CN110333539A - A kind of power distribution network shaft tower chassis, chuck and pulling plate nondestructive detection system and method - Google Patents
A kind of power distribution network shaft tower chassis, chuck and pulling plate nondestructive detection system and method Download PDFInfo
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- CN110333539A CN110333539A CN201910648445.3A CN201910648445A CN110333539A CN 110333539 A CN110333539 A CN 110333539A CN 201910648445 A CN201910648445 A CN 201910648445A CN 110333539 A CN110333539 A CN 110333539A
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- 238000001514 detection method Methods 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title abstract description 18
- 230000006698 induction Effects 0.000 claims abstract description 11
- 230000009471 action Effects 0.000 claims abstract description 5
- 239000003990 capacitor Substances 0.000 claims description 11
- 230000005672 electromagnetic field Effects 0.000 claims description 9
- 230000005674 electromagnetic induction Effects 0.000 claims description 5
- 230000005284 excitation Effects 0.000 claims description 4
- 238000010276 construction Methods 0.000 abstract description 13
- 230000000694 effects Effects 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 6
- 238000012360 testing method Methods 0.000 abstract description 2
- 230000001808 coupling effect Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 238000009659 non-destructive testing Methods 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- 238000009413 insulation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000541 pulsatile effect Effects 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
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- 238000012795 verification Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
- G01V3/10—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils
Abstract
The invention discloses the nondestructive detection systems and method of a kind of power distribution network shaft tower chassis, chuck and pulling plate, belong to underground metalliferous field of detecting；It include: transmitting coil, receiving coil, transmitting module, receiving module, signal acquisition module and embedded module；Apply pulse current source on transmitting coil, obtains primary space induction field；Receiving coil generates induced electromotive force under the action of primary space induction field；Binding signal acquisition module and embedded module compare the feedback waveform of the waveform of induced electromotive force and standard component, obtain the buried situation on power distribution network shaft tower chassis, chuck and pulling plate；The present invention is compared with tradition excavates detection, and detection process is not necessarily to secondary construction, and detection cycle is shorter, improves detection efficiency, while there is no the risks for influencing original construction effect, testing cost is lower and detection safety is higher.
Description
Technical field
The invention belongs to underground metalliferous field of detecting, more particularly, to a kind of power distribution network shaft tower chassis, chuck and pulling plate
Nondestructive detection system and method.
Background technique
Overhead distributionnetwork route has harsh requirement to grounded screen construction quality as urban infrastructure.Electric power transmission
The main construction content of line project is embedded power distribution network underground shaft tower, in order to efficiently examine shaft tower in the bottom of underground, drawing, chuck
Whether equal components are buried as requested, detection efficiency are improved using the technology of no-dig technique, to realization power distribution network shaft tower bottom, drawing, card
The construction quality inspection of disk is of great significance.
Excavating detection is the traditional detection method for power distribution network shaft tower chassis, pulling plate and chuck buried depth, by power distribution network bar
The soil that tower buries region excavates, and exposes shaft tower bottom, drawing, chuck structure, and by method measured directly, obtain
Bottom, drawing, chuck buried depth.
Since power distribution network shaft tower chassis, pulling plate and chuck have certain depth of burying, excavates detection and need to utilize excavator
Equal heavy-duty machineries, testing cost is high, and detection cycle is long.In addition, due to the quickening of urbanization speed, power distribution network shaft tower chassis,
The layout of pulling plate and chuck in underground is intricate, and secondary detection process may bring inbuilt shaft tower bottom, drawing, chuck
Damage, influences original construction effect.
Summary of the invention
In view of the drawbacks of the prior art, the purpose of the present invention is to provide a kind of power distribution network shaft tower chassis, chuck and pulling plates
Nondestructive detection system and method, it is intended to solve to the non-destructive testing of power distribution network shaft tower chassis, chuck and pulling plate using traditional
Excavate the problem that detection causes detection efficiency lower.
