CN104076195A - Non-contact electricity verification device based on vertical field intensity difference distribution curve matching - Google Patents
Non-contact electricity verification device based on vertical field intensity difference distribution curve matching Download PDFInfo
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Abstract
A non-contact electricity verification device based on vertical field intensity difference distribution curve matching comprises a signal collecting unit, a data analysis unit and a signal transmission unit used for signal transmission between the signal collection unit and the data analysis unit. The signal collection unit comprises a sensing module, a filter module, a collection module and a collection control module, wherein the sensing module is used for measuring voltage signals of measured points on a measured path, and the voltage signals are filtered by the filter module in a low-pass mode, then transmitted to the collection module for analog-digital conversion and transmitted out through the collection control module. The data analysis unit comprises a display module, a man-machine interaction module, a data storage module and a control module. The data analysis unit stores a standard map and generates a measurement curve by calculation according to actual measurement data, matching recognition is carried out on the measurement curve and the standard map, and the electrification situation is judged. Whether an object to be tested is powered on or not can be judged by detecting the electric field intensity of the measured path, the operation process is simplified, and detection accuracy is improved.
Description
Technical field
The invention belongs to charging equipment electrical verification technical field in electric system, thereby relate in particular to, a kind ofly based on vertical electric field intensity difference distribution curve, carry out the Multi-purpose non-contact electricity tester that Graphic Pattern Matching is realized electrified body electrical verification.
Background technology
Electroscope is a kind of for detection of the whether charged instrument of object.According to national regulation, high voltage electroscope must be tested having electric circuit or have on the equipment that corresponding conditions is provided before use, confirms that high voltage electroscope work after good carries out the electrical verification of high-tension line to detect again.Investigate the evidence of a case power mode and classify, electroscope can be divided into contact electroscope and non-contact type electricity checking device.Wherein, non-contact type electricity checking device, because operation can directly not contact with object under test time, becomes study hotspot gradually.The principle of work of non-contact type electricity checking device is based on the measurement of power-frequency electric field strength is carried out to threshold values triggering, thereby whether judgment object is charged, by signal designation, has been sent electricity or has been ceased without telecommunications, is widely used at present the electrical verification of the dangerous objects such as high-tension electricity.
The patent No. is that 200910060796.9 Chinese invention patent discloses a kind of 1000kv extra-high voltage AC non-contact type electricity checking method and electroscope, this patent adopts the inductive electromagnetic method of capacitance induction principle to carry out electrical verification, electroscope carries out data acquisition with the frequency of 10KHz, reference value using the electric field intensity value of the working position collecting as electrical verification, according to the field intensity curve of space electric field and variation tendency, carry out electrical verification, by the sound and optic signal frequency speed of reporting to the police, reflect the size of electric field.Described in this patent, galvanoscopic alarming threshold value is by site test repeatedly, according to the variation tendency of electric field, choose and obtain, galvanoscopic usable range and accuracy have been improved to a certain extent, but because the charging equipment of transformer station and current conversion station is many, interference between charging equipment is larger, cause charging equipment formate field intensity around complicated and changeable, during electrical verification, may be subject to larger interference, therefore electroscope reference value and obtaining of alarming threshold value are easily subject to external interference, to accuracy, also can exert an influence.
Publication number is that the Chinese invention patent application of 101833046A discloses a kind of extra high-voltage AC non-contact distance-measuring type electricity testing method, the method adopts the electrical verification of parallel plate capacitor method principle of induction, its alarming threshold value is also by electroscope, with certain frequency, to be carried out the electric field intensity of data acquisition electroscope working position, and the value obtaining according to multi collect is chosen and formed; Then measure the distance between electroscope and wire, the distance value obtaining show that according to the curve of the field intensity of space electric field and variation tendency corresponding field intensity value is as electricity testing value; Finally alarming threshold value and electricity testing value are compared, the warning by sound and optic signal reflects that whether testee is charged.The method is owing to must actual measurement going out the distance value between electroscope and wire, and at this electricity-testing method of real work occasion, must make the distance of instrument and wire in an effective scope, and this electrical verification process must take multiple measurements same transmission line of electricity, and operating process is comparatively numerous and diverse.
