CN106814277B - A kind of detection method of the electrode plate Joint's falling off on electrothermal concrete road surface - Google Patents
A kind of detection method of the electrode plate Joint's falling off on electrothermal concrete road surface Download PDFInfo
- Publication number
- CN106814277B CN106814277B CN201710084116.1A CN201710084116A CN106814277B CN 106814277 B CN106814277 B CN 106814277B CN 201710084116 A CN201710084116 A CN 201710084116A CN 106814277 B CN106814277 B CN 106814277B
- Authority
- CN
- China
- Prior art keywords
- measuring point
- magnetic field
- falling
- route
- electrode plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Road Paving Structures (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Cleaning Of Streets, Tracks, Or Beaches (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Locating Faults (AREA)
Abstract
The invention discloses a kind of detection methods of the electrode plate Joint's falling off on electrothermal concrete road surface, comprising steps of S1: the current strength I of each power supply branch line in measurement electrothermal concrete road surfacei, and judge whether each power supply branch line is suspected malfunctions route, in which: i >=1；S2: each suspected malfunctions route is powered, using electromagnetic field tester measure each firewire, on zero curve measuring point magnetic field strength；S3: pass through formulaCalculate the magnetic field strength ratio of firewire, the corresponding each measuring point of zero curve, in which: RiFor the magnetic field strength ratio of i-th of measuring point, mli、mniRespectively firewire, on zero curve i-th of measuring point magnetic field strength；S4: by each magnetic field strength than calculating magnetic field change rate of strength, and the position of electrode plate Joint's falling off is determined by change rate of magnetic density.Using method provided by the invention, it quickly can accurately determine the specific location of electrode plate Joint's falling off, realize electrothermal concrete road surface electrode plate Joint's falling off Nondestructive.
Description
Technical field
The present invention relates to electrothermal concrete pavement technique fields more particularly to a kind of electrode plate on electrothermal concrete road surface to connect
The detection method that head falls off.
Background technique
A large amount of investigation and researches show that, the quality of pavement behavior is one of an important factor for influencing road traffic.Especially
It often brings and seriously affects to the unimpeded and traffic safety of road, or even cause when road snow or icing in cold winter
Highway and socked-in, make troubles to passenger and freight transportation, to cause huge economic loss.China has a vast territory, for many years
The area of average product day of snow number >=30 day accounts for the 56% of national territory, including China northeast and western two major parts.Even exist
Also there is the especially big ice disaster at the beginning of similar 2008 in southern region of China, causes many places socked-in.Therefore, in order to ensure
Road is unimpeded and traffic safety, and improves the operating benefit on road and airport, takes quick, effective, the undamaged measure of road pavement
Ice and snow on road surfaces is removed, a great job for various countries in the maintenance of cold district winter road is become.
At present, common deicing method mainly has artificial removing method, mechanical removal method and hot snow melt method and chemical thaw
Method, wherein manually removing method, low efficiency, costly, the activity duration is long.Mechanical removal method is high-efficient, is suitble to large area mechanization
Operation is removed, but removes and is not thorough, and snow removal with machine equipment frequency of use is low, deficiency in economic performance.Chemical thaw method is to pass through
Salting reduces the freezing point of water, achievees the purpose that make snow melting, which has that effect is good, material source is wide, cheap etc.
Advantage.But under conditions of moist for a long time, the chloride ion in the salt of spreading can cause steel on concrete road surface and bridge floor
The corrosion of concrete steel fiber reduces the service life of highway bridge, and pollutes environment, and the functions such as conducting concrete, electric heating cable
The research of material is provided for the deicing or snow melting of road and airfield runway and is more preferably selected.
Electrothermal concrete since it is both construction material and functional material, it is convenient while again environmentally protective that support by construction pipe,
It can be used for being laid with road surface, snow melt deicing.During being laid with electrothermal concrete, electrode contact easily falls off, and causes part very
To whole road section surface power supply trouble, cause electrothermal concrete road surface that cannot generate heat snow melt deicing.Since falling-off connector is embedded in hardening
Electrothermal concrete in, cannot visually find, electrothermal concrete can only be chiseled and checked one by one.This inspection method is with blindly
Property, heavy workload, while this method is that one kind damages detection method.
