CN2413294Y - Space charge distribution measruing arrangement - Google Patents
Space charge distribution measruing arrangement Download PDFInfo
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- CN2413294Y CN2413294Y CN 00216109 CN00216109U CN2413294Y CN 2413294 Y CN2413294 Y CN 2413294Y CN 00216109 CN00216109 CN 00216109 CN 00216109 U CN00216109 U CN 00216109U CN 2413294 Y CN2413294 Y CN 2413294Y
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Abstract
The utility model relates to a space charge distribution measuring device in solid dielectric material, composed of a sample testing chamber, an acoustoelectric / electroacoustic transducer, a high speed electric signal generator, a high voltage electric signal generator, a high-voltage DC power supply, a highly-resistant input amplifier, a low-resistant input amplifier, an oscilloscope and a computer. The device has high measuring precision and low cost. The good electrical shielding in testing environment avoids the exterior interference. The utility model can achieve two (PWP and PEA) methods for measuring, so as to reduce or avoid the randomness when measuring and raise the reliability and the accuracy of tested data. The utility model has wide purpose, and can carry out practical engineering measurement for space charge distribution in the solid dielectric material as well as be used for laboratory research for the space charge distribution in the solid dielectric material.
Description
The utility model relates to the device of measuring the distribution of space charge in the solid dielectric material, particularly functional electric dielectric material and insulating material.
Up to now, both at home and abroad to the solid dielectric material, have two kinds as the employed device one of the measurement of space CHARGE DISTRIBUTION in functional electric dielectric material and the insulating material: a kind of is to adopt the employed device of laser pressure wave method (PWP), and another kind is to adopt the employed device of pulse electroacoustic method (PEA).First kind of PWP is (with the pressure wave method of high power laser, also claim the LIPP method) device be to adopt high power laser to act on the laser target of special coupling with it, act on regard to the pressure pulse that a narrower in width is arranged on the sample of the dielectric substance of surveying, this pressure pulse is propagated with velocity of sound level in this sample, or be called acoustic-pulse propagation, at this moment, just can produce induced charge on the circuit at the two ends of this sample, measure open-circuit voltage or short-circuit current on the external circuit simultaneously, just can obtain the distribution of space charges of this sample.Second kind of PEA (pulse electroacoustic method) is with a high electric field pulse, act on two terminal circuits of the dielectric substance sample of surveying, the space charge of this sample is subjected to this high electric field pulse effect that adds, can produce micro displacement, this micro displacement can produce the acoustical signal of propagating to both sides, measure this acoustical signal, also can know the distribution of space charge situation of this dielectric sample.
But, above-mentioned two kinds of devices that method adopted all exist the shortcoming that is difficult to overcome: first kind of device that PWP is used, though to the not influence of character of sample to be tested, the high power laser in this device costs an arm and a leg, laser target is vulnerable to destroy in test process, can not under too high repetition frequency, measure, and this apparatus structure complexity, operation and maintenance is difficulty, therefore can only use in the laboratory, can not popularize, more can not be used for engineering survey.Second kind of device that PEA is used, though because of the generation of its measure portion with electricity, sound pulse separates, so even if sample is breakdown, measure portion can not suffer damage yet, but its high electric field pulse that adds can produce very important influence to the space charge of sample itself.
The purpose of this utility model is a kind of cheap, anti-external interference of design by force, does not exert an influence, also can realize the distribution of space charge of two kinds of measuring methods on a device to the sample to be tested performance a measurement mechanism.
In order to achieve the above object, the utility model is realized by following scheme.It is made up of sample testing chamber, acoustic-electric \ electroacoustic transducer, high-speed electrical signals generator, high-voltage signal generator, high-voltage DC power supply, high resistant input amplifier, low-resistance input amplifier, oscillograph and computing machine.Form by aluminium bar and piezoelectric membrane, can be with sound, acoustic-electric \ the electroacoustic transducer that electricity is changed mutually inserts the opening part above the sample testing chamber, the top of this acoustic-electric \ electroacoustic transducer is connected with high-speed electrical signals generator and impedance transducer thereof, the sample bench central lines that is provided with in its center vertical line and the sample testing chamber, can place different-thickness on the sample bench, the sample of the intrinsic specimen electrode of tow sides, intrinsic sample bench electrode under the sample bench, this sample bench electrode and be arranged between the insulating stand of sample testing chamber bottom and be provided with spring, thus the excellent electric contact of specimen electrode and sample bench guaranteed; The sample bench electrode is connected with resistance and electric capacity and the joint that is arranged on both sides, sample testing chamber respectively, joint can be respectively patches mutually with high-voltage DC power supply and high-voltage signal generator and low-resistance input amplifier thereof; The sample testing process is carried out in the sample testing chamber and the acoustic-electric \ electroacoustic transducer inside of playing shielding action, the external interference when having stopped test.
