CN102830383B - Atmospheric electric field calibration system with high precision and wide range - Google Patents
Atmospheric electric field calibration system with high precision and wide range Download PDFInfo
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- CN102830383B CN102830383B CN201110162132.0A CN201110162132A CN102830383B CN 102830383 B CN102830383 B CN 102830383B CN 201110162132 A CN201110162132 A CN 201110162132A CN 102830383 B CN102830383 B CN 102830383B
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Abstract
The invention relates to an atmospheric electric field calibration system with high precision and wide range. The atmospheric electric field calibration system comprises an electric field generator (21), a direct-current high-voltage power supply (22), a direct-current middle-voltage power supply (23), a direct-current low-voltage power supply (24), a high precision high-voltage ammeter (25), a digital ammeter (26), a high precision digital ammeter (27), a data acquisition card (28), an equal precision universal counter (29), a universal oscilloscope (210), a universal computer and data processing module (211), a super isolating transformer (213), an independent specific grounding wire (214) and the like; the atmospheric electric field calibration system is characterized in that the most important equipment of the atmospheric electric field calibration system with high precision and wide range is the simulation electric field generator (21), and the ratio of the diameters to the distance of high and low level plates is not less than 3. The total design error of the electric field calibration system provided by the invention is 1%; and the electric field calibration range is 0-100kV/m, the precision is high, the range is wide, and the interference resistance is strong.
Description
Technical field
The present invention relates to a kind of calibration system to weighing surveying instrument performance, particularly a kind of atmospheric electric field calibration system being used as the high-accuracy wide-range of the industry standard of meteorological department.
Background technology
Atmospheric electric field is one of principal character parameter in the forming processes such as thunderstorm, hail, sandstorm and earthquake, and electric field measurement guarantees that spacecraft goes up to the air safely, weather forecast, research space environment and space physics, Space Weather important means.The detection and application of electric field causes the concern of multidisciplinary scientific and technical personnel for a long time.
In the world, electric field measuring apparatus is widely used in an easily electrostatic, the safety monitoring being subject to the place of electrostatic and thunder disaster and the early warning such as monitoring, the lift-off safety guarantee of spacecraft, industrial factories and miness (as paper mill, wallpaper factory, printing house, refinery, explosive factory, tank farm and mine) of electrostatic environment near scientific measurement, high voltage DC power transmission line.Have developed ground, airborne, ball carries, arrow carries, spaceborne electric field instrument, and establish the Calibration system of electric field standard or benchmark.USSR (Union of Soviet Socialist Republics) establishes 24 × 24 × 10m electric field modular system
[1]; The U.S. establishes the Calibration system that precision reaches 0.3%
[2].IEEE has promulgated the technical standard of a DC electric field ionization meter in nineteen ninety, and this standard have passed the certification of ANSI October 12 nineteen ninety.The stated accuracy of this standard electric field is decided to be 1%.
Although China starts late to the development of electric field measurement instrument, also have the history in more than 40 years, there are more than 10 families in the unit of development.The ground electric field instrument that China runs now has hundreds, is mainly used in the early warning to diastrous weather.But electric field is the electricity parameter that China does not uniquely set up national standard or benchmark at present.No matter be ground electric field instrument, or electric field sonde, because China does not set up the calibration system of unified electric field standard, authenticity or the credibility of its measurement numerical value are difficult to determine.As 2006, National Meteorological Bureau's tissue carried out the Comparability test of 4 months by a definite date in the domestic and international manufacturer of the atmospheric electric field detector of China's use in In Xishuangbanna of Yunnan area at present.The result same type instrument that commensurate does not develop differs greatly in the result of the same time measurement in same place.Set up electric field standard and the Calibration system of unification of the motherland, with the consistance of the standardization and performance of guaranteeing electric field measurement instrument.Contribute to implementing, for the capability of independent innovation promoting China further provides technical support of ISO9000 quality management and quality assurance.Make up the defect only not having electric field standard in all parameters of China's electricity, fill the domestic gaps.
