CN110346839A - A kind of power distribution network shaft tower chassis, pulling plate and chuck detection system and method - Google Patents
A kind of power distribution network shaft tower chassis, pulling plate and chuck detection system and method Download PDFInfo
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- CN110346839A CN110346839A CN201910697748.4A CN201910697748A CN110346839A CN 110346839 A CN110346839 A CN 110346839A CN 201910697748 A CN201910697748 A CN 201910697748A CN 110346839 A CN110346839 A CN 110346839A
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- 238000001514 detection method Methods 0.000 title claims abstract description 82
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- 230000005284 excitation Effects 0.000 claims abstract description 11
- 230000005672 electromagnetic field Effects 0.000 claims abstract description 10
- 230000005611 electricity Effects 0.000 claims description 14
- 238000005260 corrosion Methods 0.000 claims description 12
- 230000007797 corrosion Effects 0.000 claims description 12
- 230000009471 action Effects 0.000 claims description 5
- 238000007689 inspection Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 2
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- 239000003990 capacitor Substances 0.000 description 9
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- 230000001939 inductive effect Effects 0.000 description 4
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- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000013016 damping Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
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- 239000002689 soil Substances 0.000 description 3
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- 238000009659 non-destructive testing Methods 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
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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
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Abstract
The invention discloses the detection systems and method of a kind of power distribution network shaft tower chassis, pulling plate and chuck, belong to underground metalliferous field of detecting, comprising: transmit circuit, receives circuit, signal conditioning circuit, embeded processor, pulling plate lead, chassis lead and chuck lead at receiving coil；Transmit circuit is used to provide pulse excitation current source for chassis or pulling plate or chuck；Receiving coil is used to generate induced electromotive force by external electromagnetic field；Circuit is received to be used to form closed-loop path with receiving coil；Signal demodulating circuit is used to acquire the induced electromotive force of receiving coil generation；Embeded processor is used for the feedback waveform by comparison induced electromotive force waveform and standard component, obtains the buried depth depth on power distribution network shaft tower chassis, pulling plate and chuck.The invention avoids induction field is generated between traditional transmitting coil and receiving coil, the case where generating an induced electromotive force on receiving coil, detection error is greatly reduced.
Description
Technical field
The invention belongs to underground metalliferous field of detecting, more particularly, to a kind of power distribution network shaft tower chassis, pulling plate and chuck
Detection system and method.
Background technique
Power distribution network shaft tower chassis, the construction of pulling plate and chuck and maintenance play an important role to the firm of shaft tower, but by
It is easy to influence its mechanicalness by soil corrosion in burying the bar construction in ground end, shaft tower chassis, pulling plate and chuck throughout the year
Energy.Therefore, it is efficiently verification power distribution network shaft tower chassis, the construction quality of pulling plate and chuck, no-dig technique is taken to power distribution network shaft tower
Lossless detection be of great significance.
The components such as power distribution network shaft tower chassis, pulling plate and chuck are usually poured by steel mesh and mixed mud, contain metal
Ingredient, therefore, under conventional electrical distribution entoilage in shaft tower detection process, Chang Liyong transmitting coil and receiving coil carry out lossless inspection
It surveys.Pulse current source is passed through in transmitting coil, due to the coupling between transmitting coil and receiving coil, transmitting coil week
An electromagnetic field can be generated and generate an induced electromotive force on receiving coil by enclosing.Simultaneously shaft tower chassis, pulling plate and chuck
It is underground reinforced that inductive loop can be generated under an electromagnetic action, and secondary induced electromotive force is generated on receiving coil.Due to
Secondary induced electromotive force is related with the distribution of underground reinforced net in shaft tower chassis, pulling plate and chuck, therefore, receives line by analysis
Collected secondary induced electromotive force waveform can be detected whether power distribution network shaft tower chassis, pulling plate and chuck bury as requested on circle
If.
But in practical applications, the above method has the following problems: (1) the acquisition signal at receiving coil both ends not only has
Secondary induction voltage goes back the primary induction voltage that mutual inductance effect generates between aliasing transmitting coil and receiving coil, and for the first time
Induced voltage amplitude is typically larger than secondary induction voltage, interferes the acquisition signal at receiving coil both ends, causes detecting error larger；
(2) since the metal bracing wire of power distribution network shaft tower and internal bar construction are closer apart from earth's surface, between transmitting coil, receiving coil
Coupling become apparent from, the influence to secondary induced electromotive force account for it is leading, cause from secondary induction field waveform by chassis,
The difficulty that pulling plate and chuck distributed intelligence distinguish is larger；(3) secondary induced electromotive force waveform is difficult to reflect power distribution network shaft tower
The important informations such as chassis, the rebar sizes of pulling plate and chuck, extent of corrosion.Therefore, the precision for improving non-destructive testing, matches realization
Power grid shaft tower chassis, pulling plate and chuck, which efficiently verify, to be of great significance.
