subjected to the combined effects of friction and electricity.

[0062] Step S4: adding the energetic material weighed in step S1 into the slide column sleeve 11, so that the energetic material is placed on the upper surface of the lower slide column 13;

[0063] Step S5: installing the upper sliding column 12 on the upper part of the sliding column sleeve 11, so that the lower surface of the upper sliding column 12 is in contact with the energetic material;

[0064] Step S6: Install the upper conductive wire 32 on the upper part of the upper sliding column 12, and wind the end of the upper conductive wire 32 around the side wall of the upper sliding column 12 that is higher than the sliding column sleeve 11, to ensure that the upper conductive wire 32 is electrically connected to the sliding column sleeve 11, and at the same time, take an insulating gasket 15 and fix it on the upper surface of the upper sliding column 12; then, electrically connect the head end of the upper conductive wire 32 to the positive pole of the power supply 31;

[0065] Step S7: Turn on the ventilation, install the assembled sample loading assembly 1 in the installation cavity of the friction mechanism 2, ensure that the lower slide post 13 is located directly above the punch 24, the upper slide post 12 is located directly below the limit block 26, and the end of the striking rod 23 is close to the side wall of the upper slide post 12;

[0066] Through the above steps S1 to S7, the sample preparation of the energetic material and the preparation of the power supply lead can be achieved, so that a closed loop is formed between the power supply 31, the upper conductive wire 32, the upper sliding column 12, the energetic material, the lower sliding column 13, and the lower conductive wire 33. After the installation is completed, the upper sliding column 12 and its corresponding insulating gasket 15, the upper sliding column 12 and the upper conductive wire 32, the lower sliding column 13 and its corresponding insulating gasket 15, and the lower sliding column 13 and the lower conductive wire 33 can be further fixed by insulating tape.

[0067] Step S8: Start the pressure loading system and adjust it to the selected loading pressure, adjust the pendulum 21 to the selected swing angle, adjust the voltage of the power supply 31 to the selected initial voltage and then turn on the power supply 31. When the pressure is loaded to the predetermined value, the pressure is transmitted to the lower slide column 13 through the punch 24, and then transmitted to the upper slide column 12 through the energetic material by the lower slide column 13, so that the upper surface of the upper slide column 12 is closely attached to the lower surface of the limit block 26, and the pendulum 21 is used to impact the striking rod 23, so that the striking rod 23 impacts the upper slide column 12 so that the lower surface thereof rubs against the energetic material, and a friction sensitivity test is performed, and the result is recorded; if the test result is explosion, step S9 is executed; if the test result is no explosion, step S10 is executed;

[0068] The pressure loading system includes a hydraulic pump, a hydraulic pipeline, a double-acting hydraulic cylinder, a controller, a pressure loading power supply, and a control panel; the hydraulic pump is connected to the double-acting hydraulic cylinder through a hydraulic pipeline, a hydraulic valve is installed on the hydraulic pipeline, the end of the piston rod of the double-acting hydraulic cylinder is fixed to the bottom end of the punch 24, and a pressure sensor is installed on the piston rod of the double-acting hydraulic cylinder; the controller is electrically connected to the hydraulic pump, the hydraulic valve, the control panel, and the pressure sensor respectively; the pressure loading power supply is electrically connected to the hydraulic pump, the hydraulic valve, the control panel, and the pressure sensor respectively.

[0069] When starting the pressure loading system, the staff first sets the loading pressure value to the selected loading pressure through the control panel. After receiving the set value, the controller controls the hydraulic valve to open and the hydraulic pump to start. The hydraulic pump transports the hydraulic oil to the double-acting hydraulic cylinder through the hydraulic pipeline. The hydraulic oil pushes the piston of the double-acting hydraulic cylinder, and then pushes the piston rod, so that the piston rod pushes the punch 24 to move, and then the punch 24 pushes the lower sliding column 13 to move. The lower sliding column 13 pushes the upper sliding column 12 to move through the energetic material, so that the upper surface of the upper sliding column 12 is close to the lower surface of the limit block 26. During this process, the pressure sensor monitors the pressure loaded on the punch 24 in real time, and promptly feeds back the data to the controller. The controller adjusts the working status of the hydraulic pump and the hydraulic valve according to the feedback data to ensure that the loading pressure is stable at the set value. When the loading pressure reaches the predetermined value, the controller issues an instruction through the control panel to adjust the pendulum 21 to the selected swing angle.

