CN107247196A - A kind of multi purpose space charge-measuring system and measuring method - Google Patents
A kind of multi purpose space charge-measuring system and measuring method Download PDFInfo
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- CN107247196A CN107247196A CN201710552011.4A CN201710552011A CN107247196A CN 107247196 A CN107247196 A CN 107247196A CN 201710552011 A CN201710552011 A CN 201710552011A CN 107247196 A CN107247196 A CN 107247196A
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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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- 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
- G01R29/12—Measuring electrostatic fields or voltage-potential
- G01R29/14—Measuring field distribution
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
A kind of multi purpose space charge-measuring system and measuring method, the measuring system includes measurement Top electrode, measure bottom electrode, the pulse generating unit being connected with measurement Top electrode pulse incoming end, the DC high-voltage source being connected with measurement Top electrode high pressure incoming end, sample is arranged between measurement Top electrode and measurement bottom electrode；Measuring bottom electrode includes metal shell, it is arranged on the bottom electrode upper cover plate contacted at the top of metal shell and with sample lower surface, it is arranged on the thin film sensor being close in metal shell and with bottom electrode upper cover plate lower surface, the metal shielding covered on outside thin film sensor, the low-noise amplifier being connected with thin film sensor, the panel connector on metal shell is embedded in, low-noise amplifier is connected with panel connector；The oscillograph being connected by integrating circuit matched line with panel connector；The invention also discloses measuring method；The present invention not only has Conventional spatial charge measurement function, and the plate tensile sample electric charge injection being also equipped with simulation space vacuum high energy electron environment to different-thickness and dissipation law and electric charge, Electric Field Distribution carry out the function of on-line measurement.
Description
Technical field
The invention belongs to carry out space charge distribution measurement techniques field in dielectric material using pulse electroacoustic method, and in particular to one
Plant multi purpose space charge-measuring system and measuring method.
Background technology
Dielectric directly influences equipment as electric, electronic device key components, its electric, ageing properties
Reliability of operation and life-span.Research shows that space charge is a key factor for causing electrostrictive polymer aging, the sky of material
Between distribution of charges can intuitively reflect electrostrictive polymer degree of aging, mechanism collapse, trap density and its distribution.Space environment is to causing
Its device reliability effect most serious be various energy electronics, electronics is gathered in inside dielectric material or surface can all form height
Electrostatic potential, and trigger the pulsed discharge for having a strong impact on electronic system normal work, electronic device is directly resulted in when serious and is punctured
Or burn.Distribution of space charge of the dielectric material under high-energy electron irradiation is studied, the operational reliability for ensureing spacecraft
It is significant with the life-span.
By 20 years developments, pulse electroacoustic method (PEA) has been widely used in studying hollow electricity of solid dielectric insulation
Lotus is distributed.But the general measure space charge system based on pulse electroacoustic method cannot be used for space environmental simulation and carry out electron beam
Space charge on-line measurement in the case of irradiation, and applicable size of sample scope is extremely narrow, only below 0.5mm thickness.
The content of the invention
In order to overcome the shortcomings of that above-mentioned prior art is present, it is an object of the invention to provide a kind of multi purpose space electric charge
Measuring system and measuring method, the system not only have Conventional spatial charge measurement function, and measurement range is extended into 5mm
And following thick sample, and possess the board-like material sample electric charge under simulation space vacuum high energy electron environment to different-thickness
Injection and dissipation law and electric charge, Electric Field Distribution carry out the function of on-line measurement.
To reach above-mentioned purpose, the present invention uses following technical scheme：
A kind of multi purpose space charge-measuring system, including measurement Top electrode 1, measure bottom electrode 12, with measurement Top electrode 1
The pulse generating unit 2 of the adjustable pulse parameter of pulse incoming end connection, the direct current being connected with the measurement high pressure incoming end of Top electrode 1
High-voltage power supply 3, sample is arranged between measurement Top electrode 1 and measurement bottom electrode 12；The measurement bottom electrode 12 includes metal shell 8,
Be arranged on the top of metal shell 8 and the bottom electrode upper cover plate 4 contact with the lower surface of sample, be arranged on metal shell 8 it is interior and with
What the lower surface of bottom electrode upper cover plate 4 was close to changes the thin film sensor 5 of thickness, the metal screen covered on outside thin film sensor 5
Shell 6 is covered, the low-noise amplifier 7 being connected with thin film sensor 5 is embedded in the panel connector 9 on metal shell 8, panel connector 9
In have signal transmission mouth and a plant-grid connection mouthful, be respectively used to spread out of signal that low-noise amplifier 7 amplifies and to low
Noise amplifier 7 is powered, and low-noise amplifier 7 is connected with panel connector 9；The product being connected with the signal transmission mouth of panel connector 9
Parallel circuit matched line 10, is connected to the oscillograph 11 of the other end of integrating circuit matched line 10.
The measurement Top electrode 1 is the autonomous patent of invention (patent No. of applicant：The 0359855.X of ZL 2,011 1) in electricity
Pole.
The pulse generating unit 2 can adjust the amplitude and pulsewidth of input pulse signal according to sample thickness, while thin
Film sensors 5 are by adjusting the thickness of film to adapt to the measurement of different-thickness sample so that whole measuring system is realized to not
The plate tensile sample material of stack pile is measured；The pulse amplitude adjustable extent of the pulse generating unit 2 is 0~3600V, arteries and veins
Wide adjustable range is 5ns~150ns；The film thickness adjustable range of thin film sensor 5 is 5 μm~100 μm；Measurable examination
Sample thickness range is 0.1mm~5mm.
The system under normal atmospheric environment external dc high pressure carry out general measure, applications voltage range for 1kV~
50kV；The distribution of space charge situation of sample can also be measured in real time under electron irradiation environment simultaneously, electron energy scope is
10keV~10MeV, and the system can carry out experiment measurement in the case of vertical radiation and horizontal radiation.
The measurement Top electrode 1 is fixedly connected with measurement bottom electrode 12 by screw rod with nut.
The integrating circuit matched line 10 is mainly made up of electric capacity and resistance, the distortion for eliminating waveform.
The measuring method of multi purpose space charge-measuring system described above, using pulse radio-acoustic method as general principle,
When applying high direct voltage progress general measure under normal atmospheric environment, the source of measurement electric charge is the DC high-voltage source 3 of pressure；Root
The selection of pulse parameter and sensor thickness is carried out according to the thickness of measurement sample；The pressure of DC high-voltage source 3 causes quilt in sample
The electric charge of certain polarity is injected, the pulse that pulse generating unit 2 is applied can produce phase when by sample internal charge position
Answer the ping ripple of polarity；Ping ripple is received and turned by thin film sensor 5 after being transferred through sample and bottom electrode upper cover plate 4
It is changed into electric signal, the electric signal waveform exported afterwards amplifies by low-noise amplifier 7, and integrated Circuit Matching line 10 is carried out
Waveform modification, is finally received by oscillograph 11, is afterwards demarcated obtained waveform and denoising to signal data, finally
Obtain the distribution of charges and electric-field intensity distribution of sample；
The charge collection principle of sample under electron irradiation environment is directly injected into for electronics, should under electron irradiation environment
The measurement of system need not access DC voltage, so not needing DC high-voltage source 3, electricity is directly received using Top electrode 1 is measured
Son injection, electrons stay directly forms space charge, the pulse excitation then sent using pulse generating unit 2 inside sample
Go out the acoustic signals related to electric charge, acoustic signals are transmitted with sample and bottom electrode upper cover plate 4 for medium, by film-sensing
Device 5 receives and is converted into corresponding electric signal；Subsequent electric signal amplifies by low-noise amplifier 7, then integrated circuit
Distribution 10 carries out waveform modification, is finally obtained by oscillograph 11, obtained waveform is demarcated and gone to signal data afterwards
Make an uproar processing, the final distribution of charges and electric-field intensity distribution for obtaining sample
Compared to the prior art the present invention, has the following advantages that：
1st, advantage of the multi purpose space charge-measuring system of the present invention compared with common space charge measuring system be such as
Under：(1) system can apply high direct voltage progress general measure under normal atmospheric environment；(2) measurement sample thickness by
0.1mm once extends to 5mm；(3) can in the environment of electron irradiation on-line measurement space charge.The tune of impressed DC voltage
Adjusting range is 1kV~50kV, and the excursion of electron radiation energy energy is 10keV~10MeV.
2nd, pulse generating unit 2 can continuously adjust the amplitude and pulsewidth of input pulse signal according to institute's test specimens thickness,
Thin film sensor 5 can adjust the thickness of sensor according to institute test specimens thickness, with needed for obtaining the different plate tensile samples of measurement
Measurement sensitivity and resolution ratio.Pulse amplitude continuous tuning range be 0~3600V, pulsewidth continuously adjust scope for 5ns~
150ns；Piezoelectric transducer thickness adjustable range is 5 μm~100 μm；Measurable sample thickness scope is 0.1mm~5mm.
3rd, the measuring electrode of the measuring system is fixed using the direction being mechanically fixed, and can meet positive or lateral
The requirement of experiment of measurement, applicability is more extensive.
4th, it is measurement Top electrode 1 to employ the electrode in the 0359855.X of Patent No. ZL 2,011 1, can be monitored in real time
Electric charge injection and the dissipation law of sample are observed, is provided conveniently for the on-line measurement in situ of material space electric charge.The electrode exists
Without applying high direct voltage during progress high-energy electron irradiation measurement.It is height to extend through the through hole of Top electrode bottom surface by upper electrode surface
Can electron injection to plate tensile sample passage.
5th, whole measuring system includes the insulating materials and overcoat in upper/lower electrode and line, using radiation resistant polymer
Material, can not only protect this measuring system, and will not be because organic material deaerates and influences measurement.
Brief description of the drawings
Fig. 1 is the connection diagram of multi purpose space charge-measuring system of the present invention.
Fig. 2 is the measurement result schematic diagram of multi purpose space charge-measuring system of the present invention, wherein：Fig. 2 (a) is general big
General measure design sketch under compression ring border, Fig. 2 (b) is the measurement effect figure under electron irradiation environment.
Embodiment
Operation principle of the present invention is described in more detail below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of multi purpose space charge-measuring system of the invention, including measurement Top electrode 1, measure bottom electrode
12, the pulse generating unit 2 for the adjustable pulse parameter being connected with the measurement pulse incoming end of Top electrode 1, with the measurement high pressure of Top electrode 1
The DC high-voltage source 3 of incoming end connection, sample is arranged between measurement Top electrode 1 and measurement bottom electrode 12；The measurement bottom electrode
12 include metal shell 8, are arranged on the top of metal shell 8 and the bottom electrode upper cover plate 4 contacted with the lower surface of sample, are arranged on
The thin film sensor 5 for changing thickness being close in metal shell 8 and with the lower surface of bottom electrode upper cover plate 4, covers on film-sensing
Metal shielding 6 outside device 5, the low-noise amplifier 7 being connected with thin film sensor 5, is embedded in the panel on metal shell 8
There are a signal transmission mouth and a plant-grid connection mouthful in joint 9, panel connector 9, be respectively used to outflow low-noise amplifier 7 and put
Big signal and powered to low-noise amplifier 7, low-noise amplifier 7 is connected with panel connector 9；With the signal of panel connector 9
The integrating circuit matched line 10 of mouth connection is transmitted, the oscillograph 11 of the other end of integrating circuit matched line 10 is connected to.
A kind of measuring method of multi purpose space charge-measuring system of the present invention is：Substantially original is used as using pulse radio-acoustic method
Reason, when applying high direct voltage progress general measure under normal atmospheric environment, measures high direct voltage of the source of electric charge for pressure
Source 3.The selection of pulse parameter and sensor thickness is carried out according to the thickness of measurement sample.The pressure of DC high-voltage source 3 causes examination
The electric charge of certain polarity is injected into sample, the pulse that clock 2 is applied can produce phase when by sample internal charge position
Answer the ping ripple of polarity.Ping ripple is received and turned by thin film sensor 5 after being transferred through sample and bottom electrode upper cover plate 4
It is changed into electric signal, the electric signal waveform exported afterwards amplifies by low-noise amplifier 7, and integrated Circuit Matching line 10 is carried out
Waveform modification, is finally received by oscillograph 11, is afterwards demarcated obtained waveform and denoising to signal data, finally
Obtain the distribution of charges and electric-field intensity distribution of sample.Fig. 2 (a) in general measure effect such as Fig. 2 under normal atmospheric environment
It is shown, as can be seen from the figure：The interface charge peak at waveform two ends is one positive one negative heterocharge peak.Due to can basis
The situation adjustment pulse of sample and the parameter of sensor, it is ensured that the sensitivity of measurement, so the feature at electric charge peak is bright in waveform
It is aobvious, and there is no in the presence of Circuit Matching line serious waveform " overshoot " phenomenon occur.
The charge collection principle of sample under electron irradiation environment is directly injected into for electronics, should under electron irradiation environment
The measurement of system need not access DC voltage, so not needing DC high-voltage source 3, upper electricity is measured using the patent independently invented
Pole 1 directly receives electron injection, and electrons stay directly forms space charge in material internal, then utilizes pulse generating unit 2
The pulse excitation sent goes out the acoustic signals related to electric charge, and acoustic signals are carried out with sample and bottom electrode upper cover plate 4 for medium
Transmission, is received by thin film sensor 5 and is converted into corresponding electric signal.Subsequent electric signal amplifies by low-noise amplifier 7, so
Waveform modification is carried out by integrating circuit matched line 10, is finally obtained by oscillograph 11, afterwards by obtained waveform to signal number
According to being demarcated and denoising, the final distribution of charges and electric-field intensity distribution for obtaining sample.Figure in measurement effect such as Fig. 2
Shown in 2 (b), the figure is the waveform that on-line measurement is obtained under horizontal radiation environment, as can be seen from the figure：With normal atmospheric environment
Lower traditional measurements are different, and the interface charge peak at the waveform two ends that on-line measurement is obtained is the positive charge peak of same polarity.Sample
In the corresponding negative electrical charge peak of space charge that is produced because of electron irradiation it is fairly obvious, this is to have selected suitable pulse and thin
The result of film sensors parameter.
The principle and embodiment of the present invention are set forth invention applies specific embodiment, above example
Illustrate the method and its core concept for being only intended to help to understand the present invention；Simultaneously for those of ordinary skill in the art, according to
According to the thought of the present invention, corresponding variation is done in specific embodiments and applications, protection scope of the present invention is belonged to.
Claims (6)
1. a kind of multi purpose space charge-measuring system, it is characterised in that：Including measurement Top electrode (1), bottom electrode (12) is measured,
The pulse generating unit (2) for the adjustable pulse parameter being connected with measurement Top electrode (1) pulse incoming end, with measurement Top electrode (1)
The DC high-voltage source (3) of high pressure incoming end connection, sample is arranged between measurement Top electrode (1) and measurement bottom electrode (12)；It is described
Measuring bottom electrode (12) includes metal shell (8), is arranged on the lower electricity contacted at the top of metal shell (8) and with the lower surface of sample
Pole upper cover plate (4), be arranged in metal shell (8) and with bottom electrode upper cover plate (4) lower surface is close to changes the thin of thickness
Film sensors (5), cover on the outside metal shielding (6) of thin film sensor (5), the low noise being connected with thin film sensor (5)
Amplifier (7), being embedded in the panel connector (9) on metal shell (8), panel connector (9) has a signal transmission mouth and one
Individual plant-grid connection mouthful, is respectively used to spread out of the signal of low-noise amplifier (7) amplification and gives low-noise amplifier (7) power supply, low
Noise amplifier (7) is connected with panel connector (9)；The integrating circuit matched line being connected with the signal transmission mouth of panel connector (9)
(10), it is connected to the oscillograph (11) of integrating circuit matched line (10) other end.
2. multi purpose space charge-measuring system according to claim 1, it is characterised in that：The pulse generating unit
(2) amplitude and pulsewidth of input pulse signal can be adjusted according to sample thickness, while thin film sensor (5) is by adjusting film
Thickness to adapt to the measurement of different-thickness sample so that whole measuring system is realized to be entered to the plate tensile sample material of different-thickness
Row measurement；The pulse amplitude adjustable extent of the pulse generating unit (2) is 0~3600V, the adjustable range of pulsewidth for 5ns~
150ns；The film thickness adjustable range of thin film sensor (5) is 5 μm~100 μm；Measurable sample thickness scope is 0.1mm
~5mm.
3. multi purpose space charge-measuring system according to claim 1, it is characterised in that：The system is in general atmosphere ring
External dc high pressure carries out general measure under border, and application voltage range is 1kV~50kV；Simultaneously also can be in electron irradiation environment
The distribution of space charge situation of the lower sample of measurement in real time, electron energy scope is 10keV~10MeV, and the system is in vertical spoke
Penetrate and horizontal radiation in the case of can all carry out experiment measurement.
4. multi purpose space charge-measuring system according to claim 1, it is characterised in that：The measurement Top electrode (1)
It is fixedly connected with measurement bottom electrode (12) by screw rod with nut.
5. multi purpose space charge-measuring system according to claim 1, it is characterised in that：The integrating circuit matched line
(10) mainly it is made up of electric capacity and resistance, the distortion for eliminating waveform.
6. the measuring method of multi purpose space charge-measuring system described in claim 1, it is characterised in that：Made with pulse radio-acoustic method
For general principle, when applying high direct voltage progress general measure under normal atmospheric environment, the source of measurement electric charge is pressure
DC high-voltage source (3)；The selection of pulse parameter and sensor thickness is carried out according to the thickness of measurement sample；DC high-voltage source (3)
Pressure to be injected into the electric charge of certain polarity in sample, the pulse that pulse generating unit (2) is applied is by sample
The ping ripple of corresponding polarity can be produced during portion's Charge sites；Ping ripple be transferred through sample and bottom electrode upper cover plate (4) it
Received afterwards by thin film sensor (5) and be changed into electric signal, the electric signal waveform exported afterwards is put by low-noise amplifier (7)
Greatly, and integrated Circuit Matching line (10) carry out waveform modification, finally by oscillograph (11) receive, afterwards by obtained waveform pair
Signal data is demarcated and denoising, the final distribution of charges and electric-field intensity distribution for obtaining sample；
The charge collection principle of sample under electron irradiation environment is directly injected into for electronics, the system under electron irradiation environment
Measurement need not access DC voltage, so do not need DC high-voltage source (3), electricity is directly received using Top electrode (1) is measured
Son injection, electrons stay directly forms space charge inside sample, and the pulse then sent using pulse generating unit (2) is swashed
The acoustic signals related to electric charge are sent, acoustic signals are transmitted with sample and bottom electrode upper cover plate (4) for medium, by film
Sensor (5) receives and is converted into corresponding electric signal；Subsequent electric signal amplifies by low-noise amplifier (7), then through product
Parallel circuit matched line (10) carries out waveform modification, is finally obtained by oscillograph (11), afterwards by obtained waveform to signal data
Demarcated and denoising, the final distribution of charges and electric-field intensity distribution for obtaining sample.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108181517A (en) * | 2017-12-28 | 2018-06-19 | 全球能源互联网研究院有限公司 | A kind of device and method for being used to detect high-voltage cable joint Space-charge |
| CN109239434A (en) * | 2018-08-03 | 2019-01-18 | 上海交通大学 | The measuring device of surface potential on-line monitoring |
| CN110398672A (en) * | 2019-07-31 | 2019-11-01 | 国网陕西省电力公司电力科学研究院 | A kind of sample structure and method measuring insulating materials ionization and charge transport parameters |
| CN110515021A (en) * | 2019-08-29 | 2019-11-29 | 西安交通大学 | A kind of bearing calibration of free voltage waveform effect down space charge test |
| CN112147425A (en) * | 2020-08-27 | 2020-12-29 | 西安交通大学 | Low-temperature space charge measuring system |
| CN112327116A (en) * | 2020-11-05 | 2021-02-05 | 北京理工大学 | Discharge detection system and method based on parylene film and charged particles |
| CN114167155A (en) * | 2021-11-26 | 2022-03-11 | 华北电力大学 | Novel electrode structure adaptive to photoelectronics space charge measurement method |
| CN117590100A (en) * | 2023-11-27 | 2024-02-23 | 兰州理工大学 | Space charge measurement method and system based on non-contact vibration measurement |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108181517A (en) * | 2017-12-28 | 2018-06-19 | 全球能源互联网研究院有限公司 | A kind of device and method for being used to detect high-voltage cable joint Space-charge |
| CN109239434A (en) * | 2018-08-03 | 2019-01-18 | 上海交通大学 | The measuring device of surface potential on-line monitoring |
| CN109239434B (en) * | 2018-08-03 | 2020-10-30 | 上海交通大学 | Measuring device for on-line monitoring of surface potential |
| CN110398672A (en) * | 2019-07-31 | 2019-11-01 | 国网陕西省电力公司电力科学研究院 | A kind of sample structure and method measuring insulating materials ionization and charge transport parameters |
| CN110398672B (en) * | 2019-07-31 | 2021-08-03 | 国网陕西省电力公司电力科学研究院 | Sample structure and method for measuring ionization and charge transfer parameters of insulating material |
| CN110515021A (en) * | 2019-08-29 | 2019-11-29 | 西安交通大学 | A kind of bearing calibration of free voltage waveform effect down space charge test |
| CN110515021B (en) * | 2019-08-29 | 2020-08-18 | 西安交通大学 | Correction method for space charge test under action of arbitrary voltage waveform |
| CN112147425A (en) * | 2020-08-27 | 2020-12-29 | 西安交通大学 | Low-temperature space charge measuring system |
| CN112327116A (en) * | 2020-11-05 | 2021-02-05 | 北京理工大学 | Discharge detection system and method based on parylene film and charged particles |
| CN114167155A (en) * | 2021-11-26 | 2022-03-11 | 华北电力大学 | Novel electrode structure adaptive to photoelectronics space charge measurement method |
| CN117590100A (en) * | 2023-11-27 | 2024-02-23 | 兰州理工大学 | Space charge measurement method and system based on non-contact vibration measurement |
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