CN202063999U - Cathode protection switch-off potential detection device of buried pipeline - Google Patents
Cathode protection switch-off potential detection device of buried pipeline Download PDFInfo
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- CN202063999U CN202063999U CN2011200692818U CN201120069281U CN202063999U CN 202063999 U CN202063999 U CN 202063999U CN 2011200692818 U CN2011200692818 U CN 2011200692818U CN 201120069281 U CN201120069281 U CN 201120069281U CN 202063999 U CN202063999 U CN 202063999U
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Abstract
The utility model relates to a cathode protection switch-off potential detection device of a buried pipeline, which comprises a probe and a tester. The tester is composed of a microprocessor, a key input, a voltage sampling, an operational amplifier circuit, an analog to digital (A/D) conversion circuit, a liquid crystal display, a clock, a memory, a bus and a power supply module. The voltage sampling connected with a probe reference electrode lead and a test piece lead is in output connection with the operational amplifier circuit which is in output connection with the A/D converter. The A/D converter is in output connection with the microprocessor input. The key input of the microprocessor is in input connection with the voltage sampling. The microprocessor is in output connection with the operational amplifier circuit and the A/D converter. The voltage sampling is further connected with the pipeline. The liquid crystal display and the memory are connected with the microprocessor through a single program initiation (SPI) bus. The clock is connected with the microprocessor through the I2C bus. The power supply is connected with the microprocessor, the key input, the voltage sampling, the operational amplifier circuit, the liquid crystal display, the clock and the memory. The cathode protection switch-off potential detection device of the buried pipeline is real, quick, high in precision, simple in operation, low in cost and convenient to install and maintain.
Description
Technical field
This utility model is a kind of buried pipeline galvanic protection switch-off potential proofing unit, relates to general corrosion protection, measurement electric variable and the tubing system technical field of metallic substance.
Background technology
Cathodic protection potential is the important criterion whether pipeline is subjected to the active cathodic protection.Measured current potential is a galvanic protection energising current potential in the line service.And according to criteria for cathodic protection among the GB21448, the criterion whether the judge pipeline is subjected to the active cathodic protection is the galvanic protection polarized potential of pipeline, i.e. switch-off potential.And the energising current potential is fallen by IR and switch-off potential is formed.Therefore, must remove IR in measuring process falls just and can obtain effective switch-off potential.
The retrieval of buried pipeline galvanic protection switch-off potential measuring method shows: measure buried pipeline galvanic protection switch-off potential and mainly contain two big methods, test piece outage method and GPS synchronizing current interrupt method.Test piece outage method is buried the ground test piece by what interrupt linking to each other with pipeline, measures and manually estimates and read the switch-off potential value, and human factor influences bigger to the result.GPS synchronizing current interruption method is by installing GPS synchronizing current interrupter at the potentiostat output terminal, can select volt ohm-milliammeter or supporting data acquisition unit that switch-off potential is measured, need the professional to operate, and current relevant device all needs import, cost is higher.
External existing many companies develop corresponding energising/switch-off potential measuring system.This type systematic is formed by following two portions basically: current interruptions device and supporting potential measurement instrument.When measuring energising/switch-off potential, at galvanic protection potentiostat output terminal the current interruptions device is installed earlier, with periodic interruption cathodic protection current, and then carry the potential measurement instrument by the special messenger and switch on/the switch-off potential measurement.
Chinese patent ZL 03119386.2 " pipe-to-soil potential of galvanic protection pipeline and surface potential method for comprehensive detection and device " discloses a kind of pipe-to-soil potential and surface potential method for comprehensive detection and device of galvanic protection pipeline.This method adopts at least the reference electrode of each detector tube ground potential and surface potential to measure simultaneously, and in measuring process, adopt instantaneous interruption electric current or extrinsic motivated current signal method to eliminate IR and fall, the test data that registering instrument is gathered is determined real pipe-to-soil potential and surface potential through microcomputer analysis.
ZL 200510114259.X " automatic collector for cathode protection potential data at microconsumption station " relates to a kind of automatic collector for cathode protection potential data at microconsumption station; cooperate GPS synchronizing current interrupter, can under little power consumption condition, carry out the automatic judgement and the detection of galvanic protection energising current potential, switch-off potential on the long distance pipeline.
