CN107727703A - Atmospheric corrosion monitoring system and monitoring method thereof - Google Patents
Atmospheric corrosion monitoring system and monitoring method thereof Download PDFInfo
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Abstract
The invention discloses an atmospheric corrosion monitoring system and a monitoring method thereof, relates to the technical field of atmospheric corrosion monitoring, and is used for improving the sampling accuracy of atmospheric corrosion data. The atmospheric corrosion monitoring system comprises an electrochemical probe for obtaining atmospheric corrosion current, a current sensor for converting the atmospheric corrosion current into a digital voltage signal, and a data processing unit for receiving and processing the digital voltage signal; the current sensor comprises a multi-gear sampling resistance module connected with the electrochemical probe, and a signal operational amplifier conditioning circuit and an analog-to-digital conversion circuit which are sequentially connected with the multi-gear sampling resistance module in series; and the data processing unit is connected with the output end of the analog-to-digital conversion circuit. The atmospheric corrosion monitoring system and the monitoring method thereof provided by the invention are used for monitoring atmospheric corrosion in the installation and operation environment of the power transmission line.
Description
Technical Field
The invention relates to the technical field of atmospheric corrosion monitoring, in particular to an atmospheric corrosion monitoring system and a monitoring method thereof.
Background
The transmission line is one of important components of a long-distance large-capacity transmission network, and comprises a lead and a large number of metal components such as transmission towers for hanging insulators and leads. When the power transmission line is exposed in a natural environment for a long time, atmospheric corrosion easily occurs to each metal component in the power transmission line, so that the insulation performance of the power transmission line is reduced, the mechanical strength is reduced, and a plurality of adverse effects are brought to the normal operation of a power grid. Therefore, the protection of each metal component which is likely to generate atmospheric corrosion in the power transmission line is a necessary measure for inhibiting or weakening the atmospheric corrosion, and the knowledge of the atmospheric corrosion data is necessary preparation for effectively making the protection measure.
At present, an atmospheric corrosion monitor is often adopted to monitor the atmospheric corrosion condition in the installation and operation environment of the power transmission line so as to obtain atmospheric corrosion data in the installation and operation environment of the power transmission line. However, when the existing atmospheric corrosion monitor samples atmospheric corrosion current, the range of the atmospheric corrosion monitor is limited, and the measurement precision of the atmospheric corrosion monitor is low, so that the atmospheric corrosion monitor is difficult to meet the monitoring requirements of various different installation and operation environments of a power transmission line on atmospheric corrosion, and the atmospheric corrosion monitor is difficult to perform high-precision sampling on the atmospheric corrosion current, and the existing atmospheric corrosion monitor is difficult to effectively formulate atmospheric corrosion protection measures to provide accurate atmospheric corrosion data.
Disclosure of Invention
The invention aims to provide an atmospheric corrosion monitoring system and a monitoring method thereof, which are used for improving the sampling accuracy of atmospheric corrosion data.
In order to achieve the above purpose, the invention provides the following technical scheme:
an atmospheric corrosion monitoring system comprises an electrochemical probe for obtaining atmospheric corrosion current, a current sensor for converting the atmospheric corrosion current into a digital voltage signal, and a data processing unit for receiving and processing the digital voltage signal; wherein,
the current sensor comprises a multi-gear sampling resistance module connected with the electrochemical probe, and a signal operational amplifier conditioning circuit and an analog-to-digital conversion circuit which are sequentially connected with the multi-gear sampling resistance module in series;
the data processing unit is connected with the output end of the analog-to-digital conversion circuit.
Compared with the prior art, the atmospheric corrosion monitoring system provided by the invention has the following beneficial effects:
according to the atmospheric corrosion monitoring system provided by the invention, after the atmospheric corrosion current is obtained by using the electrochemical probe, the atmospheric corrosion current can be amplified and converted into a digital voltage signal by using the current sensor, the converted digital voltage signal is output to the data processing unit, and then the received digital voltage signal is subjected to data processing by the data processing unit, so that the atmospheric corrosion data to be monitored can be obtained. Because current sensor is established ties in proper order by many gears sampling resistance module, signal fortune and is put conditioning circuit and analog-to-digital conversion circuit and constitute, and utilize many gears sampling resistance module not only can carry out the adjustment sampling of different gears to the atmosphere corrosion situation in the transmission line installation operational environment, effectively enlarge atmosphere corrosion monitoring system's range scope, can also be directed against the different installation operational environment of transmission line, rationally select the monitoring gear that is suitable for, so that improve atmosphere corrosion monitoring system's sampling accuracy, thereby provide accurate atmosphere corrosion data for the effective formulation of atmosphere corrosion safeguard measure.
