CN102360042A - All-weather power-frequency electric field measuring device - Google Patents
All-weather power-frequency electric field measuring device Download PDFInfo
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- CN102360042A CN102360042A CN2011102927259A CN201110292725A CN102360042A CN 102360042 A CN102360042 A CN 102360042A CN 2011102927259 A CN2011102927259 A CN 2011102927259A CN 201110292725 A CN201110292725 A CN 201110292725A CN 102360042 A CN102360042 A CN 102360042A
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Abstract
The invention relates to an all-weather power-frequency electric field measuring device which comprises at least a power-frequency electric field probe unit, at least a noninsulated specially-made bracket, a handset unit and a PC (personal computer), wherein each probe unit is supported by a bracket; each power-frequency electric field probe unit is composed of a sensor, a signal processing circuit, a first SCM (single chip microcomputer), a first communication module, an A/D (analog to digital) chip and a first power module; the handset unit is composed of a second communication module, a second SCM, a display screen, an operating keyboard and a second power module; and the first communication module of each power-frequency electric field probe unit is respectively connected with the second communication module of the handset unit, and the handset unit is connected with the PC by the second SCM. The all-weather power-frequency electric field measuring device provided by the invention can be used in all-weather conditions, can eliminate the personnel-proximity effect caused by short lines in the process of measurement, and eliminate the influence of relative humidity on measurement results.
Description
Technical field
The present invention relates to a kind of line-frequency electric field measuring device, belong to AC input transformation engineering electromagnetic environment field, particularly a kind of AC field measurement mechanism that can be used for all weather conditions use.
Background technology
China's power grid construction is fast-developing in recent years, and more and more near the movable zone of resident, its electromagnetic environment problem more and more causes people's attention in the transmission line of alternation current.Power frequency electric field is the main electromagnetic environment parameter of transmission line of alternation current and transformer station, along with China to the carrying out of project of transmitting and converting electricity environmental impact assessment work, to the monitoring of power frequency electric field, become an important process.
At present, the power frequency electric field test in China's electromagnetic environment influence evaluation, the environmental Protection Acceptance Check work, the test in the research work that R&D institution carries out, what adopt mostly is the floating type capacitance coupling type surveying instrument that insulating support supports.The use of this quasi-instrument has comparatively strict test environment requirement, such as method of testing and surveying instrument require instrument in relative humidity less than working below 80%.And in actual use, because limitation of field condition, a lot of human observer are tested behind rain, in the light rain, cause measurement result to depart from normal range, cause unnecessary misunderstanding or even dispute.In addition; The traditional measurement device needs stube cable or optical cable to carry out reading; For example application number is 88109177.4 application for a patent for invention " space line-frequency electric field measuring device "; Introduce a kind of space line-frequency electric field measuring device that belongs to the High-Voltage Test Technology field, form by sensor, optical fiber and receiver.The defective that line-frequency electric field measuring device had of this structure is: cause survey crew usually to influence measurement result because of the range observation probe segment.
In view of this, be necessary to provide a kind of and can be used for that all weather conditions uses, and can eliminate in measuring process because of contiguous influence of the short personnel that cause of line, elimination relative humidity is to the round-the-clock line-frequency electric field measuring device of the influence of measurement result.
Summary of the invention
The objective of the invention is: a kind of device wireless transmission, that can under all weather conditions, carry out the power frequency electric field test that adopts is provided; Eliminate the influence of relative humidity to measurement result; Avoid occurring existing surveying instrument and install the phenomenon that the measurement numerical value that when relative humidity is big, occurs exceeds normal value; Realize the round-the-clock measurement of power frequency electric field, and eliminate in measuring process because of the contiguous influence of the short personnel that cause of line.