Summary of the invention
For obtaining of reference value and alarming threshold value in non-contact type electricity checking device in prior art, be easily subject to external interference, accuracy is not high, and need to take multiple measurements the problem that causes operating process comparatively numerous and diverse to same circuit, the object of the present invention is to provide a kind of Multi-purpose non-contact electricity tester that carries out Graphic Pattern Matching based on vertical electric field intensity difference distribution curve.
To achieve these goals, the present invention takes following technical solution:
Multi-purpose non-contact electricity tester based on vertical strength different cloth Curve Matching, for transmission line of electricity is carried out to charged identification, comprising: signal gathering unit, data analysis unit and the signal transmission unit that carries out signal transmission between described signal gathering unit and described data analysis unit, described signal gathering unit comprises induction module, filtration module, acquisition module and the acquisition control module connecting successively, described induction module detects the voltage signal that is positioned at each measurement point vertical interval in measuring route, after described filtration module low-pass filtering, deliver to described acquisition module and carry out analog to digital conversion, by described acquisition control module, transferred out, described data analysis unit comprises display module connected to one another, human-computer interaction module, data memory module and control module, described data analysis unit stores the vertical strength different cloth of the emulation as the standard diagram curve that emulation obtains, and the data that obtain according to signal gathering unit are calculated generation measurement curve, measurement curve is mated to identification with standard diagram, if the minimum value of measuring curve is greater than the minimum threshold values of setting, simultaneously, the simulation curve of measuring the differing heights of curve and corresponding types transmission line of electricity is carried out to variance calculating, using in standard diagram with the simulation curve of variance yields minimum of measuring curve as match curve, the variance of measuring the field intensity difference of curve and the field intensity difference of match curve is less than variance threshold values, indicate electricity, when measuring the variance of the field intensity difference of curve and the field intensity difference of match curve, be less than variance threshold values, and the minimum value of measuring curve is less than minimum threshold values, represent not charged, display module shows electrical verification result.
Technical scheme is more specifically, and described filtration module forms low-pass filter by two electric capacity of common mode inductance two ends cross-over connection, the electric capacity at two ends two voltage dependent resistor (VDR)s respectively in parallel.
Technical scheme is more specifically, and described acquisition module is by amplifying circuit, low-pass filter circuit, A/D convertor circuit, 50Hz filtering circuit, half-wave rectifying circuit and the electric circuit constitute of averaging.
Technical scheme is more specifically, described acquisition control module is connected with amplifying circuit with the low-pass filter circuit of described acquisition module respectively, by feedback control signal, change the cutoff frequency of low-pass filter circuit, by feedback control signal, change the enlargement factor of amplifying circuit to signal.
Technical scheme is more specifically, the gain of described amplifying circuit, according to gathered voltage signal scope setting, is divided into three region: 0～10mv, 10mv～100mv and 100mv～2.5v by voltage data, amplifying circuit gain corresponding to described three regions is respectively 128,16 and 1.
Technical scheme is more specifically, the signal transmission unit of described the present embodiment comprises electrooptic conversion module, optical fiber and photoelectric conversion module, the signal that described electrooptic conversion module will transmit to data analysis unit signal gathering unit carries out electric light and converts light signal to, then by optical fiber, between signal gathering unit and data analysis unit, carried out data transmission, before light signal imports data analysis unit into, described photoelectric conversion module carries out opto-electronic conversion by light signal and becomes electric signal.
Technical scheme is more specifically, and described data analysis unit is computer or mobile intelligent terminal.
Technical scheme is more specifically, described measuring route is the straight line perpendicular to transmission line of electricity bearing of trend, described measuring route is apart from ground certain altitude, and point extends to phase conductor outside, power transmission line roadside to both sides centered by transmission line of electricity center, even some measurement points spaced apart in measuring route.
Technical scheme is more specifically, and described standard diagram comprises the vertical strength different cloth of the emulation of the differing heights that dissimilar transmission line of electricity is corresponding curve.
