A detection system for light gas gun loading test of sinusoidal wave surface samples

Abstract

The present invention relates to the field of shock compression technology, and specifically to a detection system for a light gas gun loading test of a sinusoidal wave surface sample, comprising a sinusoidal wave surface sample, a probe fixture, a heating sleeve, a trigger probe, a plurality of electric probes, a first resistance unit, a capacitor, a power supply and an oscilloscope, wherein the sinusoidal wave surface sample and the probe fixture are respectively arranged in the heating sleeve, and the sinusoidal wave surface sample and the probe fixture are respectively wedge-shaped structures, and the wedge-shaped surface of the sinusoidal wave surface sample corresponds to the wedge-shaped surface of the probe fixture. The present invention can obtain the evolution law of the shock wave front disturbance amplitude and the shock wave front disturbance amplitude oscillation attenuation law by analyzing the relationship between the installation position of the electric probe and the conduction time of the electric probe, and further, can analyze the shear viscosity coefficient of the sample material under a given temperature and pressure environment, can realize the detection of the shear viscosity coefficient of metals under high temperature and high pressure, and has important significance for in-depth analysis and research on the impact dynamic characteristics of materials.

Description

Technical Field

[0001] The invention relates to the technical field of shock compression, and in particular to a detection system for a light gas gun loading test of a sinusoidal wave surface sample. Background Art

[0002] Studying the properties of condensed matter and its changing laws under extreme conditions is one of the frontiers of physics research, and this research is closely related to the development of human society. Most of the condensed matter in the universe is under high pressure. Under extreme conditions of high temperature and high pressure, the distance between atoms / molecules in condensed matter will be shortened, the interaction will be significantly enhanced, the inner electrons of atoms can participate in bonding, the original structure will be destroyed, leading to phase changes of matter, changes in physical properties, and even the emergence of novel physical phenomena different from the normal state. Therefore, the study of the behavior of matter under extreme conditions such as ultra-high pressure can be widely used in national defense, new energy, new materials, geology, planetary science, chemistry, condensed matter physics, biomedicine and other fields.

[0003] Viscosity is one of the physical properties of materials. ① The key parameters for studying the problem of nuclear weapon implosion compression; as we all know, the action development process of nuclear weapons can be divided into multiple stages, among which the most critical are the several mechanical stages of the implosion compression work process. The accuracy of the description of these mechanical stages directly affects the accurate prediction of the subsequent nuclear reaction process. During the process of metal flying layer energy absorption acceleration flight and deceleration compression, the temperature of the metal can reach more than thousands of degrees, and the corresponding pressure can reach the order of one million atmospheres. In order to accurately describe this process, the flow field motion under high temperature and high pressure should be treated as an effective viscous flow field. A large number of previous numerical simulation results show that the viscosity of the flow field material is one of the important factors affecting the duration of high temperature and high pressure conditions generated by implosion compression, the interface shape of fission metal materials, and the distribution of physical parameters inside fission metal materials. When quantitatively solving the dynamic equations of the viscous flow field, it is required to study the effective viscosity of certain metal materials under high temperature and high pressure conditions in advance. ②Key parameters in geodynamic research: The interior of the earth is in a state of high temperature and high pressure, with a core pressure of about 360GPa and a temperature of several thousand degrees. All kinds of geological activities (earthquakes, volcanic eruptions, etc.) felt by humans living on the surface of the earth are related to the properties and state of the materials inside the earth, as well as the movement of materials deep inside the earth caused by them. Therefore, the study of the physical properties of materials under high temperature and high pressure conditions provides theoretical support for humans to understand and try to avoid natural disasters.

[0004] In summary, the viscosity of condensed matter under high temperature and high pressure is one of the most critical physical parameters in the research fields of deep earth dynamics and explosion mechanics, but there are few relevant experimental measurement systems in the existing technical literature. In order to fill the gap in the prior art, the present invention provides a detection system for a sine wave surface sample light gas gun loading test that can detect the shear viscosity coefficient of metals under high temperature and high pressure. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a detection system for light gas gun loading test of sinusoidal wave surface samples. By analyzing the relationship between the installation position of the electric probe and the conduction time of the electric probe, the evolution law of the shock wave front disturbance amplitude can be obtained, and the oscillation attenuation law of the shock wave front disturbance amplitude can be obtained. Furthermore, the shear viscosity coefficient of the sample material under a given temperature and pressure environment can be analyzed, which is of great significance for in-depth analysis and research on the impact dynamics characteristics of the material.

