Universal discharge experiment platform with controllable temperature, humidity and illumination and use method

Abstract

The invention belongs to the technical field of electrodes and electric fields, and relates to a universal discharge experiment platform with controllable temperature, humidity and illumination and a use method.The universal discharge experiment platform comprises an environment experiment cabin and an industrial personal computer, an organic glass cavity, a fan and an environment parameter measuring unit are arranged in the environment experiment cabin, and an ultraviolet light generator is arranged on one side of the organic glass cavity; the organic glass cavity is internally provided with a parallel plate electrode, the parallel plate electrode is connected with a distance adjusting device, the distance adjusting device is connected with an electrical parameter measuring system and a protective resistor through a high-voltage cable, and the parallel plate electrode, the distance adjusting device, the electrical parameter measuring system and the protective resistor form a current loop; the environment experiment cabin body is also communicated with a temperature and humidity control unit; and the fan, the electrical parameter measuring system, the temperature and humidity control unit and the environmental parameter measuring unit are electrically connected with the industrial personal computer. The device has multiple adjustable factors for environmental factors, is large in range, is high in adjustment precision, and can be used for researching the influence of various environmental factors on discharge.

Description

Technical Field

[0001] The invention belongs to the technical field of electrodes and electric fields, and relates to a universal discharge experimental platform with controllable temperature, humidity and light, and a use method thereof. Background Art

[0002] Air discharge technology for different temperature and humidity environments has a wide range of applications in many fields. For example, in power systems, this technology can be used to improve the insulation performance and operational reliability of electrical equipment; in communication systems, it can be used to improve the stability and anti-interference ability of signal transmission; in medical equipment, it can be used to ensure the electrical safety of equipment and the safety of patients, etc.

[0003] The patent with publication number CN107907810A discloses a parallel plate electrode electromagnetic field irradiation discharge system with adjustable vacuum degree. This technology has limited smoothness due to the lack of additional processing of the parallel plate electrodes, which in turn affects the accuracy of the experimental results. At the same time, its adjustable variables are only air pressure and electromagnetic radiation, and the degree of simulation of actual application scenarios is limited. The use of coaxial cables for electrical connection can only conduct safe and stable experiments within a specific voltage range, and the applicable voltage range is limited. In addition, the measurement accuracy is limited when using an oscilloscope, and it cannot be extended to related experimental research on microcurrent discharge; and the existing technologies for air discharge in different temperature and humidity environments have certain defects or shortcomings: the applied electric field is uneven and difficult to accurately describe mathematically; there are burrs or defects in the electrode structure, and smoothness is difficult to ensure; the temperature and humidity adjustment range is relatively limited, and the simulation of the natural environment is not comprehensive; the experimental measurement platform is small in size and is seriously interfered by various parts under high voltage; the current measurement accuracy is low, and microcurrent measurement experiments cannot be carried out, and it is difficult to conduct research on microscopic discharge parameters; most of the existing technologies are only used in DC or AC voltage environments, and some platform structures are difficult to adapt to various types of electrical environments, and the application scenarios are limited. Summary of the invention

[0004] The purpose of the present invention is to provide a universal discharge experimental platform with controllable temperature, humidity and light, and a method of use, so as to solve the technical problems that the experimental platform in the prior art is only used in a DC or AC voltage environment, some structures of the platform are difficult to adapt to various types of electrical environments, and the application scenarios are limited.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A universal discharge experiment platform with controllable temperature, humidity and illumination comprises: an environmental experiment cabin and an industrial computer, wherein an organic glass cavity, a fan and an environmental parameter measurement unit are arranged in the environmental experiment cabin, an ultraviolet light generator is arranged on one side of the organic glass cavity, a parallel plate electrode is arranged in the organic glass cavity, the parallel plate electrode is connected with a distance adjustment device, and the distance adjustment device is arranged outside the organic glass cavity, the distance adjustment device is connected with an electrical parameter measurement system and a protective resistor through a high-voltage cable, and the parallel plate electrode, the distance adjustment device, the electrical parameter measurement system and the protective resistor form a current loop; the environmental experiment cabin is also connected with a temperature and humidity control unit; the fan, the electrical parameter measurement system, the temperature and humidity control unit and the environmental parameter measurement unit are all electrically connected to the industrial computer.

[0006] Preferably, the parallel plate electrode is a smooth parallel plate electrode based on a Rogowski plate electrode, and its smoothness is at the level of 10 microns.

[0007] Preferably, the parallel plate electrode includes an upper plate and a lower plate, the upper plate is fixedly connected to the top of the organic glass cavity through the connecting end of the pressure equalizing ball, the pressure equalizing ball is located outside the organic glass cavity and is electrically connected to the protective resistor outside the environmental experiment chamber, and the lower plate is detachably connected to the distance adjusting device.

[0008] Preferably, the upper and lower surfaces of the organic glass cavity and the connection points with the pressure equalizing ball and the distance adjusting device are all insulating fixed structures, and insulators are provided on the other surfaces. The bottom surface of the organic glass cavity is also connected to a detachable supporting foot, and an insulating foot pad is provided at the bottom of the detachable supporting foot; an insulating cover handle is provided on the side wall of the organic glass cavity.

[0009] Preferably, the high-voltage cable passes through the upper and lower ends of the environmental experiment chamber and is electrically connected to the parallel plate electrode and the distance adjustment device respectively. A wall bushing is provided between the high-voltage cable and the environmental experiment chamber, and the thickness of the wall bushing is (1.2~1.5) ;in:

[0010] in, It is the impulse test voltage specified in the standard; is the impulse breakdown electric field strength of insulation; is the aging coefficient.

[0011] Preferably, the distance adjusting device is a micrometer distance adjusting device, including a screw and a distance adjusting cylinder, the screw and the distance adjusting cylinder are connected, and one end of the screw is connected to the parallel plate electrode. When in use, rotating the distance adjusting cylinder allows the screw to drive the parallel plate electrode to translate along the axial direction of the screw.

[0012] Preferably, the electrical parameter measurement system comprises: a Keithley pA meter, an electrometer, a capacitive voltage divider, a coupling capacitor, a Pico acquisition card, a filtering unit and a sampling resistor; the Keithley pA meter, the electrometer and the Pico acquisition card are all electrically connected to an industrial control computer; the filtering unit is coupled and integrated with the probes of the Keithley pA meter (601), the electrometer (602) and the Pico acquisition card (605).

[0013] When measuring the current and voltage at the low voltage end at the same time, the sampling resistor is connected in series to the high voltage cable at the low voltage end. When measuring the current, the Keithley pA meter and the Pico acquisition card are connected in parallel across the sampling resistor; when measuring the voltage, the Keithley pA meter, the electrometer and the Pico acquisition card are connected in parallel across the sampling resistor. When measuring the current at the low voltage end, connect the Keithley pA meter and Pico acquisition card in series to the high voltage cable at the low voltage end through a sampling probe containing a filter unit; When measuring the voltage at the high-voltage end, the high-voltage cable at the high-voltage end is connected to the input end of the capacitive voltage divider, the output end of the capacitive voltage divider is connected to one end of the sampling probe containing the filter unit of the Keithley pA meter or the Pico acquisition card, and the other end of the sampling probe is grounded; When measuring the current at the high-voltage end, the high-voltage cable at the high-voltage end is connected to a coupling capacitor and then a sampling resistor in series, and both ends of the sampling resistor are connected in parallel to a Keithley pA meter or a Pico acquisition card.

[0014] Preferably, the temperature and humidity control unit comprises: an air compressor, an electric heating mechanism and a humidifier. The air compressor, the electric heating mechanism and the humidifier are all connected to the environmental experiment cabin through a pipeline, and the air compressor, the electric heating mechanism and the humidifier are all electrically connected to the industrial control computer.

[0015] Preferably, the fan is connected to a temperature and humidity control unit.

[0016] The second invention is a method for using a universal discharge experimental platform with controllable temperature, humidity and light, comprising: A distance adjusting device is used to adjust the distance between two electrode plates of the parallel plate electrode to a preset value; Turn on the UV light generator, fan and temperature and humidity control unit, and adjust the light intensity, temperature and humidity, and wind speed to the preset values ​​respectively; Connect the power supply, measure the electrical parameters under the preset environmental parameters through the electrical parameter measurement system, and export the experimental result data to the industrial computer.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The present invention discloses a universal discharge experimental platform with controllable temperature, humidity and illumination, which can be used in all experimental situations where parallel plate electrode discharge and related electrical parameter measurement are required, such as the field of gas discharge. Relying on the environmental experimental cabin, the present invention can realize the research on uniform electric field discharge of parallel plate electrodes under different temperatures, different humidity, different ultraviolet illumination and different wind speeds, with a high degree of natural environment simulation and a stable and controllable simulated environment. The environmental control system of the present invention is independent of the discharge equipment, and the electrode structure can be replaced conveniently and quickly. The present invention is suitable for applying various types of voltages, including AC high voltage, DC high voltage, and impulse voltage, with strong pressure resistance and stable operation. The present invention has a wide adjustable range for environmental factors, including wind, light, temperature, humidity and the like, and has high adjustment accuracy. The electrode structure of the present invention is easy to manufacture, the electrode size is large, the electrode surface is basically free of defects such as burrs, and the manufactured electric field has high uniformity. The measurement system of the present invention has high accuracy, strong anti-interference ability, and simple data export of experimental results. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the structure of the organic glass cavity of the present invention; Figure 3 It is a schematic diagram of the parallel plate electrode structure of the present invention; Figure 4 The low voltage end current and voltage measurement circuit diagram of the present invention; Figure 5 The low voltage end current measurement circuit diagram of the present invention; Figure 6 This is a circuit diagram for measuring current and voltage at the high voltage end of the present invention.

