CN104614439B - A kind of the cannot-harm-detection device and detection method based on electric field fingerprint method - Google Patents
A kind of the cannot-harm-detection device and detection method based on electric field fingerprint method Download PDFInfo
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- CN104614439B CN104614439B CN201510055395.XA CN201510055395A CN104614439B CN 104614439 B CN104614439 B CN 104614439B CN 201510055395 A CN201510055395 A CN 201510055395A CN 104614439 B CN104614439 B CN 104614439B
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Abstract
A kind of the cannot-harm-detection device and detection method based on electric field fingerprint method, belong to pipeline Dynamic Non-Destruction Measurement apparatus field.Including pipe under test（2）, it is characterised in that：In pipe under test（2）On be uniformly arranged and multiple catch electrodes（4）, catching electrode（4）Two outer ends be respectively installed with an electric current input block for input stimulus current signal, while be provided with one with electric current input block and catch electrode（4）The control unit being respectively connected with.The charge and discharge control flow and the signal acquisition transmission flow to signal acquisition module realization control of control are realized to the power supply module including controller.The cannot-harm-detection device and detection method based on electric field fingerprint method of the invention, realize to conveyance conduit corrosion condition high accuracy, Non-Destructive Testing, while avoiding excessive track laying, reduce measurement cost.
Description
Technical field
A kind of the cannot-harm-detection device and detection method based on electric field fingerprint method, belong to pipeline detection technique field.
Background technology
In the prior art, corrosive pipeline is that oil transportation field occurs the main cause of accident, and specific form can divide
For：Homogeneous corrosion, local corrosion, pitting corrosion, weld corrosion and erosion etc..At present, generally using resistance probe method and polarization probe
Method monitors the corrosion condition of pipeline on-line, but these methods can only carry out indirect homogeneous corrosion detection, and has damage to tube wall, together
When maintenance cost and parking start-up cost it is higher and helpless to the great local corrosion of harmfulness.
The measurement of corrosive pipeline is carried out using electric field fingerprint method, it is compared with prior art, direct, smart with measurement in theory
Degree and reliability is high, adaptable advantage, and to tube wall not damaged.But at this stage, pipeline is carried out using electric field fingerprint method
The measurement of corrosion is prevalent in theoretical research stage, not yet ripe to implement.Transfer pipeline is often laid on more remote simultaneously
Place, carrying out needing to expend substantial amounts of manpower and materials when pipeline is detected, and need to lay corresponding circuit and aided in, examine
Survey relatively costly.
The content of the invention
The technical problem to be solved in the present invention is：Overcome the deficiencies in the prior art, there is provided one kind is based on electric field fingerprint method, real
Show to conveyance conduit corrosion condition high accuracy, Non-Destructive Testing, while avoiding excessive track laying, reduced measurement cost
The cannot-harm-detection device and detection method based on electric field fingerprint method.
The technical solution adopted for the present invention to solve the technical problems is：The Non-Destructive Testing for being based on electric field fingerprint method is filled
Put, including pipe under test, it is characterised in that：Multiple is uniformly arranged in pipe under test flutters and catch electrode, electrode institute is caught in all flutterring
An electric current input block for input stimulus current signal is respectively installed with two outer ends in region, while being provided with one
With electric current input block and flutter and catch the control unit that electrode is respectively connected with, control unit includes a controller and by controlling
Power supply module and signal acquisition module that device is controlled respectively.
Preferably, described electric current input block is electrode sleeve, and electrode sleeve includes a becket and is uniformly arranged on
The multiple electrodes pole of becket outlet, becket is provided with a closeable breach, and the breach two ends of becket pass through
Bolt is attached, and electrode sleeve is turned into a closed loop configuration, and electrode terminal is connected with described control unit.
Preferably, described power supply module include programmable DC power supply, battery and TRT, TRT with
Controller is connected, and controller is interconnected with battery, and controller is connected with programmable DC power supply, the output of programmable DC power supply
End is connected with described electrode terminal.
Preferably, described TRT includes solar panel or/and wind-driven generator.
Preferably, it is provided between described programmable DC power supply and electrode terminal for gathering programmable DC electricity
The current collecting device of ource electric current output valve, the output end of current collecting device is connected to the controller.
Preferably, described signal acquisition module includes matrix switch, the voltage acquisition card that the controller is connected simultaneously
And wireless communication module, matrix switch, voltage acquisition card and wireless communication module be sequentially connected, and electrode connection is caught in described flutterring
To matrix switch.
A kind of lossless detection method based on electric field fingerprint method, it is characterised in that：Including controller to the power supply module
The charge and discharge control flow for realizing control and the signal acquisition transmission flow that control is realized to the signal acquisition module.
Preferably, described charge and discharge control flow, comprises the following steps：
Step 1001, starts；
Controller proceeds by charge and discharge control；
Step 1002, detects the output current Ia of TRT；
The current value Ia of controller detection TRT output；
Whether step 1003, current value Ia reaches continuous firing state current level I1；
Controller judges whether the current value Ia of TRT output reaches the current value I1 of continuous firing state, if reached
To current value I1, step 1004 is performed, if not up to current value I1, perform step 1007；
Whether step 1004, battery is full state；
Controller judges whether battery is full state, if battery is full state, performs step 1006, if
Battery is underfill state, performs step 1005；
Step 1005, TRT is powered, continuous firing, and battery is charged；
Controller control is powered by TRT, and controller controls programmable DC by signal acquisition transmission flow
Power supply is in continuous firing state, while being charged to battery by controller control；
Step 1006, TRT is powered, continuous firing, and battery is charged；
Controller control is powered by TRT, and controller controls programmable DC by signal acquisition transmission flow
Power supply is in continuous firing state, and controller is released the electricity that TRT sends by dissipative cell；
Whether step 1007, battery output current value Ib reaches continuous firing state current level I1；
Controller judges whether the current value Ib of TRT output reaches the current value I1 of continuous firing state, if reached
To current value I1, step 1008 is performed, if not up to current value I1, perform step 1009；
Step 1008, electric power storage is powered, continuous firing, and battery is charged；
Controller control is powered by battery, and controller controls programmable DC electricity by signal acquisition transmission flow
Source is in continuous firing state, while being powered to battery by controller control control TRT；
Whether step 1009, current value Ia reaches continuous firing state current level I1；
Controller judges whether the current value Ia of TRT output meets the current value I2 of discontinuous operation state, if full
Sufficient current value I2, performs step 1010, if being unsatisfactory for current value I2, performs step 1011；
Step 1010, TRT is powered, discontinuous operation, and battery is charged；
Controller control is powered by TRT, and controller controls programmable DC by signal acquisition transmission flow
Power supply is in discontinuous operation state, and battery is charged by controller control TRT；
Whether step 1011, current value Ib reaches continuous firing state current level I2；
Controller judges whether the current value Ib of battery output meets the current value I2 of discontinuous operation state, if met
Current value I2, performs step 1012, if being unsatisfactory for current value I2, performs step 1013；
Step 1012, storage battery power supply, discontinuous operation charges to battery；
Controller control is powered by battery, and controller controls programmable DC electricity by signal acquisition transmission flow
Source is in discontinuous operation state, and battery is charged by controller control TRT；
Step 1013, cut-out battery output, is stopped；
Controller cuts off the output loop of battery, and controller controls whole detection means to be stopped.
Preferably, described signal acquisition transmission flow, comprises the following steps：
Step 2001, starts；
Controller proceeds by signal acquisition transmission work；
Step 2002, if perform continuous firing state：
Controller judges whether condition of power supply supports that programmable DC power supply keeps continuing work according to charge and discharge control flow
Make state, if supporting that programmable DC power supply keeps continuous firing state, perform step 2003, if not supporting programmable straight
Stream power supply keeps continuous firing state, performs step 2008；
Step 2003, sends continuous firing instruction；
Controller sends continuous firing and instructs to programmable DC power supply, and programmable DC power supply is according to programmable DC electricity
Source workflow carries out continuous firing；
Step 2004, gathers programmable DC electric power outputting current value；
Controller obtains the output current of programmable DC power supply by current collecting device；
Whether step 2005, current value meets setting value；
Controller judges whether the output current of programmable DC power supply exceedes current threshold, if it exceeds current threshold,
Step 2007 is performed, if not less than current threshold, performing step 2006；
Step 2006, continuous collecting voltage signal simultaneously sends；
Controller is sent signal by wireless base station apparatus by the continuous collection voltages signal of voltage acquisition clamping；
Step 2007, alarm, sends alarm signal；
Controller is alarmed, and is sent alarm signal by wireless base station apparatus；
Step 2008, sends discontinuous operation instruction；
Controller sends discontinuous operation and instructs to programmable DC power supply, and programmable DC power supply is according to programmable DC electricity
Source workflow carries out discontinuous operation；
Step 2009, gathers programmable DC electric power outputting current value；
Controller obtains the output current of programmable DC power supply by current collecting device；
Whether step 2010, current value meets setting value；
Controller judges whether the output current of programmable DC power supply exceedes current threshold, if it exceeds current threshold,
Step 2007 is performed, if not less than current threshold, performing step 2011；
Step 2011, interim acquisition voltage signal simultaneously sends；
Controller is sent signal by wireless base station apparatus by voltage acquisition card interim acquisition voltage signal.