When on the utility model, adopting the PEA method to measure the distribution of space charge of sample, start the high-voltage signal generator and send electric impulse signal, when this high electric field pulse signal is applied on the sample, produced the acoustical signal that can reflect distribution of space charge, this acoustical signal propagates on the piezoelectric membrane by aluminium bar, piezoelectric membrane is transformed into current signal with acoustical signal, current signal propagates into impedance transducer by aluminium bar, after converting the current signal that records to voltage signal, be connected with digital oscilloscope with the high resistant input amplifier again, oscillograph is imported computing machine with voltage signal, can read the distribution of space charge of institute's test specimens from the setting program of computing machine.
When on the utility model, adopting PWP measurement space CHARGE DISTRIBUTION, start the high-speed electrical signals generator, the pressure pulse of the narrower in width that the high-speed electrical signals generator sends, this pressure pulse is delivered on the piezoelectric membrane by the aluminium bar of acoustic-electric \ electroacoustic transducer, produced the very narrow sound pulse of pulsewidth, and in sample, propagate with the sound pulse form, just can produce induced charge (being electric signal) on the electrode on sample two sides at this moment, these electric signal are by the low-resistance input amplifier, oscillograph is imported computing machine, just can read the distribution of space charge of institute's test specimens from the setting program of computing machine.
The utility model has the advantages that:
1. owing to having substituted high power laser and laser target, so under the prerequisite of the measuring accuracy that guarantees institute's test specimens, the manufacturing cost of this device reduces widely with high-voltage signal generator and acoustic-electric \ electroacoustic transducer.
2. owing to substituted high power laser and laser target generation pressure wave with high-speed electrical signals generator and acoustic-electric \ electroacoustic transducer in the device of the present utility model, so require very low to test environment, thereby make the utility model both can be used for the actual engineering survey of dielectric distribution of space charge, also can be used for laboratory study them.
3. because the whole part of detecting that sample testing chamber and acoustic-electric \ electroacoustic transducer constitute is electric shield to external world, so its interference of bound pair outward when having avoided measuring.
4. can on same device, realize the distribution of space charge of two kinds of (PWP and PEA) methods measurement samples owing to the utility model, so the randomness that reduces or avoided producing when measuring has improved the reliability and the accuracy of testing the gained data.
Accompanying drawing is embodiment of the present utility model, wherein:
Fig. 1 is a structural representation of the present utility model
Fig. 2 is a fundamental diagram of the present utility model.
The utility model will be further described in conjunction with the accompanying drawings.
The utility model is by left joint 1, sample testing chamber 2, specimen electrode 3, following aluminium bar 4, acoustic-electric \ electroacoustic transducer 5, high-speed electrical signals generator 6, impedance transducer 7, insulated ring 8, last aluminium bar 9, piezoelectric membrane 10, sample 11, sample bench 12, high-voltage signal generator 13, right connector 14, electric capacity 15, sample bench electrode 16, spring 17, insulating stand 18, resistance 19, high-voltage DC power supply 20, high resistant input amplifier 21, low-resistance input amplifier 22, oscillograph 23 and computing machine 24 are formed.
By following aluminium bar 4, last aluminium bar 9 and piezoelectric membrane 10 are formed, can be with sound, the opening part that the acoustic-electric \ electroacoustic transducer 5 that electricity is changed mutually inserts above the sample testing chambeies 2, after the top of this acoustic-electric \ electroacoustic transducer 5 seals by insulated ring 8, be connected with high-speed electrical signals generator 6 and impedance transducer 7 thereof respectively, the central lines of the sample bench 12 that is provided with in its center vertical line and the sample testing chamber 2, can place thickness at 0.1～10mm above the sample bench 12, shape is flat, tow sides coat or press the sample 11 of semi-conducting electrode 3 in advance, for avoiding the edge of specimen electrode 3 under high direct voltage to get an electric shock, the size of sample 11 should be greater than the size of sample bench 12, intrinsic sample bench electrode 16 below the sample bench 12, this electrode 16 and be arranged between the insulating stand 18 of 2 bottoms, sample testing chamber and be provided with spring 17, regulate by spring 17, guaranteed the excellent electric contact of sample 11; Sample bench electrode 16 is connected with right connector 14 with resistance 19 and electric capacity 15 and the left joint 1 that is arranged on 2 both sides, sample testing chamber respectively; Left side joint 1 can patch mutually with high-voltage DC power supply 20, and right connector 14 patches mutually with high-voltage signal generator 13 and low-resistance input amplifier 22; Sample testing chamber 2 and acoustic-electric \ electroacoustic transducer 5 have constituted the space of shielding action, the external interference when having stopped test.
Principle of work of the present utility model is as described below:
When on the utility model, adopting PEA to measure the distribution of space charge of sample, on positive and negative two faces of sample 11, coat or press specimen electrode 3 in advance, then they are placed on the sample bench 12 in place.Start high-voltage DC power supply 20 and high-voltage signal generator 13, high-voltage DC power supply 20 is by after resistance 19 current-limiting protections, specimen electrode 3 below sample bench electrode 16 and sample bench 12 arrival, high-voltage electric field is added to sample 11 bottoms, be connected with top specimen electrode 3, following aluminium bar 4, the shell of acoustic-electric \ electroacoustic transducer 5 and the grounding shell in sample testing chamber 2, form a power circuit; High-voltage signal generator 13 is inserted right connector 14, high-voltage signal generator 13 sends the high electric field pulse signal, pulse height is-2KV～-8KV, the width of pulse is several 10 nanoseconds, electric impulse signal enters electric capacity 15 in the sample testing chamber 2 from right connector 14, isolate out unnecessary spurious signal and be added to the bottom of sample 11, under same power circuit effect, space charge in the sample 11 powers up under the pulse action outside, produce acoustical signal, acoustical signal passes on the piezoelectric membrane 10 by the following aluminium bar 4 of acoustic-electric \ electroacoustic transducer 5 lower ends, piezoelectric membrane 10 is transformed into electric signal with acoustical signal, electric signal passes to impedance transducer 7 by last aluminium bar 9, convert the current signal that records to voltage signal, and then be passed to high resistant input amplifier 21 voltage signal is amplified, note by digital oscilloscope 23, with this voltage signal input computing machine 24, the distribution of space charge that from the setting program of computing machine 24, can directly read sample 11.
When on the utility model, adopting PWP measurement space CHARGE DISTRIBUTION, the sample 11 of carrying out specimen electrode 3 in advance on the two sides is in place on sample bench 12, start high-voltage DC power supply 20 and high-speed electrical signals generator 6, high-voltage DC power supply 20 arrives specimen electrode 3 by resistance 19, and high-voltage electric field is added to sample 11 two ends; Resistance 19 plays the current-limiting protection effect; pressure pulse 0～the 300V of the narrower in width that high-speed electrical signals generator 6 sends; negative edge was 10 nanoseconds; rising edge is more slow; pulse width is number nanosecond; cycle is hundreds of microns a driving electric pulse; this electric pulse is added on piezoelectric membrane 10 two ends by last aluminium bar 9; load end at piezoelectric membrane 10 produces the very narrow sound pulse of pulsewidth; in sample 11, propagate with the sound pulse form; just can produce electric signal on the specimen electrode 3 on sample 11 two sides; pass to sample bench electrode 16 by sample bench 12, arrive electric capacity 15 again to right connector 14 and low-resistance input amplifier 22, these electric signal are by low-resistance input amplifier 22; oscillograph 23 input computing machines 24 just can be read the distribution of space charge to institute's test specimens from the setting program of computing machine 24.
Claims (1)
1. the measurement mechanism of a distribution of space charge, it is characterized in that: it is by left joint (1), sample testing chamber (2), specimen electrode (3), following aluminium bar (4), acoustic-electric \ electroacoustic transducer (5), high-speed electrical signals generator (6), impedance transducer (7), insulated ring (8), last aluminium bar (9), piezoelectric membrane (10), sample (11), sample bench (12), high-voltage signal generator (13), right connector (14), electric capacity (15), sample bench electrode (16), spring (17), insulating stand (18), resistance (19), high-voltage DC power supply (20), high resistant input amplifier (21), low-resistance input amplifier (22), oscillograph (23) and computing machine (24) are formed; Insert the top opening part in sample testing chamber (2) by the acoustic-electric \ electroacoustic transducer (5) that descends aluminium bar (4), last aluminium bar (9) and piezoelectric membrane (10) to form; After the top of this acoustic-electric \ electroacoustic transducer (5) seals by insulated ring (8), be connected with impedance transducer (7) with high-speed electrical signals generator (6) respectively, impedance transducer (7) is connected with high resistant input amplifier (21), oscillograph (23) and computing machine (24); The central lines of the sample bench (12) that is provided with in the center vertical line of acoustic-electric \ electroacoustic transducer (5) and sample testing chamber (2), can place the sample (11) of the intrinsic in advance specimen electrodes of tow sides (3) above the sample bench (12), be provided with spring (17) between the intrinsic sample bench electrode (16) below the sample bench (12), this electrode (16) and the insulating stand (18) that is cemented in bottom the sample testing chamber (2); Sample bench electrode (16) also is connected with right connector (14) with resistance (19) and electric capacity (15) and the left joint (1) that is arranged on both sides, sample testing chamber (2) respectively; Left side joint (1) patches mutually with high-voltage DC power supply (20), and right connector (14) patches mutually with high-voltage signal generator (13), low-resistance input amplifier (22), oscillograph (23) and computing machine (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00216109 CN2413294Y (en) | 2000-01-11 | 2000-01-11 | Space charge distribution measruing arrangement |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00216109 CN2413294Y (en) | 2000-01-11 | 2000-01-11 | Space charge distribution measruing arrangement |
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| CN2413294Y true CN2413294Y (en) | 2001-01-03 |
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| CN 00216109 Expired - Fee Related CN2413294Y (en) | 2000-01-11 | 2000-01-11 | Space charge distribution measruing arrangement |
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| CN102944763A (en) * | 2012-11-20 | 2013-02-27 | 中国航天科技集团公司第五研究院第五一〇研究所 | System and method for in-situ testing of internal electric charge and electric field distribution of dielectric material |
| CN103105542A (en) * | 2013-01-17 | 2013-05-15 | 清华大学 | High voltage electrode device for pulsed electro-acoustic space charge measuring system |
| CN103412197A (en) * | 2013-06-05 | 2013-11-27 | 天津学子电力设备科技有限公司 | Laser induced thermal pulse polymer dielectric space charge measuring device and method |
| CN103576005A (en) * | 2013-11-25 | 2014-02-12 | 上海交通大学 | System for measuring space charges in solid dielectrics under needle-board electrodes |
| CN103884973A (en) * | 2014-04-14 | 2014-06-25 | 上海交通大学 | Needle-plate electrode medium space charge and partial-discharge ultrahigh-frequency signal synchronous measurement device |
| CN104237659A (en) * | 2014-09-03 | 2014-12-24 | 兰州空间技术物理研究所 | In-situ measurement device and method for space charges of dielectric material under electron irradiation |
| CN104297575A (en) * | 2014-10-14 | 2015-01-21 | 中国南方电网有限责任公司电网技术研究中心 | PEA space charge measurement system and method under full-size high-voltage direct current cable temperature control gradient |
| CN104698296A (en) * | 2015-02-09 | 2015-06-10 | 南方电网科学研究院有限责任公司 | Space charge measuring signal attenuation and dispersion factor compensation method |
| CN104833866A (en) * | 2015-04-30 | 2015-08-12 | 南京南瑞集团公司 | Pressure wave propagation model cable space charge test system |
| CN104833859A (en) * | 2015-04-30 | 2015-08-12 | 南京南瑞集团公司 | Plate specimen space charge distribution pressure-wave-propagation-method measuring device |
| CN104833868A (en) * | 2015-04-30 | 2015-08-12 | 南京南瑞集团公司 | High signal-to-noise ratio pressure wave propagation model cable space charge test system |
| CN104991130A (en) * | 2015-06-24 | 2015-10-21 | 同济大学 | Method for measuring space charge distribution of direct-current ultra-high-voltage cable |
| CN105092989A (en) * | 2014-04-30 | 2015-11-25 | 北京纳米能源与系统研究所 | Method and system of calculating piezoelectric charge distribution at piezoelectric electronics device interface |
| CN107607607A (en) * | 2017-08-23 | 2018-01-19 | 天津大学 | High-voltage direct-current cable accessory compound inslation interface trap energy level distribution calculation method |
| CN105548732B (en) * | 2015-12-11 | 2018-04-20 | 全球能源互联网研究院 | Insulating materials Space Charge Properties measuring system and method under a kind of temperature rise in short-term |
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| CN110244138A (en) * | 2019-05-29 | 2019-09-17 | 同济大学 | The two-sided in-situ measurement system and method for distribution of charges in a kind of thin dielectric film |
| 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 |
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-
2000
- 2000-01-11 CN CN 00216109 patent/CN2413294Y/en not_active Expired - Fee Related
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| CN102944763A (en) * | 2012-11-20 | 2013-02-27 | 中国航天科技集团公司第五研究院第五一〇研究所 | System and method for in-situ testing of internal electric charge and electric field distribution of dielectric material |
| CN103105542B (en) * | 2013-01-17 | 2015-01-14 | 清华大学 | High voltage electrode device for pulsed electro-acoustic space charge measuring system |
| CN103105542A (en) * | 2013-01-17 | 2013-05-15 | 清华大学 | High voltage electrode device for pulsed electro-acoustic space charge measuring system |
| CN103412197A (en) * | 2013-06-05 | 2013-11-27 | 天津学子电力设备科技有限公司 | Laser induced thermal pulse polymer dielectric space charge measuring device and method |
| CN103412197B (en) * | 2013-06-05 | 2016-08-10 | 天津学子电力设备科技有限公司 | A kind of induced with laser thermal pulse polymeric dielectric space charge measurement method |
| CN103576005A (en) * | 2013-11-25 | 2014-02-12 | 上海交通大学 | System for measuring space charges in solid dielectrics under needle-board electrodes |
| CN103884973A (en) * | 2014-04-14 | 2014-06-25 | 上海交通大学 | Needle-plate electrode medium space charge and partial-discharge ultrahigh-frequency signal synchronous measurement device |
| CN105092989B (en) * | 2014-04-30 | 2018-11-30 | 北京纳米能源与系统研究所 | Calculate the method and system of piezoelectric charge distribution at piezoelectron device interfaces |
| CN105092989A (en) * | 2014-04-30 | 2015-11-25 | 北京纳米能源与系统研究所 | Method and system of calculating piezoelectric charge distribution at piezoelectric electronics device interface |
| CN104237659A (en) * | 2014-09-03 | 2014-12-24 | 兰州空间技术物理研究所 | In-situ measurement device and method for space charges of dielectric material under electron irradiation |
| CN104297575A (en) * | 2014-10-14 | 2015-01-21 | 中国南方电网有限责任公司电网技术研究中心 | PEA space charge measurement system and method under full-size high-voltage direct current cable temperature control gradient |
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| CN105548732B (en) * | 2015-12-11 | 2018-04-20 | 全球能源互联网研究院 | Insulating materials Space Charge Properties measuring system and method under a kind of temperature rise in short-term |
| CN107607607A (en) * | 2017-08-23 | 2018-01-19 | 天津大学 | High-voltage direct-current cable accessory compound inslation interface trap energy level distribution calculation method |
| CN109142894A (en) * | 2018-07-05 | 2019-01-04 | 清华大学 | The test method of DC wire corona space charge distribution based on coupling principle of equipotentiality |
| CN110244138A (en) * | 2019-05-29 | 2019-09-17 | 同济大学 | The two-sided in-situ measurement system and method for distribution of charges in a kind of thin dielectric film |
| 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 |
| CN111175549A (en) * | 2020-01-03 | 2020-05-19 | 同济大学 | Composite probe for measuring polymer space charge distribution and measuring method thereof |
| CN111175549B (en) * | 2020-01-03 | 2020-11-27 | 同济大学 | Composite probe for measuring polymer space charge distribution and measuring method thereof |
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| CN111398697A (en) * | 2020-04-08 | 2020-07-10 | 山东大学 | Space charge test system and test method under periodic pulse electric field |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |