CN206015097U - A kind of detection means of cathodic protection test pile mesohigh direct current transportation interference - Google Patents

Abstract

A kind of detection means of cathodic protection test pile mesohigh direct current transportation interference, including：Processor, processor are electrically connected with analog-digital converter, and analog-digital converter is electrically connected with the first second-order low-pass filter circuit, the second second-order low-pass filter circuit, the 3rd second-order low-pass filter circuit respectively；First second-order low-pass filter circuit is electrically connected with the first protection circuit, and the first protection circuit connects the first polarization test piece, reference electrode respectively；Second second-order low-pass filter circuit is electrically connected with the second protection circuit, and the second protection circuit connects underground piping, reference electrode respectively；3rd second-order low-pass filter circuit is electrically connected with the 3rd protection circuit, and the 3rd protection circuit connects the second polarization test piece, reference electrode respectively；Processor is electrically connected with relay also by energy supply control module, and relay connects underground piping, the first polarization test piece respectively；Processor is also electrically connected with optical coupled switch module, pipeline, reference electrode under optical coupled switch module ground.

Description

A kind of detection means of cathodic protection test pile mesohigh direct current transportation interference

Technical field

The utility model is related to cathode protection technology, more particularly to one kind is used for detecting that cathodic protection test pile mesohigh is straight The device of stream transmission of electricity interference.

Background technology

Cathodic protection is the steel petroleum pipeline that protection is embedded in underground in the transport of petroleum and petrochemical sector oil product, effectively presses down The important means of system corrosion.In the corrosion accident of pipeline, as cathodic protection is not in place, cause underground piping corrosion occur and let out The situation of dew is very more.Once these pipelines, occur revealing, will result in serious security incident.In actual moving process, just True maintenance plays vital effect for the quality of protected effect, thus for monitoring the test pile of cathode protecting parameter Become requisite equipment in pipe-line maintenance.

At present, although detect that the cathode protecting parameter in pipeline is more universal using test pile, e.g., some in foreign country are public Department adopts cathodic protection wired monitoring, and data are incorporated to SCADA system (data acquisition analysis system) by which.Certainly, also adopt With part wireless remote monitering with detection cathodic protection system, but in these application systems, however it remains problems with：

HVDC transmission system mainly conveys electric energy over long distances by trolley line and submarine cable, in order to improve conveying Power and the operational efficiency of earthing pole, direct current transportation typically adopt bipolar line.System for HVDC System Earth Pole is to metal The main impact of pipe safety operation is corrosion.The powerful electric current that earthing pole is produced is by underground piping anticorrosive coat breakage or row After stream device enters underground piping, cathodic protection system will be sent to along underground piping, and cause the cathodic protection system can not be just Often run, or even cause potentiostat to damage.

Therefore, monitoring high-voltage dc transmission electrical interference is particularly important, and most of cathodic protection test piles are not at present There is corresponding supervising device.

Utility model content

For the problems referred to above, the purpose of this utility model：Aim to provide a kind of cathodic protection test pile mesohigh direct current defeated The detection means of electrical interference, can realize the monitor in real time disturbed by the direct current transportation of cathodic protection test pile mesohigh.

A kind of detection means of cathodic protection test pile mesohigh direct current transportation interference that the utility model is provided, including： Processor, the input of the processor are electrically connected with the output end of analog-digital converter, the analog-digital converter Input respectively with the first second-order low-pass filter circuit, the second second-order low-pass filter circuit, the 3rd second-order low-pass filter circuit Output end is electrically connected；The input of the first second-order low-pass filter circuit is electrically connected with the output end of the first protection circuit, institute The input for stating the first protection circuit connects the first polarization test piece, reference electrode respectively；The second second-order low-pass filter circuit Input is electrically connected with the output end of the second protection circuit, and the input of second protection circuit connects underground piping, ginseng respectively Compare electrode；The input of the 3rd second-order low-pass filter circuit is electrically connected with the output end of the 3rd protection circuit, and the described 3rd The input of protection circuit connects the second polarization test piece, reference electrode respectively；The first polarization test piece and underground piping electricity Connection, the second polarization test piece are arranged near the underground piping；The input of the processor is also by power supply Module is electrically connected with the output end of relay, and the input of the relay connects the underground piping, the first polarization test piece respectively； The input of the processor is also electrically connected with the output end of optical coupled switch module, the input termination institute of the optical coupled switch module State underground piping, reference electrode.