Technical scheme is more specifically, described standard diagram comprises the vertical electric field intensity difference distribution curve corresponding from different electric pressures of highly fixing emulation transmission line of electricity below measuring route, the height of emulation transmission line of electricity and the height of transmission line of electricity to be measured of standard diagram are consistent, simulated measurement path is consistent with distance and the distance between actual measurement path and ground between ground, and emulation transmission line of electricity type is consistent with transmission line of electricity type to be measured.
Electroscopic device setting of the present invention stores the data analysis unit of standard diagram, by sensing unit, measured the magnitude of voltage of each measurement point vertical interval in the measuring route of transmission line of electricity below, data analysis unit is calculated to generate according to measured value and is measured curve, measurement curve is mated to calculating with standard diagram, thereby obtain electrical verification result.The present invention just can judge by detecting the electric field intensity difference of measurement point vertical interval in the measuring route of transmission line of electricity below whether object under test has electricity, around the formate field intensity around of larger the caused charging equipment of interference between the charging equipment such as transformer station and current conversion station is complicated and changeable to have avoided transmission line of electricity, and electrical verification is produced to harmful effect, also avoided the repeatedly measurement to transmission line of electricity, greatly simplify the operation course, improved accuracy of detection.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the embodiment of the present invention;
Fig. 2 is the circuit theory diagrams of induction module of the present invention;
Fig. 3 is the circuit theory diagrams of filtration module of the present invention;
Fig. 4 is the circuit block diagram of acquisition module of the present invention and acquisition control module;
Fig. 5 is the structured flowchart of data analysis unit of the present invention;
Fig. 6 is the demonstration schematic diagram of embodiment of the present invention display module;
Fig. 7 is that electrical verification of the present invention detects schematic diagram.
Below in conjunction with accompanying drawing, the present invention is described in more detail with each embodiment.
Embodiment
As shown in Figure 1, the Multi-purpose non-contact electricity tester of the embodiment of the present invention comprises signal gathering unit 1, signal transmission unit 2 and data analysis unit 3, the voltage signal that signal gathering unit 1 gathers on high-voltage charged body, by signal transmission unit 2, be sent to data analysis unit 3, by data analysis unit 3, according to signal data, analyzed, thereby whether differentiate electrified body charged.
The signal gathering unit 1 of Multi-purpose non-contact electricity tester is comprised of the induction module 1-1 connecting successively, filtration module 1-2, acquisition module 1-3 and acquisition control module 1-4, during signal gathering unit 1 work, induction module 1-1 gathers the voltage signal of high-voltage charged body, after filtering after module 1-2 low-pass filtering, deliver to acquisition module 1-3 and carry out analog to digital conversion and become digital signal, by acquisition control module 1-4, be sent to signal transmission unit 2 and transmit.
Induction module 1-1 is for detection of the magnitude of voltage of each measurement point vertical interval in the measuring route of power transmission line to be measured below.As shown in Figure 2, induction module 1-1 gathers the voltage signal of electrified body according to electromagnetic induction principle, by the pressure drop at measuring resistance R two ends, calculates the magnitude of voltage in induction module space of living in.Induction module 1-1 of the present invention can adopt the differential type field strength measurement sensor of selling on market.
Filtration module 1-2 is for carrying out filtering high frequency clutter to the voltage signal receiving, as shown in Figure 3, the filtration module 1-2 of the present embodiment forms low-pass filter by common mode inductance L two ends cross-over connection two capacitor C 1, C2, high frequency clutter is removed, the electric capacity at two ends respectively two voltage dependent resistor (VDR) R1, R2 in parallel can stop the high pressure of moment to pass through, the damage that preventing is for example struck by lightning causes instrument.