[0006] The objective of the present invention is achieved through the following technical solutions:

[0007] A detection system for a light gas gun loading test of a sinusoidal wave surface sample, comprising a sinusoidal wave surface sample, a probe fixture, a heating sleeve, a trigger probe, a plurality of electric probes, a first resistance unit, a capacitor, a power supply and an oscilloscope, wherein the sinusoidal wave surface sample and the probe fixture are respectively arranged in the heating sleeve, the sinusoidal wave surface sample and the probe fixture are respectively wedge-shaped structures, and the wedge-shaped surface of the sinusoidal wave surface sample corresponds to the wedge-shaped surface of the probe fixture, an insulating layer is arranged on the wedge-shaped surface of the sinusoidal wave surface sample, the probe fixture is provided with a trigger probe hole and at least 3 columns of electric probe holes, and each column of electric probe holes is arranged corresponding to a wave crest or a wave trough of the sinusoidal wave surface sample;

[0008] One end of the trigger probe passes through the trigger probe hole and the sine wave surface sample in sequence, and the other end of the trigger probe is connected to the capacitor through the first resistor unit, and the capacitor is connected in parallel with the power supply;

[0009] The electric probes and the electric probe holes are arranged one by one, and one end of the electric probe passes through the electric probe hole, and the other end of the electric probe is connected to the second resistance unit. In each column of electric probes, according to the thickness of the sinusoidal wave surface sample, the second resistance units are connected in series from thick to thin to form a column of detection groups. The detection groups are connected to the capacitor through the first resistance unit, and the detection groups are arranged in parallel, and each detection group is connected to the oscilloscope through a recording cable channel.

[0010] Specifically, the probe of the trigger probe is located in the area accessible to the flying sheet on the surface of the sinusoidal wave surface sample.

[0011] Furthermore, the probe fixture is provided with a plurality of electric probe holes arranged in an array, the electric probe holes are arranged in at least 3 rows, and two adjacent rows of electric probe holes, one row is arranged corresponding to the peak of the sinusoidal wave surface sample, and the other row is arranged corresponding to the trough of the sinusoidal wave surface sample. Preferably, the electric probe holes are arranged near the thinner end of the sinusoidal wave surface sample.

[0012] Furthermore, the electric probe part and the trigger probe part located in the heating tube sleeve are respectively sleeved with heat insulating sleeves.

[0013] Furthermore, an annular limiting piece is provided on the inner wall of the heating tube sleeve, and the annular limiting piece abuts against the probe fixing piece.

[0014] Furthermore, the thickness of the insulating layer is not greater than 50 μm.

[0015] Furthermore, the electric probes are arranged in one-to-one correspondence with the electric probe holes, and one end of the electric probe passes through the electric probe hole, and the probes of all the electric probes are in the same plane with the wedge-shaped surface of the probe fixing piece.

[0016] Further, the detection group includes a third resistance unit, and the first resistance unit is connected to the second resistance unit through the third resistance unit.

[0017] Furthermore, the first resistance unit is connected to a second resistance unit located at the end.

[0018] Furthermore, the detection system includes two trigger probe holes and two trigger probes, and the trigger probes are arranged in parallel.

[0019] Furthermore, a temperature detection unit is provided on the inner wall of the heating tube sleeve.

[0020] The beneficial effects of the present invention are as follows: the detection system of the present invention for the light gas gun loading test of the sinusoidal wave surface sample can obtain the evolution law of the shock wave front disturbance amplitude by analyzing the relationship between the installation position of the electric probe and the conduction time of the electric probe, and obtain the oscillation attenuation law of the shock wave front disturbance amplitude. Furthermore, the shear viscosity coefficient of the sample material under a given temperature and pressure environment can be analyzed, and the shear viscosity coefficient of the metal under high temperature and high pressure can be detected, which is of great significance for the in-depth analysis and research of the dynamic characteristics of the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the detection system of the present invention;

[0022] Figure 2 This is a circuit connection diagram of a detection group of the present invention;

[0023] Figure 3 It is a schematic diagram of the installation and connection of the electric probe and the probe fixing member of the present invention;

[0024] Figure 4 It is a schematic diagram of the structure of the probe fixing member of the present invention;

[0025] In the figure, 1-sine wave surface sample, 2-probe fixing part, 3-heating tube sleeve, 4-trigger probe, 5-electric probe, 6-first resistance unit, 7-capacitor, 8-power supply, 9-oscilloscope, 10-trigger probe hole, 11-electric probe hole, 12-second resistance unit, 13-third resistance unit, 14-detection group, 15-insulating layer, 17-insulating sleeve, 18-annular limiter, 19-flying piece. DETAILED DESCRIPTION

[0026] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following.

