CN108132405A - Identifier is charged in a kind of distribution low-voltage outlet - Google Patents
Identifier is charged in a kind of distribution low-voltage outlet Download PDFInfo
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- CN108132405A CN108132405A CN201711289957.2A CN201711289957A CN108132405A CN 108132405 A CN108132405 A CN 108132405A CN 201711289957 A CN201711289957 A CN 201711289957A CN 108132405 A CN108132405 A CN 108132405A
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- signal
- distribution low
- voltage outlet
- unit
- voltage
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The present invention relates to power construction equipment technical fields, more specifically, it is related to a kind of distribution low-voltage outlet electrification identifier, including signal transmitter and signal receiver, during detection, signal transmitter is connected to the end of distribution low-voltage outlet, and high-frequency signal is generated by signal generating unit, high-frequency signal passes through switch drive unit and load switch control unit, to electric current of the circuit input with the high-frequency characteristic.And signal receiver is connected to the head end of distribution low-voltage outlet, signal gathering unit acquires current signal, current signal is handled by signal processing unit, if signal identification unit can identify corresponding high-frequency signal from current signal, the two distribution low-voltage leading-out terminals that can determine whether signal transmitter and signal receiver access are same conducting wire.The present invention provides a kind of special detection tools of distribution low-voltage outlet, can quickly and accurately identify distribution low-voltage outlet, and low-pressure line-outgoing identification mistake is avoided to lead to the operation loophole in Operation of Electric Systems maintenance.
Description
Technical field
The present invention relates to power construction equipment technical fields, charge and identify more particularly, to a kind of distribution low-voltage outlet
Instrument.
Background technology
In recent years, electric power market demand is increasing, the demand cumulative year after year of low-voltage cable, hidden conductor in city.
The low-pressure line-outgoing of distribution transforming few then three, four tunnels, at most more than ten tunnels, due to left over by history and the transformation of distribution low-voltage taiwan area etc., match
The low-pressure line-outgoing mark of change often malfunctions, and the low-pressure line-outgoing of distribution transforming is caused to identify inaccurate or even low pressure switch-dividing is made to be supplied to model
The mark enclosed also malfunctions, and in low pressure power failure work, is susceptible to the situation that low pressure switch-dividing disconnects but job site is still charged.
This leaves some potential safety problems to work such as operation and maintenance, the emergency first-aid repairs of electric system.
And there is major part and is all laid by buried or convert channel in the low pressure of distribution transforming, the verification work that low pressure occurs is more difficult
Expansion.In the prior art, first, being identified by wire diameter and colour of insulated conductor, but when all or part of line occurs in distribution transforming
There is the situation of docking in diameter and the identical conducting wire of color or conducting wire, are susceptible to identification mistake；Second is that utilize conducting wire first and last end
The identical principle of electric current is compared the first end current of conducting wire, and this mode is only relatively more outstanding in the electric current of conducting wire difference
It can just be accurately identified, and in practical electricity consumption when different, load is continually changing, and electric current is susceptible to larger wave
It is dynamic, accurately conducting wire can not be identified.
Invention content
The present invention provides a kind of distribution low-voltage outlet electrification and knows to overcome at least one defect described in the above-mentioned prior art
Other instrument, using the equal principle everywhere of the electric current on same circuit loop, to distribution low-voltage line end input feature vector electric current, and
It is detected in head end, can rapidly and accurately identify distribution low-voltage outlet.
The present invention is in order to solve the above technical problems, employ following technical solution：
Identifier is charged in a kind of distribution low-voltage outlet, including signal transmitter and signal receiver, is connected respectively both during detection
In the both ends of distribution low-voltage outlet；
Signal transmitter includes the first power module and the load being sequentially connected electrically, load switch control unit, switch drive list
Member and signal generating unit, load are connect with tested distribution low-voltage outlet, and the first power module is load switch control unit, opens
Close driving unit and signal generating unit power supply；
Signal receiver includes the second source module and signal gathering unit being sequentially connected electrically, signal processing unit and signal is known
Other unit, signal gathering unit are connect with tested distribution low-voltage outlet, and second source module is signal gathering unit, signal processing
Unit and the power supply of signal identification unit.
Wherein, signal transmitter is connected to the end of distribution low-voltage outlet, to distribution low-voltage outlet input feature vector electric current, letter
Number generating unit generates high-frequency signal, and high-frequency signal is sent to switch drive unit, and switch drive unit is believed according to high frequency
The switch of number control load switch control unit makes load switch control unit carry out Push And Release according to the frequency of high-frequency signal,
Make to produce the electric current for taking the high-frequency characteristic on circuit.
And signal receiver is connected to the head end of distribution low-voltage outlet, and the electric current on conducting wire is acquired by signal gathering unit
Signal is amplified and filtered to current signal by signal processing unit, will be only identical with signal transmitter tranmitting frequency
Signal send to signal identification unit and be identified, current signal is identified in signal identification unit, if can recognize that high frequency
Signal then illustrates the signal that the circuit presence signal transmitter emits, then can determine whether the distribution transforming that signal transmitter is accessed
Distribution low-voltage leading-out terminal is accessed as same conducting wire in low-pressure line-outgoing end with signal receiver.
Further, resistance is selected in load, and load switch control unit is switching tube, preferably field-effect tube；
Switch drive unit includes the triode and photoelectrical coupler of electrical connection, and photoelectrical coupler is electrically connected with switching tube；Three poles
The high-frequency pulse signal that pipe generates signal generator is amplified, photoelectrical coupler switch tube to be driven to be controlled；
Signal generating unit is microcontroller, and microcontroller is electrically connected with triode, and microcontroller is by inside programming, at work from drawing
Foot exports high-frequency pulse signal, preferably generates the high-frequency pulse signal of 3 kinds of continuous alternate cycles.
Further, signal transmitter further includes signal display unit, including frequency counter and indicator light D1, frequency dividing
Counter and the monolithic mechatronics, indicator light D1 are electrically connected with frequency counter.Frequency counter divides original frequency
It is shone afterwards with lower frequency driving indicator light D1, convenient for observing the frequency of high-frequency current exported in real time.
Preferably, signal display unit further includes indicator light D2, indicator light D3, indicator light D4, and three is electromechanical with monolithic
Connection.Microcontroller generates the high-frequency pulse signal of continuous alternate cycles in 3, indicator light D2, indicator light D3 and indicator light D4 difference
It is shown with the high-frequency pulse signal of this 3 kinds of different frequencies.
To prevent apparatus overheat, signal transmitter further includes radiator fan, and radiator fan is supplied by tested distribution low-voltage outlet
Electricity.
Further, the first power module includes sequentially connected transformer, rectification module, filtering voltage regulation module, transformation
Device is connect with tested distribution low-voltage outlet, and power supply is provided by tested distribution low-voltage outlet.Distribution low-voltage outlet is in electriferous state,
By distribution low-voltage power supply through transformer pressure-reducing, rectification module is converted to after direct current after filtering voltage regulation module filtered voltage stabilizing, letter
Other power units of number transmitter provide power supply.
Further, signal gathering unit is current transformer；Signal processing unit include electrical connection amplifying circuit and
Filter circuit, filter circuit are electrically connected with current transformer；The filtered circuit of electric current and amplifying circuit of current transformer acquisition
It is filtered and signal identification unit is transmitted to after amplifying；Signal identification unit includes the decoder being electrically connected mutually and instruction
Lamp D5, decoder are electrically connected with amplifying circuit, and decoder carries out frequency identification to current signal, and are passed through indicator light D5 displays and known
Other result.
Further, amplifying circuit includes pre-amplification circuit and rear class amplifying circuit, and filter circuit includes bandpass filtering
Device and high-pass filter, bandpass filter are electrically connected with current transformer and pre-amplification circuit, pre-amplification circuit also with band
Bandpass filter is electrically connected, and bandpass filter connection rear class amplifying circuit, decoder is connect with rear class amplifying circuit.Current signal is first
First through band-pass filter, most of power frequency and the frequency isolation of instrument signal, then the is carried out through pre-amplification circuit
Level-one amplifier is amplified, and defeated signal is carried out to high-pass filtering and second level amplification again, so that decoder carries out frequency identification.
Further, second source module includes accumulator, switch and regulator circuit, and accumulator is through switch and regulator circuit
Electrical connection, the regulator circuit are electrically connected with the signal gathering unit, signal processing unit and signal identification unit.
Compared with prior art, advantageous effect is：Signal transmitter and signal receiver are provided with, in distribution low-voltage outlet
End input feature vector electric current, and be detected in head end, utilize the equal principle everywhere of the electric current on same circuit loop, energy
Rapidly and accurately identification connects whether distribution low-voltage outlet both ends are same conducting wire；The high-frequency current signal of signal transmitter transmitting
It can be modified by SCM program, can guarantee the high-frequency current signal of input lead will not be affected, can be another in conducting wire
Side is accurately detected；The present invention provides a kind of special detection tools of distribution low-voltage outlet, can be that accurately and quickly to matching
Become low-pressure line-outgoing to be identified, low-pressure line-outgoing identification mistake is avoided to lead to the operation loophole in Operation of Electric Systems maintenance.
