CN101576590B - Miniature electric field measuring apparatus - Google Patents
Miniature electric field measuring apparatus Download PDFInfo
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- CN101576590B CN101576590B CN200910026191A CN200910026191A CN101576590B CN 101576590 B CN101576590 B CN 101576590B CN 200910026191 A CN200910026191 A CN 200910026191A CN 200910026191 A CN200910026191 A CN 200910026191A CN 101576590 B CN101576590 B CN 101576590B
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Abstract
The invention relates to a miniature electric field measuring apparatus, which comprises an electric field probe, a signal simulation conditioning circuit, a data acquisition and processing circuit adopting a mixed-signal processing chip, and a data storage and transmission circuit based on ARM. The inside of the electric field probe is provided with a moving plate and a driving device thereof andtwo groups of fixed plates; the two groups of fixed plates are directly etched on a printed circuit board; and the driving device of the moving plate is a common miniature direct current motor. The p osition of the moving plate of the electric field probe is detected by acquiring fluctuating signals generated in phase change of an electrode of the direct current motor. The outputs of the two groups of moving plates are taken as the input of the mixed-signal processing chip after being amplified by two paths of alternating current, the input is subjected to internal programmable gain amplification and then directly performs alternating current difference sampling, and the peak value and the polarity of the electric field are detected by software detection. An acquired electric field value is transmitted to an intelligent storage card for storage or to a terminal computer in a wired or wireless mode. The miniature electric field measuring apparatus has the advantages of simple structure,inhibition of temperature drift, strong electromagnetic interference resistance, and wide dynamic range and high precision in measurement.
Description
One, technical field
The present invention relates to a kind of miniature electric field measurement mechanism, particularly a kind of miniature electric field measuring apparatus that is used for the atmospheric electric field measurement.
Two, background technology
The existing instrument that is used for the electrostatic field measurement mainly adopts rotary electric field appearance (claiming a mill appearance again), is to utilize metallic conductor in electric field, can measure electric field intensity in principle of its surface generation induced charge.Because electrostatic field is a gradual amount, for obtaining continuous electric field measurement value, need measure with dynamic method, promptly let conductor in electric field, alternately expose and shield.Fixed sensor conductor is called stator, and the motion conduct that stator is played alternately shielding action is called moving plate, and the brush of moving plate and ground connection rubs and ground connection.In order to enlarge the range of application of electrostatic field appearance, for example be used to measure aerial atmospheric electric field, need be with the electric field instrument miniaturization.
Prior art is in order to judge the polarity of electric field, needs physical construction and circuit that the moving plate position synchronous detects, and implementation method has two kinds usually: i.e. photoelectric detection method and stepping motor localization method.The former has increased the complicacy of Machine Design, and the latter must adopt the step motor drive moving plate, and control circuit and control program are complicated, and cost is high.The stepping motor rotating speed is slow simultaneously, can cause the reduction of electric field probe sensitivity.
Prior art adopts brush ground connection on motor reel, brush uses for a long time and can wear and tear, and occurs loose contact easily, thereby measuring-signal can be shaken.
Three, summary of the invention
In view of the problem of above-mentioned proposition, the object of the present invention is to provide and a kind ofly realize not having ground brush, no photoelectricity synchronous detection, simple in structure, volume is little, with low cost, the measurement miniature electric field measuring apparatus that dynamic range is big, precision is high.
The technical solution that realizes the object of the invention is: a kind of miniature electric field measuring apparatus comprises the electric field probe, signal imitation modulate circuit, the data acquisition of adopting the mixed signal process chip and the treatment circuit that are used to obtain electric field signal, based on data storage and the transmission circuit of ARM.Said device is sent to the electric field value of gathering intelligent storage card for storage or is sent to terminal computer through wired or wireless mode.Be provided with moving plate and drive unit thereof and two groups of stators in the said electric field probe, said two groups of stators directly are etched on the printed circuit board, and the drive unit of said moving plate is the universal miniature direct current motor.The fluctuating signal that said device produces when gathering the commutation of direct current motor electrode detects the moving plate position of electric field probe.
Principle of the present invention is: conductor can produce induced charge in electric field; Utilize the rotating metallic blade (moving plate) of non-ground connection alternately to block fixing sheet metal (stator); On stator, can produce charge Q (t) and voltage V (t), through measuring charge Q (t) or voltage V (t), with regard to the energy measurement electrostatic field.During the design stator, stator is divided into two groups, every group shape, big or small consistent with rotor becomes staggered sector structure.Driving moving plate with universal miniature low-voltage direct motor rotates.When moving plate rotated, two groups of stators were alternately blocked, and exchanged output and were sampled by difference A/D, and the difference that measures electric charge or voltage is directly proportional with tested electric field.
The present invention compared with prior art, its remarkable advantage is:
1. the stator of electrostatic field measurement mechanism is divided into two groups of sector structure, strikes a bargain, constitute the difference input, suppress common mode interference and temperature and float for shape.Totally 12 of two groups of stators; Every group 6, such structure is corresponding with 6 phase places of 3 pairs of magnetic poles of motor, and modulated electric field signal and motor current fluctuating signal are synchronous; Can judge the relative position of moving plate and stator according to the motor current fluctuating signal exactly, obtain positional information.Reduced the required isolated plant and the circuit of polarity of special judgement electric field.
2. two groups of stators directly are etched on the printed circuit board, simple in structure, handling ease, precision is high, and cost is low, has saved the required space of independent stator, is convenient to the microminiaturization of measurement mechanism.And owing on the printed circuit board insullac is arranged, such stator has moistureproof preferably dust reduction capability.
3. adopt the mixed signal process chip that functions such as built-in programmable amplifier, difference A/D sampling, software detection are arranged, enlarged range, simplified circuit structure, reduce system bulk, the reliability of enhanced system.
4. adopt the power of universal miniature low-voltage direct motor as moving plate, volume is little, and cost is low.Because signal adopts the difference input mode, does not need brush ground connection.
5. carry out data processing, storage and transmission with small-sized ARM7 system, be convenient to application data.
Four description of drawings
Fig. 1 is the stator structural representation of electric field instrument electric field probe of the present invention.
Fig. 2 is the moving plate structural representation of electric field instrument electric field probe of the present invention.
Fig. 3 is the structural representation of electric field instrument electric field probe of the present invention.
Fig. 4 is an electric field instrument principle of work block diagram of the present invention.
Fig. 5 is electric field signal conditioning of the present invention and amplification circuit diagram.
Direct supply pulsation of current signal extracting circuit figure when Fig. 6 is direct motor drive of the present invention and motor rotation.
Fig. 7 be motor of the present invention when rotating direct supply pulsation of current signal amplify and filtering circuit figure.
Five embodiments
Below in conjunction with accompanying drawing, specify embodiment of the present invention.
In conjunction with Fig. 1; Two groups of stator rotational symmetry of the present invention are etched on the circular printed circuit board [15]; Two groups of stators become staggered sector structure, and wherein the electric connection of stator [1,3,5,7,9,11] is the A group, and the electric connection of stator [2,4,6,8,10,12] is the B group.
In conjunction with Fig. 2, the moving plate of electric field probe of the present invention [13] is made with scale copper.
In conjunction with Fig. 3, the moving plate of electric field probe of the present invention [13] is installed on the main shaft [14] of motor, and is coaxial with the printed circuit board that is etched with two groups of stators [15].
