CN111579954B - Device and method for evaluating electrostatic spark energy under variable initial pressure of inert atmosphere - Google Patents
Device and method for evaluating electrostatic spark energy under variable initial pressure of inert atmosphere Download PDFInfo
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- CN111579954B CN111579954B CN202010562063.1A CN202010562063A CN111579954B CN 111579954 B CN111579954 B CN 111579954B CN 202010562063 A CN202010562063 A CN 202010562063A CN 111579954 B CN111579954 B CN 111579954B
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- G—PHYSICS
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/16—Construction of testing vessels; Electrodes therefor
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- G—PHYSICS
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
- G01R21/06—Arrangements for measuring electric power or power factor by measuring current and voltage
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
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Abstract
An evaluation device and an evaluation method for electrostatic spark energy under variable initial pressure of inert atmosphere belong to the field of explosion safety science. The device for evaluating the electrostatic spark energy under the variable initial pressure of the inert atmosphere comprises an electric spark generating device, a data acquisition device and a gas distribution device. The device can realize that the electric spark energy is 32mJ-3J, the electrode gap is 0-10mm and the electrode angle is 180-90oAnd at the same time, the replacement of electrodes of different materials and tip shapes can be realized. The initial pressure of the electric spark generating chamber is adjustable within 0-5bar and the establishment of a plurality of inert gas atmospheres of the electric spark generating chamber is realized through the gas distribution device. The evaluation method of the device for evaluating the electrostatic spark energy under the variable initial pressure of the inert atmosphere realizes the evaluation of the electrostatic spark energy under different parameters within the energy range of 32 mJ-3J.
Description
Technical Field
An evaluation device and an evaluation method for electrostatic spark energy under variable initial pressure of inert atmosphere belong to the field of explosion safety science.
Background
In the production and processing process, fire and explosion accidents caused by electrostatic sparks frequently occur, and the harm is huge. The electrostatic spark discharge process is a dynamic energy release process and is influenced by various factors, which are mainly classified into two major categories, circuit parameters and non-circuit parameters. The circuit parameters mainly include: energy (capacitance and voltage), load inductance, load resistance, etc., and non-circuit parameters mainly include: environmental variables (gas pressure, gas composition, temperature, humidity, air flow rate, etc.), electrode parameters (gap, diameter, shape, material, etc.). Therefore, the evaluation of the electrostatic spark energy of different energies, electrode parameters and gas environments has important guiding significance for establishing a safe production environment and effectively avoiding explosion.
Most of the existing electrostatic spark energy measuring devices are ignition energy measuring devices (CN 101692081A, CN 105891254A) of combustible substances at normal temperature and normal pressure, and the devices have less variable parameters except energy or can not realize the adjustment of a plurality of parameters on the same device (CN 104897305A). None of them has been investigated simultaneously with both spark energy and shock wave characteristics. Therefore, the realization of the electrostatic spark energy evaluation device and the evaluation method under the variable initial pressure of the inert atmosphere has great significance.
Disclosure of Invention
The invention solves the problems in the prior art and provides an evaluation device and an evaluation method for electrostatic spark energy under variable initial pressure of inert atmosphere, wherein the device can provide an initial pressure regulation range of 0-5bar, an electrode gap of 0-10mm, and an electrode angle of 180 DEGo~90oThe electrode material and tip are replaceable.
The technical scheme of the invention is as follows: an electrostatic spark energy evaluation device under variable initial pressure of inert atmosphere comprises an electric spark generating device, a data acquisition device and a gas distribution device, wherein the electric spark generating device comprises an electric spark generating chamber, a micrometer and an electric spark generator electrically connected with a time schedule controller, the electric spark generating chamber comprises an outer wall, a window and a sealing sleeve, a pressure gauge is arranged on the outer wall, the window is fixed at the end part of the outer wall through a flange and a flange bolt, and the sealing sleeve is sleeved at the middle position of the outer wall; the outer wall of the first electrode is provided with an outer wall slot with an arc length of 90 degrees, one end of the first electrode fixed on the outer wall away from the outer wall slot is provided with an arc length of 90 degrees, and the other end of the first electrode is provided with an arc length of 180 degrees; a sleeve slot with 90-degree arc length is arranged on the sealing sleeve, one end of the second electrode fixed on the sealing sleeve, which is far away from the sleeve slot, is 90-degree arc length, and the other end is 180-degree arc length; between the outer wall and the sealing sleeve (1 g), two sides of the outer wall slot are respectively provided with an O-shaped sealing ring, and the periphery of the outer wall slot is provided with another O-shaped sealing ring positioned in a slot peripheral sealing groove; the outer end of the first electrode is electrically connected with the anode of the electric spark generator, the outer end of the second electrode is electrically connected with the cathode of the electric spark generator and is fixedly connected with the micrometer; the parts of the first electrode and the second electrode extending into the outer wall are adjusted to the mutually vertical position of the two electrodes at the same relative straight line position by rotating the sealing sleeve, and the adjusting angle is 180-90 degrees;
the data acquisition device comprises a high-speed camera and a data acquisition unit, wherein the head of the high-speed camera is aligned to a window at the end part of the outer wall, the high-speed camera is electrically connected with a computer, a time sequence controller and the data acquisition unit, the data acquisition unit is in contact connection with the anode of the first electrode through a voltage probe, and a current probe is sleeved on the second electrode;
the gas distribution device comprises a vacuum pump and a gas cylinder, the vacuum pump is connected with a tee joint through a vacuum control valve, one side of the tee joint is connected with the gas cylinder through a gas control valve, and the other side of the tee joint is communicated with an inner cavity of the electric spark generation chamber through a gas pipeline.
The first electrode, the second electrode and the sealing joint are in insulation sealing through rubber rings, an outer wall threaded hole is formed in the outer wall of the bottom of the sleeve groove, the first electrode is in threaded connection with the outer wall threaded hole through one sealing joint, a sleeve threaded hole is formed in the sealing sleeve of the bottom of the outer wall groove, the second electrode is in threaded connection with the sleeve threaded hole through the other sealing joint, and the end portion of the second electrode is fixedly connected with the measuring end of the micrometer through a tetrafluoroethylene part.
The evaluation method of the electrostatic spark energy evaluation device under the variable initial pressure of the inert atmosphere comprises the following steps:
a. rotating the sealing sleeve to drive the second electrode to rotate, and adjusting the angle between the second electrode and the first electrode (1 b) to be 180-90%oA value in between;
b. rotating the micrometer to adjust the gap between the second electrode and the first electrode, wherein the gap between the two electrodes is a value between 0 and 10 mm;
c. changing the voltage and the capacitance of an electric spark generator, and adjusting the electric spark energy generated between a first electrode and a second electrode to be a value between 32mJ and 3J;
d. opening a vacuum pump and a vacuum control valve, reducing the pressure in the electric spark generating chamber to a vacuum state, closing the vacuum pump and the vacuum control valve, and opening a gas control valve and a gas bottle to fill required gas;
e. turning on a switch of a time schedule controller, wherein the time schedule controller firstly triggers a high-speed camera and a data collector and then triggers an electric spark generator, and the electric spark generator controls a first electrode and a second electrode to discharge electric sparks;
f. recording voltage and current data under different experimental parameters through a data acquisition unit, and quantitatively evaluating the discharge power, the discharge energy and the discharge efficiency of the electric spark through electric spark energy integral calculation; meanwhile, an electric spark pressure ripple image under different parameters and different time is obtained by using a high-speed camera and combining with a schlieren technology, the pressure wave propagation process of the electric spark is analyzed and calculated, and the influence characteristics of different parameters on the electric spark pressure wave propagation speed and the energy field distribution are evaluated.
The invention has the following beneficial effects: the device comprises an electric spark generating device, a data acquisition device and a gas distribution device, wherein the electric spark generating device comprises an electric spark generating chamber, a micrometer, an electric spark generator and a time schedule controller. The initial pressure, inert gas components, electrode gap, electrode angle and voltage and capacitance of the electric spark generator are adjusted to change a plurality of parameters influencing electric spark discharge, so that the initial pressure is adjustable within the range of 0-5bar, the electrode gap is continuously and accurately controlled within the range of 0-10mm, and the electrode angle is 180-90oThe electrode is continuously and accurately adjustable, and the energy of electric sparks generated between the electrodes is adjustable within the range of 32 mJ-3J. The two electrodes are hermetically connected with the electric spark generation chamber through the sealing joint, and the sealing joint electrodes are sealed, fixed and insulated through the extrusion of the rubber ring, so that the flexible replacement of the electrodes with different materials and different electrode tips is realized, and the discharge energy evaluation under different electrode parameters is realized. The evaluation method of the device for evaluating the electrostatic spark energy under the variable initial pressure of the inert atmosphere can realize the evaluation of the spark discharge power and the spark discharge energy through the spark energy integral calculation. By combining the schlieren technology, the influence characteristics of different parameters on the propagation speed of the electric spark pressure wave and the distribution of the pressure wave energy field can be evaluated. Realizes the energy within the range of 32mJ-3JAnd evaluating the electrostatic spark energy under different parameters. The device can also judge whether to reach the breakdown state through voltage and current waveform data and schlieren pictures, and has the advantages of reasonable structure, small volume, simple and convenient operation, powerful function and the like.
Drawings
FIG. 1 is a block diagram of an electrostatic spark energy evaluation device under variable initial pressure in an inert atmosphere according to the present invention.
Fig. 2 is a front view of the electric spark generation chamber of fig. 1.
Figure 3 a left side view of the spark generation chamber of figure 1.
Fig. 4 is a plan view of the electric spark generating chamber of fig. 1.
Fig. 5 is a sectional view taken along line a-a in fig. 3.
FIG. 6 is a developed view of the mating portion of the outer wall and the sealing sleeve.
Fig. 7 is a developed view of the sealing sleeve.
In the figure: 1. the spark generating device comprises a spark generating chamber, 1a, a pressure gauge, 1b, a first electrode, 1b1, a first electrode mounting hole, 1c, a second electrode, 1c1, a second electrode mounting hole, 1d, a window, 1e, a flange, 1f, a flange bolt, 1g, a sealing sleeve, 1h, an outer wall, 1i, a sealing joint, 1j, a sleeve slot, 1k, an outer wall slot, 1m, an outer wall slot, 1n, an outer wall sealing groove, 1p, a slot peripheral sealing groove, 2, a micrometer, 3, a spark generator, 4, a timing controller, 5, a computer, 6, a high-speed camera, 7, a data collector, 7a, a voltage probe, 7b, a current probe, 8, a vacuum pump, 8a, a vacuum control valve, 9, a gas bottle, 9a, a gas control valve, 10, a gas pipeline, 10a and a tee joint.
Detailed Description
An apparatus and a method for evaluating electrostatic spark energy under a variable initial pressure in an inert atmosphere according to the present invention will be described in detail with reference to the accompanying drawings.
Fig. 1, 2, 3, 4, and 5 are block diagrams showing an electrostatic spark energy evaluation device under a variable initial pressure in an inert atmosphere. In the figure, the electrostatic spark energy evaluation device under the variable initial pressure of the inert atmosphere comprises an electric spark generating device, a data acquisition device and a gas distribution device, wherein the electric spark generating device comprises an electric spark generating chamber 1, a micrometer 2 and an electric spark generator 3 electrically connected with a time schedule controller 4, the electric spark generating chamber 1 comprises an outer wall 1h, a window 1d and a sealing sleeve 1g, a pressure gauge 1a is arranged on the outer wall 1h, the window 1d is fixed at the end part of the outer wall 1h through a flange 1e and a flange bolt 1f, and the sealing sleeve 1g is sleeved at the middle position of the outer wall 1 h. An outer wall slot 1k with an arc length of 90 degrees is arranged on the outer wall 1h, one end of a first electrode 1b fixed on the outer wall 1h, away from the outer wall slot 1k, is provided with an arc length of 90 degrees, and the other end is provided with an arc length of 180 degrees; between the outer wall 1h and the sealing sleeve 1g, two sides of the outer wall slot 1k are respectively provided with an O-shaped sealing ring 1m, and the periphery of the outer wall slot 1k is provided with another O-shaped sealing ring (as shown in fig. 6) positioned in the slot peripheral sealing groove 1 p. A 90-degree arc-length sleeve slot 1j is formed in the sealing sleeve 1g, and the second electrode 1c fixed on the sealing sleeve 1g has an arc length of 90 degrees at one end from the sleeve slot 1j and an arc length of 180 degrees at the other end (as shown in fig. 7). The outer end of the first electrode 1b is electrically connected with the anode of the electric spark generator 3, the outer end of the second electrode 1c is electrically connected with the cathode of the electric spark generator 3, and the micrometer 2 is fixedly connected with the outer end of the second electrode. The parts of the first electrode 1b and the second electrode 1c extending into the outer wall 1h are adjusted to the position where the two electrodes are perpendicular to each other at the same relative linear position of the second electrode 1c and the first electrode 1b by rotating the sealing sleeve 1g, and the adjustment angle is 180-90 degrees.
The data acquisition device comprises a high-speed camera 6 and a data acquisition unit 7, the head of the high-speed camera 6 is aligned with the window 1d at the end part of the outer wall 1h, the high-speed camera 6 is electrically connected with a computer 5, a time sequence controller 4 and the data acquisition unit 7, the data acquisition unit 7 is in contact connection with the anode of the first electrode 1b through a voltage probe 7a, and a current probe 7b is sleeved on the second electrode 1 c.
The gas distribution device comprises a vacuum pump 8 and a gas cylinder 9, the vacuum pump 8 is connected with a tee joint 10a through a vacuum control valve 8a, one side of the tee joint 10a is connected with the gas cylinder 9 through a gas control valve 9a, and the other side of the tee joint is communicated with the inner cavity of the electric spark generation chamber 1 through a gas pipeline 10.
The evaluation method of the electrostatic spark energy evaluation device under the variable initial pressure of the inert atmosphere comprises the following steps:
a. rotating the sealing sleeve 1g, the sealing sleeve 1g drives the second electrode 1c to rotate, and adjusting the angle between the second electrode 1c and the first electrode 1b, wherein the included angle between the two electrodes is 180-90 DEGoA value in between;
b. rotating the micrometer 2, and adjusting the gap between the second electrode 1c and the first electrode 1b, wherein the gap between the two electrodes is a value between 0 and 10 mm;
c. changing the voltage and the capacitance of the electric spark generator 3, and adjusting the electric spark energy generated between the first electrode 1b and the second electrode 1c to be a value between 32mJ and 3J;
d. opening a vacuum pump 8 and a vacuum control valve 8a, reducing the pressure in the electric spark generating chamber 1 to a vacuum state, closing the vacuum pump 8 and the vacuum control valve 8a, and opening a gas control valve 9a and a gas bottle 9 to fill required gas;
e. a switch of a time schedule controller 4 is turned on, the time schedule controller 4 firstly triggers a high-speed camera 6 and a data collector 7, then triggers an electric spark generator 3, and the electric spark generator 3 controls a first electrode 1b and a second electrode 1c to carry out electric spark discharge;
f. recording voltage and current data under different experimental parameters through a data acquisition unit, and quantitatively evaluating the discharge power, the discharge energy and the discharge efficiency of the electric spark through electric spark energy integral calculation; meanwhile, an electric spark pressure ripple image under different parameters and different time is obtained by using a high-speed camera and combining with a schlieren technology, the pressure wave propagation process of the electric spark is analyzed and calculated, and the influence characteristics of different parameters on the electric spark pressure wave propagation speed and the energy field distribution are evaluated.
In the electrostatic spark energy evaluation device under the variable initial pressure of the inert atmosphere, the second electrode 1c is driven to rotate by rotating the outer sleeve 1g, and the angle between the two required electrodes is adjusted. Micrometer 2 through adjusting and second electrode 1c fixed connection is 0mm to two electrode gap, takes notes micrometer 2's scale this moment, then adjusts micrometer 2 to required electrode gap scale once more to reach electrode gap's accurate control. The two electrodes are connected with the electric spark generation chamber 1 through the sealing joint 1i, the first electrode 1b and the second electrode 1c are sealed, fixed and insulated through rubber ring extrusion, and the electrodes can be detached through the design of the sealing joint 1i, so that different electrode materials and electrode tips can be replaced. The device can evaluate the electrostatic spark energy of different electrodes, different electrode angles and different electrode gap parameters.
The static spark energy evaluation device under the variable initial pressure of the inert atmosphere builds a required gas environment in the electric spark generation chamber 1 through a gas distribution system, and realizes static spark discharge under different pressures and inert gas environments, so that the static spark energy under different initial pressures and different inert atmospheres is evaluated.
The device uses a vacuum pump 8 in a gas distribution device to pump away gas in an electric spark generation chamber 1, creates a vacuum environment, uses a gas cylinder 9 to fill air for pressurization, and uses the indication of a pressure gauge 1a and a vacuum control valve 8a to adjust and control the amount of air filled in the electric spark generation chamber 1, thereby creating a required initial pressure or a required inert gas environment in the electric spark generation chamber 1.
The electric spark generator 3 comprises a high-voltage power supply, a relay, a high-voltage capacitor and a high-voltage resistor. And turning on the high-voltage power supply, regulating the required charging voltage and current through the high-voltage power supply, and selecting the capacitor with the required capacity through the capacitor selection relay so as to select a proper energy group. And closing the charging relay to charge the capacitor, and disconnecting the charging loop relay after the charging is finished when the charging current is zero. And closing a discharge loop relay, and performing electric spark discharge on the two electrodes. When the electrode is not broken down, the discharge relay needs to be closed to discharge the capacitance energy.
And closing a switch of the time schedule controller 4, triggering the high-speed camera 6 by the time schedule controller 4, triggering the data collectors and 7 by the high-speed camera 6, triggering the discharge loop relay by the time schedule controller 4, and performing electric spark discharge on the two electrodes, thereby realizing the recording of voltage and current data and electric spark pressure wave schlieren images in the whole electric spark discharge process.
The invention relates to an energy evaluation method of an electrostatic spark energy device under variable initial pressure of inert atmosphere, which comprises the following steps: under different experimental parameters, the data acquisition unit 7, the voltage probe 7b and the current probe 7a are used for acquiring and recording voltage and current waveform data of the electric spark in real time, the power of the electric spark is calculated through the product of the voltage and the current, the energy is calculated through the integral of the power and the time, the discharge efficiency of the spark energy is calculated through the ratio of the integral spark energy to the stored energy, and the influence characteristics of different parameters on the discharge waveform of the electric spark, the spark energy and the discharge efficiency of the spark energy are evaluated. Meanwhile, a high-speed camera 6 is combined with a schlieren technology to shoot spark pressure ripple images of different parameters and different moments, pressure wave energy is calculated by using the obtained pressure wave radius, and the influence characteristics of the different parameters on the propagation speed of the spark pressure wave and the distribution of the pressure wave energy field are evaluated. Therefore, the electrostatic spark energy characteristics under different parameters within the energy range of 32mJ-3J can be researched.
Finally, supplementary explanation is that the electrostatic spark energy device under the variable initial pressure of the inert atmosphere belongs to a 32mJ-3J small-energy electric spark energy evaluation device, the operation is simple and reasonable in the experimental process, no danger occurs under the correct operation, and the whole system is safe and reliable to operate.
Claims (3)
1. The utility model provides an electrostatic spark energy evaluation device under variable initial pressure of inert atmosphere, it includes electric spark generating device, data acquisition device and distribution device, its characterized in that: the electric spark generating device comprises an electric spark generating chamber (1), a micrometer (2) and an electric spark generator (3) electrically connected with a time schedule controller (4), wherein the electric spark generating chamber (1) comprises an outer wall (1 h), a window (1 d) and a sealing sleeve (1 g), a pressure gauge (1 a) is arranged on the outer wall (1 h), the end part of the outer wall (1 h) fixes the window (1 d) through a flange (1 e) and a flange bolt (1 f), and the sealing sleeve (1 g) is sleeved at the middle position of the outer wall (1 h); an outer wall slot (1 k) with an arc length of 90 degrees is arranged on the outer wall (1 h), one end of a first electrode (1 b) fixed on the outer wall (1 h) away from the outer wall slot (1 k) is provided with the arc length of 90 degrees, and the other end is provided with the arc length of 180 degrees; a sleeve slot (1 j) with the arc length of 90 degrees is arranged on the sealing sleeve (1 g), one end of a second electrode (1 c) fixed on the sealing sleeve (1 g) away from the sleeve slot (1 j) is provided with the arc length of 90 degrees, and the other end is provided with the arc length of 180 degrees; between the outer wall (1 h) and the sealing sleeve (1 g), two sides of the outer wall open slot (1 k) are respectively provided with an O-shaped sealing ring (1 m), and the periphery of the outer wall open slot (1 k) is provided with another O-shaped sealing ring positioned in the open slot peripheral sealing groove (1 p); the outer end of the first electrode (1 b) is electrically connected with the anode of the electric spark generator (3), the outer end of the second electrode (1 c) is electrically connected with the cathode of the electric spark generator (3) and is fixedly connected with the micrometer (2); the parts of the first electrode (1 b) and the second electrode (1 c) extending into the outer wall (1 h) are adjusted to the mutually vertical positions of the second electrode (1 c) and the first electrode (1 b) at the same opposite linear position by rotating the sealing sleeve (1 g), and the adjusting angle is 180-90 degrees;
the data acquisition device comprises a high-speed camera (6) and a data acquisition unit (7), the head of the high-speed camera (6) is aligned to a window (1 d) at the end part of the outer wall (1 h), the high-speed camera (6) is electrically connected with a computer (5), a time schedule controller (4) and the data acquisition unit (7), the data acquisition unit (7) is in contact connection with the anode of a first electrode (1 b) through a voltage probe (7 a), and a current probe (7 b) is sleeved on a second electrode (1 c);
the gas distribution device comprises a vacuum pump (8) and a gas bottle (9), wherein the vacuum pump (8) is connected with a tee joint (10 a) through a vacuum control valve (8 a), one side of the tee joint (10 a) is connected with the gas bottle (9) through a gas control valve (9 a), and the other side of the tee joint is communicated with an inner cavity of the electric spark generation chamber (1) through a gas pipeline (10).
2. The inert atmosphere variable initial pressure electrostatic spark energy assessment device according to claim 1, wherein: the electrode assembly is characterized in that the first electrode (1 b), the second electrode (1 c) and the sealing joint (1 i) are in insulation sealing through rubber rings, an outer wall threaded hole is formed in an outer wall (1 h) at the bottom of the sleeve slot (1 j), the first electrode (1 b) is in threaded connection with the outer wall threaded hole through one sealing joint (1 i), a sleeve threaded hole is formed in a sealing sleeve (1 g) at the bottom of the outer wall slot (1 k), the second electrode (1 c) is in threaded connection with the sleeve threaded hole through the other sealing joint (1 i), and the end of the second electrode (1 c) is fixedly connected with the measuring end of the micrometer (2) through a tetrafluoroethylene part.
3. The method for evaluating an electrostatic spark energy evaluation device under an inert atmosphere variable initial pressure according to claim 1, comprising the steps of:
a. rotating the sealing sleeve (1 g), wherein the sealing sleeve (1 g) drives the second electrode (1 c) to rotate, and the angle between the second electrode (1 c) and the first electrode (1 b) is adjusted to be 180-90 DEGoA value in between;
b. rotating the micrometer (2) to adjust the gap between the second electrode (1 c) and the first electrode (1 b), wherein the gap between the two electrodes is a value between 0 and 10 mm;
c. changing the voltage and the capacitance of an electric spark generator (3), and adjusting the value of electric spark energy generated between a first electrode (1 b) and a second electrode (1 c) to be 32 mJ-3J;
d. opening a vacuum pump (8) and a vacuum control valve (8 a), reducing the pressure in the electric spark generating chamber (1) to a vacuum state, closing the vacuum pump (8) and the vacuum control valve (8 a), and opening a gas control valve (9 a) and a gas bottle (9) to fill required gas;
e. a switch of a time schedule controller (4) is turned on, the time schedule controller (4) firstly triggers a high-speed camera (6) and a data collector (7), then triggers an electric spark generator (3), and the electric spark generator (3) controls a first electrode (1 b) and a second electrode (1 c) to carry out electric spark discharge;
f. recording voltage and current data under different experimental parameters through a data acquisition unit, and quantitatively evaluating the discharge power, the discharge energy and the discharge efficiency of the electric spark through electric spark energy integral calculation; meanwhile, an electric spark pressure ripple image under different parameters and different time is obtained by using a high-speed camera and combining with a schlieren technology, the pressure wave propagation process of the electric spark is analyzed and calculated, and the influence characteristics of different parameters on the electric spark pressure wave propagation speed and the energy field distribution are evaluated.
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