Ground-based simulation device and method for material superspeed condition and particle triboelectrification

Abstract

The invention discloses a material superspeed condition and particle friction electrification ground simulation device and method, and relates to the field of static electricity, the device comprises a projectile ejection device, a projectile flight track, a grounding ring, a first Faraday cup, a projectile friction zone and a second Faraday cup which are arranged in sequence; the projectile flight orbit, the first Faraday cup, the projectile friction area and the second Faraday cup are all arranged on the flight orbit of the measured projectile; one end of the grounding ring is connected with one end, close to the first Faraday cylinder, of the projectile flight orbit; the accelerated to-be-tested projectile passes through the first Faraday cup, the projectile friction area and the second Faraday cup in sequence; the first Faraday cylinder and the second Faraday cylinder are both used for sensing the charge of the measured projectile; and the projectile friction area is used for carrying out a friction experiment on the tested material. According to the invention, the triboelectrification rule of the flying body in the flying process can be accurately simulated.

Description

Technical Field

[0001] The invention relates to the field of electrostatic technology, and in particular to a ground simulation device and method for friction electrification of materials under ultra-high-speed conditions and particles. Background Art

[0002] When an aircraft is flying at high speed, it is inevitable that it will collide and rub against surrounding materials and carry static electricity. When the static electricity level of the aircraft reaches a certain level, electrostatic discharge (ESD) will occur. The discharge energy will produce complex electrostatic effects on the onboard equipment through conduction and radiation coupling, thereby affecting the flight safety of the aircraft.

[0003] In order to study the influence of electrostatic discharge generated by high-speed aircraft on airborne electronic equipment, we must first study the characteristics of static electricity charge level and polarity. During the high-speed flight of an aircraft, its surface skin material is frictionally charged with materials such as ice crystals and gravel. The amount of static electricity after friction charging is related to the surface material of the aircraft, the flight speed and the collision particles (ice crystals, gravel, etc.). Since it is impossible to test the actual flight process of the aircraft, it is necessary to design a ground simulation experimental device to study the law of friction charging during the high-speed flight of the aircraft. Summary of the invention

[0004] The purpose of the present invention is to provide a ground simulation device and method for material ultra-high speed conditions and particle friction electrification, which can accurately simulate the friction electrification law of a flying body during flight.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] A ground simulation device for material ultra-high-speed condition and particle friction electrification, comprising: a projectile ejection device, a projectile flight track, a grounding ring, a first Faraday cage, a projectile friction zone, and a second Faraday cage, which are arranged in sequence;

[0007] The projectile ejecting device is used to eject the projectile to be tested; the projectile flight track, the first Faraday cage, the projectile friction zone and the second Faraday cage are all arranged on the flight track of the projectile to be tested; one end of the grounding ring is connected to one end of the projectile flight track close to the first Faraday cage; the other end of the grounding ring is grounded; the material to be tested is arranged on the projectile to be tested; the projectile flight track is used to accelerate the projectile to be tested; the accelerated projectile to be tested passes through the first Faraday cage, the projectile friction zone and the second Faraday cage in sequence; the first Faraday cage and the second Faraday cage are both used to sense the charge of the projectile to be tested; the projectile friction zone is used to perform a friction experiment on the material to be tested.

[0008] Optionally, a projectile clamp is also included; the projectile clamp is used to clamp the projectile to be tested in the projectile flight track and release the projectile to be tested at the exit of the projectile flight track.

[0009] Optionally, the shot clamp is a metal clamp.

[0010] Optionally, the projectile ejection device is a gas rail gun or an electromagnetic gun.

[0011] Optionally, a speed tester is further included, which is arranged between the projectile flight track and the first Faraday cage; the speed tester is used to monitor the speed of the tested projectile after acceleration.

[0012] Optionally, it further includes a first electrostatic tester and a second electrostatic tester;

[0013] The first electrostatic tester is connected to the first Faraday cup; the second electrostatic tester is connected to the second Faraday cup.

[0014] Optionally, an oscilloscope is also included; the oscilloscope is connected to the first electrostatic tester and the second electrostatic tester respectively.

