CN204008823U - Contactless charged identification electroscope - Google Patents
Contactless charged identification electroscope Download PDFInfo
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- CN204008823U CN204008823U CN201420437214.0U CN201420437214U CN204008823U CN 204008823 U CN204008823 U CN 204008823U CN 201420437214 U CN201420437214 U CN 201420437214U CN 204008823 U CN204008823 U CN 204008823U
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Abstract
Contactless charged identification electroscope, comprises voltage signal sensor, and described voltage signal sensor gathers the voltage signal on high-voltage charged body; The filtering circuit being connected with described voltage signal sensor; The signal acquisition module being connected with described filtering circuit, described signal acquisition module comprises connected successively amplifying circuit, low-pass filter circuit, A/D convertor circuit, 50Hz filtering circuit, half-wave rectifying circuit and the circuit of averaging, described amplifying circuit is connected with described filtering circuit, described in the circuit of averaging be connected with following control module; With the control module that described signal acquisition module is connected, described control module is connected with low-pass filter circuit with described amplifying circuit respectively; With the signal transmission module that described control module is connected, described signal transmission module is connected with external treatment terminal, and signal is transferred to external treatment terminal.The utility model can improve electrical verification accuracy, reduces the impact that external interference causes signal accuracy.
Description
Technical field
The utility model belongs to electroscopy equipment technical field, relates in particular to a kind of for to detecting the whether charged electroscopes of electrified body such as power transmission line.
Background technology
It is the important means of grasping grid equipment ruuning situation, discovery in time and treatment facility defect that charging equipment is overhauled.According to the regulation of electric power safety working regulation, on the electrical equipment having a power failure in part, work or dead line job site attaching ground wire before, first electrical verification, the true no-voltage of identification equipment or circuit.Electroscope is for detection of whether there being one of common tool of voltage on power equipment.By electroscope, clearly verify by repair apparatus and but carry out again other operation after no-voltage, can prevent band electrical grounding wire, touch the serious accidents such as electric equipment by mistake and occur.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 collection signal, can 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.
Summary of the invention
The purpose of this utility model is to provide a kind of contactless charged identification electroscope that can improve electrical verification accuracy.
To achieve these goals, the utility model is taked following technical solution:
Contactless charged identification electroscope, comprising: voltage signal sensor, and described voltage signal sensor gathers the voltage signal on high-voltage charged body; The filtering circuit being connected with described voltage signal sensor; The signal acquisition module being connected with described filtering circuit, described signal acquisition module comprises connected successively amplifying circuit, low-pass filter circuit, A/D convertor circuit, 50Hz filtering circuit, half-wave rectifying circuit and the circuit of averaging, described amplifying circuit is connected with described filtering circuit, described in the circuit of averaging be connected with following control module; With the control module that described signal acquisition module is connected, described control module is connected with low-pass filter circuit with described amplifying circuit respectively; With the signal transmission module that described control module is connected, described signal transmission module is connected with external treatment terminal, and signal is transferred to external treatment terminal.
Further, described voltage signal sensor is differential type field strength measurement sensor.
Further, described filtering circuit 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.
Further, 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.
Further, described signal transmission module comprises electrical to optical converter, optical fiber and is arranged at the photoelectric commutator on processing terminal.
Electroscope of the present utility model gathers voltage signal by voltage signal sensor, by filtering circuit, undertaken after filtering, be sent to signal gathering unit and carry out signal processing, simultaneously, by control module, the amplifying circuit in signal gathering unit and low-pass filter circuit are controlled, according to the gain of voltage range signalization and change signal cutoff frequency, thereby improve stability and the precision of signal, while having overcome in prior art non-contact type electricity checking device collection signal, be easily subject to external interference, the defect that accuracy is not high.
Accompanying drawing explanation
Fig. 1 is the circuit block diagram of the utility model embodiment;
Fig. 2 is the circuit theory diagrams of the utility model induction module;
Fig. 3 is the circuit theory diagrams of the utility model filtration module;
Fig. 4 is the block diagram of the utility model signal transmission module;
Fig. 5 is that the utility model electrical verification detects schematic diagram.
Below in conjunction with accompanying drawing and each embodiment, the utility model is further described.
Embodiment
As shown in Figure 1, electroscope of the present utility model comprises voltage signal sensor 1, filtering circuit 2, signal acquisition module 3, control module 4 and the signal transmission module 5 connecting successively.The voltage signal that voltage signal sensor 1 gathers on high-voltage charged body, after filtering circuit 2 filtering, sending 3 pairs of signals of signal acquisition module to carries out analog to digital conversion and becomes digital signal, by control module 4, be sent to signal transmission module 5, signal transmission module 5 is sent to outside processing terminal by signal output, by processing terminal, according to signal data, analyzed, thereby whether differentiate electrified body charged.External treatment terminal is computer, or mobile intelligent terminal, for example, panel computer, smart mobile phone or the personal digital assistant (PDA) of operating system is installed.
Voltage signal sensor 1 of the present utility model is for detection of the magnitude of voltage of each measurement point vertical interval in the measuring route of power transmission line below.As shown in Figure 2, voltage signal sensor 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 voltage signal sensor space of living in.Voltage signal sensor 1 of the present utility model adopts the differential type field strength measurement sensor of selling on market.
Voltage signal sensor 1 is connected with filtering circuit 2, and the voltage signal sensing is sent to filtering circuit 2, by 2 pairs of voltage signals that receive of filtering circuit, carries out filtering high frequency clutter.As shown in Figure 3, the filtering circuit 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.
Filtering circuit 2 is connected with signal acquisition module 3, and signal acquisition module 3 comprises amplifying circuit 3-1, low-pass filter circuit 3-2, A/D convertor circuit 3-3,50Hz filtering circuit 3-4, half-wave rectifying circuit 3-5 and the circuit 3-6 that averages connecting successively.Filtering circuit 2 sends signal to amplifying circuit 3-1, amplifying circuit 3-1 amplifies the voltage signal sensing, through amplifying signal, through low-pass filter circuit 3-2, 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 3-3 and is converted to digital signal, digital signal is carried out filtering for the third time through 50Hz filtering circuit 3-4, other compositions of filtering, extract power frequency component, power frequency component is eliminated negative value through half-wave rectifying circuit 3-5, then be sent to the circuit 3-6 that averages, the sampled value of quantity is set in the circuit 3-6 that averages storage, then calculate the mean value of these sampled values, thereby obtain a stable power frequency component value, finally this signal is delivered to control module 4.
The operation of control module 4 control signal signal acquisition module 3, the control module of the present embodiment adopts the single-chip microcomputer that model is C8051F3XX.Control module 4 is connected with the low-pass filter circuit 3-2 of signal acquisition module 3, by feedback control signal 1, thus the clutter of the cutoff frequency filtering different frequency of change low-pass filter circuit, the stability of raising signal; Control module 4 is also connected with the amplifying circuit 3-1 of signal acquisition module 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 |
Control module 4 receives after the signal value of zones of different, judges the affiliated scope of voltage, by feedback control signal 2, controls the gain size of amplifying circuit, improves the resolution of AD.
As shown in Figure 4, the signal transmission module 5 of the present embodiment comprises electrical to optical converter 5-1, optical fiber 5-2 and is arranged at the photoelectric commutator 5-3 on processing terminal.Electrical to optical converter 5-1 carries out electric light conversion to the signal of control module 4 outputs, then by optical fiber 5-2 and photoelectric commutator 5-3, to processing terminal, transmits data.The signal transmission module 2 of the present embodiment is comprised of (light/electricity) signal converter and optical fiber, the electric signal that voltage signal sensor 1 is detected is converted to light signal, by RS232 agreement, by optical fiber, transmitted, to reduce other interference in data transmission procedure, improve transmission range.
Below the course of work of the present utility model is described:
While carrying out electrical verification detection, measurement point is distributed on the measuring route a perpendicular to power transmission line bearing of trend, along arrow x direction in Fig. 5, measurement point is measured, voltage signal sensor 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 filtering circuit 2 filtering, signal is outputed to signal acquisition module 3, 3 pairs of signals of signal acquisition module amplify, filtering, analog to digital conversion and averaging, digital signal is outputed to control module 4, control module 4 sends to processing terminal by signal by optical fiber, by processing terminal, according to the data that collect, carry out computational analysis, finally obtain charged recognition result.
