CN101907659B - Temperature controllable PEA space charge test device - Google Patents
Temperature controllable PEA space charge test device Download PDFInfo
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Abstract
The invention belongs to the high voltage and insulation technical field, in particular relates to a temperature controllable PEA space charge test device. The test device is composed of an upper electrode, a lower electrode, a space charge collecting channel and a temperature control measuring unit. A groove-shaped lower electrode is inlaid in a lower electrode insulation clapboard, the lower electrode insulation clapboard is inlaid in a lower electrode clapboard, so as to form the lower electrode, a piezoelectric sensor is adhered on the lower surface of the groove-shaped lower electrode to collect space charge, a voltage signal transmitted by a metal film coated organic glass column is displayed by an oscilloscope, the heating coil of the temperature control measuring unit is coated in the outer side of the groove-shaped lower electrode to heat the groove-shape lower electrode, so as to provide a temperature field for a sample, a platinum resistor is inlaid in the bottom surface of the groove-shaped lower electrode to measure the temperature of the sample, and the platinum resistor is connected with a computer by virtue of a thermodetector. The invention can measure dielectric medium space charge under different temperature conditions, so that researching on dielectric medium space charge characteristic can be realized, thus being especially applicable to test and research of electrical insulating material.
Description
Technical field
The invention belongs to the high voltage and insulation technology field, particularly the controlled PEA space charge proving installation of a kind of temperature.
Background technology
Space charge is an important parameter that characterizes the dielectric substance electric property, and space charge measurement has great significance for the research of dielectric dielectric properties.At present, generally acknowledge generally that in the world space charge has the distortion effect to electric field, the distribution of space charge and motion are led, electrical breakdown, aging etc. strong impact are arranged the electricity of insulating material.Under electric field action, especially DC electric field, space charge gathers Electric Field Distribution in the insulating material of polymer that can seriously distort, and cause the compound of electric charge and excitation, thus the material early damage caused, as increase thermionic generating rate, reduce the energy barrier of material aging, cause the generation of scission of link, micropore enlarges and internal stress, and finally causes material breakdown.Therefore, the change that the existence of space charge, transfer and disappearance can directly cause the insulating material internal electric field to distribute is played the effect that weakens or strengthen to the internal field of material internal, has influence on the various aspects of material electrical specification.
Aspect space charge research, at present domestic and international what do mostly is the research of experimental, and concentrates on the polythene material take cable insulation as application background.Along with test and measurement data perfect, the research work that present many theoretical explanations, model are set up has also all been carried out.Be still an outstanding issue yet how trapped charge affects the performance of material.Studies show that the change of density of trapping charges causes electric charge to enter to fall into the change of transmission course, finally affects the migration of charge carrier, be reflected on the macroscopic view in the variation that electricity leads.
Pulse electroacoustic method (PEA) is present comparatively popular space charge measuring technology in the world, to be the eighties in last century reach male professor by the high fields of Musashi Institute of Technology proposes, and progressively develops through long-time research, and this technology has been widely used in measurement and the analysis of dielectric substance space charge in the world.
Electrical specification and the temperature of insulating material are closely related, and " 10 metrics then " usually mentioned, " 8 metrics then ", " 6 metrics then ", have embodied the relation between its insulation of electrical installation life-span and the temperature.Aspect material aging, insulating material rising along with temperature after polarization can discharge depolarization current, has also proved absolutely the impact of temperature on the microscopic characteristics of material.Temperature has directly determined the thermal motion level of molecule, and the mobility of charge carrier and temperature are closely related in the dielectric, thus space charge also certain and temperature close relationship is arranged.The insulating material that has normally is operated in high temperature, high pressure and is accompanied by under the rugged surroundings of various high-energy rays, and for example generator and motor often are to be operated under the condition of high temperature.Only have measurement and the analysis of the space charge of introducing the temperature field, could understand better in actual applications dielectric space charge characteristic.But the research of existing space charge to various materials is all at room temperature carried out substantially, can not realize the PEA space charge test that temperature is controlled.
