CN208297661U - A kind of aerosol design of Electrical Parameter Measurement System - Google Patents
A kind of aerosol design of Electrical Parameter Measurement System Download PDFInfo
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- CN208297661U CN208297661U CN201820708455.2U CN201820708455U CN208297661U CN 208297661 U CN208297661 U CN 208297661U CN 201820708455 U CN201820708455 U CN 201820708455U CN 208297661 U CN208297661 U CN 208297661U
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Abstract
The utility model provides a kind of aerosol design of Electrical Parameter Measurement System, gas collecting device, test device, manipulation and the display device being electrically connected including master control set and respectively with the master control set；Gas collecting device includes air suction module, the gas access of air suction module and air communication, and the gas vent of air suction module is connected to the gas access of test device, and the control terminal of air suction module is electrically connected with the pumping control terminal of master control set；Test device includes test container and the measurement module for measuring aerosol electric parameter, test liquid is equipped in test container, the test side of measurement module is protruded into test fluid body, the gas access of test container is connected to the gas access of test device, and the output end of measurement module is electrically connected with the first signal input part of master control set.The utility model can effectively assess the variation of insulator dielectric performance when haze weather occurs, and then support for the data that the evaluation of the safe and reliable operation and Insulators Used of power grid provides quantization.
Description
Technical field
The utility model relates to electric power safety detection technique fields, more particularly, to a kind of aerosol measurement of electric parameter system
System.
Background technique
Currently, haze weather is multiple, potential hidden danger is brought to the safe and stable operation of power grid.In haze weather,
The insulation electric conductivity of air declines, and the class of insulation that will lead to Technologies For The Insulators In Power System declines therewith.
In the prior art, the insulation performance measurement scheme for insulator in haze weather will be usually collected into
Insulator surface salt ash is dissolved in detection liquid, is measured using equipment such as conductance instruments to solution, to obtain correlation
Parameter.But collect insulator surface salt ash when, it is necessary to route is powered off, insulator could be sampled wiping with
Salt ash is collected, does not only result in that operation difficulty is larger, process is complicated in this way, and convenience is poor.
Utility model content
The utility model provides a kind of aerosol design of Electrical Parameter Measurement System, to solve existing insulator dielectric performance
The technical problem that measurement scheme operating process is complicated and convenience is poor, thus insulator when effectively assessment haze weather occurs
The variation of insulation performance, and then the evaluation for the safe and reliable operation and insulator correlated performance of power grid provides the data branch of quantization
It holds.
In order to solve the above-mentioned technical problem, the utility model provides a kind of aerosol design of Electrical Parameter Measurement System, including master
Control device and gas collecting device, test device, manipulation and the display device being electrically connected respectively with the master control set；
The gas collecting device includes air suction module, the gas access of the air suction module and air communication, the pumping
The gas vent of gas module is connected to the gas access of the test device, and the control terminal of the air suction module and the master control fill
The pumping control terminal electrical connection set；
The test device includes test container and the measurement module for measuring aerosol electric parameter, and the test is held
Test liquid is equipped in device, the test side of the measurement module is protruded into the test fluid body, and the gas of the test container enters
Mouth is connected to the gas access of the test device, and the output end of the measurement module and the first signal of the master control set are defeated
Enter end electrical connection.
Preferably, the test device further includes temperature and humidity measurement module, the inspection of the temperature and humidity measurement module
It surveys end to be set in external environment, the output end of the temperature and humidity measurement module and the second signal input terminal electricity of the master control set
Connection.
Preferably, the test device further includes for detecting test liquid liquid in the test container
The level gauging module of position, the output end of the level gauging module are electrically connected with the third signal input part of the master control set
It connects.
Preferably, the gas collecting device further includes flow measurement module, the inspection of the flow measurement module
Survey end, which is set to, to be connected in the conduit between the gas vent of the air suction module and the gas access of the test device, described
The output end of flow measurement module is electrically connected with the fourth signal input terminal of the master control set.
Preferably, the gas collecting device further includes gas storage module, the gas access of the gas storage module with
The gas vent of the air suction module is connected to, and the gas vent of the gas storage module and the gas access of the test device connect
It is logical, and the test side of the flow measurement module is set to the gas vent and the test device for being connected to the gas storage module
In conduit between gas access.