[0070] When any of the following phenomena is observed, such as explosion sound, light emission, smoke emission, sample color change, or trace smell of gas products on the lower surface of the upper slide column 12 or the upper surface of the lower slide column 13 in contact with the energetic material sample, it is judged to be an explosion; otherwise, it is considered to be no explosion.

[0071] Step S9: Execute steps S1 to S7, adjust the voltage of the power supply 31 downward, so that the difference between the voltage of the power supply 31 and the last test voltage is the step voltage, use the pendulum 21 to impact the striking rod 23, so that the striking rod 23 impacts the upper sliding column 12 so that the lower surface thereof rubs against the energetic material, perform a friction sensitivity test, and record the result; if the test result is explosion, execute step S11; if the test result is no explosion, execute step S12;

[0072] The power supply 31 is a voltage-stabilized power supply with adjustable output voltage, and its maximum output voltage is 250V; the initial voltage is 15V; and the step voltage is 5V.

[0073] By selecting the power supply 31 as a voltage-stabilized power supply with adjustable output voltage, the voltage of the test method can be set to a plurality of different preset voltages, and the adjustment is convenient.

[0074] Step S10: Execute steps S1 to S7, increase the voltage of the power supply 31, so that the difference between the voltage of the power supply 31 and the last test voltage is the step voltage, use the pendulum 21 to impact the striking rod 23, so that the striking rod 23 impacts the upper sliding column 12 so that the lower surface of the upper sliding column 12 rubs against the energetic material, perform a friction sensitivity test, and record the result; if the test result is explosion, execute step S11; if the test result is no explosion, execute step S12;

[0075] Step S11: Calculate the number of friction sensitivity tests. If the number of friction sensitivity tests is less than N, where N is a positive integer, execute step S9; if the number of friction sensitivity tests is equal to N, execute step S13;

[0076] Step S12: Calculate the number of friction sensitivity tests. If the number of friction sensitivity tests is less than N, where N is a positive integer, execute step S10; if the number of friction sensitivity tests is equal to N, execute step S13; Step S13: According to the results of N friction sensitivity tests, the 50% ignition critical voltage is obtained by using the rise and fall method in the pyrotechnic sensitivity statistical method, as follows:

[0077] When the number of explosions in the N friction sensitivity tests is less than or equal to the number of no explosions, the 50% critical ignition voltage V 50 It is calculated by the following formula (I):

[0078]

[0079] Where V 50 is the 50% critical ignition voltage, in volts; V0 is the initial voltage, in volts; d is the step voltage, in volts; A1 is the first calculation factor, calculated by formula (II); n is the number of explosions;

[0080] A1=∑ i in i (II)

[0081] Where i is the stimulus number, and the value of i is 0, ±1, ±2, ±3, ...; wherein stimulus number 0 corresponds to the initial voltage V0; the test voltage that is larger than the initial voltage V0 and has a difference of id from the initial voltage V0 corresponds to i; the test voltage that is smaller than the initial voltage V0 and has a difference of id from the initial voltage V0 corresponds to -i; n i is the number of tests in which explosion occurs when the input voltage is the test voltage with stimulus sequence number i;

[0082] When the number of explosions in the results of N impact sensitivity tests is greater than the number of no explosions, the 50% ignition voltage is calculated by the following formula (III):

[0083]

[0084] Where V 50 is the 50% critical ignition voltage, in volts; V0 is the initial voltage, in volts; d is the step voltage, in volts; A2 is the second calculation factor, calculated by formula (IV); m is the number of times no explosion occurs;

[0085] A2=∑ j jm j (IV)

[0086] In the formula, j is the stimulus quantity serial number, and the value of j is 0, ±1, ±2, ±3, ...; among them, the stimulus quantity serial number 0 corresponds to the initial voltage V0; the test voltage that is larger than the initial voltage V0 and has a difference of jd with the initial voltage V0 corresponds to j; the test voltage that is smaller than the initial voltage V0 and has a difference of jd with the initial voltage V0 corresponds to -j; is the number of tests in which no explosion occurs when the input voltage is the test voltage with the stimulus serial number j.

