CN107037263A - Phase angle cable identifier - Google Patents
Phase angle cable identifier Download PDFInfo
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- CN107037263A CN107037263A CN201710259116.0A CN201710259116A CN107037263A CN 107037263 A CN107037263 A CN 107037263A CN 201710259116 A CN201710259116 A CN 201710259116A CN 107037263 A CN107037263 A CN 107037263A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R25/00—Arrangements for measuring phase angle between a voltage and a current or between voltages or currents
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
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Abstract
The present invention relates to a kind of phase angle cable identifier, including power supply, power signal generator, phase detectors and multiple hook type current transformers, power supply is power signal generator, phase detectors summation current transformer provides power supply；Hook type current transformer A1 and hook type current transformer A2 are sleeved on target identification cable, hook type current transformer B is sleeved on other cables, power signal generator is connected with hook type current transformer A1, and phase detectors are connected with hook type current transformer A2 and hook type current transformer B respectively.The powered identification of the present apparatus, applies signal using coupled modes, the normal operation of cable is not influenceed, it is ensured that personal safety；It is easy to use, it is safe, solve user and power supply enterprise runs the problem of cable is recognized.
Description
Technical field
The present invention relates to a kind of live electric cable identifying device, belong to electric power application field.
Background technology
Existing common cable recognition methods mainly has pulse polarity method, audio signal method, electric-resistivity method and GPS Synchronos methods
Deng.
Pulsed magnetic field method is also referred to as pulse polarity method, and impacting with high pressure arteries and veins is applied to cable grounding loop using high-tension testing apparatus
Punching is directly injected into signal, and pulsed magnetic field is produced around cable, recycles receiving coil to be measured respectively on cable trace both sides and becomes
The magnetic field of change, found cable is recognized finally according to the opposite initial polarity of pulsed magnetic field.The method advantage is that electromagnetic field becomes
Change feature substantially, identification is accurate；Have the disadvantage in operation must manipulated untwisted cable termination ground wire, by pulse signal source to connect
Mode accesses earthed system, but in the safety standard that cable is run and is overhauled, forbids releasing ground connection in operating conditions.So
Stoppage in transit cable can only be identified for pulsed magnetic field method, it is impossible to implement the recognition detection to running cable.The electricity of domestic and international early stage
Cable recognition detection technology uses this method mostly, less at present to use.
Frequency induction method is commonly called as the maximum method of signal, and the emission current of audio signal is produced with signal generator, and by non-
The method of contact coupling is injected into cable metal sheath armor, and audio signal flows to cable end piece and produced around cable
The alternating magnetic field of raw frequency identical with source signal, due to the spiral-shaped structure of cable metal sheath armor, the alternating magnetic field is again
To produce the induced current of identical frequency in adjacent cable sheath, but its numerical value compared with emission current the phase in target cable
Than much smaller, by the signal inductive coupling of fixed frequency, detect the signal code value of different cables and carry out strong and weak comparison,
Target cable can be made a distinction with non-targeted cable according to the intensity of the electric current.The method is solved to power cable in operation
Identification problem, make progress meaning for pulse polarity method, but the method needs to find and system earth is mutually independent
Earthing mode when it is more accurate, if the ground connection of many telegram in reply cables is common ground（The construction mode generally used at present）, then
Because the difference or missing of distal end grounding resistance, cause the signal stream of each telegram in reply cable to change even no signal stream, produce erroneous judgement
Or be difficult to distinguish.To a plurality of cable arranged side by side, intersection, if an identification cable therein, current method is to target electricity
Cable apply alternating signal, need recognize cable position receive signal, by signal amplitude size is determined target cable this
The drawbacks of method of kind is that two or more adjacent cable has close range value, it is difficult to disposably complete to electricity
The identification work of cable.Most of cable identification instrument uses above-mentioned principle substantially in the market, and difference is source signal
Frequency, power and processing interface it is otherwise varied.
The basic skills of electric-resistivity method is that the ground loop resistance of each telegram in reply cable is measured with loop resistance instrument, resistance
It is equal for same cable.This method is simple and practical, but because cable running environment periphery is strong-electromagnetic field environment, in difference
There are different mushing errors in test point, the degree of accuracy is difficult to control to, it is difficult to judge target cable by equivalence.It is less at present
Using.
GPS Synchronos methods are the new methods occurred in recent years, by GPS sync identification technologies, pass through the side to detecting signal
To（Phase）Screen, it is possible to achieve the identification of online cable, discrimination is higher, but two ends are required for using GPS all the time during application
Signal receiver receives synchronizing signal, and the dependence to third party signalling is strong, receives and processing time is longer, operate not square enough
Just；Block, in swinging of signal timing, then easily judge by accident plus urban skyscraper, trees.If online cable identification
Technology can remove the dependence to GPS synchronizing signals, then larger lifting is had in terms of practicality and accuracy.
The content of the invention
The present invention, there is provided a kind of phase angle cable identifier, does not influence electricity for above-mentioned problems of the prior art
The normal operation of cable, it is ensured that personal safety；One-shot measurement extracts amplitude and phase information simultaneously, judges to provide more for recognition result
Comprehensive reference frame is so ensure that the quick purpose for searching Method of Cable Trouble Point.
Technical scheme is as follows：
Phase angle cable identifier, including power supply, power signal generator, phase detectors and multiple hook type current transformers,
Power supply is power signal generator, phase detectors summation current transformer provides power supply；Hook type current transformer A1 and jaw type electricity
Current transformer A2 is sleeved on target identification cable, and hook type current transformer B is sleeved on other cables, power signal generator
It is connected with hook type current transformer A1, phase detectors are connected with hook type current transformer A2 and hook type current transformer B respectively；
AC signal is coupled on target identification cable by power signal generator by hook type current transformer A1；Jaw type Current Mutual Inductance
Device A2 extracts the AC signal on target identification cable armor, and phase detectors can be to current test by the differentiation to signal
Cable is identified.
Advantages of the present invention effect is as follows：
1st, powered identification, applies signal using coupled modes, the normal operation of cable is not influenceed, it is ensured that personal safety.
2nd, data processing technique is advanced, and one-shot measurement extracts amplitude and phase information simultaneously, judges to provide for recognition result
More fully reference frame.
3rd, test signal has without waiting for synchronizing signal stabilization in directional information, measurement process, not by other extraneous nothings
Line signal is disturbed, plug and play.
Brief description of the drawings
Fig. 1 is structural representation of the invention.
Fig. 2 is power module circuitry figure of the present invention.
Fig. 3 is power signal generator circuit diagram of the present invention.
Fig. 4 is phase detector circuit figure of the present invention.
Fig. 5 is the amplifier circuit diagram of phase detectors of the present invention.
In Fig. 1,1, power signal generator, 2, phase detectors, 3, cable conductor, 4, cable armor, L1, target identification
Cable, L2, other cables.
Embodiment
Embodiment
As shown in figure 1, phase angle cable identifier, including power supply, power signal generator 1, phase detectors 2 and multiple
Hook type current transformer, power supply is power signal generator, phase detectors summation current transformer provides power supply；Jaw type electric current is mutual
Sensor A1 and hook type current transformer A2 are sleeved on target identification cable L1, and hook type current transformer B is sleeved on other cables
On L2, power signal generator is connected with hook type current transformer A1, phase detectors respectively with hook type current transformer A2 and
Hook type current transformer B is connected；AC signal is coupled to target by power signal generator by hook type current transformer A1 to be known
On other cable；Hook type current transformer A2 extracts the AC signal on target identification cable armor, and phase detectors pass through to letter
Number differentiation current test cable can be identified.
Power module is as shown in Fig. 2 the positive pole of the large-capacity battery P and the resistance R one end, electrolysis electricity
Hold C48 positive pole, one end of the electric capacity C49, the input of the 7805 voltage-stabiliser tube N20, the electrochemical capacitor C52 just
Pole, one end of the electric capacity C53, the input of the 7812 voltage-stabiliser tube N21 are connected, the other end of the resistance R and described two
Pole pipe D positive pole is connected, the negative pole of the large-capacity battery P and the negative pole of the diode D, electrochemical capacitor C48 negative pole,
The other end of the electric capacity C49, the earth terminal of the 7805 voltage-stabiliser tube N20, the negative pole of the electrochemical capacitor C52, the electric capacity
The C53 other end, the earth terminal of the 7812 voltage-stabiliser tube N21, systematically GND be connected, the output end of the 7805 voltage-stabiliser tube N20
Positive pole, one end of the electric capacity C51, system power supply VCC with the electrochemical capacitor C50 are connected, and the electrochemical capacitor C50's is negative
Pole is with the other end of the electric capacity C51, systematically GND is connected, the output end of the 7812 voltage-stabiliser tube N21 and the electrolysis electricity
Positive pole, one end of the electric capacity C55, the system power supply 12VCC for holding C54 are connected, negative pole and the electricity of the electrochemical capacitor C54
The appearance C55 other end, systematically GND are connected.
The main function of power module has at following 2 points：By the diode D and resistance R come indicating battery electric quantity；It is logical
Cross capacitor filtering and voltage-stabiliser tube and provide DC5V and DC12V power supplys to control panel.
Power signal generator is described to connect as shown in figure 3, the 1st pin of the plug receptacle P1 is connected with systematically GND
Socket P1 the 2nd pin, 10th pin, 11st pin of the 3rd pin respectively with the single-chip microcomputer U1 is connected；Main function be to
The single-chip microcomputer U1 downloads, to control emitter to complete specific function.
The 1st pin of the chip U3 is connected with its 8th pin, the 2nd pin and the system power supply VCC phases of the chip U3
Even, the 3rd pin of the chip U3 is connected with systematically GND, the 6th pin of the chip U3 and the 13rd of the single-chip microcomputer U1 the
Pin is connected, and the 7th pin of the chip U3 is connected with the 9th pin of the single-chip microcomputer U1；The main work of the partial circuit diagram
With being that when opening emitter every time the single-chip microcomputer U1 can be made to automatically reset, initial default state is returned to, and can
Ensure that the single-chip microcomputer U1 will not run winged deadlock in configuration processor.
The 18th pin of the single-chip microcomputer U1 is connected with one end of the crystal oscillator D2, the electric capacity C5 one end, the list
Piece machine U1 the 19th pin is connected with the other end of the crystal oscillator D2, the electric capacity C4 one end, the other end of the electric capacity C4
The other end with the electric capacity C5, systematically GND are connected；The part is the crystal oscillating circuit of the single-chip microcomputer U1, is mainly finger
The control of order and the clock cycle that offer stabilization is provided, to ensure that it is reliable with the control of flow that data are calculated.
The 39th pin of the single-chip microcomputer U1 connects with one end of the electric capacity C2, the other end of the electric capacity C2 with it is described
Resistance R1 one end, the base stage of the triode Q1 are connected, the other end of the resistance R1 and the triode Q1 colelctor electrode,
System power supply VCC, one end of the electric capacity C1 are connected, and the other end of the electric capacity C1 is connected with current clamp one end, three pole
Pipe Q1 emitter stage is connected with one end of the resistance R3, one end of the electric capacity C3, the other end of the resistance R3 with it is described
The electric capacity C3 other end, systematically GND, the current clamp other end are connected.The main function of the circuit is that the single-chip microcomputer U1 passes through
Internal processes produce specific frequency sine wave signal S1, by its 39th pin export, via electric capacity C2, resistance R1, triode Q1,
Electric capacity C1, resistance R3, the signal amplification circuit of electric capacity C3 compositions, after signal is amplified, then will by hook type current transformer
AC signal is coupled on target identification cable.
The 2nd pin of the single-chip microcomputer U1 is connected with one end of the resistance R2, the other end of the resistance R2 with it is described
Diode D1 negative pole is connected, and the positive pole of the diode D1 is connected with system power supply VCC, and the 12nd of the single-chip microcomputer U1 draws
Pin is connected with one end of the resistance R4, and the other end of the resistance R4 is connected with the base stage of the triode V1, three pole
Pipe V1 emitter stage is connected with systematically GND, and the colelctor electrode of the triode V1 is connected with one end of the buzzer SPK1,
The other end of the buzzer SPK1 is connected with system power supply VCC.The main function of the part is to work as emitter by certain frequency
AC signal when being coupled to by hook type current transformer on target identification cable, single-chip microcomputer U1 drives diode D1 bright simultaneously
Rise, buzzer SPK1 sounds, to point out emitter to be in normal mode of operation.
Phase detectors are as shown in figure 4, the 1st pin of the plug receptacle P2 is connected with systematically GND, the plug receptacle P2
The 2nd pin, 10th pin, 11st pin of the 3rd pin respectively with the single-chip microcomputer U2 be connected；Main function is to the list
Piece machine U2 downloads, to control receiver to complete specific function.
The 1st pin of the chip U4 is connected with its 8th pin, the 2nd pin and the system power supply VCC phases of the chip U4
Even, the 3rd pin of the chip U4 is connected with systematically GND, the 6th pin of the chip U4 and the 17th of the single-chip microcomputer U2 the
Pin is connected, and the 7th pin of the chip U4 is connected with the 9th pin of the single-chip microcomputer U2；The main work of the partial circuit diagram
With being that when opening receiver every time the single-chip microcomputer U2 can be made to automatically reset, initial default state is returned to, and can
Ensure that the single-chip microcomputer U2 will not run winged deadlock in configuration processor.
The 18th pin of the single-chip microcomputer U2 is connected with one end of the crystal oscillator D3, the electric capacity C7 one end, the list
Piece machine U2 the 19th pin is connected with the other end of the crystal oscillator D3, the electric capacity C6 one end, the other end of the electric capacity C6
The other end with the electric capacity C7, systematically GND are connected；The part is the crystal oscillating circuit of the single-chip microcomputer U2, is mainly finger
The control of order and the clock cycle that offer stabilization is provided, to ensure that it is reliable with the control of flow that data are calculated.
Amplifier circuit is as shown in figure 5, the signal output part phase of the input side and current clamp of the isolating transformer T1
Even, outlet side one end of the isolating transformer T1 and the positive pole, the negative pole of the diode D1, the fortune of the diode D1
Put chip U2 the 3rd pin, the 1st pin of the potentiometer W1, the 3rd pin of the potentiometer W1, the potentiometer W2
1st pin, the 3rd pin of the potentiometer W2, one end of the electric capacity C1 are connected, and the outlet side of the isolating transformer T1 is another
One end and the negative pole of the diode D1, the positive pole of the diode D1, the 2nd pin of the amplifier chip U2, the amplifier
Chip U2 the 4th pin, one end of the electric capacity C3, systematically GND be connected, the 7th pin and system of the amplifier chip U2
Power supply VCC is connected, and the 2nd pin of the potentiometer W1 is connected with one end of the electric capacity C2, the 2nd pin of the potentiometer W2
Be connected with one end of the resistance R1, the 6th pin of the amplifier chip U2 with, the other end of the electric capacity C1, the electric capacity
The C2 other end, the other end of the resistance R1, the other end of the electric capacity C3 are connected.The main function of the part is to use jaw type
Current transformer is added on cable, extracts the AC signal on armor, is eliminated and is disturbed via isolating transformer T1, then by amplifier
Chip U2 and peripheral circuit carry out the enhanced processing of signal, enable signal to allow single-chip microcomputer U2 to recognize, signal by P20, P21,
P22, P23 port are input to inside single-chip microcomputer, are compared by the calculating of internal processes, judge whether this signal is emitter with this
The signal of transmitting, then result of calculation is output in LED liquid-crystal display by P35, P34, P32 port, now operating personnel
Just can be by obtaining test result on LCDs.
The operation principle of the present invention is as follows：When signal is added on target identification cable by power signal generator, target is known
Induced-current I1 will be produced on other cable L1 metal armor, rated current direction is to the right（Flowed to test side）For just.
Because armor is ground connection at two ends, so just a current loop is constituted with the earth.Normally electric current flowing route is：From hair
End is penetrated through armor to receiving terminal, the earth is flowed to by ground wire, transmitting terminal is returned to through the earth, loop is constituted.
According to above-mentioned principle, as long as whether have on test side measurement cable can sentence with transmitting terminal identical AC signal
Whether disconnected is target cable.But in fact, due to and the armors of other cables that are in juxtaposition of target identification cable L1 all and
The earth is connected, originally from the electric current of line residual current will some from other cables（Such as L2）Metal armor flow back to.This
Sample is when detecting other cable armors, it is also possible to detect alternating-current detection signal.In order to ensure the standard of identifier testing result
True property, test side must add phase-detection function.Because flowing through other cables L2 sense of current all the time and flowing through target knowledge
The other cable L1 sense of current is on the contrary, such test side phase and transmitting terminal opposite in phase.But due to launching and receiving letter
Number it is the sine wave of identical frequency, is that can not judge whether electricity if the ununified time reference of transmitting terminal and receiving terminal
Stream is reverse.The problem of in order to solve time reference, launch the sine wave of two frequencies, and the electricity that is added to simultaneously in transmitting terminal
On the armor of cable, test side carries out relative phase detection may identify whether it is target cable by the signal to two frequencies.
The signal phase measured on identification cable is 0 °, because electric current is sent from power signal generator and is injected into identification cable
On, it is necessary to power signal generator is returned to by ground wire, then the phase angle measured on other cables must be at 180 °（That is,
The cable for wanting identification must be opposite with the electric current of other cables）, by the amplitude and phase angle information of offer, can be derived that just
True result.
Claims (4)
1. phase angle cable identifier, it is characterised in that including power supply, power signal generator, phase detectors and multiple jaw types
Current transformer, power supply is power signal generator, phase detectors summation current transformer provides power supply；Hook type current transformer
A1 and hook type current transformer A2 are sleeved on target identification cable, and hook type current transformer B is sleeved on other cables, power
Signal generator is connected with hook type current transformer A1, and phase detectors are mutual with hook type current transformer A2 and jaw type electric current respectively
Sensor B is connected；AC signal is coupled on target identification cable by power signal generator by hook type current transformer A1；Pincers
Formula current transformer A2 extracts the AC signal on target identification cable armor, and phase detectors pass through the differentiation to signal
Current test cable is identified.
2. cable identifier in phase angle according to claim 1, it is characterised in that described power signal generator structure
For plug receptacle（P1）The 1st pin be connected with systematically (GND), the plug receptacle（P1）The 2nd pin, the 3rd pin difference
With single-chip microcomputer（U1）The 10th pin, the 11st pin be connected；
Chip（U3）The 1st pin be connected with its 8th pin, the chip（U3）The 2nd pin be connected with system power supply VCC,
The chip（U3）The 3rd pin be connected with systematically (GND), the chip（U3）The 6th pin and the single-chip microcomputer（U1）
The 13rd pin be connected, the chip（U3）The 7th pin and the single-chip microcomputer（U1）The 9th pin be connected；
The single-chip microcomputer（U1）The 18th pin and crystal oscillator（D2）One end, electric capacity（C5）One end be connected, the single-chip microcomputer
（U1）The 19th pin and the crystal oscillator（D2）The other end, electric capacity（C4）One end be connected, the electric capacity（C4）The other end
With the electric capacity（C5）The other end, systematically (GND) be connected；
The single-chip microcomputer（U1）The 39th pin and electric capacity（C2）One end connect, the electric capacity（C2）The other end and resistance
（R1）One end, triode（Q1）Base stage be connected, the resistance（R1）The other end and the triode（Q1）Colelctor electrode,
System power supply VCC, electric capacity（C1）One end be connected, the electric capacity（C1）The other end be connected with current clamp one end, three pole
Pipe（Q1）Emitter stage and resistance（R3）One end, electric capacity（C3）One end be connected, the resistance（R3）The other end with it is described
Electric capacity（C3）The other end, systematically (GND), the current clamp other end be connected；
The single-chip microcomputer（U1）The 2nd pin and resistance（R2）One end be connected, the resistance（R2）The other end and diode
（D1）Negative pole be connected, the diode（D1）Positive pole be connected with system power supply VCC, the single-chip microcomputer（U1）The 12nd draw
Pin and resistance（R4）One end be connected, the resistance（R4）The other end and triode（V1）Base stage be connected, the triode
（V1）Emitter stage be connected with systematically (GND), the triode（V1）Colelctor electrode and buzzer (SPK1) one end phase
Even, the other end of the buzzer (SPK1) is connected with system power supply VCC.
3. cable identifier in phase angle according to claim 1, it is characterised in that described phase detectors structure is to connect
Socket（P2）The 1st pin be connected with systematically (GND), the plug receptacle（P2）The 2nd pin, the 3rd pin respectively with monolithic
Machine（U2）The 10th pin, the 11st pin be connected；
Chip（U4）The 1st pin be connected with its 8th pin, the chip（U4）The 2nd pin be connected with system power supply VCC,
The chip（U4）The 3rd pin be connected with systematically (GND), the chip（U4）The 6th pin and the single-chip microcomputer（U2）
The 17th pin be connected, the chip（U4）The 7th pin and the single-chip microcomputer（U2）The 9th pin be connected；
The single-chip microcomputer（U2）The 18th pin and crystal oscillator（D3）One end, electric capacity（C7）One end be connected, the single-chip microcomputer
（U2）The 19th pin and the crystal oscillator（D3）The other end, electric capacity（C6）One end be connected, the electric capacity（C6）The other end
With the electric capacity（C7）The other end, systematically (GND) be connected.
4. cable identifier in phase angle according to claim 3, it is characterised in that described amplifier circuit is to isolate
Transformer（T1）Input side be connected with the signal output part of current clamp, the isolating transformer（T1）Outlet side one end and two
Pole pipe（D1）Positive pole, diode（D1）Negative pole, amplifier chip（U2）The 3rd pin, potentiometer（W1）The 1st pin, electricity
Position device（W1）The 3rd pin, potentiometer（W2）The 1st pin, potentiometer（W2）The 3rd pin, electric capacity（C1）One end be connected,
The isolating transformer（T1）The outlet side other end and the diode（D1）Negative pole, the diode（D1）Positive pole,
The amplifier chip（U2）The 2nd pin, the amplifier chip（U2）The 4th pin, the electric capacity（C3）One end, systematically
(GND) it is connected, the amplifier chip（U2）The 7th pin be connected with system power supply VCC, the potentiometer（W1）The 2nd pin
With the electric capacity（C2）One end be connected, the potentiometer（W2）The 2nd pin and the resistance（R1）One end be connected, it is described
Amplifier chip（U2）The 6th pin and, the electric capacity（C1）The other end, the electric capacity（C2）The other end, the resistance
（R1）The other end, the electric capacity（C3）The other end be connected.
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|---|---|---|---|
| CN201710259116.0A CN107037263A (en) | 2017-04-20 | 2017-04-20 | Phase angle cable identifier |
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| CN201710259116.0A CN107037263A (en) | 2017-04-20 | 2017-04-20 | Phase angle cable identifier |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108957110A (en) * | 2018-05-21 | 2018-12-07 | 安徽国电京润电力科技有限公司 | A kind of instantaneous value measurement method of substation bus bar voltage phase angle dynamic |
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