A visible light target calibration device and target calibration method for light gas gun loading experiment

Abstract

The present invention discloses a visible light target calibration device for a light gas gun loading experiment, comprising a gun barrel of a light gas gun and a target plate matched with the gun barrel, a sample box being provided on the target plate, and a calibration mechanism and an indication mechanism being provided on the target plate, the calibration mechanism connecting the target plate and the sample box, the indication mechanism comprising a laser and a target calibration sabot, the laser being placed at the center of the sample box, the target calibration sabot being loaded in the gun barrel, and the laser being matched with the target calibration sabot. The present invention also discloses a target calibration method for the above-mentioned visible light target calibration device. The visible light target calibration device and the target calibration method for a light gas gun loading experiment of the present invention replace the mechanical target calibration rod, thereby making the target calibration work simpler, the actual operation convenient, and greatly improving the target calibration accuracy and efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of impact test equipment, and in particular relates to a visible light target calibration device and a target calibration method for a light gas gun loading experiment. Background Art

[0002] Dynamic high pressure technology has important applications in the fields of earth and planetary science, space science, and new materials. In the principle of dynamic high pressure generation, high-speed flying pieces will often hit a stationary target plate to generate a high temperature and high pressure environment. Using a light gas gun to drive flying pieces for loading experiments is the most widely used method of dynamic high pressure experiments. Most light gas gun experiments are flat plate impact experiments, which use light gas guns to drive flying pieces to hit the target plate to generate a plane shock wave and achieve plane shock wave loading on the sample. Therefore, it is necessary to ensure that the flying piece plane is parallel to the target surface and on the same axis. If there is an inclination angle or deviation from the axis between the flying piece plane and the target surface, the flying piece hits the target surface at a certain inclination angle, forming an inclined shock wave front, which affects the measurement accuracy of the impact loading experiment and even leads to the failure of the impact loading experiment. The process of calibrating the flying piece plane and the target surface is called target calibration in the light gas gun loading experiment.

[0003] At present, the loading experiments of light gas guns all adopt the method of mechanical target calibration. The target calibration rod is inserted into the launch tube of the light gas gun, and then the centering screw and the leveling screw are adjusted by using a knife edge ruler and a flashlight so that the target surface and the end face of the target calibration rod are on the same axis. Mechanical target calibration often requires the cooperation of two people, one person to light the light, and the other person to adjust the centering screw and the leveling screw by observing the gap between the knife edge ruler and the end face of the target calibration rod. Mechanical target calibration often requires personal experience, which is not friendly to novice operation. The quality of novice target calibration is often uneven, affecting the accuracy of the experiment. Mechanical target calibration itself has some defects. Mechanical target calibration calibrates the end face of the launch tube and the target surface, not the plane where the flying piece is located. Secondly, the target calibration rod has a certain length. It is necessary to ensure the cylindricality of the target calibration rod, the flatness of the end face of the target calibration rod, and the verticality of the axis of the target calibration rod. Therefore, the precision requirements for the target calibration rod processing are very strict. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a visible light target calibration device and a target calibration method for light gas gun loading experiments, which are simple to operate and can be completed by one person, and have greatly improved target calibration accuracy and efficiency.

[0005] The technical solution of the present invention to solve the above technical problems is:

[0006] A visible light target calibration device for a light gas gun loading experiment comprises a gun barrel of the light gas gun and a target plate matched with the gun barrel, a sample box is arranged on the target plate, a calibration mechanism and an indication mechanism are also arranged on the target plate, the calibration mechanism connects the target plate and the sample box, the indication mechanism comprises a laser and a target calibration sabot, the laser is placed at the center of the sample box, the target calibration sabot is loaded in the gun barrel, and the laser matches the target calibration sabot.

[0007] Specifically, the calibration mechanism includes a calibration target ring, which is fixed to the target plate via a leveling screw, and the sample box is fixed to the calibration target ring via a centering screw, the leveling screw is horizontally arranged, and the centering screw is vertically arranged.

[0008] Specifically, an outer edge of the sample box is provided with an inclined groove matching the centering screw.

[0009] Preferably, a rubber pad is provided between the target calibration ring and the target plate.

[0010] Preferably, there are three leveling screws and three centering screws, three screw holes that match the leveling screws are provided on the front of the target ring, three locking through holes that pass through the target ring are provided on the side of the target ring, and the centering screw spirally passes through the locking through holes and cooperates with the inclined groove to fix the sample box.

[0011] Specifically, the indicating mechanism also includes a collimation ring, an impact hole for impacting the sample is opened in the middle of the sample box, the collimation ring and the impact hole match each other, the laser is loaded at the center of the collimation ring and the light beam emitted by the laser can pass through the collimation ring and be projected onto the target cartridge.

