CN102498407A - Electromagnetic field sensor, and receiver - Google Patents
Electromagnetic field sensor, and receiver Download PDFInfo
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- CN102498407A CN102498407A CN2010800407323A CN201080040732A CN102498407A CN 102498407 A CN102498407 A CN 102498407A CN 2010800407323 A CN2010800407323 A CN 2010800407323A CN 201080040732 A CN201080040732 A CN 201080040732A CN 102498407 A CN102498407 A CN 102498407A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/142—Arrangements for simultaneous measurements of several parameters employing techniques covered by groups G01R15/14 - G01R15/26
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/16—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using capacitive devices
- G01R15/165—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using capacitive devices measuring electrostatic potential, e.g. with electrostatic voltmeters or electrometers, when the design of the sensor is essential
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
- G01R15/186—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers using current transformers with a core consisting of two or more parts, e.g. clamp-on type
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/0864—Measuring electromagnetic field characteristics characterised by constructional or functional features
- G01R29/0878—Sensors; antennas; probes; detectors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/20—Modifications of basic electric elements for use in electric measuring instruments; Structural combinations of such elements with such instruments
- G01R1/22—Tong testers acting as secondary windings of current transformers
Abstract
Disclosed is an electromagnetic field sensor, by which discriminating operation can be simplified, and a cable can be discriminated rapidly and correctly. The clamp-type sensor (30) is provided with: a substantially annular electrode (31), which is composed of a nonmagnetic material having conductivity, and which surrounds a part of a cable in the circumferential direction in a state where the cable is clamped; a magnetic core (33), which is composed of a magnetic material, and is disposed on the outer side of a ring (31a) of the electrode (31) with an insulator (32) therebetween; a winding wire (34), which is wound around the magnetic core (33); and an output section (35), which is led out by means of a lead wire (35a) from the electrode (31), and led out from both the ends of the winding wire (34) by means of a lead wire (35b). An inductive current generated in the winding wire (34) due to electromagnetic induction is outputted from the output section (35), and a voltage generated in the electrode (31) due to electrostatic induction is outputted from the output section (35).
Description
Technical field
The present invention relates to from a plurality of cables, to discern the emf sensor and the receiver that use in the cable indexing unit of cable of hoping or the laying path of confirming cable.
Background technology
In the binding method in the stringing engineering of the fiber optic network of custom system, in a spiral messenger wire (spiral hanger), lay many fiber optic cables.Therefore, in embedding operation that connector box (closure) newly is set etc., in the interval with many changes of fiber optic cables, need the time as the differentiation of the fiber optic cables of operand, the differentiation operating efficiency of fiber optic cables is not high.In addition, the installation errors of connector box or the mistake of fiber optic cables might take place cut off the communication failure that causes, therefore, the differentiation of carrying out fiber optic cables rapidly and exactly becomes important.
Corresponding therewith, the pick-up unit of existing cable at the transmitter that is used for the cable that confirm is sent current signal or voltage signal, is provided with the both sides' of these current signals of free oscillation and voltage signal a oscillatory circuit of signal.Accompany therewith, through signal processing circuit constitute receive and processing list be shown in the above-mentioned cable that should confirm around the receiver (for example, with reference to patent documentation 1) of signal of the magnetic field that produces or electric field.
The prior art document
Patent documentation
Patent documentation 1: TOHKEMY 2005-114561 communique
Summary of the invention
But; The pick-up unit of existing cable; The detecting device of induction detecting device and electrostatic induction formula is independently; When the operator according to transmitter report the cable detection that the result knows which kind of mode that carry out induction and electrostatic induction formula after, need some detecting devices of detecting device that will induction detecting device and electrostatic induction formula to be connected on the receiver, exist differentiation to operate miscellaneous problem.
Propose this invention in order to solve above-mentioned problem, it provides can simplify emf sensor and the receiver of differentiating operation.
Be used to solve the means of problem
In the emf sensor of this invention, be characterised in that to possess: the nonmagnetic material by having electric conductivity constitutes, and under the state that cable is axially passed through, surrounds the electrode of approximate ring-type of the part of this cable in a circumferential direction; Magnetic by having electric conductivity constitutes, and is configured in the magnetic core in the outside of the ring of said electrode via insulator; The coil that on said magnetic core, twines; And draw from said electrode; Double-end efferent from said coil; From the induction current that said efferent output produces through electromagnetic induction according to the electric current that cable, flows, export the voltage that produces said electrode through electrostatic induction according at the voltage that cable applies from said efferent in said coil.
The effect of invention
In disclosed emf sensor, can simplify and differentiate operation, can be rapidly and carry out the differentiation of cable exactly.
Description of drawings
Fig. 1 (a) is the block diagram of summary structure of the transmitter side of expression cable indexing unit, and Fig. 1 (b) is the block diagram of summary structure of the receiver side of expression cable indexing unit.
Fig. 2 (a) is the outside drawing of the summary structure of expression jaw type emf sensor shown in Figure 1, and Fig. 2 (b) is the partial section in the inner cross section of the magnetic core sheath of the jaw type emf sensor shown in the presentation graphs 2 (a).
Fig. 3 (a) is the partial section of the open mode of the jaw type emf sensor shown in the presentation graphs 2 (b), and Fig. 3 (b) is the partial section of another embodiment of the jaw type emf sensor shown in Fig. 2 (b).
Fig. 4 (a) is the partial section of another embodiment of the jaw type emf sensor shown in the presentation graphs 2 (b), and Fig. 4 (b) is the partial section of the another embodiment of the jaw type emf sensor shown in the presentation graphs 2 (b).
Fig. 5 (a) is the circuit diagram that is used for the evaluation test of jaw type emf sensor, and Fig. 5 (b) is result's the table of the evaluating characteristics of expression jaw type emf sensor.
Fig. 6 is the arrangement plan that is used for the simulation yard test of cable indexing unit.
Fig. 7 is checking result's the table of differentiation performance of the jaw type emf sensor of expression electrode width 16mm.
Fig. 8 is checking result's the table of differentiation performance of the jaw type emf sensor of expression electrode width 32mm.
Fig. 9 is checking result's the table of differentiation performance of the jaw type emf sensor of expression electrode width 35mm.
Figure 10 is checking result's the table of differentiation performance of the jaw type emf sensor of expression electrode width 40mm.
Figure 11 is checking result's the table of differentiation performance of the jaw type emf sensor of expression electrode width 50mm.
Embodiment
(the 1st embodiment of the present invention)
The discriminant approach of fiber optic cables does; On the Support Level of fiber optic cables or the steel wire that uses as tension member (tension member); Apply electric signal via sending with current transformer (CT:current transformer) 20 from transmitter 10; Detect this signal via jaw type emf sensor 30 of the present invention (receive and use sensor) with receiver 40, discern fiber optic cables thus.In addition, transmitter 10 and receiver 40 are for example enumerated the ProductName " PTR600 power tracking device " that TASCO company produces.
In Fig. 1 (a), transmitter 10 possesses: as baseband signal, transmission will be the on/off in cycle (frequency 1kHz) with 1msec and be the signaler 11 of the signal that gets of the on/off combination in cycle (frequency 2.5Hz) with 400msec with frequency 33.3kHz; Amplification is from the amplifier 12 of the signal of signaler 11 inputs; AC signal from the signal of amplifier 12 inputs is passed through, cut off the coupling condenser 13 of direct current signal.
In addition, the signal that sends from signaler 11, the signal of frequency 33.3kHz and 1kHz is as judgment signal and acting signal, and the signal of frequency 2.5Hz is ringing and the flicker of lamp and acting signal as hummer.
In addition; As judgment signal; The signal overlap that makes frequency 1kHz is applied on the differentiation object cable from transmitter 10 on the baseband signal of frequency 33.3kHz, detects through receiver 40; Be reduced in thus differentiate the object cable around other cables of laying or be arranged on around the influence of the external noise that produces of equipment etc., realized differentiating the raising of reliability of the differentiation of object cable.
Send with CT20 at the coil that has twined 20 circles (about respectively 10 circles) on the FERRITE CORE of the divergence type of internal diameter 27mm.In addition, the number of turn of the coil that on FERRITE CORE, twines is not limited to 20 circles, but shown in following table 1, is preferably the 20 outstanding circles of two characteristics that voltage applies and electric current is switched on according to experimental result.In addition, CT20 is used in the transmission of this embodiment, owing on the FERRITE CORE of internal diameter 27mm, twined coil; Therefore serve as to differentiate object with external diameter 25mm with interior cable; But,, then be not limited to the differentiation object cable of this external diameter if increase the internal diameter of FERRITE CORE.
[table 1]
Send characteristic with CT
| The number of turn of coil | Voltage applies performance | Electric |
| 10 | * (can not) | * (can not) |
| 20 | Zero (very) | Zero (very) |
| 30 | △ (can) | △ (can) |
| 40 | △ (can) | △ (can) |
Jaw type emf sensor 30 constitutes and can carry out clamping to differentiating the object cable, is to detect the magnetic field that produces according to the electric current that in differentiating the object cable, flows through and/or according at the detecting device of differentiating the electric field that the voltage that applies on the object cable produces.
In Fig. 2 and Fig. 3 (a), jaw type emf sensor 30 possesses: differentiate the object cable in clamping and make under its state that axially passes through, surround the electrode 31 of the approximate ring-type of a part of differentiating the object cable in a circumferential direction; Be arranged on the magnetic core 33 in the outside of the ring 31a of electrode 31 via insulator 32; The coil 34 that on magnetic core 33, twines; Draw the efferent 35 of drawing through lead 35b from the two ends of coil 34 through lead 35a from electrode 31; The framework 36 that holds magnetic core 33.
Electrode 31 is made up of the nonmagnetic material with electric conductivity; In this embodiment; The crooked and left and right symmetrically formation of 1 copper coin with approximate rectangle presents the configuration relatively in couples of approximate semicircular ground, has from the outside of ring 31a outstanding; When opening and closing, be in contact with one another the butt joint end face 31b of separation, and have the opposite face 31c crooked in the opposite direction with respect to this butt joint end face 31b.In addition, electrode 31 produces voltage according to being applied to the voltage of differentiating on the object cable through electrostatic induction, via lead 35a voltage is outputed to efferent 35.
In addition, electrode 31 is made nonmagnetic material, be the magnetic field that produces according to the electric current that in differentiating the object cable, flows through through electrode 31 shieldings for not, and in magnetic core 33, induce magnetic field.
In addition, electrode 31 is through having opposite face 31c, and opposite face 31c and wall etc. are contacted, and detects the electric field that the voltage that applies on the differentiation object cable according to laying such as in wall produces, and can confirm to differentiate the laying path of object cable.
In addition; If do not have the search function in the laying path of differentiating the object cable in the jaw type emf sensor 30; Then electrode 31 need not have opposite face 31c yet, and electrode 31 for example can be shown in Fig. 4 (a), for having the shape of ring 31a and butt joint end face 31b; Or shown in Fig. 4 (b), for only having the shape of ring 31a.
Magnetic core 33 is made up of the magnetic with electric conductivity; In this embodiment, use two in the metal level 33a of film like laminated the magnetic shielding sheet (magnetic film) that constitutes as PET (polyethylene terephthalate) film of insulation course 32a, along the ring 31a of electrode 31 and each magnetic film of arranged outside of butt joint end face 31b.
In addition, magnetic core 33 is because detection sensitivity is affected according to the space in the magnetic force loop, and it is important therefore making the mated condition of magnetic core 33 remain kilter.Therefore, through arranged outside magnetic core 33 at the butt joint end face 31b of electrode 31, can guarantee among the butt joint end face 31b of electrode 31 about magnetic film area respect to one another, can seek characteristic stable of magnetic core 33.
In addition, the magnetic core 33 of this embodiment has used the magnetic film, but also can use the FERRITE CORE of divergence type.When use has the magnetic core of electric conductivity, shown in Fig. 3 (b),, need between magnetic core 33 and electrode 31, insert insulator 32 for insulation between magnetic core 33 and the electrode 31.
Efferent 35 is connected with receiver 40, and the induction current that will in coil 34, produce through electromagnetic induction outputs to receiver 40, and the voltage that will in electrode 31, produce through electrostatic induction outputs to receiver 40.
In Fig. 1 (b), receiver 40 possesses: electromagnetic field detection portion 41, totalizer 42, signal amplification/sensitivity adjustment portion 43, wave filter 44, signal level detection portion 45 and report portion 46.
Electric field (voltage) and/or magnetic field (induction current) detect according to voltage and/or induction current from 30 inputs of jaw type emf sensor in electromagnetic field detection portion 41, and detected induction current is transformed to voltage, output to totalizer 42.In the detection of magnetic field (induction current); In the situation that has constituted resonant circuit with when not constituting the evaluation test of stating after having carried out under the situation of resonant circuit; Under the situation that has constituted resonant circuit; The differentiation performance of differentiating the object cable is outstanding, so electromagnetic field detection portion 41 preferred built-in resonant circuit in the detection of magnetic field (induction current).
Signal amplification/sensitivity adjustment portion 43; For voltage from totalizer 42 inputs; Under receiving intensity strong (below's be called strong cohesiveness receive) situation, magnification is made as 50 times, under the situation of (below be called weak reception) a little less than the receiving intensity, magnification is made as 2.5 times, output to wave filter 44.In addition; Signal amplification/sensitivity adjustment the portion 43 of this embodiment, after in the research of specification of the jaw type emf sensor 30 stated, in order to make the compatible best of the jaw type emf sensor 30 that is connected with receiver 40; Be set at this magnification, but be not limited to this magnification.
Signal level detection portion 45 is according to the level of the threshold test that is predetermined from the signal of wave filter 44 inputs, and detected signal level is outputed to the portion of reporting 46.
Report portion 46 according to level,, the operator is reported through ringing of hummer and/or lighting etc. of lamp from the signal of signal level detection portion 45 inputs.
At this, the specification of research jaw type emf sensor 30.
At first; The best number of turn about the coil in the jaw type emf sensor 30 34; Use the evaluation test circuit shown in Fig. 5 (a); (more than the 10k Ω) carries out the detection of electric field under the big situation of the resistance value of closed-loop path, and (below the 10k Ω) carries out the detection in magnetic field under the little situation of the resistance value of closed-loop path, and expression comes adjusted result with receiver 40 combinations in Fig. 5 (b).At this, the width of the length direction (direction vertical with circumferencial direction) of electrode in the jaw type emf sensor 30 31 and magnetic film (metal level 33a, insulation course 32a) is made as 16mm.
Shown in Fig. 5 (b), be under the situation of 30 circles and 40 circles in the number of turn of coil 34, in order in magnetic field detection, to obtain differentiating well behaved result, in the jaw type emf sensor 30 of this embodiment, selected 40 circles as the number of turn of coil 34.In addition; The coil 34 of this embodiment; Twine with 40 circles (about each 20 circles) for the magnetic film that comprises metal level 33a (magnetic core 33), but be not limited to this number of turn, preferably adjust the number of turn according to the sensitivity of jaw type emf sensor 30 desired magnetic field detection.
Then, make up the equipment simulated field shown in Figure 6, about possessing transmitter 10, sending the differentiation performance with the cable of the cable indexing unit of CT20, jaw type emf sensor 30 and receiver 40, the result that expression is verified in Fig. 7.At this, the width of the length direction of electrode in the jaw type emf sensor 30 31 and magnetic film is made as 16mm.
In addition; Simulation yard is made as the distance between a worktable and another worktable about 20m, will be that the route that returns the approximate U font of a worktable from a worktable via another worktable is made in the combination of the fiber optic cables of 200 cores, 100 cores, 12 cores, 12 cores and 12 cores with the optical fibre core number that the height about liftoff 1.5m hangs through support.In the route of this approximate U font, demonstration test has been implemented in simulation ground in 3 these two-route of 200 cores, 100 cores and 12 cores 3 and 12 cores, 12 cores and 12 cores.
In addition, about the length of employed fiber optic cables, the fiber optic cables of 200 cores are 68m, and the fiber optic cables of 100 cores are 145m, and the fiber optic cables of 12 cores are 46m.In addition, about the residue length of fiber optic cables, terminal part tie up implement the test.
In addition, the resistance value of the Support Level in each fiber optic cables of the resistance value of earth point and 200 cores, 100 cores and 12 cores is shown in following table 2.
[table 2]
| Project | Resistance value [Ω] |
| Ground connection | 90.0 |
| Support Level (200 core) | 3.3 |
| Support Level (100 core) | 8.7 |
| Support Level (12 cores: red) | 2.9 |
| Support Level (12 cores: indigo plant) | 3.0 |
| Support Level (12 cores: white) | 3.0 |
And; In demonstration test; As the simulation electric pole Installation Modes that spreads that does not have judgment signal; Be connected with two other cables will not differentiating the object cable, will do not differentiate (simulation electric pole Installation Modes 1) under the situation of two-terminal-grounding of object cable, will not differentiate the object cable and be connected with two other cables, with (simulating electric pole Installation Modes 2) under the situation of an end ground connection of differentiation object cable with will not differentiate the object cable and be connected with two other cables; (the simulation electric pole is installed simulation 3) verified to each route under the situation with the two-terminal-grounding of differentiating the object cable.
In addition; In demonstration test,, do not constitute the simulation electric pole Installation Modes of closed-loop path as spreading of judgment signal arranged; Be connected with an end with other cable will differentiating the object cable; (simulation electric pole Installation Modes 4) under the situation with an end ground connection of differentiating the object cable, will differentiate the object cable and be connected with an end with other cable, with under the situation of the two-terminal-grounding of differentiation object cable (simulating electric pole Installation Modes 5), verify to each route.
In addition; In demonstration test; As spreading of judgment signal arranged, constituted the simulation electric pole Installation Modes of closed-loop path, be connected with two ends with other cable will differentiating the object cable; (simulation electric pole Installation Modes 6) under the situation with an end ground connection of differentiating the object cable, will differentiate the object cable and be connected with two ends with other cable; Under the situation with the two-terminal-grounding of differentiating the object cable (simulation electric pole Installation Modes 7) with will differentiate the object cable and be connected with two ends with two other cables, (installation of simulation electric pole simulates 8) verified to each route under the situation with the two-terminal-grounding of differentiating the object cable.
In this demonstration test, as shown in Figure 7, obtained detecting the result of performance (the differentiation performance of the cable when the not constituting the closed-loop path) difference of electric field.Therefore, in order to improve the performance that electric field detects, when the width of the length direction of electrode 1 is changed in 30mm～40mm scope, confirm when the action of the electric field detection of width cable indexing unit when 32mm is above of the length direction of electrode 1 good.
In addition, in Fig. 7, double circle (◎) mark is represented to light 5 as LED (light-emitting diode) lamp of the portion that reports 46 of receiver 40, is the situation of reacting very good, the evaluation result that can differentiate reliably.In addition, circle (zero) mark is represented to light 3～5 or can decision level as the LED lamp of the portion that reports 46 of receiver 40, is the good situation of reaction, the evaluation result that can differentiate.In addition, triangle (△) mark is represented to light as the LED lamp of the portion that reports 46 of receiver 40, is the low situation of reaction, according to the evaluation result that number can be differentiated of lighting of LED lamp.In addition, cross (*) mark is represented to light 0～3 as the LED lamp of the portion that reports 46 of receiver 40, the evaluation result that can't differentiate.
Fig. 8 representes according to evaluation result shown in Figure 7; Be the width of the length direction of 32mm, magnetic film differentiation performance, the result who uses simulation yard shown in Figure 6 to verify to the width of the length direction that has used electrode 1 as the cable of the cable indexing unit under the situation of the jaw type emf sensor 30 of 16mm.
In this demonstration test, as shown in Figure 8, to have confirmed under full terms, can carry out the differentiation of cable, the cable indexing unit has good performance as the arbiter of cable.
As previously mentioned; Can know that electrode 1 and magnetic film in the jaw type emf sensor 30 are made as 16mm with the width of length direction; When having realized the checking in the simulation yard, need the further raising of the performance that electric field detects, preferably the width with the length direction of electrode 1 is made as more than the 32mm.
On the other hand; Increase the width of the length direction of electrode 1; The needed power of the switching of jaw type emf sensor 30 increases, and electrode 1 is imagined the operability that the clamping of differentiating the object cable is operated and reduced with respect to the overhang increase of framework 36; Or object cable, situation about can't differentiate are differentiated in clamping fully.
Relative therewith; The reliability and the practical aspect of the differentiation of the cable that the cable indexing unit carries out considered in following table 3 expression; Use possesses the jaw type emf sensor 30 of electrode 1 of width of the length direction of the 32mm, 35mm, 40mm, 45mm and the 50mm that have in the scope of 32mm～50mm, the result of the characteristic through the evaluation test Circuit verification electromagnetic field detection shown in Fig. 5 (a).In addition, use the receiver 40 of resonant circuit that has been considered to formation that performance that magnetic field detection uses improves.
[table 3]
The characteristic of jaw type emf sensor and the relation of electrode width
As shown in table 3, the characteristic of jaw type emf sensor 30, the width of the length direction of electrode 1 (below be called electrode width) does not have very big difference in 32mm～50mm; The electric field during but strong cohesiveness is received detects performance, and with respect to electrode width 32mm, the above performance of electrode width 35mm is better; Magnetic field detection performance in weak the reception, loop resitance can be differentiated with little electric current more greatly more, therefore; With respect to electrode width 32mm and 35mm, the above performance of electrode width 40mm is better.
Therefore, consider practical aspect, think that as the electrode width of jaw type emf sensor 30 40mm is appropriate, therefore, comprise electrode width 40mm, verify through simulation yard to electrode width 35mm and 50mm interior.
Structure simulates the equipment of the field different with field shown in Figure 6; Differentiation performance about the cable of cable indexing unit; Checking result when Fig. 9 representes that electrode width is made as 35mm; Checking result when the checking result when Figure 10 representes that electrode width is made as 40mm, Figure 11 represent that electrode width is made as 50mm.
In addition, simulation yard has been implemented demonstration test to described simulation electric pole Installation Modes 1～8 in 1 route of 3 of 12 cores, 12 cores and 12 cores.In addition, the length of the fiber optic cables of employed 12 cores is 90m, 60m and 60m.
And the resistance value of the Support Level in each fiber optic cables of the resistance value of earth point and 12 cores is shown in following table 4.
[table 4]
| Project | Resistance value [Ω] |
| Ground connection | 95 |
| Support Level (12 core) | 10 |
| Support Level (12 cores; Differentiate the object cable) | 6 |
| Support Level (12 core) | 5 |
In this demonstration test,, can know in the time will differentiating an end ground connection of object cable that the performance that electric field detects embodies a small amount of difference, is the order of 35mm, 40mm, 50mm according to electrode width like Fig. 9, Figure 10 and shown in Figure 11, performance improves.
In addition, when judging, think that electrode width 35mm, 40mm and 50mm are no problem in differentiating performance, but when considering practical aspect and differentiating the reliability of performance, think that it is appropriate that electrode width is made as 40mm according to all conditions.
As stated; In the jaw type emf sensor 30 of this embodiment; Can detect magnetic field that produces according to the electric current that in differentiating the object cable, flows and the magnetic field that generates according to the voltage that on differentiation object cable, applies through 1 time clamping operation, play the action effect of the differentiation operability that can simplify cable significantly.
In addition; In the jaw type emf sensor 30 of this embodiment; Because electrode 31 has opposite face 31c, therefore can detect the electric field that the voltage that applies on the differentiation object cable according to laying such as in wall produces, play the action effect in the laying path that can confirm to differentiate the object cable.
In addition; In the jaw type emf sensor 30 of this embodiment; Through arranged outside magnetic core 33 at the butt joint end face 31b of electrode 31; Can guarantee among the butt joint end face 31b of electrode 31 about magnetic film area respect to one another, play the stable action effect of the characteristic that can realize magnetic core 33.
In addition; In above explanation; As emf sensor; Used in order to differentiate axially can being illustrated differentiating the jaw type emf sensor that the object cable carries out clamping of object cable easily, but be not limited to jaw type, for example also can use the magnetic core 33 of annular type to come the emf sensor of looping type through constituting.
The electromagnetic field detection portion 41 of receiver is according to voltage and/or induction current from 30 inputs of jaw type emf sensor; Detect electric field (voltage) and/or magnetic field (induction current); And output to totalizer 42 after detected induction current is transformed to voltage; But, take place sometimes because misinterpretation is carried out in the counteracting of the additive signal that the difference of the phase place of electric field detection signal and magnetic field detection signal causes.In order to prevent this misinterpretation, carry out the judgement of signal level through constituting detection electric field (voltage), and/or detect magnetic field (induction current) and carry out the judgement of signal level, the circuit structure of after this comprehensively judging can improve the differentiation performance.In addition; As other means that are used to prevent misinterpretation; Through constituting to amplifying behind detected electric field (voltage) signal rectification; And/or after detecting magnetic field (induction current) signal rectification, amplify, after this phase Calais carries out the circuit structure of the judgement of signal level, also can improve the differentiation performance.
In addition; As differentiating the object cable; Differentiation and the distribution route that for example clear fiber optic cables, but be not limited to fiber optic cables, the jaw type emf sensor 30 of this embodiment can be applied to various electric wires such as metallic communications cable or power cable, cable detected etc.
The explanation of symbol
1 electrode
3 magnetic cores
10 transmitters
11 signaler
12 amplifiers
13 coupling condensers
CT is used in 20 transmissions
30 jaw type emf sensors
31 electrodes
The 31a ring
The 31b end face
The 31c opposite face
32 insulators
The 32a insulation course
33 magnetic cores
The 33a metal level
34 coils
35 efferents
The 35a lead
The 35b lead
36 frameworks
36a magnetic core sheath
The 36b handle
40 receivers
41 electromagnetic field detection portions
42 totalizers
43 signal amplification/sensitivity adjustment portions
44 wave filters
45 signal level detection portions
46 report portion
Claims (5)
1. an emf sensor is characterized in that,
Possess:
Nonmagnetic material by having electric conductivity constitutes, and under the state that cable is axially passed through, surrounds the electrode of approximate ring-type of the part of this cable in a circumferential direction;
Constitute by magnetic, be configured in the magnetic core in the outside of the ring of said electrode via insulator;
The coil that on said magnetic core, twines; And
Draw from said electrode, from the double-end efferent of said coil,
From the induction current that said efferent output produces through electromagnetic induction according to the electric current that cable, flows, export the voltage that produces said electrode through electrostatic induction according at the voltage that cable applies from said efferent in said coil.
2. emf sensor according to claim 1 is characterized in that,
Said electrode presents approximate semicircular ground by configuration relatively in pairs, and the outside of tool directed loop is outstanding, when opening and closing, be in contact with one another the butt joint end face of separation, and has the opposite face of bending on respect to the opposite direction of this butt joint end face.
3. emf sensor according to claim 2 is characterized in that,
The said magnetic core of arranged outside along the butt joint end face of said electrode.
4. according to any described emf sensor in the claim 1 to 3, it is characterized in that,
Adjust the width of the length direction of said electrode and/or magnetic core, so that reach the output level that satisfies from the requirement of the receiver that is connected with said efferent.
5. receiver, its with said claim 1 to 4 in any described emf sensor be connected, it is characterized in that,
Possess:
Totalizer, its will from the input of said efferent based on the voltage of electrostatic induction and based on faradic voltage addition.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009-212074 | 2009-09-14 | ||
| JP2009212074A JP5723089B2 (en) | 2009-09-14 | 2009-09-14 | Electromagnetic field sensor and receiver |
| PCT/JP2010/065429 WO2011030796A1 (en) | 2009-09-14 | 2010-09-08 | Electromagnetic field sensor, and receiver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102498407A true CN102498407A (en) | 2012-06-13 |
| CN102498407B CN102498407B (en) | 2015-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201080040732.3A Expired - Fee Related CN102498407B (en) | 2009-09-14 | 2010-09-08 | Electromagnetic field sensor |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP5723089B2 (en) |
| KR (1) | KR101744206B1 (en) |
| CN (1) | CN102498407B (en) |
| HK (1) | HK1167896A1 (en) |
| WO (1) | WO2011030796A1 (en) |
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| TWI456233B (en) * | 2012-11-02 | 2014-10-11 | Electronics Testing Ct Taiwan | Near field electromagnetic probe |
| CN104569761A (en) * | 2014-12-31 | 2015-04-29 | 国家电网公司 | Live detection sensor for partial discharge of overhead cable |
| CN106841861A (en) * | 2017-01-11 | 2017-06-13 | 北京交通大学 | Cable recognition methods and system |
| CN108318939A (en) * | 2018-01-09 | 2018-07-24 | 国网山东省电力公司滨州供电公司 | A kind of cable line tester Special test clamp |
| CN108387268A (en) * | 2018-03-05 | 2018-08-10 | 上海歌尔泰克机器人有限公司 | High-tension line testing agency and high-tension line detector |
| CN109324235A (en) * | 2018-09-29 | 2019-02-12 | 国网山西省电力公司太原供电公司 | A kind of sensor device of cable connector electric field detection |
| CN110829266A (en) * | 2019-11-26 | 2020-02-21 | 长沙理工大学 | Power transmission line online electricity taking rolling obstacle crossing robot and application method thereof |
| CN111413579A (en) * | 2019-11-29 | 2020-07-14 | 国网河南省电力公司汝阳县供电公司 | Cable identification device |
| CN111766485A (en) * | 2020-07-20 | 2020-10-13 | 国网新疆电力有限公司乌鲁木齐供电公司 | Capacitive sensor for cable insulation detection and method of use thereof |
| CN113702749A (en) * | 2021-09-24 | 2021-11-26 | 温州大学 | Non-contact electric energy comprehensive measurement device and electric power internet of things system |
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- 2010-09-08 CN CN201080040732.3A patent/CN102498407B/en not_active Expired - Fee Related
- 2010-09-08 KR KR1020127005779A patent/KR101744206B1/en active IP Right Grant
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI456233B (en) * | 2012-11-02 | 2014-10-11 | Electronics Testing Ct Taiwan | Near field electromagnetic probe |
| CN104569761A (en) * | 2014-12-31 | 2015-04-29 | 国家电网公司 | Live detection sensor for partial discharge of overhead cable |
| CN106841861A (en) * | 2017-01-11 | 2017-06-13 | 北京交通大学 | Cable recognition methods and system |
| CN108318939A (en) * | 2018-01-09 | 2018-07-24 | 国网山东省电力公司滨州供电公司 | A kind of cable line tester Special test clamp |
| CN108318939B (en) * | 2018-01-09 | 2024-01-19 | 国网山东省电力公司滨州供电公司 | Special test clamp for cable path tester |
| CN108387268B (en) * | 2018-03-05 | 2021-01-22 | 上海歌尔泰克机器人有限公司 | High-voltage line detection mechanism and high-voltage line detector |
| CN108387268A (en) * | 2018-03-05 | 2018-08-10 | 上海歌尔泰克机器人有限公司 | High-tension line testing agency and high-tension line detector |
| CN109324235A (en) * | 2018-09-29 | 2019-02-12 | 国网山西省电力公司太原供电公司 | A kind of sensor device of cable connector electric field detection |
| CN110829266A (en) * | 2019-11-26 | 2020-02-21 | 长沙理工大学 | Power transmission line online electricity taking rolling obstacle crossing robot and application method thereof |
| CN110829266B (en) * | 2019-11-26 | 2021-09-24 | 长沙理工大学 | Power transmission line online electricity taking rolling obstacle crossing robot and application method thereof |
| CN111413579A (en) * | 2019-11-29 | 2020-07-14 | 国网河南省电力公司汝阳县供电公司 | Cable identification device |
| CN111413579B (en) * | 2019-11-29 | 2022-07-26 | 国网河南省电力公司汝阳县供电公司 | Cable identification device |
| CN111766485A (en) * | 2020-07-20 | 2020-10-13 | 国网新疆电力有限公司乌鲁木齐供电公司 | Capacitive sensor for cable insulation detection and method of use thereof |
| CN113702749A (en) * | 2021-09-24 | 2021-11-26 | 温州大学 | Non-contact electric energy comprehensive measurement device and electric power internet of things system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2011059070A (en) | 2011-03-24 |
| JP5723089B2 (en) | 2015-05-27 |
| HK1167896A1 (en) | 2012-12-14 |
| CN102498407B (en) | 2015-07-15 |
| WO2011030796A1 (en) | 2011-03-17 |
| KR101744206B1 (en) | 2017-06-07 |
| KR20120080167A (en) | 2012-07-16 |
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