In addition, the atmospheric corrosion monitoring system provided by the invention can perform noise reduction operational amplification and analog-to-digital conversion on atmospheric corrosion data sampled by the multi-gear sampling resistance module by using the signal operational amplifier conditioning circuit and the analog-to-digital conversion circuit in the current sensor, so that the processed atmospheric corrosion data can be stably and effectively output, and the monitoring reliability of the atmospheric corrosion monitoring system is improved.
The invention also provides an atmospheric corrosion monitoring method, which is used for implementing the atmospheric corrosion monitoring system with the multi-gear sampling resistance module as a three-gear resistance module. The atmospheric corrosion monitoring method comprises the following steps:
step 1, initializing an atmospheric corrosion monitoring system;
step 2, closing the first transistor, opening the second transistor, outputting a second sampling voltage obtained by connecting the third sampling resistor and the second sampling resistor in series to a data processing unit through the signal operational amplifier conditioning circuit and the analog-to-digital conversion circuit, and obtaining a first monitoring current of atmospheric corrosion by the data processing unit according to the second sampling voltage;
step 3, judging the magnitude of the first monitoring current value of atmospheric corrosion and the maximum value of the first preset current of atmospheric corrosion, and judging the magnitude of the first monitoring current value of atmospheric corrosion and the minimum value of the first preset current of atmospheric corrosion;
if the first monitoring current value of atmospheric corrosion is larger than the first preset current maximum value of atmospheric corrosion, turning to the step 4;
if the first monitoring current value of atmospheric corrosion is smaller than the first preset current minimum value of atmospheric corrosion, turning to step 6;
if the first monitoring current value of atmospheric corrosion is greater than or equal to the first preset current minimum value of atmospheric corrosion, and the first monitoring current value of atmospheric corrosion is less than or equal to the first preset current maximum value of atmospheric corrosion, then the step 8 is carried out;
step 4, closing the first transistor and the second transistor, outputting a third sampling voltage of the third sampling resistor to the data processing unit through the signal operational amplifier conditioning circuit and the analog-to-digital conversion circuit, and obtaining a second atmospheric corrosion monitoring current by the data processing unit according to the third sampling voltage;
step 5, judging the magnitude of a second monitoring current value of atmospheric corrosion and a second preset current value of atmospheric corrosion;
if the second monitoring current value of the atmospheric corrosion is smaller than the second preset current value of the atmospheric corrosion, returning to the step 2;
if the second monitoring current value of the atmospheric corrosion is larger than or equal to the second preset current value of the atmospheric corrosion, turning to step 8;
step 6, disconnecting the first transistor and the second transistor, outputting a first sampling voltage obtained by sequentially connecting the third sampling resistor, the second sampling resistor and the first sampling resistor in series to a data processing unit through the signal operational amplifier conditioning circuit and the analog-to-digital conversion circuit, and obtaining a third monitoring current of atmospheric corrosion by the data processing unit according to the first sampling voltage;
step 7, judging the magnitude of a third monitoring current value of atmospheric corrosion and a third preset current value of atmospheric corrosion;
if the third monitoring current value of the atmospheric corrosion is larger than the third preset current value of the atmospheric corrosion, returning to the step 2;
if the third monitoring current value of the atmospheric corrosion is less than or equal to the third preset current value of the atmospheric corrosion, turning to step 8;
step 8, the data processing unit stores the first monitoring current value of atmospheric corrosion, the second monitoring current value of atmospheric corrosion and/or the third monitoring current value of atmospheric corrosion to a data storage module; or
And the data processing unit transmits the first monitoring current value of atmospheric corrosion, the second monitoring current value of atmospheric corrosion and/or the third monitoring current value of atmospheric corrosion to a remote data management center.
Compared with the prior art, the beneficial effects which can be realized by the atmospheric corrosion monitoring method provided by the invention are the same as the beneficial effects which can be realized by the atmospheric corrosion monitoring system provided by the technical scheme, and are not repeated herein.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of an atmospheric corrosion monitoring system according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an electrochemical probe provided in an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a current sensor according to an embodiment of the present invention;
fig. 4 is a flowchart of an atmospheric corrosion monitoring method according to an embodiment of the present invention.
