CN107796750A - A kind of detection means of lossless audio coding aerial earth wire extent of corrosion - Google Patents
A kind of detection means of lossless audio coding aerial earth wire extent of corrosion Download PDFInfo
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- CN107796750A CN107796750A CN201711070052.6A CN201711070052A CN107796750A CN 107796750 A CN107796750 A CN 107796750A CN 201711070052 A CN201711070052 A CN 201711070052A CN 107796750 A CN107796750 A CN 107796750A
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- earth wire
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- aerial earth
- corrosion
- extent
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- 238000005260 corrosion Methods 0.000 title claims abstract description 67
- 230000007797 corrosion Effects 0.000 title claims abstract description 67
- 238000001514 detection method Methods 0.000 title claims abstract description 61
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 44
- 239000010959 steel Substances 0.000 claims abstract description 44
- 238000009413 insulation Methods 0.000 claims abstract description 35
- 230000006698 induction Effects 0.000 claims abstract description 16
- 230000005611 electricity Effects 0.000 claims description 10
- 238000009422 external insulation Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 description 21
- 238000000034 method Methods 0.000 description 13
- 238000004090 dissolution Methods 0.000 description 7
- 238000001228 spectrum Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000012956 testing procedure Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 241000370738 Chlorion Species 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- UBAZGMLMVVQSCD-UHFFFAOYSA-N carbon dioxide;molecular oxygen Chemical compound O=O.O=C=O UBAZGMLMVVQSCD-UHFFFAOYSA-N 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007850 degeneration Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/006—Investigating resistance of materials to the weather, to corrosion, or to light of metals
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/041—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body
Abstract
The invention discloses a kind of detection means of lossless audio coding aerial earth wire extent of corrosion, and for carrying out online piecewising algorithms detection to the steel strand wires as aerial earth wire, its structure includes：High frequency alternating signal occur from the reference electrode (1A) of detector (1), working electrode (1B), electrode (1C) and induction electrode (1D) are electrically connected by an electrode connecting line (2) with different annular clips (3) respectively；Annular clip (3) and to be measured section of Ohmic contact of aerial earth wire；The annular clip (3) of to be measured section and four of aerial earth wire is housed in the inside of insulation electro-magnetic shielding cover (4), and the both ends of the electro-magnetic shielding cover that insulate (4) are using insulation electromagnetic shielding plate (5) closure.The present invention can carry out lossless audio coding to the extent of corrosion for the aerial earth wire being actually on active service, and easy to detect, analysis is precisely, cost is cheap, is easy to promote.
Description
Technical field
The present invention relates to the safe operation of overhead system to monitor field, more particularly to a kind of lossless audio coding aerial earth wire
The detection means of extent of corrosion.
Background technology
An important factor for corrosion is influence operation of power networks long-term safety, the old-fashioned aerial electricity being particularly on active service more than 30 years
Net, its extent of corrosion become abnormal serious and complicated, and this degeneration and length of service on its performance has vital influence.
The corrosion process of overhead system is the electrochemical process based on participations such as moisture, oxygen and contaminant ions.With the steel of aerial earth wire
Exemplified by twisted wire, its corrosion process has the participations such as moisture, oxygen, carbon dioxide, chlorion, nitrate ion, sulfate ion
Zinc, iron rot process, phenomena such as crystal boundary change and corrosion product in this corrosion process are accumulated, to the remaining longevity of steel strand wires
Life directly affects.Telegram in reply maintenance is urgent, difficult, therefore the extremely necessary but traditional corrosion of corrosion early warning of aerial earth wire
Degree detecting method complex operation and with destructiveness, such as the mechanical test of tension test.
In recent years, there is the simple detection method of some aerial earth wire extent of corrosions.Such as it is superimposed based on short circuit current
Earth fault positioning technology, but this method only failure generation after can just alarm, it is impossible to earlier stage early warning with
Just safeguard；Measuring technology such as based on grounding resistance frequency sweep, can be used as lightning protection detection, but this method only for thunderbolt when
Discharge capacity, early warning is unable to daily aging fracture；Ground wire DC ice melting short circuit location technology such as based on analog signal feedback,
But this method is just for the failure of direct current ice melting system；In addition with a large amount of operational monitorings for being directed to OPGW
Technology.But the report of on-line corrosion monitoring early warning at these in the prior art, is not carried out to conventional overhead ground wire, also without specially
Profit protection.
A kind of single stock for aerial earth wire is proposed in the Chinese patent application of Application No. 201610894367.1
Line carries out extent of corrosion lossless detection method, and it is to the effect that by the mechanical property of different etching times and the height of single strand
Frequency alternating signal response frequency internal association, but the steel strand wires dissolution of partnership as aerial earth wire can only be entered horizontal electrical signal by this method
Test, can not realize no loss on-line monitoring.
The content of the invention
For above-mentioned weak point of the prior art, the invention provides a kind of corrosion of lossless audio coding aerial earth wire
The detection means of degree, can carry out lossless audio coding to the extent of corrosion of the aerial earth wire being actually on active service, it is easy to detect, point
Analysis is precisely, cost is cheap, is easy to promote.
The purpose of the present invention is achieved through the following technical solutions：
A kind of detection means of lossless audio coding aerial earth wire extent of corrosion, for the steel strand wires as aerial earth wire
Online piecewising algorithms detection is carried out, including：One high frequency alternating signal occurs to be provided with external insulation layer and electromagnetic screen with detector 1, four
Cover the annular clip 3, one of electrode connecting line 2, the four insulation electro-magnetic shielding cover 4 and two pieces of insulation electromagnetic shielding plates 5 of layer；
High frequency alternating signal occurs with the reference electrode 1A of detector 1, working electrode 1B, to electrode 1C and induction electrode 1D
Electrically connected respectively by an electrode connecting line 2 from different annular clips 3, and connect reference electrode 1A electrode connecting line
2 mutually wind with the electrode connecting line 2 being connected to electrode 1C, and connect working electrode 1B electrode connecting line 2 with being connected sensing
Electrode 1D electrode connecting line 2 is mutually wound；
Connection is to Ohmic contact on the outside of electrode 1C annular clip 3 and the left end of to be measured section of aerial earth wire, connection reference electricity
Pole 1A annular clip 3 and Ohmic contact on the inside of the left end of to be measured section of aerial earth wire, connection induction electrode 1D annular clip 3
With to be measured section of right-hand member inner side Ohmic contact of aerial earth wire, connection working electrode 1B annular clip 3 and to be measured section of aerial earth wire
Right-hand member on the outside of Ohmic contact；To be measured section and four annular clip 3 of aerial earth wire is housed in the inside of insulation electro-magnetic shielding cover 4,
And the both ends for the electro-magnetic shielding cover 4 that insulate are blocked using insulation electromagnetic shielding plate 5.
Preferably, the contact area of each annular clip 3 and to be measured section of aerial earth wire is 15~35cm2。
Preferably, connect between electrode 1C annular clip 3 and connection reference electrode 1A annular clip 3 at a distance of 0.5
~1cm；Connect between induction electrode 1D annular clip 3 and connection working electrode 1B annular clip 3 at a distance of 0.5~1cm.
Preferably, the length of the insulation electro-magnetic shielding cover 4 is 50~500cm.
Preferably, it is 1~100000Hz that the high frequency alternating signal, which occurs with the frequency range of detector 1,.
As seen from the above technical solution provided by the invention, lossless audio coding aerial earth wire provided by the invention is rotten
The detection means of degree of corrosion with high frequency alternating signal by that will occur four annular clips 3 being connected with detector 1 according to " connection
Annular clip 3, connection reference electrode 1A annular clip 3 to electrode 1C, connection induction electrode 1D annular clip 3, connection
Working electrode 1B annular clip 3 " is sequentially clipped in be measured section of aerial earth wire, and uses insulation electro-magnetic shielding cover 4 by aerial earth wire
To be measured section and four annular clip 3 is covered on inside it, using insulation electromagnetic shielding plate 5 by insulate electro-magnetic shielding cover 4 two end seals
It is stifled, then control high frequency alternating signal to occur to send the alternating signal of certain frequency with detector 1, and receive corresponding detection telecommunications
Number, draw detection electric signal so as to which can carries out contrast by the detectable signal of aerial earth wire before detecting electric signal and corroding
Degrees of offset, being associated further according to the detection electric signal departure degree measured in advance with steel strand wires extent of corrosion can judge to make somebody a mere figurehead
The extent of corrosion that to be measured section of ground wire.The detection means of lossless audio coding aerial earth wire extent of corrosion provided by the invention can be right
To be measured section of the aerial earth wire to insulate in electro-magnetic shielding cover 4 carries out once quick test, when one section of to be measured section of aerial earth wire has been tested
Cheng Hou, it is movable to next section and continues to test, so as to which not dissolution of partnership easily can be carried out to the steel strand wires as aerial earth wire
Precisely detection and analysis paragraph by paragraph.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Accompanying drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for this
For the those of ordinary skill in field, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 provides the structural representation of the detection means of lossless audio coding aerial earth wire extent of corrosion for the embodiment of the present invention
Figure.
