CN103675482A - Complex electrical field measuring system - Google Patents
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- CN103675482A CN103675482A CN201310565307.1A CN201310565307A CN103675482A CN 103675482 A CN103675482 A CN 103675482A CN 201310565307 A CN201310565307 A CN 201310565307A CN 103675482 A CN103675482 A CN 103675482A
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Abstract
The invention discloses a complex electrical field measuring system which comprises a complex electrical field sensing and measuring unit, a handset unit and a measured place grounding reference plate-type electrode. According to the system, devices of a complex electrical field can be tested simultaneously at a same measuring position, or a power frequency electric field, a direct-current electric field and an AC/DC combined complex electric field can be respectively measured in a controlled way. Thus, the function of measuring three different electric fields by a same measuring instrument is realized without a computer used as a part for achieving the measuring function, and measured date adopts wireless transmission. the method is direct and can be adopted to conveniently, effectively and accurately measure magnitude of an electric field of an electric transmission line and a convertor station in AC, DC and AC/DC parallel areas at a same measuring point, thus providing scientific data monitoring basis for transmission and transformation project environmental evaluation and research on electromagnetic environment level of AC/DC electric transmission line parallel and cross and span areas. In addition, measurements are convenient and simplified.
Description
Technical field
The present invention relates to a kind of complex electrical field measuring system, specifically a kind of complex electrical field device that can be used for measuring the generation of AC and DC transmission line of electricity, belongs to power system measuring and detection technique field.
Background technology
Along with the fast development that national grid is built, transmission line of electricity more and more approaches the region of resident's activity, and the electromagnetic environment problem that power frequency electric field, direct current total electric field etc. causes more and more causes people's concern.Power frequency electric field is the main electromagnetic environment parameter of transmission line of alternation current and transformer station, and direct current total electric field is the main electromagnetic environment parameter of DC power transmission line.Simultaneously because developed area, East China power transmission line corridor is selected difficulty, occurred exchanging, DC power transmission line is contiguous, the situation of parallel or scissors crossing, these regions, because power frequency electric field and direct current total electric field exist simultaneously, form special complex electrical field.Complex electrical field not only has the power frequency electric field of alternation, also has the DC electric field changing with ion, and complex electrical field is carried out to deep research and measurement, is the important content of carrying out AC/DC parallel region project of transmitting and converting electricity environmental impact assessment.
China's Environmental Protection Acceptance Check work that impact is evaluated, is completed for AC and DC electromagnetic environment has obtained very large effect.But the electromagnetic environment evaluation for alternating current-direct current Mixed Zone is still in the junior stage, the evaluation method that part scientific research and environmental evaluation unit propose separately can not solve influencing each other of Alternate and direct electric field, the measuring method of the power frequency electric field proposing and direct current total electric field is also not quite similar, how simultaneously same place carries out science, measures the emphasis that becomes industry research accurately complex electrical field, and environmental evaluation is played an important role.
Published Chinese invention patent < < all-weather > > (application number: 201110292725.9) disclosed, only the power frequency electric field of transmission line of electricity is tested, adopt special stent support probe, what emphasis solved is to realize round-the-clock measurement, patent of invention < < ground electric field measurement system for AC/DC parallel powerline and measuring method > > thereof (application number: be 200810224017.X) to adopt plurality of devices (as oscillograph, computing machine etc.), the solution that provides a kind of complex electrical field to measure, it not portable instrument measuring system, measuring principle is that a kind of software that utilizes that measuring-signal is carried out to spectrum analysis by software (Fourier transform) carries out disposal route to measuring-signal, computing machine plays the key effect that realizes measurement function in whole system, probe is single rotary voltmeter, at measured electric field, hour be difficult to guarantee precision, utility model patent < < alternating current-direct current complex electrical field strength meter > > (application number: be 200920246865.0) to adopt single-sensor perception electric field, by hardware circuit, realize the identification to power frequency electric field and total electric field, and adopt wired mode to connect front end and data acquisition system (DAS), in measuring process, there will be cable to connect and dismounting aspect trouble.