Reference numerals:
10-electrochemical probe, 20-current sensor,
30-a data processing unit, 40-a temperature and humidity acquisition module,
50-photovoltaic power module, 1-printed circuit board,
2-corrosion metal test piece, 3-insulating glue,
4-a carrying container, 5-an electrode lead,
21-a three-gear sampling resistance module, 22-a signal operational amplifier conditioning circuit,
23-analog-to-digital conversion circuit.
Detailed Description
For the convenience of understanding, the atmospheric corrosion monitoring system and the monitoring method thereof provided by the embodiment of the invention are described in detail below with reference to the attached drawings of the specification.
Referring to fig. 1, the atmospheric corrosion monitoring system provided in the embodiment of the present invention includes an electrochemical probe 10 for obtaining an atmospheric corrosion current, a current sensor 20 for converting the atmospheric corrosion current into a digital voltage signal, and a data processing unit 30 for receiving and processing the digital voltage signal; wherein,
the current sensor 20 comprises a multi-gear sampling resistance module connected with the electrochemical probe 10, and a signal operational amplifier conditioning circuit 22 and an analog-to-digital conversion circuit 23 which are sequentially connected with the multi-gear sampling resistance module in series;
the data processing unit 30 is connected to an output of the analog-to-digital conversion circuit 23.
After the atmospheric corrosion monitoring system provided in the above embodiment obtains the atmospheric corrosion current by using the electrochemical probe 10, the atmospheric corrosion current can be amplified and converted into a digital voltage signal by using the current sensor 20, the converted digital voltage signal is output to the data processing unit 30, and then the data processing unit 30 performs data processing on the received digital voltage signal, so as to obtain the atmospheric corrosion data to be monitored.
In the atmospheric corrosion monitoring system provided by the embodiment of the invention, the current sensor 20 can be a microampere current sensor formed by sequentially connecting a multi-gear sampling resistance module, a signal operational amplifier conditioning circuit 22 and an analog-to-digital conversion circuit 23 in series, so that the multi-gear sampling resistance module in the microampere current sensor can convert microampere atmospheric corrosion current signals obtained by the electrochemical probe 10 into millivolt analog voltage signals; the signal operational amplifier conditioning circuit 22 can linearly amplify the analog voltage signal by 10 times to 1000 times; the analog-to-digital conversion circuit 23 can convert the amplified analog voltage signal into a digital voltage signal. The atmospheric corrosion monitoring system provided by the embodiment of the invention utilizes the multi-gear sampling resistor module 21, can adjust and sample the atmospheric corrosion condition in the installation and operation environment of the power transmission line at different gears, effectively enlarges the range of the atmospheric corrosion monitoring system, and can reasonably select the applicable monitoring gear according to the different installation and operation environments of the power transmission line, so as to improve the sampling accuracy of the atmospheric corrosion monitoring system, thereby providing accurate atmospheric corrosion data for the effective formulation of atmospheric corrosion protection measures.
In addition, the atmospheric corrosion monitoring system provided by the embodiment of the invention utilizes the signal operational amplifier conditioning circuit 22 and the analog-to-digital conversion circuit 23 in the current sensor 20, and can also perform noise reduction operational amplifier and analog-to-digital conversion on the atmospheric corrosion data sampled by the multi-gear sampling resistor module, so that the processed atmospheric corrosion data can be stably and effectively output, and the monitoring reliability of the atmospheric corrosion monitoring system can be improved.
In summary, the atmospheric corrosion monitoring system provided by the embodiment of the invention can quantitatively evaluate the atmospheric corrosion conditions of the power transmission line in different installation and operation environments according to the obtained atmospheric corrosion data after monitoring the atmospheric corrosion conditions of the power transmission line in different installation and operation environments, thereby providing an accurate and powerful atmospheric corrosion data basis for effectively making atmospheric corrosion protection measures.
For example, referring to fig. 3, the multi-gear sampling resistor module provided in the above embodiment is a third gearA bit sampling resistor module 21, wherein the three-gear sampling resistor module 21 comprises first sampling resistors r connected in series in sequence from high to low in resistance value1A second sampling resistor r2And a third sampling resistor r3(ii) a Wherein,
a first sampling resistor r1Parallel first transistor Q1And a first sampling resistor r1Is connected with the positive lead of the electrochemical probe 10; second sampling resistor r2Parallel second transistor Q2(ii) a Third sampling resistor r3Connected with the negative lead of the electrochemical probe 10;
third sampling resistor r3A third sampling voltage, a third sampling resistor r3And a second sampling resistor r2A second sampling voltage after series connection, and a third sampling resistor r3A second sampling resistor r2And a first sampling resistor r1The first sampling voltages after serial connection are respectively connected to the signal operational amplifier conditioning circuit 22.