There is following deficiency in actual use in above-mentioned measuring system based on the current interruptions device:
The first, when pipeline is subjected to stray current and disturbs, because of flowing of stray current is not subjected to the influence of current interruptions device, so the current potential that the records real polarized potential that not is pipeline;
The second, because aforesaid device is relatively more expensive, and measuring process is loaded down with trivial details, can only be measured by the personnel that were subjected to special training, and can not become the daily administration means;
The 3rd; can only carry out once electrification/switch-off potential for a pipeline every several years measures; the data of surveying only can pass judgment on and measure cathode during securing system running condition, and daily management can only be carried out with reference to data between detection period, is unfavorable for the cathodic protection system routine maintenance.
Current; China pipeline operation enterprise generally carried out once electrification/switch-off potential every several years to pipeline and measures; the anticathode securing system is carried out the switch-off potential evaluation, and determines cathodic protection system energising current potential operating parameter, safeguards with reference to the energising potential parameters in routine duties.
From management view; this management mode also exists following deficiency: because the operation of cathodic protection system is affected by the external environment bigger; utilize every several years and carry out the parameter anticathode securing system that one-shot measurement obtained and carry out daily administration, wherein inevitable some errors that also exist.If eliminate above-mentioned error, just should make energising/switch-off potential potential measurement become the routine maintenance means, and this just needs to be equipped with a large amount of energising/switch-off potential metering facilitys, and the routine work personnel are carried out professional training.And such scheme and costly and difficult execution.
From technical standpoint, existing energising/switch-off potential measuring system is when being subjected to the stray current interference, and measured potential data also will contain IR and fall composition, thereby can not represent the real polarized potential of pipeline.
" measurement technology " o. 11th (on December 31st, 2008) discloses the accurate measurement of a kind of " " auxiliary test piece method pipeline cathode protection current potential ", its core is a kind of high precision, reduce power consumption and eliminates the portable data acquisition module that influence falls in IR in the cathodic protection potential automatically.But this technology is also unsatisfactory to the tolerance range of control power on/off cycle, delay time and current potential sampling point at the stray current interference region, and unlike said.
The utility model content
The purpose of this utility model be a kind of true, quick, high precision of design, simple to operate, cost is lower, installation and maintenance buried pipeline galvanic protection easily switch-off potential proofing unit.
The utility model provides a kind of portable galvanic protection energising/switch-off potential self-operated measuring unit based on the test piece method that the pipeline daily administration is safeguarded that can be used for, and it carries out based on the proofing unit of design itself.This device still can be measured the effective polarization level of pipeline at the stray current interference region.
Pipeline cathode protection switch-off potential of the present utility model detects the portable galvanic protection energising/switch-off potential method for automatic measurement that is based on the test piece method, the lead-in wire of promptly taking over, probe reference electrode lead-in wire and three leads of probe test piece lead-in wire connect voltage sample, and the signal of voltage sample is added to tester; Voltage V1 when voltage sample probe test piece and pipeline UNICOM through operational amplifier, reaches microprocessor and carries out processing such as A/D conversion; By disconnecting probe test piece and pipeline by key control, tester is according to the power off periods and the delay time of setting in early stage, and the voltage V2 when voltage sample probe test piece and pipeline disconnect through operational amplifier, reaches microprocessor and carries out processing such as A/D conversion; Microprocessor obtains voltage data V1 and V2 from storer, V1 is the energising current potential under the pipeline immediate status, V2 is the switch-off potential under the pipeline immediate status, tester is according to the Different Results of different power off periods and delay time measurement, draw the current potential figure, and in liquid-crystal display, show, and store in the storer simultaneously.In the time of all surveying works, clock synchronization work.
With respect to traditional outage test piece method, this device can be controlled the power on/off cycle accurately, delay time and current potential sampling point (position of probe).
Automatically measure proofing unit based on the portable galvanic protection energising/switch-off potential of test piece method and mainly comprise probe and tester two portions.
The probe diagrammatic cross-section is seen shown in Figure 1, and schematic bottom view is seen shown in Figure 2.Main body is a cylinder ABS plastic bucket, being made up of test piece 6 and a Cu/CuS04 reference electrode, is that the lid 3 that copper/saturated copper sulphate solution 5, test piece outlet line 1, reference electrode outlet line 2 and being used for adds copper-bath is formed by test piece 6, semi-permeable membranes 7, fine copper rod 4, inside mainly.