To achieve the above object, the present invention provides the non-destructive testing systems of a kind of power distribution network shaft tower chassis, chuck and pulling plate
System, comprising: transmitting coil, receiving coil, transmitting module, receiving module, signal acquisition module and embedded module；
The input terminal of signal acquisition module is parallel to two input terminals of receiving coil；Its output end connects embedded module
Input terminal；
Transmitting module is connected with transmitting coil；Receiving module is connected with receiving coil；
Transmitting coil is for generating primary space electromagnetic field；Transmitting module is used to provide pulse current source for transmitting coil；
Receiving coil is used to received primary space electromagnetic field being based on electromagnetic induction principle to generate induced electromotive force；It receives
Module is used to form current path with receiving coil；
Signal acquisition module is used to acquire the induced electromotive force of receiving coil generation；Embedded module is used for induction electric
The waveform of gesture and the feedback comparison of wave shape of standard component obtain the buried depth situation on power distribution network shaft tower chassis, chuck and pulling plate.
Preferably, induced electromotive force are as follows:
Wherein, v1(t) ' be receiving coil both ends induced electromotive force；i1' (t) be transmitting coil cut-off current；M12'
Equivalent mutual inductance when for detection bar tower chassis, pulling plate and chuck structure, between transmitting coil and receiving coil；
Preferably, transmitting module includes: battery, the insulated gate bipolar transistor of first band anti-paralleled diode, capacitor
Device and first resistor device；
Battery is connected with the insulated gate bipolar transistor of first band anti-paralleled diode, and first resistor device and capacitor are simultaneously
It connects after connection with battery；
The insulated gate bipolar transistor series connection of first band anti-paralleled diode is for controlling the time for applying excitation；First electricity
Resistance device and capacitor are used to provide freewheeling path after the insulated gate bipolar transistor shutdown of first band anti-paralleled diode.
Preferably, receiving module include: the second insulated gate bipolar transistor with anti-paralleled diode, second resistor with
And third diode；
The both ends of receiving coil are connected in parallel on after second resistor and third Diode series, and with second with two pole of inverse parallel
The insulated gate bipolar transistor of pipe is connected；
What the second insulated gate bipolar transistor with anti-paralleled diode was used to control and receive module turns on and off state；
The series loop of second resistor and third diode is used for the voltage at clamper receiving coil both ends.
Preferably, embedded module comparison induced electromotive force waveform and standard component feedback waveform amplitude or slope or
The combination of amplitude and slope；
Preferably, transmitting coil and receiving coil are multiturn multilayered structure；
Preferably, the feedback type of waveform of standard component includes: the feedback waveform on only chassis, the only feedback wave of pulling plate
Shape, only the feedback waveform of chuck, the feedback waveform comprising chassis, pulling plate and chuck at least two.
On the other hand, the present invention provides a kind of power distribution network shaft tower chassis, the lossless detection method of pulling plate and chuck, packets
It includes:
(1) apply pulse current source on transmitting coil, obtain primary space induction field；
(2) receiving coil generates induced electromotive force under the action of primary space induction field；
(3) the feedback waveform of the waveform of induced electromotive force and standard component is compared, obtains power distribution network shaft tower chassis, chuck
With the buried situation of pulling plate；
Preferably, induced electromotive force are as follows:
Wherein, v1(t) ' be receiving coil both ends induced electromotive force；i1' (t) be transmitting coil cut-off current；M12'
Equivalent mutual inductance when for detection bar tower chassis, pulling plate and chuck structure, between transmitting coil and receiving coil；
Preferably, the feedback type of waveform of standard component includes the feedback waveform on only chassis, only the feedback waveform of pulling plate,
The only feedback waveform of chuck, the feedback waveform comprising chassis, pulling plate and chuck at least two.