It is added that the first sampling resistor r1A second sampling resistor r2And a third sampling resistor r3Are all precision sampling resistors, the first transistor Q1And a second transistor Q2Are low resistance pass transistors.
Referring to fig. 2, the electrochemical probe provided in the above embodiment is used for obtaining atmospheric corrosion current, and includes a carrying container 4 disposed in an installation and operation environment of a power transmission line, and a corrosion metal test piece 2 and a printed circuit board 1 are sequentially stacked in the carrying container 4; the printed circuit board 1 includes: an insulating substrate arranged on the surface of the corrosion metal test piece 2, a gold immersion layer arranged on the surface of the insulating substrate opposite to the corrosion metal test piece, and a plurality of parallel grooves penetrating through the gold immersion layer and the insulating substrate; wherein,
the gold-depositing layer passes through the anode lead and the first sampling resistor r1The corrosion metal test piece 2 is connected with a third sampling resistor r through a negative lead3Connecting;
the surface to be corroded of the corrosion metal test piece 2 exposed in the parallel grooves is contacted with air, and the surface to be sealed of the corrosion metal test piece 2 exposed outside the periphery of the insulating substrate is covered by the insulating glue 3.
The electrochemical probe in the embodiment is composed of the corrosion metal test piece 2 and the printed circuit board 1 which are overlapped in the bearing container 4, has a simple structure, is easy to manufacture, and can improve the specification consistency of the electrochemical probe, thereby improving the parallelism and the repeatability of the electrochemical probe. The immersion gold layer of the printed circuit board 1 is insulated and isolated from the corrosion metal test piece 2 through an insulating substrate, a plurality of parallel grooves are arranged on the immersion gold layer and the insulating substrate in a penetrating way, the surface to be corroded of the corrosion metal test piece is exposed in the parallel grooves and is contacted with air, and the surface to be sealed of the corrosion metal test piece 2 exposed outside the insulating substrate is covered and insulated by insulating glue 3; at this time, if the electrochemical probe is placed in a humid atmosphere, a thin liquid film will appear at the inner edge of the parallel groove, so that the gold-depositing layer, the thin liquid film and the corrosion metal test piece 2 form a corrosion galvanic cell, and atmospheric corrosion occurs to the corrosion metal test piece 2.
Because the gold-depositing layer passes through the anode lead and the first sampling resistor r1The corrosion metal test piece 2 is connected with a third sampling resistor r through a negative lead3And the positive electrode lead and the negative electrode lead thereof may be collectively referred to as an electrode lead 5; when the corrosion metal test piece 2 is subjected to atmospheric corrosion, the corrosion current formed between the corrosion metal test piece 2 and the immersion gold layer can be output to the three-gear sampling resistance module 21 by using the current lead 5, namely, the atmospheric corrosion rate of the corrosion metal test piece 2 is converted into a current change signal and fed back to be output to the three-gear sampling resistance module 21, so that the effective sampling and online monitoring of the atmospheric corrosion condition of the environment where the electrochemical probe is positioned by the three-gear sampling resistance module 21 are realized, and the anticorrosive measures are taken on the power transmission line according to local conditions and timely and reasonably.
In order to further improve the sampling accuracy of the atmospheric corrosion monitoring system, the signal operational amplifier conditioning circuit 22 in the above embodiment preferably uses a low-temperature drift low-noise operational amplifier conditioning circuit, so that by using the characteristics of low temperature drift and low noise, the interference of the signal operational amplifier conditioning circuit 22 on the operational amplifier of the sampling signal of the three-level sampling resistor module 21 can be reduced, thereby improving the accuracy of the weak signal after operational amplification, so as to further improve the sampling accuracy of the atmospheric corrosion monitoring system. Further, the analog-to-digital conversion circuit 23 mentioned in the above embodiment is preferably a high-precision analog-to-digital conversion circuit. It can be understood that, in the embodiments of the present invention, the structures of the low-temperature-drift low-noise operational amplifier conditioning circuit and the high-precision analog-to-digital conversion circuit are not specifically limited, so that the structures can meet the use requirements.