The voltage signal that acquisition module 1-3 senses for acquisition process induction module 1-1, as shown in Figure 4, the acquisition module 1-3 of the present embodiment is by amplifying circuit, low-pass filter circuit, A/D convertor circuit, 50Hz filtering circuit, half-wave rectifying circuit and the electric circuit constitute of averaging.Amplifying circuit amplifies the voltage signal sensing, through amplifying signal, through low-pass filter circuit, carry out secondary filtering, filtering high-frequency signal, again improve the precision of signal, signal after filtering carries out analog to digital conversion by A/D convertor circuit and is converted to digital signal, digital signal is carried out filtering for the third time through 50Hz filtering circuit, other compositions of filtering, extract power frequency component, power frequency component is eliminated negative value through half-wave rectifying circuit, then be sent to the circuit of averaging, the circuitry stores of averaging is set the sampled value of quantity, then calculate the mean value of these sampled values, thereby obtain a stable power frequency component value, finally this signal is delivered to acquisition control module 1-4.
Acquisition control module 1-4 is used for controlling the operation of acquisition module 1-3, and by RS232 interface, data is sent to data analysis unit 3 by signal transmission unit 2.The acquisition control module of the present embodiment adopts the single-chip microcomputer that model is C8051F3XX, acquisition control module 1-4 is connected with the low-pass filter circuit of acquisition module 1-3, by feedback control signal 1, thereby change the clutter of the cutoff frequency filtering different frequency of low-pass filter circuit, improve the stability of signal; Acquisition control module 1-4 is connected with the amplifying circuit of acquisition module 1-3 simultaneously, by feedback control signal 2, changes the enlargement factor of amplifying circuit to signal, thereby improves the conversion accuracy of A/D convertor circuit, improves the resolution of AD.More specifically, the present embodiment arranges the gain of amplifying circuit according to gathered voltage signal scope, the voltage data of collection is divided into three regions, be respectively 0～10mv, 10mv～100mv and 100mv～2.5v, amplifying circuit gain corresponding to these three regions is respectively 128,16 and 1, and corresponding relation is as shown in the table:
| Voltage range | 0～10mv | 10mv～100mv | 100mv～2.5v |
| Amplifier gain | 128 | 16 | 1 |
When acquisition control module 1-4 receives the signal value of zones of different, judge the affiliated scope of voltage, by feedback control signal 2, control the gain size of amplifying circuit, improve the resolution of AD.
The signal transmission unit 2 of the present embodiment comprises electrooptic conversion module 2-1, optical fiber 2-2 and photoelectric conversion module 2-3.The signal that electrooptic conversion module 2-1 will transmit to data analysis unit 3 signal gathering unit 1 carries out electric light conversion, then by optical fiber 2-2, between signal gathering unit 1 and data analysis unit 3, carry out data transmission, before the light signal of optical fiber 2-2 transmission imports data analysis unit 3 into, photoelectric conversion module 2-3 carries out opto-electronic conversion by light signal, is then sent to data analysis unit 3.The signal transmission unit 2 of the present embodiment is comprised of (light/electricity) signal conversion module and optical fiber, data between sensing unit 1 and data analysis unit 3 are transmitted by RS232 agreement, the electric signal that sensing unit 1 is detected is converted to light signal, can reduce other interference in data transmission procedure, improve transmission range, optical fiber plays transmission data.
Data analysis unit 3 receives after data, and the data in the data that collect and simulation data base are analyzed, and judges charged situation.As shown in Figure 5, data analysis unit 3 of the present invention comprises display module 3-1 connected to one another, human-computer interaction module 3-2, data memory module 3-3, process chip 3-4.Data analysis unit 3 of the present invention can adopt computer, or mobile intelligent terminal, for example, panel computer, smart mobile phone or the personal digital assistant (PDA) of operating system is installed.The display module 3-1 of data analysis unit 3 is for display analysis result; Human-computer interaction module 3-2 is for operator's input operation order, and human-computer interaction module 3-2 can be mouse, keyboard, or touch display screen; Data memory module 3-3 detects data, electrical verification result and as the emulated data figure of electrical verification standard diagram for storing; Process chip 3-4 is for sending instruction to signal gathering unit 1, to control the operation of electroscopic device, according to the data analysis collecting, judge simultaneously, and show electrical verification result via display module, in process chip 3-4, be provided with for data being carried out to the electrical verification calculating sub module of computational analysis.