Wherein the material of test piece 6 is chosen same material with underground pipeline, is generally the 16Mn steel; Test piece 6 usefulness Resins, epoxy are fixed on the probe bottom, and the semi-permeable membranes of reference electrode is positioned at the probe bottom center; The tie cable of supporting electrode and reference electrode outlet line 2 are all drawn from probe top by center probe, and spacing is about 1cm ± 2mm; According to the difference of pipeline coatings system status, the coating of supporting electrode surface-coated different sorts and different thickness.
Tester is formed by microprocessor, button input, voltage sample, discharge circuit, A/D change-over circuit, liquid-crystal display, clock, storer, bus with to the power module of each module for power supply, and functional block diagram as shown in Figure 3.The voltage sample output that connects probe reference electrode lead-in wire and test piece lead-in wire connects discharge circuit, and discharge circuit output connects the A/D change-over circuit, and the output of A/D change-over circuit connects the microprocessor input; The button input of microprocessor connects voltage sample, and the output of microprocessor also connects discharge circuit and A/D change-over circuit, and voltage sample also links to each other with pipeline; Liquid-crystal display, storer are connected with microprocessor by spi bus; Clock passes through I
2The C bus is connected with microprocessor; Power supply is connected with microprocessor, button input, voltage sample, discharge circuit, liquid-crystal display, clock, storer, is its power supply.
Three leads of voltage sample are connected with pipeline, probe reference electrode lead-in wire and probe test piece lead-in wire respectively, press the power button system power-up, import by button, probe test piece and pipe connection, voltage V1 when voltage sample probe test piece and pipeline UNICOM, through operational amplifier, reach microprocessor and carry out processing such as A/D conversion, and in storer, show in storage and the display screen.The button input disconnects probe test piece and pipeline, according to the power off periods and the delay time that are provided with, the voltage V2 when voltage sample probe test piece and pipeline UNICOM is through operational amplifier, reach microprocessor and carry out processing such as A/D conversion, and in storer, store and in liquid-crystal display.V1 is the energising current potential under the pipeline immediate status, and V2 is the switch-off potential under the pipeline immediate status, and tester is drawn the current potential figure, and shown in liquid-crystal display, and store in the storer simultaneously according to the Different Results of different power off periods and delay time measurement.In the time of all surveying works, clock synchronization work.With respect to traditional outage test piece method, these apparatus and method can be controlled the power on/off cycle accurately, delay time and current potential sampling point (position of probe).
Electric principle such as Fig. 4, Fig. 5, shown in Figure 6 of tester part are made up of microprocessor, simulating signal load module, power module three parts; The simulating signal load module is connected with microprocessor, and power module is connected with the simulating signal load module with microprocessor.Described simulating signal load module comprises voltage sample, discharge circuit and A/D change-over circuit.
The electric principle of microprocessor is made up of microprocessor, serial communication modular, liquid-crystal display, storer, clock as shown in Figure 4, is solidified with program in it; 23 pin of Flash storer AT45DB081B are connected with microprocessor P3.2 end, and 4 pin are connected with microprocessor P3.1 end, and 5 pin are connected with microprocessor P0.0, and 6 pin are connected with microprocessor P0.2, and 7 pin are connected with microprocessor P0.1; 5 pin of liquid-crystal display LMB018 and microprocessor P3.3,8 pin are connected with microprocessor P3.4, and 18 pin are connected with microprocessor P0.2 end, and 17 pin are connected with microprocessor P0.0; 1 pin of clock S3530A is connected with microprocessor P0.6, and 7 pin are connected with microprocessor P1.0, and 6 pin are connected with microprocessor P1.1; 13,15 pin of serial communication modular SP3223E connect 30,29 pin of microprocessor respectively.
The electric principle of simulating signal load module comprises 3 input signals as shown in Figure 5, and REF is a reference electrode, with the GND wire jumper link to each other; Test pin TEST_E connects the P1.2 pin of microprocessor, and pipeline pin PIPE_E connects the P1.3 pin of microprocessor.TEST_E and PIPE_E are microprocessor independence pin, except that carrying out the A/D conversion, also can be communicated with, and realize that the probe test piece links to each other with pipeline.Solid state relay J21 connects microprocessor P1.4 pin by individual pin CONNECT control.Voltage sampling signal inputs to 3 pin of chip U13, through amplifying, inserts the P1.5 pin of microprocessor by 6 pin of U17, and the button input is connected with microprocessor P2.2, P2.3, P2.4, P2.5, P2.6 and P2.7.
The electric principle of power module as shown in Figure 6, lithium cell is through J31 output 7.2-8.4V volts DS, is added to the input of U32 potentiostat ADP3303-5, U34 potentiostat ADP3303-3.3 respectively by Q 31 and Q32 output, its output is respectively+5V ,+3.3V; TLP421 manually controls the tester break-make by the photoelectricity decoupling device; Respectively to microprocessor and the power supply of simulating signal load module; By U33 voltage changer MAX660 to discharge circuit power supply-5V.
Microprocessor of the present utility model adopts RS-232 to communicate by letter with serial communication modular, microprocessor adopts spi bus to be connected with analog switch, A/D conversion, liquid-crystal display and storer, microprocessor adopts I 2C bus to be connected with clock, and microprocessor adopts lead to be connected with operational amplifier.
Wherein:
Microprocessor selects the C8051F310 series products; Serial communication modular selects the SP3223E series products; The LMB018 series products is selected in liquid-crystal display; Storer selects the AT45DB081B series products; Clock selects the S3530A series products; Operational amplifier selects the PVA3324 series products.
Each electrical element connects by Fig. 4, Fig. 5, Fig. 6, be connected with probe test piece, three leads of probe reference electrode and pipeline with lead according to voltage sample simultaneously, the startup instrument pushes button, voltage sample transfers to discharge circuit after gathering voltage signal V, through U17 chip 6 end input microprocessors, and in storer the storage and in liquid-crystal display, promptly get the current potential of switching on; Push button, probe test piece and pipe connection interrupt, microprocessor control voltage sample delay time, voltage sample transfers to discharge circuit after gathering voltage signal V1, through U17 chip 6 end input microprocessors, and in storer the storage and in liquid-crystal display, promptly get switch-off potential; After collecting certain numerical value, liquid crystal display data figure.
The utility model can be by probe; truly, quick and high-precision measuring channel galvanic protection switch-off potential; even if at the stray current interference region; still can measure the effective polarization level of pipeline; and compact construction, system cost is cheap, and is easy and simple to handle; help worker at the production line's use, can be used for the routine maintenance of cathodic protection system.
Description of drawings
Fig. 1 probe face sectional view
Fig. 2 bottom view of popping one's head in
Fig. 3 measures the principle of device block diagram of buried pipeline galvanic protection switch-off potential
Fig. 4 microprocessor electrical schematic diagram
Fig. 5 simulating signal load module electrical schematic diagram
Fig. 6 supplying unit electrical schematic diagram
1-test piece outlet line 2-reference electrode outlet line wherein
3-lid 4-fine copper rod
5-copper/saturated copper sulphate solution 6-test piece
The 7-semi-permeable membranes
Embodiment
Embodiment. this example is an experimental prototype.
This pipeline cathode protection switch-off potential detects the portable galvanic protection energising/switch-off potential method for automatic measurement that is based on the test piece method, the lead-in wire of promptly taking over, probe reference electrode lead-in wire and three leads of probe test piece lead-in wire connect voltage sample, and the signal of voltage sample is added to tester; Voltage V1 when voltage sample probe test piece and pipeline UNICOM through operational amplifier, reaches microprocessor and carries out processing such as A/D conversion; Disconnect probe test piece and pipeline, according to the power off periods and the delay time that are provided with, the voltage V2 when voltage sample probe test piece and pipeline UNICOM through operational amplifier, reaches microprocessor and carries out processing such as A/D conversion; V1 is the energising current potential under the pipeline immediate status, and V2 is the switch-off potential under the pipeline immediate status, and tester is drawn the current potential figure, and shown in liquid-crystal display, and store in the storer simultaneously according to the Different Results of different power off periods and delay time measurement.In the time of all surveying works, clock synchronization work.
Model machine comprises probe and tester two portions.The probe diagrammatic cross-section is seen shown in Figure 1, and schematic bottom view is seen shown in Figure 2.Main body is a cylinder ABS plastic bucket, being made up of test piece 6 and a Cu/CuS04 reference electrode, is that the lid 3 that copper/saturated copper sulphate solution 5, test piece outlet line 1, reference electrode outlet line 2 and being used for adds copper-bath is formed by test piece 6, semi-permeable membranes 7, fine copper rod 4, inside mainly.
Wherein the material of test piece 6 is chosen same material with underground pipeline, is generally the 16Mn steel; Test piece 6 usefulness Resins, epoxy are fixed on the probe bottom, and the semi-permeable membranes of reference electrode is positioned at the probe bottom center; The tie cable of supporting electrode and reference electrode outlet line 2 are all drawn from probe top by center probe, and spacing is about 1cm ± 2mm; According to the difference of pipeline coatings system status, the coating of supporting electrode surface-coated different sorts and different thickness.
Tester is formed by microprocessor, button input, voltage sample, discharge circuit, A/D change-over circuit, liquid-crystal display, clock, storer, bus with to the power module of each module for power supply, and functional block diagram as shown in Figure 3.The voltage sample output that connects probe reference electrode lead-in wire and test piece lead-in wire connects discharge circuit, and discharge circuit output connects the A/D change-over circuit, and the output of A/D change-over circuit connects the microprocessor input; The button input of microprocessor connects voltage sample, and the output of microprocessor also connects discharge circuit and A/D change-over circuit, and voltage sample also links to each other with pipeline; Liquid-crystal display, storer are connected with microprocessor by spi bus; Clock passes through I
2The C bus is connected with microprocessor; Power supply is connected with microprocessor, button input, voltage sample, discharge circuit, liquid-crystal display, clock, storer, is its power supply.
Probe body is the cylinder ABS plastic bucket of diameter 5cm, is made up of test piece 6 and a Cu/CuS04 reference electrode.The material of test piece 6 is chosen same material with underground pipeline, is the 16Mn steel.Test piece 6 usefulness Resins, epoxy are fixed on the probe bottom, and the semi-permeable membranes of reference electrode is positioned at the probe bottom center.The tie cable of supporting electrode and reference electrode outlet line 2 are all drawn from probe top by center probe, and spacing is 1cm.According to the difference of pipeline coatings system status, supporting electrode shows the coating that applies different sorts and different thickness.
Electric principle such as Fig. 4, Fig. 5, shown in Figure 6 of tester part are made up of microprocessor, simulating signal load module, power module three parts.
The electric principle of microprocessor is made up of microprocessor, serial communication modular, liquid-crystal display, storer, clock as shown in Figure 4, is solidified with program in it; 23 pin of Flash storer AT45DB081B are connected with microprocessor P3.2 end, and 4 pin are connected with microprocessor P3.1 end, and 5 pin are connected with microprocessor P0.0, and P3.1 is connected with microprocessor, and 6 pin are connected with microprocessor P0.2, and 7 pin are connected with microprocessor P0.1; 5 pin of liquid-crystal display LMB018 and microprocessor P3.3,8 pin are connected with microprocessor P3.4, and 18 pin are connected with microprocessor P0.2 end, and 17 pin are connected with microprocessor P0.0; 1 pin of clock S3530A is connected with microprocessor P0.6, and 7 pin are connected with microprocessor P1.0, and 6 pin are connected with microprocessor P1.1; 13,15 pin of serial communication modular SP3223E connect 30,29 pin of microprocessor respectively;
The electric principle of simulating signal load module comprises 3 input signals as shown in Figure 5, and REF is a reference electrode, with the GND wire jumper link to each other; Test pin TEST_E connects the P1.2 pin of microprocessor, and pipeline pin PIPE_E connects the P1.3 pin of microprocessor.TEST_E and PIPE_E are microprocessor independence pin, except that carrying out the A/D conversion, also can be communicated with, and realize that the probe test piece links to each other with pipeline.Solid state relay J21 connects microprocessor P1.4 pin by individual pin CONNECT control.Voltage sampling signal inputs to 3 pin of chip U13, through amplifying, inserts the P1.5 pin of microprocessor by 6 pin of U17, and the button input is connected with microprocessor P2.2, P2.3, P2.4, P2.5, P2.6 and P2.7;
The electric principle of power module as shown in Figure 6, lithium cell is through J31 output 7.2-8.4V volts DS, is added to the input of U32 potentiostat ADP3303-5, U34 potentiostat ADP3303-3.3 respectively by Q31 and Q32 output, its output is respectively+5V ,+3.3V; TLP421 manually controls the tester break-make by the photoelectricity decoupling device; Respectively to microprocessor and the power supply of simulating signal load module; By U33 voltage changer MAX660 to discharge circuit power supply-5V.
Microprocessor adopts RS-232 to communicate by letter with serial communication modular, and microprocessor adopts spi bus to be connected with analog switch, A/D conversion, liquid-crystal display and storer, and microprocessor and clock adopt I
2The C bus connects, and microprocessor adopts lead to be connected with operational amplifier.
Wherein:
Microprocessor selects C8051F310;
Serial communication modular selects SP3223E;
LMB018 is selected in liquid-crystal display;
Storer selects AT45DB081B;
Clock selects S3530A;
The U16 operational amplifier selects PVA3324;
Operational amplifier U13, U15, U18 select MAX406, and operational amplifier U17 selects AD602.
Each electrical element connects by Fig. 4, Fig. 5, Fig. 6, be connected with probe test piece, three leads of probe reference electrode and pipeline with lead according to voltage sample simultaneously, the startup instrument pushes button, voltage sample transfers to discharge circuit after gathering voltage signal V, through U17 chip 6 end input microprocessors, and in storer the storage and in liquid-crystal display, promptly get the current potential of switching on; Push button, probe test piece and pipe connection interrupt, microprocessor control voltage sample delay time, voltage sample transfers to discharge circuit after gathering voltage signal V1, through U17 chip 6 end input microprocessors, and in storer the storage and in liquid-crystal display, promptly get switch-off potential; After collecting certain numerical value, liquid crystal display data figure.
This example can be by containing the probe of test piece; truly, fast and accurately detect buried pipeline galvanic protection switch-off potential; and compact construction and operation control are easy; be a kind of practicality, reliable buried pipeline on-site parameters surveying instrument; need not to install GPS synchronizing current interrupter; need not professional's operation, can promote, be used for the routine maintenance of cathodic protection system the worker at the production line.
Claims (2)
1. a buried pipeline galvanic protection switch-off potential proofing unit comprises probe and tester two portions; Described probe body is a cylinder ABS plastic bucket, being made up of supporting electrode and a Cu/CuSO4 reference electrode, is that copper/saturated copper sulphate solution (5), test piece outlet line (1), reference electrode outlet line (2) and the lid (3) that is used for adding copper-bath are formed by test piece (6), semi-permeable membranes (7), fine copper rod (4), inside mainly; It is characterized in that tester forms by microprocessor, button input, voltage sample, discharge circuit, A/D change-over circuit, liquid-crystal display, clock, storer, bus with to the power module of each module for power supply; The voltage sample output that connects probe reference electrode lead-in wire and test piece lead-in wire connects discharge circuit, and discharge circuit output connects the A/D conversion, and A/D conversion output connects the microprocessor input; The button input of microprocessor connects voltage sample, and the output of microprocessor also connects discharge circuit and A/D conversion, and voltage sample also links to each other with pipeline; Liquid-crystal display, storer are connected with microprocessor by spi bus; Clock passes through I
2The C bus is connected with microprocessor; Power supply is connected with microprocessor, button input, voltage sample, discharge circuit, liquid-crystal display, clock, storer, is its power supply;
Three leads of voltage sample are connected with pipeline, probe reference electrode lead-in wire and probe test piece lead-in wire respectively, import by button, probe test piece (6) and pipe connection, energising current potential V1 when voltage sample probe test piece (6) and pipeline UNICOM, through operational amplifier, reach microprocessor and carry out the A/D conversion process, and in storer, store and display screen in show; The button input disconnects probe test piece (6) and pipeline, according to the power off periods and the delay time that are provided with, the switch-off potential V2 when voltage sample probe test piece (6) and pipeline UNICOM is through operational amplifier, reach microprocessor and carry out the A/D conversion process, and in storer, store and in liquid-crystal display; Tester is drawn the current potential figure, and is shown in liquid-crystal display, and store in the storer simultaneously according to the Different Results of different power off periods and delay time measurement; In the time of all surveying works, clock synchronization work.
2. a kind of buried pipeline galvanic protection switch-off potential proofing unit according to claim 1 is characterized in that electric former reason microprocessor, simulating signal load module, power module three parts of tester part are formed; The simulating signal load module is connected with microprocessor, and power module is connected with the simulating signal load module with microprocessor; Wherein the simulating signal load module comprises voltage sample, discharge circuit and A/D change-over circuit;
Described microprocessor is made up of microprocessor, serial communication modular, liquid-crystal display, storer, clock, is solidified with program in it; 23 pin of Flash storer AT45DB081B are connected with microprocessor P3.2 end, and 4 pin are connected with microprocessor P3.1 end, and 5 pin are connected with microprocessor P0.0, and 6 pin are connected with microprocessor P0.2, and 7 pin are connected with microprocessor P0.1; 5 pin of liquid-crystal display LMB018 and microprocessor P3.3,8 pin are connected with microprocessor P3.4, and 18 pin are connected with microprocessor P0.2 end, and 17 pin are connected with microprocessor P0.0; 1 pin of clock S3530A is connected with microprocessor P0.6, and 7 pin are connected with microprocessor P1.0, and 6 pin are connected with microprocessor P1.1; 13,15 pin of serial communication modular SP3223E connect 30,29 pin of microprocessor respectively;
Described simulating signal load module comprises 3 input signals, and REF is a reference electrode, with the GND wire jumper link to each other; Test pin TEST_E connects the P1.2 pin of microprocessor, pipeline pin PIPE_E connects the P1.3 pin of microprocessor, TEST_E and PIPE_E are microprocessor independence pin, except that carrying out the A/D conversion, also can be communicated with, realize that the probe test piece links to each other with pipeline, solid state relay J21 connects microprocessor P1.4 pin by individual pin CONNECT control.Voltage sampling signal inputs to 3 pin of chip U13, through amplifying, inserts the P1.5 pin of microprocessor by 6 pin of U17, and the button input is connected with microprocessor P2.2, P2.3, P2.4, P2.5, P2.6 and P2.7;
The electric principle of described power module is a lithium cell through J31 output 7.2-8.4V volts DS, is added to the input of U32 potentiostat ADP3303-5, U34 potentiostat ADP3303-3.3 respectively by Q31 and Q32 output, its output is respectively+5V ,+3.3V; TLP421 manually controls the tester break-make by the photoelectricity decoupling device; Respectively to microprocessor and the power supply of simulating signal load module; By U33 voltage changer MAX660 to discharge circuit power supply-5V.
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| CN2011200692818U CN202063999U (en) | 2011-03-16 | 2011-03-16 | Cathode protection switch-off potential detection device of buried pipeline |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102677068A (en) * | 2011-03-16 | 2012-09-19 | 中国石油天然气股份有限公司 | Power-off potential detecting device for cathode protection of buried pipeline |
| CN103422094A (en) * | 2012-05-15 | 2013-12-04 | 中国石油天然气股份有限公司 | Numerical simulation method for cathode-protection shallow-buried type anode ground bed grounding resistance |
| CN106835150A (en) * | 2017-03-07 | 2017-06-13 | 佛山市天然气高压管网有限公司 | A kind of cathodic protection system polarization potential measuring instrument and evaluation method |
-
2011
- 2011-03-16 CN CN2011200692818U patent/CN202063999U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102677068A (en) * | 2011-03-16 | 2012-09-19 | 中国石油天然气股份有限公司 | Power-off potential detecting device for cathode protection of buried pipeline |
| CN102677068B (en) * | 2011-03-16 | 2014-11-19 | 中国石油天然气股份有限公司 | Power-off potential detecting device for cathode protection of buried pipeline |
| CN103422094A (en) * | 2012-05-15 | 2013-12-04 | 中国石油天然气股份有限公司 | Numerical simulation method for cathode-protection shallow-buried type anode ground bed grounding resistance |
| CN106835150A (en) * | 2017-03-07 | 2017-06-13 | 佛山市天然气高压管网有限公司 | A kind of cathodic protection system polarization potential measuring instrument and evaluation method |
| CN106835150B (en) * | 2017-03-07 | 2019-04-05 | 佛山市天然气高压管网有限公司 | A kind of cathodic protection system polarization potential measuring instrument and evaluation method |
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