Further, the optical coupled switch module includes：Secondary filter circuit and optical coupled switch, the secondary filter circuit Input connects the underground piping, reference electrode respectively, and the output end of the secondary filter circuit is defeated with the optical coupled switch Enter end electrical connection, the output end of the optical coupled switch is electrically connected with the input of the processor.

Further, the energy supply control module includes：Lithium battery, the first power circuit, second source circuit, the first power supply Control circuit and second source control circuit, the output end of the lithium battery respectively with first power circuit, second source The input electrical connection of control circuit；The input of the output end of first power circuit and first power control circuit Electrical connection, the output end of the second source control circuit are electrically connected with the input of the second source circuit；Described first The output end of power circuit is also connected with the input of microprocessor electricity.

Further, the energy supply control module also includes：Reference voltage source, the input of the reference voltage source with described The output end electrical connection of second source circuit, the output end of the reference voltage source are defeated with the power supply of the analog-digital converter Enter end electrical connection.

Further, also include：Communication module, the communication module include GPS module, GPRS module, the GPS module, GPRS module is connected with the processor communication respectively.

Further, also include：Level shifting circuit, the RS232 communication interfaces in the GPRS module pass through the level Change-over circuit is connected with the processor communication.

Further, also include：Oscillating circuit and watchdog circuit, the oscillating circuit, watchdog circuit respectively with described Processor is electrically connected.

The detection means of this cathodic protection test pile mesohigh direct current transportation interference proposed according to above technical scheme, At least there is advantages below：

1., in the utility model, D.C. high voltage transmission interference signal is gathered by optical coupled switch module, works as underground piping In when there is D.C. high voltage transmission interference signal, processor can be waken up immediately, reliable HVDC in real time is provided for manager Transmission of electricity interference information, to remind whether manager needs the impact for producing high-voltage dc transmission electrical interference to take necessary measure, So as to reduce the harm of high-voltage dc transmission electrical interference.

2. in the utility model, by the logical of the connecting line between the polarization test piece of Control first and underground piping Disconnected, realize the measurement of switch-off potential exactly, effectively eliminate the interference of IR drops and stray electrical current, as calculating buried pipe The numerical value of pipe protection rate is accurate, error free；

3. in the utility model, by power control circuit control GPS module, GPRS module, analog-digital converter, And the break-make that powers in reference voltage source so that the intelligent monitoring utensil that the utility model is provided has automatic wake-up function, complete Into after measurement task automatically into resting state, electric energy is saved；Can use 3 years under normal circumstances.

Description of the drawings

Fig. 1 is the circuit theory of the detection means of cathodic protection test pile mesohigh direct current transportation interference in the utility model Block diagram；

Fig. 2 is the circuit diagram of processor in the utility model；

Fig. 3 is the circuit diagram of protection circuit in the utility model；

Fig. 4 is the circuit diagram of second-order low-pass filter circuit in the utility model；

Fig. 5 is the circuit diagram of optical coupled switch modular circuit in the utility model；

Fig. 6 is the circuit diagram of analog-digital converter circuit in the utility model；

Fig. 7 is the circuit diagram of the first power circuit in the utility model；

Fig. 8 is the circuit diagram of second source circuit in the utility model；

Fig. 9 is the circuit diagram of first and second power control circuit in the utility model；

Figure 10 is the circuit diagram of reference voltage source circuit in the utility model；

Figure 11 is the circuit diagram of level shifting circuit in the utility model；

Figure 12 is watchdog circuit figure in the utility model；

Circuit diagrams of the Figure 13 for the utility model repeat circuit.