Summary of the invention
In view of the shortcomings of the prior art, it is de- that the object of the present invention is to provide a kind of electrode plate connectors on electrothermal concrete road surface
The detection method fallen can quickly, accurately determine the specific position of the electrode plate Joint's falling off on electrothermal concrete road surface by this method
It sets, realizes electrothermal concrete road surface electrode plate Joint's falling off Nondestructive.
To achieve the above object, the present invention provides a kind of detection sides of the electrode plate Joint's falling off on electrothermal concrete road surface
Method includes the following steps:
S1: the current strength I of each power supply branch line in measurement electrothermal concrete road surfacei, and whether judge each power supply branch line
For suspected malfunctions route, in which: i >=1；
S2: each suspected malfunctions route is powered, and respectively on the firewire, zero curve of each suspected malfunctions route according to pre-
If distance takes equidistant measuring point, using electromagnetic field tester measure each firewire, on zero curve measuring point magnetic field strength；
S3: pass through formulaCalculate the magnetic field strength ratio of firewire, the corresponding each measuring point of zero curve, in which: RiIt is
The magnetic field strength ratio of i measuring point, mli、mniRespectively firewire, on zero curve i-th of measuring point magnetic field strength, i >=1；
S4: by each magnetic field strength than calculating magnetic field change rate of strength, and electrode is determined by change rate of magnetic density
The position of plate Joint's falling off.
Compared with prior art, the detection method of the electrode plate Joint's falling off on electrothermal concrete road surface disclosed by the invention,
The electric current of each power supply branch line is measured using split-core type meter, and average current is calculated, by the electric current for judging each power supply branch line
Whether average current is less than, to filter out suspected malfunctions route；By being selected on the firewire of each suspected malfunctions route, zero curve
Measuring point is taken, and measures the magnetic field strength of each measuring point using electromagnetic field measurements instrument, the magnetic field strength ratio of each measuring point is calculated,
It further calculates to obtain the change rate of magnetic density of each measuring point, by judging whether the change rate of magnetic density of each measuring point is located
In preset threshold range, so that it is determined that whether there is electrode plate Joint's falling off in the corresponding suspected malfunctions route of each measuring point, and
The specific location of electrode plate Joint's falling off.Detection method provided by the invention solves the detection heavy workload, blind of the prior art
Mesh and be the problem of damaging detection obtain it is easy to operate, it is quickly accurate to determine that electrode plate connects in electrothermal concrete road surface
Whether head falls off, and the beneficial effect of the specific location to fall off, and it is lossless to realize electrothermal concrete road surface electrode plate Joint's falling off
Diagnosis.
Another specific embodiment according to the present invention, step S1 include the following steps:
S11: using the current strength I of each power supply branch line in split-core type meter measurement electrothermal concrete road surfacei, in which: i >=1；
S12: according to each current strength Ii, average current intensity I is calculateda, in which: i >=1；
S13: each current strength I is judged respectivelyiWhether average current intensity I is less thana, if so, current strength is corresponding
Power supply branch line is suspected malfunctions route.
Another specific embodiment according to the present invention, in step s 2, pre-determined distance are electrode plate connector spacing.
Another specific embodiment according to the present invention, step S4 include the following steps:
S41: pass through formulaCalculate the change rate of magnetic density of each measuring point, in which: biIt is surveyed for i-th
The change rate of magnetic density of point, RiFor the magnetic field strength ratio of i-th of measuring point, d is measuring point spacing, i >=1；
S42: judge change rate of magnetic density biWhether between preset threshold range；
S43: according to the judging result of step S42, determine suspected malfunctions route with the presence or absence of electrode plate Joint's falling off, and electricity
The specific location of pole plate Joint's falling off.
Another specific embodiment according to the present invention, in step S43, if the change rate of magnetic density b of each measuring pointi
It is between the preset threshold range, it is determined that electrodeless plate Joint's falling off in the suspected malfunctions route.
Another specific embodiment according to the present invention, in step S43, if the change rate of magnetic density b of i-th of measuring pointiIt is small
In preset threshold range lower limit, then on the firewire of the corresponding suspected malfunctions route of the measuring point between i-th of measuring point and i+1 measuring point
There are electrode plate Joint's falling offs.
Another specific embodiment according to the present invention, in step S43, if the change rate of magnetic density b of i-th of measuring pointiGreatly
In the preset threshold range upper limit, then on the zero curve of the corresponding suspected malfunctions route of the measuring point between i-th of measuring point and i+1 measuring point
There are electrode plate Joint's falling offs.