A kind of measuring sonde unit and hand-held set of only adopting can be realized synthetic electric field measurement system, by two kinds of electric field sensing devices, the total electric field producing when AC/DC transmission line is coexisted is tested, after processing by signal processing circuit, obtain on the spot measurement data wireless transmission measurement result, complete surveying work, without computing machine as a part that realizes measurement function, especially, also can fully guarantee the device of measuring accuracy and measurement range, not see in publication or document works.
Summary of the invention
The object of the invention is to ask a question for background technology, a kind of complex electrical field measuring system is disclosed, it is the device that can simultaneously test complex electrical field in same measuring position, or measure respectively the synthetic complex electrical field of power frequency electric field, DC electric field and alternating current-direct current by controlled manner, realize same surveying instrument and measure three kinds of not functions of same electric field, without computing machine, as a part that realizes measurement function, measurement data adopts wireless transmission.Method is direct, can be convenient, the size of the electric field in same measuring point is measured interchange, direct current and AC/DC parallel region transmission line of electricity, Converter Station efficiently and accurately, for the electromagnetic environment level in the regions such as project of transmitting and converting electricity environmental evaluation, research AC/DC transmission line are parallel, scissors crossing provides science data monitoring foundation, convenient and simplified measurement work.
Technical scheme of the present invention is: complex electrical field measuring system, comprises complex electrical field sensing and measuring unit, handset, measured place ground connection reference type plate type electrode; It is characterized in that: described complex electrical field sensing and measuring unit comprise complex electrical field sensor, signal processing circuit, the single-chip microcomputer one with A/D module, wireless communication module one and power module one;
Described complex electrical field sensor comprises the ground connection reference type plate type sensor one of perception power frequency electric field, the moving plate of the rotating shutter sensor two of perception total electric field, cutting electric field, the output synchronous moving plate of synchronizing signal and grating, drive motor; Position relationship is from top to bottom: moving plate, sensor one and sensor two, synchronous moving plate and grating, drive motor, there is the axis being arranged on vertically upward on drive motor that described moving plate, sensor one and sensor two, synchronous moving plate are connected successively from top to bottom, during described synchronous moving plate rotation, can cut grating;
Described ground connection reference type plate type electrode is that specification is the aluminium sheet of 1m * 1m * 2mm, and aluminium sheet middle part has a hole consistent with complex electrical field sensor physical dimension, and arbitrary bight of aluminium sheet is provided with ground terminal; Aluminium sheet upper surface overlaps with the upper surface of described complex electrical field sensor moving plate;
Two voltage signals of drawing from ground connection reference type plate type sensor one are connected to the A/D port of described single-chip microcomputer one successively after operational amplifier amplification, RC low-pass filtering, rectification, RC filtering; The output signal of described rotating shutter sensor two successively through amplifying, do multiplication with the synchronizing signal of grating output, obtain thering is the direct current signal of polarity, be connected to again another A/D port of described single-chip microcomputer one, the communication port of described single-chip microcomputer one (RXD, TXD) is connected with communication module one respectively;
Described handset comprises wireless communication module two, single-chip microcomputer two, touch screen demonstration, communication module three and power module two, single-chip microcomputer two shows with communication module two, touch screen respectively, communication module three is connected, and power module two shows and communication module three power supplies to described wireless communication module two, single-chip microcomputer two, touch screen respectively;
Radio communication mutually between described wireless communication module one and wireless communication module two, described wireless communication distance is not less than 50m; Described communication module three is to convert the serial communication of single-chip microcomputer two to standard USB interface by CH431; Described power module one and power module two are band isolated form lithium battery modules of the single-ended input of wide region, both-end ± 5 volt output;
Standard USB interface in described communication module three, can realize with upper PC and being connected;
Described single-chip microcomputer one is ARM, and described single-chip microcomputer two is also ARM;
In described single-chip microcomputer one, be also integrated with A/D module, the resolution of described A/D module is 12 or 24;
The signal processing circuit of described complex electrical field sensing and measuring unit comprises amplitude amplifying circuit, amplitude treatment circuit and phase discriminator, and described amplitude amplifying circuit is amplified to sensor collection signal successively volt level, rectifying and wave-filtering, amplitude and after processing, is sent to the A/D module of single-chip microcomputer one; Described phase discriminator is for eliminating the electric current that forms after the ion flow sensor of space to measuring error and the judgement complex electrical field DC component polar circuit causing.