Take below and adopt panel computer the present invention will be further described as example as data analysis unit 3.The display screen of panel computer is the display module of the present embodiment data analysis unit 3, also be the human-computer interaction module of the present embodiment simultaneously, the hard disk of panel computer is data memory module, on panel computer, store the emulated data figure of the horizontal field strength distribution of differing heights in the certain limit of the parallel three kinds of transmission lines of electricity of single tower single loop, common-tower double-return road and two-way when charged, when carrying out actual measurement, measurement range must be consistent with the emulation scope of aforementioned three kinds of transmission lines of electricity.As shown in Figure 6, when electrical verification detects, on panel computer, show following 4 regions: model selection district I, display field II, drawing district III and control zone IV.In model selection district I, user selects the transmission line of electricity identical with electrical verification actual conditions, while being common-tower double-return road power transmission line as power transmission line to be measured, need select in model selection region corresponding pattern, electroscopic device can be analyzed the charged situation of corresponding transmission line of electricity according to actual conditions, input minimum threshold values A and variance threshold values B simultaneously, if the minimum value of the measurement curve that the measured value collecting according to sensing unit 1 is drawn is greater than minimum threshold values A, simultaneously, the simulation curve of measuring the differing heights under curve and this pattern carries out variance calculating, using in standard diagram with the simulation curve of variance yields minimum of measuring curve as match curve, when measuring the variance of the field intensity difference of curve and the field intensity difference of match curve, be less than variance threshold values B, indicate electricity.The electric field value of display field II real-time display measurement point when measuring.Drawing district III can be drawn out the electric field curve in measurement range when measuring simultaneously; Control zone IV can be adjusted back the measurement data being kept in data analysis unit 3, and analyzes whether its corresponding transmission line of electricity is charged.
The course of work of the present invention is as follows:
After start, first the acquisition control module 1-4 of electroscopic device detects the state of acquisition module 1-3, if acquisition module 1-3 is normal, and while receiving the operating instruction of data analysis unit 3, relay indicating light is not Chang Liang, and when receiving the operating instruction of data analysis unit 3, relay indicating light glimmers with 0.5Hz; When if acquisition module 1-3 is undesired, relay indicating light is with the frequency scintillation of 48Hz, and rub-out signal is sent to data analysis unit 3 by signal transmission unit 2.
With reference to Fig. 7, while carrying out electrical verification detection, measurement point is distributed in (in Fig. 7, direction shown in arrow x is direction of measurement) on the straight line perpendicular to power transmission line bearing of trend, this straight line is measuring route a, measuring route a is apart from ground certain altitude, and centered by wire center, point extends to phase conductor outside, power transmission line roadside to both sides, and some measurement points are evenly distributed on measuring route a.Along arrow x direction, measurement point is measured, the induction module 1-1 of sensing unit 1 induces the magnitude of voltage at each measurement point vertical interval d two ends in measuring route according to electromagnetic induction principle, then by filtration module 1-2 filtering, signal is outputed to acquisition module 1-3, acquisition module 1-3 is by inner secondary filtering and amplification and analog to digital conversion, simulating signal is converted to digital signal and outputs to acquisition control module 1-4, acquisition control module 1-4 sends to data analysis unit 3 by signal by optical fiber, data analysis unit 3 is controlled the operation of whole electroscopic device by RS232 agreement, and store the emulated data figure of the measuring route of dissimilar transmission line of electricity under corresponding height, data analysis unit 3 calculates vertical electric field intensity difference corresponding to measurement point vertical interval according to the magnitude of voltage at the measurement point vertical interval d two ends that collect, according to the vertical electric field strength difference measuring, calculate the vertical strength different cloth curve (measurement curve) that generates measuring route, the measurement curve that actual measurement is obtained carries out variance calculating with the transmission line of electricity of respective type in database and the simulation curve of corresponding measuring route, using in standard diagram with the simulation curve of variance yields minimum of measuring curve as match curve, when measuring the variance of the field intensity difference of curve and the field intensity difference of match curve, be less than variance threshold values B, and when the minimum value of measuring curve is greater than minimum threshold values A, represent that this transmission line of electricity has electricity.Variance threshold values B determines according to measuring empirical value under actual standard environment, and minimum threshold A determines with reference to the dependent thresholds in high voltage display device national standard, is 15% of the rated voltage field intensity mean value of match curve.