Preferably, described programmable DC power work flow, comprises the following steps：
Step 3001, starts；
Programmable DC power supply is started working；
Step 3002, receives controller instruction；
Programmable DC power supply receives the operating state instruction that control sends；
Step 3003, if be continuous firing status command；
Whether what programmable DC power supply judged that controller sends is continuous firing instruction, if continuous firing is instructed,
Step 3004 is performed, step 3005 is otherwise performed；
Step 3004, into continuous firing state；
Programmable DC power supply to flutter catch electrode provide follow current pumping signal；
Step 3005, into discontinuous operation state；
Programmable DC power supply to flutter catch electrode provide intermittent current pumping signal.
Compared with prior art, the present invention is had an advantageous effect in that：
1st, based on electric field fingerprint method, realize to conveyance conduit corrosion condition high accuracy, Non-Destructive Testing.
2nd, power supply is realized using solar energy and wind energy, while realizing the transmission of data by way of being wirelessly transferred, it is to avoid
The long range laying of circuit, reduces measurement cost.
Need what is be respectively provided with when the 3rd, instead of and realize generating electricity by wind energy or solar energy in the prior art by controller
The charging-discharging controller of wind energy and solar energy, reduces holistic cost, and unification is controlled by controller, integrated level and reliability
Property is higher.
4th, current signal is applied to pipe under test by using electrode sleeve, because the border of electrode sleeve is accessed as electric current
The electric field line formed between point, therefore two electrode sleeves is mutually parallel lines, therefore CURRENT DISTRIBUTION in whole voltage acquisition area is equal
It is even, thus can significantly less test error, raising certainty of measurement in measurement.
Brief description of the drawings
Fig. 1 is the cannot-harm-detection device structural representation based on electric field fingerprint method.
Fig. 2 is the cannot-harm-detection device electrode sleeve structural representation based on electric field fingerprint method.
Fig. 3 is the cannot-harm-detection device electric field line distribution schematic diagram based on electric field fingerprint method.
Fig. 4 is prior art electric field line distribution schematic diagram.
Fig. 5 is the cannot-harm-detection device control unit functional-block diagram based on electric field fingerprint method.
Fig. 6 is the lossless detection method charge and discharge control flow chart based on electric field fingerprint method.
Fig. 7 is the lossless detection method signal acquisition transmission flow figure based on electric field fingerprint method.
Fig. 8 is the lossless detection method programmable DC power work flow chart based on electric field fingerprint method.
Wherein：1st, electrode sleeve 2, pipe under test 3, voltage acquisition area 4, flutter and catch electrode 5, reference plate 6, metal
Ring 7, electrode terminal 8, electric field line.
Specific embodiment
Fig. 1 ~ 8 are highly preferred embodiment of the present invention, and 1 ~ 8 the present invention will be further described below in conjunction with the accompanying drawings.
As shown in figure 1, the cannot-harm-detection device based on electric field fingerprint method, including one section of pipe under test 2, in pipe under test 2
Surface is provided with voltage acquisition area 3, and voltage acquisition area 3 is generally located on the easy position for being subject to corrode in pipe under test 2.In electricity
The side of acquisition zone 3 is pressed to be provided with one piece of reference plate 5 for being covered in the surface of pipe under test 2, in voltage acquisition area 3 and reference plate
Some flutterring is provided with 5 and catches electrode 4, adjacent two flutter that to catch the distance between electrode 4 identical.In voltage acquisition area 3 and reference
The outside two ends of plate 5 are respectively arranged with an electrode sleeve 1, and current signal, electric current are applied to pipe under test 2 by two electrode sleeves 1
Signal flows through voltage acquisition area 3 and reference plate 5.The control list of the cannot-harm-detection device based on electric field fingerprint method is provided with simultaneously
Unit（It is not drawn into Fig. 1）, the electrode sleeve 1 at control unit and two ends and flutter and catch electrode and be connected, believe to the conveying electric current of electrode sleeve 1
Number；Flutter and catch electrode 4 while being individually connected with control unit, the voltage signal of its own is delivered into control unit.