Patent No. ZL 200420006920.6 discloses a kind of caliberating device of electric field measurement instrument, although it has good linearity, can be used for ground electric field instrument, demarcation that ball carries two ball electric field instrument and Micro-rocket Electric Field Instrument.But due to technical conditions restriction at that time, error is comparatively large, is about 9%, has can not meet the requirement that electric field measurement improves day by day, and the record of timing signal operation and data adopts manual type completely, and the authenticity of data is also difficult to the impact avoiding human factor.Building up of this Calibration system, both can as the demarcation of electric field instrument, again can as electric field simulation signal source, native system design error 1%, actual root-mean-square error is 0.365%., almost close to the error of the high precision electric field calibration system 0.3% of the U.S., the demarcation of the low side of electric field instrument is also reduced to 5V/m from the 500V/m of ZL 200420006920.6, almost improve 100 times, especially in calibration process, adopt and automatically control and record, avoid the impact of human factor, can represent really by the performance of demarcating electric field instrument itself.
Summary of the invention
The object of the invention is to, set up a high-precision Calibration system, require that system accuracy is high, broad quantum, strong interference immunity, overall design error is 1%, and develops and can produce evenly and the simulate electric field generator of steady electric field.
For achieving the above object, the atmospheric electric field calibration system of a kind of high-accuracy wide-range provided by the invention, this atmospheric electric field calibration system comprises: stainless steel simulate electric field generator 21, for generation of the simulate electric field providing atmospheric electric field calibration system 0V/m-100kV/m, the DC high-voltage power supply 22 of high stability, in direct current, voltage source 23 and DC low voltage power supply 24 provide the voltage of the various numerical value of 0-20kV be applied between stainless steel noble potential plate 1 in simulate electric field generator 21 and electronegative potential plate 2 respectively, high-precision high voltage ammeter 25, digital electric meter 26, high accuracy number ammeter 27 and A/D data collecting card 28, equally accurate universal counter 29, general purpose oscialloscope 210, multi-purpose computer and control and data processing module 211, super isolating transformer 213.Independent Special grounding wire 214, it is characterized in that, described simulate electric field generator comprises a base 28 and is fixed on the cylindrical stainless steel shielding outer cover 29 on this base 28, and the inside of described cylindrical stainless steel shielding outer cover 29 coaxially arranges the plane-parallel capacitor being made up of simulate electric field generator main body the two blocks of circle be parallel to each other stainless steel noble potential plates 1 and electronegative potential plate 2; Described cylindrical stainless steel shielding outer cover 29 is provided with high insulating terminal 11 and low tension terminal 12, described high insulating terminal 11 is connected with noble potential plate, described low tension terminal 12 is connected with electronegative potential plate, described stainless steel noble potential plate 1 and the diameter of electronegative potential plate 2 and gap ratio >=3 (note: different ratios has different errors, ratio is larger, precision is higher, but processing more difficulty.)。5 is optimum ratios of the design.
One as technique scheme is improved, there is a perforate center of described stainless steel electronegative potential plate 1, and places electric field instrument probe by steel flange dish 3, and the part of the outstanding electronegative potential plate of this electric field instrument probe is up to 40mm, when not affecting error, maximum can only be 40mm.
Another kind as technique scheme improves, and between described stainless steel noble potential plate 1 and electronegative potential plate 2, is equidistantly provided with some conducting rings 5 and waits divider resistance 6 to form equipotential layer, reduce the impact of edge effect along panel edges.
Another kind as technique scheme improves, and described noble potential plate 1, electronegative potential plate 2 and ring flange 3 adopt nonmagnetic 304# stainless steel to make.Noble potential plate 1 and electronegative potential plate 2 are designed to circular plate type.
Another kind as technique scheme improves, and the described stainless steel shielding radius of outer cover 9 and the ratio of current potential plate radius are 2.5 times of the spacing of two current potential plates.