Adopt above-mentioned complex electrical field measuring system to measure a complex electrical field method, it is characterized in that:
At place to be measured, described use ground connection reference type plate type electrode is lain in a horizontal plane in to overhead 10cm place height, and reliable ground, recycling the complex electrical field value that described complex electrical field sensing and measuring unit are measured this place, each measuring point is at least measured 100 data;
Adopt statistical method to show that complex electrical field mean value is as this point measurement value;
The complex electrical field distribution measuring routing of transmission line of electricity is in line span central authorities, or two nearest base steel tower distances equate, from line wire central authorities, or start apart from the conductor spacing place of equating of the foreign minister in both sides or the utmost point, to both sides, be uniformly distributed, measuring point distance is 2m ~ 5m, measures extremely apart from outboard wire 50m place;
Measurement result is described with power frequency electric field, total electric field, according to measurement result, show whether this place of having measured meets the requirement of electric field limit value.
Complex electrical field sensing and the measuring unit principle of work of complex electrical field measuring system of the present invention are: ground connection reference type plate type sensor, rotating shutter sensor that sensor contains difference perception power frequency electric field and total electric field, and grating synchronous device, two voltage signals of drawing from ground connection reference type plate type sensor are after operational amplifier amplifies, after RC low-pass filtering, be connected with rectification circuit, then be connected with the A/D port of single-chip microcomputer one after RC filtering; Rotating shutter sensor output signal is after amplifying, do multiplication with the synchronization output signal of grating, obtain having the direct current signal of polarity, be connected with the A/D another port of single-chip microcomputer one, two communication port (RXD, TXD) of single-chip microcomputer one are connected with wireless communication module one respectively, power module one is connected with lithium battery, and lithium battery is powered to stating each unit respectively after the inductance of 100uH.
The synchro measure of complex electrical field of the present invention (containing power frequency electric field and total electric field) or realize the test respectively to power frequency electric field or DC electric field by software control; Its principle is as follows:
If the field intensity of tested complex electrical field is E, the dielectric coefficient of air is ε
0, the charge Q of sensor sensing (t) is:
Wherein:
The electric current of induction is:
In formula: A
1, A
0be respectively the induction area of earthing type sensor and rotation sensor; ω
1, ω
0be respectively power frequency angular frequency and motor rotation angle frequency.
By measuring i
e(t) can obtain complex electrical field
and DC electric field E wherein
dcwith AC field E
ac.
In complex electrical field measuring system of the present invention, according to the measurement result of complex electrical field, directly provide the decision method whether satisfying condition as follows:
Think; total electric field on power frequency electric field the impact of human body induced currents micro-its; and the controlling value of power frequency electric field is also less than the limit value of international endorsement to the induction current of human body; consider environmental protection and construction costs; this patent adopts following formula (3) to control complex electrical field, is referred to as oval control.
(3)
In above formula, E
ac, E
dcbe respectively power frequency electric field and total electric field measured value, E
acL, E
dcLbe respectively power frequency electric field and total electric field limit value.