In figure：

The 3rd protection circuits of 11- the first protection circuit the second protection circuits of 12- 13-

21- the first second-order low-pass filter circuit 22- the second second-order low-pass filter circuits

The 3rd second-order low-pass filter circuits of 23-

30- analog-digital converter 40- processor 51- secondary filter circuits

52- optical coupled switch 60- relay 71- lithium batteries

72- the first power circuit 73- second sources the first power control circuits of control circuit 74-

75- second source circuit 76- reference voltage source 81-GPS modules

82-GPRS module 91- watchdog circuit 92- oscillating circuits.

Specific embodiment

With reference to the accompanying drawings and detailed description the utility model is described in further detail：

In order to be illustrated more clearly that the utility model embodiment or technical scheme of the prior art, below in conjunction with the accompanying drawings and Embodiment is specifically described to the utility model.Drawings in the following description are only some enforcements of the present utility model Example.For those of ordinary skill in the art, on the premise of not paying creative work, can be being carried according to these accompanying drawings Go out the circuit structure accompanying drawing with equal function.

As shown in figure 1, a kind of detection means of cathodic protection test pile mesohigh direct current transportation interference, including processor 40th, the input of the processor 40 is electrically connected with the output end of analog-digital converter 30, the analog-digital converter 30 Input respectively with the first second-order low-pass filter circuit 21, the second second-order low-pass filter circuit 22, the 3rd second-order low-pass filter The output end electrical connection of circuit 23；The output of the input and the first protection circuit 11 of the first second-order low-pass filter circuit 21 End electrical connection, the input of first protection circuit 11 connect the first polarization test piece, reference electrode respectively；Second second order is low The input of bandpass filter circuit 22 is electrically connected with the output end of the second protection circuit 12, the input of second protection circuit 12 Underground piping, reference electrode are connect respectively；The input and the 3rd protection circuit 13 of the 3rd second-order low-pass filter circuit 23 Output end is electrically connected, and the input of the 3rd protection circuit 13 connects the second polarization test piece, reference electrode respectively；First pole Change test piece to electrically connect with the underground piping, the second polarization test piece is arranged near the underground piping；The processor 40 input is electrically connected with the output end of relay 60 also by energy supply control module, the input difference of the relay 60 Connect the underground piping, the first polarization test piece；Output end electricity of the input of the processor 40 also with 52 module of optical coupled switch Connection, the input of 52 module of the optical coupled switch terminate the underground piping, reference electrode.

Further, 52 module of the optical coupled switch includes：Secondary filter circuit 51 and optical coupled switch 52, the secondary filter The input of circuit 51 connects the underground piping, reference electrode, the output end of the secondary filter circuit 51 and the light respectively The input electrical connection of coupling switch 52, the output end of the optical coupled switch 52 are electrically connected with the input of the processor 40.

Further, the energy supply control module includes：Lithium battery 71, the first power circuit 72, second source circuit 75, One power control circuit 74 and second source control circuit 73, the output end of the lithium battery 71 are electric with first power supply respectively Road 72, the input electrical connection of second source control circuit；The output end of first power circuit 72 and first power supply The input electrical connection of control circuit 74, the output end of the second source control circuit 73 and the second source circuit 75 Input is electrically connected；The output end of first power circuit 72 is also connected with the input of 40 electricity of microprocessor.

Further, the energy supply control module also includes：Reference voltage source 76, the input of the reference voltage source 76 with The output end electrical connection of the second source circuit 75, the output end of the reference voltage source 76 and the analog-digital converter 30 power input electrical connection.

Further, also include：Communication module, the communication module include GPS module 81, GPRS module 82, the GPS moulds Block 81, GPRS module 82 are communicated to connect with the processor 40 respectively.

Further, also include：Level shifting circuit, the RS232 communication interfaces in the GPRS module 82 pass through the electricity Flat change-over circuit is communicated to connect with the processor 40.

Further, also include：Oscillating circuit 92 and watchdog circuit 91,91 points of the oscillating circuit 92, watchdog circuit Do not electrically connect with the processor 40.