Reference plate 5 is the influence of exclusion temperature and curent change, while being set to gather the purpose of across comparison parameter
Put, the material of reference plate 5, thickness are identical with pipe under test 2 and are insulated between pipe under test 2, voltage acquisition area 3 and reference plate
The density of setting that flutterring on 5 catches electrode 4 is identical.
As shown in Fig. 2 electrode sleeve 1 includes one with becket jaggy 6, it is evenly arranged with the outlet of becket 6
Some electrode terminals 7 being vertically arranged, all electrode terminals 7 are connected with above-mentioned control unit, and it is right to be realized by electrode terminal 7
The input of the current signal of pipe under test 2.The breach two ends of becket 6 can be attached by bolt, electrode sleeve 1 is closed as one
Ring structure.In actual installation, the electrode sleeve 1 at two ends is respectively sleeved at the outer end of voltage acquisition area 3 and reference plate 5, so
Fasten the surface for making becket 6 be close to pipe under test 2 by bolt afterwards, because becket 6 has certain ductility,
Therefore becket 6 can be in close contact with pipe under test 2, therefore can realize good conductive characteristic, when the outer surface of pipe under test 2
When irregular, also conductive paste can be added between becket 6 and pipe under test 2, to increase electric conductivity.It is actually used at the scene
When, after electrode sleeve 1 being fixed into completion, and wire connection is completed, can be carried out using waterproof material in the outside of electrode sleeve 1
Swathe, to strengthen waterproof, the humidity resistance of electrode sleeve 1, improve the adaptability of field work.
The general principle of electric field fingerprint method is：Electrode 4 is caught that will flutter and after reference plate 5 fixes completion, to pipe under test 2
Apply high current signal, flutterred by some in voltage acquisition area 3 and catch electrode 4 and measure and record the initial configuration of pipe under test 2
Precise voltage signal, as the reference value of the pipe under test 2.After equipment operation a period of time, the metal of pipe under test 2
Structure is corroded, by flutter catch electrode 4 measure metal structure voltage characteristic slight change, the voltage characteristic that will be measured with it is intact
Reference value when falling into structure is compared, and thus judges the defects such as metal loss because corrosion causes, crackle or groove.
Flutter that to catch the distance between electrode 4 identical due to adjacent two, with reference to resistance calculations formulaUnderstand：It is adjacent
Two flutter catch electrode 4 between resistance value it is identical, in combination with Ohm's law formulaUnderstand：When pipe under test 2 is not corroded
When, after electric current is applied to pipe under test 2, adjacent two to flutter the magnitude of voltage caught between electrode 4 equal.When pipe under test 2 occurs
After corrosion, at corrosion two flutter the voltage caught between electrode 4 changes.
In the prior art, typically choose at 2 points as electric current access point in the outside of voltage acquisition area 3 and reference plate 5.
When current signal is applied to pipe under test 2 by two point form, the electric field line 8 between two electric current access points is presented shown in Fig. 4
Fusiform, therefore CURRENT DISTRIBUTION in whole voltage acquisition area 3 is uneven, causes to flow through respectively to be flutterred in voltage acquisition area 3 and catches electrode 4
Current value it is unequal, i.e., adjacent two to flutter the magnitude of voltage caught between electrode 4 different, therefore measured deviation occurs in measurement,
Certainty of measurement is caused to decline.
In this cannot-harm-detection device based on electric field fingerprint method, electric current is applied to pipe under test 2 by using electrode sleeve 1
During signal, because the border of electrode sleeve 1 is as the electric field line 8 formed between electric current access point, therefore two electrode sleeves 1 such as figure
Parallel lines are mutually shown in 3, therefore in the homogeneous current distribution in whole voltage acquisition area 3, are flowed through respectively to be flutterred in voltage acquisition area 3 and is caught electricity
The current value of pole 4 is equal, thus can significantly less test error, raising certainty of measurement in measurement.
In functional-block diagram as shown in Figure 5, black arrow represents that power supply signal is moved towards, and white arrow represents measurement letter
Number trend.The control unit of the cannot-harm-detection device based on electric field fingerprint method, including：Controller, programmable DC power supply, voltage
Capture card, matrix switch, battery, wireless communication module and TRT.In this Non-Destructive Testing based on electric field fingerprint method
In device, TRT includes one group of solar panel and one or more wind-driven generator, because transfer pipeline typically spreads
More remote area is located at, self power generation can be realized by TRT, simultaneously because wireless communication module is employed, while
Solve the problems, such as that signal is wirelessly transferred, therefore avoid the long range laying of supply line and signal transmission line simultaneously to ask
Topic, has saved cost.
Solar panel and wind-driven generator are connected with controller simultaneously, and the electric energy that will be sent delivers to controller, by controlling
Device processed is allocated.Controller is interconnected with battery, can be delivered to the electric energy that solar panel or/and wind-driven generator send
Battery is stored, and the electric energy that battery memory storage can also be used is powered to other equipment.Controller respectively with voltage
Capture card, programmable DC power supply and wireless communication module are connected, and for it is powered.
The power output end of programmable DC power supply is by the electrode pole on a current collecting device and above-mentioned electrode sleeve 1
Post 7 is connected, and direct current signal is delivered into electrode sleeve 1 by programmable power supply, and the output end of current collecting device is connected with controller,
Current collecting device gathers the current value of programmable DC power supply output, and the current value that will be collected is delivered in controller.On
Flutterring of stating is caught electrode 4, matrix switch, voltage acquisition card and wireless communication module and is sequentially connected, and voltage acquisition card passes through matrix
Each flutters the magnitude of voltage for catching electrode 4 for switch collection circulation, and is sent out by wireless communication module.
In the prior art, it is necessary to be respectively provided with filling for wind energy and solar energy when realizing generating electricity by wind energy or solar energy
Discharge controller, or wind/light complementation controller realization is set.In this cannot-harm-detection device based on electric field fingerprint method, pass through
Controller instead of the function of all kinds of charging-discharging controllers in the prior art.Therefore in this Non-Destructive Testing based on electric field fingerprint method
In device, eliminate all kinds of charging-discharging controllers, reduce holistic cost, and unification is controlled by controller, integrated level and
Reliability is higher.
Controller supports four core Intel Atom using the expansible fan-free embedded computer of MXC-2300 series
E3845 1.91GHz SoC processors, two DDR3LSO-DIMM slots, maximum supports 8GB internal memories, 2x PCI+1x
PCIe x4 or 3x PCI expansion slots, built-in two CAN mouthfuls and 16 channel separation DI and DO with isolation, two can software volume
+ two RS-232 ports of RS-232/422/485 of journey reinforce level, support -20 °C to+70 °C fan-free operations.It is programmable
Dc source uses IT6723 series of programmable and dc source, and standard configuration has RS232/USB/GPIB communication interfaces, and output has out
Control is closed, the voltage x current value output that can be compiled according to program is adjusted using knob to voltage and current.Voltage acquisition
Card can be more using PXI/DAQ/DAQe-2200 series capture cards, 512 configurable unit channel gain sequences, Channel 12-Bit
Road switches simulation output, with waveform generating function, in the present embodiment, preferably DAQ-2200 series capture cards.Matrix switch is adopted
With the matrix module of model PXI-7931, compatible PXI Rec.2.2 specifications, up to 32 intersection point DODT unlatching relays,
Multiple module synchronization is realized by PXI Trigger Bus and star-like triggering.
The cannot-harm-detection device method based on electric field fingerprint method, including controller is realized to TRT and battery control
The charge and discharge control flow of system, and realize flutterring the signal acquisition transmission flow of collection and the transmission of catching electrode 4.As shown in fig. 6,
Following steps：
Step 1001, starts；
Controller proceeds by charge and discharge control；
Step 1002, detects the output current Ia of TRT；
The current value Ia of controller detection TRT output；
Whether step 1003, current value Ia reaches continuous firing state current level I1；
Controller judges whether the current value Ia of TRT output reaches the current value I1 of continuous firing state, if reached
To current value I1, step 1004 is performed, if not up to current value I1, perform step 1007；
Whether step 1004, battery is full state；
Controller judges whether battery is full state, if battery is full state, performs step 1006, if
Battery is underfill state, performs step 1005；
Step 1005, TRT is powered, continuous firing, and battery is charged；
Controller control is powered by TRT, and controller controls programmable DC by signal acquisition transmission flow
Power supply is in continuous firing state, while being charged to battery by controller control；
Step 1006, TRT is powered, continuous firing, and battery is charged；
Controller control is powered by TRT, and controller controls programmable DC by signal acquisition transmission flow
Power supply is in continuous firing state, and controller is released the electricity that TRT sends by dissipative cell；
Whether step 1007, battery output current value Ib reaches continuous firing state current level I1；
Controller judges whether the current value Ib of TRT output reaches the current value I1 of continuous firing state, if reached
To current value I1, step 1008 is performed, if not up to current value I1, perform step 1009；
Step 1008, electric power storage is powered, continuous firing, and battery is charged；
Controller control is powered by battery, and controller controls programmable DC electricity by signal acquisition transmission flow
Source is in continuous firing state, while being powered to battery by controller control control TRT；
Whether step 1009, current value Ia reaches continuous firing state current level I1；
Controller judges whether the current value Ia of TRT output meets the current value I2 of discontinuous operation state, if full
Sufficient current value I2, performs step 1010, if being unsatisfactory for current value I2, performs step 1011；
Step 1010, TRT is powered, discontinuous operation, and battery is charged；
Controller control is powered by TRT, and controller controls programmable DC by signal acquisition transmission flow
Power supply is in discontinuous operation state, and battery is charged by controller control TRT；
Whether step 1011, current value Ib reaches continuous firing state current level I2；
Controller judges whether the current value Ib of battery output meets the current value I2 of discontinuous operation state, if met
Current value I2, performs step 1012, if being unsatisfactory for current value I2, performs step 1013；
Step 1012, storage battery power supply, discontinuous operation charges to battery；
Controller control is powered by battery, and controller controls programmable DC electricity by signal acquisition transmission flow
Source is in discontinuous operation state, and battery is charged by controller control TRT；
Step 1013, cut-out battery output, is stopped；
Controller cuts off the output loop of battery, and controller controls whole detection means to be stopped.
As shown in fig. 7, the signal acquisition transmission flow of the lossless detection method based on electric field fingerprint method, including following step
Suddenly：
Step 2001, starts；
Controller proceeds by signal acquisition transmission work；
Step 2002, if perform continuous firing state：
Controller judges whether condition of power supply supports that programmable DC power supply keeps continuing work according to charge and discharge control flow
Make state, if supporting that programmable DC power supply keeps continuous firing state, perform step 2003, if not supporting programmable straight
Stream power supply keeps continuous firing state, performs step 2008；
Step 2003, sends continuous firing instruction；
Controller sends continuous firing and instructs to programmable DC power supply, and programmable DC power supply is according to programmable DC electricity
Source workflow carries out continuous firing；
Step 2004, gathers programmable DC electric power outputting current value；
Controller obtains the output current of programmable DC power supply by current collecting device；
Whether step 2005, current value meets setting value；
Controller judges whether the output current of programmable DC power supply exceedes current threshold, if it exceeds current threshold,
Step 2007 is performed, if not less than current threshold, performing step 2006；
In this signal acquisition transmission flow, current signal threshold value is set to 50A.
Step 2006, continuous collecting voltage signal simultaneously sends；
Controller is sent signal by wireless base station apparatus by the continuous collection voltages signal of voltage acquisition clamping；
Step 2007, alarm, sends alarm signal；
Controller is alarmed, and is sent alarm signal by wireless base station apparatus；
Step 2008, sends discontinuous operation instruction；
Controller sends discontinuous operation and instructs to programmable DC power supply, and programmable DC power supply is according to programmable DC electricity
Source workflow carries out discontinuous operation；
Step 2009, gathers programmable DC electric power outputting current value；
Controller obtains the output current of programmable DC power supply by current collecting device；
Whether step 2010, current value meets setting value；
Controller judges whether the output current of programmable DC power supply exceedes current threshold, if it exceeds current threshold,
Step 2007 is performed, if not less than current threshold, performing step 2011；
Step 2011, interim acquisition voltage signal simultaneously sends；
Controller is sent signal by wireless base station apparatus by voltage acquisition card interim acquisition voltage signal.
As shown in figure 8, the workflow of programmable DC power supply, comprises the following steps：
Step 3001, starts；
Programmable DC power supply is started working；
Step 3002, receives controller instruction；
Programmable DC power supply receives the operating state instruction that control sends；
Step 3003, if be continuous firing status command；
Whether what programmable DC power supply judged that controller sends is continuous firing instruction, if continuous firing is instructed,
Step 3004 is performed, step 3005 is otherwise performed；
Step 3004, into continuous firing state；
Programmable DC power supply to flutter catch electrode 4 provide follow current pumping signal；
Step 3005, into discontinuous operation state；
Programmable DC power supply to flutter catch electrode 4 provide intermittent current pumping signal.
The above, is only presently preferred embodiments of the present invention, is not the limitation for making other forms to the present invention, is appointed
What those skilled in the art changed possibly also with the technology contents of the disclosure above or be modified as equivalent variations etc.
Effect embodiment.But it is every without departing from technical solution of the present invention content, according to technical spirit of the invention to above example institute
Any simple modification, equivalent variations and the remodeling made, still fall within the protection domain of technical solution of the present invention.
Claims (9)
1. a kind of the cannot-harm-detection device based on electric field fingerprint method, including pipe under test（2）, it is characterised in that：In pipe under test
（2）On be uniformly arranged multiple and flutter and catch electrode（4）, electrode is caught in all flutterring（4）Two outer ends of region are respectively installed with one
For the electric current input block of input stimulus current signal, at the same be provided with one with electric current input block and flutter and catch electrode
（4）The control unit being respectively connected with, control unit include a controller and the power supply module that is controlled respectively by controller and
Signal acquisition module；
Described electric current input block is electrode sleeve（1）, electrode sleeve（1）Including a becket（6）And it is uniformly arranged on gold
Category ring（6）The multiple electrodes pole of outlet（7）, becket（6）It is provided with a closeable breach, becket（6）Lack
Mouth two ends are attached by bolt, make electrode sleeve（1）As a closed loop configuration, electrode terminal（7）With described control unit phase
Even.
2. the cannot-harm-detection device based on electric field fingerprint method according to claim 1, it is characterised in that：Described power supply mould
Block includes programmable DC power supply, battery and TRT, and TRT is connected with controller, and controller is mutual with battery
Even, controller is connected with programmable DC power supply, the output end of programmable DC power supply and described electrode terminal（7）It is connected.
3. the cannot-harm-detection device based on electric field fingerprint method according to claim 1, it is characterised in that：Described generating dress
Put including solar panel or/and wind-driven generator.
4. the cannot-harm-detection device based on electric field fingerprint method according to claim 2, it is characterised in that：Compiled in described
Journey dc source and electrode terminal（7）Between be provided with for gather programmable DC source current output valve current acquisition fill
Put, the output end of current collecting device is connected to the controller.
5. the cannot-harm-detection device based on electric field fingerprint method according to claim 1, it is characterised in that：Described signal is adopted
Collection module includes matrix switch, voltage acquisition card and the wireless communication module that the controller is connected simultaneously, matrix switch, voltage
Capture card and wireless communication module are sequentially connected, and electrode is caught in described flutterring（4）It is connected to matrix switch.
6. the detection side that a kind of the cannot-harm-detection device based on electric field fingerprint method using described in any one of claim 1 ~ 5 is realized
Method, it is characterised in that：The charge and discharge control flow of control is realized to the power supply module and to the signal including controller
Acquisition module realizes the signal acquisition transmission flow of control.
7. the lossless detection method based on electric field fingerprint method according to claim 6, it is characterised in that：Described discharge and recharge
Control flow, comprises the following steps：
Step 1001, starts；
Controller proceeds by charge and discharge control；
Step 1002, detects the output current Ia of TRT；
The current value Ia of controller detection TRT output；
Whether step 1003, current value Ia reaches continuous firing state current level I1；
Controller judges whether the current value Ia of TRT output reaches the current value I1 of continuous firing state, if reaching electricity
Flow valuve I1, performs step 1004, if not up to current value I1, performs step 1007；
Whether step 1004, battery is full state；
Controller judges whether battery is full state, if battery is full state, step 1006 is performed, if electric power storage
Pond is underfill state, performs step 1005；
Step 1005, TRT is powered, continuous firing, and battery is charged；
Controller control is powered by TRT, and controller controls programmable DC power supply by signal acquisition transmission flow
In continuous firing state, while being charged to battery by controller control；
Step 1006, TRT is powered, continuous firing, and battery is charged；
Controller control is powered by TRT, and controller controls programmable DC power supply by signal acquisition transmission flow
In continuous firing state, controller is released the electricity that TRT sends by dissipative cell；
Whether step 1007, battery output current value Ib reaches continuous firing state current level I1；
Controller judges whether the current value Ib of TRT output reaches the current value I1 of continuous firing state, if reaching electricity
Flow valuve I1, performs step 1008, if not up to current value I1, performs step 1009；
Step 1008, electric power storage is powered, continuous firing, and battery is charged；
Controller control is powered by battery, and controller is controlled at programmable DC power supply by signal acquisition transmission flow
In continuous firing state, while being powered to battery by controller control control TRT；
Whether step 1009, current value Ia reaches continuous firing state current level I1；
Controller judges whether the current value Ia of TRT output meets the current value I2 of discontinuous operation state, if meeting electricity
Flow valuve I2, performs step 1010, if being unsatisfactory for current value I2, performs step 1011；
Step 1010, TRT is powered, discontinuous operation, and battery is charged；
Controller control is powered by TRT, and controller controls programmable DC power supply by signal acquisition transmission flow
In discontinuous operation state, battery is charged by controller control TRT；
Whether step 1011, current value Ib reaches continuous firing state current level I2；
Controller judges whether the current value Ib of battery output meets the current value I2 of discontinuous operation state, if meeting electric current
Value I2, performs step 1012, if being unsatisfactory for current value I2, performs step 1013；
Step 1012, storage battery power supply, discontinuous operation charges to battery；
Controller control is powered by battery, and controller is controlled at programmable DC power supply by signal acquisition transmission flow
In discontinuous operation state, battery is charged by controller control TRT；
Step 1013, cut-out battery output, is stopped；
Controller cuts off the output loop of battery, and controller controls whole detection means to be stopped.
8. the lossless detection method based on electric field fingerprint method according to claim 6 or 7, it is characterised in that：Described letter
Number collection transmission flow, comprise the following steps：
Step 2001, starts；
Controller proceeds by signal acquisition transmission work；
Step 2002, if perform continuous firing state：
Controller judges whether condition of power supply supports that programmable DC power supply keeps continuous firing shape according to charge and discharge control flow
State, if supporting that programmable DC power supply keeps continuous firing state, performs step 2003, if not supporting programmable DC electricity
Source keeps continuous firing state, performs step 2008；
Step 2003, sends continuous firing instruction；
Controller sends continuous firing and instructs to programmable DC power supply, and programmable DC power supply is according to programmable DC power supply work
Continuous firing is carried out as flow；
Step 2004, gathers programmable DC electric power outputting current value；
Controller obtains the output current of programmable DC power supply by current collecting device；
Whether step 2005, current value meets setting value；
Controller judges whether the output current of programmable DC power supply exceedes current threshold, if it exceeds current threshold, performs
Step 2007, if not less than current threshold, performing step 2006；
Step 2006, continuous collecting voltage signal simultaneously sends；
Controller is sent signal by wireless base station apparatus by the continuous collection voltages signal of voltage acquisition clamping；
Step 2007, alarm, sends alarm signal；
Controller is alarmed, and is sent alarm signal by wireless base station apparatus；
Step 2008, sends discontinuous operation instruction；
Controller sends discontinuous operation and instructs to programmable DC power supply, and programmable DC power supply is according to programmable DC power supply work
Discontinuous operation is carried out as flow；
Step 2009, gathers programmable DC electric power outputting current value；
Controller obtains the output current of programmable DC power supply by current collecting device；
Whether step 2010, current value meets setting value；
Controller judges whether the output current of programmable DC power supply exceedes current threshold, if it exceeds current threshold, performs
Step 2007, if not less than current threshold, performing step 2011；
Step 2011, interim acquisition voltage signal simultaneously sends；
Controller is sent signal by wireless base station apparatus by voltage acquisition card interim acquisition voltage signal.
9. the lossless detection method based on electric field fingerprint method according to claim 8, it is characterised in that：Described is programmable
Dc source workflow, comprises the following steps：
Step 3001, starts；
Programmable DC power supply is started working；
Step 3002, receives controller instruction；
Programmable DC power supply receives the operating state instruction that control sends；
Step 3003, if be continuous firing status command；
Whether what programmable DC power supply judged that controller sends is continuous firing instruction, if continuous firing is instructed, is performed
Step 3004, otherwise performs step 3005；
Step 3004, into continuous firing state；
Programmable DC power supply catches electrode to flutterring（4）Follow current pumping signal is provided；
Step 3005, into discontinuous operation state；
Programmable DC power supply catches electrode to flutterring（4）Intermittent current pumping signal is provided.
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| CN105372322B (en) * | 2015-12-18 | 2016-08-24 | 中国石油大学(华东) | A kind of multi-direction current acquisition system being applied to electric field fingerprint method |
| CN105572211B (en) * | 2015-12-18 | 2018-02-13 | 中国石油大学(华东) | A kind of multi-direction current acquisition system applied to electric field fingerprint method pipe detection |
| CN105546354B (en) * | 2016-02-01 | 2017-12-22 | 中国石油化工股份有限公司 | A kind of device and method for reducing electric field fingerprint method test temperature error |
| CN107917865B (en) * | 2016-10-11 | 2020-01-31 | 中国石油化工股份有限公司 | compact sandstone reservoir multi-parameter permeability prediction method |
| CN108318570B (en) * | 2018-02-02 | 2020-05-22 | 中国石油大学(华东) | Hanging piece-based modular electric field fingerprint detection system and detection method |
| CN108756863A (en) * | 2018-04-18 | 2018-11-06 | 中国地质大学（武汉） | A method of improving electromagnetic measurement while drilling signal transmission distance using becket |
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