Contemplated above technical scheme through the invention can obtain following compared with prior art
The utility model has the advantages that
1, the present invention in transmitting coil by being passed through pulse current source, due to mutual between transmitting coil and receiving coil
Sense acts on, and generates an electromagnetic field around transmitting coil and generates an induced electromotive force, power distribution network shaft tower on receiving coil
Bottom, drawing, the presence of chuck can change the magnetic circuit between transmitting coil and receiving coil, influence between transmitting coil and receiving coil
Electromagnetic coupling effect so that acquisition signal on receiving coil becomes variation.Since this electromotive force difference derives from power distribution network bar
Tower bottom, drawing, the distribution of chuck include its distribution information, therefore the induced electromotive force wave by will acquire on receiving coil
Shape v1(t) ' with the induced electromotive force waveform v of standard component1(t) " compare, can be obtained power distribution network shaft tower bottom, drawing, chuck it is embedded
Situation, the present invention is compared with tradition excavates detection, and detection process is not necessarily to secondary construction, and detection cycle is shorter, improves detection effect
Rate.
2, the nondestructive detection system and method for power distribution network shaft tower provided by the invention chassis, chuck and pulling plate are in detection process
In without using heavy-duty machineries such as excavators, soil-geological will not be destroyed, also there is no the risk for influencing original construction effect, inspections
Survey cost is lower and detection safety is higher.
Detailed description of the invention
Fig. 1 is the non-destructive testing on power distribution network the shaft tower chassis, pulling plate and chuck provided by the invention based on transient electromagnetic method
System schematic；
Fig. 2 is the placement figure of transmitting coil and receiving coil provided by the invention；
Fig. 3 is the top view of transmitting coil and receiving coil provided by the invention；
Fig. 4 is the sectional view of transmitting coil and receiving coil provided by the invention；
Fig. 5 is the internal structure chart of transmitting module provided by the invention；
Fig. 6 is the internal structure chart of receiving module provided by the invention；
Label declaration:
1- transmitting coil；2- receiving coil；3- transmitting module；4- receiving module；5- signal acquisition module；The embedded mould of 6-
Block；7- shaft tower chassis；8- pulling plate；9- chuck；The buried depth on 10- shaft tower chassis；The buried depth of 11- pulling plate；The buried depth of 12- chuck；13-
Soil horizon；14- power distribution network shaft tower；The end of incoming cables of 15- transmitting coil；The leading-out terminal of 16- transmitting coil；17- receiving coil into
Line end；The leading-out terminal of 18- receiving coil；A 19- signal acquisition module lead end in parallel with receiving coil；20- signal is adopted
Collect a module lead end in parallel with receiving coil；The vertical range of 21- transmitting coil and receiving coil；22- transmitting coil
With the lateral distance of receiving coil；The internal diameter of 23- transmitting coil；The internal diameter of 24- receiving coil；The outer diameter of 25- transmitting coil；
The outer diameter of 26- receiving coil；The electric current of 27- transmitting coil flows into direction；The electric current of 28- transmitting coil flows out direction；29- is received
The electric current of coil flows into direction；The electric current of 30- receiving coil flows out direction；31- battery；32- first band anti-paralleled diode
Insulated gate bipolar transistor；33- capacitor；34- first resistor device；35- first diode；The second diode of 36-；37-
Two insulated gate bipolar transistors with anti-paralleled diode；38- second resistor；39- third diode.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
As shown in Figure 1, the present invention provides a kind of power distribution network shaft tower chassis, the nondestructive detection system of chuck and pulling plate, packet
It includes: transmitting coil 1, receiving coil 2, transmitting module 3, receiving module 4, signal acquisition module 5 and embedded module 6；
The input terminal of signal acquisition module 5 is parallel to two input terminals of receiving coil 2；Its output end connects embedded mould
The input terminal of block 6；
Transmitting module 3 is connected with transmitting coil 1；Receiving module 4 is connected with receiving coil 2；
Transmitting coil 1 is for generating primary space electromagnetic field；Transmitting module 3 is used to provide pulse current for transmitting coil 1
Source；
Receiving coil 2 is used to received primary space electromagnetic field being based on electromagnetic induction principle to generate induced electromotive force；It connects
Module 4 is received to be used to form current path with receiving coil 2；
Signal acquisition module 5 is used to acquire the induced electromotive force of the generation of receiving coil 2；Embedded module 6 will be for that will incude
The waveform of electromotive force and the feedback comparison of wave shape of standard component obtain the buried depth feelings on power distribution network shaft tower chassis 7, chuck 9 and pulling plate 8
Condition.