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, pulling plate and chucks
Detection system and method, it is intended to solve it is existing using receiving coil and transmitting coil detection power distribution network shaft tower chassis, pulling plate and
When chuck buried depth, there is only the secondary induced electromotive force of chassis, pulling plate and chuck induction, there is also emission lines on receiving coil
The problem that induced electromotive force of circle induction causes detection error larger.
To achieve the above object, the present invention provides a kind of power distribution network shaft tower chassis, the detection system of pulling plate and chuck, packets
Include: transmit circuit, receives circuit, signal conditioning circuit, embeded processor, pulling plate lead, chassis lead and card at receiving coil
Disk lead；
Transmit circuit is connect by chassis lead with chassis, or is connect by pulling plate lead with pulling plate, or drawn by chuck
Line is connect with chuck；The output end of receiving coil is connect with the input terminal for receiving circuit；The input terminal of signal conditioning circuit with connect
Receive the output end connection of circuit；The output end of signal conditioning circuit and an input terminal of embeded processor connect；
Transmit circuit is used to provide pulse excitation current source for chassis or pulling plate or chuck；
Receiving coil is used to generate induced electromotive force by external electromagnetic field；
Circuit is received to be used to form closed-loop path with receiving coil；
Signal demodulating circuit is used to acquire the induced electromotive force of receiving coil generation；
Embeded processor is used for the feedback waveform by comparison induced electromotive force waveform and standard component, obtains power distribution network bar
The buried depth depth of tower chassis, pulling plate and chuck.
Preferably, a kind of power distribution network shaft tower chassis, pulling plate and chuck detection system further include: detection circuit；
The input terminal of detection circuit is connect by chassis lead with chassis, or is connect by pulling plate lead with pulling plate, or logical
Chuck lead is crossed to connect with chuck；
The output end of detection circuit and another input terminal of embeded processor connect；
Detection circuit is for obtaining the voltage difference between the lead port of chassis and the electric current in the lead of chassis or pulling plate lead
The electricity in voltage difference and chuck lead between voltage difference between port and the electric current in pulling plate lead or chuck lead port
Stream；
Embeded processor is also used to obtain by the inductance and resistance value that calculate power distribution network shaft tower chassis, pulling plate and chuck
Take the extent of corrosion on power distribution network shaft tower chassis, pulling plate and chuck；
Preferably, the relationship between the inductance and resistance value of power distribution network shaft tower chassis, pulling plate and chuck are as follows:
Wherein, Vm(t) voltage difference between chassis or pulling plate or chuck lead port；i2It (t) is chassis lead or pulling plate
Electric current in lead or chuck lead；L is the inductance of power distribution network shaft tower chassis or pulling plate or chuck；R is power distribution network shaft tower chassis
Or the resistance of pulling plate or chuck；Voltage difference between the lead port of chassis, the electric current in the lead of chassis, the inductance on chassis and chassis
Resistance it is corresponding；Voltage difference between pulling plate lead port, the electric current in pulling plate lead, the inductance of pulling plate and pulling plate resistance pair
It answers；The resistance correspondence of voltage difference between chuck lead port, the electric current in chuck lead, the inductance of chuck and chuck；
Preferably, induced electromotive force are as follows:
Wherein, V1(t) ' be receiving coil both ends induced electromotive force；i1' (t) be chassis lead or pulling plate lead or chuck
The cut-off current of lead；M1Equivalent mutual inductance between detection bar tower chassis or pulling plate or chuck and receiving coil.
Preferably, detection circuit includes: the first battery, voltmeter, Hall element and first resistor device；Under working condition
First battery, Hall element, first resistor device are connected with power distribution network shaft tower chassis or pulling plate or chuck；Voltmeter and chassis or
Pulling plate or chuck lead port are in parallel；First battery provides power supply；First resistor device is used to adjust the damping system of detection circuit
Number；Voltmeter measures the voltage difference between chassis or pulling plate or chuck lead port；Hall element measures chassis or pulling plate or card
Electric current in disk lead.
Preferably, transmit circuit includes: the second battery, the insulated gate bipolar transistor with anti-paralleled diode, capacitor
Device, second resistor and diode；Second battery is connected with the insulated gate bipolar transistor with anti-paralleled diode；Second electricity
It is in parallel with capacitor with after Diode series to hinder device；
Second battery is for providing power supply energy；Insulated gate bipolar transistor with anti-paralleled diode is applied for controlling
Add the time of pulse excitation；Capacitor, second resistor and diode are used for brilliant in the insulated gate bipolar with anti-paralleled diode
Freewheeling path is provided after the shutdown of body pipe；
Preferably, receiving circuit includes potentiometer, and potentiometer is connected with receiving coil, for adjusting the damping for receiving circuit
Coefficient reduces induced electromotive force oscillating waveform；
Preferably, the detection method of the nondestructive detection system of power distribution network shaft tower chassis, chuck and pulling plate, comprising:
(1) apply pulse current on chassis or pulling plate or chuck, obtain space induction field；
(2) receiving coil generates induced electromotive force under the action of the induction field of space；
(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；
The detection method of the nondestructive detection system on power distribution network shaft tower chassis, chuck and pulling plate further include: according to chassis lead
Voltage between port, the electric current in the lead of chassis, the voltage between pulling plate lead port, the electric current in pulling plate lead, chuck
The electric current in voltage and chuck lead between lead port calculates the inductance and electricity on power distribution network shaft tower chassis, pulling plate and chuck
After resistance value, the extent of corrosion on power distribution network shaft tower chassis, pulling plate and chuck is obtained.