[0027] like Figure 1 to Figure 4 As shown, a detection system for a light gas gun loading test of a sinusoidal wave surface sample comprises a sinusoidal wave surface sample 1, a probe fixture 2, a heating sleeve 3, a trigger probe 4, a plurality of electric probes 5, a first resistor unit 6, a capacitor 7, a power supply 8 and an oscilloscope 9, wherein the sinusoidal wave surface sample 1 and the probe fixture 2 are respectively arranged in the heating sleeve 3, the sinusoidal wave surface sample 1 and the probe fixture 2 are respectively wedge-shaped structures, and the wedge-shaped surface of the sinusoidal wave surface sample 1 corresponds to the wedge-shaped surface of the probe fixture 2, a conductive layer is arranged on the wedge-shaped surface of the sinusoidal wave surface sample 1, a trigger probe hole 10 and at least 3 columns of electric probe holes 11 are arranged on the probe fixture 2, and each column of the electric probe holes 11 is arranged corresponding to the peak or trough of the sinusoidal wave surface sample 1,

[0028] One end of the trigger probe 4 passes through the trigger probe hole 10 and the sine wave surface sample 1 in sequence, and the other end of the trigger probe 4 is connected to the capacitor 7 through the first resistor unit 6, and the capacitor 7 is connected in parallel with the power supply 8;

[0029] The electric probe 5 is arranged in one-to-one correspondence with the electric probe hole 11, and one end of the electric probe 5 passes through the electric probe hole 11, and the other end of the electric probe 5 is connected to the second resistance unit 12. In each column of the electric probe 5, according to the thickness of the sinusoidal wave surface sample 1, the second resistance units 12 are connected in series from thick to thin to form a column of detection groups 14. The detection group 14 is connected to the capacitor through the first resistance unit 6. The detection groups 14 are arranged in parallel, and each detection group 14 is connected to the oscilloscope 9 through a recording cable channel.

[0030] Specifically, the probe of the trigger probe 4 is located in the area where the flying sheet 19 can reach the surface of the sinusoidal wave surface sample 1 .

[0031] Specifically, the probe fixture 2 is provided with a plurality of electric probe holes 11 arranged in an array, and the electric probe holes 11 are arranged in at least three rows, and two adjacent rows of electric probe holes 11, one row is arranged corresponding to the wave crest of the sinusoidal wave surface sample 1, and the other row is arranged corresponding to the wave trough of the sinusoidal wave surface sample 1. Preferably, the electric probe holes 11 are arranged near the thinner end of the sinusoidal wave surface sample 1.

[0032] Specifically, the electric probe 5 and the trigger probe 4 in the heating tube sleeve 3 are respectively sleeved with a heat insulating sleeve 17. Preferably, the heat insulating sleeve 17 has an insulating property.

[0033] Specifically, an annular stopper 18 is disposed on the inner wall of the heating tube sleeve 3 , and the annular stopper 18 abuts against the probe fixing member 2 .

[0034] Specifically, the thickness of the insulating layer is no more than 50 μm.

[0035] Preferably, the flyer 19 of the light gas gun is made of metal.

[0036] Specifically, the electric probes 5 are arranged in one-to-one correspondence with the electric probe holes 11, and one end of the electric probe 5 passes through the electric probe hole 11, and the probes of all the electric probes 5 are in the same plane with the wedge-shaped surface of the probe fixture 2. Specifically, the insulating layer 15 abuts against the wedge-shaped surface of the probe fixture 2.

[0037] Specifically, the detection group 14 includes a third resistor unit 13, and the first resistor unit 6 is connected to the second resistor unit 12 via the third resistor unit 13. Preferably, in the detection group 14, the intervals between adjacent electrical probes 5 are equal.

[0038] Specifically, the first resistance unit 6 is connected to the second resistance unit 12 located at the end.

[0039] Specifically, the detection system includes two trigger probe holes 10 and two trigger probes 4 , and the trigger probes 4 are arranged in parallel.

[0040] Specifically, a temperature detection unit is provided on the inner wall of the heating tube sleeve 3 .

[0041] Specifically, the probe fixing member 2 is made of insulating material.

