Metal electric explosion speed measuring device

Abstract

The invention discloses a metal electric explosion speed measuring device, which comprises a seat body, a working assembly, a pulse power supply and a camera assembly, the base body is provided with an explosion cavity, a connecting channel and a speed measuring cavity which are communicated in sequence, and an explosion station is arranged in the explosion cavity; the working assembly comprises a moving part and a shading part, the moving part and the shading part are arranged in the explosion cavity and stacked with the explosion station in the direction away from the connecting channel, the size of the moving part is smaller than that of the connecting channel, the shading part is insulated from the metal part, and the size of the shading part is larger than that of the connecting channel. According to the scheme, the shading piece is blocked on the side, close to the explosion cavity, of the connecting channel, plasma glow generated when the metal foil is vaporized is shielded, and hard light is prevented from being transmitted into the speed measuring cavity. And the moving part can enter the speed measuring cavity through the connecting channel and continuously fly in the direction far away from the connecting channel. At the moment, the camera shooting assembly can obtain the moving track and the flying speed of the moving part in the speed measurement cavity, and speed measurement is completed.

Description

Technical Field

[0001] The invention relates to the technical field of metal electric explosion velocity measurement, in particular to a metal electric explosion velocity measurement device. Background Art

[0002] As a newly proposed high-speed forming technology, metal foil electric explosion is becoming increasingly important due to its low cost, strong drive, and improved material properties. The principle is to use high-frequency current pulses to induce the rapid vaporization and explosion of metal foil, thereby generating an impact force that drives the metal material into shape.

[0003] Publication number CN114713702B discloses a device and method for corrective processing of metal processing workpieces based on electric explosion. The arrangement of its aluminum wire array or aluminum foil array is flexible. The aluminum wires and aluminum foils can be multiple wires connected in series or in parallel, or can be set independently in various forms. Different pulse power supply systems can be connected. The pulse power supply system can choose to discharge at different times. The temporal and spatial distribution of the explosion shock wave energy can be controlled through timing coordination, and the different deformation requirements of different positions of the metal processing workpiece can be flexibly responded to.

[0004] To improve the application of metal electric explosion in high-speed forming, experiments are needed to measure physical parameters such as the speed change of the workpiece during the explosion. Currently, high-speed cameras are commonly used to measure the speed of the workpiece during the explosion. However, the intense photothermal effect associated with the vaporization of the metal can significantly affect the speed measurement accuracy during the experiment, and may even cause the camera to overexpose and lead to test failure. Summary of the Invention

[0005] The purpose of the present invention is to overcome the above-mentioned technical deficiencies and propose a metal electric explosion speed measuring device to solve the technical problem that high-speed cameras are usually used to measure the speed of workpieces during the electric explosion process in the existing technology. However, since the gasification process of metal parts is accompanied by violent photothermal effects, this will greatly affect the speed measurement accuracy during the experiment and even cause the camera to be overexposed, resulting in test failure.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: The present invention provides a metal electric explosion velocity measuring device, comprising: The base body has an explosion chamber, a connecting channel and a speed measuring chamber which are connected in sequence. An explosion station is provided in the explosion chamber and is used to place metal parts. a working assembly comprising a moving part and a light shielding member, wherein the moving part and the light shielding member are disposed in the explosion chamber and are stacked with the explosion station in a direction away from the connecting passage, wherein the moving part is smaller than the connecting passage, and the light shielding member is insulated from the metal member and is larger than the connecting passage; a pulse power supply, for electrically connecting to the metal member; and The camera assembly is used to obtain the motion picture of the moving part in the speed measuring cavity.

[0007] In some embodiments, the side wall of the velocity measurement cavity is provided with an observation port communicating with the outside; The camera assembly is located outside the speed measuring cavity and can obtain images inside the speed measuring cavity through the observation port.

[0008] In some embodiments, the observation port is extended in a direction away from the connecting channel; and / or, The size of the observation port is larger than that of the moving part. The metal electric explosion speed measuring device further includes a transparent baffle, which is arranged at the observation port.

[0009] In some embodiments, the inner diameter of the velocity measuring cavity is gradually expanded in a direction away from the connecting channel.

[0010] In some embodiments, the base includes a base and an observation tube, and the base and the observation tube are detachably connected; The explosion chamber is formed on the base and is open on one side close to the observation tube. The connecting channel and the speed measuring chamber are arranged in the observation tube and are sequentially arranged in a direction away from the base.