[0015] Optionally, the projectile friction zone includes a friction zone shell, a fan, a perforated baffle, a funnel and collision particles; the fan is arranged in the friction zone shell; the funnel is arranged on one side of the friction zone shell and connected to the friction zone shell through the perforated baffle; the collision particles are filled into the friction zone shell through the funnel.

[0016] Optionally, there are four fans, which are respectively arranged in four corners of the friction zone housing.

[0017] A method for simulating ground conditions of material ultra-high speed conditions and friction electrification of particles, the method for simulating ground conditions of material ultra-high speed conditions and friction electrification of particles is applied to the device for simulating ground conditions of material ultra-high speed conditions and friction electrification of particles, and the method for simulating ground conditions of material ultra-high speed conditions and friction electrification of particles comprises:

[0018] The projectile ejection device ejects the projectile to be tested;

[0019] The projectile flight trajectory accelerates the projectile under test;

[0020] The charge of the projectile under test after being accelerated by the first Faraday cage;

[0021] The projectile friction zone performs a friction test on the projectile under test;

[0022] The second Faraday cage senses the charge of the measured projectile after friction.

[0023] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0024] The invention provides a ground simulation device for material ultra-high-speed conditions and particle friction electrification, comprising: a projectile ejecting device, a projectile flight track, a grounding ring, a first Faraday cage, a projectile friction zone and a second Faraday cage which are arranged in sequence; the projectile ejecting device is used to eject the projectile to be tested; the projectile flight track, the first Faraday cage, the projectile friction zone and the second Faraday cage are all arranged on the flight track of the projectile to be tested; one end of the grounding ring is connected to one end of the projectile flight track close to the first Faraday cage; the other end of the grounding ring is grounded; the material to be tested is arranged on the projectile to be tested; the projectile flight track is used to accelerate the projectile to be tested; the accelerated projectile to be tested passes through the first Faraday cage, the projectile friction zone and the second Faraday cage in sequence; the first Faraday cage and the second Faraday cage are both used to sense the charge of the projectile to be tested; the projectile friction zone is used to perform a friction experiment on the material to be tested. The initial charge of the projectile under test is reset to zero through the grounding ring, thereby accurately simulating the friction electrification law of the flying body during flight. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention 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 invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A schematic diagram of a ground simulation device for material ultra-high speed conditions and particle friction electrification provided by the present invention;

[0027] Figure 2 This is a schematic diagram of the projectile fixture;

[0028] Figure 3 Schematic diagram of the projectile friction zone.

[0029] Explanation of symbols:

[0030] Projectile ejection device-1, projectile flight track-2, grounding ring-3, speed tester-4, projectile to be tested-5, first Faraday cage-6, first electrostatic tester-7, oscilloscope-8, projectile friction zone-9, second electrostatic tester-10, second Faraday cage-11, collision particles-12, funnel-13, baffle with holes-14, fan-15. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] The purpose of the present invention is to provide a ground simulation device and method for material ultra-high speed conditions and particle friction electrification, which can accurately simulate the friction electrification law of a flying body during flight.

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] The present invention proposes a ground simulation device and test method for material ultra-high-speed conditions and particle friction electrification to complete the ground simulation test of friction electrification of high-speed flying body surface materials, thereby obtaining the friction electrification law and providing technical support for the electrostatic safety analysis of high-speed flying bodies. Figure 1 As shown, the present invention provides a ground simulation device for material ultra-high-speed conditions and particle friction electrification, comprising: a projectile ejection device 1, a projectile flight track 2, a grounding ring 3, a first Faraday cage 6, a projectile friction zone 9 and a second Faraday cage 11 which are arranged in sequence.