In conjunction with Fig. 4; The electric field signal of electric field probe A group stator of the present invention, the induction of B group stator is connected to AIN0.0, the AIN0.1 mouth of mixed signal process chip C8051F020 respectively through the two-way ac amplifier circuit; After the amplification able to programme of chip internal; Directly the difference sample circuit by inside carries out the A/D conversion, carries out the numerical value detection by CPU again.When motor drives electric field probe moving plate rotates; Because motor rotates the relative position that the direct supply pulsation of current signal P1.0 mouth A/D sampling input CPU of input C8051F020 after filtering, interchange are amplified that causes is used to judge moving plate and stator, to judge the polarity of tested electric field.Thereby obtain tested electric field magnitude and polarity.The electric field value that records is accomplished the storage and the transmission of measurement data through the P0.0 of C8051F020, P0.1, the P0.2 mouth of P0.1 mouth input LPC2132 by LPC2132.Wherein LPC2132 is the ARM7 chip.
In conjunction with Fig. 5; The amplification and the filtering of the current/voltage-converted circuit that the electric field signal of electric field probe A of the present invention group stator, the induction of B group stator constitutes via amplifier OP1A and OP2A respectively; Pass through the AC coupling of capacitor C 19, C20 more respectively, import AIN0.0, the AIN0.1 mouth of C8051F020 mixed signal process chip respectively.
In conjunction with Fig. 6, when the P1.16 of LPC2132 mouth output low level, power switch transistor T2 conducting actuating motor; Close motor during the output high level.The LC antiresonant circuit of in the electric electromechanics resource loop, having connected, its resonance frequency equals the commutating frequency of motor electrode, the pulsation of current signal when rotating in order to extract motor.
In conjunction with Fig. 7; Pulsation of current signal when the motor that extracts rotates is coupled through C4; Second order capacitance-resistance LPF through R2, C5, R3, C6; The amplification of the amplifying circuit that constitutes through triode T3, again through the second order capacitance-resistance LPF of R8, C9, R9, C10, the P1.0 mouth of input C8051F020 mixed signal process chip.
Claims (3)
1. miniature electric field measuring apparatus comprises the electric field probe, universal miniature direct current motor, signal imitation modulate circuit, the data acquisition of adopting the mixed signal process chip and the treatment circuit that are used to obtain electric field signal, based on data storage and the transmission circuit of ARM; Described data storage and transmission circuit based on ARM is sent to electric field value intelligent storage card for storage or is sent to terminal computer through wired or wireless mode; Be provided with moving plate and drive unit thereof and two groups of stators in the said electric field probe, it is characterized in that: said two groups of stators directly are etched on the printed circuit board, and the drive unit of said moving plate is the universal miniature direct current motor; The fluctuating signal that said miniature electric field measuring apparatus produces when gathering said miniature cocurrent electromotor electrode commutation detects the moving plate position of electric field probe; The moving plate of described electric field probe is made up of coaxial 6 sectors that are installed in same surface level and mutual symmetry; The shape of each sector, big or small identical; The shape of two groups of stators is identical with moving plate with area, and these two groups of stators are etched on the printed circuit board interlacedly.
2. miniature electric field measuring apparatus as claimed in claim 1; It is characterized in that: with the output of two groups of stators respectively through exchange amplify after as the input of mixed signal process chip; Directly carry out the AC differential sampling after the programmable-gain amplification by chip internal again, detect the peak value and the polarity of electric field through the software detection.
3. miniature electric field measuring apparatus as claimed in claim 1 is characterized in that: described mixed signal process chip has programmable-gain amplification, multichannel difference A/D translation function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910026191A CN101576590B (en) | 2009-04-03 | 2009-04-03 | Miniature electric field measuring apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910026191A CN101576590B (en) | 2009-04-03 | 2009-04-03 | Miniature electric field measuring apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN101576590A CN101576590A (en) | 2009-11-11 |
| CN101576590B true CN101576590B (en) | 2012-10-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200910026191A Expired - Fee Related CN101576590B (en) | 2009-04-03 | 2009-04-03 | Miniature electric field measuring apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2532599C1 (en) * | 2013-07-30 | 2014-11-10 | Федеральное государственное бюджетное учреждение Научно-производственное объединение "Тайфун" | Electrical field intensity measurement device |
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| CN101713797B (en) * | 2009-11-23 | 2011-06-29 | 山东农业大学 | Non-contact insect charge-measuring system |
| CN101949980A (en) * | 2010-09-03 | 2011-01-19 | 兰州大学 | Vibrating reed type electric field admeasuring apparatus |
| CN102879650B (en) * | 2012-09-29 | 2015-05-27 | 兰州大学 | Intelligent range-adjustable sandstorm electric field measuring system based on shielded probe |
| CN103675948A (en) * | 2013-12-31 | 2014-03-26 | 北京维天信气象设备有限公司 | Automatic weather station |
| CN104215837A (en) * | 2014-10-05 | 2014-12-17 | 廖小雄 | Thunder and lightning pre-warning safety monitoring device |
| CN105301368A (en) * | 2015-09-25 | 2016-02-03 | 江苏绿扬电子仪器集团有限公司 | High-speed data acquisition system based on ARM |
| CN105676008B (en) * | 2016-01-15 | 2020-04-14 | 中国电力科学研究院 | Digital electric field sensor |
| CN106370940A (en) * | 2016-08-17 | 2017-02-01 | 云南电网有限责任公司电力科学研究院 | Method and system for detecting the average electric field in atmosphere |
| CN108627708A (en) * | 2017-03-22 | 2018-10-09 | 中国电力科学研究院 | The implementation method of based on WLAN impact electric field measurement system |
| CN108196134A (en) * | 2018-01-24 | 2018-06-22 | 中国电力科学研究院有限公司 | A kind of power frequency electric field measuring system and method |
| CN108445306A (en) * | 2018-03-29 | 2018-08-24 | 哈尔滨理工大学 | A kind of electric field measurement system and its application method based on FPGA controls |
| CN111025034B (en) * | 2019-11-27 | 2021-11-02 | 中国船舶重工集团有限公司第七一0研究所 | Underwater electric field signal active detection circuit and detection method |
| CN112067909A (en) * | 2020-06-28 | 2020-12-11 | 中国电力科学研究院有限公司 | Electric field sensor with differential double-probe structure and method and system for measuring synthetic electric field of electric field sensor |
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| US5315232A (en) * | 1991-01-03 | 1994-05-24 | Stewart Michael F | Electric field measuring system |
| CN2281541Y (en) * | 1996-12-24 | 1998-05-13 | 中国科学院兰州高原大气物理研究所 | Downward electric field instrument |
| CN2311003Y (en) * | 1997-11-11 | 1999-03-17 | 中国科学院兰州高原大气物理研究所 | Spheric air electric field apparatus |
| CN101324674A (en) * | 2007-06-15 | 2008-12-17 | 香港理工大学 | Electric field instrument and electric field measurement method |
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2009
- 2009-04-03 CN CN200910026191A patent/CN101576590B/en not_active Expired - Fee Related
Patent Citations (4)
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|---|---|---|---|---|
| US5315232A (en) * | 1991-01-03 | 1994-05-24 | Stewart Michael F | Electric field measuring system |
| CN2281541Y (en) * | 1996-12-24 | 1998-05-13 | 中国科学院兰州高原大气物理研究所 | Downward electric field instrument |
| CN2311003Y (en) * | 1997-11-11 | 1999-03-17 | 中国科学院兰州高原大气物理研究所 | Spheric air electric field apparatus |
| CN101324674A (en) * | 2007-06-15 | 2008-12-17 | 香港理工大学 | Electric field instrument and electric field measurement method |
Non-Patent Citations (1)
| Title |
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| 王军 何玉堂.基于C8051F的船舶水下电场测量仪研制.《中国修船》.2006,第19卷8-10. * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2532599C1 (en) * | 2013-07-30 | 2014-11-10 | Федеральное государственное бюджетное учреждение Научно-производственное объединение "Тайфун" | Electrical field intensity measurement device |
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| CN101576590A (en) | 2009-11-11 |
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Granted publication date: 20121024 Termination date: 20130403 |