[0011] In some embodiments, the base includes a bottom plate, an annular insulating pad, and two electrodes. The annular insulating pad is mounted on one side of the bottom plate and forms the explosion chamber with the bottom plate. Two mounting gaps are formed between the annular insulating pad and the bottom plate. The two mounting gaps communicate with the explosion chamber. The two electrodes are respectively mounted in the two mounting gaps and can extend from the mounting gaps into the explosion station to connect to the metal parts. The observation tube is installed on a side of the annular insulating pad away from the bottom plate, and the pulse power supply is electrically connected to the two electrodes respectively.

[0012] In some embodiments, the observation tube includes a tube body and a fixing seat, wherein the tube body, the fixing seat and the base are arranged in sequence and are detachably connected in sequence; The speed measuring cavity is formed in the cylinder, and the connecting channel is formed in the fixing seat.

[0013] In some embodiments, the speed measuring cavity is open on a side away from the fixing seat; The observation tube further comprises a top cover which is detachably mounted on the tube body and covers an end of the speed measuring cavity away from the fixing seat.

[0014] In some embodiments, the moving part is configured as a sphere.

[0015] In some embodiments, a limiting flange is provided on a side of the shading member close to the moving member, and the limiting flange is arranged around the circumference of the moving member.

[0016] Compared to existing technologies, the metal electric explosion velocity measurement device provided by the present invention places a metal part (for example, a metal foil) at the explosion station within the explosion chamber before measuring velocity. The moving part, light shielding element, and metal foil are then stacked in a direction away from the connecting channel. A pulsed power supply is then connected to the metal foil, which discharges electricity into it. The high pulsed current flowing through the foil causes it to rapidly heat up and vaporize, causing it to explode. The resulting driving force propels the light shielding element and moving part toward the connecting channel at high speed.

[0017] Because the connecting channel is larger than the moving part and smaller than the light shield, the light shield is blocked on the side of the connecting channel closest to the explosion chamber and partially embedded in the connecting channel, thereby blocking the plasma glow generated by the vaporized metal foil and preventing the strong light from reaching the speed measurement chamber. However, the moving part is able to pass through the connecting channel and enter the speed measurement chamber, continuing to fly away from the connecting channel. At this time, the camera assembly can capture the moving part's trajectory and flight speed in the speed measurement chamber, completing the speed measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 1 is a schematic diagram of the metal electric explosion velocity measuring device provided by the first embodiment of the present invention in operation; Figure 2 yes Figure 1 Schematic diagram of the metal parts, base and working components; Figure 3 yes Figure 1 Schematic diagram of the central observation tube; Figure 4 yes Figure 2 A partial schematic diagram of the metal parts, base and working components; Figure 5 yes Figure 1 Schematic diagram of the metal parts; Figure 6 2 is a schematic diagram of a metal electric explosion velocity measuring device provided by a second embodiment of the present invention; Figure 7 yes Figure 6 Cross-sectional view of the middle observation tube; Figure 8 yes Figure 6 Schematic diagram of the middle cylinder; Figure 9 is a schematic diagram of a current waveform of a metal member in one embodiment; Figure 10 FIG. 4 is a schematic diagram of a voltage waveform across a metal member in an embodiment.

[0019] Description of reference numerals: 1. Base; 1a. Explosion chamber; 1b. Connecting channel; 1c. Velocity measurement chamber; 1d. Observation port; 11. Explosion station; 12. Base; 121. Bottom plate; 122. Annular insulating pad; 123. Electrode; 13. Observation tube; 131. Cylinder body; 132. Fixed seat; 133. Top cover; 2. Working assembly; 21. Moving part; 211. Steel ball; 22. Shading part; 221. Shading flying plate; 3. Pulse power supply; 4. Transparent baffle; 5. Insulating tape; 6. Metal parts; 61. Explosion zone. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0021] In order to solve the technical problem that the existing technology usually uses high-speed cameras to measure the speed of workpieces during electric explosions, however, since the gasification process of metal parts is accompanied by a violent photothermal effect, this will greatly affect the speed measurement accuracy during the experiment, and even cause the camera to be overexposed and lead to test failure, the present invention provides a metal electric explosion speed measurement device. When the metal foil is electrically exploded, the light shielding member is blocked on the side of the connecting channel close to the explosion chamber and is partially embedded in the connecting channel, thereby shielding the plasma glow generated when the metal foil is vaporized and preventing strong light from being transmitted to the speed measurement chamber. The moving part can pass through the connecting channel and enter the speed measurement chamber, and continue to fly in the direction away from the connecting channel. At this time, the camera component can obtain the running trajectory and flight speed of the moving part in the speed measurement chamber to complete the speed measurement.

[0022] See also Figures 1 to 4 , Figures 1 to 4 This is a schematic structural diagram of a metal electric explosion speed measuring device in one embodiment of the present invention, which includes a base 1, a working assembly 2, a pulse power supply 3, and a camera assembly (not shown); the base 1 has an explosion chamber 1a, a connecting channel 1b, and a speed measuring chamber 1c that are connected in sequence, and an explosion station 11 is provided in the explosion chamber 1a, and the explosion station 11 is used to place a metal part 6; the working assembly 2 includes a moving part 21 and a light shielding member 22, and the moving part 21 and the light shielding member 22 are provided in the explosion chamber 1a and are stacked with the explosion station 11 in a direction away from the connecting channel 1b. The size of the moving part 21 is smaller than that of the connecting channel 1b, and the light shielding member 22 is insulated from the metal part 6 and its size is larger than that of the connecting channel 1b; the pulse power supply 3 is used to be electrically connected to the metal part 6; and the camera assembly is used to capture the movement image of the moving part 21 in the speed measuring chamber 1c.

[0023] Before measuring speed, the metal electric explosion velocity measuring device provided by the present invention places a metal member 6 (using a metal foil as an example) at the explosion station 11 of the explosion chamber 1a. A moving member 21, a light shielding member 22, and the metal foil are then stacked in a direction away from the connecting channel 1b. The metal foil is then connected to a pulse power supply 3, which discharges electricity into the foil. The high pulse current flowing through the foil causes it to rapidly heat up, vaporizing and exploding. The resulting driving force propels the light shielding member 22 and moving member 21 toward the connecting channel 1b at high speed.

[0024] Because the dimensions of connecting channel 1b are larger than those of moving part 21 and smaller than those of light shielding member 22, light shielding member 22 is blocked on the side of connecting channel 1b closest to explosion chamber 1a and partially embedded within connecting channel 1b, thereby shielding the plasma glow generated by the vaporized metal foil and preventing the strong light from reaching velocity measurement chamber 1c. However, moving part 21 is able to pass through connecting channel 1b and enter velocity measurement chamber 1c, continuing its flight away from connecting channel 1b. At this point, the camera assembly can capture the trajectory and speed of moving part 21 within velocity measurement chamber 1c, completing the velocity measurement.

[0025] It should be understood that the metal member 6 can be a metal wire, a metal foil or a metal coating. Figure 5 In this embodiment, the metal member 6 is configured as aluminum foil. To ensure that the area of the metal foil that causes an electric explosion directly facing the connecting channel 1b is located, thereby allowing the moving member 21 to be inserted into the connecting channel 1b, the aluminum foil is configured to be 200 mm long, 40 mm wide on both sides, and 15 mm wide in the center area directly facing the connecting channel 1b. A circular arc with a radius of 30 mm transitions between the two side areas and the center area, ensuring that the center area forms an explosion zone 61, allowing for an electric explosion.

[0026] It should be noted that, in one embodiment, the entire camera assembly can be located within the speed measurement chamber 1c to observe the movement of the moving member 21. In another embodiment, the observation head of the camera assembly can be located within the speed measurement chamber 1c, while the main body can be located outside the speed measurement chamber 1c, and information can be transmitted wirelessly. The side walls of the speed measurement chamber can also be made of a transparent material, or other materials can be used.

[0027] In one embodiment, see Figures 6 to 8 The side wall of the speed measuring cavity 1c is provided with an observation port 1d communicating with the outside; the camera assembly is located outside the speed measuring cavity 1c and can obtain the image inside the speed measuring cavity 1c through the observation port 1d.

[0028] In this embodiment, the camera assembly is arranged outside the speed measuring cavity 1c, and the movement of the moving part 21 in the speed measuring cavity 1c is obtained in real time through the observation port 1d, which can effectively prevent the moving part 21 from accidentally damaging the camera assembly and extend the service life of the camera assembly.

[0029] It should be noted that, in one embodiment, the camera assembly can capture the movement of the moving part 21 in real time, or can capture images continuously. Furthermore, it should be understood that the principle of inferring the speed of the moving part 21 based on its trajectory and time record captured by the camera assembly is conventional technology and will not be elaborated upon here. Specifically, in this embodiment, the camera assembly is a high-speed camera.

[0030] Furthermore, in one embodiment, the size of the observation port 1d is smaller than that of the moving part 21 to prevent the moving part 21 from accidentally detaching from the observation port 1d and potentially injuring someone. In another embodiment, the size of the observation port 1d is larger than that of the moving part 21, and a transparent baffle 4 is installed over the observation port 1d to allow the camera assembly to fully capture the motion trajectory of the moving part 21. In this embodiment, the transparent baffle 4 is made of tempered glass and can be bolted to the base 1 for easy removal and replacement.

[0031] In one embodiment, the observation port 1d is extended in a direction away from the connecting channel 1b.

[0032] In this embodiment, the observation port 1d is extended to extend the observation range of the moving part 21 and improve the measurement accuracy. Specifically, in this embodiment, the observation port 1d extends from the end of the speed measuring cavity 1c close to the connecting channel 1b to the end away from the connecting channel 1b.

[0033] In one embodiment, the inner diameter of the velocity measuring cavity 1c is gradually expanded in a direction away from the connecting channel 1b.

[0034] In this embodiment, the speed measuring cavity 1c is gradually expanded in the direction away from the connecting channel 1b, which improves the compactness of the device and reduces the probability of the moving part 21 colliding with the inner wall of the speed measuring cavity 1c.

[0035] It should be noted that the specific form of the seat body 1 is not limited. It can be provided as a box body with the above three chambers and a corresponding openable and closable door body; it can also be provided as three cylinders 131 bolted in sequence; or other forms.

[0036] In one embodiment, see Figure 1 The base body 1 includes a base 12 and an observation tube 13, and the base 12 and the observation tube 13 are detachably connected; the explosion chamber 1a is formed on the base 12, and its side close to the observation tube 13 is open, and the connecting channel 1b and the speed measuring chamber 1c are provided in the observation tube 13, and are arranged in sequence along the direction away from the base 12.

[0037] In this embodiment, the base 12 and observation tube 13 are detachably connected to facilitate installation of the metal foil within the explosion chamber 1a, improving the ease of installation. It should be noted that the base 12 and observation tube 13 can be detachably connected using a snap or buckle, or alternatively, bolts. Specifically, in this embodiment, the base 12 and observation tube 13 are detachably connected using bolts. Furthermore, the blasting station 11 is located on the inner wall of the explosion chamber 1a, away from the connecting passage 1b. It should be understood that the base 12 is made of an opaque material.

[0038] In one embodiment, the base 12 includes a bottom plate 121, an annular insulating pad 122 and two electrodes 123. The annular insulating pad 122 is installed on one side of the bottom plate 121 and is surrounded by the bottom plate 121 to form an explosion chamber 1a. Two installation gaps are formed between the annular insulating pad 122 and the bottom plate 121. The two installation gaps are connected to the explosion chamber 1a. The two electrodes 123 are respectively installed in the two installation gaps and can extend from the installation gaps into the explosion station 11 for connecting the metal parts 6; the observation tube 13 is installed on the side of the annular insulating pad 122 away from the bottom plate 121, and the pulse power supply 3 is electrically connected to the two electrodes 123 respectively.

[0039] In this embodiment, an annular insulating gasket 122 is provided between the base plate 121 and the observation tube 13 to enhance the insulation capability of the observation tube 13. It should be understood that the annular insulating gasket 122 can be provided as a single piece or in multiple sections, without limitation. Furthermore, in this embodiment, insulating tape 5 is provided between the metal foil and the base plate 121, and the light shielding member 22 is also insulated from the metal foil via the insulating tape 5.

[0040] It should be noted that, in one embodiment, the capacitance value of the pulse capacitor group in the pulse power supply 3 is less than 100 microfarads. It includes a power supply body, a wire and a switch, and the wire connects the power supply body, the switch and the two electrodes 123 in sequence.