[0035] The projectile ejecting device 1 is used to eject the projectile 5 to be tested; the projectile flight track 2, the first Faraday cage 6, the projectile friction zone 9 and the second Faraday cage 11 are all arranged on the flight track of the projectile 5 to be tested; one end of the grounding ring 3 is connected to the end of the projectile flight track 2 close to the first Faraday cage 6; the other end of the grounding ring 3 is grounded; the material to be tested is arranged on the projectile 5 to be tested; the projectile flight track 2 is used to accelerate the projectile 5 to be tested; the accelerated projectile 5 to be tested passes through the first Faraday cage 6, the projectile friction zone 9 and the second Faraday cage 11 in turn; the first Faraday cage 6 and the second Faraday cage 11 are both used to sense the charge of the projectile 5 to be tested; the projectile friction zone 9 is used to perform a friction experiment on the material to be tested.

[0036] Grounding ring 3 is used to eliminate the initial charge of the test material at the exit of the projectile flight track 2. Grounding ring 3 is set at Figure 1 The exit of the projectile flight track 2 is specifically a metal ring, which is grounded.

[0037] For metal projectiles, because they are conductive materials, they can be electrified by friction during the track acceleration process through a metal ring. When they come into contact with the grounding ring 3 at the exit of the track acceleration, the initial charge of the metal projectile is reset to zero, which has no effect on the value of the subsequent electrification caused by collision with particles.

[0038] The ground simulation device for material ultra-high speed condition and particle friction electrification also includes a projectile clamp; the projectile clamp is used to clamp the projectile 5 to be tested in the projectile flight track 2 and release the projectile 5 to be tested at the exit of the projectile flight track 2. The projectile clamp is a metal clamp. The design of the projectile clamp is to clamp the projectile with two separable metal clamps, and at the exit of the acceleration track, the clamps are separated from each other, and the projectile continues to fly forward.

[0039] The projectile ejection device 1 is a gas rail gun or an electromagnetic gun. The projectile ejection device 1 is a high-speed ejection device, which is used to eject the material to be tested at a high speed, so that the test material has a sufficient initial velocity, and can set different flight speeds. This function can be achieved by a gas rail gun or an electromagnetic gun, which can make the test material reach a speed of more than 3Ma.

[0040] The projectile flight track 2 is used in conjunction with a gas rail gun or an electromagnetic gun to accelerate the test material. The test material is accelerated within the flight track to reach a desired flight speed.

[0041] The ground simulation device for material ultra-high-speed conditions and particle friction electrification also includes a speed tester 4, which is arranged between the projectile flight track 2 and the first Faraday cage 6; the speed tester 4 is used to monitor the speed of the measured projectile 5 after acceleration.

[0042] The ground simulation device for material ultra-high-speed conditions and particle friction electrification also includes a first electrostatic tester 7 and a second electrostatic tester 10; the first electrostatic tester 7 is connected to the first Faraday cup 6; the second electrostatic tester 10 is connected to the second Faraday cup 11.

[0043] The ground simulation device for material ultra-high speed condition and particle friction electrification also includes an oscilloscope 8; the oscilloscope 8 is connected to the first electrostatic tester 7 and the second electrostatic tester 10 respectively.

[0044] The Faraday cup, the electrostatic tester and the oscilloscope 8 together constitute a test system to complete the test of the electrostatic charge of the high-speed test material.

[0045] like Figure 3As shown, the projectile friction zone 9 includes a friction zone shell, a fan 15, a baffle plate with holes 14, a funnel 13 and collision particles 12; the fan 15 is arranged in the friction zone shell; the funnel 13 is arranged on one side of the friction zone shell and connected to the friction zone shell through the baffle plate with holes 14; the collision particles 12 are filled into the friction zone shell through the funnel 13. There are four fans 15, which are respectively arranged in the four corners of the friction zone shell. The projectile friction zone 9 is used to add ice crystals, gravel and other granular materials in this area to complete the friction experiment between the surface material of the flying body and different granular materials. There are particles suspended in the projectile friction zone 9, and the projectile collides with the particles in the process of passing through these particles and carries static electricity. The high-speed projectile enters the friction zone from the left side and exits from the right side, and collides with the particles inside the friction zone and carries static electricity.

[0046] Different types of flying body surface materials are wrapped on the projectile surface to test the triboelectric charging of different materials.