When transmission line of electricity height is determined, the electric pressure by power transmission line determines perpendicular to the poor distribution curve of the vertical field intensity on the straight line (measuring route) of the distance ground certain altitude of transmission line of electricity bearing of trend for transmission line of electricity below, when the electric pressure of power transmission line is determined, the poor distribution curve of vertical field intensity of the measuring route of its distance ground, below certain altitude is confirmable.The present invention is first by the mode of simulation calculation, simulate the vertical strength different cloth curve of differing heights, different electric pressures under various transmission lines of electricity, using the simulation curve obtaining as the standard diagram for contrasting, be stored in the data analysis unit 3 of electroscopic device; Then by sensing unit 1, each measurement point in corresponding measuring route is measured, the voltage measuring value at measurement point vertical interval two ends in measuring route is sent to data analysis unit 3, the electrical verification calculating sub module of data analysis unit 3 is by calculating the vertical strength different cloth curve of transmission line of electricity to be measured, measure curve, and the standard diagram that the measurement curve that actual measurement is obtained obtains with the emulation being stored in data analysis unit mates identification, thereby judge that whether transmission line of electricity is charged.
Electrical verification calculating sub module coupling identification step is: determine the data length of measuring curve, and carry out the disposal of gentle filter to measuring curve and standard diagram; By long process such as the simulation curve of measuring curve and standard diagram carry out; To measuring curve, carry out left and right translation, the simulation curve of measuring curve and standard diagram is carried out to Waveform Matching, make to measure curve consistent with waveform and the phase place of simulation curve in standard diagram; To measuring the simulation curve of curve and standard diagram, carry out variance calculating, calculate successively each simulation curve and the difference of measuring curve in standard diagram, using in standard diagram with the simulation curve of variance yields minimum of measuring curve as match curve, when the variance of the measurement field intensity difference of curve and the field intensity difference of match curve is less than variance threshold values, and the minimum value of measuring curve is greater than minimum threshold values, think that this transmission line of electricity to be measured is charged, the virtual voltage of power transmission line to be measured is the magnitude of voltage corresponding with this match curve; When measuring the field intensity difference of curve, be less than variance threshold values with the variance of the field intensity difference of match curve, and the minimum value of measurement curve is less than minimum threshold values, thinks that this transmission line of electricity to be measured is not charged; When the variance of the measurement field intensity difference of curve and the field intensity difference of match curve is greater than variance threshold values, to think and measure curve not in the scope of standard diagram, it is invalid that this measures curve, need re-start measurement.
More specifically, can adopt the method for first difference post-sampling to long process such as the simulation curve of standard diagram carry out according to the data length of measuring curve, the simulation curve that makes to measure curve and standard diagram be isometric.During translation measurement curve, find out the mistiming Δ t that measures the crest of each simulation curve in the crest of curve and standard diagram, thereby determine the phase differential of measuring curve and each simulation curve, according to the maximum time difference Δ t that measures the crest of curve and the crest of each simulation curve
maxand the length N of data is determined maximum range of translation MAX=Δ t
max/ TN, T is wherein the voltage signal cycle, and 1～MAX point of each translation of measurement curve left and right made to curve waveform alignment.Adopt Euclidean distance Furthest Neighbor to calculate each simulation curve and the difference of measuring curve in standard diagram.Standard diagram of the present invention comprises the vertical electric field intensity difference distribution curve corresponding from different electric pressures of highly fixing emulation transmission line of electricity below measuring route, the height of emulation transmission line of electricity and the height of transmission line of electricity to be measured of standard diagram are consistent, simulated measurement path is consistent with distance and the distance between actual measurement path and ground between ground, and emulation transmission line of electricity type is consistent with transmission line of electricity type to be measured.