Description of the drawings
Fig. 1 is the structure diagram of the present invention in one embodiment.
Specific embodiment
The present invention is further illustrated below in conjunction with the accompanying drawings, it should be noted that being given for example only property of attached drawing is said
It is bright, it is impossible to be interpreted as the limitation to this patent.
As shown in Figure 1, a kind of distribution low-voltage outlet electrification identifier, including signal transmitter and signal receiver, detection
Shi Erzhe is connected to the both ends of distribution low-voltage outlet；
Signal transmitter includes the first power module and the load being sequentially connected electrically, load switch control unit, switch drive list
Member, signal generating unit and signal display unit, load connects with tested distribution low-voltage outlet, the first power module be load,
Load switch control unit, switch drive unit, signal generating unit and signal display unit power supply.
Wherein, resistance is selected in load；Load switch control unit is selects field-effect tube；Switch drive unit includes being electrically connected
The triode and photoelectrical coupler connect；Signal generating unit is microcontroller；Signal display unit includes frequency counter, indicator light
D1, indicator light D2, indicator light D3 and indicator light D4.
Microcontroller exports high-frequency pulse signal from pin at work, generates 3 kinds of continuous alternate cycles by inside programming
High-frequency pulse signal；Microcontroller is electrically connected with triode, and photoelectrical coupler is electrically connected with field-effect tube；Triode sends out signal
The high-frequency pulse signal of raw device generation is amplified, photoelectrical coupler switch tube to be driven to be controlled；Make load switch control
Unit processed carries out Push And Release according to the frequency of high-frequency signal, makes to produce the electric current for taking the high-frequency characteristic on circuit.
Microcontroller is also electrically connected with frequency counter and indicator light D2, indicator light D3, indicator light D4, and indicator light D1 is with dividing
Frequency counter is electrically connected.Frequency counter is shone after original frequency is divided with lower frequency driving indicator light D1, convenient for observation
The frequency of the high-frequency current exported in real time, and indicator light D2, indicator light D3 and indicator light D4 are respectively with the height of this 3 kinds of different frequencies
Frequency pulse signal is shown.
In the present embodiment, to prevent apparatus overheat, signal transmitter is additionally provided with radiator fan.
Further, the first power module includes sequentially connected transformer, rectification module, filtering voltage regulation module, transformation
Device is connect with tested distribution low-voltage outlet, and power supply is provided by tested distribution low-voltage outlet.Distribution low-voltage outlet is in electriferous state,
By distribution low-voltage power supply through transformer pressure-reducing, rectification module is converted to after direct current after filtering voltage regulation module filtered voltage stabilizing, letter
Other power units of number transmitter provide power supply.
Signal receiver includes second source module and the signal gathering unit, signal processing unit and the letter that are sequentially connected electrically
Number recognition unit, signal gathering unit are connect with tested distribution low-voltage outlet, and second source module is signal gathering unit, signal
Processing unit and the power supply of signal identification unit.
Wherein, signal gathering unit is current transformer；Signal processing unit include be sequentially connected electrically bandpass filter,
Pre-amplification circuit, high-pass filter and rear class amplifying circuit；Signal identification unit include the decoder that is electrically connected mutually and
Indicator light D5；Wherein current transformer is electrically connected with bandpass filter, and decoder is electrically connected with rear class amplifying circuit.Current signal
First through band-pass filter, most of power frequency and the frequency isolation of instrument signal, then carried out through pre-amplification circuit
First order amplifier is amplified, and defeated signal is carried out to high-pass filtering and second level amplification again, and frequency identification is carried out for decoder,
Decoder shows the result of frequency identification by indicator light D5.The decoder that frequency identification is selected is LM567CN models,
LM567CN is configured by external resistor and capacitor component, can set centre frequency and the range of frequency input signal tolerance.
Further, second source module includes accumulator, switch and regulator circuit, and accumulator is through switch and regulator circuit
Electrical connection, the regulator circuit are electrically connected with the signal gathering unit, signal processing unit and signal identification unit.
In the present invention, signal transmitter is connected to the end of distribution low-voltage outlet, to distribution low-voltage outlet input feature vector electricity
Stream, signal generating unit generates high-frequency signal, and high-frequency signal is sent to switch drive unit, and switch drive unit is according to height
Frequency signal controls the switch of load switch control unit.And signal receiver is connected to the head end of distribution low-voltage outlet, passes through letter
Current signal on number collecting unit acquisition conducting wire, is amplified and filtered to current signal by signal processing unit, will be only
There is the signal identical with signal transmitter tranmitting frequency to send to signal identification unit to be identified, signal identification unit believes electric current
It number is identified, if can recognize that corresponding high-frequency signal, illustrates the signal that the circuit presence signal transmitter emits,
It is same for then can determine whether that distribution low-voltage leading-out terminal that signal transmitter accessed accesses distribution low-voltage leading-out terminal with signal receiver
One conducting wire.
For the accuracy rate for ensureing to identify, need that the signal of transmitting is prevented to be disturbed, and the harmonic wave in power circuit is to transmitting
The interference of signal is maximum, and electric harmonic is concentrated mainly on fundamental frequency between 50 times, and a few harmonics are also within 100 times, i.e. harmonic wave
Frequency is between 50Hz-5kHz.It is the same frequency of the harmonic wave that the signal of transmitting and power circuit is avoided to be likely to occur, therefore signal is sent out
High-frequency pulse signal of the machine there is provided alternate cycles continuous in 3 is penetrated, there is mcu programming realization.Even if one of which or two kinds of height
Frequency pulse signal is affected, and also the third high-frequency pulse signal can be normally detected, and three kinds of high-frequency signals are by harmonic wave
The probability of influence is only hundred a ten thousandths, in order to avoid this millionth probability, will emit the frequency of high-frequency pulse signal
100 subharmonic are set above, i.e. signal tranmitting frequency is set greater than 5kHz, you can substantially reduces by the general of harmonic effects
Rate ensure that the accuracy that the present invention detects.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention.For those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.It is all this
All any modification, equivalent and improvement made within the spirit and principle of invention etc., should be included in the claims in the present invention
Protection domain within.
Claims (9)
1. identifier is charged in a kind of distribution low-voltage outlet, which is characterized in that including signal transmitter and signal receiver, during detection
The two is connected to the both ends of distribution low-voltage outlet；
The signal transmitter includes the first power module and the load being sequentially connected electrically, load switch control unit, switch drive
Moving cell and signal generating unit, the load are connect with tested distribution low-voltage outlet, and first power module is described negative
Load switch control unit, switch drive unit and signal generating unit power supply；
The signal receiver includes second source module and the signal gathering unit, signal processing unit and the letter that are sequentially connected electrically
Number recognition unit, the signal gathering unit are connect with tested distribution low-voltage outlet, and the second source module is the signal
Collecting unit, signal processing unit and the power supply of signal identification unit.
2. a kind of distribution low-voltage outlet electrification identifier according to claim 1, which is characterized in that
The load switch control unit is switching tube；
The switch drive unit includes the triode and photoelectrical coupler of electrical connection, the photoelectrical coupler and the switching tube
Electrical connection；
The signal generating unit is microcontroller, and the microcontroller is electrically connected with the triode.
A kind of 3. distribution low-voltage outlet electrification identifier according to claim 2, which is characterized in that the signal transmitter
Signal display unit is further included, including frequency counter and indicator light D1, the frequency counter and the monolithic mechatronics,
The indicator light D1 is electrically connected with the frequency counter.
4. a kind of distribution low-voltage outlet electrification identifier according to claim 3, which is characterized in that the signal display is single
Member further includes indicator light D2, indicator light D3, indicator light D4, three with monolithic mechatronics.
A kind of 5. distribution low-voltage outlet electrification identifier according to claim 1, which is characterized in that the signal transmitter
Radiator fan is further included, the radiator fan is powered by tested distribution low-voltage outlet.
6. identifier is charged according to a kind of distribution low-voltage outlet of claim 1-5 any one of them, which is characterized in that described the
One power module includes sequentially connected transformer, rectification module, filtering voltage regulation module, the transformer and tested distribution low-voltage
Outlet connects, and power supply is provided by the tested distribution low-voltage outlet.
7. a kind of distribution low-voltage outlet electrification identifier according to claim 1, which is characterized in that
The signal gathering unit is current transformer；
The signal processing unit includes the amplifying circuit and filter circuit of electrical connection, the filter circuit and the Current Mutual Inductance
Device is electrically connected；
The signal identification unit includes the decoder being electrically connected mutually and indicator light D5, the decoder and the amplification electricity
Road is electrically connected.
A kind of 8. distribution low-voltage outlet electrification identifier according to claim 7, which is characterized in that the amplifying circuit packet
Pre-amplification circuit and rear class amplifying circuit are included, the filter circuit includes bandpass filter and high-pass filter, the band logical
Wave filter is electrically connected with the current transformer and the pre-amplification circuit, and the pre-amplification circuit is also filtered with the band logical
Wave device is electrically connected, and the bandpass filter connects rear class amplifying circuit, and the decoder is connect with rear class amplifying circuit.
9. identifier is charged according to claim 1 or 7 or a kind of distribution low-voltage outlet of 8 any one of them, which is characterized in that institute
It states second source module and includes accumulator, switch and regulator circuit, the accumulator is through the switch and regulator circuit electricity
Connection, the regulator circuit are electrically connected with the signal gathering unit, signal processing unit and signal identification unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711289957.2A CN108132405A (en) | 2017-12-08 | 2017-12-08 | Identifier is charged in a kind of distribution low-voltage outlet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711289957.2A CN108132405A (en) | 2017-12-08 | 2017-12-08 | Identifier is charged in a kind of distribution low-voltage outlet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108132405A true CN108132405A (en) | 2018-06-08 |
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ID=62389270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711289957.2A Pending CN108132405A (en) | 2017-12-08 | 2017-12-08 | Identifier is charged in a kind of distribution low-voltage outlet |
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| Country | Link |
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| CN (1) | CN108132405A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111551802A (en) * | 2020-05-06 | 2020-08-18 | 国网天津市电力公司 | Non-invasive low-voltage line switch identifier |
| CN114113818A (en) * | 2021-08-17 | 2022-03-01 | 北京中睿昊天信息科技有限公司 | HPLC low current branch recognition device system |
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| CA1219911A (en) * | 1984-03-16 | 1987-03-31 | Joseph P. Pecukonis | Tracing electrical conductors by high-frequency loading and improved signal detection |
| CN2049776U (en) * | 1989-05-24 | 1989-12-20 | 何晓东 | Digital display type apparatus for cable wires identifying |
| CN2069569U (en) * | 1990-05-25 | 1991-01-16 | 刘正兴 | Numeral speedy wire checking instrumest |
| JP2000041316A (en) * | 1997-09-24 | 2000-02-08 | Furukawa Electric Co Ltd:The | Method and device for wire identification |
| JP2003185693A (en) * | 2001-12-17 | 2003-07-03 | Toko Electric Corp | Phase discrimination apparatus for distribution line |
| CN2898844Y (en) * | 2006-04-29 | 2007-05-09 | 比亚迪股份有限公司 | Electric cable signal identifier |
| CN101603995A (en) * | 2008-06-13 | 2009-12-16 | 北京诺斯卡科技有限公司 | Method and station user identification apparatus that cable detecting device and realization thereof detect |
| CN102955096A (en) * | 2012-10-25 | 2013-03-06 | 西安开容电子技术有限责任公司 | Cable testing mechanism |
| CN207457406U (en) * | 2017-12-08 | 2018-06-05 | 广东电网有限责任公司江门供电局 | A kind of charged identifier of distribution low-voltage outlet |
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2017
- 2017-12-08 CN CN201711289957.2A patent/CN108132405A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1219911A (en) * | 1984-03-16 | 1987-03-31 | Joseph P. Pecukonis | Tracing electrical conductors by high-frequency loading and improved signal detection |
| CN2049776U (en) * | 1989-05-24 | 1989-12-20 | 何晓东 | Digital display type apparatus for cable wires identifying |
| CN2069569U (en) * | 1990-05-25 | 1991-01-16 | 刘正兴 | Numeral speedy wire checking instrumest |
| JP2000041316A (en) * | 1997-09-24 | 2000-02-08 | Furukawa Electric Co Ltd:The | Method and device for wire identification |
| JP2003185693A (en) * | 2001-12-17 | 2003-07-03 | Toko Electric Corp | Phase discrimination apparatus for distribution line |
| CN2898844Y (en) * | 2006-04-29 | 2007-05-09 | 比亚迪股份有限公司 | Electric cable signal identifier |
| CN101603995A (en) * | 2008-06-13 | 2009-12-16 | 北京诺斯卡科技有限公司 | Method and station user identification apparatus that cable detecting device and realization thereof detect |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111551802A (en) * | 2020-05-06 | 2020-08-18 | 国网天津市电力公司 | Non-invasive low-voltage line switch identifier |
| CN114113818A (en) * | 2021-08-17 | 2022-03-01 | 北京中睿昊天信息科技有限公司 | HPLC low current branch recognition device system |
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