Technical scheme of the present invention is: a kind of round-the-clock line-frequency electric field measuring device, comprise at least one power frequency electric field contact unit, at least one nonisulated special support, handset and PC, and it is characterized in that:
Said at least one power frequency electric field contact unit is corresponding one by one with said at least one nonisulated special support, and promptly each contact unit is by a stent support;
Each power frequency electric field contact unit is made up of sensor, signal processing circuit, first single-chip microcomputer, first communication module, A/D chip and first power module; The output terminal of sensor links to each other with the signal processing circuit input end respectively; The output terminal of signal processing circuit links to each other with the A/D chip with first single-chip microcomputer respectively; The A/D chip other end links to each other with first single-chip microcomputer; First single-chip microcomputer links to each other with first communication module again, and first power module links to each other with first single-chip microcomputer, A/D chip, first communication module respectively;
Said handset is made up of second communication module, second singlechip, display screen, operation keyboard and second source module; Second singlechip links to each other with second communication module, display screen, operation keyboard and second source module respectively, and the second source module provides power supply for second singlechip, second communication module;
First communication module of each power frequency electric field contact unit is connected with second communication module of handset respectively, and handset links to each other with PC through second singlechip.
Aforesaid round-the-clock line-frequency electric field measuring device is characterized in that, said sensor is parallel-plate or ball-type sensor, said nonisulated special support reliable ground.
Aforesaid round-the-clock line-frequency electric field measuring device is characterized in that, said first and second communication modules are serial communication modular or wireless communication module.
The invention has the beneficial effects as follows: the device that can under all weather conditions, carry out the power frequency electric field test; Eliminate the influence of relative humidity to measurement result; Avoid occurring existing surveying instrument and exceed the phenomenon of normal value when relative humidity is big, and eliminate in measuring process because of the contiguous influence of the short personnel that cause of line with the measurement numerical value that device occurs.Adopt line-frequency electric field measuring device of the present invention, can measure the size of the electric field of AC input transformation engineering convenient, efficiently and accurately, for AC input transformation engineering-environment evaluation, research transmission line of electricity electromagnetic environment level etc. provides science data monitoring foundation.Simultaneously, electric field measurement device of the present invention adopts total digitalization to show, has friendly man-machine interface, is a kind of line-frequency electric field measuring device that function of statistic analysis is arranged.
Description of drawings
Fig. 1 is the line-frequency electric field measuring device circuit block diagram of the embodiment of the invention.
Fig. 2 is the probe circuit schematic diagram of the line-frequency electric field measuring device of the embodiment of the invention.
Fig. 3 is the probe amplitude treatment circuit of the line-frequency electric field measuring device of the embodiment of the invention.
Fig. 4 is the line-frequency electric field measuring device support figure of the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is done further detailed description, but this embodiment should not be construed as limitation of the present invention.
The line-frequency electric field measuring device that the embodiment of the invention provides comprises: at least one power frequency electric field contact unit (slave computer unit), handset (host computer unit) and PC (Fig. 1; Optional); The communication module of every power frequency electric field contact unit links to each other through wireless with the communication module of handset respectively, and the single-chip microcomputer of hand-held set links to each other with PC.Described power frequency electric field contact unit is made up of sensor, signal processing circuit, single-chip microcomputer, communication module, A/D chip and power module; The output terminal of sensor links to each other with the signal processing circuit input end respectively; The output terminal of signal processing circuit links to each other with the A/D chip with single-chip microcomputer respectively; The A/D chip other end links to each other with single-chip microcomputer, and single-chip microcomputer links to each other with communication module again, and power module links to each other with single-chip microcomputer, A/D chip, communication module respectively.Described handset is made up of communication module, single-chip microcomputer, display screen, operation keyboard and power module, and single-chip microcomputer links to each other with PC with communication module, display screen, operation keyboard and power module respectively, and power module links to each other with communication module.