Another specific embodiment according to the present invention, preset threshold range are (- 5,5).
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Detailed description of the invention
Fig. 1 is the flow chart of detection method in embodiment 1；
Fig. 2 is the specific flow chart of step in Fig. 1.
Specific embodiment
Embodiment 1
It is the knot of the detection method of the electrode plate Joint's falling off on electrothermal concrete road surface provided in this embodiment referring to Fig. 1
Structure schematic diagram.The detection method includes step S1-S4:
S1: the current strength I of each power supply branch line in measurement electrothermal concrete road surfacei, and whether judge each power supply branch line
For suspected malfunctions route, in which: i >=1.
The step is for obtaining suspected malfunctions route.Specifically, referring to fig. 2, step includes step S11-S13:
S11: using the current strength I of each power supply branch line in split-core type meter measurement electrothermal concrete road surfacei, in which: i >=1.
The step is used to measure the current strength of each power supply straight line.Preferably, in the present embodiment, split-core type meter is used at the scene
The current strength of each power supply branch line in electrothermal concrete road surface is measured, and records the current strength I of each power supply branch linei.Specifically
When implementation, the current strength of other each power supply branch lines in measurement component measurement electrothermal concrete road surface can also be used.
S12: according to each current strength Ii, average current intensity I is calculateda, in which: i >=1.
The step obtains average current intensity I for calculating average current intensitya.When it is implemented, the calculation method is adopted
With general average calculation method, it is not particularly limited herein.
S13: each current strength I is judged respectivelyiWhether average current intensity I is less thana, if so, current strength is corresponding
Power supply branch line is suspected malfunctions route.
The step is for determining suspected malfunctions route.Specifically, judging each current strength I respectivelyiIt is strong with average current
Spend IaSize relation, if current strength IiLess than average current intensity Ia, then current strength IiCorresponding i-th power supply straight line
For suspected malfunctions route.The rest may be inferred, obtains each suspected malfunctions route in power supply branch line.
S2: each suspected malfunctions route is powered, and respectively on the firewire, zero curve of each suspected malfunctions route according to pre-
If distance takes equidistant measuring point, using electromagnetic field tester measure each firewire, on zero curve measuring point magnetic field strength.
The step measures for taking measuring point on the firewire, zero curve of suspected malfunctions route and obtains the magnetic field of each measuring point
Intensity.Specifically, taking equidistant measuring point, this implementation according to pre-determined distance on the firewire, zero curve of each suspected malfunctions route
In example, it is preferred that pre-determined distance is electrode plate connector spacing, i.e., adjacent two survey on the firewire of each suspected malfunctions route, zero curve
Distance between point is equal with electrode plate connector spacing.Each suspected malfunctions route is powered, is measured using electromagnetic field tester every
The magnetic field strength of measuring point on one firewire, zero curve.
S3: pass through formulaCalculate the magnetic field strength ratio of firewire, the corresponding each measuring point of zero curve, in which: RiIt is
The magnetic field strength ratio of i measuring point, mli、mniRespectively firewire, on zero curve i-th of measuring point magnetic field strength, i >=1.
The step is used to be calculated the magnetic field strength ratio of the corresponding each measuring point of firewire, zero curve.Specifically, by firewire
The magnetic field strength of first measuring point obtains the magnetic field strength ratio of first measuring point divided by the magnetic field strength of first measuring point on zero curve,
And so on, it is calculated in each suspected malfunctions route, the magnetic field strength ratio of each measuring point.
S4: by each magnetic field strength than calculating magnetic field change rate of strength, and electrode is determined by change rate of magnetic density
The position of plate Joint's falling off.
The step is for determining in each suspected malfunctions route with the presence or absence of electrode plate Joint's falling off, and if it exists, further
Determine the specific location of electrode plate Joint's falling off in the suspected malfunctions route.
Specifically, the step specifically includes step S41-S43:
S41: pass through formulaCalculate the change rate of magnetic density of each measuring point, in which: biIt is surveyed for i-th
The change rate of magnetic density of point, RiFor the magnetic field strength ratio of i-th of measuring point, d is measuring point spacing, i >=1.