Please refer to fig. 1, the atmospheric corrosion monitoring system provided in the foregoing embodiment further includes a temperature and humidity acquisition module 40 for acquiring a digital temperature signal and a digital humidity signal in an installation and operation environment of the power transmission line; the data processing unit 30 is also connected to the output of the humidity and temperature acquisition module 40. The temperature and humidity acquisition module 40 converts the temperature and humidity into a digital temperature signal and a digital humidity signal after acquiring the temperature and humidity in the installation and operation environment of the power transmission line, and outputs the digital temperature signal and the digital humidity signal to the data processing unit 30, and can provide reference for the digital voltage signal in the same environment by using the digital temperature signal and the digital humidity signal so as to obtain more accurate atmospheric corrosion data. For example, the humidity collected by the temperature and humidity collecting module 40 may be relative humidity.
Because the distribution area of the power transmission line is wide and is located outdoors, when the atmospheric corrosion monitoring system is used for remote online monitoring, the work power supply of each component in the atmospheric corrosion monitoring system is difficult, so please continue to refer to fig. 1, in the embodiment, the photovoltaic power supply module 50 respectively connected with the current sensor 20, the humidity temperature acquisition module 40 and the data processing unit 30 is arranged in the atmospheric corrosion monitoring system, so that the solar energy can be utilized to perform self-generation, and the use of the atmospheric corrosion monitoring system outdoors is greatly facilitated. The photovoltaic power module 50 generally includes a photovoltaic cell panel, a storage battery and a voltage converter connected in series in sequence; the voltage converter may convert the voltage of the storage battery according to respective working voltage requirements of the current sensor 20, the humidity and temperature acquisition module 40, and the data processing unit 30, so as to provide working voltages for the current sensor 20, the humidity and temperature acquisition module 40, and the data processing unit 30, respectively.
It can be understood that the data processing unit provided in the above embodiments is used for processing each digital signal, and the data processing unit may include a central processing module, and a data storage module, a time stamp module and a communication module respectively connected to the central processing module by signals; wherein,
the data storage module is also respectively connected with the output end of the analog-to-digital conversion circuit and the output end of the humidity and temperature acquisition module, and is used for storing a digital voltage signal, a digital temperature signal and a digital humidity signal according to a storage instruction of the central processing module; the data storage module can be one of memory storage devices such as a storage disk and a storage hard disk;
the time marking module is also connected with the data storage module and is used for marking corresponding monitoring moments to the digital voltage signal, the digital temperature signal and the digital humidity signal stored in the data storage module according to the marking instruction of the central processing module;
the communication module is respectively connected with the data storage module and the remote control center, and is used for transmitting a control instruction of the remote control center to the central processing module and transmitting the digital voltage signal, the digital temperature signal and the digital humidity signal stored by the data storage module to the remote data management center of the remote control center according to the transmission instruction of the central processing module; the remote data management center of the remote control center can be a database with data analysis and processing functions, a mainframe computer and the like.
Referring to fig. 4 and fig. 3, an atmospheric corrosion monitoring method is further provided in an embodiment of the present invention, and is applied to an atmospheric corrosion monitoring system in which the multi-level sampling resistor module provided in the above embodiment is a three-level resistor module. The atmospheric corrosion monitoring method comprises the following steps:
step S1, initializing an atmospheric corrosion monitoring system;
step S2, closing the first transistor Q1Turning off the second transistor Q2A third sampling resistor r3And a second sampling resistor r2The second sampling voltage after series connection is output to the data processing unit through the signal operational amplifier conditioning circuit and the analog-to-digital conversion circuit, and the data processing unit obtains a first atmospheric corrosion monitoring current value i according to the second sampling voltage1；
Specifically, the data processing unit divides the second sampling voltage by the third sampling resistor r3And a second sampling resistor r2The first monitoring current value i of atmospheric corrosion can be obtained by the sum of the resistance values1。
Step S3, determining a first monitoring current value i of atmospheric corrosion1First preset current maximum value I with atmospheric corrosion1MAXAnd determining a first monitored current value i of atmospheric corrosion1First predetermined current minimum value I associated with atmospheric corrosion1MINThe size of (d);
if i1＞I1MAXThen go to step S4;
if i1＜I1MINThen go to step S6;
if I1MAX≥i1≥I1MINThen, the process proceeds to step S8.