Another kind as technique scheme improves, described DC high-voltage power supply 22, voltage source 23 in direct current, DC low voltage power supply 24 provides scope between the output voltage of 0-20kV respectively, ensure that simulate electric field generator 21 produces the electric field value of 0V/m-100kV/m, achieving the Calibration scope of atmospheric electric field calibration system to electric field instrument is 0V/m-100kV/m.
Another kind as technique scheme improves, described digital electric meter 26, for measuring DC high-voltage power supply 22, voltage source 23 in direct current, the output voltage of DC low voltage power supply 24, wherein, digital electric meter 26 has the IO interface of RS232 or USB and computing machine compatibility, the voltage value of measurement is directly inputted computing machine and is converted into corresponding simulate electric field value through corresponding control and data processing module 211.
Another kind as technique scheme improves, and described calibration system also comprises super isolating transformer 213, and this super isolating transformer 213 Common-mode rejection is than being 120dB.
Another kind as technique scheme improves, and the stainless steel shielding radius of outer cover of simulate electric field generator 21 and the ratio of current potential plate radius are 2.5 times of the spacing of two current potential plates.
Another kind as technique scheme improves, described high accuracy number ammeter 27 or 16 A/D data collecting cards 28, voltage for measuring atmospheric electric field detector main frame exports, high accuracy number ammeter 27 has the IO interface of RS232 or USB and computing machine compatibility, and is directly inputted to computing machine through control and data processing module 211 are converted into corresponding electric field value to be measured accordingly.
Another kind as technique scheme improves, and the stainless steel platform of simulate electric field generator and placement simulation field generator thereof and the stainless steel laboratory table of placement support equipment form equipotential body by Special grounding wire.
Another kind as technique scheme improves, and in electric field instrument calibration process, adopts full-automatic record to data.
The invention has the advantages that, the present invention adopts a kind of atmospheric electric field calibration system of high-accuracy wide-range, wherein most critical equipment is simulate electric field generator 1, the simulate electric field that 0V/m-100kV/m is even and constant can be produced, this atmospheric electric field calibration system has that precision is high, broad quantum, anti-interference strong feature, and system total error is 1%.Actual root-mean-square error is 0.365%, almost close to the error of the high precision electric field calibration system 0.3% of the U.S..
Accompanying drawing explanation
Fig. 1 is simulate electric field generator schematic diagram.
Fig. 2 is Calibration system block diagram.
Accompanying drawing identifies
1, noble potential plate 2, electronegative potential plate 3, ring flange
4, the first insulation column 5, equipotential conducting ring 6, etc. divider resistance
7, the second insulation column 8, base 9, shielding outer cover
10, stainless steel dust cap 11, high insulating terminal 12, low tension terminal
21, voltage source in simulate electric field generator 22, DC high-voltage power supply 23, direct current
24, DC low voltage power supply 25, high pressure ammeter 26, digital electric meter
27, high accuracy number ammeter 28, A/D capture card 29, equally accurate universal counter
210, general purpose oscialloscope 211, multi-purpose computer 212, printer
213, super isolating transformer 214, Special grounding wire 215, by demarcation electric field instrument
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
The atmospheric electric field calibration system of a kind of high-accuracy wide-range provided by the invention, as shown in Figure 2, this atmospheric electric field calibration system comprises: stainless steel simulate electric field generator 21 produces the simulate electric field that can meet atmospheric electric field calibration system 0-100kV/m, the DC high-voltage power supply 22 of high stability, in direct current, voltage source 23 and DC low voltage power supply 24 provide the voltage of the various numerical value being applied to 0-20kV between stainless steel noble potential plate 1 and electronegative potential plate 2 in analog generator 21 respectively, high-precision high voltage ammeter 25, digital electric meter 26, high accuracy number ammeter 27 and A/D data collecting card 28, equally accurate universal counter 29, general purpose oscialloscope 210, multi-purpose computer and control and data processing module 211, super isolating transformer 213.Independent grounding wire 214, it is characterized in that, described simulate