The invention has the beneficial effects as follows:
(1) by controlling, measure respectively power frequency electric field and direct current total electric field, to realize same surveying instrument and measure three kinds of not functions of same electric field, can be convenient, the complex electrical field of measuring efficiently and accurately project of transmitting and converting electricity, or its power frequency electric field and direct current total electric field;
(2) a kind of measuring method of complex electrical field has been proposed, for the electromagnetic environment evaluation of mixed set-up, parallel laying ac and dc circuit provides foundation;
(3) proposed a kind of criterion of judging whether complex electrical field meets the demands, can directly provide measuring point region electromagnetic environment parameter level according to measurement result and whether meet related request;
(4) adopt wireless communication module, can make tester away from probe module, avoid lead-in wire or the impact of personnel's proximity effect on measurement result;
(5) preferred hand tool is for USB interface, can communicate by letter with upper PC easily, the options such as the software interface of PC unit can arrange that data read, standard queries, data query and report generation, the software that PC is installed is added up by 10 (or user arranges as required) measuring point datas, each measuring point data: 100 data of at every turn sampling, the sampling interval time can be set, and draws the distribution curve of a plurality of measuring points, to facilitate the environmental evaluation to circuit or transformer station;
(6) adopt low consumption circuit design, with lithium battery power supply, be convenient to long-time field survey and carry.
Accompanying drawing explanation
Accompanying drawing 1 is complex electrical field measuring system sensor schematic diagram of the present invention;
Accompanying drawing 2 is ground connection reference plate structure and scheme of installation;
Accompanying drawing 3 is A place enlarged drawing in Fig. 2;
Accompanying drawing 4 is for forming schematic diagram for complex electrical field measuring system of the present invention;
Accompanying drawing 5 is power frequency electric field signal processing circuit figure;
Accompanying drawing 6 is total electric field signal processing circuit figure.
Description of symbols in accompanying drawing: 1-sensor, 2-synchronous moving plate, 3-moving plate, 4-grating, 5-motor, 7-plate type electrode.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the present invention is further illustrated, but this embodiment should not be construed as the restriction to this patent, and the content not being described in detail in instructions belongs to the known prior art of professional and technical personnel in the field.
As shown in accompanying drawing 1～accompanying drawing 4, complex electrical field measuring system of the present invention, comprises complex electrical field sensing and measuring unit, handset, measured place ground connection reference type plate type electrode 7; Described complex electrical field sensing and measuring unit comprise complex electrical field sensor, signal processing circuit, the single-chip microcomputer one with A/D module, wireless communication module one and power module one.
Described complex electrical field sensor comprises that the moving plate 3 of the ground connection reference type plate type sensor one of perception power frequency electric field, the rotating shutter sensor two of perception total electric field (these two sensors are integrated into structure as shown in 1 in Fig. 1), cutting electric field is, the synchronous moving plate 2 of output synchronizing signal and grating 4, drive motor 5; Position relationship is from top to bottom: moving plate 3, sensor one and sensor two, synchronous moving plate 2 and grating 4, drive motor 5, there is the axis being arranged on vertically upward on drive motor 5 that described moving plate 3, sensor one and sensor two, synchronous moving plate 2 are connected successively from top to bottom, during described synchronous moving plate 2 rotation, can cut grating 4.