In the utility model cathodic protection test pile include pile cover, marker peg, the detection means being placed in inside marker peg, Ground wire, polarized probe, detect the first polarization test piece, the second polarization test piece, the ginseng by the polarized probe Than electrode relative to the underground piping potential value.

Specifically, in the utility model, 4 aviation terminal connecting lines are extended in detection means, by marker peg side The circular hole in face is connected on the tie point of two tie points, reference electrode and underground pipings of polarized probe.Wherein, polarize Pop one's head in as annular, model ANKO-TC-CSE-III, there are two little circular concaves above, two concave surface difference are corresponding Two points connect the tie point of the first polarization test piece of data acquisition circuit and the second polarization test piece respectively, and data acquisition circuit is logical Piping connecting line is connected with the solder joint of underground piping；Reference electrode used in the utility model is permanent reference electrode, can To be embedded in Underground Long-term work, stable in properties.

As specific embodiment, in the utility model using model STM32L073RZT6 the ultralow work(of high-performance , used as processor 40, its circuit diagram is as shown in Fig. 2 need the power supply electricity of 3.3V during its normal mode of operation for 32 single-chip microcomputers of consumption Pressure, during standy operation mode power consumption be 0.43uA, power-down mode power consumption be 0.1uA, and the utility model select processor 40 3.5us is less than from holding state to wakeup time.

Certainly, the low power processor 40 of other models can also be selected in the utility model, for example：PIC、STM8L、 C8051 series low-power scm (such as STM8L101F2, PIC16C72, C8051F etc.), as long as which can realize the utility model Purpose, be intended to be included in the available processor 40 of the utility model.

Specifically, as shown in figure 3, for protection circuit figure in the utility model, first, second, third protection circuit is distinguished Including the first Zener diode D5, the second Zener diode DS1, resettable fuse F1, Transient Suppression Diode D6, common mode press down Inductance CL1 processed, the first electric capacity C15, the second electric capacity C12, the first divider resistance R23, and the second divider resistance R22, wherein, institute The negative electrode for stating the first Zener diode D5 is electrically connected with the positive input terminal of analog signal (A+ ends in diagram), first voltage stabilizing two The anode of pole pipe D5 is electrically connected with the negative input end at analog signal (REF ends in diagram)；The moon of the second Zener diode DS1 Pole is electrically connected with the negative electrode of the first Zener diode D5, and the anode of the second Zener diode DS1 is steady with described first The anode electrical connection of pressure diode D5；The first end of resettable fuse F1 is electric with the negative electrode of the second Zener diode DS1 Connection, the second end is connected with the negative electrode of Transient Suppression Diode D6, the anode of Transient Suppression Diode D6 and second voltage stabilizing The anode electrical connection of diode DS1, the first electric capacity C15 are connected in parallel on the two ends of Transient Suppression Diode D6；Common mode inhibition inductance CL1 First input end and the second input be connected with the negative electrode and anode of Transient Suppression Diode D6 respectively；Second electric capacity C12 is simultaneously Connection is connected to first output end and the second output end of common mode inhibition inductance CL1；First divider resistance R23 and the second divider resistance R22 is connected in series, and the first divider resistance R23 for being connected in series and the second divider resistance R22 are connected in the second electric capacity C12 in parallel Two ends, the voltage signal at the second divider resistance R22 two ends is used as the output through protective treatment.

Specifically, in actual applications, the analog signal of three road protection circuits (first, second, third protection circuit) Positive input terminal (the A+ ends in diagram) connects the second polarization test piece, underground piping, and the first polarization test piece, negative input end respectively (REF) reference electrode end is all connect.Further, in the utility model, model TRF250- of resettable fuse F1 120, model SMBJ15CA of Transient Suppression Diode D6, model GRM31BR72J102KW01L of the first electric capacity C15；The The capability value of two electric capacity C12 is 1000pF, and the voltage that two ends can be born is 630V；Common mode inhibition inductance CL1 for inductance value is The inductor of 4.7mH models 50475C, the resistance of the first divider resistance R23 is 499K, and the resistance of the second divider resistance R22 is 10K.In the utility model, input analog signal has sequentially passed through the first Zener diode, the second Zener diode, self- recoverage Fuse, enters after the pretreatment of Transient Suppression Diode and common mode inhibition inductance by the first divider resistance and the second partial pressure electricity In the bleeder circuit of resistance composition, signal is adjusted the scope that can be sampled to Analog-digital Converter module；The utility model is carried simultaneously For protection circuit cathodic protection test pile equipment can also be protected excessively electric from lightning surge, switching overvoltage, power frequency transient state Pressure is impacted and is damaged.There is various transient peak pulses and AC influence on underground piping, signal was passed through before sampling is entered Protection pretreatment and filtering process measure.The protection pretreatment circuit of this equipment suppresses two by PPTC resettable fuses, transient state Pole pipe, common mode inhibition inductance etc. are constituted, can effectively transient suppression pulse.

Further, low pass filter is Butterworth second-order low-pass filter or chebyshev low-pass filter.Specifically Ground, in the utility model, uses Butterworth second-order low-pass filter, for filtering the exchange in input analog signal Interference signal, its circuit diagram is as shown in figure 4, the input of second-order low-pass filter circuit and the second divider resistance in protection circuit Output connection.Certainly, the low pass filter of other kind of model, in the utility model, can also be used, as long as which can realize this reality With new purpose, it is included in content of the present utility model.

Further, 30 model AD7799 of analog-digital converter, it are 24 three-pass DINSAR simulation input sigma-delta types Digital to analog converter, as shown in fig. 6, the analog-digital converter 30 of this model is suitable for the low-power consumption of high-acruracy survey application, low Noise, full simulation front end, have been internally integrated low noise instrument amplifier in piece, thus can directly input small-signal, specifically, The minimum 27nV of root mean square noise, typical power consumption are 380 μ A.Specifically, in actual applications, second-order low-pass filter circuit is defeated Go out end to be connected with analog input end AIN1+ and AIN1- ends in diagram or AIN2+ and AIN2- ends or AIN3+ and AIN3- ends respectively； Output terminals A D-SCLK, AD-SIMO and AD-SOMI meet PA5, PA7, and PA6 in processor 40 respectively.Described simulation numeral turns Accurate bandgap voltage reference 76 of the parallel operation 30 using REF191 models, its high precision reach 2mv, temperature coefficient 5Pppm, power consumption It is less than 45 μ A.Specifically, when input analog signal is after protection circuit and second-order low-pass filter processing of circuit, simulation numeral Converter 30 is converted into data signal, finally will be processed in data signal input processor 40.

The output end of the analog-digital converter 30 is electrically connected with the input of digital isolator, the digital isolator Model ADuM130x three-channel digital isolator, the three-channel digital isolator is a kind of based on magnetic coupling isolation technology Universal three-channel digital isolator.The transformer technology of high-speed cmos technique and chip-scale is employed, in performance, power consumption, body The everyways such as product have the incomparable advantage of photoelectric isolating device.

Analog-digital converter 30 described in actual applications can also select ADS1296, ADS131E06 etc. 24 high Precision analog-digital converter is substituting.

Further, the secondary filter circuit 51 includes filter capacitor C3, filter capacitor C5, the filter capacitor C3's One end is connect with reference electrode electrical by resistance R5, and the other end of the filter capacitor C3 is electrically connected with underground piping；The filter One end of ripple electric capacity C5 is electrically connected with one end of the filter capacitor C3 by resistance R6, the other end of the filter capacitor C5 with The other end electrical connection of the filter capacitor C3.The input of the optical coupled switch 52 is electrically connected with the two ends of the filter capacitor C5 Connect, the output end of the optical coupled switch 52 is electrically connected with processor 40.