Like Fig. 2 and shown in Figure 3; The signal processing circuit of power frequency electric field contact unit of the present invention is made up of amplitude amplifying circuit, amplitude treatment circuit; Wherein the amplitude amplifying circuit reaches a volt level signal with the faint AC signal that sensor transmits through 10000 times of 3 grades of amplifications; Become d. c. voltage signal through rectifying and wave-filtering again, sample for the A/D chip.A/D chip: in order to improve precision; Reduce volume; This patent adopts 12 serial ports A/D conversion chip A/D7895,2.5 volts power supply benchmark is provided simultaneously, according to the measurement range of 0-50kV/m with ADR421; The present invention can reach the precision of 12V/m in theory, if will further improve the A/D chip that precision should adopt 24.Single-chip microcomputer: power frequency electric field contact unit major function is the positive-negative polarity of sampling A/D value and DC voltage, can meet the demands with the PIC2051 single-chip microcomputer.Power module: adopt the module of the band isolated form of the single-ended input both-end output of wide region, lithium battery voltage is converted into ± 5 volts of voltages are single-chip microcomputer and operational amplifier power supply.Communication module: because longest distance can reach 50m between the last power frequency electric field contact unit, so select radio communication for use.
Power frequency electric field contact unit principle of work of the present invention is: two voltage signals of drawing from sensor are after operational amplifier amplifies.Link to each other with rectification circuit through behind the RC LPF, link to each other with the crus secunda of AD7895 chip after passing through RC filtering again, 4,5,6 of AD7895 chip links to each other with p1.0, p1.1, p1.2 and the p1.3 of single-chip microcomputer with 7 pin.The RXD of single-chip microcomputer links to each other with 4 pin with 1 pin of wireless communication module respectively with the TXD end.1 pin of power module links to each other with lithium battery with 2 pin, and 6 pin of lithium battery are through linking to each other with the VCC end of single-chip microcomputer, AD7895, TL084 and communication module 485 respectively behind the inductance of 100uH, and 6 pin of lithium battery are through linking to each other with the VSS end of TL084 behind the inductance of 100uH.
Handset of the present invention mainly contains one-chip computer module, and its major function is to give PC with the data that the power frequency electric field contact unit comes, and the data of also the power frequency electric field contact unit being come in addition show on the liquid crystal of this unit, adopt 8051 as controller; Communication module has two kinds, and a kind of is wireless communication module, and communicates by letter between the power frequency electric field contact unit, and another kind is CH431, and it converts 8051 serial communication the USB interface of standard to, directly links to each other with PC; LCD interface is used for connecting liquid crystal display; Power module 7805 converts lithium battery voltage to+5V voltage, gives single-chip microcomputer, liquid crystal display and other chip power supplies.
Real-time display window on the display interface of PC of the present invention unit shows the data that transmit from power frequency electric field contact unit unit in real time; The data sorting window is pressed the data of real-time display window little of big series arrangement; Scatter chart has provided distribution curve when power frequency electric field contact unit (corresponding a plurality of) of power frequency electric field, can understand the regularity of distribution of electric field intuitively; In addition the software of PC unit time of 100 groups of data of can selecting to sample, also can the data of real-time display window, data sorting window be preserved with form.
The present invention is when measuring; The measuring point height that the power frequency electric field of circuit, transformer station is measured is 1.5m above the ground; Spacing can be set arbitrarily, is generally 5m, order survey to polar conductor floor projections point or outside the current conversion station enclosure wall 50m place only or according to actual conditions measure to zone of reasonableness.
PC installed software of the present invention is by 10 measuring point power frequency electric field measurement data statistics; Each measuring point data: 100 data of at every turn sampling; Time in SI can be set, and draws the distribution curve of a plurality of measuring points, with convenient environmental evaluation to circuit or transformer station.The present invention adopts low-power consumption motor and element in addition, uses lithium battery power supply, is convenient to long-time field survey and carries.
The content of not doing in this instructions to describe in detail belongs to this area professional and technical personnel's known prior art.
Claims (3)
1. round-the-clock line-frequency electric field measuring device comprises at least one power frequency electric field contact unit, at least one nonisulated special support, handset and PC, it is characterized in that:
Said at least one power frequency electric field contact unit is corresponding one by one with said at least one nonisulated special support, and promptly each contact unit is by a stent support;
Each power frequency electric field contact unit is made up of sensor, signal processing circuit, first single-chip microcomputer, first communication module, A/D chip and first power module; The output terminal of sensor links to each other with the signal processing circuit input end respectively; The output terminal of signal processing circuit links to each other with the A/D chip with first single-chip microcomputer respectively; The A/D chip other end links to each other with first single-chip microcomputer; First single-chip microcomputer links to each other with first communication module again, and first power module links to each other with first single-chip microcomputer, A/D chip, first communication module respectively;
Said handset is made up of second communication module, second singlechip, display screen, operation keyboard and second source module; Second singlechip links to each other with second communication module, display screen, operation keyboard and second source module respectively, and the second source module provides power supply for second singlechip, second communication module;
First communication module of each power frequency electric field contact unit is connected with second communication module of handset respectively, and handset links to each other with PC through second singlechip.