Described ground connection reference type plate type electrode 7 is that specification is the aluminium sheet of 1m * 1m * 2mm, and aluminium sheet middle part has a hole consistent with complex electrical field sensor physical dimension, and arbitrary bight of aluminium sheet is provided with ground terminal; Aluminium sheet upper surface overlaps with the upper surface of described complex electrical field sensor moving plate 3;
Two voltage signals of drawing from ground connection reference type plate type sensor one are connected to the A/D port of described single-chip microcomputer one successively after operational amplifier amplification, RC low-pass filtering, rectification, RC filtering; The output signal of described rotating shutter sensor two successively through amplifying, do multiplication with the synchronizing signal of grating output, obtain thering is the direct current signal of polarity, be connected to again another A/D port of described single-chip microcomputer one, the communication port of described single-chip microcomputer one (RXD, TXD) is connected with communication module one respectively;
Described handset comprises wireless communication module two, single-chip microcomputer two, touch screen demonstration, communication module three and power module two, single-chip microcomputer two shows with communication module two, touch screen respectively, communication module three is connected, and power module two shows and communication module three power supplies to described wireless communication module two, single-chip microcomputer two, touch screen respectively;
Radio communication mutually between described wireless communication module one and wireless communication module two, described wireless communication distance is not less than 50m; Described communication module three is to convert the serial communication of single-chip microcomputer two to standard USB interface by CH431; Described power module one and power module two are band isolated form lithium battery modules of the single-ended input of wide region, both-end ± 5 volt output;
Standard USB interface in described communication module three, can realize with upper PC and being connected;
Described single-chip microcomputer one is ARM, and described single-chip microcomputer two is also ARM;
In described single-chip microcomputer one, be also integrated with A/D module, the resolution of described A/D module is 12 or 24;
The signal processing circuit of described complex electrical field sensing and measuring unit comprises amplitude amplifying circuit, amplitude treatment circuit and phase discriminator, and described amplitude amplifying circuit is amplified to sensor collection signal successively volt level, rectifying and wave-filtering, amplitude and after processing, is sent to the A/D module of single-chip microcomputer one; Described phase discriminator is for eliminating the electric current that forms after the ion flow sensor of space to measuring error and the judgement complex electrical field DC component polar circuit causing.
The communication module three of handset is to convert single-chip microcomputer 8 serial communications to standard USB interface by CH431.Power module one, power module two are band isolated form lithium battery modules of the single-ended input of wide region, both-end ± 5 volt output.
Standard USB interface in handheld unit communication module three, can realize with upper PC and being connected, the options such as the software interface of PC unit can arrange that data read, standard queries, data query and report generation, the software that PC is installed is added up by 10 (or user arranges as required) measuring point datas, each measuring point data: 100 data of at every turn sampling, the sampling interval time can be set, and draws the distribution curve of a plurality of measuring points, to facilitate the environmental evaluation to circuit or transformer station.PC can carry out: in real time to hand-held set measurement data read and preservation, standard queries provide relevant testing standard and environment containment standard content search and demonstration, display window to show the data that transmit from electric field sensing and measuring unit unit; Data sorting window is arranged by little the data of real-time display window to large order; Scatter chart has provided the distribution curve (when corresponding a plurality of electric field sensings and measuring unit) of electric field, can understand intuitively the regularity of distribution of electric field; Data query is supported the historical measurement data that user inquires about to preserve; Report generation is realized the conclusion of one or many measurement data and is formed the test report of standard.
As shown in accompanying drawing 5, accompanying drawing 6, the signal processing circuit of complex electrical field sensing and measuring unit comprises amplitude amplifying circuit, amplitude treatment circuit and phase discriminator, the feeble signal that wherein amplitude amplifying circuit transmits sensor reaches volt level signal after 3 grades of amplifications, then becomes d. c. voltage signal through rectifying and wave-filtering; Amplitude treatment circuit makes the signal adaptation that is transferred to A/D module in A/D sampling processing for adjusting signal, and phase discriminator is for eliminating the electric current that forms after the ion flow sensor of space to measuring the error that causes simultaneously for judging the polarity of the DC component of complex electrical field.A/D module integration in single-chip microcomputer, 12 of resolution, this patent can reach the precision (can adopt the A/D of 24 further to improve resolution and measuring accuracy) of 1.2V/m in theory.Complex electrical field sensing and measuring unit major function are perception and measure power frequency and the total electric field component in complex electrical field, storage of measurement data, to metering circuit control, manipulate measurement data judges measurement result, management battery and communication module, adopt ARM, to meet the requirement to control and management.