Preferably, the gas collecting device further includes irradiation modules, the gas access of the irradiation modules with
The gas vent of the gas storage module is connected to, and the gas access of the gas vent of the irradiation modules and the test device connects
It is logical, and the test side of the flow measurement module is set to the gas vent and the test device for being connected to the irradiation modules
In conduit between gas access.
Preferably, the aerosol design of Electrical Parameter Measurement System further includes the nothing for being used for transmission data to Internet of Things
Line communication device, the input terminal of the wireless communication device are electrically connected with the wireless signal output end of the master control set.
Preferably, the manipulation and display device include function setting module and data processing and display module,
The function setting module, the data processing are electrically connected with display module with the master control set.
Preferably, the master control set includes liquid level warning module, the input terminal of the liquid level warning module with
The third signal input part of the master control set is electrically connected.
Preferably, the measurement module is conductance instrument, and the conductance instrument is surveyed with conductivity
Amount probe, the conductivity measurement probe protrudes into the test fluid body, and the output end of the conductance instrument with it is described
First signal input part of master control set is electrically connected.
Compared with the prior art, the beneficial effect of the utility model embodiment is:
Air is acquired by the gas collecting device and is transported in the test device, and air is passed through in test liquid
Fluid sample is tested to obtain, the test device measures test liquid and sends the master control for measurement data and fills
Set carry out data process&analysis, thus obtain aerosol measurement of electric parameter as a result, in order to inverse air resistivity change
Change situation, comes the situation of change of Technologies For The Insulators In Power System insulation performance when qualitative or even quantitative assessment haze weather occurs, Jin Eryou
Change the design of insulator.
In haze weather, the aerosol design of Electrical Parameter Measurement System is applied to the assessment of insulator dielectric performance, leads to
It crosses the air suction module and is continually fed into outside air in the test liquid of the test container with certain speed, so that described
Measurement module can quantitatively detect the aerosol electric parameter of air, and measurement data is real-time transmitted to institute by the measurement module
Master control set is stated, the master control set carries out data process&analysis, obtains aerosol measurement of electric parameter as a result, and passing through institute
Manipulation is stated to be shown with display device.
In addition, user can quantitatively extract the operating mode of air by the manipulation with display device setting, it can also basis
It needs to set the time for extracting air and extracts the volume of air.
In this way, aerosol electric parameter is obtained by the aerosol design of Electrical Parameter Measurement System, it is qualitative or even fixed with this
The situation of change of Technologies For The Insulators In Power System insulation performance when the assessment haze weather of amount occurs, to optimize the design of insulator, not only
Structure is simple and convenient to operate, and is suitable for the continuous measurement of aerosol electric parameter and environmental parameter, can be applied to power transformation
It stands, power supply line, pilot scale institute, the units such as the high-tension laboratory of various insulator producers and colleges and universities carry out transmission line insulator shape
State monitoring analysis.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the aerosol design of Electrical Parameter Measurement System of the utility model embodiment one；
Fig. 2 is the structural schematic diagram of the aerosol design of Electrical Parameter Measurement System of the utility model embodiment two；
Fig. 3 is the structural schematic diagram of the aerosol design of Electrical Parameter Measurement System of the utility model embodiment three；
Wherein, the appended drawing reference in Figure of description is as follows:
1, master control set；2, manipulation and display device；3, gas collecting device；31, air suction module；32, flow measurement mould
Block；33, gas storage module；34, irradiation modules；35, gas stone；4, test device；41, test container；42, measurement module；43, warm and humid
Spend measurement module；44, level gauging module；5, wireless communication device.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts
Every other embodiment obtained, fall within the protection scope of the utility model.
Referring to Figure 1, the preferred embodiment in the utility model provides a kind of aerosol design of Electrical Parameter Measurement System, including master control
Device 1 and the gas collecting device 3 being electrically connected respectively with the master control set 1, test device 4, manipulation and display device 2；
The gas collecting device 3 includes air suction module 31, the gas access of the air suction module 31 and air communication, institute
The gas vent for stating air suction module 31 is connected to the gas access of the test device 4, the control terminal of the air suction module 31 with
The pumping control terminal of the master control set 1 is electrically connected；
The test device 4 includes test container 41 and the measurement module 42 for measuring aerosol electric parameter, described
Test liquid is equipped in test container 41, the test side of the measurement module 42 is protruded into the test fluid body, and the test is held
The gas access of device 41 is connected to the gas access of the test device 4, the output end of the measurement module 42 and the master control
First signal input part of device 1 is electrically connected.
In the utility model embodiment, air is acquired by the gas collecting device 3 and is transported to the test dress
It sets in 4, air is passed through in test liquid and tests fluid sample to obtain, and 4 pairs of test liquid of the test device measure simultaneously
The master control set 1 is sent by measurement data and carries out data process&analysis, to obtain aerosol measurement of electric parameter knot
Fruit carrys out line insulation when qualitative or even quantitative assessment haze weather occurs in order to the situation of change of inverse air resistivity
The situation of change of insulating sublayer performance, and then optimize the design of insulator.
In haze weather, the aerosol design of Electrical Parameter Measurement System is applied to the assessment of insulator dielectric performance, leads to
The air suction module 31 is crossed to be continually fed into outside air with certain speed in the test liquid of the test container 41, so that
The measurement module 42 can quantitatively detect the aerosol electric parameter of air, and the measurement module 42 is real-time by measurement data
It is transferred to the master control set 1, the master control set 1 carries out data process&analysis, obtains aerosol measurement of electric parameter knot
Fruit, and shown by the manipulation with display device 2.
In addition, user can quantitatively extract the operating mode of air by the manipulation with the setting of display device 2, it can basis
It needs to set the time for extracting air and extracts the volume of air.
In this way, aerosol electric parameter is obtained by the aerosol design of Electrical Parameter Measurement System, it is qualitative or even fixed with this
The situation of change of Technologies For The Insulators In Power System insulation performance when the assessment haze weather of amount occurs, to optimize the design of insulator, not only
Structure is simple and convenient to operate, and is suitable for the continuous measurement of aerosol electric parameter and environmental parameter, can be applied to power transformation
It stands, power supply line, pilot scale institute, the units such as the high-tension laboratory of various insulator producers and colleges and universities carry out transmission line insulator shape
State monitoring analysis.
In the present embodiment, it should be noted that aerosol, also known as gas glue, smog matter refer to that solid or liquid particle are steady
Surely it is suspended in the dispersion formed in gas medium.And the test liquid uses distilled water or deionized water, utilizes salt
It is dissolved in the principle of water, the salinity in air is dissolved in into deionized water, measurement sample is obtained with this, to help to obtain subject to more
True test result.
It should be understood that the test container 41 uses the containers such as test bottle, and the measurement module 42 includes but unlimited
In conductance instrument, when the aerosol design of Electrical Parameter Measurement System is worked, the conductance instrument has conductance
Rate measuring probe, the conductivity measurement probe protrude into the test fluid body, and the output end of the conductance instrument with
First signal input part of the master control set 1 is electrically connected, and measurement data is real-time transmitted to described by the conductance instrument
Master control set 1, the master control set 1 carry out data process&analysis, obtain aerosol measurement of electric parameter as a result, and passing through institute
Manipulation is stated to be shown with display device 2.
Fig. 2 and Fig. 3 are referred to, in the utility model embodiment, in order to make structure rationalization, in the air suction module 31
Gas access at be equipped with gas stone 35, to buffer pumping airflow, to advantageously ensure that air is continually fed into certain speed
In the test container 41, and then be conducive to improve the reliability of measurement result.
Fig. 2 and Fig. 3 are referred to, in the utility model embodiment, the test device 4 further includes temperature and humidity measurement module
43, the test side of the temperature and humidity measurement module 43 is set in external environment, the output end of the temperature and humidity measurement module 43 with
The second signal input terminal of the master control set 1 is electrically connected.
Wherein, what the temperature and humidity measurement module 43 measured is the temperature and humidity of whole system local environment.The temperature and humidity
The data of the Temperature and Humidity module that measurement module 43 detects can be used for qualitative or even quantitative assessment under identical atmospheric environment, different temperatures
Influence or under humidity, to aerosol electric parameter.