electric field generator comprises a base 28 and is fixed on the cylindrical stainless steel shielding outer cover 29 on this base 28, and the inside of described cylindrical stainless steel shielding outer cover 29 coaxially arranges the plane-parallel capacitor of the simulate electric field generator main body comprising two blocks of circular stainless steel noble potential plates 1 be parallel to each other and electronegative potential plate 2 formation; Described cylindrical stainless steel shielding outer cover 29 is provided with high insulating terminal 11 and low tension terminal 12, high pressure is incorporated into noble potential plate by described high insulating terminal 11, earth potential is incorporated into electronegative potential plate by described low tension terminal 12, described stainless steel noble potential plate 1 and the diameter of electronegative potential plate 2 and gap ratio are 5, as shown in Figure 1.High-accuracy wide-range atmospheric electric field calibration system provided by the present invention, wherein, simulate electric field generator 21 produces the even and constant electric field of 0V/m-100kV/m, is the equipment setting up high-precision atmospheric electric field calibration system most critical.In this example, adopt the DC high-voltage power supply 22 of HV-203P3 high stability, voltage source 23 in MPS-308 direct current, LPS-202A DC low voltage power supply 24 provides and is applied to the voltage of simulate electric field generator 21 between the various numerical value of 0-20kV, to guarantee the electric field value producing every meter 0 volt to every meter hundred kilovolts.The high pressure (0-40kV) be applied in simulate electric field generator 21 between high electronegative potential plate directly measured by HVC-803 high-precision high voltage ammeter 25, PLUCKE-8840A digital electric meter 26 measures DC high-voltage power supply 22, voltage source 23 in MPS-308 direct current, the output voltage of LPS-202A DC low voltage power supply 24, directly inputs computing machine and is converted into corresponding simulate electric field value by the voltage value of measurement.PLUCKE-8846A high accuracy number ammeter 27 or 16 A/D data collecting cards 28 export with the voltage signal of the main frame of high resolving power measurement atmospheric electric field detector, are directly inputted to computing machine and are converted into corresponding electric field value to be measured.The rotating speed of electric field instrument measured by SP312B equally accurate universal counter 29, is directly inputted to computing machine to weigh the stability of electric field instrument work.The synchronous detection waveform of atmospheric electric field detector main frame monitored by TDS-1012 general purpose oscialloscope 210, monitors the duty of electric field instrument.DELL-OP380 multi-purpose computer 211 and special software control Calibration system and calculate.HP-P1008 printer 212 prints electric field instrument nominal data form and calibration curve.The super isolating transformer 213 of WH-38902 with the Common-mode rejection of 120dB than the alternating current 220V providing Calibration system, to eliminate the clutter interference on civil power 220V.Independently Special grounding wire 214, avoids system to suffer to come from the interference of other instrument and equipments by common ground.Wherein:
The DC high-voltage power supply 22 of HV-203P3 high stability, voltage source 23 in MPS-308 direct current, LPS-202A DC low voltage power supply 24 provide be applied to simulate electric field generator 21 high electronegative potential plate between the voltage of various numerical value of 0-20kV, to guarantee that simulate electric field generator 21 produces the electric field value of every meter 0 volt to every meter hundred kilovolts.
Precision be 0.5% HVC-803 high pressure ammeter 25 directly measure the high pressure (0-40kV) be applied between high electronegative potential plate.PLUCKE-8840A digital electric meter 26, measures DC high-voltage power supply 22 by DC high-voltage power supply 22 output interface,
Measure voltage source 23 and the output voltage of LPS-202A DC low voltage power supply 24 in MPS-308 direct current, the voltage value of measurement is directly inputted computing machine 211 and be converted into the reference electric field value of corresponding simulate electric field value as Calibration.
PLUCKE-8846A high accuracy number ammeter 27 or PCI-8326BA/D capture card 28 measure the main frame of atmospheric electric field detector signal voltage with high resolving power exports, and is input to computing machine 211 and is converted into corresponding electric field value to be measured.
SP312B equally accurate universal counter 29 is measured the rotating speed of electric field instrument and is directly inputted to computing machine 211 to weigh the stability of electric field instrument work.
The synchronous detection waveform of atmospheric electric field detector main frame monitored by TDS-1012 general purpose oscialloscope 210, monitors the duty of electric field instrument.
DELL-OP380 multi-purpose computer 211 pairs of Calibration systems control and calculate.HP-P1008 printer 212 prints electric field instrument nominal data form and calibration curve.
The super isolating transformer 213 of WH-38902 than the alternating current 220V providing Calibration system, eliminates the clutter interference on civil power 220V with the Common-mode rejection of 120dB.
Special grounding wire avoids miscellaneous equipment to produce the interference to Calibration system by common ground.
Practice weekly notes of the present invention and method: the key issue of Calibration is that to set up a numerical value be known evenly steady electric field.To be parallel to each other according to two pieces and separated by a distance, and to there is the principle of uniform electric field between the infinitely great current-carrying plate being in different potentials, design simulation field generator 1, namely electric field E (U/m): E=U/L
In formula, U is the potential difference (PD) between simulate electric field generator 1 liang of current potential plate, and L is the distance between two current potential plates.
Known from formula, distance one timing between two flat boards, electric field is directly proportional to the voltage be added on two plates.Plate condenser formula simulate electric field generator is applicable to the absolute calibration of different size instrument, and the Calibration device that General Requirements precision is higher is all adopted in this way.The precision of electric field is except outside the Pass the assembly precision with the measuring accuracy of voltage and the spacing of two plates has, also relevant with the shape of the size of two flat boards, electric-field sensor to be calibrated, size and placement location, the principle of parallel plate capacitor formula simulate electric field generator: E=U/L, its error and the distance dependent between the potential difference (PD) be added between two plates and two plates, but this formula is of a size of infinity at supposition two parallel-plate, and set up when there is not any object between two flat boards.This ideally non-existent in practice, limited size certainly will distort at edge's line of electric force and equipotential line, namely produces edge effect; Its probe of electric field instrument timing signal will expose the electronegative potential plate in Calibration Box, and the line of electric force in Calibration Box and equipotential line also can be caused to distort.The roughness of the depth of parallelism in addition between two plates, flatness and inside surface, bad electric leakage of insulating, grounded shield body, from the distance of noble potential plate, also will produce error.If but when design simulation field generator, make the radius of two parallel-plates be greater than the radius of electric field instrument, the distance between two flat boards exceedes electric field instrument and to pop one's head in the height exposed in Calibration case.The error that the problems referred to above cause simulate electric field generator to produce simulate electric field can be placed restrictions on completely in required scope.
Specific design theory of the present invention is embodied in:
1, for setting up China's first professional Calibration system, the most substantially, the equipment of most critical is simulate electric field generator.The quality of its performance, by mistake extent play a major role to whole Calibration system.In order to make total error 1% reach requirement, select the size of Distance geometry two plate between rational two plates.The diameter of the high electronegative potential plate of the simulate electric field generator in system is Φ 1000mm, and the distance between high electronegative potential plate is 200mm, and the consideration of simulate electric field generator error and calculating are all of a size of benchmark with this and carry out.As size changes, error also will change.
2, in order to design the Calibration system of total error 1%, when drafting design proposal, the simplest way possible cause any one point error source of systematic error all to improve an order of magnitude to consider, is namely defined as 0.1% or less, to guarantee that the total error of system is no more than 1%.But difficulty is larger, under current level both at home and abroad, be practically impossible, as high-tension electricity shows that best precision is 0.5% both at home and abroad, also just like flatness, grounded shield outer cover, reach the error of 0.1%, cost is too large, and as earth-shielded impact will be dropped to 0.1% by wish, the diameter of shielding outer cover should be Φ 10000mm, too huge, operation is also inconvenient.The design of native system adopts comprehensive, balance, and complementation waits measure, finally reaches designing requirement.
3, the critical component of simulate electric field generator---non-magnetic 304# stainless steel selected by high electronegative potential plate, the error that homogeneity that is that affect simulate electric field generator electric field is brought to avoid oxidation or rustization or magnetization to make the Surface charge distribution of its inside surface uneven.