Summary of the invention
The objective of the invention is to solve the problem that prior art can not realize the PEA space charge test that temperature is controlled, for the test that realizes the space charge of insulating material under the high temperature provides a kind of temperature controlled PEA space charge proving installation, the electrode structure of proving installation comprises top electrode, bottom electrode, space charge acquisition channel and temperature control survey unit four parts, flute profile bottom electrode 8 notches upwards are embedded in the bottom electrode insulating barrier 18, bottom electrode insulating barrier 18 is embedded in the bottom electrode dividing plate 10, piezoelectric sensor 17 is attached to the lower surface of flute profile bottom electrode 8, the organic glass post 16 of metal-coated membrane places under the piezoelectric sensor 17, the organic glass post 16 that insulation sleeve 13 coats piezoelectric sensor 17 and metal-coated membrane places in space charge collector 7 shells 14, space charge collector shell 14 is fixed in the lower surface of flute profile bottom electrode 8 with piezoelectric sensor 14, the organic glass post 16 of metal-coated membrane and insulation sleeve 13 compress, the upper surface of flute profile bottom electrode 8 is the bottom electrode plane, left side brackets 23 and right side support 24 are fixed on bottom electrode dividing plate 10 belows and are used for supporting whole device, charge signal SMA coaxial socket 15 is fixed in space charge collector shell 14 center holes, the metal film that the inner wire of charge signal SMA coaxial socket 15 passes organic glass post 16 lower surfaces of insulation sleeve 13 and metal-coated membrane reliably electrically contacts, charge signal prime amplifier 12 is fixed on the lower surface of bottom electrode dividing plate 10, charge signal prime amplifier 12 input ends are connected with charge signal SMA coaxial socket 15, and output terminal is connected with charge signal SMA coax plug 11 on being fixed in left side brackets 23 or right side support 24;
High input voltage BNC socket 2 is enclosed within and is embedded in columniform top electrode shell 1 upper surface in the High-Voltage Insulation rubber ring 3, top electrode newel 7 places in the top electrode metal shell 1, the lower surface of top electrode newel 7 and top electrode shell 1 lower surface are in same plane, be connected a protective resistance 22 between the upper surface of top electrode newel 7 and the high input voltage BNC socket 2, all be connected with bare conductor between the upper surface of top electrode newel 7 and the protective resistance 22 and between the inner wire of protective resistance 22 and high input voltage BNC socket 2, pulse input BNC socket 4 is enclosed within and also is embedded in columniform top electrode shell 1 upper surface in the pulse electro-insulating rubber circle 5, the upper surface of top electrode newel 7 is inputted between the BNC socket 4 with pulse and is connected high pressure capacitance 6, all be connected with bare conductor between the upper surface of top electrode newel 7 and the high pressure capacitance 6 and between the inner wire of high pressure capacitance 6 and high pressure BNC socket 2, epoxy resin 25 is cast in top electrode metal shell 1 inside, top electrode newel 7, protective resistance 22 and high pressure capacitance 6 are fixed on movably electrode on the whole of top electrode shell 1 interior formation, the lower surface of top electrode newel 7 is the top electrode plane, sample 19 places on the bottom electrode plane, semiconduction pad 20 places on the sample 19, electrode is pressed on the semiconduction pad 20 at flute profile bottom electrode 8 interior top electrode newels 7 on the whole, and electrode is by conducting oneself with dignity the top electrode plane on the whole, semiconduction pad 20, sample 19 and bottom electrode plane compress;
The circuit of device is connected to, the high-voltage output end of high-voltage DC power supply 26 is connected with high input voltage BNC socket 2, the high voltage narrow pulse output terminal of impulse source 27 is connected with pulse input BNC socket 4, the Y input end of oscillograph 28 is connected connection with charge signal SMA coax plug, the synchronous output end of impulse source 27 is connected with the synchronous input end of oscillograph 28, the data output end of oscillograph 28 is connected with the data input pin of computing machine 29, the output terminal of controller 30 of heating is connected with the heater coil input end of heating collar 21, the temperature control end of controller 30 of heating is connected with computing machine 29 data output ends, and platinum resistance 9 is connected to the data input pin of computing machine 29 by temperature measurer 31.