The step is used for calculating magnetic field change rate of strength.Specifically, by the two neighboring measuring point obtained by step S3 it
Between magnetic field strength difference obtain change rate of magnetic density divided by measuring point spacing.Measuring point spacing is each suspected malfunctions route
Firewire, the distance on zero curve between adjacent two measuring point.Due between adjacent two measuring point on the firewire of each suspected malfunctions route, zero curve
Distance it is equal with electrode plate connector spacing.Therefore in the present embodiment, this measuring point spacing is equal to electrode plate connector spacing.With such
It pushes away, is calculated in each suspected malfunctions route, the change rate of magnetic density of each measuring point.
S42: judge change rate of magnetic density biWhether between preset threshold range.
Whether the change rate of magnetic density for each measuring point that the step is used to judge to be calculated by step S41 is in pre-
If between threshold range.In the present embodiment, it is preferred that preset threshold range is (- 5,5).
S43: according to the judging result of step S42, determine suspected malfunctions route with the presence or absence of electrode plate Joint's falling off, and electricity
The specific location of pole plate Joint's falling off.
Specifically, in this step, if the change rate of magnetic density b of each measuring pointiIt is in the preset threshold
Between range, it is determined that electrodeless plate Joint's falling off in the suspected malfunctions route.
If the change rate of magnetic density b of i-th of measuring pointiLess than preset threshold range lower limit, then the measuring point is corresponding doubtful
There are electrode plate Joint's falling offs between i-th of measuring point and i+1 measuring point on the firewire of faulty line.
If the change rate of magnetic density b of i-th of measuring pointiGreater than the preset threshold range upper limit, then the measuring point is corresponding doubtful
There are electrode plate Joint's falling offs between i-th of measuring point and i+1 measuring point on the zero curve of faulty line.
In the present embodiment, it is preferred that preset threshold range is (- 5,5) m-1.Work as biGreater than -5m-1And it is less than 5m-1When,
Then electrodeless plate Joint's falling off in the corresponding suspected malfunctions route of the measuring point；Work as biLess than -5m-1When, then the measuring point is corresponding doubts
There are electrode plate Joint's falling offs between i-th of measuring point and i+1 measuring point on firewire like faulty line；Work as biGreater than 5m-1When, then
There are electrode plate Joint's falling offs between i-th of measuring point and i+1 measuring point on the zero curve of the corresponding suspected malfunctions route of the measuring point.
The detection method of the electrode plate Joint's falling off on electrothermal concrete road surface provided in this embodiment is measured every using split-core type meter
The electric current of one power supply branch line, and average current is calculated, by judging whether the electric current of each power supply branch line is less than average electricity
Stream, to filter out suspected malfunctions route；By choosing measuring point on the firewire of each suspected malfunctions route, zero curve, and use
Electromagnetic field measurements instrument measures the magnetic field strength of each measuring point, and the magnetic field strength ratio of each measuring point is calculated, further calculates
To the change rate of magnetic density of each measuring point, by judging whether the change rate of magnetic density of each measuring point is in preset threshold model
It encloses, so that it is determined that de- with the presence or absence of electrode plate Joint's falling off and electrode plate connector in the corresponding suspected malfunctions route of each measuring point
The specific location fallen.Detection method provided by the invention is based on Joint's falling off fault signature using Decision fusion technology, considers
Influence of the Joint's falling off failure to branch line circuit is that diagnosis refers to the ratio that current strength and firewire, zero curve generate magnetic field strength
Mark quickly, is accurately positioned Joint's falling off position, realizes electrothermal concrete road surface electrode plate Joint's falling off Nondestructive.
Although the present invention is disclosed above in the preferred embodiment, it is not intended to limit the invention the range of implementation.Any
The those of ordinary skill in field is not departing from invention scope of the invention, improves when can make a little, i.e., all according to this hair
Bright done same improvement, should be the scope of the present invention and is covered.
Claims (7)
1. a kind of detection method of the electrode plate Joint's falling off on electrothermal concrete road surface, which comprises the steps of:
S1: the current strength I of each power supply branch line in measurement electrothermal concrete road surfacei, according to each current strength IiIt calculates
To average current intensity Ia, and each current strength I is judged respectivelyiWhether the average current intensity I is less thana, with judgement
Whether each power supply branch line is suspected malfunctions route, in which: i >=1；
S2: each suspected malfunctions route is powered, and the root on the firewire, zero curve of each suspected malfunctions route respectively
Equidistant measuring point is taken according to pre-determined distance, measures that each firewire, the magnetic field of measuring point is strong on zero curve using electromagnetic field tester
Degree；
S3: pass through formulaCalculate the magnetic field strength ratio of firewire, the corresponding each measuring point of zero curve, in which: RiIt is i-th
The magnetic field strength ratio of a measuring point, mli、mniRespectively firewire, on zero curve i-th of measuring point magnetic field strength, i >=1；
S4: by each magnetic field strength than calculating magnetic field change rate of strength, and electrode is determined by the change rate of magnetic density
The position of plate Joint's falling off, specifically, passing through formulaThe change rate of magnetic density of each measuring point is calculated, is judged
The change rate of magnetic density biWhether between preset threshold range, with the determination suspected malfunctions route with the presence or absence of electricity
Pole plate Joint's falling off, and determine the specific location of electrode plate Joint's falling off, in which: biFor the change of magnetic field strength of i-th of measuring point
Rate, RiFor the magnetic field strength ratio of i-th of measuring point, d is measuring point spacing, i >=1.
2. detection method as described in claim 1, which is characterized in that the step S1 includes the following steps:
S11: using the current strength I of each power supply branch line in split-core type meter measurement electrothermal concrete road surfacei, in which: i >=1；
S12: according to each current strength Ii, average current intensity I is calculateda, in which: i >=1；
S13: each current strength I is judged respectivelyiWhether the average current intensity I is less thana, if so, the electric current is strong
Spending corresponding power supply branch line is suspected malfunctions route.
3. detection method as claimed in claim 2, which is characterized in that in step s 2, the pre-determined distance is the electrode
Plate connector spacing.
4. detection method as described in claim 1, which is characterized in that in the step S4, if the magnetic field of each measuring point
Change rate of strength biIt is between the preset threshold range, it is determined that electrodeless plate connector is de- in the suspected malfunctions route
It falls.
5. detection method as claimed in claim 4, which is characterized in that in the step S4, if the magnetic field strength of i-th of measuring point
Change rate biLess than preset threshold range lower limit, then i-th of measuring point and i-th on the firewire of the corresponding suspected malfunctions route of the measuring point
There are electrode plate Joint's falling offs between+1 measuring point.
6. detection method as claimed in claim 5, which is characterized in that in the step S4, if the magnetic field strength of i-th of measuring point
Change rate biGreater than the preset threshold range upper limit, then i-th of measuring point and i-th on the zero curve of the corresponding suspected malfunctions route of the measuring point
There are electrode plate Joint's falling offs between+1 measuring point.
7. detection method as claimed in claim 6, which is characterized in that the preset threshold range is (- 5,5).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710084116.1A CN106814277B (en) | 2017-02-16 | 2017-02-16 | A kind of detection method of the electrode plate Joint's falling off on electrothermal concrete road surface |
| JP2018020438A JP2018132522A (en) | 2017-02-16 | 2018-02-07 | Method for detecting dropout of electrode plate connector of electrothermal concrete road surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710084116.1A CN106814277B (en) | 2017-02-16 | 2017-02-16 | A kind of detection method of the electrode plate Joint's falling off on electrothermal concrete road surface |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106814277A CN106814277A (en) | 2017-06-09 |
| CN106814277B true CN106814277B (en) | 2019-06-18 |
Family
ID=59111068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710084116.1A Active CN106814277B (en) | 2017-02-16 | 2017-02-16 | A kind of detection method of the electrode plate Joint's falling off on electrothermal concrete road surface |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2018132522A (en) |
| CN (1) | CN106814277B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103245833A (en) * | 2012-02-10 | 2013-08-14 | 同济大学 | Conductive asphalt concrete resistivity measurement method based on two-electrode method |
| CN103675594A (en) * | 2013-12-07 | 2014-03-26 | 国家电网公司 | Fault detection instrument of power source circuit |
| CN104805754A (en) * | 2015-05-11 | 2015-07-29 | 东南大学 | Intelligent system for melting ice and snow on road and method |
| RU2563340C1 (en) * | 2014-07-10 | 2015-09-20 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "ВЯТСКИЙ ГОСУДАРСТВЕННЫЙ УНИВЕРСИТЕТ" (ФГБОУ ВПО "ВятГУ") | Method to detect area of single-phase ground fault in multi-terminal power transmission line with insulated neutral |
| CN106255248A (en) * | 2016-08-12 | 2016-12-21 | 四川华孚创科铁路设备有限公司 | A kind of railway holdfast heater |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016090451A (en) * | 2014-11-07 | 2016-05-23 | 株式会社村田製作所 | Electronic component irregular portion detection device and electronic component irregular portion detection method |
-
2017
- 2017-02-16 CN CN201710084116.1A patent/CN106814277B/en active Active
-
2018
- 2018-02-07 JP JP2018020438A patent/JP2018132522A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103245833A (en) * | 2012-02-10 | 2013-08-14 | 同济大学 | Conductive asphalt concrete resistivity measurement method based on two-electrode method |
| CN103675594A (en) * | 2013-12-07 | 2014-03-26 | 国家电网公司 | Fault detection instrument of power source circuit |
| RU2563340C1 (en) * | 2014-07-10 | 2015-09-20 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "ВЯТСКИЙ ГОСУДАРСТВЕННЫЙ УНИВЕРСИТЕТ" (ФГБОУ ВПО "ВятГУ") | Method to detect area of single-phase ground fault in multi-terminal power transmission line with insulated neutral |
| CN104805754A (en) * | 2015-05-11 | 2015-07-29 | 东南大学 | Intelligent system for melting ice and snow on road and method |
| CN106255248A (en) * | 2016-08-12 | 2016-12-21 | 四川华孚创科铁路设备有限公司 | A kind of railway holdfast heater |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2018132522A (en) | 2018-08-23 |
| CN106814277A (en) | 2017-06-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Chen et al. | Experiment research of dynamic stray current interference on buried gas pipeline from urban rail transit | |
| EP2757306A1 (en) | Method and equipment for identifying and measuring alternating current interference in buried ducts | |
| CN103944970B (en) | A kind of Orthotropic Steel Bridge Deck fatigue crack remote supervision system and method | |
| CN109797399A (en) | The measuring device and method of steel gas pipe underground polarization potential | |
| CN103063738A (en) | Detecting method of outer anti-corrosion layer of buried fuel gas steel pipeline | |
| CN106641741B (en) | A kind of device and method of the breaking point of the outer wall erosion resistant coating of the super buried depth pipeline of detection | |
| CN1234008C (en) | Comprehensively measuring method and device for electric potentials of pipe earth and ground surface for cathodic pipeline pretection | |
| CN102879323A (en) | Experiment system for corrosion of stray currents in subway | |
| CN106814277B (en) | A kind of detection method of the electrode plate Joint's falling off on electrothermal concrete road surface | |
| CN104807979B (en) | A kind of highway pavement Thaw performance evaluation methodology | |
| Vranešić et al. | Detrimental effect of stray current on rails and fastening systems in urban railway tracks | |
| CN105699858B (en) | A kind of aerial-cable hybrid line fault distance-finding method considering connection resistance | |
| Vranešić et al. | Dynamic stray current measuring methods in urban areas | |
| Vranešić et al. | Corrosion and stray currents at urban track infrastructure | |
| CN104807980B (en) | A kind of evaluation method of highway pavement Thaw performance | |
| CN108663408A (en) | A kind of steel oil-gas pipeline Directional Drilling erosion resistant coating breakage rate determines method | |
| Li et al. | Pavement surface microtexture: Testing, characterization, and frictional interpretation | |
| Memon et al. | Stray current corrosion mitigation, testing and maintenance in DC transit system | |
| RU2781137C1 (en) | Method for determining the integrity of pipeline protective casings at intersections with roads and railways | |
| CN107544006A (en) | Experimental method for electric transmission line isolator type selecting under the big temperature difference of high wind sand and dust | |
| CN207541167U (en) | A kind of detecting system of buried steel pipe exchange drain means | |
| CN110346547A (en) | A kind of road surface real-time humidity sensor monitoring equipment | |
| CN107144772B (en) | A kind of subway closed guard gate and rail are insulated method for testing performance | |
| Baxter et al. | Vertical electrical impedance evaluation of asphalt overlays on concrete bridge decks | |
| Cenek et al. | New Zealand experience in comparing manual and automatic pavement condition rating systems |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |