CN112415291A - Controllable perspective surface charge test system of humiture - Google Patents
Controllable perspective surface charge test system of humiture Download PDFInfo
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- CN112415291A CN112415291A CN202011134449.9A CN202011134449A CN112415291A CN 112415291 A CN112415291 A CN 112415291A CN 202011134449 A CN202011134449 A CN 202011134449A CN 112415291 A CN112415291 A CN 112415291A
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- 238000012360 testing method Methods 0.000 title claims abstract description 50
- 230000000007 visual effect Effects 0.000 claims abstract description 57
- 238000007789 sealing Methods 0.000 claims abstract description 18
- 238000001035 drying Methods 0.000 claims abstract description 9
- 239000000523 sample Substances 0.000 claims description 47
- 239000002274 desiccant Substances 0.000 claims description 19
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 13
- 229910052802 copper Inorganic materials 0.000 claims description 13
- 239000010949 copper Substances 0.000 claims description 13
- 230000003068 static effect Effects 0.000 claims description 13
- 238000000605 extraction Methods 0.000 claims description 2
- 238000012800 visualization Methods 0.000 claims 2
- 238000007599 discharging Methods 0.000 abstract description 15
- 238000005259 measurement Methods 0.000 description 13
- 239000007787 solid Substances 0.000 description 8
- 238000009825 accumulation Methods 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 6
- 239000003989 dielectric material Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000005086 pumping Methods 0.000 description 5
- 230000005684 electric field Effects 0.000 description 4
- 239000011810 insulating material Substances 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 239000011521 glass Substances 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 240000005561 Musa balbisiana Species 0.000 description 1
- 235000018290 Musa x paradisiaca Nutrition 0.000 description 1
- 230000005697 Pockels effect Effects 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000036760 body temperature Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 239000011232 storage material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/24—Arrangements for measuring quantities of charge
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention discloses a perspective surface charge testing system with controllable temperature and humidity, which comprises a visual box body, wherein a drying air inlet cavity, a vacuum air exhaust port, a sealing interface plug-in and a box body operation port are arranged on the visual box body, a sample placing platform is arranged on the bottom surface inside the visual box body, one end of the sample placing platform is connected with an electrostatic testing platform, the other end of the sample placing platform is connected with a discharging platform, a temperature and humidity sensor is arranged inside the visual box body and is connected with an upper computer through a temperature and humidity sensor interface arranged on the visual box body, the electrostatic testing platform and the sample placing platform are connected with the upper computer, and the discharging platform is connected with a power. The invention solves the problem that the test result of the existing test system is greatly influenced by temperature and humidity.
Description
Technical Field
The invention belongs to the technical field of electrostatic measurement, and particularly relates to a perspective surface charge test system with controllable temperature and humidity.
Background
With the development of the power industry, the accumulation of surface charges of solid insulating media in gas insulating equipment under a direct current electric field can cause local electric field distortion of a solid-gas interface, so that the insulation level of a system is reduced, and even the surface breakdown of a solid insulating material is caused if the system is severe. Different dielectric materials differ in their ability to accumulate and dissipate surface charges. The solid dielectric material with strong surface charge accumulation capacity and weak dissipation capacity can be used as an energy storage material and the like; the solid dielectric material with strong surface charge dissipation capability and weak accumulation capability can be used as an insulating material and the like. The measurement of surface charge is therefore of great importance for the study of dielectric materials.
Sources of surface charge accumulation: partial discharge, field emission, solid medium interlayer polarization, uneven or non-linear conductivity distribution, and surface metal particles. Partial discharges, which are the main factor, can occur in high field areas in the insulation system, especially at the insulator and metal electrode interface, when the applied voltage is sufficiently high. These interfaces are likely to have a gas gap due to poor contact, which constitutes a triple junction between metal, solid insulation, and gas, or simply a triple junction. Since the dielectric constant of solid insulation is usually much higher than that of gas, the electric field in the gas gap is greatly enhanced, resulting in partial discharge. The charged particles generated by the partial discharge may escape from the three junctions and reach the surface of the insulator under the action of the electric field. In addition, of the above 5 surface charge generation mechanisms, the latter 3 generally require a long accumulation time, even several hours.
At present, surface charge measurement is easily influenced by external factors such as humidity and temperature, and is also influenced by a sensor structure, and results obtained by different methods are often different. Currently, the surface charge measurement method includes a dust map method, an electrostatic probe method, and an optical measurement of pockels effect. Most studies are conducted separately for the surface charge accumulation and measurement of the solid dielectric material, and during the experiment, the temperature and the humidity are controlled artificially, and when the insulating material is transferred to the measurement position after the discharge, the temperature and the humidity may be changed, so that the experimental result is not strict, and even the study result is wrong. Although the discharge and measurement system of patent No. CN 208314084 is also performed in a closed system, the humidity of the closed system during the experiment is not controlled, and when the humidity reaches a certain degree, the surface conductivity of the surface charge is affected, so as to accelerate the attenuation of the surface charge, and meanwhile, when discharging, because the electronegativity of the water molecules is relatively strong, the discharge is easy to break down due to the easy absorption of electrons. These all may lead to inaccurate results of the surface charge measurement. It is therefore of great importance to ensure that the environmental conditions are controllable in their influence on the results of the surface charge measurements.
Disclosure of Invention
The invention aims to provide a perspective surface charge test system with controllable temperature and humidity, and solves the problem that the test result of the conventional test system is greatly influenced by temperature and humidity.
The technical scheme includes that the perspective surface charge testing system with controllable temperature and humidity comprises a visual box body, a drying air inlet cavity, a vacuum air exhaust port and a box body operation port are formed in the visual box body, a sample placing platform is arranged on the bottom surface inside the visual box body, one end of the sample placing platform is connected with an electrostatic testing platform, the other end of the sample placing platform is connected with a discharging platform, a temperature and humidity sensor is arranged inside the visual box body and connected with an upper computer through a temperature and humidity sensor interface arranged on the visual box body, the electrostatic testing platform and the sample placing platform are connected with the upper computer, and the discharging platform is connected with a power supply.
The present invention is also characterized in that,
the drying air inlet cavity comprises a drying agent cavity, the drying agent cavity is communicated with the visual box body, and an air inlet with a cover cavity is formed in the drying agent cavity.
And a plurality of visual box body inflating holes are formed in the visual box body and are positioned right below the drying agent cavity.
The number of visual box inflation holes is 25, and the aperture is 5 mm.
The sample placing platform comprises a gantry support c, an X-axis guide rail is arranged on the gantry support c, a copper disc electrode is arranged on the X-axis guide rail, the side wall of the copper disc electrode is connected with an X-axis stepping motor, the X-axis stepping motor is connected with a stepping motor control sealing switching port arranged on the visual box body, and the stepping motor control sealing switching port is connected with an upper computer.
The static test platform comprises a gantry support a, one end of the gantry support a is vertically connected with one end of a gantry support c, a Y1 shaft guide rail is horizontally arranged at the other end of the gantry support a, a Y1 shaft guide rail is connected with a static probe through a connecting piece a, the side wall of the connecting piece a is connected with a Y1 shaft stepping motor, a Y1 shaft stepping motor is connected with a stepping motor control sealing switching port, the static probe is connected with a static probe interface arranged on a visual box body, the static probe interface is connected with a static voltmeter, and the static voltmeter is connected with an upper computer position.
The discharging platform comprises a gantry support b, one end of the gantry support b is vertically connected with the other end of the gantry support c, a Y2 shaft guide rail is horizontally arranged at the other end of the gantry support b, a Y2 shaft guide rail is connected with a Z shaft guide rail through a connecting piece c, the side wall of the connecting piece c is connected with a Y2 shaft stepping motor, the Z shaft guide rail is connected with a corona needle through a connecting piece b, the side wall of the connecting piece b is connected with a Z shaft stepping motor, a Y2 shaft stepping motor, the Z shaft stepping motor is connected with a stepping motor control sealing switching port, the corona needle is connected with a discharging probe interface arranged on a visual box body, and the discharging probe interface is connected with a power supply.
A pair of opposite side walls of the visual box body are provided with box body moving handles.
The beneficial effect of the invention is that,
(1) according to the perspective surface charge test system with controllable temperature and humidity, the temperature and humidity in the visual box body can be visually reflected to the extent that the temperature and the humidity reach the experimental requirements through the temperature and humidity sensor, and more rigorous experimental results are provided for the research of surface charges;
(2) according to the perspective surface charge test system with controllable temperature and humidity, the discharge platform and the static test platform are integrated, the time interval from the completion of discharge to the measurement is short, and the influence of time on surface charge attenuation can be ignored;
(3) according to the perspective surface charge test system with controllable temperature and humidity, the influence of the temperature or humidity on the surface charge can be detected through the temperature and humidity sensor.
Drawings
FIG. 1 is a schematic view of a perspective surface charge measurement system with controllable temperature and humidity;
FIG. 2 is a front view of a sample placement platform, an electrostatic testing platform and a discharge platform in a temperature and humidity controllable perspective surface charge testing system according to the present invention;
FIG. 3 is a left side view of a sample placement platform, an electrostatic testing platform, and a discharge platform in a temperature and humidity controllable perspective surface charge testing system according to the present invention;
FIG. 4 is a top view of a sample placement platform, an electrostatic testing platform, and a discharge platform in a temperature and humidity controllable perspective surface charge testing system according to the present invention;
FIG. 5 is a front view of a visual box in a temperature and humidity controllable perspective surface charge testing system of the present invention;
FIG. 6 is a left side view of a visual box in a temperature and humidity controllable perspective surface charge testing system of the present invention;
FIG. 7 is a top view of a visual box in a temperature and humidity controlled perspective surface charge testing system of the present invention;
FIG. 8 is a right side view of a visual box in a temperature and humidity controllable perspective surface charge testing system of the present invention.
In the figure, 1, a cavity with a cover, 2, a desiccant cavity, 3, a visual box body inflation hole, 4, a vacuum pumping hole, 5, a visual box body, 6, a stepping motor control sealing adapter port, 7, an electrostatic probe interface, 8, a discharge probe interface, 9, a temperature and humidity sensor, 10, a box body operation port, 11, a box body moving handle, 12, an electrostatic probe, 13, a corona needle, 14, a copper disc electrode, 15, a gantry support a, 16, an X-axis stepping motor, 17, a Y1-axis stepping motor, 18, a Y2-axis stepping motor, 19, a Z-axis stepping motor, 20, an X-axis guide rail, 21, a Y1-axis guide rail, 22, a Y2-axis guide rail, 23, a Z-axis guide rail, 24, a gantry support b, 25 and a gantry support c are arranged.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention relates to a perspective surface charge testing system with controllable temperature and humidity, which is shown in a figure 1, a figure 5, a figure 6, a figure 7 and a figure 8 and comprises a visual box body 5, wherein the visual box body 5 is made of vacuum glass, the vacuum glass is selected to effectively prevent the box body temperature from being influenced by the temperature of the external environment, a drying air inlet cavity, a vacuum air suction port 4 and a box body operation port 10 are arranged on the visual box body 5, a sample placing platform is arranged on the bottom surface in the visual box body 5, one end of the sample placing platform is connected with an electrostatic testing platform, the other end of the sample placing platform is connected with a discharging platform, a temperature and humidity sensor 9 is arranged in the visual box body 5, the temperature and humidity sensor 9 is connected with an upper computer through a temperature and humidity sensor interface arranged on the visual box body 5, the electrostatic testing platform, one pair of opposite side walls of the visual box body 5 is provided with a box body moving handle 11.
The drying air inlet cavity comprises a drying agent cavity 2, the drying agent cavity 2 is communicated with a visual box body 5, a cavity air inlet 1 with a cover is formed in the drying agent cavity 2, a plurality of visual box body inflation holes 3 are formed in the visual box body 5 and located under the drying agent cavity 2, the number of the visual box body inflation holes 3 is 25, the aperture is 5mm, the visual box body inflation holes 3 are used for preventing drying agents from falling into the box body and during inflation, enough air inflow is achieved, and a drying machine is placed in the drying agent cavity 2.
The vacuum extraction opening 4 is embedded with the visual box body 5 in a sealing mode, the cavity air inlet 1 with the cover is sealed with the drying agent cavity 2 through the cover, and the contact part of the drying agent cavity 2 and the visual box body 5 is connected in a sealing mode.
The sample placing platform comprises a gantry support c25, an X-axis guide rail 20 is arranged on the gantry support c25, a copper disc electrode 14 is arranged on the X-axis guide rail 20, the side wall of the copper disc electrode 14 is connected with an X-axis stepping motor 16, the X-axis stepping motor 16 is connected with a stepping motor control sealing switching port 6 arranged on the visual box body 5, the stepping motor control sealing switching port 6 is connected with an upper computer, and an insulating material is arranged on the copper disc electrode 14.
As shown in fig. 2, 3 and 4, the electrostatic testing platform includes a gantry support a15, one end of the gantry support a15 is vertically connected with one end of a gantry support c25, a Y1 shaft guide rail 21 is horizontally arranged at the other end of the gantry support a15, the Y1 shaft guide rail 21 is connected with an electrostatic probe 12 through a connector a, the aperture of the electrostatic probe 12 is 4mm, the size is 13mm × 75mm, the side wall of the connector a is connected with a Y1 shaft stepping motor 17, the Y1 shaft stepping motor 17 is connected with a stepping motor control sealing adapter port 6, the electrostatic probe 12 is connected with an electrostatic probe interface 7 arranged on the visual box 5, the electrostatic probe interface 7 is connected with an electrostatic voltmeter, the electrostatic voltmeter is connected with an upper computer, and the electrostatic voltmeter adopts Trek, Model 542-2-CE.
The discharging platform comprises a gantry support b24, one end of the gantry support b24 is vertically connected with the other end of the gantry support c25, a Y2 shaft guide rail 22 is horizontally arranged at the other end of the gantry support b24, the Y2 shaft guide rail 22 is connected with a Z shaft guide rail 23 through a connecting piece c, the side wall of the connecting piece c is connected with a Y2 shaft stepping motor 18, the Z shaft guide rail 23 is connected with a corona needle 13 through a connecting piece b, the diameter of the corona needle 13 is 0.3mm, the side wall of the connecting piece b is connected with a Z shaft stepping motor 19, the Y2 shaft stepping motor 18 and the Z shaft stepping motor 19 are connected with a stepping motor control sealing adapter port 6, the corona needle 13 is connected with a discharging probe interface 8 arranged on a visual box body 5, and the discharging probe interface 8 is connected with a.
The Y1 axle guide rail is arranged in parallel with the Y2 guide rail.
The discharging probe interface 8 adopts a banana head, the stepping motor controls the sealed adapter interface 6 to adopt DB9 double female heads, the static probe interface 7 adopts an aviation plug socket, the temperature and humidity sensor interface adopts a thread seal M20X 1.5, and the sealed interface plug-in is embedded in the inner surface of the box body in a sealing way.
The working process of the temperature and humidity controllable perspective surface charge testing system comprises the following steps: opening a box body operation port 10, placing a sample on a copper disc electrode 14, closing the box body operation port 10, opening a cavity air inlet 1 with a cover, putting a drying machine into a drying agent cavity 2 in advance, opening the drying machine, filling dry gas into a visual box body 5 through the drying agent cavity 2, simultaneously opening a vacuum pumping port 4 to discharge wet gas, measuring the humidity in the visual box body 5 by using a temperature and humidity sensor 9, when the humidity meets the experimental requirements, sealing the cavity air inlet 1 with the cover by using a cover body on the cavity air inlet 1 with the cover, pumping vacuum through the vacuum pumping port 4, starting testing after the pumping vacuum is finished, driving the copper disc electrode 14 to move on an X-axis guide rail 20 by using an X-axis stepping motor 16, moving the sample to be right below a corona needle 13, driving the corona needle 13 to be positioned on a Z-axis guide rail 23 by using a Z-axis stepping motor 19, driving the Z-axis guide rail 23 to move on a Y2-axis guide rail by using a Y2-axis stepping motor, adjusting the position of the point corona needle 13 to enable the discharge distance between the corona needle 13 and the copper disc electrode 14 to meet the experiment requirement, after the discharge time is finished, driving the copper disc electrode 14 to move on the X-axis guide rail 20 through the X-axis stepping motor 16 again, moving the sample to the lower part of the electrostatic probe 12, driving the copper disc electrode on the X-axis guide rail 20 to move along the X axis through the X-axis stepping motor 16, controlling the electrostatic probe 12 on the Y1 axis guide rail 21 to move along the Y1 axis through the Y1 axis stepping motor 17, and simultaneously uploading the experiment result to the upper machine position.
In addition, the surface charge test system can also implement multi-point position discharge, the movement of the Y1 axis guide rail is controlled, so that the corona needle 13 moves along the Y1 axis, multi-point discharge is carried out in the central local area, and the influence of the positive central discharge of the material and the discharge in the central local area on the charge of the whole body surface is compared through the measurement result after the discharge.
Through the mode, the perspective surface charge test system with controllable temperature and humidity is provided with the visual box body 5, so that the test process and conditions can be observed in real time; the temperature and humidity sensor is arranged, the degree of the temperature and the humidity in the visual box body reaching the experiment requirements is visually embodied through the temperature and humidity sensor, and a more rigorous experiment result is provided for the research of the surface charge; the discharging platform and the static testing platform are integrated, the time interval from the completion of discharging to the measurement is short, and the influence of time on the attenuation of surface charges can be ignored.
Claims (8)
1. The utility model provides a controllable perspective surface charge test system of humiture, its characterized in that, includes visual box (5), be provided with dry air inlet cavity, vacuum extraction opening (4) and box operation mouth (10) on visual box (5), the inside bottom surface of visual box (5) is provided with sample place the platform, sample place the platform's one end is connected with static test platform, sample place the platform's the other end is connected with the platform that discharges, the inside of visual box (5) is provided with temperature and humidity sensor (9), temperature and humidity sensor (9) are connected with the host computer through the temperature and humidity sensor interface that sets up on visual box (5), static test platform, sample place the platform and host computer connection, discharge the platform and power connection.
2. The perspective surface charge testing system with controllable temperature and humidity according to claim 1, wherein the drying air inlet cavity comprises a drying agent cavity (2), the drying agent cavity (2) is communicated with a visual box body (5), and a cavity air inlet (1) with a cover is arranged on the drying agent cavity (2).
3. The perspective surface charge testing system with controllable temperature and humidity according to claim 2, wherein a plurality of visual box body air charging holes (3) are formed in the visual box body (5) and located right below the desiccant cavity (2).
4. The perspective surface charge test system with controllable temperature and humidity according to claim 3, wherein the number of the visual box body inflation holes (3) is 25, and the aperture is 5 mm.
5. The perspective surface charge testing system with the controllable temperature and humidity according to claim 1, wherein the sample placement platform comprises a gantry support c (25), an X-axis guide rail (20) is arranged on the gantry support c (25), a copper disc electrode (14) is arranged on the X-axis guide rail (20), an X-axis stepping motor (16) is connected to the side wall of the copper disc electrode (14), the X-axis stepping motor (16) is connected with a stepping motor control sealing switching port (6) arranged on the visual box body (5), and the stepping motor control sealing switching port (6) is connected with an upper computer.