[0042] When in use, set up the detection system, and then control the heating sleeve 3 to work, so that the sinusoidal wave surface sample 1 is in a predetermined temperature environment. Since the probe is protected by the insulating sleeve 17, the probe is effectively protected from changes in ambient temperature. Then start the light gas gun to send flying pieces 19 to hit the sinusoidal wave surface of the sinusoidal wave surface sample 1. When the flying pieces 19 hit the sample 1, the probe 4 is triggered to turn on, and the oscilloscope 9 is triggered, and the time point when the oscilloscope 9 is triggered is used as the starting point of time. Then, as the shock wave reaches the wedge-shaped measuring surface of the sample 1, the electric probe 5 is turned on in turn according to the different thicknesses of the sample 1. Due to the shunt short-circuit effect of the electric probe 5, the voltage divider resistance decreases in turn, and the oscilloscope records The recorded voltage amplitude will be reduced in sequence, and each time point when each electric probe 5 is turned on will be recorded. In a preferred embodiment, the resistance value of each second resistor unit 12 in the detection group 14 can be reasonably selected so that the voltage drop amplitude caused by each second resistor unit 12 when it is turned on is basically equal, which is convenient for interpretation; then, by analyzing the relationship between the installation position of the electric probe 5 and the turn-on time of the electric probe 5, the evolution law of the shock wave front disturbance amplitude can be obtained, and the oscillation attenuation law of the shock wave front disturbance amplitude can be obtained. Further, the shear viscosity coefficient of the sample material under a given temperature environment can be analyzed, which is of great significance for in-depth analysis and research on the impact dynamics characteristics of the material.

[0043] The above is only a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art shall not deviate from the spirit and scope of the present invention, and shall be within the scope of protection of the claims attached to the present invention.

Claims

1. A detection system for a light gas gun loading test of a sinusoidal wave surface sample, characterized in that: The invention comprises a sinusoidal wave surface sample, a probe fixture, a heating sleeve, a trigger probe, a plurality of electric probes, a first resistance unit, a capacitor, a power supply and an oscilloscope, wherein the sinusoidal wave surface sample and the probe fixture are respectively arranged in the heating sleeve, the sinusoidal wave surface sample and the probe fixture are respectively wedge-shaped structures, and the wedge-shaped surface of the sinusoidal wave surface sample corresponds to the wedge-shaped surface of the probe fixture, an insulating layer is arranged on the wedge-shaped surface of the sinusoidal wave surface sample, the probe fixture is provided with a trigger probe hole and at least 3 columns of electric probe holes, and each column of electric probe holes is arranged corresponding to a wave crest or a wave trough of the sinusoidal wave surface sample; One end of the trigger probe passes through the trigger probe hole and the sine wave surface sample in sequence, and the other end of the trigger probe is connected to a capacitor, and the capacitor is connected in parallel with a power supply; The electric probes are arranged in one-to-one correspondence with the electric probe holes, and one end of the electric probe passes through the electric probe hole, and the other end of the electric probe is connected to the second resistance unit, and the probe heads of all the electric probes are in the same plane with the wedge-shaped surface of the probe fixing member; in each column of the electric probes, the second resistance units are sequentially connected in series from thick to thin according to the thickness of the sinusoidal wave surface sample to form a column of detection groups, and the detection groups are connected to the capacitor through the first resistance unit, and the detection groups are arranged in parallel, and each detection group is connected to the oscilloscope through a recording cable channel; The probe fixing member is provided with a plurality of electric probe holes arranged in an array, the electric probe holes are arranged in at least 3 rows, and one row of the two adjacent rows of electric probe holes is arranged corresponding to the peak of the sinusoidal wave surface sample, and the other row is arranged corresponding to the trough of the sinusoidal wave surface sample; An annular limiting piece is arranged on the inner wall of the heating tube sleeve, and the annular limiting piece is in contact with the probe fixing piece.

2. A detection system for a light gas gun loading test of a sinusoidal wave surface sample according to claim 1, characterized in that: The electric probe part and the trigger probe part located in the heating tube sleeve are respectively sleeved with heat insulating sleeves.

3. A detection system for a light gas gun loading test of a sinusoidal wave surface sample according to claim 1, characterized in that: The thickness of the insulating layer is no more than 50 μm.

4. A detection system for a light gas gun loading test of a sinusoidal wave surface sample according to claim 1, characterized in that: The detection group includes a third resistance unit, and the first resistance unit is connected to the second resistance unit through the third resistance unit.

5. The detection system for a light gas gun loading test of a sinusoidal wave surface sample according to claim 1 is characterized in that: The first resistance unit is connected to a second resistance unit located at an end portion.

6. A detection system for a light gas gun loading test of a sinusoidal wave surface sample according to claim 1, characterized in that: The detection system comprises two trigger probe holes and two trigger probes, and the trigger probes are arranged in parallel.

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