Electroscopic device of the present invention has been realized the electrical verification of contactless ultra high-tension transmission line, guaranteed staff's safety, and in electroscopic device, store the poor emulation distribution curve of the vertical field intensity of transmission line of electricity, by the measurement point in corresponding situation, carry out field strength measurement, the measurement curve calculating according to measured value is mated to identification with simulation curve, can remove from prior art and need same circuit to take multiple measurements numerous and diverse step that just can obtain reference value, and standard diagram of the present invention obtains by emulation experiment, can reduce the interference of external environment, improve accuracy.
Really, technical conceive of the present invention is not limited in above-described embodiment, can also obtain many different concrete schemes according to design of the present invention, for example, previous embodiment adopts optical fiber between sensing unit and data analysis unit, to carry out data transmission, but also can adopt, carry out data transmission as communications such as WiFi, GPRS, bluetooths, or the serial communication mode such as USB carries out data transmission, within all should being included in the scope described in claim such as these changes and equivalent transformation.
It will be appreciated by those skilled in the art that, module and the circuit in conjunction with embodiment disclosed herein, described, can realize with electronic hardware, computer software or the combination of the two, for example, acquisition module can be comprised of 6 hardware circuits realizing corresponding function, or the function of low-pass filter circuit, 50Hz filtering circuit, half-wave rectifying circuit and the circuit of averaging adopts (single-chip microcomputer) software programming to realize.For the interchangeability of hardware and software is clearly described, the composition of each example has been described according to function in the above description in general manner.These functions are carried out with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.Professional and technical personnel realizes described function with distinct methods in the time of can specifically should being used for to each, but this realization should not thought and exceeds scope of the present invention.
The software module that module, the circuit of describing in conjunction with embodiment disclosed herein can directly use hardware, processor to carry out, or the combination of the two is implemented.Software module can be placed in random access memory (RAM), internal memory, ROM (read-only memory) (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or the known any other forms of storage medium of technical field.
Claims (10)
1. the Multi-purpose non-contact electricity tester based on vertical strength different cloth Curve Matching, for transmission line of electricity is carried out to charged identification, it is characterized in that, comprising: signal gathering unit, data analysis unit and the signal transmission unit that carries out signal transmission between described signal gathering unit and described data analysis unit;
Described signal gathering unit comprises induction module, filtration module, acquisition module and the acquisition control module connecting successively, described induction module detects the voltage signal that is positioned at each measurement point vertical interval in measuring route, after described filtration module low-pass filtering, deliver to described acquisition module and carry out analog to digital conversion, by described acquisition control module, transferred out;
Described data analysis unit comprises display module connected to one another, human-computer interaction module, data memory module and process chip, described data analysis unit stores the vertical strength different cloth of the emulation as the standard diagram curve that emulation obtains, and the data that signal gathering unit obtains are calculated generation measurement curve, measurement curve is mated to identification with standard diagram, if the minimum value of measuring curve is greater than the minimum threshold values of setting, simultaneously, the simulation curve of measuring the differing heights of curve and corresponding types transmission line of electricity is carried out to variance calculating, using in standard diagram with the simulation curve of variance yields minimum of measuring curve as match curve, the variance of measuring the field intensity difference of curve and the field intensity difference of match curve is less than variance threshold values, indicate electricity, when measuring the variance of the field intensity difference of curve and the field intensity difference of match curve, be less than variance threshold values, and the minimum value of measuring curve is less than minimum threshold values, represent not charged, display module shows electrical verification result.
2. the Multi-purpose non-contact electricity tester based on vertical strength different cloth Curve Matching according to claim 1, it is characterized in that: described filtration module forms low-pass filter by two electric capacity of common mode inductance two ends cross-over connection the electric capacity at two ends two voltage dependent resistor (VDR)s respectively in parallel.
3. the Multi-purpose non-contact electricity tester based on vertical strength different cloth Curve Matching according to claim 1, is characterized in that: described acquisition module is by amplifying circuit, low-pass filter circuit, A/D convertor circuit, 50Hz filtering circuit, half-wave rectifying circuit and the electric circuit constitute of averaging.
4. the Multi-purpose non-contact electricity tester based on vertical strength different cloth Curve Matching according to claim 3, it is characterized in that: described acquisition control module is connected with amplifying circuit with the low-pass filter circuit of described acquisition module respectively, by feedback control signal, change the cutoff frequency of low-pass filter circuit, by feedback control signal, change the enlargement factor of amplifying circuit to signal.
5. the Multi-purpose non-contact electricity tester based on vertical strength different cloth Curve Matching according to claim 4, it is characterized in that: the gain of described amplifying circuit is according to gathered voltage signal scope setting, voltage data is divided into three region: 0～10mv, 10mv～100mv and 100mv～2.5v, amplifying circuit gain corresponding to described three regions is respectively 128,16 and 1.
6. the Multi-purpose non-contact electricity tester based on vertical strength different cloth Curve Matching according to claim 1, it is characterized in that: described signal transmission unit comprises electrooptic conversion module, optical fiber and photoelectric conversion module, the signal that described electrooptic conversion module will transmit to data analysis unit signal gathering unit carries out electric light and converts light signal to, then by optical fiber, between signal gathering unit and data analysis unit, carried out data transmission, before light signal imports data analysis unit into, described photoelectric conversion module carries out opto-electronic conversion by light signal and becomes electric signal.
7. the Multi-purpose non-contact electricity tester based on vertical strength different cloth Curve Matching according to claim 1, is characterized in that: described data analysis unit is computer or mobile intelligent terminal.
8. the Multi-purpose non-contact electricity tester based on vertical strength different cloth Curve Matching according to claim 1, it is characterized in that: described measuring route is the straight line perpendicular to transmission line of electricity bearing of trend, described measuring route is apart from ground certain altitude, and point extends to phase conductor outside, power transmission line roadside to both sides centered by transmission line of electricity center, even some measurement points spaced apart in measuring route.
9. the Multi-purpose non-contact electricity tester based on vertical strength different cloth Curve Matching according to claim 1, is characterized in that: described standard diagram comprises the vertical strength different cloth of the emulation of the differing heights that dissimilar transmission line of electricity is corresponding curve.
10. according to the Multi-purpose non-contact electricity tester based on vertical strength different cloth Curve Matching described in claim 1 or 9, it is characterized in that: described standard diagram comprises the vertical electric field intensity difference distribution curve corresponding from different electric pressures of highly fixing emulation transmission line of electricity below measuring route, the height of emulation transmission line of electricity and the height of transmission line of electricity to be measured of standard diagram are consistent, simulated measurement path is consistent with distance and the distance between actual measurement path and ground between ground, and emulation transmission line of electricity type is consistent with transmission line of electricity type to be measured.
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| CN107741521A (en) * | 2017-11-30 | 2018-02-27 | 福州大学 | Three-phase system non-contact type high voltage is powered to judge instruction device and its method |
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Inventor after: Li Jiwen Inventor after: Wang Fengfei Inventor after: Li Dexing Inventor after: Liu Jin Inventor after: Zhang Zhiqiang Inventor after: Dong Wenjuan Inventor after: Chen Xianyong Inventor after: Xu Jian Inventor after: Zhong Mingliang Inventor after: He Yiping Inventor after: Wang Sheng Inventor after: Yu Long Inventor after: Zhang Yanchun Inventor after: Zhang Bo Inventor before: Liu Jin Inventor before: Zhang Zhiqiang Inventor before: Dong Wenjuan Inventor before: Li Jiwen Inventor before: Zhong Mingliang Inventor before: Xu Jian Inventor before: Chen Xianyong Inventor before: Wang Sheng |
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Effective date of registration: 20151224 Address after: 830011 No. 155 West Jiangsu Road, the Xinjiang Uygur Autonomous Region, Urumqi Patentee after: XINJIANG POWER TRANSMISSION AND TRANSFORMATION ENGINEERING Co. Patentee after: XI'AN GUANGYUAN ELECTRIC Co.,Ltd. Address before: 710065 Xi'an science and technology zone, Shaanxi high tech Road No. five, No. 22 Patentee before: XI'AN GUANGYUAN ELECTRIC Co.,Ltd. Patentee before: XINJIANG POWER TRANSMISSION AND TRANSFORMATION ENGINEERING Co. |
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