Further, optical coupled switch 52 of the optical coupled switch 52 using model CPC1008N.D.C. high voltage transmission is done Monitoring collection signal is disturbed after two stage filter, the input of optocoupler CPC1008N is entered, the output end of optocoupler connects single-chip microcomputer External interrupt, optocoupler conducting after high-voltage dc transmission electrical interference reaches certain numerical value, the output end of optocoupler produce interrupt signal and call out The single-chip microcomputer of awake dormancy.

Specifically, the first power circuit 72 (3.3V power circuits) includes the power circuit of model MAX884ESA, such as Shown in Fig. 7, the 7.4V supply voltages that lithium battery 71 is provided are converted to the supply voltage of 3.3V.75 (5V electricity of second source circuit Source circuit) include the power circuit of model WR2050S-1WR2, shown in Fig. 8,7.4V power supplys electricity that lithium battery 71 is provided Pressure is converted to the supply voltage of+5V, -5V.

Further, the first power control circuit 74 and second source control circuit 73 are using double N and P-channel MOSFET The control chip of model IRF7309 of composition, as shown in figure 9, can achieve GPS module 81, GPRS module 82, simulation numeral turn The break-make of parallel operation 30, reference voltage source 76 etc., specifically, when the larger chip of these power consumption is not needing power supply electric power thus supplied Under complete switch off, to reduce the purpose of power consumption.In actual applications, the port VCC_CTL in power control circuit with Port TXPC12/ATINCLK connections in processor 40.

Further, model G6S-2F-3V of relay 60, as shown in figure 13, for realizing underground piping and first Connecting line between polarization test piece is switched on and off.

Further, GPS module 81 is UBLOX or M8729GPS chips, or by III Big Dippeves of UM220- and GPS dual-mode chip Composition.Specifically, UBLOX high-precision GPS time service chips are adopted in the utility model, realized to along underground piping by satellite The positioning of the cathodic protection test pile of distribution and accurately time service, and the utility model adopt GPS time services chip its search star speed Degree is fast, and sensitivity is high, and time service precision is high, up to 10ns.Certainly, said chip is not limited in the utility model, can also select As long as which can realize the purpose of this utility model with the UM220-III Big Dippeves and GPS dual-mode chip etc., the utility model is included in Content in.

Used as specific embodiment of the present utility model, the cathodic protection test pile that the utility model is provided uses satellite (GPS, the Big Dipper) unifies time service, and for all cathodic protection test piles on a underground piping, carry out can simultaneously power-off, together When collection energization current potential, switch-off potential and natural potential, the potential data of each test pile when gathering power-off 0.05～0.3 second, and Above-mentioned data are uploaded to by GPRS chips, certainly, in the utility model, power-off acquisition time can be in cathodic protection intelligence Can monitoring system (for realizing the remote control to intelligent monitoring device) setting and modifying.

Further, GPRS module 82 is 3G GPRS DTU modules, and that realizes information is wirelessly transmitted to cathodic protection monitoring In the master server at center, including the reception of the upload and instruction of gathered data.The GPRS module 82 that the utility model is adopted, wide Power voltage supply, supports that data encryption protocol is supported in the connection automatically that goes offline, support call arousal function.Certainly, the utility model In, the module of other models, the such as WCDMA of GPRS/CDMA DTU, 3G, TD-SCDMA, EVDO, DTU module etc. is it is also possible to use, As long as which can realize the purpose of this utility model, it is included in content of the present utility model.

Further, electrical level transferring chip of the level shifting circuit using model MAX3232ESE, 3.3V are powered, and such as scheme Shown in 11, the Transistor-Transistor Logic level of microcontroller serial port is converted into RS232 level, the RS232 communication interfaces and monolithic in GPRS module 82 Machine carries out serial communication.

Further, the storage chip of model FM26LC64 of data memory module, is not shown.Specifically, Data can be stored temporarily in this memory when GPRS poor signals, treat that signal re-sends to long-range prison when good On control platform.