[0047] During the test, a gas rail gun system or an electromagnetic gun system is used in conjunction with the test material flight track to shoot a projectile wrapped around the material to be tested at a certain speed, and a speed tester 4 is used to test and record the flight speed of the projectile; the projectile first passes through a horizontal Faraday cage, and an electrostatic tester and an oscilloscope 8 are used to monitor the charge of the high-speed projectile just after it flies out of the pipeline; then the projectile flies through a friction zone filled with materials such as ice crystals or gravel, and the projectile rubs against the ice crystals or gravel in the area, causing the charge to change; the projectile passes through the Faraday cage again, and an electrostatic tester and an oscilloscope 8 are used to test the charge after passing through the friction zone; the charges measured twice before and after are compared and analyzed, and the electrostatic charge generated by the friction between the material and different materials can be obtained, thereby obtaining the electrostatic charging law of different materials rubbing against different materials at different flight speeds.

[0048] The present invention uses a gas rail gun or an electromagnetic gun in conjunction with a projectile flight track 2 to accelerate the projectile, which can control the different flight speeds of the projectile, and the maximum flight speed can reach more than 3Ma, and can complete ground simulation experimental tests on the friction electrification of materials and particles under ultra-high speed conditions.

[0049] The present invention aims to solve the bottleneck problem of the difficulty in measuring the friction electrification of the surface materials of ultra-high-speed aircraft in the air, and proposes a ground simulation experimental device and method for the collision and friction between materials and particles under ultra-high-speed conditions. The present invention adopts a special method of wrapping the material to be tested on the surface of the projectile, and uses a metal shell fixture to wrap the material to be tested in high-speed flight. Figure 2As shown, the ultra-high-speed acceleration of the material and the elimination of the initial charge of the material can be achieved, and the friction electrification test of different materials can be completed, thereby realizing the experimental test of the friction electrification law of different flying bodies and different surface materials; there are two ways to wrap the projectile. For the material to be tested that is convenient to be processed into the form of a projectile, a metal fixture is used to clamp the projectile inside the fixture. For the material to be tested that is not convenient to be processed into the shape of a projectile, the material to be tested is wrapped on the outside of the projectile by coating and spraying to accelerate the material to be tested at high speed. The metal fixture is accelerated with the projectile and separated at the exit of the projectile flight track 2. Because the acceleration part uses the electromagnetic gun principle to accelerate, the fixture must be made of metal material and the inside of the wrapped projectile is made of metal material. Under this premise, the entire projectile can be accelerated at high speed. The metal fixture is used to realize the acceleration of the electromagnetic gun. The front end of the fixture is separated at an angle. Due to the extremely high speed and air resistance, it will separate when accelerated to a certain extent.

[0050] For high-speed metal materials that need to be measured, a grounding ring 3 is added at the end of the flight track to eliminate the influence of the initial charge of the test material at the exit of the acceleration pipe on the test.

[0051] The test method of comparing the electrostatic charge using two Faraday cups eliminates the interference charge caused by the friction between the test material and the particles.

[0052] The projectile friction zone 9 uses fans 15 in four directions to blow particles scattered from the funnel 13 to achieve uniform distribution of the particles and a suspended state of the particles, and can simulate the collision and friction between materials and different types of particles under high-speed conditions.

[0053] The test material is wrapped around the outer surface of the projectile. The cross-sectional area of ​​the test material in the present invention is 132.665 mm 2 ,By changing the size of the projectile, the cross-sectional area of ​​the wrapped test material can be modified, thereby realizing the electrostatic electrification test of the collision and friction between the particles and the test materials of different cross-sectional areas.

[0054] The present invention can complete a ground simulation method for the friction electrification law of materials and particles under ultra-high-speed conditions, and simply solves the bottleneck problem of ultra-high-speed ground simulation of different materials and different particles.

[0055] The present invention also provides a method for simulating the ground conditions of ultra-high-speed material and friction electrification of particles. The method is applied to the device for simulating the ground conditions of ultra-high-speed material and friction electrification of particles. The method comprises:

[0056] The projectile ejecting device ejects the projectile to be tested.

[0057] The projectile flight trajectory accelerates the projectile being tested.

[0058] The first Faraday cage senses the charge of the accelerated projectile.

[0059] The projectile friction zone performs a friction test on the projectile under test.

[0060] The second Faraday cage senses the charge of the measured projectile after friction.

[0061] The present invention can complete ground simulation tests on friction electrification of surface materials of high-speed flying bodies, thereby obtaining the law of friction electrification and providing technical support for electrostatic safety analysis of high-speed flying bodies.

[0062] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0063] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the device and its core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, 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 the present invention.

Claims

1. A ground simulation device for material ultra-high-speed conditions and particle friction electrification, characterized in that: include: A projectile ejection device, a projectile flight track, a grounding ring, a first Faraday cage, a projectile friction zone, and a second Faraday cage are sequentially arranged; The projectile ejection device is used to eject the projectile to be tested; the projectile flight track, the first Faraday cage, the projectile friction zone and the second Faraday cage are all arranged on the flight track of the projectile to be tested; one end of the grounding ring is connected to an end of the projectile flight track close to the first Faraday cage; the other end of the grounding ring is grounded; the material to be tested is arranged on the projectile to be tested; the projectile flight track is used to accelerate the projectile to be tested; After being accelerated, the projectile to be tested passes through the first Faraday cage, the projectile friction zone and the second Faraday cage in sequence; the first Faraday cage and the second Faraday cage are both used to sense the charge of the projectile to be tested; the projectile friction zone is used to perform a friction experiment on the material to be tested.

2. The device for simulating the ultra-high-speed conditions and particle friction electrification of materials according to claim 1, characterized in that: It also includes a projectile clamp; the projectile clamp is used to clamp the projectile to be tested in the projectile flight track and release the projectile to be tested at the exit of the projectile flight track.

3. The device for simulating the ultra-high-speed conditions and particle friction electrification of materials according to claim 2, characterized in that: The projectile clamp is a metal clamp.

4. The device for simulating the ultra-high-speed conditions and particle friction electrification of materials according to claim 1, characterized in that: The projectile ejection device is a gas rail gun or an electromagnetic gun.

5. The ground simulation device for material ultra-high speed conditions and particle friction electrification according to claim 1, characterized in that: It also includes a speed tester, which is arranged between the projectile flight track and the first Faraday cage; the speed tester is used to monitor the speed of the accelerated projectile.

6. The device for simulating the ultra-high-speed conditions and particle friction electrification of materials according to claim 1, characterized in that: Also included is a first electrostatic tester and a second electrostatic tester; The first electrostatic tester is connected to the first Faraday cup; the second electrostatic tester is connected to the second Faraday cup.

7. The device for simulating the ultra-high-speed conditions and particle friction electrification of a material according to claim 6, characterized in that: It also includes an oscilloscope; the oscilloscope is connected to the first electrostatic tester and the second electrostatic tester respectively.

8. The device for simulating the ultra-high-speed conditions and particle friction electrification of materials according to claim 1, characterized in that: The projectile friction zone includes a friction zone shell, a fan, a perforated baffle, a funnel and collision particles; the fan is arranged in the friction zone shell; the funnel is arranged on one side of the friction zone shell and is connected to the friction zone shell through the perforated baffle; the collision particles are filled into the friction zone shell through the funnel.

9. The device for simulating the ultra-high-speed conditions and particle friction electrification of materials according to claim 8, characterized in that: The number of the fans is four, and they are respectively arranged in the four corners of the outer shell of the friction zone.

10. A method for simulating the ground electrification of particles under ultra-high-speed conditions, characterized in that: The method for simulating the ground conditions of ultra-high-speed material and friction electrification of particles is applied to the device for simulating the ground conditions of ultra-high-speed material and friction electrification of particles according to any one of claims 1 to 9, and the method for simulating the ground conditions of ultra-high-speed material and friction electrification of particles comprises: The projectile ejection device ejects the projectile to be tested; The projectile flight trajectory accelerates the projectile under test; The charge of the projectile under test after being accelerated by the first Faraday cage; The projectile friction zone performs a friction test on the projectile under test; The second Faraday cage senses the charge of the measured projectile after friction.

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