4, strictly key equipment is controlled---the machining precision of each parts of simulate electric field generator, overall assembly precision, and all need to detect the accreditation of authoritative unit assay through such as china institute of metrology etc.
5, disturb the impact on Calibration system, Calibration is at highly sensitive end, and signal only has the hundred microvolt orders of magnitude, prevents the impact of interference too not important.Common ground line is mainly come from for interference, public power 220V and be dispersed in three kinds of approach of various spurious electromagnetic waves in space, adopting the super isolating transformer 22 of WH-38902 to power than providing the alternating current 220V of Calibration system with the Common-mode rejection of 120dB, eliminating the clutter interference on civil power 220V.Adopt independently special ground wire, avoid the interference because of public ground wire, the interference of the spurious electromagnetic waves adopting the isolation of Φ 2000 × 750mm ground shield to come to be dispersed in space especially electric field.
6, to the direct influential testing tool of systematic error as selected domestic and international precision the highest, all appts is all through the accreditation of metering authoritative unit assay.
7, because native system is designed to full-automatic record, in calibration process, directly monitoring all should be had the connecting interface with computing machine by the surveying instrument demarcating electric field instrument performance, processes so that measurement data directly inputs computing machine.
8, design accuracy is the Calibration system of 1%, difficulty is larger, through many experiments and local improvement, finally designing requirement is reached, performance and original two kinds of caliberating devices of system increase significantly, the calibration range of electric field instrument is made to bring up to 5V/m-100kV/m by 0.5kV/m-50kV/m, in low end extension 100 times, root-mean-square error reaches 0.365% (precision of former pair of ball Calibration device is 9%), almost close to the level of the most accurate Calibration system accuracy 0.3% of the U.S..The full-automatic record of Calibration process implementation, more positively to reflect by the actual performance of demarcating electric field instrument.
9, the placement platform of simulate electric field generator, detecting instrument are placed the conductive non-magnetic stainless steel of the equal apparatus of laboratory table and be processed into, and be connected with Special grounding wire, make simulate electric field generator 21 and placement platform thereof, instrument 22-212 places laboratory table becomes equipotential body, electrostatic can be prevented the impact of simulate electric field generator, the personal safety under high pressure can be guaranteed again.
10, this Calibration system is to measurement range, the measurement sensistivity of electric field instrument, can also carry out comprehensive measurement and assessment outside the Calibration such as measuring error, the linearity, simultaneously to the duty of electric field instrument, short-term and long stability etc.
It should be noted last that, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted.Although with reference to embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, modify to technical scheme of the present invention or equivalent replacement, do not depart from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (10)
1. the atmospheric electric field calibration system of a high-accuracy wide-range, this atmospheric electric field calibration system comprises: stainless steel simulate electric field generator (21) produces the simulate electric field being used for atmospheric electric field calibration system 0V/m-100kV/m, the DC high-voltage power supply (22) of high stability, in direct current, voltage source (23) and DC low voltage power supply (24) provide the voltage of the various numerical value between stainless steel noble potential plate (1) and electronegative potential plate (2) being applied to and forming simulate electric field generator (21) respectively, high-precision high voltage ammeter (25), digital electric meter (26), high accuracy number ammeter (27) or A/D data collecting card (28), equally accurate universal counter (29), general purpose oscialloscope (210), multi-purpose computer and control and data processing module (211), super isolating transformer (213) and independent grounding wire (214), it is characterized in that, described simulate electric field generator comprises a base (28) and is fixed on cylindrical stainless steel shielding outer cover (29) on this base (28), the inside of described cylindrical stainless steel shielding outer cover (29) coaxially arranges the plane-parallel capacitor be made up of two pieces of circular stainless steel noble potential plates (1) be parallel to each other and electronegative potential plate (2), described cylindrical stainless steel shielding outer cover (29) is provided with high insulating terminal (11) and low tension terminal (12), described high insulating terminal (11) is connected with noble potential plate (1), described low tension terminal (12) is connected with electronegative potential plate (2), described stainless steel noble potential plate (1) and the diameter of stainless steel electronegative potential plate (2) and gap ratio >=3,
There is a perforate center of described stainless steel electronegative potential plate (2), and places electric field instrument probe by steel flange dish (3), and the part of the outstanding electronegative potential plate of this electric field instrument probe is up to 40mm.
2. the atmospheric electric field calibration system of high-accuracy wide-range according to claim 1, it is characterized in that, between described stainless steel noble potential plate (1) and stainless steel electronegative potential plate (2), along panel edges be equidistantly provided with some conducting rings (5) and etc. divider resistance (6) form equipotential layer, to reduce the impact of edge effect.
3. the atmospheric electric field calibration system of high-accuracy wide-range according to claim 1, it is characterized in that, described stainless steel noble potential plate (1), stainless steel electronegative potential plate (2) and ring flange (3) adopt nonmagnetic 304# stainless steel to make.
4. the atmospheric electric field calibration system of high-accuracy wide-range according to claim 1, is characterized in that, the described radius of stainless steel shielding outer cover (9) and the ratio of current potential plate radius, its ratio is 2.5 times of the spacing of two current potential plates.
5. the atmospheric electric field calibration system of high-accuracy wide-range according to claim 1, it is characterized in that, described DC high-voltage power supply (22), voltage source (23) in direct current, the output voltage that DC low voltage power supply (24) provides is 0-20kV, the voltage range that DC high-voltage power supply (22) provides is between 0-20KV, the voltage range that in direct current, voltage source (23) provides is between 0-300V, the simulate electric field that simulate electric field generator (1) produces is 0V/m-100kV/m, atmospheric electric field calibration system is 0V/m-100kV/m to electric field instrument calibration range.
6. the atmospheric electric field calibration system of high-accuracy wide-range according to claim 1, it is characterized in that, described digital electric meter (26), there is the IO interface with computing machine compatibility, for measuring DC high-voltage power supply (22), voltage source (23) in direct current, the output voltage of DC low voltage power supply (24), and be directly inputted to computing machine.
7. the atmospheric electric field calibration system of high-accuracy wide-range according to claim 6, it is characterized in that, described adopts RS232 or USB interface with the IO interface of computing machine compatibility.
8. the atmospheric electric field calibration system of high-accuracy wide-range according to claim 1, it is characterized in that, described A/D data collecting card (28) adopts 16 A/D data collecting cards (28), for measuring the output voltage of atmospheric electric field detector main frame, and be directly inputted to computing machine through control and data processing module (211) are converted into corresponding electric field value to be measured accordingly.
9. the atmospheric electric field calibration system of high-accuracy wide-range according to claim 1, it is characterized in that, described calibration system also comprises super isolating transformer (213), and this super isolating transformer (213) Common-mode rejection is than being 120dB.
10. the atmospheric electric field calibration system of high-accuracy wide-range according to claim 1, it is characterized in that, the stainless steel platform of described simulate electric field generator and placement simulation field generator thereof is all connected with Special grounding wire with the stainless steel laboratory table placing support equipment, forms globality equipotential volume.
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| CN103837750B (en) * | 2012-11-22 | 2017-03-22 | 北京中科飞龙传感技术有限责任公司 | Temperature drift and time drift real-time difference compensation method for electric-field sensor |
| CN105785301A (en) * | 2016-03-31 | 2016-07-20 | 中国电力科学研究院 | Rotary direct-current electric field sensor automatic calibration system |
| CN105974346B (en) * | 2016-04-28 | 2021-04-23 | 中国科学院电子学研究所 | Automatic calibration device and calibration method for electrostatic field sensor |
| CN114779147B (en) * | 2022-04-07 | 2022-11-22 | 中国工程物理研究院计量测试中心 | Remote control non-contact type electrostatic voltmeter calibration method |
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| CN102830383A (en) | 2012-12-19 |
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