[0087] In this embodiment, the selected loading pressure is a fixed loading pressure, the ratio of the energetic material is a fixed ratio, and the step voltage is a fixed step voltage. By adjusting the pendulum 21 to different selected swing angles and performing the friction sensitivity test in turn, the 50% ignition critical voltage of the energetic material under different selected swing angles of the pendulum 21 can be measured. By comparison, it is possible to observe the influence of the change in horizontal impact force on the friction sensitivity of the energetic material under the action of electromechanical coupling and when the selected loading pressure, the ratio of the energetic material, and the step voltage are all quantitative, thereby realizing the safety evaluation of the energetic material under electromechanical coupling conditions.

[0088] Example 3

[0089] A method for testing the friction sensitivity of energetic materials by electromechanical coupling is provided. The method is implemented based on a test device for testing the friction sensitivity of energetic materials according to the present invention. The method comprises the following steps:

[0090] Step S1: weigh the energetic material according to the selected mass and set it aside;

[0091] Step S2: insert the lower slide post 13 into the inner cavity of the slide post sleeve 11, and install the lower conductive wire 33 on the lower surface of the lower slide post 13, wrap the end of the lower conductive wire 33 in a mosquito coil shape to contact the lower surface of the lower slide post 13, and then fix a piece of insulating gasket 15 on the lower surface of the lower slide post 13, so that the end of the lower conductive wire 33 is clamped between the lower surface of the lower slide post 13 and the insulating gasket 15, so as to fix the lower conductive wire 33, thereby ensuring the electrical connection between the lower conductive wire 33 and the lower slide post 13, and at the same time, embed the middle section of the lower conductive wire 33 into the inside of the installation groove 16;

[0092] Step S3: electrically connecting the head end of the lower conductive wire 33 to the negative electrode of the power source 31;

[0093] When placing the lower slide post 13, the insulating gasket 15 on the lower surface of the lower slide post 13 is flush with the lower surface of the slide post sleeve 11. In this way, the energetic material can be evenly laid on the upper surface of the lower slide post 13 in the following step S4, so that the energetic material sample can be evenly subjected to the combined effects of friction and electricity.

[0094] Step S4: adding the energetic material weighed in step S1 into the slide column sleeve 11, so that the energetic material is placed on the upper surface of the lower slide column 13;

[0095] Step S5: installing the upper sliding column 12 on the upper part of the sliding column sleeve 11, so that the lower surface of the upper sliding column 12 is in contact with the energetic material;

[0096] Step S6: Install the upper conductive wire 32 on the upper part of the upper sliding column 12, and wind the end of the upper conductive wire 32 around the side wall of the upper sliding column 12 that is higher than the sliding column sleeve 11, to ensure that the upper conductive wire 32 is electrically connected to the sliding column sleeve 11, and at the same time, take an insulating gasket 15 and fix it on the upper surface of the upper sliding column 12; then, electrically connect the head end of the upper conductive wire 32 to the positive pole of the power supply 31;

[0097] Step S7: Turn on the ventilation, install the assembled sample loading assembly 1 in the installation cavity of the friction mechanism 2, ensure that the lower slide post 13 is located directly above the punch 24, the upper slide post 12 is located directly below the limit block 26, and the end of the striking rod 23 is close to the side wall of the upper slide post 12;

[0098] Through the above steps S1 to S7, the sample preparation of the energetic material and the preparation of the power supply lead can be achieved, so that a closed loop is formed between the power supply 31, the upper conductive wire 32, the upper sliding column 12, the energetic material, the lower sliding column 13, and the lower conductive wire 33. After the installation is completed, the upper sliding column 12 and its corresponding insulating gasket 15, the upper sliding column 12 and the upper conductive wire 32, the lower sliding column 13 and its corresponding insulating gasket 15, and the lower sliding column 13 and the lower conductive wire 33 can be further fixed by insulating tape.

[0099] Step S8: Start the pressure loading system and adjust it to the selected loading pressure, adjust the pendulum 21 to the selected swing angle, adjust the voltage of the power supply 31 to the selected initial voltage and then turn on the power supply 31. When the pressure is loaded to the predetermined value, the pressure is transmitted to the lower slide column 13 through the punch 24, and then transmitted to the upper slide column 12 through the energetic material by the lower slide column 13, so that the upper surface of the upper slide column 12 is closely attached to the lower surface of the limit block 26, and the pendulum 21 is used to impact the striking rod 23, so that the striking rod 23 impacts the upper slide column 12 so that the lower surface thereof rubs against the energetic material, and a friction sensitivity test is performed, and the result is recorded; if the test result is explosion, step S9 is executed; if the test result is no explosion, step S10 is executed;

[0100] The pressure loading system includes a hydraulic pump, a hydraulic pipeline, a double-acting hydraulic cylinder, a controller, a pressure loading power supply, and a control panel; the hydraulic pump is connected to the double-acting hydraulic cylinder through a hydraulic pipeline, a hydraulic valve is installed on the hydraulic pipeline, the end of the piston rod of the double-acting hydraulic cylinder is fixed to the bottom end of the punch 24, and a pressure sensor is installed on the piston rod of the double-acting hydraulic cylinder; the controller is electrically connected to the hydraulic pump, the hydraulic valve, the control panel, and the pressure sensor respectively; the pressure loading power supply is electrically connected to the hydraulic pump, the hydraulic valve, the control panel, and the pressure sensor respectively.

[0101] When starting the pressure loading system, the staff first sets the loading pressure value to the selected loading pressure through the control panel. After receiving the set value, the controller controls the hydraulic valve to open and the hydraulic pump to start. The hydraulic pump transports the hydraulic oil to the double-acting hydraulic cylinder through the hydraulic pipeline. The hydraulic oil pushes the piston of the double-acting hydraulic cylinder, and then pushes the piston rod, so that the piston rod pushes the punch 24 to move, and then the punch 24 pushes the lower sliding column 13 to move. The lower sliding column 13 pushes the upper sliding column 12 to move through the energetic material, so that the upper surface of the upper sliding column 12 is close to the lower surface of the limit block 26. During this process, the pressure sensor monitors the pressure loaded on the punch 24 in real time, and promptly feeds back the data to the controller. The controller adjusts the working status of the hydraulic pump and the hydraulic valve according to the feedback data to ensure that the loading pressure is stable at the set value. When the loading pressure reaches the predetermined value, the controller issues an instruction through the control panel to adjust the pendulum 21 to the selected swing angle.

[0102] When any of the following phenomena is observed, such as explosion sound, light emission, smoke emission, sample color change, or trace smell of gas products on the lower surface of the upper slide column 12 or the upper surface of the lower slide column 13 in contact with the energetic material sample, it is judged to be an explosion; otherwise, it is considered to be no explosion.

[0103] Step S9: Execute steps S1 to S7, adjust the voltage of the power supply 31 downward, so that the difference between the voltage of the power supply 31 and the last test voltage is the step voltage, use the pendulum 21 to impact the striking rod 23, so that the striking rod 23 impacts the upper sliding column 12 so that the lower surface thereof rubs against the energetic material, perform a friction sensitivity test, and record the result; if the test result is explosion, execute step S11; if the test result is no explosion, execute step S12;

[0104] The power supply 31 is a voltage-stabilized power supply with adjustable output voltage, and its maximum output voltage is 250V; the initial voltage is 15V; and the step voltage is 5V.

[0105] By selecting the power supply 31 as a voltage-stabilized power supply with adjustable output voltage, the voltage of the test method can be set to a plurality of different preset voltages, and the adjustment is convenient.

[0106] Step S10: Execute steps S1 to S7, increase the voltage of the power supply 31, so that the difference between the voltage of the power supply 31 and the last test voltage is the step voltage, use the pendulum 21 to impact the striking rod 23, so that the striking rod 23 impacts the upper sliding column 12 so that the lower surface of the upper sliding column 12 rubs against the energetic material, perform a friction sensitivity test, and record the result; if the test result is explosion, execute step S11; if the test result is no explosion, execute step S12;

[0107] Step S11: Calculate the number of friction sensitivity tests. If the number of friction sensitivity tests is less than N, where N is a positive integer, execute step S9; if the number of friction sensitivity tests is equal to N, execute step S13;

[0108] Step S12: Calculate the number of friction sensitivity tests. If the number of friction sensitivity tests is less than N, where N is a positive integer, execute step S10; if the number of friction sensitivity tests is equal to N, execute step S13; Step S13: According to the results of N friction sensitivity tests, the 50% ignition critical voltage is obtained by using the rise and fall method in the pyrotechnic sensitivity statistical method, as follows:

[0109] When the number of explosions in the N friction sensitivity tests is less than or equal to the number of no explosions, the 50% critical ignition voltage V 50 It is calculated by the following formula (I):

[0110]

[0111] Where V 50 is the 50% critical ignition voltage, in volts; V0 is the initial voltage, in volts; d is the step voltage, in volts; A1 is the first calculation factor, calculated by formula (II); n is the number of explosions;

[0112] A1=∑ i in i (II)

[0113] Where i is the stimulus number, and the value of i is 0, ±1, ±2, ±3, ...; wherein stimulus number 0 corresponds to the initial voltage V0; the test voltage that is larger than the initial voltage V0 and has a difference of id from the initial voltage V0 corresponds to i; the test voltage that is smaller than the initial voltage V0 and has a difference of id from the initial voltage V0 corresponds to -i; n i is the number of tests in which explosion occurs when the input voltage is the test voltage with stimulus sequence number i;

[0114] When the number of explosions in the results of N impact sensitivity tests is greater than the number of no explosions, the 50% ignition voltage is calculated by the following formula (III):

[0115]

[0116] Where V 50 is the 50% critical ignition voltage, in volts; V0 is the initial voltage, in volts; d is the step voltage, in volts; A2 is the second calculation factor, calculated by formula (IV); m is the number of times no explosion occurs;

[0117] A2=∑ j jm j (IV)

[0118] In the formula, j is the stimulus quantity serial number, and the value of j is 0, ±1, ±2, ±3, ...; among them, the stimulus quantity serial number 0 corresponds to the initial voltage V0; the test voltage that is larger than the initial voltage V0 and has a difference of jd with the initial voltage V0 corresponds to j; the test voltage that is smaller than the initial voltage V0 and has a difference of jd with the initial voltage V0 corresponds to -j; is the number of tests in which no explosion occurs when the input voltage is the test voltage with the stimulus serial number j.

[0119] In this embodiment, the selected swing angle of the pendulum 21 is a fixed swing angle, the ratio of the energetic material is a fixed ratio, and the step voltage is a fixed step voltage. By adjusting to different selected loading pressures and performing the friction sensitivity test in sequence, the 50% ignition critical voltage of the energetic material under different selected loading pressures can be measured. By comparison, it is possible to observe the influence of the change in vertical loading pressure on the friction sensitivity of the energetic material under the action of electromechanical coupling and when the selected swing angle of the pendulum 21, the ratio of the energetic material, and the step voltage are all quantitative, thereby realizing the safety evaluation of the energetic material under electromechanical coupling conditions.

[0120] In the description of the present invention, it is necessary to understand that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0121] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mechanical and electrical coupling test device for friction sensitivity of energetic materials, characterized in that: The friction sensitivity tester comprises a sample loading component (1), a friction mechanism (2), an electric coupling system (3) and a pressure loading system; The sample loading component (1) comprises a sliding column sleeve (11), the inner cavity of the sliding column sleeve (11) is provided with an upper sliding column (12) and a lower sliding column (13), and a charge chamber (14) is reserved between the upper sliding column (12) and the lower sliding column (13); the upper sliding column (12) and the lower sliding column (13) are both detachably inserted into the inner cavity of the sliding column sleeve (11), and the materials of the upper sliding column (12) and the lower sliding column (13) are both conductive materials; The friction mechanism (2) comprises a pendulum (21), a pendulum bracket (22) and a pendulum base (25); the pendulum (21) is rotatably connected to the pendulum bracket (22), and an angle is engraved on the pendulum bracket (22); the pendulum bracket (22) is fixed to the upper surface of the pendulum base (25), and the pendulum base (25) is provided with a mounting cavity, and the sliding column sleeve (11) is mounted on the inner bottom wall of the mounting cavity, and a limit block (26) is fixed on the inner top wall of the mounting cavity, and the limit block (26) is fixed on the inner top wall of the mounting cavity. The positioning block (26) is located directly above the sliding column sleeve (11), a striking rod (23) is inserted horizontally through the side wall of the pendulum base (25), the end of the striking rod (23) is close to the side wall of the upper sliding column (12), and a punch (24) is inserted vertically through the bottom wall of the pendulum base (25). The punch (24) is inserted into the inner cavity of the sliding column sleeve (11), and the punch (24) is located directly below the lower sliding column (13), and the lower end of the punch (24) is connected to the pressure loading system; The electrical coupling system (3) comprises a power source (31), an upper conductive wire (32) electrically connected to an upper sliding column (12), and a lower conductive wire (33) electrically connected to a lower sliding column (13); the upper conductive wire (32) is electrically connected to a positive electrode of the power source (31), and the lower conductive wire (33) is electrically connected to a negative electrode of the power source (31).

2. The energetic material friction sensitivity electromechanical coupling experimental device according to claim 1, characterized in that: The inner wall and lower surface of the sliding column sleeve (11) and the side wall of the lower sliding column (13) are both provided with an insulating layer; the upper surface of the upper sliding column (12) and the lower surface of the lower sliding column (13) are both provided with an insulating gasket (15).

3. The energetic material friction sensitivity electromechanical coupling experimental device according to claim 1, characterized in that: The inner wall and the lower surface of the sliding column sleeve (11) are jointly provided with an L-shaped mounting groove (16), and the upper end of the mounting groove (16) is higher than the lower surface of the lower sliding column (13), the middle section of the lower conductive wire (33) is embedded in the mounting groove (16), and an insulating layer is provided on the outer side of the middle section of the lower conductive wire (33).

4. The energetic material friction sensitivity electromechanical coupling experimental device according to claim 1, characterized in that: The upper surface of the upper sliding column (12) is higher than the upper surface of the sliding column sleeve (11), and the end of the upper conductive wire (32) is wound around the side wall of the upper sliding column (12) that is higher than the sliding column sleeve (11); the end of the lower conductive wire (33) is wound around in a mosquito coil shape and is electrically connected to the lower surface of the lower sliding column (13).

5. The energetic material friction sensitivity electromechanical coupling experimental device according to claim 1, characterized in that: The power supply (31) is a voltage-stabilized power supply with adjustable output voltage, and its maximum output voltage is 250V.

6. The electromechanical coupling test device for friction sensitivity of energetic materials according to claim 1, characterized in that: The pressure loading system comprises a hydraulic pump, a hydraulic pipeline, a double-acting hydraulic cylinder, a controller, a pressure loading power supply, and a control panel; the hydraulic pump is connected to the double-acting hydraulic cylinder through the hydraulic pipeline, a hydraulic valve is installed on the hydraulic pipeline, the end of the piston rod of the double-acting hydraulic cylinder is fixed to the bottom end of the punch (24), and a pressure sensor is installed on the piston rod of the double-acting hydraulic cylinder; the controller is electrically connected to the hydraulic pump, the hydraulic valve, the control panel, and the pressure sensor respectively; the pressure loading power supply is electrically connected to the hydraulic pump, the hydraulic valve, the control panel, and the pressure sensor respectively.

7. A method for testing friction sensitivity of energetic materials by electromechanical coupling, characterized in that: The test method is implemented based on a mechanical-electric coupling test device for friction sensitivity of energetic materials as described in claim 1; the test method comprises the following steps: Step S1: weigh the energetic material according to the selected mass and set aside; Step S2: inserting the lower slide post (13) into the inner cavity of the slide post sleeve (11), and installing the lower conductive wire (33) on the lower surface of the lower slide post (13), so that the end of the lower conductive wire (33) is electrically connected to the lower slide post (13); Step S3: electrically connecting the head end of the lower conductive wire (33) to the negative electrode of the power source (31); Step S4: adding the energetic material weighed in step S1 into the sliding column sleeve (11), so that the energetic material is placed on the upper surface of the lower sliding column (13); Step S5: installing an upper sliding column (12) on the upper part of the sliding column sleeve (11) so that the lower surface of the upper sliding column (12) is in contact with the energetic material; Step S6: installing an upper conductive wire (32) on the upper portion of the upper sliding column (12), so that the end of the upper conductive wire (32) is electrically connected to the upper sliding column (12); and then, electrically connecting the head end of the upper conductive wire (32) to the positive pole of the power source (31); Step S7: Open the ventilation, install the assembled sample loading assembly (1) in the installation cavity of the friction mechanism (2), ensure that the lower sliding column (13) is located directly above the punch (24), the upper sliding column (12) is located directly below the limit block (26), and the end of the striking rod (23) is close to the side wall of the upper sliding column (12); Step S8: start the pressure loading system and adjust it to the selected loading pressure, adjust the pendulum (21) to the selected swing angle, adjust the voltage of the power supply (31) to the selected initial voltage and then turn on the power supply (31). When the pressure is loaded to a predetermined value, the upper surface of the upper sliding column (12) is tightly attached to the lower surface of the limit block (26), and the pendulum (21) is used to impact the striking rod (23), so that the striking rod (23) impacts the upper sliding column (12) so that the lower surface thereof rubs against the energetic material, and a friction sensitivity test is performed, and the result is recorded; if the test result is explosion, step S9 is executed; If the test result is no explosion, execute step S10; Step S9: executing steps S1 to S7, lowering the voltage of the power supply (31) so that the difference between the voltage of the power supply (31) and the voltage of the last test is the step voltage, using the pendulum (21) to impact the striking rod (23), so that the striking rod (23) impacts the upper sliding column (12) so that the lower surface thereof rubs against the energetic material, performing a friction sensitivity test, and recording the result; if the test result is an explosion, executing step S11; if the test result is no explosion, executing step S12; Step S10: Execute steps S1 to S7, increase the voltage of the power supply (31), so that the difference between the voltage of the power supply (31) and the voltage of the last test is the step voltage, use the pendulum (21) to impact the striking rod (23), so that the striking rod (23) impacts the upper sliding column (12) so that the lower surface thereof rubs against the energetic material, perform a friction sensitivity test, and record the result; if the test result is explosion, execute step S11; if the test result is no explosion, execute step S12; Step S11: Calculate the number of friction sensitivity tests. If the number of friction sensitivity tests is less than N, where N is a positive integer, execute step S9; if the number of friction sensitivity tests is equal to N, execute step S13; Step S12: Calculate the number of friction sensitivity tests. If the number of friction sensitivity tests is less than N, where N is a positive integer, execute step S10; if the number of friction sensitivity tests is equal to N, execute step S13; Step S13: According to the results of N friction sensitivity tests, the 50% ignition critical voltage is obtained by using the rise and fall method in the statistical method of pyrotechnic sensitivity.

8. The electromechanical coupling test method for friction sensitivity of energetic materials according to claim 7, characterized in that: The selected loading pressure is a fixed loading pressure. The friction sensitivity test is performed by adjusting to different selected swing angles, and the 50% ignition critical voltage of the energetic material under different selected swing angles is measured, so as to observe the change of the friction sensitivity of the energetic material with the change of the swing angle under the action of electromechanical coupling and with the loading pressure fixed.

9. The electromechanical coupling test method for friction sensitivity of energetic materials according to claim 7, characterized in that: The selected swing angle is a fixed swing angle. The friction sensitivity test is performed by adjusting to different selected loading pressures, and the 50% ignition critical voltage of the energetic material under different selected loading pressures is measured, so as to observe the change of friction sensitivity of the energetic material with the change of loading pressure under the action of electromechanical coupling and with the swing angle fixed.

10. The electromechanical coupling test method for friction sensitivity of energetic materials according to claim 7, characterized in that: The pressure loading system comprises a hydraulic pump, a hydraulic pipeline, a double-acting hydraulic cylinder, a controller, a pressure loading power supply, and a control panel; the hydraulic pump is connected to the double-acting hydraulic cylinder through the hydraulic pipeline, a hydraulic valve is installed on the hydraulic pipeline, the end of the piston rod of the double-acting hydraulic cylinder is fixed to the bottom end of the punch (24), and a pressure sensor is installed on the piston rod of the double-acting hydraulic cylinder; the controller is electrically connected to the hydraulic pump, the hydraulic valve, the control panel, and the pressure sensor respectively; the pressure loading power supply is electrically connected to the hydraulic pump, the hydraulic valve, the control panel, and the pressure sensor respectively.

Images