Step S4, closing the first transistor Q1And a second transistor Q2A third sampling resistor r3The third sampling voltage is output to the data processing unit through the signal operational amplifier conditioning circuit and the analog-to-digital conversion circuit, and the data processing unit obtains a second atmospheric corrosion monitoring current value i according to the third sampling voltage2；
Specifically, the data processing unit divides the third sampling voltage by the third sampling resistor r3So as to obtain a second monitoring current value i of atmospheric corrosion2。
Step 5, judging a second monitoring current value i of atmospheric corrosion2A second preset current value I with atmospheric corrosion2The size of (d);
if i2＜I2Then return to step S2;
if i2≥I2Then, the process proceeds to step S8.
Step S6, turning off the first transistor Q1And a second transistor Q2A third sampling resistor r3A second sampling resistor r3And a first sampling resistor r1The first sampling voltage after being sequentially connected in series is output to the data processing unit through the signal operational amplifier conditioning circuit and the analog-to-digital conversion circuit, and the data processing unit obtains a third atmospheric corrosion monitoring current value i according to the first sampling voltage3；
Specifically, the data processing unit divides the first sampling voltage by the third sampling resistor r3A second sampling resistor r3And a first sampling resistor r1The third monitoring current value i of atmospheric corrosion can be obtained by the sum of the resistance values3。
Step S7, determining the third monitoring current value i of atmospheric corrosion3Third preset current value I of atmospheric corrosion3The size of (d);
if i3＞I3Then return to step S2;
if i3≤I3Then, the process proceeds to step S8.
Step S8, the data processing unit corrodes the atmosphere by the first monitoring current value i1A second monitoring current value i of atmospheric corrosion2And/or third monitoring current value i of atmospheric corrosion3Storing the data to a data storage module; or
The data processing unit is used for monitoring a first atmospheric corrosion current value i1A second monitoring current value i of atmospheric corrosion2And/or atmospheric corrosionThird monitoring current value i3And transmitting the data to a remote data management center.
The atmospheric corrosion monitoring method provided by the embodiment of the invention is a specific use method of the atmospheric corrosion monitoring system provided by the embodiment of the invention, and has the same beneficial effects as those of the atmospheric corrosion monitoring system provided by the embodiment of the invention, and details are not repeated herein.
It is noted that after the atmospheric corrosion monitoring system is initialized, the first transistor Q is used1And a second transistor Q2May be random, that is to say the first transistor Q1And a second transistor Q2May be both closed or both open, or the first transistor Q1Closed and second transistor Q2Disconnecting; the atmospheric corrosion monitoring method provided by the embodiment of the invention can also be used for monitoring the atmospheric corrosion according to the first transistor Q1And a second transistor Q2Selectively go to the corresponding step S2, step S4 or step S6, namely: when the first transistor Q1Closed and second transistor Q2When the disconnection is performed, the routine proceeds to step S2; when the first transistor Q1And a second transistor Q2When both are closed, the routine proceeds to step S4; when the first transistor Q1And a second transistor Q2When both are off, the process proceeds to step S6.
It should be noted that, referring to fig. 4, when the atmospheric corrosion monitoring system further includes a temperature and humidity acquisition module for acquiring a digital temperature signal and a digital humidity signal in the installation and operation environment of the power transmission line, and the data processing unit is further connected to the output end of the humidity and temperature acquisition module,
in the atmospheric corrosion monitoring method, step S8 further includes:
the temperature and humidity acquisition module acquires a digital temperature signal and a digital humidity signal in the installation and operation environment of the power transmission line and outputs the digital temperature signal and the digital humidity signal to the data processing unit;
the data processing unit stores the digital temperature signal and the digital humidity signal to the data storage module; or the data processing unit transmits the digital temperature signal and the digital humidity signal to a remote data management center.
According to the atmospheric corrosion monitoring method provided by the embodiment, after the digital temperature signal and the digital humidity signal in the installation and operation environment of the power transmission line are output to the data processing unit by using the humidity acquisition module, reference can be provided for the atmospheric corrosion monitoring current value in the same environment obtained by the data processing unit by using the digital temperature signal and the digital humidity signal, so that more accurate atmospheric corrosion data can be obtained.
It can be understood that, in order to facilitate searching atmospheric corrosion data in the installation and operation environment of the power transmission line and to facilitate analyzing a rule of the atmospheric corrosion data changing with time, in the atmospheric corrosion monitoring method provided in the foregoing embodiment, please refer to fig. 4 continuously, and step S8 further includes:
obtaining a first monitoring current value i relative to atmospheric corrosion1A second monitoring current value i of atmospheric corrosion2And/or third monitoring current value i of atmospheric corrosion3First monitoring time t in one-to-one correspondence1Second monitoring time t2And/or a third monitoring time t3；
The data processing unit will monitor the first time t1Second monitoring time t2And/or a third monitoring time t3Respectively corresponding to a first monitoring current value i of atmospheric corrosion1A second monitoring current value i of atmospheric corrosion2And/or third monitoring current value i of atmospheric corrosion3Storing the data to a data storage module; or,
the data processing unit will monitor the first time t1Second monitoring time t2And/or a third monitoring time t3Respectively corresponding to a first monitoring current value i of atmospheric corrosion1A second monitoring current value i of atmospheric corrosion2And/or third monitoring current value i of atmospheric corrosion3And transmitting the data to a remote data management center.
It should be noted that the atmospheric corrosion monitoring method is continuously and circularly executed in the online monitoring of the atmospheric corrosion of the power transmission line, and the cycle period of the atmospheric corrosion monitoring method can be determined according to the operation scene of the atmospheric corrosion monitoring system, the monitoring requirement of the atmospheric corrosion of the power transmission line and the like. After the storage or transmission of the atmospheric corrosion data is completed, a waiting time interval is usually reserved, and the acquisition of the next atmospheric corrosion data is started.
In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (8)
1. An atmospheric corrosion monitoring system is characterized by comprising an electrochemical probe for obtaining atmospheric corrosion current, a current sensor for converting the atmospheric corrosion current into a digital voltage signal, and a data processing unit for receiving and processing the digital voltage signal; wherein,
the current sensor comprises a multi-gear sampling resistance module connected with the electrochemical probe, and a signal operational amplifier conditioning circuit and an analog-to-digital conversion circuit which are sequentially connected with the multi-gear sampling resistance module in series;
and the data processing unit is connected with the output end of the analog-to-digital conversion circuit.
2. The atmospheric corrosion monitoring system of claim 1, wherein the multi-shift sampling resistor module is a three-shift sampling resistor module; the three-gear sampling resistor module comprises a first sampling resistor, a second sampling resistor and a third sampling resistor which are sequentially connected in series from high resistance value to low resistance value; wherein,
the first sampling resistor is connected with a first transistor in parallel and is connected with a positive electrode lead of the electrochemical probe; the second sampling resistor is connected with a second transistor in parallel; the third sampling resistor is connected with a negative lead of the electrochemical probe;
the third sampling voltage of third sampling resistance, the third sampling resistance with the second sampling voltage after the second sampling resistance is established ties, and the third sampling resistance the second sampling resistance with first sampling voltage after first sampling resistance establishes ties in proper order inserts respectively the conditioning circuit is put to signal fortune.
3. The atmospheric corrosion monitoring system of claim 2, wherein the electrochemical probe comprises a carrier container disposed in an installation and operation environment of the power transmission line, and the carrier container is internally stacked with a corrosion metal test piece and a printed circuit board in sequence; the printed circuit board includes: the device comprises an insulating substrate arranged on the surface of the corrosion metal test piece, a gold immersion layer arranged on the surface of the insulating substrate, which is opposite to the corrosion metal test piece, and a plurality of parallel grooves penetrating through the gold immersion layer and the insulating substrate; wherein,
the gold immersion layer is connected with the first sampling resistor through a positive lead, and the corrosion metal test piece is connected with the third sampling resistor through a negative lead;
the surface to be corroded of the corrosion metal test piece exposed in the parallel grooves is in contact with air, and the surface to be sealed of the corrosion metal test piece exposed on the outer side of the periphery of the insulating substrate is covered by insulating glue.
4. The atmospheric corrosion monitoring system according to any one of claims 1 to 3, further comprising a temperature and humidity acquisition module for acquiring digital temperature signals and digital humidity signals in the installation and operation environment of the transmission line;
the data processing unit is also connected with the output end of the humidity and temperature acquisition module.
5. The atmospheric corrosion monitoring system of claim 4, further comprising a photovoltaic power module connected to the current sensor, the humidity and temperature acquisition module, and the data processing unit, respectively.
6. An atmospheric corrosion monitoring method, which is applied to the atmospheric corrosion monitoring system of claim 2, and comprises the following steps:
step 1, initializing an atmospheric corrosion monitoring system;
step 2, closing the first transistor, opening the second transistor, outputting a second sampling voltage obtained by connecting the third sampling resistor and the second sampling resistor in series to a data processing unit through a signal operational amplifier conditioning circuit and an analog-to-digital conversion circuit, and obtaining a first atmospheric corrosion monitoring current value by the data processing unit according to the second sampling voltage;
step 3, judging the magnitude of the first monitoring current value of atmospheric corrosion and the maximum value of a first preset current of atmospheric corrosion, and judging the magnitude of the first monitoring current value of atmospheric corrosion and the minimum value of the first preset current of atmospheric corrosion;
if the first monitoring current value of the atmospheric corrosion is larger than the first preset current maximum value of the atmospheric corrosion, turning to the step 4;
if the first monitoring current value of the atmospheric corrosion is smaller than the first preset current minimum value of the atmospheric corrosion, turning to step 6;
if the first monitoring current value of atmospheric corrosion is greater than or equal to the first preset current minimum value of atmospheric corrosion, and the first monitoring current value of atmospheric corrosion is less than or equal to the first preset current maximum value of atmospheric corrosion, then the step 8 is carried out;
step 4, closing the first transistor and the second transistor, outputting a third sampling voltage of the third sampling resistor to the data processing unit through the signal operational amplifier conditioning circuit and the analog-to-digital conversion circuit, and obtaining a second atmospheric corrosion monitoring current value by the data processing unit according to the third sampling voltage;
step 5, judging the magnitude of the second monitoring current value of atmospheric corrosion and the magnitude of a second preset current value of atmospheric corrosion;
if the second monitoring current value of the atmospheric corrosion is smaller than the second preset current value of the atmospheric corrosion, returning to the step 2;
if the second monitoring current value of the atmospheric corrosion is larger than or equal to the second preset current value of the atmospheric corrosion, turning to step 8;
step 6, disconnecting the first transistor and the second transistor, outputting a first sampling voltage obtained by sequentially connecting the third sampling resistor, the second sampling resistor and the first sampling resistor in series to the data processing unit through the signal operational amplifier conditioning circuit and the analog-to-digital conversion circuit, and obtaining a third monitoring current value of atmospheric corrosion by the data processing unit according to the first sampling voltage;
step 7, judging the magnitude of the third monitoring current value of atmospheric corrosion and the third preset current value of atmospheric corrosion;
if the third monitoring current value of the atmospheric corrosion is larger than the third preset current value of the atmospheric corrosion, returning to the step 2;
if the third monitoring current value of the atmospheric corrosion is less than or equal to the third preset current value of the atmospheric corrosion, turning to step 8;
step 8, the data processing unit stores the first monitoring current value of atmospheric corrosion, the second monitoring current value of atmospheric corrosion and/or the third monitoring current value of atmospheric corrosion to a data storage module; or
And the data processing unit transmits the first monitoring current value of atmospheric corrosion, the second monitoring current value of atmospheric corrosion and/or the third monitoring current value of atmospheric corrosion to a remote data management center.
7. The atmospheric corrosion monitoring method of claim 6, wherein the atmospheric corrosion monitoring system further comprises a temperature and humidity acquisition module for acquiring digital temperature signals and digital humidity signals in the installation and operation environment of the transmission line; the data processing unit is also connected with the output end of the humidity and temperature acquisition module;
in the atmospheric corrosion monitoring method, step 8 further includes:
the temperature and humidity acquisition module acquires a digital temperature signal and a digital humidity signal in an installation and operation environment of the power transmission line and outputs the digital temperature signal and the digital humidity signal to the data processing unit;
the data processing unit stores the digital temperature signal and the digital humidity signal to a data storage module; or the data processing unit transmits the digital temperature signal and the digital humidity signal to a remote data management center.
8. The atmospheric corrosion monitoring method of claim 6, wherein the step 8 further comprises:
acquiring a first monitoring moment, a second monitoring moment and/or a third monitoring moment which are in one-to-one correspondence with the first monitoring current value, the second monitoring current value and/or the third monitoring current value of atmospheric corrosion;
the data processing unit stores the first monitoring time, the second monitoring time and/or the third monitoring time to a data storage module respectively corresponding to the atmospheric corrosion first monitoring current value, the atmospheric corrosion second monitoring current value and/or the atmospheric corrosion third monitoring current value; or,
and the data processing unit transmits the first monitoring time, the second monitoring time and/or the third monitoring time to a remote data management center respectively corresponding to the first monitoring current value of atmospheric corrosion, the second monitoring current value of atmospheric corrosion and/or the third monitoring current value of atmospheric corrosion.
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