Further, watchdog circuit 91, further, model MCP1316-29 of watchdog circuit 91 is guarded the gate Dog chip, as shown in figure 12, the purpose of resetting processor 40 when can achieve to run into program fleet or voltage die, and can protect Processor 40 avoids the damage caused in the case of low pressure operation.Specifically, in actual applications, the voltage of watchdog chip Test side WDI connects the interface PB5 connections of processor 40.

Further, oscillating circuit 92, specifically, can be according to long distance control system time service, or 81 time service of GPS module.Tool Body, 81 time service of GPS module is on every time after electricity.Long distance control system time service is to continue more than one month in GPS no signals After time.

The check device specific work process of cathodic protection test pile mesohigh direct current output electrical interference is described as follows：First First, 52 module of optical coupled switch is produced as high-voltage dc transmission electrical interference reaches 52 module of optical coupled switch conducting after certain numerical value Trigger, wakes up the processor 40 of resting state.After processor 40 wakes up, i.e., GPRS moulds are given by energy supply control module Block 82, GPS module 81, protection circuit, second-order filter circuit, analog-digital converter 30 etc. are powered.Here, work as GPS module 81 and after GPRS module 82 is powered, two modules wait certain times, and such as 50 seconds stable to which, then 82 automatic connection of GPRS module To remote monitoring platform, GPS module 81 starts to search star until success.It should be noted that GPRS module 82 is put down with remote monitoring After platform successful connection, processor 40 receives the GPRS orders that remote monitoring platform sends.

Processor 40 disconnects the first polarization test piece and ground for being linked together by which always at ordinary times by normally closed relay 60 Lower pipeline, and start measurement after Preset Time, such as 100ms to the first polarization test piece and the measurement of reference electrode passage, measure After the completion of start measurement to underground piping signal and reference electrode passage at once, finally start second and polarize test piece and reference electricity The measurement of pole passage.The current potential of the relative reference electrode of the first polarization test piece for now measuring is switch-off potential, underground piping signal It is energization current potential with respect to the current potential of reference electrode, the current potential of the relative reference electrode of the second polarization test piece is natural potential.Measure Again the first polarization test piece and underground piping are linked together by normally closed relay 60 into after immediately.Then processor 40 from After analog-digital converter 30 is processed after reading measurement result, by GPRS module 82 by the data is activation for measuring to remote Range monitoring platform.Last processor 40 is broken to GPRS module 82, GPS module 81, data acquisition module by energy supply control module Electricity, and park mode is entered, wait wake-up next time, a workflow to terminate.

Further, the second polarization test piece and reference electrode connect the positive-negative input end of protection circuit, its signal respectively Output enters low pass filter, and signal enters 30 passage 1 of analog-digital converter after LPF, and signal is through simulation number Pass through the incoming processor 40 of I2C interfaces after word conversion.

Underground piping and reference electrode connect the positive-negative input end of protection circuit respectively, and its signal output enters LPF Device, signal enter 30 exchanger channel 2 of analog-digital converter after LPF, and signal passes through after Analog-digital Converter The incoming processor 40 of I2C interfaces.

First polarization test piece and reference electrode connect the positive-negative input end of protection circuit respectively, and its signal output enters low pass Wave filter, signal enter 30 exchanger channel 3 of analog-digital converter after LPF, and signal is after Analog-digital Converter By the incoming processor 40 of I2C interfaces.

Used as specific embodiment of the present utility model, the cathodic protection test pile on underground piping is arranged and detection dress Depending on the spacing that puts can be according to landform, the change of environment, in the complex environment of hypsography, set cathodic protection The setting distance of test pile and detection means can make a choice between 1～5 kilometer；And it is more serious in corrosion condition Pipeline section, the distance of the intelligent testing test pile for shortening the utility model offer that can be appropriate, using intensive setting.

As another embodiment of the present utility model, in order to extend the service life of lithium battery 71, in detection means In be provided with wake-up system, specifically, 52 electric circuit inspection of optical coupled switch is reached after certain numerical value to high-voltage dc transmission electrical interference, optocoupler 52 circuit turn-ons are switched, the processor 40 of dormancy is waken up；Less than after certain numerical value, optical coupled switch 52 is electric for high-voltage dc transmission electrical interference Road turns off, and processor 40 is automatically into resting state.

