CN105527504B - A kind of space charge density measuring system - Google Patents
A kind of space charge density measuring system Download PDFInfo
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- CN105527504B CN105527504B CN201510867982.9A CN201510867982A CN105527504B CN 105527504 B CN105527504 B CN 105527504B CN 201510867982 A CN201510867982 A CN 201510867982A CN 105527504 B CN105527504 B CN 105527504B
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- polar plate
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- flowmeter
- space charge
- internal polar
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- 238000012545 processing Methods 0.000 claims abstract description 34
- 230000005540 biological transmission Effects 0.000 claims abstract description 19
- 238000005259 measurement Methods 0.000 claims abstract description 16
- 238000001514 detection method Methods 0.000 claims description 30
- 238000002955 isolation Methods 0.000 claims description 12
- 230000005611 electricity Effects 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000009413 insulation Methods 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- -1 polytetrafluoroethylene Polymers 0.000 claims description 2
- 230000008054 signal transmission Effects 0.000 claims description 2
- 230000005684 electric field Effects 0.000 abstract description 8
- 239000002245 particle Substances 0.000 abstract description 6
- 238000004458 analytical method Methods 0.000 abstract description 4
- 238000011160 research Methods 0.000 abstract description 2
- 150000002500 ions Chemical class 0.000 description 29
- 238000000034 method Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-M Formate Chemical compound [O-]C=O BDAGIHXWWSANSR-UHFFFAOYSA-M 0.000 description 1
- 238000010227 cup method (microbiological evaluation) Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001739 density measurement Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 208000002173 dizziness Diseases 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical compound FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
Classifications
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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)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The present invention provides a kind of space charge density measuring system, and the measuring system includes measuring unit, wireless transmission unit and processing unit；The measuring unit is communicated with processing unit by wireless transmission unit.The measuring unit includes mechanical structure and electrical structure, and the electrical structure is set on the circuit board of mechanical structure.The present invention provides a kind of space charge density measuring system, realizes automatic measurement, display, storage and the analysis of direct current transportation environment Space-charge density, improves the degree of automation and measurement efficiency of measurement.Measuring system provided by the invention is removable, and measurement while can realize different location, the space charge density that this mode measurement obtains are conducive to the analysis to data；The particle mobility range of measurement is wide, and charged particle can be divided into different mobility ranges while being measured, the research for being conducive to the charging characteristic of the weather conditions down space particle such as haze and its influencing on total electric field.
Description
Technical field
The present invention relates to a kind of measuring systems, and in particular to a kind of space charge density measuring system.
Background technique
Total electric field under DC power transmission line and in converter station is an important parameter of direct current transportation electromagnetic environment, electricity
The a part of the electric field that the dizzy ion generated is formed as formate field intensity, the influence to synthesis field intensity value are very big.To study China
Relationship between space charge density under particular surroundings and ground total electric field needs to carry out the charge density of spatial distribution
Measurement.
Method currently used for determining charge density mainly has ion counter method, charge screening method, faraday cup method etc.,
The principle of ion counter method are as follows: when the making alive between the two-plate for constituting sensor, electric field is just formed between pole plate, in electric field
Under the action of power, ion, electronics will be moved to corresponding pole plate, measure the electric current of its formation, when by integrating one section available
The interior charge number by ion counter, measures flow using flowmeter, can be obtained in a period of time by integral
The gas volume of ion counter is flowed through, to obtain space charge density by the ratio between charge number and gas volume.
Existing molding instrument is measured mainly for the negative ion density in air, is seldom related to the sky of direct current transportation
Between determining charge density.
Summary of the invention
In order to overcome the above-mentioned deficiencies of the prior art, the present invention provides a kind of space charge density measuring system, realizes
Automatic measurement, display, storage and the analysis of direct current transportation environment Space-charge density, improve the degree of automation of measurement
And measurement efficiency.
In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical scheme that:
The present invention provides a kind of space charge density measuring system, and the measuring system includes measuring unit, wireless transmission
Unit and processing unit；The measuring unit is communicated with processing unit by wireless transmission unit.
The measuring unit includes mechanical structure and electrical structure, and the electrical structure is set to the circuit board of mechanical structure
On.
The mechanical structure includes ion counter sensor, shielding case, insulating layer, flowmeter, fan, signal transmission screen
Cover line, electric panel room, circuit board, supplying cell, mounting base.
The circuit board and supplying cell are located inside electric panel room, the ion counter sensor, flowmeter, fan and
Electric panel room is respectively positioned on inside insulating layer, and the shielding case is located at outside insulating layer, the mounting base be located at shielding case bottom and with
Shielding case is integrated；
The ion counter sensor, flowmeter and fan are sequentially arranged from top to bottom in the side in insulating layer, institute
State the other side that electric panel room is arranged in insulating layer；
The ion counter sensor transmits shielding line by signal and connect with circuit board.