Complex electrical field sensing and the measuring unit principle of work of complex electrical field measuring system of the present invention are: the ground connection reference type plate type sensor that sensor one contains respectively perception power frequency electric field and total electric field, also have rotating shutter sensor two, grating synchronous device, two voltage signals of drawing from sensor one are after operational amplifier amplifies, after RC low-pass filtering, be connected with rectification circuit, then be connected with the A/D port of single-chip microcomputer one after RC filtering; Sensor two output signals are after amplifying, do multiplication with grating synchronization output signal, obtain having the direct current signal of polarity, be connected with another A/D port of single-chip microcomputer one, the communication port of single-chip microcomputer one (RXD, TXD) is connected with wireless communication module one respectively, power module one is connected with lithium battery, and lithium battery is powered to stating each unit respectively after the inductance of 100uH.
In complex electrical field measuring system work of the present invention practical application, method of operating is as follows:
1, by hand-held set, the test of complex electrical field, power frequency electric field and total electric field can be set.Enter after corresponding test function option, first measurement parameter (is measured to number of times, the time interval, Measuring Time etc.) arrange, after arranging, test, hand-held set automatic searching complex electrical field sensing and measuring unit, and judge this sensing and measuring unit state, according to parameters, measure, measure carry out in data and progress bar display measurement progress, can be to data analysis, arrangement and storage after having tested.Hand-held set is supported the inquiry of testing standard.When connecting PC, upper computer software is identified hand-held set automatically, and can need to transmit test data according to user.
2, ground connection reference type plate type electrode 7 is combined use with complex electrical field sensing with measuring unit, and sensing is overlapped with plate type electrode 7 upper surfaces with moving plate 3 upper surfaces on measuring unit, by the earthing device on plate type electrode 7, is connected with measured place the earth.
3,, according to the measurement result of complex electrical field, directly provide the decision method whether satisfying condition and be described below:
Think; total electric field on power frequency electric field the impact of human body induced currents micro-its; and the controlling value of power frequency electric field is also less than the limit value of international endorsement to the induction current of human body; consider environmental protection and construction costs; the present invention adopts following formula to control complex electrical field, is referred to as oval control.
In above formula, Eac, Edc is respectively power frequency electric field and total electric field measured value, EacL, EdcL is respectively power frequency electric field and total electric field limit value.
The options such as the data that arrange the software interface of PC unit read, standard queries, data query and report generation.Data read in real time the reading and preserving of hand-held set measurement data, and standard queries provides relevant testing standard and environment containment standard content search and demonstration, and display window shows from measurement data; Sequence window is arranged by little data to large order; Scatter chart has provided the distribution curve (during corresponding a plurality of complex electrical field probe) of electric field, can understand intuitively the regularity of distribution of electric field; Data query is supported the historical measurement data that user inquires about to preserve; Report generation is realized the conclusion of one or many measurement data and is formed the test report of standard.
During measurement, the measuring point height of the electric field measurement of transmission line of electricity, transformer station is 10cm above the ground, spacing can be set arbitrarily, be generally 2m～5m, the line wire of take is middle is starting point, surveys (or outside current conversion station enclosure wall) 50m place to the subpoint of (utmost point) wire ground stop or measure to zone of reasonableness according to actual conditions to both sides order.
The software of installing on PC is added up by 10 (or user arranges as required) measuring point datas, and draws the distribution curve of a plurality of measuring points, to facilitate the environmental evaluation to circuit or transformer station.
Power module adopts low consumption circuit design, with lithium battery power supply, is convenient to long-time field survey and carries.