Fig. 2 is the full spectrum admittance signal of the steel strand wires that different cycles are simulated in laboratory accelerated corrosion in the embodiment of the present invention 1
Figure.
Fig. 3 is the low-frequency impedance signal of the steel strand wires that different cycles are simulated in laboratory accelerated corrosion in the embodiment of the present invention 1
Figure.
Fig. 4 is the full spectrum admittance signal figure of steel strand wires in the embodiment of the present invention 2.
Fig. 5 is the low-frequency impedance signal graph of steel strand wires in the embodiment of the present invention 2.
Embodiment
With reference to the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Ground describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.Based on this
The embodiment of invention, the every other implementation that those of ordinary skill in the art are obtained under the premise of creative work is not made
Example, belongs to protection scope of the present invention.
The detection means of lossless audio coding aerial earth wire extent of corrosion provided by the present invention is retouched in detail below
State.The content not being described in detail in the embodiment of the present invention belongs to prior art known to professional and technical personnel in the field.
As shown in figure 1, a kind of detection means of lossless audio coding aerial earth wire extent of corrosion, for as aerial
The steel strand wires of line carry out the online piecewising algorithms detection of not dissolution of partnership, and its concrete structure includes：One high frequency alternating signal occurs and detection
The annular clip 3, one of electrode connecting line 2, the four insulation electromagnetic shielding that device 1, four is provided with external insulation layer and electro-magnetic screen layer
Cover 4 and two pieces of insulation electromagnetic shielding plates 5；High frequency alternating signal occurs and the reference electrode 1A of detector 1, working electrode 1B, right
Electrode 1C and induction electrode 1D is electrically connected by an electrode connecting line 2 from different annular clips 3 respectively, and connects reference
Electrode 1A electrode connecting line 2 is mutually wound with the electrode connecting line 2 being connected to electrode 1C, and connects working electrode 1B electrode
Connecting line 2 is mutually wound with being connected induction electrode 1D electrode connecting line 2.Connect the annular clip 3 to electrode 1C and aerial ground
Ohmic contact on the outside of the left end that to be measured section of line, connect in reference electrode 1A annular clip 3 and the left end of to be measured section of aerial earth wire
Side Ohmic contact, connection induction electrode 1D annular clip 3 and Ohmic contact on the inside of the right-hand member of to be measured section of aerial earth wire, connects work
Make Ohmic contact on the outside of electrode 1B annular clip 3 and the right-hand member of to be measured section of aerial earth wire.To be measured section and four rings of aerial earth wire
Shape clip 3 is housed in the inside of insulation electro-magnetic shielding cover 4, and the both ends for the electro-magnetic shielding cover 4 that insulate are electromagnetically shielded using insulation
Plate 5 blocks.
Wherein, the detection means of the lossless audio coding aerial earth wire extent of corrosion can include embodiments below：
(1) the actual in commission steel strand wires as aerial earth wire are segmented in the case of not dissolution of partnership in order to realize
Detection, the annular clip 3 needs to be directly sandwiched on more strands of the steel strand wires as aerial earth wire, and each annular snap
The contact area of folder 3 and to be measured section of aerial earth wire is preferably 15~35cm2, while conductive paste is preferred and realizes annular clip 3
With to be measured section of large area Ohmic contact of aerial earth wire, this can effectively eliminate contact resistance.In actual applications, annular clip
3 size is preferably to match with the fineness of the steel strand wires as aerial earth wire, so as to which annular clip 3 is treated with aerial earth wire
The contact area for surveying section depends primarily on the contact width of annular clip 3 and to be measured section of aerial earth wire, and annular clip 3 and frame
The contact width that to be measured section of vacant lot line is preferably 5~10cm.In addition, annular clip 3 is clipped on aerial earth wire for convenience, annular
Structure of the clip 3 preferably with upper and lower folding.
(2) " connect to Ohmic contact on the outside of electrode 1C annular clip 3 and the left end of to be measured section of aerial earth wire, connection ginseng
Annular clip 3 than electrode 1A and Ohmic contact on the inside of the left end of to be measured section of aerial earth wire, connection induction electrode 1D annular snap
Folder 3 and Ohmic contact on the inside of the right-hand member of to be measured section of aerial earth wire, connection working electrode 1B annular clip 3 and aerial earth wire are to be measured
" left end ", " right-hand member ", " inner side " and " outside " in Ohmic contact on the outside of the right-hand member of section " the words is merely to represent a kind of phase
To position relationship, that is to say, that position relationship of four annular clips 3 on to be measured section of aerial earth wire is according to " connecting to electricity
Pole 1C annular clip 3, connection reference electrode 1A annular clip 3, connection induction electrode 1D annular clip 3, connection work
The electrode 1B order of annular clip 3 " arranges.Connect to annular clip 3 of the electrode 1C annular clip 3 with being connected reference electrode 1A
Between preferably at a distance of 0.5~1cm, between connection induction electrode 1D annular clip 3 and connection working electrode 1B annular clip 3
Preferably at a distance of 0.5~1cm, this can highlight the accuracy of four electrode method test.In order to take into account the detection accuracy of segmentation detection
And detection efficiency, the length of the insulation electro-magnetic shielding cover 4 is preferably 50~500cm.
(3) in order to ensure that testing result has the preferable degree of accuracy, the frequency with detector 1 occurs for the high frequency alternating signal
Rate scope is preferably 1~100000Hz, and the high frequency alternating signal occurs to use with the detection electric signal of detector 1
One or more in impedance, admittance, electric modulus, plural dielectric.
(4) to be measured section and four annular clip 3 of aerial earth wire is housed in the inside of insulation electro-magnetic shielding cover 4, and insulate
The both ends of electro-magnetic shielding cover 4 are blocked using insulation electromagnetic shielding plate 5, so as to realize complete electricity in the electro-magnetic shielding cover 4 that insulate
Magnetic screen.The insulation electro-magnetic shielding cover 4 is provided with shielding cover opening 41 vertically, so that insulation electro-magnetic shielding cover 4 can be straight
Connect and cover on actual in commission aerial earth wire inside it.The center of the insulation electromagnetic shielding plate 5 is provided with through hole 51, and institute
State and be radially provided with barricade opening 52 on insulation electromagnetic shielding plate 5, so that the insulation electromagnetic shielding plate 5 can be enclosed on reality
On the in commission aerial earth wire in border.In actual applications, the insulation electro-magnetic shielding cover 4 can be the electromagnetism with insulated liner
Radome 4, the insulation electromagnetic shielding plate 5 can be the electromagnetic shielding plate with insulated liner；The insulation electro-magnetic shielding cover 4
Preferably cylindrical, the insulation electromagnetic shielding plate 5 is preferably plectane.
Specifically, steel strand wires are detected when using the detection means of the lossless audio coding aerial earth wire extent of corrosion
When, first by four annular clips 3 according to " connect the annular clip 3 to electrode 1C, connection reference electrode 1A annular clip 3,
Connection induction electrode 1D annular clip 3, connection working electrode 1B annular clip 3 " is sequentially clipped in be measured section of steel strand wires, then
To be measured section and four annular clip 3 of steel strand wires is covered on inside it using insulation electro-magnetic shielding cover 4, and using insulation electromagnetic shielding
Plate 5 blocks the both ends for the electro-magnetic shielding cover 4 that insulate, then controls high frequency alternating signal to occur to send certain frequency model with detector 1
The alternating signal enclosed, and detection electric signal corresponding to reception, then pass through the spy of aerial earth wire before detecting electric signal and corroding
Survey signal to be contrasted, it can be deduced that detection electric signal degrees of offset.The detection of steel strand wires under different abrasion cycles is detected in advance
Electric signal degrees of offset, and lost by testing the core diameters of steel strand wires under different abrasion cycles with tensile strength loss to steel
The extent of corrosion of twisted wire judges, and so as to which detection electric signal departure degree is associated with steel strand wires extent of corrosion, draws
The electric signal basis for estimation of steel strand wires extent of corrosion.In the detection means using the lossless audio coding aerial earth wire extent of corrosion
When carrying out the detection of not dissolution of partnership online piecewising algorithms to the steel strand wires as aerial earth wire being actually on active service, it can detect that aerial earth wire is treated
The detection electric signal degrees of offset of section is surveyed, associates with steel strand wires extent of corrosion further according to detection electric signal departure degree and can determine whether
Go out the extent of corrosion of to be measured section of aerial earth wire.The detection means of the lossless audio coding aerial earth wire extent of corrosion can be to insulation
To be measured section of aerial earth wire in the length of electro-magnetic shielding cover 4 carries out once quick test, when one section of to be measured section of aerial earth wire has been tested
Cheng Hou, it is movable to next section and continues to test, so as to which not dissolution of partnership easily can be carried out to the steel strand wires as aerial earth wire
Precisely detection and analysis paragraph by paragraph.
Further, the detection means of the lossless audio coding aerial earth wire extent of corrosion at least has advantages below：
(1) detection means of lossless audio coding aerial earth wire extent of corrosion provided by the present invention can be according to insulated electro
The length of magnetic shielding cover 4 is once quickly tested, and after the completion of the to be measured section of test of one section of aerial earth wire, is movable to next section of continuation
Test, so as to easily can precisely be tested and analyzed to carrying out the piecewise of not dissolution of partnership as the steel strand wires of aerial earth wire.
(2) detection means of lossless audio coding aerial earth wire extent of corrosion provided by the invention is tested using four-wire method,
And contact area is increased by annular clip, influenceed so as to effectively eliminate contact resistance, improve accuracy.
(3) detection means of lossless audio coding aerial earth wire extent of corrosion provided by the present invention passes through the electromagnetic screen that insulate
Covering cover 4 and insulation electromagnetic shielding plate 5 makes to realize complete electromagnetic shielding in insulation electro-magnetic shielding cover 4, and by the way that connection is joined
Electrode connecting line 2 than electrode 1A will connect working electrode 1B electricity with being connected the 2 mutual winding of electrode connecting line to electrode 1C
Pole connecting line 2 is mutually wound with being connected induction electrode 1D electrode connecting line 2, and so as to effectively eliminate electromagnetic interference, this can
Make testing result more accurate.
As fully visible, the embodiment of the present invention can carry out lossless online inspection to the extent of corrosion for the aerial earth wire being actually on active service
Survey, easy to detect, analysis is precisely, cost is cheap, is easy to promote.
In order to more clearly from show technical scheme provided by the present invention and caused technique effect, below with tool
The detection means of lossless audio coding aerial earth wire extent of corrosion provided by the present invention is described in detail body embodiment.
Embodiment 1
Using the detection means of lossless audio coding aerial earth wire extent of corrosion provided by the present invention to known corrosion journey
The steel strand wires of the laboratory accelerated corrosion simulation of degree are tested, and its testing procedure is as follows：
(1) detection means of lossless audio coding aerial earth wire extent of corrosion provided by the present invention and laboratory are accelerated
The 5 meters long GJ-35 steel strands connection of corrosion simulated different cycles, it is to be measured.
(2) control high frequency alternating signal to occur to send 10~10000Hz alternating signal with detector 1, detect steel strand wires
Full spectrum admittance signal and low-frequency impedance signal.
(3) the admittance extreme frequencies and D.C. resistance of steel strand wires under each abrasion cycle are extracted, and to both detection electricity
Signal carries out comprehensive analysis, draws the departure degree of detection electric signal and detection electric signal before corrosion；By testing different corrosion
The core diameters loss of steel strand wires judges with tensile strength loss to the extent of corrosion of steel strand wires under cycle, will detect telecommunications
Number departure degree associated with steel strand wires extent of corrosion, draw the electric signal basis for estimation of steel strand wires extent of corrosion.
Specifically, the full spectrum admittance signal of the steel strand wires of the laboratory accelerated corrosion simulation different cycles in above-mentioned test can
With as shown in Fig. 2 the low-frequency impedance signal of the steel strand wires of laboratory accelerated corrosion simulation different cycles in above-mentioned test can be with
As shown in Figure 3；It can be seen that by Fig. 2 and Fig. 3：According to micro-structural in the prior art and Mechanical test results, " thread-changing foundation is
Lose 20% tensile strength, corresponding to corrode 54 cycles ", and according to the detection electric signal tester in the embodiment of the present invention 1
Calculate now can service life be 51 cycles, less than abrasion cycle, it should thread-changing, be identical with Mechanical test results.
Embodiment 2
Using the detection means of lossless audio coding aerial earth wire extent of corrosion provided by the present invention to unknown corrosion journey
The steel strand wires of the actual military service different time in field of degree are tested, and its testing procedure is as follows：
(1) by the detection means of lossless audio coding aerial earth wire extent of corrosion provided by the present invention and the actual clothes in field
Labour different time (the BT631 lines being on active service 27 years under the XF781 lines be on active service 47 years under slight pollution environment, serious pollution environment)
5 meters long GJ-35 steel strands connection, it is to be measured.
(2) control high frequency alternating signal to occur to send 10~10000Hz alternating signal with detector 1, detect steel strand wires
Full spectrum admittance signal and low-frequency impedance signal.
(3) the admittance extreme frequencies and D.C. resistance of each unknown extent of corrosion steel strand wires are extracted, and to both detections
Electric signal carries out comprehensive analysis, draws the departure degree of detection electric signal and detection electric signal before corrosion, you can judges that tapping twists
The extent of corrosion of line, predict residual life.
Specifically, the full spectrum admittance signal of the steel strand wires in above-mentioned test can be with as shown in figure 4, the steel in above-mentioned test twists
The low-frequency impedance signal of line can be as shown in Figure 5；It can be seen that by Fig. 4 and Fig. 5：Detection electricity according to embodiments of the present invention 2
Signal testing calculating XF781 line residual lifes are 39 years, BT631 line residual lifes are 15 years.
As fully visible, the embodiment of the present invention can carry out lossless online inspection to the extent of corrosion for the aerial earth wire being actually on active service
Survey, easy to detect, analysis is precisely, cost is cheap, is easy to promote.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art is in the technical scope of present disclosure, the change or replacement that can readily occur in,
It should all be included within the scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims
Enclose and be defined.
Claims (5)
- A kind of 1. detection means of lossless audio coding aerial earth wire extent of corrosion, for entering to the steel strand wires as aerial earth wire Row online piecewising algorithms detect, it is characterised in that including：One high frequency alternating signal occurs to be provided with external insulation with detector (1), four The electrode connecting line (2) of layer and electro-magnetic screen layer, four annular clips (3), an insulation electro-magnetic shielding cover (4) and two pieces of insulation Electromagnetic shielding plate (5)；High frequency alternating signal occurs with the reference electrode (1A) of detector (1), working electrode (1B), to electrode (1C) and induced electricity Pole (1D) is electrically connected by an electrode connecting line (2) from different annular clips (3) respectively, and connects reference electrode (1A) Electrode connecting line (2) electrode (1C) electrode connecting line (2) is mutually wound with being connected, and connect working electrode (1B) electricity Pole connecting line (2) is mutually wound with being connected induction electrode (1D) electrode connecting line (2)；Connection is to Ohmic contact on the outside of the annular clip (3) of electrode (1C) and the left end of to be measured section of aerial earth wire, connection reference electricity The annular clip (3) of pole (1A) and Ohmic contact on the inside of the left end of to be measured section of aerial earth wire, the annular of connection induction electrode (1D) Clip (3) and Ohmic contact on the inside of the right-hand member of to be measured section of aerial earth wire, the annular clip (3) of connection working electrode (1B) is with making somebody a mere figurehead Ohmic contact on the outside of the right-hand member that to be measured section of ground wire；The annular clip (3) of to be measured section and four of aerial earth wire is housed in the inside of insulation electro-magnetic shielding cover (4), and the electromagnetism that insulate The both ends of radome (4) are using insulation electromagnetic shielding plate (5) closure.
- 2. the detection means of lossless audio coding aerial earth wire extent of corrosion according to claim 1, it is characterised in that every Individual annular clip (3) and the contact area of to be measured section of aerial earth wire are 15~35cm2。
- 3. the detection means of lossless audio coding aerial earth wire extent of corrosion according to claim 1 or 2, its feature exist In, connect between the annular clip (3) of electrode (1C) and the annular clip (3) for being connected reference electrode (1A) at a distance of 0.5~ 1cm；Connect between annular clip (3) and the annular clip (3) for being connected working electrode (1B) of induction electrode (1D) apart 0.5~ 1cm。
- 4. the detection means of lossless audio coding aerial earth wire extent of corrosion according to claim 1 or 2, its feature exist In the length of the insulation electro-magnetic shielding cover (4) is 50~500cm.
- 5. the detection means of lossless audio coding aerial earth wire extent of corrosion according to claim 1 or 2, its feature exist In it is 1~100000Hz that the high frequency alternating signal, which occurs with the frequency range of detector (1),.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711070052.6A CN107796750B (en) | 2017-11-03 | 2017-11-03 | Detection device for nondestructive online detection of corrosion degree of overhead ground wire |
Applications Claiming Priority (1)
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