Space charge is converted to current signal for obtaining space charge by the ion counter sensor；It is described
Shielding case is passed for shielding outside electromagnetic interference, the insulating layer for the ion counter inside insulation shielding shell and insulating layer
Sensor, flowmeter, fan and electric panel room；The flowmeter is used to measure the gas flow by ion counter sensor, institute
Fan is stated for gas to be sucked ion counter sensor；The electric panel room is used for mounting circuit boards and supplying cell, described
For circuit board for the processing of gas flow and space charge and the transmission of space charge density, the supplying cell is the measurement
System power supply.
The flowmeter includes flowmeter A and flowmeter B；
The flowmeter A and flowmeter B are separately positioned on insulating layer and electric panel room, and are symmetrical arranged；
Flowmeter A and flowmeter B are all made of thermal flowmeter；
The fan uses aerofoil fan.
The ion counter sensor includes external polar plate, the first internal polar plate, the second internal polar plate and third internal polar plate；
The external polar plate, the first internal polar plate, the second internal polar plate and third internal polar plate are coaxial, and are cylinder；
The external polar plate is fixed on the insulating layer, first internal polar plate, the second internal polar plate and third internal polar plate from up to
Under set gradually, and pass through polytetrafluoroethylene (PTFE) between first internal polar plate, the second internal polar plate, third internal polar plate and external polar plate
Material carries out insulating supporting.
The electrical structure includes signal processing circuit, isolation circuit, control circuit, detection circuit and protection circuit；
The signal processing circuit includes current-voltage conversion circuit, voltage amplifier circuit and filter circuit.
The current signal being converted to by ion counter sensor is converted to electricity by the current-voltage conversion circuit
Signal is pressed, which is amplified respectively, is filtered by the voltage amplifier circuit, filter circuit, by amplifying,
Voltage signal after filtering processing is sent to control circuit by isolation circuit, and control circuit will be after amplifying, being filtered
Voltage signal be converted to digital signal, then the digital signal is converted to space charge density, which passes through
Wireless transmission unit is transferred to processing unit.
The detection circuit includes the first detection circuit, the second detection circuit and third detection circuit；
First detection circuit detects gas flow rate, obtains passing by ion counter by the flowmeter
The gas flow of sensor；
Second detection circuit is between voltage, the second internal polar plate and the external polar plate between the first internal polar plate and external polar plate
Voltage and third internal polar plate and external polar plate between voltage detected respectively；
The third detection circuit detects the electricity of supplying cell, alarms when supplying cell not enough power supply
Prompt；
The protection circuit protects signal processing circuit, isolation circuit, control circuit and detection circuit, prevents outer
The electromagnetic interference of boundary's bad electromagnetic environment damages signal processing circuit, isolation circuit, control circuit and detection circuit.
The processing unit uses digital signal processor or industrial control computer, and processing unit receives wireless transmission unit and passes
After defeated space charge density, space charge density is shown, analyzed and is stored.
Compared with the immediate prior art, technical solution provided by the invention is had the advantages that
1, measuring system is made to be more suitable for direct current transportation this special strong electrical field, high-intensity magnetic field by the way that protection circuit etc. is added
Application environment；
2, measuring system provided by the invention may be implemented the automatic measurement of direct current transportation environment space charge density, show
Show, store and analyze, improves the degree of automation and measurement efficiency of measurement；
3, measuring system provided by the invention is removable, and measurement while can realize different location, this mode measure
Obtained space charge density is conducive to the analysis to data；
4, the particle mobility range measured is wide, and charged particle can be divided into different mobility ranges while being surveyed
Amount, the research for being conducive to the charging characteristic of the weather conditions down space particle such as haze and its total electric field being influenced.
Detailed description of the invention
Fig. 1 is the distributed frame schematic diagram of Space-charge density measurement system of the embodiment of the present invention；
Fig. 2 is measuring device mechanical structure sectional view of the present invention；
In figure, 1- external polar plate, the first internal polar plate of 2-, the second internal polar plate of 3-, 4- third internal polar plate, 5- shielding case, 6- insulation
Layer, 7- flowmeter, 8- fan, 9- electric panel room, 10- circuit board, 11- supplying cell, 12- mounting base.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings.
The present invention provides a kind of space charge density measuring system, and the measuring system includes measuring unit, wireless transmission
Unit and processing unit；The measuring unit is communicated with processing unit by wireless transmission unit.
The measuring unit includes mechanical structure and electrical structure, and the electrical structure is set to the circuit board of mechanical structure
On 10.
The mechanical structure includes ion counter sensor, shielding case 5, insulating layer 6, flowmeter 7, fan 8, signal biography
Defeated shielding line, electric panel room 9, circuit board 10, supplying cell 11, mounting base 12.
The circuit board 10 and supplying cell 11 are located inside electric panel room 9, the ion counter sensor, flowmeter 7,
Fan 8 and electric panel room 9 are respectively positioned on inside insulating layer 6, and the shielding case 5 is located at outside insulating layer 6, and the mounting base 12 is located at screen
It covers 5 bottom of shell and is integrated with shielding case 5；
The ion counter sensor, flowmeter 7 and fan 8 are sequentially arranged from top to bottom in the side in insulating layer 6,
The electric panel room 9 is arranged in the other side in insulating layer 6；
The ion counter sensor transmits shielding line by signal and connect with circuit board 10.
Space charge is converted to current signal for obtaining space charge by the ion counter sensor；It is described
Shielding case 5 is for shielding outside electromagnetic interference, and the insulating layer 6 is for the Ion Counting inside insulation shielding shell 5 and insulating layer 6
Device sensor, flowmeter 7, fan 8 and electric panel room 9；The flowmeter 7 is used to measure the gas by ion counter sensor
Flow, the fan 8 are used to gas sucking ion counter sensor；The electric panel room 9 is for mounting circuit boards 10 and supplies
Battery 11, the circuit board 10 is for the processing of gas flow and space charge and the transmission of space charge density, the confession
Battery 11 is measuring system power supply.
The flowmeter 7 includes flowmeter A and flowmeter B；
The flowmeter A and flowmeter B are separately positioned on insulating layer 6 and electric panel room 9, and are symmetrical arranged；
Flowmeter A and flowmeter B are all made of thermal flowmeter；
The fan 8 uses aerofoil fan.
The ion counter sensor includes external polar plate 1, the first internal polar plate 2, the second internal polar plate 3 and third internal polar plate 4；
The external polar plate 1, the first internal polar plate 2, the second internal polar plate 3 and third internal polar plate 4 are coaxial, and are cylinder；
The external polar plate 1 is fixed on insulating layer 6, first internal polar plate 2, the second internal polar plate 3 and third internal polar plate 4 from
It is set gradually under, and by poly- between first internal polar plate 2, the second internal polar plate 3, third internal polar plate 4 and external polar plate 1
Tetrafluoroethene material carries out insulating supporting.
The electrical structure includes signal processing circuit, isolation circuit, control circuit, detection circuit and protection circuit；
The signal processing circuit includes current-voltage conversion circuit, voltage amplifier circuit and filter circuit.
The current signal being converted to by ion counter sensor is converted to electricity by the current-voltage conversion circuit
Signal is pressed, which is amplified respectively, is filtered by the voltage amplifier circuit, filter circuit, by amplifying,
Voltage signal after filtering processing is sent to control circuit by isolation circuit, and control circuit will be after amplifying, being filtered
Voltage signal be converted to digital signal, then the digital signal is converted to space charge density, which passes through
Wireless transmission unit is transferred to processing unit.
The detection circuit includes the first detection circuit, the second detection circuit and third detection circuit；
First detection circuit detects gas flow rate, is obtained by the flowmeter 7 by ion counter
The gas flow of sensor；
Second detection circuit is to voltage, the second internal polar plate 3 and the external polar plate 1 between the first internal polar plate 2 and external polar plate 1
Between voltage and third internal polar plate 4 and external polar plate 1 between voltage detected respectively；
The third detection circuit detects the electricity of supplying cell 11, carries out when 11 not enough power supply of supplying cell
Warning note；
The protection circuit protects signal processing circuit, isolation circuit, control circuit and detection circuit, prevents outer
The electromagnetic interference of boundary's bad electromagnetic environment damages signal processing circuit, isolation circuit, control circuit and detection circuit.
The processing unit uses digital signal processor or industrial control computer, and processing unit receives wireless transmission unit and passes
After defeated space charge density, space charge density is shown, analyzed and is stored.
Finally it should be noted that: the above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, institute
The those of ordinary skill in category field can still modify to a specific embodiment of the invention referring to above-described embodiment or
Equivalent replacement, these are applying for this pending hair without departing from any modification of spirit and scope of the invention or equivalent replacement
Within bright claims.
Claims (1)
1. a kind of space charge density measuring system, it is characterised in that: the measuring system includes measuring unit, wireless transmission list
Member and processing unit；The measuring unit is communicated with processing unit by wireless transmission unit；
The measuring unit includes mechanical structure and electrical structure, and the electrical structure is set on the circuit board of mechanical structure；
The mechanical structure includes ion counter sensor, shielding case, insulating layer, flowmeter, fan, signal transmission shielding
Line, electric panel room, circuit board, supplying cell, mounting base；
The circuit board and supplying cell are located inside electric panel room, the ion counter sensor, flowmeter, fan and electrical
Room is respectively positioned on inside insulating layer, and the shielding case is located at outside insulating layer, the mounting base be located at shielding case bottom and with shielding
Shell is integrated；
The ion counter sensor, flowmeter and fan are sequentially arranged from top to bottom in the side in insulating layer, the electricity
Gas chamber is arranged in the other side in insulating layer；
The ion counter sensor transmits shielding line by signal and connect with circuit board；
Space charge is converted to current signal for obtaining space charge by the ion counter sensor；The shielding
Shell is sensed for shielding outside electromagnetic interference, the insulating layer for the ion counter inside insulation shielding shell and insulating layer
Device, flowmeter, fan and electric panel room；The flowmeter is used to measure the gas flow by ion counter sensor, described
Fan is used to gas sucking ion counter sensor；The electric panel room is used for mounting circuit boards and supplying cell, the electricity
For road plate for the processing of gas flow and space charge and the transmission of space charge density, the supplying cell is measurement system
System power supply；
The flowmeter includes flowmeter A and flowmeter B；
The flowmeter A and flowmeter B are separately positioned on insulating layer and electric panel room, and are symmetrical arranged；
Flowmeter A and flowmeter B are all made of thermal flowmeter；
The fan uses aerofoil fan；
The ion counter sensor includes external polar plate, the first internal polar plate, the second internal polar plate and third internal polar plate；
The external polar plate, the first internal polar plate, the second internal polar plate and third internal polar plate are coaxial, and are cylinder；
The external polar plate is fixed on the insulating layer, first internal polar plate, the second internal polar plate and third internal polar plate from top to bottom according to
Secondary setting, and pass through polytetrafluoroethylene material between first internal polar plate, the second internal polar plate, third internal polar plate and external polar plate
Carry out insulating supporting；
The electrical structure includes signal processing circuit, isolation circuit, control circuit, detection circuit and protection circuit；
The signal processing circuit includes current-voltage conversion circuit, voltage amplifier circuit and filter circuit；
The current signal being converted to by ion counter sensor is converted to voltage letter by the current-voltage conversion circuit
Number, which is amplified respectively, is filtered by the voltage amplifier circuit, filter circuit, by amplifying, filtering
Treated voltage signal is sent to control circuit by isolation circuit, and control circuit is by the electricity after amplifying, being filtered
Pressure signal is converted to digital signal, then the digital signal is converted to space charge density, which passes through wireless
Transmission unit is transferred to processing unit；
The detection circuit includes the first detection circuit, the second detection circuit and third detection circuit；
First detection circuit detects gas flow rate, is obtained by the flowmeter by ion counter sensor
Gas flow；
Second detection circuit is to the electricity between voltage, the second internal polar plate and the external polar plate between the first internal polar plate and external polar plate
Pressure and the voltage between third internal polar plate and external polar plate are detected respectively；
The third detection circuit detects the electricity of supplying cell, and alarm is carried out when supplying cell not enough power supply and is mentioned
Show；
The protection circuit protects signal processing circuit, isolation circuit, control circuit and detection circuit, prevents extraneous evil
The electromagnetic interference of bad electromagnetic environment damages signal processing circuit, isolation circuit, control circuit and detection circuit；
The processing unit uses digital signal processor or industrial control computer, and processing unit receives wireless transmission unit transmission
After space charge density, space charge density is shown, analyzed and is stored.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510867982.9A CN105527504B (en) | 2015-12-02 | 2015-12-02 | A kind of space charge density measuring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510867982.9A CN105527504B (en) | 2015-12-02 | 2015-12-02 | A kind of space charge density measuring system |
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| Publication Number | Publication Date |
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| CN105527504A CN105527504A (en) | 2016-04-27 |
| CN105527504B true CN105527504B (en) | 2019-03-05 |
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| CN201510867982.9A Active CN105527504B (en) | 2015-12-02 | 2015-12-02 | A kind of space charge density measuring system |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106443217B (en) * | 2016-09-13 | 2020-10-09 | 中国电力科学研究院 | Space charge density measuring device |
| CN107589316B (en) * | 2017-08-25 | 2019-12-20 | 中国科学院近代物理研究所 | Charge measurement circuit |
| CN109782080B (en) * | 2019-01-08 | 2021-03-19 | 国网天津市电力公司电力科学研究院 | Cable insulation space charge signal wireless transmission system |
| CN113358943B (en) * | 2021-04-30 | 2023-03-14 | 上海工程技术大学 | Oil flow electrification measuring device and full-section charge measuring method |
| CN113418824B (en) * | 2021-05-07 | 2023-02-10 | 华东理工大学 | Method for testing gas adsorption capacity |
| CN113533870B (en) * | 2021-06-23 | 2024-03-22 | 国网山东省电力公司青岛供电公司 | Prediction method and system for correcting space charge density in corona cage by considering environmental factors |
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