Claims (2)
1. complex electrical field measuring system, comprises complex electrical field sensing and measuring unit, handset, measured place ground connection reference type plate type electrode; It is characterized in that: described complex electrical field sensing and measuring unit comprise complex electrical field sensor, signal processing circuit, the single-chip microcomputer one with A/D module, wireless communication module one and power module one;
Described complex electrical field sensor comprises the ground connection reference type plate type sensor one of perception power frequency electric field, the moving plate of the rotating shutter sensor two of perception total electric field, cutting electric field, the output synchronous moving plate of synchronizing signal and grating, drive motor; Position relationship is from top to bottom: moving plate, sensor one and sensor two, synchronous moving plate and grating, drive motor, there is the axis being arranged on vertically upward on drive motor that described moving plate, sensor one and sensor two, synchronous moving plate are connected successively from top to bottom, during described synchronous moving plate rotation, can cut grating;
Described ground connection reference type plate type electrode is that specification is the aluminium sheet of 1m * 1m * 2mm, and aluminium sheet middle part has a hole consistent with complex electrical field sensor physical dimension, and arbitrary bight of aluminium sheet is provided with ground terminal; Aluminium sheet upper surface overlaps with the upper surface of described complex electrical field sensor moving plate;
Two voltage signals of drawing from ground connection reference type plate type sensor one are connected to the A/D port of described single-chip microcomputer one successively after operational amplifier amplification, RC low-pass filtering, rectification, RC filtering; The output signal of described rotating shutter sensor two successively through amplifying, do multiplication with the synchronizing signal of grating output, obtain thering is the direct current signal of polarity, be connected to again another A/D port of described single-chip microcomputer one, the communication port of described single-chip microcomputer one (RXD, TXD) is connected with communication module one respectively;
Described handset comprises wireless communication module two, single-chip microcomputer two, touch screen demonstration, communication module three and power module two, single-chip microcomputer two shows with communication module two, touch screen respectively, communication module three is connected, and power module two shows and communication module three power supplies to described wireless communication module two, single-chip microcomputer two, touch screen respectively;
Radio communication mutually between described wireless communication module one and wireless communication module two, described wireless communication distance is not less than 50m; Described communication module three is to convert the serial communication of single-chip microcomputer two to standard USB interface by CH431; Described power module one and power module two are band isolated form lithium battery modules of the single-ended input of wide region, both-end ± 5 volt output;
Standard USB interface in described communication module three, can realize with upper PC and being connected;
Described single-chip microcomputer one is ARM, and described single-chip microcomputer two is also ARM;
In described single-chip microcomputer one, be also integrated with A/D module, the resolution of described A/D module is 12 or 24;
The signal processing circuit of described complex electrical field sensing and measuring unit comprises amplitude amplifying circuit, amplitude treatment circuit and phase discriminator, and described amplitude amplifying circuit is amplified to sensor collection signal successively volt level, rectifying and wave-filtering, amplitude and after processing, is sent to the A/D module of single-chip microcomputer one; Described phase discriminator is for eliminating the electric current that forms after the ion flow sensor of space to measuring error and the judgement complex electrical field DC component polar circuit causing.
2. adopt complex electrical field measuring system to measure a complex electrical field method, it is characterized in that:
At place to be measured, described use ground connection reference type plate type electrode is lain in a horizontal plane in to overhead 10cm place height, and reliable ground, recycling the complex electrical field value that described complex electrical field sensing and measuring unit are measured this place, each measuring point is at least measured 100 data;
Adopt statistical method to show that complex electrical field mean value is as this point measurement value;
The complex electrical field distribution measuring routing of transmission line of electricity is in line span central authorities, or two nearest base steel tower distances equate, from line wire central authorities, or start apart from the conductor spacing place of equating of the foreign minister in both sides or the utmost point, to both sides, be uniformly distributed, measuring point distance is 2m ~ 5m, measures extremely apart from outboard wire 50m place;
Measurement result is described with power frequency electric field, total electric field, according to measurement result, show whether this place of having measured meets the requirement of electric field limit value.
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| CN105182255A (en) * | 2015-10-10 | 2015-12-23 | 国网电力科学研究院武汉南瑞有限责任公司 | Rotary AC power transmission line magnetic field measuring apparatus |
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| CN104502733A (en) * | 2014-12-26 | 2015-04-08 | 清华大学 | Optical measuring system used for measuring field intensity of direct-current electric field |
| CN104502733B (en) * | 2014-12-26 | 2017-04-05 | 清华大学 | A kind of optical measuring system for DC electric field field strength measurement |
| 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 |
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