Fig. 2 and Fig. 3 are referred to, in the utility model embodiment, the test device 4 further includes for detecting the survey
The level gauging module 44 of test solution body liquid level in the test container 41, the output end of the level gauging module 44 with it is described
The third signal input part of master control set 1 is electrically connected.
By the level gauging module 44, for detecting the liquid of test liquid liquid level in the test container 41
Position, and send liquid level signal to the master control set 1, the master control set 1 carry out data processing and be sent to the manipulation with
Display device 2, consequently facilitating user is judged in the test container 41 by the manipulation and the display data of display device 2
Level condition, and then liquid level adjustment is carried out according to actual needs.
In the present embodiment, it should be noted that the level gauging module 44 includes but is not limited to outer patch pipeline liquid level
Sensor, the outer patch pipeline liquid level sensor is set to the outer surface of the test container 41, using the outer patch pipeline liquid level
Sensor inner tube is automatic and accurately detects liquid level, and is conducive to avoid the interference to liquid is tested in the test container 41,
To guarantee the accuracy and reliability of measurement result.
Fig. 2 and Fig. 3 are referred to, in the utility model embodiment, the gas collecting device 3 further includes flow measurement mould
Block 32, the test side of the flow measurement module 32 is set to the gas vent for being connected to the air suction module 31 and the test fills
It sets in the conduit between 4 gas access, the fourth signal of the output end of the flow measurement module 32 and the master control set 1
Input terminal electrical connection.
In the present embodiment, the gas vent by the flow measurement module 32 set on the air suction module 31 and the survey
Trial assembly is set in the conduit between 4 gas access, is worked as so that the master control set 1 is detected by the flow measurement module 32
Preceding gas flow.Wherein, the flow measurement module 32 includes but is not limited to flowmeter, and the measurement method of the flowmeter is
Multiple transient measurement, is then averaged, multiplied by the time, to obtain gas flow.
Fig. 2 and Fig. 3 are referred to, in the utility model embodiment, the gas collecting device further includes gas storage module 33,
The gas access of the gas storage module 33 is connected to the gas vent of the air suction module 31, and the gas of the gas storage module 33 goes out
Mouth is connected to the gas access of the test device 4, and the test side of the flow measurement module 32 is set to and is connected to the storage
In conduit between the gas vent of gas module 33 and the gas access of the test device 4.
In the present embodiment, the effect of the gas storage module 33 is smooth air flow, enables the flow measurement module 32
The current gas flow of more accurate measurement.Illustratively, when the flow measurement module 32 is using flowmeter, by institute
The measurement method for stating flowmeter is multiple transient measurement, is then averaged, multiplied by the time, to obtain gas flow.But
It is that, if the instantaneous flow variation of gas is excessive, it will cause the problems that flowmeter measurement error is larger, therefore, using the storage
Gas module 33, is conducive to improve the gentle property of gas in the gas collecting device 3, and can effectively improve measurement result
Reliability.
Fig. 3 is referred to, in the utility model embodiment, the gas collecting device 3 further includes irradiation modules 34, institute
The gas access for stating irradiation modules 34 is connected to the gas vent of the gas storage module 33, the gas vent of the irradiation modules 34
It is connected to the gas access of the test device 4, and the test side of the flow measurement module 32 is set to and is connected to the drying
In conduit between the gas vent of module 34 and the gas access of the test device 4.
In the present embodiment, due to aerosol design of Electrical Parameter Measurement System insulator dielectric suitable for haze weather
The assessment of performance, especially in haze weather, the steam carried in air is more, therefore using described 34 pairs of irradiation modules pumpings
The air entered is dried, and enters in the test liquid of the test container 41 to avoid the steam in air, to guarantee to survey
Measure the reliability of result.
Fig. 3 is referred to, in the utility model embodiment, the aerosol design of Electrical Parameter Measurement System further includes for passing
Wireless communication device 5 of the transmission of data to Internet of Things, the wireless communication of the input terminal of the wireless communication device and the master control set 1
The electrical connection of number output end.
In the present embodiment, after the completion of pumping, the test device 4 detects related data and is transmitted to the master control
Device 1 carries out data processing and display by the manipulation and display device 2, meanwhile, the master control set 1 will treated
Data are sent to Internet of Things by the wireless communication device 5, remotely to obtain data.
In the utility model embodiment, the manipulation and display device 2 include function setting module and data processing with
Display module, the function setting module, the data processing are electrically connected with display module with the master control set 1.
Wherein, the function setting module is used to select the mode of setting pumping volume, and after being provided with, selection is taken out
Gas, then air successively passes through the gas stone 35, the air suction module 31, the gas storage module 33, the flow measurement module 32
With the irradiation modules 34, the test device 4 is finally reached, the measurement of relevant parameter is carried out by the test device 4.
And the data processing and display module include but is not limited to touch screen, the data processing has with display module
The function of data processing and display data, user obtain the information of relevant parameter by the data processing and display module, and
Corresponding function is set by the function setting module, so as to carry out gas molten for the aerosol design of Electrical Parameter Measurement System
The measurement of glue electric parameter.
In the utility model embodiment, the master control set 1 includes liquid level warning module (not shown), the liquid level report
The input terminal of alert module is electrically connected with the third signal input part of the master control set 1, and the liquid level warning module has liquid level
Warning function, it is when the level gauging module 44 detects the liquid level in the test container 41 lower than setting value, then described
Liquid level warning module automatic alarm, so that user adds amount of deionized water.
To sum up, the utility model provides a kind of aerosol design of Electrical Parameter Measurement System, including master control set 1 and respectively with institute
State gas collecting device 3, test device 4, manipulation and the display device 2 of the electrical connection of master control set 1；The gas collecting device 3
Including air suction module 31, the gas access of the air suction module 31 and air communication, the gas vent of the air suction module 31 with
The gas access of the test device 4 is connected to, and the pumping of the control terminal of the air suction module 31 and the master control set 1 controls
End electrical connection；The test device 4 includes test container 41 and the measurement module 42 for measuring aerosol electric parameter, described
Test liquid is equipped in test container 41, the test side of the measurement module 42 is protruded into the test fluid body, and the test is held
The gas access of device 41 is connected to the gas access of the test device 4, the output end of the measurement module 42 and the master control
First signal input part of device 1 is electrically connected.
Compared with the prior art, the utility model has the following beneficial effects:
(1) air is acquired by the gas collecting device 3 and be transported in the test device 4, air is passed through test
Fluid sample is tested to obtain in liquid, 4 pairs of test liquid of the test device measure and send institute for measurement data
It states master control set 1 and carries out data process&analysis, to obtain aerosol measurement of electric parameter as a result, in order to inverse air electricity
The situation of change of resistance rate carrys out the variation feelings of Technologies For The Insulators In Power System insulation performance when qualitative or even quantitative assessment haze weather occurs
Condition, and then optimize the design of insulator.
(2) in haze weather, the aerosol design of Electrical Parameter Measurement System is applied to the assessment of insulator dielectric performance,
Outside air is continually fed into the test liquid of the test container 41 with certain speed by the air suction module 31,
So that the measurement module 42 can quantitatively detect the aerosol electric parameter of air, the measurement module 42 is by measurement data
It is real-time transmitted to the master control set 1, the master control set 1 carries out data process&analysis, obtains the survey of aerosol electric parameter
Amount by the manipulation with display device 2 as a result, and shown.
(3) user can quantitatively extract the operating mode of air by the manipulation with the setting of display device 2, can be according to need
It sets the time for extracting air and extracts the volume of air.
(4) aerosol electric parameter is obtained by the aerosol design of Electrical Parameter Measurement System, it is qualitative or even quantitative with this
Assessment haze weather occur when Technologies For The Insulators In Power System insulation performance situation of change not only tied to optimize the design of insulator
Structure is simple and convenient to operate, and is suitable for the continuous measurement of aerosol electric parameter and environmental parameter, can be applied to power transformation
It stands, power supply line, pilot scale institute, the units such as the high-tension laboratory of various insulator producers and colleges and universities carry out transmission line insulator shape
State monitoring analysis.
(5) test device 4 detects related data and is transmitted to the master control set 1, by the manipulation and shows
Showing device 2 carries out data processing and display, meanwhile, by treated, data pass through wireless communication dress to the master control set 1
It sets 5 and is sent to Internet of Things, remotely to obtain data.
(6) the liquid level warning module has the function of liquid level warning, detects the survey in the level gauging module 44
When trying the liquid level in container 41 and being lower than setting value, then the liquid level warning module automatic alarm, so that user adds deionized water
Amount.
The above is preferred embodiments of the present invention, it is noted that for the ordinary skill of the art
For personnel, without departing from the principle of this utility model, several improvements and modifications can also be made, these are improved and profit
Decorations are also considered as the protection scope of the utility model.
Claims (10)
1. a kind of aerosol design of Electrical Parameter Measurement System, which is characterized in that including master control set and respectively with the master control set
Gas collecting device, test device, manipulation and the display device of electrical connection；
The gas collecting device includes air suction module, the gas access of the air suction module and air communication, the pumping mould
The gas vent of block is connected to the gas access of the test device, the control terminal of the air suction module and the master control set
It is evacuated control terminal electrical connection；
The test device includes test container and the measurement module for measuring aerosol electric parameter, in the test container
Equipped with test liquid, the test side of the measurement module protruded into the test fluid body, the gas access of the test container with
The gas access of the test device is connected to, the first signal input part of the output end of the measurement module and the master control set
Electrical connection.
2. aerosol design of Electrical Parameter Measurement System as described in claim 1, which is characterized in that the test device further includes temperature
Humidity measurement module, the test side of the temperature and humidity measurement module are set in external environment, the temperature and humidity measurement module it is defeated
Outlet is electrically connected with the second signal input terminal of the master control set.
3. aerosol design of Electrical Parameter Measurement System as described in claim 1, which is characterized in that the test device further includes using
In the level gauging module for detecting test liquid liquid level in the test container, the output end of the level gauging module
It is electrically connected with the third signal input part of the master control set.
4. aerosol design of Electrical Parameter Measurement System as claimed in any one of claims 1 to 3, which is characterized in that the gas is adopted
Acquisition means further include flow measurement module, and the test side of the flow measurement module is set to the gas for being connected to the air suction module
In conduit between outlet and the gas access of the test device, the output end of the flow measurement module and the master control are filled
The fourth signal input terminal electrical connection set.
5. aerosol design of Electrical Parameter Measurement System as claimed in claim 4, which is characterized in that the gas collecting device also wraps
Gas storage module is included, the gas access of the gas storage module is connected to the gas vent of the air suction module, the gas storage module
Gas vent is connected to the gas access of the test device, and the test side of the flow measurement module is described set on being connected to
In conduit between the gas vent of gas storage module and the gas access of the test device.
6. aerosol design of Electrical Parameter Measurement System as claimed in claim 5, which is characterized in that the gas collecting device also wraps
Irradiation modules are included, the gas access of the irradiation modules is connected to the gas vent of the gas storage module, the irradiation modules
Gas vent is connected to the gas access of the test device, and the test side of the flow measurement module is described set on being connected to
In conduit between the gas vent of irradiation modules and the gas access of the test device.
7. aerosol design of Electrical Parameter Measurement System as described in claim 1, which is characterized in that the aerosol electric parameter is surveyed
Amount system further includes the wireless communication device for being used for transmission data to Internet of Things, the input terminal of the wireless communication device with it is described
The wireless signal output end of master control set is electrically connected.
8. aerosol design of Electrical Parameter Measurement System as described in claim 1, which is characterized in that the manipulation and display device packet
Include function setting module and data processing and display module, the function setting module, the data processing and display module with
The master control set electrical connection.
9. aerosol design of Electrical Parameter Measurement System as claimed in claim 3, which is characterized in that the master control set includes liquid level
Alarm module, the input terminal of the liquid level warning module are electrically connected with the third signal input part of the master control set.
10. aerosol design of Electrical Parameter Measurement System as described in claim 1, which is characterized in that the measurement module is conductance
Rate measuring instrument, the conductance instrument have conductivity measurement probe, and the conductivity measurement probe protrudes into the test fluid
In vivo, and the output end of the conductance instrument is electrically connected with the first signal input part of the master control set.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108398624A (en) * | 2018-05-11 | 2018-08-14 | 广州广华智电科技有限公司 | A kind of aerosol design of Electrical Parameter Measurement System |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108398624A (en) * | 2018-05-11 | 2018-08-14 | 广州广华智电科技有限公司 | A kind of aerosol design of Electrical Parameter Measurement System |
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