2. round-the-clock line-frequency electric field measuring device according to claim 1 is characterized in that, said sensor is parallel-plate or ball-type sensor, said nonisulated special support reliable ground.
3. round-the-clock line-frequency electric field measuring device according to claim 1 is characterized in that, said first and second communication modules are serial communication modular or wireless communication module.
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| CN2011102927259A CN102360042A (en) | 2011-09-30 | 2011-09-30 | All-weather power-frequency electric field measuring device |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675483A (en) * | 2013-12-05 | 2014-03-26 | 国网电力科学研究院武汉南瑞有限责任公司 | All-weather power frequency electric field measuring device |
| CN103954848A (en) * | 2014-04-21 | 2014-07-30 | 国家电网公司 | Portable field strength measurement device and field strength measurement method based on DSP and FPGA |
| CN104502739A (en) * | 2014-06-23 | 2015-04-08 | 南方电网科学研究院有限责任公司 | Electronic power transmission line power-frequency parameter tester resisting high induced voltage interference, and test method thereof |
| CN105158586A (en) * | 2015-09-11 | 2015-12-16 | 兰州空间技术物理研究所 | Active space electric field detection sensor built-in circuit |
| CN107449974A (en) * | 2017-09-29 | 2017-12-08 | 国网陕西省电力公司 | Distortion electric field measuring system and method below a kind of transmission line of alternation current |
| CN107462777A (en) * | 2017-09-15 | 2017-12-12 | 中国电力科学研究院 | A kind of system and method for being used to carry out multichannel power frequency electric field measurement under high humidity conditions |
| 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 |
| CN109459592A (en) * | 2018-09-25 | 2019-03-12 | 国网江西省电力有限公司电力科学研究院 | A kind of bracket improving power frequency electric field measuring instrument accuracy |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675483A (en) * | 2013-12-05 | 2014-03-26 | 国网电力科学研究院武汉南瑞有限责任公司 | All-weather power frequency electric field measuring device |
| CN103954848A (en) * | 2014-04-21 | 2014-07-30 | 国家电网公司 | Portable field strength measurement device and field strength measurement method based on DSP and FPGA |
| CN103954848B (en) * | 2014-04-21 | 2015-12-30 | 国家电网公司 | Based on portable field intensity measurement mechanism and the method for DSP and FPGA |
| CN104502739A (en) * | 2014-06-23 | 2015-04-08 | 南方电网科学研究院有限责任公司 | Electronic power transmission line power-frequency parameter tester resisting high induced voltage interference, and test method thereof |
| CN104502739B (en) * | 2014-06-23 | 2018-10-19 | 南方电网科学研究院有限责任公司 | The anti-high induction voltage interference transmission line power frequency parameter test instrument of electronic type and method |
| CN105158586A (en) * | 2015-09-11 | 2015-12-16 | 兰州空间技术物理研究所 | Active space electric field detection sensor built-in circuit |
| 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 |
| CN107462777A (en) * | 2017-09-15 | 2017-12-12 | 中国电力科学研究院 | A kind of system and method for being used to carry out multichannel power frequency electric field measurement under high humidity conditions |
| CN107449974A (en) * | 2017-09-29 | 2017-12-08 | 国网陕西省电力公司 | Distortion electric field measuring system and method below a kind of transmission line of alternation current |
| CN109459592A (en) * | 2018-09-25 | 2019-03-12 | 国网江西省电力有限公司电力科学研究院 | A kind of bracket improving power frequency electric field measuring instrument accuracy |
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Application publication date: 20120222 |