6. The temperature and humidity controllable perspective surface charge test system of claim 5, the static test platform comprises a gantry support a (15), one end of the gantry support a (15) is vertically connected with one end of a gantry support c (25), a Y1 shaft guide rail (21) is horizontally arranged at the other end of the gantry support a (15), the Y1 shaft guide rail (21) is connected with the electrostatic probe (12) through a connector a, the side wall of the connecting piece a is connected with a Y1 shaft stepping motor (17), the Y1 shaft stepping motor (17) is connected with a stepping motor control sealing adapter (6), the electrostatic probe (12) is connected with an electrostatic probe interface (7) arranged on the visual box body (5), the electrostatic probe interface (7) is connected with an electrostatic voltmeter, and the electrostatic voltmeter is connected with the upper machine position.
7. The perspective surface charge test system with controllable temperature and humidity according to claim 6, wherein the discharge platform comprises a gantry support b (24), one end of the gantry support b (24) is vertically connected with the other end of the gantry support c (25), a Y2 shaft guide rail (22) is horizontally arranged at the other end of the gantry support b (24), the Y2 shaft guide rail (22) is connected with a Z shaft guide rail (23) through a connecting piece c, the side wall of the connecting piece c is connected with a Y2 shaft stepping motor (18), the Z shaft guide rail (23) is connected with a corona needle (13) through a connecting piece b, the side wall of the connecting piece b is connected with a Z shaft stepping motor (19), the Y2 shaft stepping motor (18) and the Z shaft stepping motor (19) are connected with a stepping motor control sealing transfer port (6), and the corona needle (13) is connected with a discharge probe interface (8) arranged on the visualization box body (5), the discharge probe interface (8) is connected with a power supply.
8. The temperature and humidity controllable perspective surface charge testing system of claim 1, wherein box moving handles (11) are arranged on one pair of opposite side walls of the visualization box body (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011134449.9A CN112415291A (en) | 2020-10-21 | 2020-10-21 | Controllable perspective surface charge test system of humiture |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011134449.9A CN112415291A (en) | 2020-10-21 | 2020-10-21 | Controllable perspective surface charge test system of humiture |
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| CN112415291A true CN112415291A (en) | 2021-02-26 |
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| CN202011134449.9A Pending CN112415291A (en) | 2020-10-21 | 2020-10-21 | Controllable perspective surface charge test system of humiture |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113281578A (en) * | 2021-04-27 | 2021-08-20 | 西安理工大学 | Photoelectric integrated constant-humidity surface potential measuring system based on three-axis motion platform |
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|---|---|---|---|---|
| CN102520259A (en) * | 2011-12-09 | 2012-06-27 | 天津大学 | Multi-sample surface charge measuring device |
| CN107907750A (en) * | 2017-11-23 | 2018-04-13 | 华北电力大学 | A kind of thermostimulation surface potential self-operated measuring unit, system and method |
| CN208314084U (en) * | 2018-06-05 | 2019-01-01 | 沈阳工业大学 | A kind of polymer surfaces charge and trap level characteristic measuring device |
| CN111239507A (en) * | 2019-11-05 | 2020-06-05 | 南方电网科学研究院有限责任公司 | Oil paper insulation surface charge measuring device and measuring method thereof |
-
2020
- 2020-10-21 CN CN202011134449.9A patent/CN112415291A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102520259A (en) * | 2011-12-09 | 2012-06-27 | 天津大学 | Multi-sample surface charge measuring device |
| CN107907750A (en) * | 2017-11-23 | 2018-04-13 | 华北电力大学 | A kind of thermostimulation surface potential self-operated measuring unit, system and method |
| CN208314084U (en) * | 2018-06-05 | 2019-01-01 | 沈阳工业大学 | A kind of polymer surfaces charge and trap level characteristic measuring device |
| CN111239507A (en) * | 2019-11-05 | 2020-06-05 | 南方电网科学研究院有限责任公司 | Oil paper insulation surface charge measuring device and measuring method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113281578A (en) * | 2021-04-27 | 2021-08-20 | 西安理工大学 | Photoelectric integrated constant-humidity surface potential measuring system based on three-axis motion platform |
| CN113281578B (en) * | 2021-04-27 | 2022-10-11 | 西安理工大学 | Photoelectric integrated constant-humidity surface potential measuring system based on three-axis motion platform |
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