Preferably, the relationship between the inductance and resistance value of power distribution network shaft tower chassis, pulling plate and chuck are as follows:
Wherein, Vm(t) voltage difference between chassis or pulling plate or chuck lead port；i2It (t) is chassis lead or pulling plate
Electric current in lead or chuck lead；L is the inductance of power distribution network shaft tower chassis or pulling plate or chuck；R is power distribution network shaft tower chassis
Or the resistance of pulling plate or chuck；Voltage difference between the lead port of chassis, the electric current in the lead of chassis, the inductance on chassis and chassis
Resistance it is corresponding；Voltage difference between pulling plate lead port, the electric current in pulling plate lead, the inductance of pulling plate and pulling plate resistance pair
It answers；The resistance correspondence of voltage difference between chuck lead port, the electric current in chuck lead, the inductance of chuck and chuck；
Preferably, induced electromotive force are as follows:
Wherein, V1(t) ' be receiving coil both ends induced electromotive force；i1' (t) be chassis lead or pulling plate lead or chuck
The cut-off current of lead；M1Equivalent mutual inductance between detection bar tower chassis or pulling plate or chuck and receiving coil.
Contemplated above technical scheme through the invention can obtain following compared with prior art
The utility model has the advantages that
(1) present invention connects transmit circuit and chassis by chassis lead, connects transmit circuit and drawing by pulling plate lead
Disk, and connect transmit circuit and chuck by chuck lead, saves transmitting coil, transmit circuit directly to chassis or pulling plate or
Chuck provides pulse excitation electric current, and external electromagnetic field is generated between receiving coil and chassis or pulling plate or chuck, utilizes electromagnetism sense
Principle is answered, receiving coil generates induced electromotive force, avoids and generate inductive electromagnetic between traditional transmitting coil and receiving coil
, the case where generating an induced electromotive force on receiving coil, the present invention obtains induced electromotive force in receiving coil
Reflect the buried depth situation on chassis, pulling plate and chuck.Compared to existing power distribution network shaft tower chassis, the detection system of pulling plate and chuck
Using transmitting coil, the present invention greatly reduces detection error.
(2) present invention is connected suddenly in circuit using the lead port shunt voltage table in shaft tower chassis, pulling plate and chuck
Your element, the first battery, voltmeter, Hall element and first resistor device constitute detection circuit, can measure chassis, pulling plate and
The resistance and inductance of chuck would know that the extent of corrosion of chassis, pulling plate and chuck by analysis resistance and inductance.
(3) present invention is provided with the damped coefficient that potentiometer on-line control receives circuit on receiving circuit, reduces sense
The oscillation of EMF waveform is answered, so that detection structure is more stable.
(4) detection circuit provided by the invention includes first resistor device, can for adjusting the damped coefficient in detection circuit
So that the physical quantity accuracy of measurement is higher, physical quantity includes: in voltage difference and chassis lead between the lead port of chassis
Voltage difference between voltage difference between electric current or pulling plate lead port and the electric current in pulling plate lead or chuck lead port
With the electric current in chuck lead.
Detailed description of the invention
Fig. 1 is the detecting system schematic diagram on power distribution network shaft tower provided by the invention chassis, pulling plate and chuck；
Fig. 2 is receiving coil schematic three dimensional views provided by the invention；
Fig. 3 is receiving coil x/y plane top view provided by the invention；
Fig. 4 is receiving coil xz section plan provided by the invention；
Fig. 5 is detection circuit internal structure chart provided by the invention；
Fig. 6 is influence schematic diagram of the resistance of chassis provided by the invention, pulling plate and chuck to lead port voltage；
Fig. 7 is influence schematic diagram of the inductance of chassis provided by the invention, pulling plate and chuck to lead port voltage；
Fig. 8 is transmit circuit internal structure chart provided by the invention；
Fig. 9 is reception circuit inner structure figure provided by the invention；
Figure 10 is influence schematic diagram of the different buried depth provided by the invention to induced electromotive force waveform；
Figure 11 is the relation schematic diagram of different buried depth provided by the invention Yu induced electromotive force peak value；
Figure 12 is the equivalent model signal of the detection method of power distribution network shaft tower provided by the invention chassis, pulling plate and chuck
Figure；
Description of symbols:
The chassis 1-；2- pulling plate；3- chuck；The buried depth on the chassis 4-；The buried depth of 5- pulling plate；The buried depth of 6- chuck；7- pulling plate is drawn
Line；The one of 8- pulling plate lead draws port；Another extraction port of 9- pulling plate lead；10- transmitting coil；11- receiving coil；
12- receives circuit；13- signal conditioning circuit；14- embeded processor；The end of incoming cables of 15- receiving coil；16- receiving coil
Leading-out terminal；17- detection circuit；The one of the chassis 18- lead draws port；Another extraction port of the chassis 19- lead；20- chuck
The one of lead draws port；Another extraction port of 21- chuck lead；22- soil；One pad of 23- pulling plate；24- pulling plate is another
One pad；25- pulse current；26- equivalent inductance；27- induced current；The internal diameter of 28- receiving coil；29- receiving coil
Outer diameter；30- electric current flows into direction；31- electric current flows out direction；The first battery of 31-；32- first resistor device；33- pulling plate lead
Two voltmeters drawn between port；34- Hall element；The second battery of 35-；Insulated gate of the 36- with anti-paralleled diode is double
Gated transistors；37- capacitor；38- second resistor；39- diode；40- potentiometer.
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.
The present invention provides a kind of power distribution network shaft tower chassis, the detection system of pulling plate and chuck, comprising: transmit circuit 10,
Receiving coil 11 receives circuit 12, signal conditioning circuit 13, embeded processor 14, pulling plate lead 7, chassis lead and chuck
Lead；
Pulling plate lead 7 includes another extraction port 9 of extraction a port 8 and pulling plate lead of pulling plate lead；Receiving coil
End of incoming cables be 15, the leading-out terminal of receiving coil is 16；It is 18 that the one of chassis lead, which draws port, another extraction of chassis lead
Port is 19；It is 20 that the one of chuck lead, which draws port, and another extraction port of chuck lead is 21；22 be soil；Pulling plate one
Pad is 23, and another pad of pulling plate is 24；
Transmit circuit 10 is connect by chassis lead with chassis 1, or is connect by pulling plate lead 7 with pulling plate 2, or pass through card
Disk lead is connect with chuck 3；The output end of receiving coil 11 is connect with the input terminal for receiving circuit 12；Signal conditioning circuit 13
Input terminal is connect with the output end for receiving circuit 12；One input of the output end and embeded processor 14 of signal conditioning circuit 13
End connection；
Transmit circuit 10 is used to provide pulse excitation current source for chassis 1 or pulling plate 2 or chuck 3；Receiving coil 11 is used for
Induced electromotive force is generated by external electromagnetic field；Circuit 12 is received to be used to form closed-loop path with receiving coil 11；Signal demodulation
Circuit 13 is used to acquire the induced electromotive force of the generation of receiving coil 11；Embeded processor 14 is used for through comparison induced electromotive force
The feedback waveform of waveform and standard component obtains the buried depth depth on power distribution network shaft tower chassis 1, pulling plate 2 and chuck 3.
As shown, power distribution network shaft tower chassis 1, pulling plate 2 and chuck 3 are buried in prescribed depth as required in first construction
If power distribution network chassis lead by drawing ground by drawing port 18 and 19 inside shaft tower, pulling plate lead 7 by inside pulling plate by
It draws port 8 and 9 and draws ground, chuck lead is by drawing ground by drawing port 20 and 21 inside shaft tower；
Fig. 2, Fig. 3 and Fig. 4 are respectively receiving coil schematic three dimensional views, receiving coil x/y plane top view and receiving coil
Xz section plan；28 be the internal diameter of receiving coil, and 29 be the outer diameter of receiving coil；30 flow into direction for the electric current of end of incoming cables,
31 flow out direction for the electric current of leading-out terminal；Receiving coil can according to different detection Demand Design multiturn multilayered structures, the number of turns,
The parameters such as the number of plies and line footpath be influence power distribution network shaft tower chassis, pulling plate and underground reinforced structure in chuck and receiving coil it
Between equivalent mutual inductance, then influence detection effect.
Preferably, the detection system of power distribution network shaft tower chassis, pulling plate and chuck further include: detection circuit 17；
The input terminal of detection circuit 17 is connect by chassis lead with chassis 1, or is connect by pulling plate lead 7 with pulling plate 2,
Or it is connect by chuck lead with chuck 3；
The output end of detection circuit and another input terminal of embeded processor connect；
Detection circuit 17 is used to obtain the voltage difference between the lead port of chassis and the electric current in the lead of chassis or pulling plate is drawn
In voltage difference and chuck lead between voltage difference between line end mouth and the electric current in pulling plate lead or chuck lead port
Electric current；
Preferably, detection circuit includes: the first battery 31, voltmeter, Hall element 34 and first resistor device 32；Work
The first battery 31, Hall element 34, first resistor device 32 and power distribution network shaft tower chassis 1 or pulling plate 2 or chuck 3 are gone here and there under state
Connection；Voltmeter is in parallel with chassis 1 or pulling plate 2 or 3 lead port of chuck；First battery 31 provides power supply；First resistor device 32
For adjusting the damped coefficient of detection circuit；Voltmeter measures the voltage difference between chassis 1 or 3 lead port of pulling plate 2 or chuck；
Hall element 34 measures the electric current in chassis 1 or 3 lead of pulling plate 2 or chuck；
Embeded processor 14 is also used to inductance and resistance by calculating power distribution network shaft tower chassis 1, pulling plate 2 and chuck 3
Value obtains the extent of corrosion on power distribution network shaft tower chassis 1, pulling plate 2 and chuck 3；
Fig. 5 is that detection circuit internal structure chart introduces the work of detection circuit by taking the inductance and resistance that detect pulling plate 2 as an example
Make principle, as shown, two ports 8 and 9 and pulling plate 2 of the first battery 31 and first resistor device 32 by pulling plate lead 7
Series connection meets:
Vm(t) voltage difference between pulling plate lead port；i2It (t) is the electric current in pulling plate lead；L is power distribution network shaft tower
The inductance of pulling plate；R is the resistance of power distribution network shaft tower pulling plate；Voltmeter 33 is for obtaining 2 lead port 8 of pulling plate and lead port 9
Between voltage difference, Hall element 34 is used to obtain electric current in 2 lead of pulling plate；The output end of detection circuit 17 and embedded place
Another input terminal connection for managing device, by the voltage difference V between 2 lead port 8 of pulling plate and lead port 9m(t) and pulling plate 2 is drawn
Electric current i in line2(t) it inputs in embeded processor, between two lead ports 8 and 9 by steel mesh in analysis pulling plate 2
Voltage difference and lead in electric current, the resistance value and inductance in pulling plate 2 can be obtained, and extent of corrosion is judged with this.Together
Reason, detection circuit are applied to that the buried depth on chassis 1 can be obtained when lead port 18 and 19, can obtain when applied to lead port 20 and 21
The buried depth of card taking disk 3；In other words, the inductance of power distribution network shaft tower chassis, pulling plate and chuck and resistance value are all satisfied following relationship:
Wherein, Vm(t) voltage difference between chassis or pulling plate or chuck lead port；i2It (t) is chassis lead or pulling plate
Electric current in lead or chuck lead；L is the inductance of power distribution network shaft tower chassis or pulling plate or chuck；R is power distribution network shaft tower chassis
Or the resistance of pulling plate or chuck；Voltage difference between the lead port of chassis, the electric current in the lead of chassis, the inductance on chassis and chassis
Resistance it is corresponding；Voltage difference between pulling plate lead port, the electric current in pulling plate lead, the inductance of pulling plate and pulling plate resistance pair
It answers；Voltage difference between chuck lead port, the electric current in chuck lead, the inductance of chuck are corresponding with the resistance of chuck；
Fig. 6 is influence of the inductance on power distribution network shaft tower chassis, pulling plate and chuck to voltage waveform between corresponding lead port,
As can be seen from Figure 6, with the increase of chassis or pulling plate or the inductance value of chuck, the lead port of corresponding chassis or pulling plate or chuck it
Between voltage waveform broaden, and acquire waveform negative peak absolute value it is increasing；
Fig. 7 is influence of the resistance on power distribution network shaft tower chassis, pulling plate and chuck to voltage waveform between corresponding lead port,
As can be seen from Figure 7, with the increase of chassis or pulling plate or the resistance value of chuck, the lead port of corresponding chassis or pulling plate or chuck it
Between voltage waveform it is constant, but acquire waveform negative peak absolute value it is smaller and smaller；
Preferably, transmit circuit include: the second battery 35, the insulated gate bipolar transistor 36 with anti-paralleled diode,
Capacitor 37, second resistor 38 and diode 39；Second battery 35 and the insulated gate bipolar transistor with anti-paralleled diode
Pipe 36 is connected；Second resistor 38 is in parallel with capacitor 37 after connecting with diode 39；
Second battery 35 is for providing power supply energy；Insulated gate bipolar transistor 36 with anti-paralleled diode is for controlling
System applies the time of pulse excitation；Capacitor 37, second resistor 38 and diode 39 are used for the exhausted of anti-paralleled diode
Edge grid bipolar transistor 36 provides freewheeling path after turning off；
Fig. 8 is transmit circuit internal structure chart, tells about transmit circuit by taking 7 energization situation of pulling plate lead in pulling plate 2 as an example
Design principle, the second battery 35 provides energy, in t0The insulated gate bipolar transistor of moment conducting conduction band anti-paralleled diode
Pipe 36, the power distribution network shaft tower pulling plate 2 of pulling plate lead 7 and the second battery 35 form access, and pulling plate wire current is started from scratch increasing
Greatly, to maintaining a Duan Pingding after maximum value；t1Insulated gate bipolar transistor 36 of the moment with anti-paralleled diode disconnects, and pulling plate is drawn
The power distribution network shaft tower pulling plate 2 of line 7 and second resistor 38 and diode 39 form continuous current circuit and to 37 reverse chargings of capacitor,
Since the capacitance of capacitor 37 is smaller, the rapid resonance of electric current in pulling plate lead 7 is maintained zero constant to zero, under
The insulated gate bipolar transistor 36 of one sub-band anti-paralleled diode is connected, and repeats the above process；Similarly, using 18 He of lead port
19 can be used for applying pulse excitation electric current to chassis 1, can be used for applying chuck 3 pulse excitation electricity using lead port 20 and 21
Stream.
Preferably, receiving circuit includes potentiometer, and potentiometer is connected with receiving coil, for adjusting the damping for receiving circuit
Coefficient reduces induced electromotive force oscillating waveform；
Fig. 9 is to receive circuit inner structure figure, from figure it is found that receiving circuit includes potentiometer 40；Receiving coil 11 passes through
Inlet wire port 15, outlet port 16 are connected with potentiometer 39, are received circuit and are mainly used for acquiring the induction at 11 both ends of receiving coil
EMF waveform, and the feedback waveform for being entered into signal conditioning circuit 13 and embeded processor 14 and standard component carries out pair
Than obtaining buried depth situation, potentiometer 40 is used to adjust the damped coefficient of reception circuit to reduce the oscillation of induced electromotive force；
Preferably, induced electromotive force are as follows:
Wherein, V1(t) ' be receiving coil both ends induced electromotive force；i1' (t) be chassis lead or pulling plate lead or chuck
The cut-off current of lead；M1Equivalent mutual inductance between detection bar tower chassis or pulling plate or chuck and receiving coil.
Figure 10 is the influence that different buried depth acquires induced electromotive force waveform to receiving coil, and Figure 11 is different buried depth and receives
The relationship of coil both ends induced electromotive force peak value, from Figure 10 and Figure 11 it is found that deeper and deeper with burying, induced electromotive force acquisition
The peak value of waveform is gradually reduced as buried depth depth becomes larger.
It is emphasized that: the specific loop construction in the present invention includes but is not limited to the structure in the application.
Nondestructive detection system based on above-mentioned power distribution network shaft tower chassis, chuck and pulling plate, the present invention provides a kind of distribution
Net shaft tower chassis, chuck and pulling plate lossless detection method, comprising:
(1) apply pulse current on chassis or pulling plate or chuck, obtain space induction field；
(2) receiving coil generates induced electromotive force under the action of the induction field of space；
(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；
As shown in Figure 1, for applying exciting current in pulling plate 2, the principle of summary detection buried depth.In the detection process,
Think that pulling plate 2 applies exciting current by pulling plate lead 7, according to electromagnetic induction principle, when pulse current shutdown moment, shaft tower pulling plate
2 surroundings can generate inductive impulse electromagnetic field, and spread to surrounding space；Under the action of inductive impulse electromagnetic field, receiving coil
It is acquired on 11 and induced electromotive force V is generated by the mutual inductance effect between pulling plate 2 and receiving coil 111(t)'；Due to shaft tower chassis, draw
The buried depth of disk and chuck will affect the acquisition waveform of induced electromotive force on receiving coil 11, therefore, by by receiving coil 11 into
Acquisition Waveform Input signal conditioning circuit 13 and embeded processor 14 between line end 15 and leading-out terminal 16 are analyzed,
That is: with the feedback waveform V of standard component1(t) it compares, which can efficiently verify power distribution network under conditions of no-dig technique
Whether the depth of burying of shaft tower pulling plate meets the requirements, and same detection method is applied to can be used to detect when lead port 18 and 19
The buried depth on chassis can be used to detect the buried depth of chuck when applied to lead port 20 and 21.
Figure 12 is the coupling model on power distribution network shaft tower chassis, pulling plate and chuck detection method, for detecting pulling plate 2,25
Indicate the pulse current i being passed through in bracing wire lead 71(t), the 26 equivalent mutual inductance between pulling plate 2 and receiving coil 11,27 be to connect
The induced current i generated in take-up circle 112(t)；It, can shadow when power distribution network shaft tower chassis, pulling plate and the chuck depth of burying change
Original magnetic circuit between pulling plate 2 to be detected and receiving coil 11 is rung, its equivalent mutual inductance is influenced；Assuming that M is inbuilt bar as requested
Tower chassis.Equivalent mutual inductance when pulling plate and chuck composition magnetic circuit between receiving coil, i1' (t) be pulling plate lead shutdown electricity
Stream, can obtain according to the law of electromagnetic induction:
Wherein, V1(t) ' be receiving coil both ends induced electromotive force；i1' (t) be chassis lead or pulling plate lead or chuck
The cut-off current of lead；M1Equivalent mutual inductance between detection bar tower chassis or pulling plate or chuck and receiving coil；V1It (t) is mark
The feedback waveform of quasi- part；
Due to V1(t) ' it is the magnetic circuit for participating in constituting by power distribution network shaft tower chassis, pulling plate and chuck, position is distributed comprising underground
Confidence breath；When power distribution network chassis, pulling plate and the chuck of various models are constructed according to standard, by applying into reinforcing bar web frame
Excitation can collect the feedback waveform V that different model matches the quasi- part of subscripting on receiving coil1(t), therefore in actual acquisition believe
Number V1(t) ' and standard component feedback signal V1(t) it compares, the location information of shaft tower component to be detected can be obtained.Same principle
The buried depth that chassis is obtained when applied to lead port 18 and 19, obtains the buried depth of chuck when applied to lead port 20 and 21, should
Detection method efficiently can verify whether power distribution network shaft tower is buried as requested under conditions of no-dig technique.
Preferably, the detection method of the nondestructive detection system of power distribution network shaft tower chassis, chuck and pulling plate further include: the bottom of according to
Voltage between disk lead port, the electric current in the lead of chassis, the voltage between pulling plate lead port, the electricity in pulling plate lead
The electric current in voltage and chuck lead between stream, chuck lead port, calculates the electricity on power distribution network shaft tower chassis, pulling plate and chuck
After sense and resistance value, the extent of corrosion on power distribution network shaft tower chassis, pulling plate and chuck is obtained.
For example, being drawn when being passed through a constant current into pulling plate 2 by pulling plate lead 7 by detection circuit 17
The voltage difference of disk lead drawn between port 8 and 9, and input in embeded processor and carried out pair with standard component feedback waveform
Than the situation of change of power distribution network shaft tower pulling plate inductance and resistance value can be obtained, and therefore judge the extent of corrosion of pulling plate；Equally
Detection method be applied to lead port 18 and 19 when detect chassis inductance and resistance value, be applied to lead port 20 and 21 when
Detect the inductance and resistance value of chuck.
In conclusion the present invention connects transmit circuit and chassis by chassis lead, transmitting electricity is connected by pulling plate lead
Road and pulling plate, and connect transmit circuit and chuck by chuck lead, save transmitting coil, transmit circuit directly to chassis or
Pulling plate or chuck provide pulse excitation electric current, and external electromagnetic field is generated between receiving coil and chassis or pulling plate or chuck, utilize
Electromagnetic induction principle, receiving coil generate induced electromotive force, avoid and generate sense between traditional transmitting coil and receiving coil
Electromagnetic field is answered, the case where generating an induced electromotive force on receiving coil, the present invention obtains induction electric in receiving coil
Gesture can reflect the buried depth situation of chassis, pulling plate and chuck.Compared to the inspection on existing power distribution network shaft tower chassis, pulling plate and chuck
Examining system uses transmitting coil, and the present invention greatly reduces detection error.
The present invention uses the lead port shunt voltage table in shaft tower chassis, pulling plate and chuck, Hall of connecting in circuit
Element, the first battery, voltmeter, Hall element and first resistor device constitute detection circuit, can measure chassis, pulling plate and card
The resistance and inductance of disk would know that the extent of corrosion of chassis, pulling plate and chuck by analysis resistance and inductance.
The present invention is provided with the damped coefficient that potentiometer on-line control receives circuit on receiving circuit, reduces induced electricity
The oscillation of EMF waveform, so that detection structure is more stable.
Detection circuit provided by the invention includes first resistor device, for adjusting the damped coefficient in detection circuit, can be made
The accuracy for the physical quantity that must be measured is higher, and physical quantity includes: in voltage difference and chassis lead between the lead port of chassis
Voltage difference between voltage difference between electric current or pulling plate lead port and the electric current in pulling plate lead or chuck lead port
With the electric current in chuck lead.
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 (10)
1. the detection system on a kind of power distribution network shaft tower chassis, pulling plate and chuck characterized by comprising transmit circuit receives line
Circle receives circuit, signal conditioning circuit, embeded processor, pulling plate lead, chassis lead and chuck lead；
Transmit circuit connect by chassis lead with chassis, or is connect by pulling plate lead with pulling plate, or pass through chuck lead and
Chuck connection；The output end of receiving coil is connect with the input terminal for receiving circuit；The input terminal and reception electricity of signal conditioning circuit
The output end on road connects；The output end of signal conditioning circuit and an input terminal of embeded processor connect；
Transmit circuit is used to provide pulse excitation current source for chassis or pulling plate or chuck；Receiving coil is for passing through spatial electromagnetic
Field generates induced electromotive force；Circuit is received to be used to form closed-loop path with receiving coil；Signal demodulating circuit is received for acquiring
The induced electromotive force that coil generates；Embeded processor is used for the feedback wave by comparison induced electromotive force waveform and standard component
Shape obtains the buried depth depth on power distribution network shaft tower chassis, pulling plate and chuck.
2. detection system according to claim 1, which is characterized in that further include: detection circuit；
The input terminal of detection circuit is connect by chassis lead with chassis, or is connect by pulling plate lead with pulling plate, or pass through card
Disk lead is connect with chuck；The connection of another input terminal of its output end and embeded processor；
Detection circuit is for obtaining the voltage difference between the lead port of chassis and the electric current in the lead of chassis or pulling plate lead port
Between voltage difference and the electric current in pulling plate lead or the electric current in the voltage difference and chuck lead between chuck lead port；
Embeded processor is also used to inductance and resistance value by calculating power distribution network shaft tower chassis, pulling plate and chuck, and acquisition is matched
Power grid shaft tower chassis, pulling plate and chuck extent of corrosion.
3. detection system according to claim 2, which is characterized in that power distribution network shaft tower chassis, pulling plate and chuck
Relationship between inductance and resistance value are as follows:
Wherein, Vm(t) voltage difference between chassis or pulling plate or chuck lead port；i2It (t) is chassis lead or pulling plate lead
Or the electric current in chuck lead；L is the inductance of power distribution network shaft tower chassis or pulling plate or chuck；R is power distribution network shaft tower chassis or drawing
The resistance of disk or chuck；Voltage difference between the lead port of chassis, the electric current in the lead of chassis, the inductance on chassis and the electricity on chassis
Resistance corresponds to；Voltage difference between pulling plate lead port, the electric current in pulling plate lead, the resistance of the inductance of pulling plate and pulling plate are corresponding；
The resistance correspondence of voltage difference between chuck lead port, the electric current in chuck lead, the inductance of chuck and chuck.
4. detection system according to claim 1, which is characterized in that induced electromotive force are as follows:
Wherein, V1(t) ' be receiving coil both ends induced electromotive force；i1' (t) be chassis lead or pulling plate lead or chuck lead
Cut-off current；M1Equivalent mutual inductance between detection bar tower chassis or pulling plate or chuck and receiving coil.
5. detection system according to claim 2 or 3, which is characterized in that the detection circuit include: the first battery,
Voltmeter, Hall element and first resistor device；
The first battery, Hall element, first resistor device are connected with power distribution network shaft tower chassis or pulling plate or chuck under working condition；
Voltmeter is in parallel with chassis or pulling plate or chuck lead port；First battery provides power supply；First resistor device is for adjusting inspection
The damped coefficient of slowdown monitoring circuit；Voltmeter measures the voltage difference between chassis or pulling plate or chuck lead port；Hall element measurement
Electric current in chassis or pulling plate or chuck lead.
6. detection system according to any one of claims 1 to 5, which is characterized in that the reception circuit includes potentiometer, electricity
Position device is connected with receiving coil, for adjusting the damped coefficient for receiving circuit, reduces induced electromotive force oscillating waveform.
7. the detection method based on detection system described in claim 1 characterized by comprising
(1) apply pulse current on chassis or pulling plate or chuck, obtain space induction field；
(2) receiving coil generates induced electromotive force under the action of the induction field of space；
(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 further include: according to the electricity between the lead port of chassis
Pressure, the electric current in the lead of chassis, the voltage between pulling plate lead port, the electric current in pulling plate lead, between chuck lead port
Voltage and chuck lead in electric current, calculate power distribution network shaft tower chassis, pulling plate and chuck inductance and resistance value after, acquisition is matched
Power grid shaft tower chassis, pulling plate and chuck extent of corrosion.
9. detection method according to claim 7 or 8, 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 chassis lead or pulling plate lead or chuck lead
Cut-off current；M1Equivalent mutual inductance between detection bar tower chassis or pulling plate or chuck and receiving coil.
10. detection method according to claim 8, which is characterized in that power distribution network shaft tower chassis, pulling plate and chuck
Relationship between inductance and resistance value are as follows:
Wherein, Vm(t) voltage difference between chassis or pulling plate or chuck lead port；i2It (t) is chassis lead or pulling plate lead
Or the electric current in chuck lead；L is the inductance of power distribution network shaft tower chassis or pulling plate or chuck；R is power distribution network shaft tower chassis or drawing
The resistance of disk or chuck；Voltage difference between the lead port of chassis, the electric current in the lead of chassis, the inductance on chassis and the electricity on chassis
Resistance corresponds to；Voltage difference between pulling plate lead port, the electric current in pulling plate lead, the resistance of the inductance of pulling plate and pulling plate are corresponding；
The resistance correspondence of voltage difference between chuck lead port, the electric current in chuck lead, the inductance of chuck and chuck.
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