By specific embodiment, the utility model is had been described in detail above, but, technical conceive of the present utility model is not limited in above-described embodiment, can also obtain many different concrete schemes according to design of the present utility model, for example, previous embodiment adopts optical fiber to carry out data transmission at voltage signal inductor and processing terminal, but also can adopt, carries out data transmission as communications such as WiFi, GPRS, bluetooths, or the serial communication mode such as USB is carried out data transmission; Signal acquisition module can be six independent hardware circuits, or the integrated chip of aforementioned circuit; Within all should being included in the scope described in claim such as these changes and equivalent transformation.
Claims (5)
1. contactless charged identification electroscope, is characterized in that, comprising:
Voltage signal sensor, described voltage signal sensor gathers the voltage signal on high-voltage charged body;
The filtering circuit being connected with described voltage signal sensor;
The signal acquisition module being connected with described filtering circuit, described signal acquisition module comprises connected successively amplifying circuit, low-pass filter circuit, A/D convertor circuit, 50Hz filtering circuit, half-wave rectifying circuit and the circuit of averaging, described amplifying circuit is connected with described filtering circuit, described in the circuit of averaging be connected with following control module;
With the control module that described signal acquisition module is connected, described control module is connected with low-pass filter circuit with described amplifying circuit respectively;
With the signal transmission module that described control module is connected, described signal transmission module is connected with external treatment terminal, and signal is transferred to external treatment terminal.
2. contactless charged identification electroscope according to claim 1, is characterized in that: described voltage signal sensor is differential type field strength measurement sensor.
3. contactless charged identification electroscope according to claim 1, is characterized in that: described filtering circuit 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.
4. contactless charged identification electroscope according to claim 1, 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.
5. contactless charged identification electroscope according to claim 1, is characterized in that: described signal transmission module comprises electrical to optical converter, optical fiber and is arranged at the photoelectric commutator on processing terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420437214.0U CN204008823U (en) | 2014-06-06 | 2014-08-04 | Contactless charged identification electroscope |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420300163.7 | 2014-06-06 | ||
| CN201420300163 | 2014-06-06 | ||
| CN201420437214.0U CN204008823U (en) | 2014-06-06 | 2014-08-04 | Contactless charged identification electroscope |
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| CN204008823U true CN204008823U (en) | 2014-12-10 |
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| CN201420437214.0U Expired - Fee Related CN204008823U (en) | 2014-06-06 | 2014-08-04 | Contactless charged identification electroscope |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104849533A (en) * | 2015-06-08 | 2015-08-19 | 国家电网公司 | High-voltage electroscope |
| CN108663564A (en) * | 2018-07-10 | 2018-10-16 | 大连理工大学 | A kind of two-in-one sensor for high voltage electroscope |
| CN112180182A (en) * | 2019-07-03 | 2021-01-05 | 国网福建省电力有限公司建设分公司 | Power frequency electric field measurement system based on Wi-Fi communication |
-
2014
- 2014-08-04 CN CN201420437214.0U patent/CN204008823U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104849533A (en) * | 2015-06-08 | 2015-08-19 | 国家电网公司 | High-voltage electroscope |
| CN104849533B (en) * | 2015-06-08 | 2017-01-18 | 国网山东省电力公司平原县供电公司 | High-voltage electroscope |
| CN108663564A (en) * | 2018-07-10 | 2018-10-16 | 大连理工大学 | A kind of two-in-one sensor for high voltage electroscope |
| CN108663564B (en) * | 2018-07-10 | 2023-09-19 | 大连理工大学 | A two-in-one sensor for high-voltage electroscopes |
| CN112180182A (en) * | 2019-07-03 | 2021-01-05 | 国网福建省电力有限公司建设分公司 | Power frequency electric field measurement system based on Wi-Fi communication |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Non contact-type charged recognition electroscope Effective date of registration: 20151109 Granted publication date: 20141210 Pledgee: Xi'an innovation financing Company limited by guarantee Pledgor: XI'AN GUANGYUAN ELECTRIC CO., LTD. Registration number: 2015990000972 |
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| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141210 Termination date: 20170804 |
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| CF01 | Termination of patent right due to non-payment of annual fee |