Above the specific embodiment of utility model is described in detail, but the utility model has been not restricted to above retouching The specific embodiment that states, which is intended only as example.To those skilled in the art, any the equivalent that the system is carried out is repaiied Change and substitute also all among category of the present utility model.Therefore, done under the spirit and scope without departing from utility model Impartial conversion and change, should all cover in the range of the utility model.

Claims (7)

1. the detection means that a kind of cathodic protection test pile mesohigh direct current transportation is disturbed, it is characterised in that include：Processor, The input of the processor is electrically connected with the output end of analog-digital converter, the input point of the analog-digital converter Not electric with the output end of the first second-order low-pass filter circuit, the second second-order low-pass filter circuit, the 3rd second-order low-pass filter circuit Connection；

The input of the first second-order low-pass filter circuit is electrically connected with the output end of the first protection circuit, first protection The input of circuit connects the first polarization test piece, reference electrode respectively；The input of the second second-order low-pass filter circuit and The output end electrical connection of two protection circuits, the input of second protection circuit connect underground piping, reference electrode respectively；Described The input of the 3rd second-order low-pass filter circuit is electrically connected with the output end of the 3rd protection circuit, the 3rd protection circuit defeated Enter end and connect the second polarization test piece, reference electrode respectively；The first polarization test piece is electrically connected with the underground piping, and described second Polarization test piece is arranged near the underground piping；

The input of the processor is electrically connected with the output end of relay also by energy supply control module, the relay defeated Enter end and connect the underground piping, the first polarization test piece respectively；Output of the input of the processor also with optical coupled switch module End electrical connection, the input of the optical coupled switch module terminate the underground piping, reference electrode.

2. the detection means that a kind of cathodic protection test pile mesohigh direct current transportation is disturbed as claimed in claim 1, its feature It is, the optical coupled switch module includes：Secondary filter circuit and optical coupled switch, the input difference of the secondary filter circuit The underground piping, reference electrode is connect, the output end of the secondary filter circuit is electrically connected with the input of the optical coupled switch, The output end of the optical coupled switch is electrically connected with the input of the processor.

3. the detection means that a kind of cathodic protection test pile mesohigh direct current transportation is disturbed as claimed in claim 1, its feature It is, the energy supply control module includes：Lithium battery, the first power circuit, second source circuit, the first power control circuit and Second source control circuit, the output end of the lithium battery respectively with first power circuit, second source control circuit Input is electrically connected；

The output end of first power circuit is electrically connected with the input of first power control circuit, the second source The output end of control circuit is electrically connected with the input of the second source circuit；The output end of first power circuit also with The input connection of microprocessor electricity.

4. the detection means that a kind of cathodic protection test pile mesohigh direct current transportation is disturbed as claimed in claim 3, its feature It is, the energy supply control module also includes：Reference voltage source, the input of the reference voltage source and second source electricity The output end electrical connection on road, the output end of the reference voltage source are electrically connected with the power input of the analog-digital converter Connect.

5. the inspection of a kind of cathodic protection test pile mesohigh direct current transportation interference as described in any one in Claims 1 to 4 Survey device, it is characterised in that also include：Communication module, the communication module include GPS module, GPRS module, the GPS moulds Block, GPRS module are connected with the processor communication respectively.

6. the detection means that a kind of cathodic protection test pile mesohigh direct current transportation is disturbed as claimed in claim 5, its feature It is, also includes：Level shifting circuit, the RS232 communication interfaces in the GPRS module by the level shifting circuit with The processor communication connection.

7. the inspection of a kind of cathodic protection test pile mesohigh direct current transportation interference as described in any one in Claims 1 to 4 Survey device, it is characterised in that also include：Oscillating circuit and watchdog circuit, the oscillating circuit, watchdog circuit respectively with institute State processor electrical connection.