[0012] Specifically, a center hole and a light-transmitting hole are opened at the center of the collimating ring, the center hole is communicated with the light-transmitting hole and cooperates to penetrate the collimating ring, the laser is installed in the center hole and the light-emitting port matches the light-transmitting hole.

[0013] Preferably, a placement groove for placing samples is opened on the rear side of the sample box, the impact hole is connected to the placement groove, and a mounting buckle matching the placement window is provided on the periphery of the collimation ring, and the collimation ring is fixed to the sample box through the mounting buckle.

[0014] Specifically, a reflective plane mirror is provided at the center of the plane of the target calibration cartridge facing the target plate, the reflective plane mirror matches the laser, and a bolt hole for control is provided on the side of the target calibration cartridge opposite to the side where the reflective plane mirror is provided.

[0015] The present invention also provides a target calibration method for the above visible light target calibration device, comprising the following steps:

[0016] Install the calibration target cartridge, connect the bolt holes of the calibration target cartridge through screws, and put the calibration target cartridge into the barrel of the light gas gun, so that the reflective plane mirror on the calibration target cartridge faces the target plate;

[0017] Install the calibration mechanism, place the calibration ring on the corresponding position of the target plate, insert the rubber ring at the connection and tighten it with the leveling screw, place the sample box in the calibration ring, and insert the centering screw to fix the sample box;

[0018] Install the collimation ring and place it in the sample box;

[0019] Install the laser and insert it into the center hole of the collimation ring so that the laser's light outlet is facing the barrel through the light-transmitting hole;

[0020] Calibration: Power the laser to make it emit a laser beam, project it onto the reflective plane mirror, and then project it onto the collimation ring after being reflected by the reflective plane mirror. Adjust the centering screw and the leveling screw accordingly to make the projected laser beam coincide with the reflected laser beam, thus completing the calibration.

[0021] Remove the indicating mechanism, disconnect the power supply of the laser, remove the laser and remove the collimation ring, and finally remove the target cartridge from the gun barrel via the screw.

[0022] The present invention has the following beneficial effects: by providing an indicating mechanism to replace the mechanical target calibration rod, the target calibration work is made simpler, the linear propagation of the laser beam meets the high-precision requirement, and the difficulty of adjusting the target calibration rod is avoided; at the same time, by observing the propagation path of the laser beam, the target plate and the gun barrel can be accurately aligned by adjusting the adjustment mechanism directly, the actual operation is simple, and the target calibration accuracy and efficiency are greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall cross-sectional structure of an embodiment of the present invention.

[0024] Figure 2 It is a schematic diagram of the front structure of the target calibration ring in an embodiment of the present invention.

[0025] Figure 3 Schematic diagram of the cross-sectional structure of the sample box in an embodiment of the present invention.

[0026] Figure 4 Schematic diagram of the cross-sectional structure of the collimating ring in an embodiment of the present invention.

[0027] Figure 5 It is a schematic diagram of the cross-sectional structure of the target calibration cartridge case in an embodiment of the present invention.

[0028] The meanings of the serial numbers in the accompanying drawings are as follows:

[0029] 1 gun barrel, 2 target calibration cartridge holder, 21 bolt hole, 22 mounting slot, 3 reflecting plane mirror, 4 target plate, 41 leveling screw, 42 rubber ring, 5 target calibration ring, 51 screw hole, 52 locking through hole, 53 centering screw, 6 sample box, 61 placement slot, 62 impact hole, 63 inclined groove, 7 collimation ring, 71 center hole, 72 light transmission hole, 73 mounting buckle, 8 laser. DETAILED DESCRIPTION

[0030] The present invention is described in detail below with reference to the accompanying drawings.

[0031] Example:

[0032] A visible light target calibration device for a light gas gun loading experiment according to an embodiment of the present invention is as follows Figure 1-5 As shown, it includes a barrel 1 of a light gas gun and a target plate 4 matched with the barrel 1, a sample box 6 is provided on the target plate 4, and a calibration mechanism and an indication mechanism are also provided on the target plate 4, the calibration mechanism connects the target plate 4 and the sample box 6, and the indication mechanism includes a laser 8 and a calibration target butt 2, the laser 8 is placed at the center of the sample box 6, the calibration target butt 2 is loaded in the barrel 1, and the laser 8 matches the calibration target butt 2. The laser beam emitted by the laser 8 irradiates the calibration target butt 2, and then calibrates through the calibration mechanism, so that the relative angle between the target plate 4 and the barrel 1 is simply and conveniently calibrated, and the purpose of rapid calibration is achieved.

[0033] Specifically, the calibration mechanism includes a calibration ring 5, which is fixed to the target plate 4 by a leveling screw 41, and the sample box 6 is fixed to the calibration ring 5 by a centering screw 53, wherein the leveling screw 41 is arranged horizontally, and the centering screw 53 is arranged vertically. Specifically, an inclined groove 63 matching the centering screw 53 is arranged at the outer edge of the sample box 6, and the centering screw 53 is screwed on the calibration ring 5 and fixes the sample box 6 by applying pressure to the inclined groove 63, so that the center of the sample box 6 is on the same axis as the center of the gun barrel 1.

[0034] Preferably, a rubber pad is provided between the target ring 5 and the target plate 4. By cooperating with the leveling bolt and the centering bolt, the center of the sample box 6 can be aligned with the barrel 1, providing an accurate experimental basis for subsequent impact experiments.

[0035] Preferably, there are three leveling screws 41 and three centering screws 53, three screw holes 51 that match the leveling screws 41 are provided on the front of the calibration ring 5, three locking through holes 52 that penetrate the calibration ring 5 are provided on the side of the calibration ring 5, and the centering screws 53 spirally penetrate the locking through holes 52 and cooperate with the inclined grooves 63 to fix the sample box 6. Using a group of three centering screws 53 and leveling screws 41 can make the connection more stable and the adjustment more convenient, and a group of three bolts for adjustment also has better controllability.

[0036] Specifically, the indicating mechanism further includes a collimator ring 7, an impact hole 62 for impacting the sample is provided in the middle of the sample box 6, the collimator ring 7 and the impact hole 62 match each other, the laser 8 is loaded at the center of the collimator ring 7 and the light beam emitted by the laser 8 can penetrate the collimator ring 7 and project onto the calibration target cartridge case 2. The collimator ring 7 is used to receive the reflected laser beam while installing the laser 8, and the relative position of the laser beam and the collimator ring 7 will not change when adjusting, so as to better calibrate.

[0037] Specifically, a center hole 71 and a light-transmitting hole 72 are provided at the center of the collimating ring 7. The center hole 71 communicates with the light-transmitting hole 72 and cooperates to penetrate the collimating ring 7. The laser 8 is installed in the center hole 71 and the light-emitting port matches the light-transmitting hole 72. The center hole 71 can fix the laser 8, and the light-transmitting hole 72 enables the laser 8 to project a light beam onto the target cartridge case 2, which makes calibration more convenient.

[0038] Preferably, a placement slot 61 for placing a sample is provided on the rear side of the sample box 6, the impact hole 62 is connected to the placement slot 61, and a mounting buckle 73 matching the placement slot 61 is provided on the periphery of the collimator ring 7, and the collimator ring 7 is fixed to the sample box 6 via the mounting buckle 73. The mounting buckle 73 matches the placement window slot, which can facilitate the installation of the collimator ring 7, and make the installation and removal of the collimator ring 7 more convenient.

[0039] Specifically, the center of the plane of the target calibration butt 2 facing the target plate 4 is provided with a reflective plane mirror 3, the reflective plane mirror 3 matches the laser 8, and a bolt hole 21 for operation is provided on the side of the target calibration butt 2 opposite to the side provided with the reflective plane mirror 3. The bolt hole 21 is used to connect a screw rod, so that the target calibration butt 2 is operated by the screw rod, and a mounting groove 22 for mounting the reflective plane mirror 3 is provided on the target calibration butt 2, so as to facilitate the installation of the reflective plane mirror 3.

[0040] The present invention also provides a target calibration method for the above visible light target calibration device, comprising the following steps:

[0041] Install the target cartridge holder 2, connect the bolt holes 21 of the target cartridge holder 2 through screws, and put the target cartridge holder 2 into the barrel 1 of the light gas gun, so that the reflective plane mirror 3 on the target cartridge holder 2 faces the target plate 4;

[0042] Install the calibration mechanism, place the calibration ring 5 at the corresponding position of the target plate 4, insert the rubber ring 42 at the connection and tighten it with the leveling screw 41, place the sample box 6 in the calibration ring 5, and insert the centering screw 53 to fix the sample box 6;

[0043] Install the collimation ring 7 and place the collimation ring 7 into the sample box 6;

[0044] Install the laser 8, insert the laser 8 into the central hole 71 of the collimating ring 7, and make the light-emitting port of the laser 8 face the barrel 1 through the light-transmitting hole 72;

[0045] Calibration: Power the laser 8 so that the laser 8 emits a laser beam, which is projected onto the reflecting plane mirror 3 and then projected onto the collimating ring 7 after being reflected by the reflecting plane mirror 3. The centering screw 53 and the leveling screw 41 are adjusted accordingly so that the projected laser beam coincides with the reflected laser beam, thus completing the calibration;

[0046] Remove the indicating mechanism, disconnect the power supply of the laser 8, remove the laser 8 and remove the collimation ring 7, and finally remove the target calibration cartridge 2 from the gun barrel 1 through the screw.

[0047] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the scope of protection of the present invention.

Claims

1. A visible light target calibration device for a light gas gun loading experiment, comprising a light gas gun barrel (1) and a target plate (4) matching the barrel (1), wherein a sample box (6) is provided on the target plate (4), characterized in that: The target plate (4) is also provided with a calibration mechanism and an indication mechanism, the calibration mechanism connecting the target plate (4) and the sample box (6), the indication mechanism comprising a laser (8) and a calibration cartridge (2), the laser (8) being placed at the center of the sample box (6), the calibration cartridge (2) being loaded in the gun barrel (1), the laser (8) matching the calibration cartridge (2), the indication mechanism further comprising a collimator ring (7), an impact hole (62) for impacting the sample being opened in the middle of the sample box (6), the collimator ring (7) matching the impact hole (62), the laser (8) being loaded at the center of the collimator ring (7) and the light emitted by the laser (8) The beam can penetrate the collimating ring (7) and be projected onto the calibration target cartridge (2); a reflecting plane mirror (3) is provided at the center of the plane of the calibration target cartridge (2) facing the target plate (4); the reflecting plane mirror (3) and the laser (8) are matched with each other; a bolt hole (21) for control is provided on a side of the calibration target cartridge (2) opposite to the side where the reflecting plane mirror (3) is provided; the adjustment mechanism comprises a calibration target ring (5); the calibration target ring (5) is fixed to the target plate (4) by a leveling screw (41); the sample box (6) is fixed to the calibration target ring (5) by a centering screw (53); the leveling screw (41) is arranged horizontally, and the centering screw (53) is arranged vertically.

2. The visible light target calibration device for light gas gun loading experiment according to claim 1, characterized in that: An inclined groove (63) matching the centering screw (53) is provided at the outer edge of the sample box (6).

3. The visible light target calibration device for light gas gun loading experiment according to claim 2, characterized in that: A rubber pad is provided between the target calibration ring (5) and the target plate (4).

4. The visible light target calibration device for light gas gun loading experiment according to claim 3 is characterized in that: There are three leveling screws (41) and three centering screws (53). The front surface of the calibration ring (5) is provided with three screw holes (51) that match the leveling screws (41). The side surface of the calibration ring (5) is provided with three locking through holes (52) that pass through the calibration ring (5). The centering screws (53) are spirally passed through the locking through holes (52) and cooperate with the inclined grooves (63) to fix the sample box (6).

5. The visible light target calibration device for light gas gun loading experiment according to any one of claims 1 to 4, characterized in that: A central hole (71) and a light-transmitting hole (72) are provided at the center of the collimating ring (7); the central hole (71) and the light-transmitting hole (72) are in communication with each other and cooperate to penetrate the collimating ring (7); the laser (8) is installed in the central hole (71) and the light-emitting port and the light-transmitting hole (72) match each other.

6. The visible light target calibration device for light gas gun loading experiment according to claim 5, characterized in that: The rear side of the sample box (6) is provided with a placement groove (61) for placing the sample, the impact hole (62) is connected to the placement groove (61), the periphery of the alignment ring (7) is processed with a mounting buckle (73) that matches the placement groove (61), and the alignment ring (7) is fixed to the sample box (6) via the mounting buckle (73).

7. A method for calibrating a target using the visible light calibrating device according to any one of claims 1 to 6, characterized in that: The steps include: Installing a target cartridge holder (2), connecting the bolt holes (21) of the target cartridge holder (2) via a screw, and placing the target cartridge holder (2) into the barrel (1) of the light gas gun, so that the reflective plane mirror (3) on the target cartridge holder (2) faces the target plate (4); Install the calibration mechanism, place the calibration ring (5) at the corresponding position of the target plate (4), insert the rubber ring (42) at the connection and tighten it with the leveling screw (41), place the sample box (6) in the calibration ring (5), and insert the centering screw (53) to fix the sample box (6); Install the collimation ring (7), and place the collimation ring (7) into the sample box (6); Installing the laser (8), inserting the laser (8) into the central hole (71) of the collimating ring (7), so that the light-emitting port of the laser (8) is directed toward the gun barrel (1) through the light-transmitting hole (72); Calibration, powering the laser (8) so that the laser (8) emits a laser beam, which is projected onto the reflecting plane mirror (3), and is projected onto the collimating ring (7) after being reflected by the reflecting plane mirror (3), and the centering screw (53) and the leveling screw (41) are adjusted so that the projected laser beam coincides with the reflected laser beam, thereby completing the calibration; The indicating mechanism is removed, the power supply of the laser (8) is disconnected, the laser (8) is removed and the collimation ring (7) is removed, and finally the target calibration cartridge (2) is removed from the gun barrel (1) by means of a screw.

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