Label 10,11,12 respectively indicates the buried depth of shaft tower chassis, pulling plate and chuck in Fig. 1；13 and 14 respectively indicate soil
Earth layer and power distribution network shaft tower；15 and 16 respectively indicate the end of incoming cables of transmitting coil 1 and leading-out terminal；19 and 20 be signal acquisition module
5 two lead ends in parallel with receiving coil；
Induced electromotive force are as follows:
Wherein, v1(t) ' be receiving coil both ends induced electromotive force；i1' (t) be transmitting coil cut-off current；M12'
Equivalent mutual inductance when for detection bar tower chassis, pulling plate and chuck structure, between transmitting coil and receiving coil；
Fig. 2 is transmitting coil 1 and 2 relative position of receiving coil and brief configuration figure in kind.Label 15 and 16 distinguishes table
Show end of incoming cables and the leading-out terminal of transmitting coil 1；17 and 18 respectively indicate the end of incoming cables of receiving coil 2 and leading-out terminal；21 and 22 points
Not Biao Shi transmitting coil 1 and receiving coil 2 vertical range and lateral distance.By adjusting transmitting coil 1 and receiving coil 2
Position changes the vertical range 21 and lateral distance 22 of two coils, and the mutual inductance between two coils is adjusted；
Fig. 3 is the top view of transmitting coil 1 and receiving coil 2, and 23 and 24 be respectively transmitting coil 1 and receiving coil 2
Internal diameter, 25 and 26 be respectively the outer diameter of transmitting coil 1 and receiving coil 2；This four parameters determine transmitting coil 1 and receiving coil
2 size and laterally opposed position；
Fig. 4 is the sectional view citing of transmitting coil 1 and receiving coil 2, and transmitting coil 1 and receiving coil 2 may be designed to more
The structure of circle multilayer, the number of plies, the number of turns and current flowing direction have an impact to detection effect, and label 27 and 28 respectively indicates
Electric current in transmitting coil 1 flows into direction, electric current outflow direction；Label 29 and 30 respectively indicates the electric current stream in receiving coil 2
Direction is flowed out into direction and electric current；
Fig. 5 is the schematic diagram of transmitting module, and transmitting module includes: the insulation of battery 31, first band anti-paralleled diode
Grid bipolar transistor 32, capacitor 33, first resistor device 34, first diode 35 and the second diode 36,
Battery 31 is connected with the insulated gate bipolar transistor 32 of first band anti-paralleled diode, first resistor device 34 and electricity
It connects after 33 parallel connection of container with battery 31；
The series connection of insulated gate bipolar transistor 32 of first band anti-paralleled diode is for controlling the time for applying excitation；First
Resistor 34 and capacitor 33 are used to provide afterflow after the insulated gate bipolar transistor 32 of first band anti-paralleled diode turns off
Access；
Battery 31 to receiving coil 2 provide energy, detection system start to work when, first band anti-paralleled diode it is exhausted
Edge grid bipolar transistor 32 and the second diode 36 are open-minded, and transmitting coil 1 and battery 31 form access, 1 electric current of transmitting coil
Start from scratch increase, to maximum value after maintain a Duan Pingding；The insulated gate bipolar transistor 32 of first band anti-paralleled diode closes
It has no progeny, transmitting coil 1 and first resistor device 34, first diode 35 form continuous current circuit, to 33 reverse charging of capacitor, due to
The capacitance of capacitor 33 is smaller, and the rapid resonance of 1 electric current of transmitting coil is turned off to zero, second diode 36, transmitting coil electric current
It is constant to be maintained zero, until the insulated gate bipolar transistor 32 of first band anti-paralleled diode is connected next time, repeats above-mentioned mistake
Journey；
Fig. 6 is the schematic diagram of receiving module, and receiving module includes: the second insulated gate bipolar transistor with anti-paralleled diode
Pipe 37, second resistor 38 and third diode 39；
Second resistor 39 and third diode 39 are connected in parallel on the both ends of receiving coil 2 after connecting, and anti-simultaneously with the second band
The insulated gate bipolar transistor 37 of union II pole pipe is connected；
What the second insulated gate bipolar transistor 37 with anti-paralleled diode was used to control and receive module 4 turns on and off shape
State；The series loop of second resistor 38 and third diode 39 is used for the voltage at 2 both ends of clamper receiving coil；
When receiving coil 2 works, the second insulated gate bipolar transistor 37 with anti-paralleled diode is open-minded, power distribution network bar
Voltage of the induced magnetic field caused by tower bottom metal parts at 2 both ends of receiving coil passes through end of incoming cables 17 and leading-out terminal 18 and letter
The end of incoming cables 19 of number acquisition module 5 is connected with leading-out terminal 20, and induced electromotive force is entered and left signal acquisition module 5 and embedded mould
Block 6 is analyzed, by obtaining power distribution network shaft tower compared with by the induction field waveform of the inbuilt standard component feedback of construction requirement
The distributed intelligence on chassis, chuck and pulling plate.
Preferably, embedded module comparison induced electromotive force waveform and standard component feedback waveform amplitude or slope or
The combination of amplitude and slope；
The feedback type of waveform of standard component includes the feedback waveform on only chassis, only the feedback waveform of pulling plate, is only blocked
The feedback waveform of disk, the feedback waveform comprising chassis, pulling plate and chuck at least two.
On the other hand, the present invention provides a kind of power distribution network shaft tower chassis, the lossless detection method of pulling plate and chuck, packets
It includes:
(1) apply pulse current source on transmitting coil, obtain primary space induction field；
(2) receiving coil generates induced electromotive force under the action of primary space induction field；
(3) the feedback waveform of the waveform of induced electromotive force and standard component is compared, obtains power distribution network shaft tower chassis, chuck
With the buried situation of pulling plate；
Preferably, induced electromotive force are as follows:
Wherein, v1(t) ' be receiving coil both ends induced electromotive force；i1' (t) be transmitting coil cut-off current；M12'
Equivalent mutual inductance when for detection bar tower chassis, pulling plate and chuck structure, between transmitting coil and receiving coil；
Preferably, the feedback type of waveform of standard component includes the feedback waveform on only chassis, only the feedback waveform of pulling plate,
The only feedback waveform of chuck, the feedback waveform comprising chassis, pulling plate and chuck at least two；
During atual detection, apply pulse current source to transmitting coil 1, due to transmitting coil 1 and receiving coil 2 it
Between there are mutual inductance, an induced electromotive force v can be generated on receiving coil 21(t), according to electromagnetic induction principle, when pulse current closes
Disconnected moment, 1 surrounding of transmitting coil can generate pulsatile once magnetic field, and spread to surrounding space；
When underground is there are when shaft tower chassis 7, pulling plate 8 and chuck 9, under the action of an electromagnetic field, shaft tower chassis, pulling plate
And it will affect the magnetic circuit between transmitting coil 1 and receiving coil 2, transmitting coil in the reinforcing bar (or other metal components) in chuck
Mutual inductance between 1 and receiving coil 2 will become M12', the actual acquisition electromotive force on receiving coil 1 is v1(t) ', it is wanted by construction
The induced electromotive force waveform for seeking inbuilt standard component feedback is v1(t) " it, according to the law of electromagnetic induction, can obtain:
Wherein, di1' (t) be transmitting coil 1 on cut-off current, v1(t) ' it is by power distribution network shaft tower during actual measurement
Chassis, pulling plate and chuck participate in constituting magnetic circuit, what the electromagnetic coupling effect between receiving coil 2 and transmitting coil 1 that influences generated；
When power distribution network chassis, pulling plate and the chuck of various models are constructed according to standard, by applying electricity to transmitting coil 1
Stream excitation, the voltage at 2 both ends of receiving coil pass through the lead end 19 and 20 of end of incoming cables 17 and leading-out terminal 18 and signal acquisition module 5
It is connected, collected different model is matched to the feedback waveform v of the quasi- part of subscripting1(t) " input signal acquisition module 5 and insertion
Formula module 6 is analyzed.By by actual acquisition signal v1(t) ' and standard component feedback waveform v1(t) " it compares, bar can be obtained
The relevant information of tower component to be detected.Such as: first by v1(t) ' with there is no power distribution network shaft tower chassis, pulling plate and when chuck
Standard feedback waveform v1(t) it compares, passes through the waveform parameters diversity judgement such as amplitude, slope shaft tower chassis, pulling plate and card to be detected
The combining form of disk is (only in one of shaft tower chassis 7, pulling plate 8, chuck 9 or shaft tower chassis 7, pulling plate 8 and chuck 9 extremely
It is two kinds few)；Then by v1(t) ' in standard construction data-base under the combining form standard component feedback waveform v1(t) " it carries out pair
Than judging the information such as the buried depth of each component, extent of corrosion by the waveform parameters characteristic such as waveforms amplitude, slope.To sum up, of the invention
The lossless detection method on the power distribution network shaft tower chassis of offer, pulling plate and chuck can be under conditions of no-dig technique, and efficiently verification is matched
Whether power grid shaft tower sets as requested is buried.
To sum up, the present invention in transmitting coil by being passed through pulse current source, due between transmitting coil and receiving coil
Mutual inductance effect, generate an electromagnetic field around transmitting coil and generate an induced electromotive force, power distribution network on receiving coil
Shaft tower bottom, drawing, the presence of chuck can change the magnetic circuit between transmitting coil and receiving coil, influence transmitting coil and receiving coil
Between electromagnetic coupling effect so that acquisition signal on receiving coil becomes variation.Since this electromotive force difference derives from distribution
Net shaft tower bottom, drawing, the distribution of chuck include its distribution information, therefore the induction electric by will acquire on receiving coil
Gesture waveform v1(t) ' with the induced electromotive force waveform v of standard component1(t) " it compares, power distribution network shaft tower bottom, drawing, chuck can be obtained
Embedded situation, the present invention is compared with tradition excavates detection, and detection process is not necessarily to secondary construction, and detection cycle is shorter, improves inspection
Survey efficiency.
The nondestructive detection system and method on power distribution network shaft tower provided by the invention chassis, chuck and pulling plate are in the detection process
Without using heavy-duty machineries such as excavators, soil-geological will not be destroyed, also there is no the risk for influencing original construction effect, detections
Cost is lower and detection safety is higher.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should all include
Within protection scope of the present invention.
Claims (9)
1. the nondestructive detection system on a kind of power distribution network shaft tower chassis, chuck and pulling plate characterized by comprising transmitting coil connects
Take-up circle, transmitting module, receiving module, signal acquisition module and embedded module；
The input terminal of signal acquisition module is parallel to two input terminals of receiving coil；Its output end connects the defeated of embedded module
Enter end；
Transmitting module is connect with transmitting coil；Receiving module is connect with receiving coil；
Transmitting coil is for generating primary space electromagnetic field；Transmitting module is used to provide pulse current source for transmitting coil；
Receiving coil is used to received primary space electromagnetic field being based on electromagnetic induction principle to generate induced electromotive force；Receiving module
For forming current path with receiving coil；
Signal acquisition module is used to acquire the induced electromotive force of receiving coil generation；Embedded module is used for induced electromotive force
The feedback comparison of wave shape of waveform and standard component obtains the buried depth situation on power distribution network shaft tower chassis, chuck and pulling plate.
2. nondestructive detection system according to claim 1, which is characterized in that the induced electromotive force are as follows:
Wherein, v1(t) ' be receiving coil both ends induced electromotive force；i1' (t) be transmitting coil cut-off current；M12' it is detection
Equivalent mutual inductance when shaft tower chassis, pulling plate and chuck structure, between transmitting coil and receiving coil.
3. nondestructive detection system according to claim 1, which is characterized in that the transmitting module includes: battery, first
Insulated gate bipolar transistor, capacitor and first resistor device with anti-paralleled diode；
Battery is connected with the insulated gate bipolar transistor of first band anti-paralleled diode, after first resistor device is in parallel with capacitor
It connects with battery；
The insulated gate bipolar transistor series connection of first band anti-paralleled diode is for controlling the time for applying excitation；First resistor device
It is used to provide freewheeling path after the insulated gate bipolar transistor shutdown of first band anti-paralleled diode with capacitor.
4. nondestructive detection system according to claim 1 or 3, which is characterized in that the receiving module includes:
Second insulated gate bipolar transistor with anti-paralleled diode, second resistor and third diode；
The both ends of receiving coil are connected in parallel on after second resistor and third Diode series, and with second with anti-paralleled diode
Insulated gate bipolar transistor series connection；
What the second insulated gate bipolar transistor with anti-paralleled diode was used to control and receive module turns on and off state；Second
The series loop of resistor and third diode is used for the voltage at clamper receiving coil both ends.
5. nondestructive detection system according to claim 3 or 4, which is characterized in that the transmitting coil and receiving coil are equal
For multiturn multilayered structure.
6. nondestructive detection system according to claim 1, which is characterized in that the feedback type of waveform packet of the standard component
It includes: the only feedback waveform on chassis, only the feedback waveform of pulling plate, only the feedback waveform of chuck, comprising chassis and pulling plate
Waveform, the feedback waveform comprising chassis and chuck are fed back, the feedback waveform comprising pulling plate and chuck includes chassis, pulling plate and card
The feedback waveform of disk.
7. the detection method of the nondestructive detection system based on power distribution network shaft tower described in claim 1 chassis, chuck and pulling plate, packet
It includes:
(1) apply pulse current source on transmitting coil, obtain primary space induction field；
(2) receiving coil generates induced electromotive force under the action of primary space induction field；
(3) the feedback waveform of the waveform of induced electromotive force and standard component is compared, obtains power distribution network shaft tower chassis, chuck and drawing
The buried situation of disk.
8. detection method according to claim 7, which is characterized in that the induced electromotive force are as follows:
Wherein, v1(t) ' be receiving coil both ends induced electromotive force；i1' (t) be transmitting coil cut-off current；M12' it is detection
Equivalent mutual inductance when shaft tower chassis, pulling plate and chuck structure, between transmitting coil and receiving coil.
9. detection method according to claim 7 or 8, which is characterized in that the feedback type of waveform of the standard component includes:
The only feedback waveform on chassis, only the feedback waveform of pulling plate, only the feedback waveform of chuck, the feedback comprising chassis and pulling plate
Waveform, the feedback waveform comprising chassis and chuck, the feedback waveform comprising pulling plate and chuck include chassis, pulling plate and chuck
Feed back waveform.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910648445.3A CN110333539A (en) | 2019-07-18 | 2019-07-18 | A kind of power distribution network shaft tower chassis, chuck and pulling plate nondestructive detection system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910648445.3A CN110333539A (en) | 2019-07-18 | 2019-07-18 | A kind of power distribution network shaft tower chassis, chuck and pulling plate nondestructive detection system and method |
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| CN110333539A true CN110333539A (en) | 2019-10-15 |
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| CN201910648445.3A Pending CN110333539A (en) | 2019-07-18 | 2019-07-18 | A kind of power distribution network shaft tower chassis, chuck and pulling plate nondestructive detection system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114295871A (en) * | 2021-12-30 | 2022-04-08 | 国网湖南省电力有限公司 | Non-excavation detection method and system for grounding grid of transmission high-voltage line tower |
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| GB2089992A (en) * | 1980-12-23 | 1982-06-30 | White S Electronics | Target Depth Reading Metal Detector |
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