[0020] Among them: 1-environmental experiment chamber; 2-ultraviolet light generator; 3-plexiglass cavity; 301-insulator; 302-insulating cover handle; 303-insulating fixing bolt; 304-detachable supporting foot; 305-insulating foot pad; 306-insulating fixing structure; 4-parallel plate electrode; 401-Rogovsky curve surface; 402-electrode edge; 403-parallel section; 5-distance adjustment device; 6-electrical parameter measurement system; 601-Keithley pA meter; 602-electrometer; 603-capacitive voltage divider; 604-coupling capacitor; 605-Pico acquisition card; 606-sampling resistor; 7-temperature and humidity control unit; 8-protection resistor; 9-equalizing ball. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. 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.

[0023] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0024] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0025] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0026] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] The present invention is further described in detail below in conjunction with the accompanying drawings: See also Figure 1 The present application discloses a universal discharge experiment platform with controllable temperature, humidity and light, including: an environmental experiment cabin 1 and an industrial computer, wherein an organic glass cavity 3, a fan and an environmental parameter sensor are arranged in the environmental experiment cabin 1, an ultraviolet light generator 2 is arranged on one side of the organic glass cavity 3, a parallel plate electrode 4 is arranged in the organic glass cavity 3, the parallel plate electrode 4 is connected to a distance adjustment device 5, and the distance adjustment device 5 is arranged outside the organic glass cavity 3, the distance adjustment device 5 is connected to an electrical parameter measurement system 6 and a protective resistor 8 through a high-voltage cable, and the parallel plate electrode 4, the distance adjustment device 5, the electrical parameter measurement system 6 and the protective resistor 8 form a current loop; the environmental experiment cabin 1 is also connected to a temperature and humidity control unit 7; the fan, the electrical parameter measurement system 6, the temperature and humidity control unit 7 and the environmental parameter sensor are all electrically connected to the industrial computer. The present application has a wide range of adjustable environmental factors, covering wind, light, temperature, humidity and other adjustments, and has high adjustment accuracy. The distance between the two electrode plates of the parallel plate electrode 4 is adjusted by the distance adjustment device 5, and the air inside the cabin is circulated by the fan to achieve stable regulation of the temperature and humidity inside the cabin. The research on the uniform electric field discharge of parallel plate electrodes under different temperatures, different humidity, different ultraviolet light, and different wind speeds can be realized, and the degree of natural environment simulation is high and the simulated environment is stable and controllable. The environmental control system of the present invention is independent of the discharge equipment, and the electrode structure can be replaced conveniently and quickly.

[0028] Directions: A method for using a universal discharge experiment platform with controllable temperature, humidity and light, comprising: The distance between the two electrode plates of the parallel plate electrode 4 is adjusted to a preset value by using the distance adjustment device 5; Turn on the ultraviolet light generator 2, the fan and the temperature and humidity control unit 7, and adjust the light intensity, temperature and humidity and wind speed to the preset values ​​respectively; The power supply is connected, and the electrical parameters under the preset environmental parameters are measured by the electrical parameter measurement system 6, and the experimental result data is exported to the industrial computer.

[0029] In some embodiments, the parallel plate electrode 4 is a smooth parallel plate electrode based on a Rogozinski plate electrode, and its smoothness reaches 10 micrometers; see Figure 3 , using the existing Rogozinski electrode structure design formula, the parallel section 403 of the center part of the electrode is extended, and the electrode edge 402 is rounded with a large curvature radius. The parallel section 403 and the electrode edge 402 are between the Rogozinski curve surface 401, thereby designing a parallel plate electrode structure. After finely polishing the brass material as the substrate to achieve a mirror effect, the present invention performs gold plating on the entire electrode so that the surface is basically free of burrs and defects. The simulation calculation of the electric field between the electrodes shows the high uniformity of the electric field. Even the electric field of the non-uniform part of the edge has an electric field strength no higher than the electric field between the electrodes, which minimizes the error of subsequent experimental measurements. The created electric field has a very high uniformity.

[0030] In some embodiments, the parallel plate electrode 4 includes an upper plate and a lower plate. The upper plate is fixedly connected to the top of the organic glass cavity 3 through the connecting end of the pressure equalizing ball 9. The pressure equalizing ball 9 is located outside the organic glass cavity 3 and is electrically connected to the protective resistor 8 outside the environmental experiment chamber 1. The lower plate is detachably connected to the micrometer distance adjustment device 5.

[0031] In some embodiments, see Figure 2 The upper and lower surfaces of the organic glass cavity 3 are connected to the equalizing ball 9 and the micrometer distance adjustment device 5 with insulating fixed structures 306, and the other surfaces are provided with insulators 301. The bottom surface of the organic glass cavity 3 is also connected to a detachable support foot 304, and the bottom of the detachable support foot 304 is provided with an insulating foot pad 305; the side wall of the organic glass cavity 3 is provided with an insulating cover handle 302. The organic glass is fixed by insulating screws, and the screws can be freely removed. Discharge in a 0 wind speed environment can be achieved through the organic glass block, and the light transmittance of the organic glass is not less than 99%, which does not affect the spectral distribution of the light source. The present invention uses a xenon lamp ultraviolet generator PUV to simulate natural environment lighting. The generator has a spectrum of 200 to 1100nm and an adjustable power of 50 to 300W, which completely covers the natural light spectrum. Different environmental lighting can be achieved by using filters.

[0032] In some embodiments, the high-voltage cable passes through the upper and lower ends of the environmental experiment chamber 1 and is electrically connected to the parallel plate electrode 4 and the distance adjustment device 5 respectively. A wall bushing is provided between the high-voltage cable and the environmental experiment chamber 1. The thickness of the wall bushing is (1.2~1.5) ;in:

[0033] in, It is the impulse test voltage specified in the standard; is the impulse breakdown electric field strength of insulation; is the aging coefficient. The aging coefficient K is composed of k2×k3, k2 is 1.2, and k3 is 1.3.

[0034] The insulation thickness of the wall bushing of the present invention can not only withstand AC and DC high voltage, but also withstand large-amplitude impulse voltage. All related high-voltage cables except the wall bushing of the present invention are elevated by an insulating support frame to facilitate accurate calculation of matching resistance during measurement, thereby preventing interference from ground friction, contact static electricity and coupling. The high precision of the matching resistance is also conducive to the accurate measurement of current and voltage of the present invention.

[0035] In some embodiments, the distance adjustment device 5 is a micrometer distance adjustment device, including a screw and a distance adjustment cylinder, the screw and the distance adjustment cylinder are connected, and one end of the screw is connected to the parallel plate electrode 4. When in use, the distance adjustment cylinder is rotated so that the screw can drive the parallel plate electrode 4 to translate along the axial direction of the screw. The gear is screwed in longitudinal adjustment, and the range of adjustment can be achieved from 0 to 30 cm, and the accuracy is at the micrometer level. Applying the principle of micrometer, the distance is adjusted by screwing the distance adjustment cylinder, and the electrode precession mode is direct precession rather than precession, which avoids the influence of extremely subtle differences in the electrode surface on the discharge of different electrode distances.

[0036] In some embodiments, the electrical parameter measurement system 6 includes: a Keithley pA meter 601, an electrometer 602, a capacitive voltage divider 603, a coupling capacitor 604, a Pico acquisition card 605, a filtering unit and a sampling resistor 606; the Keithley pA meter 601, the electrometer 602 and the Pico acquisition card 605 are all electrically connected to an industrial control computer; the filtering unit is coupled and integrated with the probes of the Keithley pA meter (601), the electrometer (602) and the Pico acquisition card (605); the Keithley pA meter 601 is a Keithley 6485 pA meter, the electrometer 602 is a 6517B electrometer, and the Pico acquisition card 605 is a pico6000 acquisition card. The Keithley pA meter can be used with GPIB and RS232 programmable ports to achieve synchronous measurement, and can be combined with a KUSB-488B interface card and kickstart high-impedance software to achieve accurate data recording. The pA meter has a five-and-a-half-digit reading, a 20fA resolution, and an acquisition rate of 1000 times / second. The Keithley pA meter of the present invention is equipped with a shielding cabinet, and a signal amplifier is connected to the interface, which can losslessly amplify the measurement signal to two or ten times, so as to facilitate more accurate measurement and recording. The Keithley 6517B electrometer is used for coordinated measurement, equipped with a special low-current input amplifier, with an input bias current <3fA, a noise of only 0.75fA pp peak-to-peak, and an acquisition rate of 425 times / second. The Pico acquisition card can measure electrical parameters in real time with two channels. The filter unit is coupled to the probe of the measuring instrument (Keithley pA meter 601, electrometer 602, and Pico acquisition card 605), mainly filtering low-frequency electromagnetic noise interference and improving the measurement waveform.

[0037] In some embodiments, the protective resistor 8 of the present invention is a RI80 non-inductive Dahongpao high resistor with a resistance of 1G ohm and a heat dissipation power of 300W, which is suitable for various types of experimental scenarios. The resistor interface is tinned to prevent local discharge at the tip of the interface during high voltage. The present invention uses a voltage-equalizing ball for voltage-equalizing treatment at all cable connections, wall bushing connections, and electrical interfaces of various parts to prevent discharge at electrical connection locations, further eliminating interference in experimental measurements.

[0038] See also Figure 4 When measuring the current and voltage at the low voltage end at the same time, the sampling resistor 606 is connected in series to the high voltage cable at the low voltage end. When measuring the current, the Keithley pA meter 601 and the Pico acquisition card 605 are connected in parallel at both ends of the sampling resistor 606; when measuring the voltage, the Keithley pA meter 601, the electrometer 602 and the Pico acquisition card are connected in parallel at both ends of the sampling resistor 606 through a sampling probe containing a filter unit; in the low voltage end measurement, the sampling resistor 606 or the measuring instrument can be directly connected in series to the ground side.

[0039] See also Figure 5 When measuring the current at the low voltage end, the Keithley pA meter 601 and the Pico acquisition card 605 are connected in series to the high voltage cable at the low voltage end through a sampling probe containing a filter unit; See also Figure 6 When measuring the voltage at the high-voltage end, the high-voltage cable at the high-voltage end is connected to the input end of the capacitive voltage divider 603, the output end of the capacitive voltage divider 603 is connected to one end of a sampling probe containing a filter unit of a Keithley pA meter 601 or a Pico acquisition card 605, and the other end of the sampling probe is grounded; When measuring the current at the high voltage end, the high voltage cable at the high voltage end is connected to the coupling capacitor and then connected in series with the sampling resistor 606 , and both ends of the sampling resistor 606 are connected in parallel with the Keithley pA meter 601 or the Pico acquisition card 605 .

[0040] See also Figure 6 The left half measures current and the right half measures voltage; in the high-voltage end measurement circuit, the "+" is connected to any point between the protection resistor and the voltage-equalizing ball to collect the signal in the high-voltage side line.

[0041] The high voltage signal is stepped down (usually 1000 times) through the capacitive voltage divider 603, and then one end of the sampling probe of the measuring instrument is connected to the output end of the capacitive voltage divider 603 and the other end is grounded to realize voltage signal collection.

[0042] After the discharge high-frequency current signal passes through the coupling capacitor 604, it is converted into a voltage signal through the series-connected sampling resistor 606 (a non-inductive resistor with a matching resistance value), and then connected to the sampling probe of the measuring instrument in parallel with the sampling resistor to realize high-frequency current signal acquisition.

[0043] In some embodiments, the temperature and humidity control unit 7 includes: an air compressor, an electric heating mechanism and a humidifier. The air compressor, the electric heating mechanism and the humidifier are all connected to the environmental experiment chamber 1 through a pipeline, and the air compressor, the electric heating mechanism and the humidifier are all electrically connected to the industrial computer. The industrial computer automatically adjusts the output power of the temperature and humidity control module according to the set parameters.

[0044] In some embodiments, the fan is connected to the temperature and humidity control unit 7. The fan duct is connected to the temperature and humidity control duct, which is the basis for the normal operation of the temperature and humidity adjustment module.

[0045] When both temperature and humidity need to be adjusted, the internal circulating air first flows through the humidity control module and is converted into air containing saturated water vapor. It then flows through the temperature control module, so that the water vapor-containing air is fully heated (cooled) and finally blown into the internal cabin to regulate the temperature and humidity inside the cabin.

[0046] When only the humidity module is turned on, the internal circulating air only flows through the humidity control module and then enters the cabin, avoiding condensation of water vapor in the pipes.

[0047] When only the temperature module is turned on, the internal circulating air only flows through the temperature control module and then enters the cabin.

[0048] In some embodiments, the environmental parameter measurement unit includes: a temperature and humidity sensor, a wind speed sensor, the temperature and humidity sensor model is E+E, wherein there is one temperature measurement probe located at the center of the cabin top, and three humidity measurement probes evenly distributed in a triangle at the cabin top.

[0049] Signals such as temperature and humidity measurement, control, and circulation fan frequency control are collected by the industrial computer (fan and inverter) and connected to the computer via optical fiber. The specific communication method is RS485. The industrial control software on the computer can record the working signals of each device in real time, and can set parameters (temperature and humidity) and send them to the industrial computer. The industrial computer automatically adjusts the output power of the temperature and humidity control module according to the set parameters. The output power is mainly adjusted by controlling the input voltage of the device.

[0050] After setting the frequency of the circulating fan, the wind speed sensor E+E EE650 can be used to measure the wind speed in the cabin with an accuracy of ±0.2m / s, and the frequency of the circulating fan can be manually changed according to this wind speed, ultimately achieving the adjustment of the wind speed inside the cabin.

[0051] The cabin space of the present invention is ample, and the parallel plate diameter is large. Even under high pressure, the uniform electric field created is highly uniform and has a large area, and is basically not affected by edge effects and surrounding metals. Each key component of the present invention is designed with a large margin, and can still operate stably and normally even under extreme environmental high voltage conditions. Relevant experimental studies can be carried out under impulse voltage, DC voltage or AC voltage. The measurement system used in the present invention has high accuracy and can be used to study the effects of various environmental factors on discharge. The temperature and humidity regulation of the present invention is regulated in the cabin, and the cabin space is large. The external air compressor and the fan are connected to the interior of the cabin through pipes, and the structure is circulated in the cabin, avoiding the influence of external air on the temperature and humidity in the cabin. The fan power is adjustable, and the temperature and humidity in the cabin can be evenly distributed in space. The temperature and humidity measurement accuracy reaches ±1°C and ±2% humidity. The fan speed is adjustable, and the wind speed is adjusted dynamically in real time to achieve wind simulation under different environments.

[0052] [Example] Figure 1 As shown, the present invention is a universal discharge experiment platform with controllable temperature, humidity and light, comprising: an environmental experiment cabin 1 and an industrial computer, wherein an organic glass cavity 3, a fan and an environmental parameter sensor are arranged in the environmental experiment cabin 1, an ultraviolet light generator 2 is arranged on one side of the organic glass cavity 3, a parallel plate electrode 4 is arranged in the organic glass cavity 3, the parallel plate electrode 4 is connected to a micrometer distance adjustment device, and the micrometer distance adjustment device is arranged outside the organic glass cavity 3, the micrometer distance adjustment device is connected to an electrical parameter measurement system 6 and a protective resistor 8 through a high-voltage cable, and the parallel plate electrode 4, the micrometer distance adjustment device, the electrical parameter measurement system 6 and the protective resistor 8 constitute a current loop; the environmental experiment cabin 1 is also connected to a temperature and humidity control unit 7; the fan, the electrical parameter measurement system 6, the temperature and humidity control unit 7 and the environmental parameter sensor are all electrically connected to the industrial computer.

[0053] 1) The two opposite surfaces of the parallel plate electrode 4 are composed of a straight line (plane straight line) and a Rogowski electrode curve, and the remaining surfaces (edge ​​curves) are smoothed based on simulation calculations. The parallel plate electrode is modeled as a whole, the electric field distribution around the electrode and between the electrodes is calculated, and the other surfaces of the electrode are smoothed according to the calculation results to ensure that the electric field strength around the electrode is low and uniform, and to suppress unnecessary discharge.

[0054] 2) The organic glass cavity 3 is spliced ​​and bonded, and holes are punched on different surfaces to install insulators, high voltage connection ports and micrometer distance adjustment devices. All structural connection parts are made of insulating epoxy resin to avoid the influence of metal components on the discharge electric field. The cavity distance adjustment mechanism is based on the micrometer principle, and the distance is adjusted by screwing the distance adjustment cylinder. The electrode precession mode is direct precession rather than screwing, which avoids the influence of extremely subtle differences in the electrode surface on the discharge of different electrode distances.

[0055] 3) In the experimental cabin, a fan is used to circulate the air inside the cabin through the three environmental control modules of "electric heating wire heating, air compressor compressed air and water tank plasma humidification" to achieve stable regulation of the temperature and humidity inside the cabin. The cabin is equipped with a real-time monitoring thermometer and hygrometer, and the power of the environmental control module is adjusted through industrial control software to control the temperature and humidity within the target area. The wind speed is controlled by controlling the power of the circulating fan, and the anemometer is used for dynamic adjustment. There is a wall sleeve on the cabin wall, according to the formula The insulation design of the wall bushing enables it to operate safely and stably under various types of high voltages.

[0056] 4) The electrical measurement system consists of a capacitive voltage divider, a 1G ohm non-inductive resistor, several voltage equalizing balls, a pico6000 acquisition card, a Keithley 6485pA meter, and a Keithley 6517B electrometer. The capacitive voltage divider can reduce the high voltage signal by 1000 times to facilitate voltage monitoring without affecting the discharge current signal. The current and voltage measurement system contains an adjustable matching resistor, which adjusts the matching resistor to the wave impedance of the circuit to suppress the target voltage or current wave reflection under different electrode structures, making the measurement results more accurate. The pA meter and electrometer have extremely high accuracy of up to 10 -15 A. You can directly connect a cable with an amplifier to take readings, or you can use an acquisition card to record the experimental results in real time. The Pico acquisition card can simultaneously measure voltage and current in real time with the corresponding software and record them in the computer. The 1G ohm non-inductive resistor needs to be connected in series in the measurement system, usually in series with the discharge electrode, to protect the measurement equipment and personnel during discharge or short circuit. The voltage equalizing ball is placed at each cable connection or the tip of the conductor to suppress discharge at locations other than the discharge electrode, greatly improving the accuracy of the experimental measurement system.

[0057] In summary, the present invention discloses a universal discharge experimental platform with controllable temperature, humidity and illumination, which can be used in all experimental situations where parallel plate electrode discharge and related electrical parameter measurement are required, such as the field of gas discharge. Relying on the environmental experimental chamber, the present invention can realize the research on uniform electric field discharge of parallel plate electrodes under different temperatures, different humidity, different ultraviolet light, and different wind speeds. The degree of natural environment simulation is high and the simulated environment is stable and controllable. The environmental control system of the present invention is independent of the discharge equipment, and the electrode structure can be replaced conveniently and quickly. Using the existing Rogozinski electrode structure design formula, the parallel section 403 of the center part of the electrode is extended, and the electrode edge 402 is rounded with a large curvature radius. The parallel section 403 and the electrode edge 402 are between the Rogozinski curve surface 401, and the parallel plate electrode structure is designed. After fine polishing with brass material as the base to achieve a mirror effect, the present invention performs gold plating on the entire electrode so that its surface is basically free of burrs and defects. The simulation calculation of the electric field between the electrodes shows the high uniformity of the electric field. Even the electric field of the non-uniform part of the edge has an electric field strength not higher than the electric field between the electrodes, which minimizes the error of the subsequent experimental measurement. The created electric field has extremely high uniformity. Discharge in a 0 wind speed environment can be achieved through organic glass blocking. The light transmittance of organic glass is not less than 99%, which does not affect the spectral distribution of the light source. The present invention uses a xenon lamp ultraviolet generator PUV to simulate natural environmental illumination. The generator spectrum is 200 to 1100nm, and the power is adjustable from 50 to 300W, which completely covers the natural light spectrum. Different environmental illumination can be achieved using a filter. It is suitable for applying various types of voltages, including AC high voltage, DC high voltage, and impulse voltage, with strong pressure resistance and stable operation. The present invention has a large adjustable range for environmental factors, including wind, light, temperature, humidity, etc., and has high adjustment accuracy. The electrode structure of the present invention is easy to manufacture, the electrode size is large, the electrode surface is basically free of defects such as burrs, and the manufactured electric field has high uniformity. The measurement system of the present invention has high accuracy, strong anti-interference ability, and simple data export of experimental results. The cabin space of the present invention is ample, and the parallel plate has a large diameter. Even under high voltage, the uniform electric field created is highly uniform and has a large area, and is basically not affected by edge effects and surrounding metals. Each key component of the present invention is designed with a large margin, and can still operate stably and normally even under extreme environmental high voltage conditions. Relevant experimental research can be carried out under impulse voltage, DC voltage or AC voltage. The measurement system used in the present invention has high accuracy and can be used to study the impact of various environmental factors on discharge.

[0058] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A universal discharge experimental platform with controllable temperature, humidity and light, characterized in that: include: An environmental experiment chamber (1) and an industrial control computer are provided in the environmental experiment chamber (1). An organic glass chamber (3), a fan and an environmental parameter measurement unit are provided in the environmental experiment chamber (1). An ultraviolet light generator (2) is provided on one side of the organic glass chamber (3). A parallel plate electrode (4) is provided in the organic glass chamber (3). The parallel plate electrode (4) is connected to a distance adjustment device (5), and the distance adjustment device (5) is provided outside the organic glass chamber (3). The distance adjustment device (5) is connected to an electrical parameter measurement system (6) and a protective resistor (8) via a high-voltage cable. The parallel plate electrode (4), the distance adjustment device (5), the electrical parameter measurement system (6) and the protective resistor (8) form a current loop. The environmental experiment chamber (1) is also connected to a temperature and humidity control unit (7). The fan, the electrical parameter measurement system (6), the temperature and humidity control unit (7) and the environmental parameter measurement unit are all electrically connected to the industrial control computer.

2. A universal discharge experimental platform with controllable temperature, humidity and light according to claim 1, characterized in that: The parallel plate electrode (4) is a smooth parallel plate electrode based on a Rogowski plate electrode, and the smoothness of the parallel plate electrode (4) is at the level of 10 microns.

3. A universal discharge experimental platform with controllable temperature, humidity and light according to claim 1, characterized in that: The parallel plate electrode (4) comprises an upper plate and a lower plate, the upper plate being fixedly connected to the top of the organic glass cavity (3) via the connection end of a pressure equalizing ball (9), the pressure equalizing ball (9) being located outside the organic glass cavity (3) and electrically connected to a protective resistor (8) outside the environmental experiment chamber (1), and the lower plate being detachably connected to the distance adjusting device (5).

4. A universal discharge experimental platform with controllable temperature, humidity and light according to claim 3, characterized in that: The upper and lower surfaces of the organic glass cavity (3) are connected to the equalizing ball (9) and the distance adjusting device (5) with insulating fixed structures (306), and the remaining surfaces are provided with insulators (301). The bottom surface of the organic glass cavity (3) is also connected to a detachable supporting foot (304), and an insulating foot pad (305) is provided at the bottom of the detachable supporting foot (304); and an insulating cover handle (302) is provided on the side wall of the organic glass cavity (3).

5. A universal discharge experimental platform with controllable temperature, humidity and light according to claim 1, characterized in that: The high-voltage cable passes through the environmental test chamber (1) and is electrically connected to the parallel plate electrode (4) and the distance adjustment device (5) at the upper and lower ends thereof. A wall bushing is provided between the high-voltage cable and the environmental test chamber (1). The thickness of the wall bushing is (1.2-1.5) ;in: in, It is the impulse test voltage specified in the standard; is the impulse breakdown electric field strength of insulation; is the aging coefficient.

6. A universal discharge experimental platform with controllable temperature, humidity and light according to claim 1, characterized in that: The distance adjusting device (5) is a micrometer distance adjusting device, comprising a screw and a distance adjusting cylinder, wherein the screw and the distance adjusting cylinder are connected, and one end of the screw is connected to the parallel plate electrode (4). When in use, the distance adjusting cylinder is rotated so that the screw can drive the parallel plate electrode (4) to translate along the axial direction of the screw.

7. A universal discharge experimental platform with controllable temperature, humidity and light according to claim 1, characterized in that: The electrical parameter measurement system (6) comprises: a Keithley pA meter (601), an electrometer (602), a capacitive voltage divider (603), a coupling capacitor (604), a Pico acquisition card (605), a filtering unit and a sampling resistor (606); the Keithley pA meter (601), the electrometer (602) and the Pico acquisition card (605) are all electrically connected to an industrial control computer; the filtering unit is coupled and integrated with the probes of the Keithley pA meter (601), the electrometer (602) and the Pico acquisition card (605); When measuring the current and voltage at the low voltage end at the same time, the sampling resistor (606) is connected in series to the high voltage cable at the low voltage end; when measuring the current, the Keithley pA meter (601) or the Pico acquisition card (605) is connected in parallel to both ends of the sampling resistor (606); when measuring the voltage, the Keithley pA meter (601), the electrometer (602) or the Pico acquisition card (605) is connected in parallel to both ends of the sampling resistor (606) via a sampling probe including a filter unit; When measuring the current at the low voltage end, the Keithley pA meter (601) and the Pico acquisition card (605) are connected in series to the high voltage cable at the low voltage end through a sampling probe including a filter unit; When measuring the voltage at the high-voltage end, the high-voltage cable at the high-voltage end is connected to the input end of the capacitive voltage divider (603), the output end of the capacitive voltage divider (603) is connected to one end of a sampling probe containing a filter unit of a Keithley pA meter (601) or a Pico acquisition card (605), and the other end of the sampling probe is grounded; When measuring the current at the high-voltage end, the high-voltage cable at the high-voltage end is connected to a coupling capacitor and then connected in series with a sampling resistor (606), and both ends of the sampling resistor (606) are connected in parallel with a Keithley pA meter (601) or a Pico acquisition card (605).

8. A universal discharge experimental platform with controllable temperature, humidity and light according to claim 1, characterized in that: The temperature and humidity control unit (7) comprises: an air compressor, an electric heating mechanism and a humidifier; the air compressor, the electric heating mechanism and the humidifier are all connected to the environmental experiment chamber (1) through a pipeline, and the air compressor, the electric heating mechanism and the humidifier are all electrically connected to the industrial control computer.

9. A universal discharge experimental platform with controllable temperature, humidity and light according to claim 1, characterized in that: The fan is connected to the temperature and humidity control unit (7).

10. A method for using the universal discharge experimental platform with controllable temperature, humidity and light according to any one of claims 1 to 9, characterized in that: include: A distance adjustment device (5) is used to adjust the distance between two electrode plates of the parallel plate electrode (4) to a preset value; Turning on the ultraviolet light generator (2), the fan and the temperature and humidity control unit (7), and adjusting the light intensity, temperature and humidity, and wind speed to preset values ​​respectively; The power supply is connected, and the electrical parameters under the preset environmental parameters are measured by the electrical parameter measurement system (6), and the experimental result data is exported to the industrial computer.

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