[0041] In one embodiment, the observation tube 13 includes a tube body 131 and a fixing seat 132 . The tube body 131 , the fixing seat 132 and the base 12 are arranged in sequence and are detachably connected in sequence. The speed measuring cavity 1c is formed in the tube body 131 , and the connecting channel 1b is formed in the fixing seat 132 .

[0042] In this embodiment, the observation tube 13 is also configured with a removable fixing base 132 and a barrel 131. This facilitates replacement if the end of the connecting channel 1b near the explosion chamber 1a is severely damaged, improving convenience and reducing costs. This also facilitates the removal of the moving part 21 from the velocity measurement chamber 1c. It should be noted that the removable connection between the barrel 131 and the fixing base 132 can be achieved through a snap-fit, buckle, or bolt connection. Specifically, in this embodiment, the removable connection between the barrel 131 and the fixing base 132 is achieved through bolts.

[0043] In one embodiment, the side of the speed measuring cavity 1c away from the fixing seat 132 is open; the observation tube 13 further includes a top cover 133, which is detachably mounted on the cylinder body 131 and covers the end of the speed measuring cavity 1c away from the fixing seat 132.

[0044] In this embodiment, a removable top cover 133 is provided at the end of the barrel 131 away from the fixing seat 132. This facilitates independent replacement of the movable member 21 in the velocity measuring chamber 1c if damaged and facilitates flexible removal of the movable member 21 from the velocity measuring chamber 1c. Similarly, the removable connection between the top cover 133 and the barrel 131 can be achieved by a snap-fit, buckle, or bolt connection. Specifically, in this embodiment, the barrel 131 and the top cover 133 are removably connected by bolts.

[0045] It should be noted that the moving member 21 can be provided with a moving seat, a moving rod or other forms. In addition, the light shielding member 22 can be provided with a light shielding seat, a light shield or other light-tight carrier forms.

[0046] In one embodiment, the moving member 21 is configured as a sphere. The light shielding seat is configured as a light shielding flying plate 221 .

[0047] In this embodiment, the moving element 21 is configured as a steel ball 211, making it less susceptible to interference from the inner walls of the chamber during high-speed movement, thereby improving measurement accuracy. The light-shielding plate 221 effectively shields the connecting channel 1b, preventing strong light from entering the velocity measurement chamber 1c. It also effectively supports the steel ball 211, driving its synchronous high-speed movement. Specifically, the light-shielding plate 221 is a metal plate insulated from the metal foil by insulating tape 5.

[0048] In one embodiment, a limiting flange is provided on a side of the shading member 22 close to the moving member 21 , and the limiting flange is arranged around the circumference of the moving member 21 .

[0049] In this embodiment, during measurement preparation, the steel ball 211 is placed in a retaining flange to prevent the steel ball 211 from accidentally rolling and deflecting from the connecting channel 1b, ensuring stable testing. Furthermore, in one embodiment, a plug-in arm is provided on the side of the fixing seat 132 near the explosion chamber 1a, facing the light shielding plate 221. This allows the light shielding plate 221 to be inserted into the plug-in arm when it strikes the fixing seat 132, further restricting its movement away from the connecting channel 1b and ensuring that the light shielding plate 221 stably blocks the connecting channel 1b.

[0050] In order to better understand the present invention, the following Figures 1 to 10 The technical solution of the present invention is described in detail: The main steps of this solution during speed testing are as follows: Step 1: Turn off the switch of the pulse power supply 3 and connect the wire to the electrode 123; Step 2: Apply a layer of insulating tape 5 to the upper surface of the bottom plate 121; Step 3: Place the aluminum foil processed according to a fixed size on top of the insulating tape 5 of the bottom plate 121. The specific shape of the aluminum foil is as follows: Figure 5 As shown; Step 4: Apply a layer of insulating tape 5 to the lower surface of the metal light shielding plate 221 and place it on top of the aluminum foil; Step 5: Place an annular insulating pad 122 on top of the electrode 123; Step 6: Fasten the cylinder 131 and the fixing seat 132 with bolts, and then place the entire cylinder 131 on the annular insulating pad 122; Step 7: Place the steel ball 211 through the upper opening of the velocity measuring cavity 1c of the cylinder 131 onto the upper surface of the metal light shielding plate 221. At this time, the steel ball 211 is located in the middle of the limiting flange of the light shielding plate 221. Step 8: Fix the tempered glass to the observation port 1d with bolts, and fix the top cover 133 to the upper open end of the speed measurement cavity 1c with bolts; In step nine, the pulse power supply 3 is switched on and discharged into the aluminum foil. A high pulse current flows through the foil, causing it to rapidly heat up and vaporize and explode. The resulting driving force propels the metal light-shielding plate 221, driving the steel ball 211 at high speed. During its upward flight, the light-shielding plate 221 collides with the mounting bracket 132 of the observation tube 13, blocking the plasma glow generated by the vaporization of the aluminum foil. Meanwhile, the steel ball 211 continues its upward flight, and its trajectory and speed can be detected through the tempered glass, completing the velocity measurement.

[0051] When a large pulse current is passed through the aluminum foil, the aluminum foil will first Figure 5 The explosion zone 61 shown explodes. In this way, the driving force generated by the explosion can be precisely controlled to act on the metal light shielding flying plate 221 and the steel ball 211 to produce vertical displacement. At this time, the current curve in the aluminum foil is shown in the schematic diagram. Figure 9 As shown, the voltage curve diagram is as follows Figure 10 shown.

[0052] The specific embodiments of the present invention described above do not limit the scope of protection of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A metal electric explosion velocity measuring device, characterized in that: include: The base body has an explosion chamber, a connecting channel and a speed measuring chamber which are connected in sequence. An explosion station is provided in the explosion chamber and is used to place metal parts. A working assembly, comprising a light shielding member and a moving member, wherein the light shielding member is placed in the explosion chamber, the moving member, the light shielding member, and the explosion station are stacked in a direction away from the connecting channel, the moving member is smaller than the connecting channel, and the light shielding member is insulated from the metal member and larger than the connecting channel; a pulse power supply, for electrically connecting to the metal member; and The camera assembly is used to obtain the motion picture of the moving part in the speed measuring cavity.

2. The metal electric explosion velocity measuring device according to claim 1, characterized in that: The base comprises a base and an observation tube, wherein the base and the observation tube are detachably connected; The explosion chamber is formed on the base and is open on one side close to the observation tube. The connecting channel and the speed measuring chamber are arranged in the observation tube and are sequentially arranged in a direction away from the base.

3. The metal electric explosion velocity measuring device according to claim 2, characterized in that: The base includes a bottom plate, an annular insulating pad and two electrodes. The annular insulating pad is installed on one side of the bottom plate and forms the explosion chamber with the bottom plate. Two installation gaps are formed between the annular insulating pad and the bottom plate. The two installation gaps are connected to the explosion chamber. The two electrodes are respectively installed in the two installation gaps and can extend from the installation gaps into the explosion station to connect with the metal parts. The observation tube is installed on a side of the annular insulating pad away from the bottom plate, and the pulse power supply is electrically connected to the two electrodes respectively.

4. The metal electric explosion velocity measuring device according to claim 2, characterized in that: The observation tube includes a tube body and a fixing seat, wherein the tube body, the fixing seat and the base are arranged in sequence and are detachably connected in sequence; The speed measuring cavity is formed in the cylinder, and the connecting channel is formed in the fixing seat.

5. The metal electric explosion velocity measuring device according to claim 4, characterized in that: The speed measuring cavity is open on one side away from the fixing seat; The observation tube further comprises a top cover which is detachably mounted on the tube body and covers an end of the speed measuring cavity away from the fixing seat.

6. The metal electric explosion velocity measuring device according to claim 1, characterized in that: The side wall of the speed measuring cavity is provided with an observation port communicating with the outside; The camera assembly is located outside the speed measuring cavity and can obtain images inside the speed measuring cavity through the observation port.

7. The metal electric explosion velocity measuring device according to claim 6, characterized in that: The observation port is extended in a direction away from the connecting channel; and / or, The size of the observation port is larger than that of the moving part. The metal electric explosion speed measuring device further includes a transparent baffle, which is arranged at the observation port.

8. The metal electric explosion velocity measuring device according to claim 1, characterized in that: The inner diameter of the speed measuring cavity is gradually expanded in a direction away from the connecting channel.

9. The metal electric explosion velocity measuring device according to claim 1, characterized in that: The moving part is arranged in a spherical shape.

10. The metal electric explosion velocity measuring device according to claim 9, characterized in that: A limiting flange is provided on one side of the light shielding member close to the moving member, and the limiting flange is arranged around the circumference of the moving member.

Images