Described flute profile bottom electrode 8 and bottom electrode insulating barrier 18, bottom electrode insulating barrier 18 all utilizes the interference fit technology to fix with bottom electrode dividing plate 10.
Ion sputtering instrument vacuum metallizing (Au) film is all used on the upper lower plane of the organic glass post 16 of described metal-coated membrane and the face of cylinder.
The upper surface of described top electrode newel 7 and flute profile bottom electrode 8 and lower surface are all through mirror polish.
The Standard resistance range of described protective resistance 22 is 1.0～3.0M Ω.
The electric capacity of described high pressure capacitance 6 is 100～1000pF, and should be not less than 10 times of the electric capacitys of tested sample.
The material of described top electrode newel 7 is aluminium or copper.
The material of described flute profile bottom electrode 8 is aluminium.
The material of described top electrode shell 1, space charge collector shell 14, bottom electrode dividing plate 10, left side brackets 23 and right side support 24 is aluminium.
The material of described bottom electrode insulating barrier 18 and insulation sleeve 13 is teflon.
Described platinum resistance 9 is embedded in flute profile bottom electrode 8 bottom surfaces, can not affect sample 19 and contact with the reliable of lower electrode surface.
The framework material of described heating collar 21 is stainless steel.
Described semiconduction pad 8 is common semiconductive material, mixes poly semiconductive material film such as graphite, prevents that mainly sound wave from reflecting at the interface.
The course of work of the present invention is: set the test job temperature, heat to sample, then the utmost point applies high-voltage dc to sample from power on, make and produce space charge in the sample, the utmost point applies high voltage narrow pulse to sample from power on simultaneously, so that microvibration occurs in the space charge of sample core in the part under pulse action, the bottom electrode of ground connection is passed in this vibration with the form of sound wave, be converted into electric signal by the piezoelectric sensor that is close to flute profile bottom electrode lower surface, amplify through the charge signal prime amplifier again, read this waveform voltage signal with oscillograph, because the size of the size of vibration amplitude and the quantity of electric charge is relevant, the priority time of vibration arrival sensor has been reflected the diverse location of space charge.Therefore, the voltage signal that receives through piezoelectric sensor is exactly the signal that comprises the size and location of sample Space-charge amount.The waveform that oscillograph is read is read and write computing machine by the GPIB capture card, and computing machine carries out analyzing and processing with the signal that collects.
High direct voltage is added on the sample that resistance is the hundreds of megaohm order of magnitude, and bottom electrode is earth potential with respect to high direct voltage.In the pulse input circuit, in order to prevent the impact in high direct voltage paired pulses source, capacitance of serial connection between pulse input BNC socket and top electrode newel.
Temprature control unit is at first by the computer settings temperature, by the heating of temperature controller control heating collar, the PT100 platinum resistance is carried out temperature survey simultaneously, and will measure temperature feedback to computing machine, and reaching design temperature if measure temperature, computing machine then orders the temperature controller stopped heating to heat up.
The present invention takes following measures, realizes the test of space charge under the sample different temperatures:
1. when bottom electrode is heated, in order to prevent that the charge signal prime amplifier is affected, employing is undertaken heat insulation by bottom electrode insulating barrier 18 flute profile bottom electrode 8 and bottom electrode dividing plate 10, can guarantee like this charge signal prime amplifier working stability, simultaneously in order to accelerate the heat radiation of bottom electrode dividing plate below, whole bottom electrode dividing plate below is not sealed, and can accelerate like this circulation of air.
2. when temperature was implemented control, heating collar 21, platinum resistance 9, temperature measurer 31, computing machine 29, temperature controller 30 consisted of closed-loop system, realize the automatic control of temperature.
3. space charge PEA signal picker adopts the four-layer structure that organic glass post 16, insulation sleeve 13 and the space charge collector shell 14 of piezoelectric sensor 17, metal-coated membrane form, the interlayer close contact, also transmit the piezoelectric signal of piezoelectric sensor 17 with the organic glass post 16 of metal-coated membrane, guarantee that sound wave does not cause reflection, accurately the measurement space charge signal.
4. adopt the multiple shield design.Top electrode shell 1 and space charge collector shell 14 be ground connection all, and the transmission line of charge signal adopts shielded cable simultaneously, makes the links of charge signal transmission have the screen layer of ground connection to protect.
5. the high input voltage BNC socket 2 of top electrode, pulse input BNC socket 4, top electrode shell 1, protective resistance 22, high pressure capacitance 6 and top electrode newel 7 usefulness epoxy resin 5 are poured into a mould fixing; guarantee that top electrode is an integral body; the dielectric strength of epoxy resin is higher simultaneously, can improve the voltage that is added on the sample.Electrode makes the sample uniform stressed by deadweight on the whole.
6. in the pulse circuit, be connected in series high pressure capacitance 6 between pulse input BNC socket 4 and the top electrode newel 7, the assurance high direct voltage can not be coupled to impulse source, effectively protects impulse source.
Beneficial effect of the present invention is, because adopting heating collar to the sidewall heating of flute profile bottom electrode, can the Control Assay temperature carry out the PEA space charge of insulating material sample is tested, can carry out to sample the test of space charge under the different temperatures, the dielectric space charge characteristic of research is achieved.Be specially adapted to the test of electrical insulating material field and research.
Description of drawings
Fig. 1 is the PEA space charge proving installation electrode structure synoptic diagram that temperature can be surveyed;
Fig. 2 is the PEA space charge proving installation synoptic diagram that temperature can be surveyed.
Among the figure, 1--top electrode shell; 2--high input voltage BNC socket, 3--High-Voltage Insulation rubber ring, 4--pulse input BNC socket; 5--pulse electro-insulating rubber circle, 6--high pressure capacitance, 7--top electrode newel; 8--flute profile bottom electrode, 9--platinum resistance, 10--bottom electrode dividing plate; 11--charge signal SMA coax plug, 12--charge signal prime amplifier, 13--insulation sleeve; 14--space charge collector shell, 15--charge signal SMA coaxial socket, the organic glass post of 16--metal-coated membrane; the 17--piezoelectric sensor, 18--bottom electrode insulating barrier, 19--sample; 20--semiconduction pad; the 21--heating collar, 22--protective resistance, 23--left side brackets plate; 24--right side supporting plate; 25--epoxy resin, 26--high voltage direct current source, 27--impulse source; the 28--oscillograph; 29--computing machine, the 30--controller of heating, the 31--temperature measurer.
Embodiment
The present invention is described further by the following examples.Fig. 1 is the electrode structure synoptic diagram of embodiment, is comprised of four parts, i.e. top electrode, bottom electrode, space charge acquisition channel and temperature control survey unit.
In the top electrode; high input voltage BNC socket 2 is enclosed within and is embedded in columniform top electrode shell 1 upper surface in the High-Voltage Insulation rubber ring 3; columniform top electrode newel 7 places in the top electrode shell 1; the lower surface of top electrode newel 7 and top electrode shell 1 lower surface are in same plane; be connected a protective resistance 22 between the upper surface of top electrode newel 7 and the high input voltage BNC socket 2; all be connected with bare conductor between the upper surface of top electrode newel 7 and the protective resistance 22 and between the inner wire of protective resistance 22 and high input voltage BNC socket 2; pulse input BNC socket 4 is enclosed within and also is embedded in columniform top electrode shell 1 upper surface in the pulse electro-insulating rubber circle 5; the upper surface of top electrode newel 7 is inputted between the BNC socket 4 with pulse and is connected high pressure capacitance 6; all be connected with bare conductor between the upper surface of top electrode newel 7 and the high pressure capacitance 6 and between the inner wire of high pressure capacitance 6 and high pressure BNC socket 2; epoxy resin 25 is cast in top electrode metal shell 1 inside; top electrode newel 7; protective resistance 22 and high pressure capacitance 6 are fixed on movably electrode on the whole of top electrode shell 1 interior formation, and the lower surface of top electrode newel 7 is the top electrode plane.
In the bottom electrode, flute profile bottom electrode 8 is embedded in the bottom electrode insulating barrier 18, the profile of flute profile bottom electrode 8 is cylindrical, bottom electrode insulating barrier 18 is embedded in the bottom electrode dividing plate 10 of rectangle, the upper surface of flute profile bottom electrode 8 is the bottom electrode plane, and left side brackets 23 and right side support 24 are fixed on bottom electrode dividing plate 10 belows and are used for supporting whole device.
In the space charge acquisition channel, piezoelectric sensor 17 is attached to the lower surface of flute profile bottom electrode 8, the organic glass post 16 of metal-coated membrane places under the piezoelectric sensor 17, the organic glass post 16 that insulation sleeve 13 coats piezoelectric sensor 17 and metal-coated membrane places in space charge collector 7 shells 14, and space charge collector shell 14 is fixed in the lower surface of flute profile bottom electrode 8 with organic glass post 16 and insulation sleeve 13 compressions of piezoelectric sensor 14, metal-coated membrane.Sample 19 places on the bottom electrode plane, semiconduction pad 20 places on the sample 19, electrode is pressed on the semiconduction pad 20 at flute profile bottom electrode 8 interior top electrode newels 7 on the whole, electrode is by conducting oneself with dignity the top electrode plane on the whole, semiconduction pad 20, sample 19 and bottom electrode plane compress, charge signal SMA coaxial socket 15 is fixed in space charge collector shell 14 center holes, the metal film that the inner wire of charge signal SMA coaxial socket 15 passes organic glass post 16 lower surfaces of insulation sleeve 13 and metal-coated membrane reliably electrically contacts, charge signal prime amplifier 12 is fixed on the lower surface of bottom electrode dividing plate 10, charge signal prime amplifier 12 input ends are connected with charge signal SMA coaxial socket 15, and output terminal is connected with charge signal SMA coax plug 11 on being fixed in left side brackets 23 or right side support 24.
In temperature control survey unit, skeleton is that columniform heating collar 21 usefulness are threaded and are coated on the lateral surface of columniform flute profile bottom electrode 8, platinum resistance 9 is in the periphery of sample 19 is embedded in the arc-shaped slot of flute profile bottom electrode 8 bottom surfaces, platinum resistance 9 is connected with the data input pin of computing machine 29 by temperature measurer 31, the heater coil of heating collar 21 is connected with the output terminal of the controller 30 of heating, the Temperature Setting input end of controller 30 of heating is connected with computing machine 29, by computing machine 29 design temperatures, and the temperature of setting presented to the controller 30 of heating, the controller 30 control heating collars 21 of heating are heated, platinum resistance 9 is carried out temperature survey and measured temperature is transferred to computing machine 29 by temperature measurer 31 simultaneously, and platinum resistance 9 is the PT100 platinum resistance.
As shown in Figure 2, the circuit of device is connected to, the high-voltage output end of high-voltage DC power supply 26 is connected with high input voltage BNC socket 2, the high voltage narrow pulse output terminal of impulse source 27 is connected with pulse input BNC socket 4, the Y input end of oscillograph 28 is connected connection with charge signal SMA coax plug, the synchronous output end of impulse source 27 is connected with the synchronous input end of oscillograph 28, the data output end of oscillograph 28 is connected with the data input pin of computing machine 29, the output terminal of controller 30 of heating is connected with the heater coil input end of heating collar 21, the temperature control end of controller 30 of heating is connected with computing machine 29 data output ends, and platinum resistance 9 is connected to the data input pin of computing machine 29 by temperature measurer 31.
When measuring sample, sample 19 places on the bottom electrode plane, material is that graphite is mixed thin semiconduction pad 20 films of tygon semiconductive material and placed on the sample 19, whole top electrode is placed on the flute profile bottom electrode 8, relies on the deadweight of top electrode that top electrode plane, semiconduction pad 20, sample 19 and bottom electrode plane are compressed; As shown in Figure 2, the high-voltage output end of high-voltage DC power supply 26 is connected with high input voltage BNC socket 2, the high voltage narrow pulse output terminal of impulse source 27 is connected with pulse input BNC socket 4, the Y input end of oscillograph 28 is connected connection with charge signal SMA coax plug, the synchronous output end of impulse source 27 is connected with the synchronous input end of oscillograph 28, the data output end of oscillograph 28 is connected with the data input pin of computing machine 29, the output terminal of controller 30 of heating is connected with the heater coil input end of heating collar 21, the temperature control end of controller 30 of heating is connected with computing machine 29 data output ends, and platinum resistance 9 is connected to the data input pin of computing machine 29 by temperature measurer 31.High voltage narrow pulse is carried on the sample 19 by pulse input BNC socket 4 and high pressure capacitance 6, high direct voltage is carried in sample 19 from high input voltage BNC socket 2 input top electrode newels 7, design temperature on computing machine 29, the controller 30 control heating collars 21 of heating are heated to the temperature that needs.When temperature reaches needed temperature, input simultaneously the required high direct voltage of sample and high voltage narrow pulse, high pressure makes and produces space charge in the sample, high voltage narrow pulse makes the charge generation vibration form acoustic signals, acoustic signals converts voltage signal to by piezoelectric sensor 17 and passes in the oscillograph 28, then the collection of implementation space electric charge carries out the measurement of next temperature, has so just realized the measurement of dielectric substance space charge under the different temperatures.
In the device, the resistance of protective resistance 22 is 1.5M Ω, and high pressure capacitance 6 is the ceramic high-voltage capacitance of 500pF.The material of top electrode newel 7, top electrode shell 1, flute profile bottom electrode 8, bottom electrode dividing plate 10, space charge collector shell 14, left side brackets 23 and right side support 24 is aluminium, the framework material of heating collar 21 is stainless steel, the material of bottom electrode insulating barrier 18 and insulation sleeve 13 is teflon sheet material, and ion sputtering instrument vacuum metallizing film is all used on the upper lower plane of the organic glass post 16 of metal-coated membrane and the face of cylinder.Piezoelectric sensor 17 is the lithium niobate piezoelectric sensor, and thickness is 120 μ m, the surface electrode of aluminizing.The temperature data of PT100 platinum resistance reads in computing machine by temperature measurer 31, and the waveform that the temperature control data of the controller 30 of heating and oscillograph 28 are read is read and write computing machine by the GPIB capture card, by computing machine the signal that collects is carried out analyzing and processing at last.
The manufacture craft of this device requires:
1. need to be to the heart when top electrode is poured into a mould.Utilization to the accessory of the heart realize top electrode metal shell center and the top electrode newel center of circle to the heart.Simultaneously to produce bubble in the process in order preventing, to adopt the method for layer-by-layer casting, namely pour into a mould this one deck such as one deck and solidified again pour into a mould fully.
2. the upper surface of top electrode newel and flute profile bottom electrode and lower surface all will carry out mirror polish, otherwise affect measurement effect.
3. adopt the interference fit process technology to realize closely cooperating between flute profile bottom electrode, bottom electrode insulating barrier and the bottom electrode dividing plate three.
This device is mainly used in sheet or film-form insulating material are carried out the research of space charge characteristic.During use, take off on the whole electrode, with alcohol with upper electrode surface, semiconduction pad and lower electrode surface wiped clean; Lower electrode surface is coated silicone oil, and sample is placed on lower electrode surface, and guaranteeing does not have air to enter between sample and the bottom electrode; Upper electrode surface is coated silicone oil, and the semiconduction pad is close to upper electrode surface; A little silicone oil is dripped in sample upper surface center, puts top electrode well and prepares test.After the sample installation is ready, connect the circuit of all parts, set temperature, after the controller of heating was added to design temperature with temperature, the opening high pressure DC source applied required high direct voltage to sample, to applying high voltage narrow pulse on the sample, carry out the collection of space charge signal again.
The applicable high direct voltage scope of present embodiment is: 0～50KV; Temperature range: 20 ℃～100 ℃; The parameter area of high voltage narrow pulse is: pulse height: 400～600V, pulse width: several ns～tens ns, repetition frequency: 50～400Hz.
Claims (8)
1. PEA space charge proving installation that temperature is controlled, the electrode structure of proving installation comprises top electrode, bottom electrode, space charge acquisition channel and temperature control survey unit four parts, powering on very, epoxy resin (25) is cast in top electrode metal shell (1) inside, top electrode newel (7), protective resistance (22) and high pressure capacitance (6) are fixed on and consist of movably on the whole electrode in the top electrode shell (1), the space charge acquisition channel is by piezoelectric sensor (17), the organic glass post (16) of metal-coated membrane, insulation sleeve (13), space charge collector shell (14) and charge signal SMA coaxial socket (15) form, left side brackets (23) and right side support (24) are fixed on the whole device of bottom electrode dividing plate (10) supported underneath, the material of described left side brackets (23) and right side support (24) is aluminium, it is characterized in that, bottom electrode is by flute profile bottom electrode (8), bottom electrode insulating barrier (18) and bottom electrode dividing plate (10) form, flute profile bottom electrode (8) notch upwards is embedded in the bottom electrode insulating barrier (18), bottom electrode insulating barrier (18) is embedded in the bottom electrode dividing plate (10), the upper surface of flute profile bottom electrode (8) is the bottom electrode plane, piezoelectric sensor (17) is attached to the lower surface of flute profile bottom electrode (8), and the material of described bottom electrode dividing plate (10) is aluminium;
The heating collar (21) of temperature control survey unit is coated on the lateral surface of flute profile bottom electrode (8), platinum resistance (9) is embedded in flute profile bottom electrode (8) bottom surface and by temperature measurer (31) and is connected with the data input pin of computing machine (29), and the heater coil of heating collar (21) is connected with the output terminal of the controller of heating (30).
2. the controlled PEA space charge proving installation of a kind of temperature according to claim 1, it is characterized in that, described flute profile bottom electrode (8) and bottom electrode insulating barrier (18), bottom electrode insulating barrier (18) all utilizes the interference fit technology to fix with bottom electrode dividing plate (10).
3. the controlled PEA space charge proving installation of a kind of temperature according to claim 1 is characterized in that, the upper surface of described top electrode newel (7) and flute profile bottom electrode (8) and lower surface are all through mirror polish.
4. the controlled PEA space charge proving installation of a kind of temperature according to claim 1 is characterized in that the material of described flute profile bottom electrode (8) is aluminium.
5. the controlled PEA space charge proving installation of a kind of temperature according to claim 1 is characterized in that the material of described bottom electrode insulating barrier (18) is teflon sheet material.
6. the controlled PEA space charge proving installation of a kind of temperature according to claim 1 is characterized in that the framework material of described heating collar (21) is stainless steel.
7. the controlled PEA space charge proving installation of a kind of temperature according to claim 1 is characterized in that the Standard resistance range of described protective resistance (22) is 1.0～3.0M Ω.
8. the controlled PEA space charge proving installation of a kind of temperature according to claim 1 is characterized in that the electric capacity of described high pressure capacitance (6) is 100～1000pF, and should be not less than 10 times of the electric capacitys of tested sample.
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| CN106908650A (en) * | 2017-04-01 | 2017-06-30 | 上海交通大学 | The joint timesharing measurement apparatus and its method of space charge thermally stimulated current |
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| CN111521490B (en) * | 2020-06-08 | 2023-03-14 | 山东科技大学 | Induction test device for hydrogen bond fracture of loaded coal rock |
| CN112067059B (en) * | 2020-11-13 | 2021-04-20 | 宁波中车时代传感技术有限公司 | Temperature vibration composite sensor and manufacturing method thereof |
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| CN101706537A (en) * | 2009-11-16 | 2010-05-12 | 华北电力大学 | PEA space charge test device capable of testing conductive current |
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| CN101706537A (en) * | 2009-11-16 | 2010-05-12 | 华北电力大学 | PEA space charge test device capable of testing conductive current |
| CN101738546A (en) * | 2009-12-18 | 2010-06-16 | 西安交通大学 | Device, system and method for measuring space charges by using electro-acoustic (PEA) method |
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