CN112981416A - Cathode protection potential frequency division detection method and device for buried steel pipeline - Google Patents
Cathode protection potential frequency division detection method and device for buried steel pipeline Download PDFInfo
- Publication number
- CN112981416A CN112981416A CN202110072562.7A CN202110072562A CN112981416A CN 112981416 A CN112981416 A CN 112981416A CN 202110072562 A CN202110072562 A CN 202110072562A CN 112981416 A CN112981416 A CN 112981416A
- Authority
- CN
- China
- Prior art keywords
- signal
- direct current
- pipeline
- protection potential
- interference signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
- C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
- C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
- C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
- C23F13/22—Monitoring arrangements therefor
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Prevention Of Electric Corrosion (AREA)
Abstract
The invention discloses a cathode protection potential frequency division detection method for a buried steel pipeline, which comprises the following steps: performing frequency division on the pipeline potential signal by adopting a second-order active high-pass linear filter and a third-order active low-pass linear filter to obtain a composite signal of an alternating current interference signal, a direct current signal and a very low frequency alternating current interference signal below 5 HZ; separating the composite signal by adopting a digital filtering technology to respectively obtain the direct current signal and the extremely low frequency alternating current interference signal and detecting; separating the composite signal by adopting a power-off method to obtain an effective direct current protection potential signal and detecting the effective direct current protection potential signal; and subtracting the value of the effective direct current protection potential signal from the value of the direct current signal to obtain the value of the direct current interference signal. The invention adopts the precise frequency division technology to carry out frequency division measurement on various composite signal components in the pipeline potential, thus completing the accurate measurement of the pipeline cathode protection potential and the accurate quantitative analysis on various interference signals influencing the cathode protection effect.
Description
Technical Field
The invention relates to the technical field of steel pipeline transportation protection detection, in particular to a buried steel pipeline cathodic protection potential frequency division detection method and a buried steel pipeline cathodic protection potential frequency division detection device.
Background
The accurate measurement of the cathodic protection potential of an underground metal pipeline is a basic means for well controlling the corrosion of the pipeline and ensuring the operation safety of the pipeline. Under ideal working conditions, the cathodic protection potential of the pipeline is a direct current voltage signal of about-0.85V to-1.25V, and the detection can be carried out by adopting a common voltage measurement method; however, the running environment of the urban underground pipe network is more and more complex at present, the cathode protection potential of the buried steel pipeline shows a complex form, and the reading of a meter is often shown to fluctuate greatly when the conventional voltage measurement method is adopted for detection, so that the detection work is difficult to complete.
In the existing detection technology, the detection of the pipeline potential is measured by adopting a conventional voltage measurement method, and is feasible without interference, but under the condition of interference of stray current and the like, the reading of a meter for cathode protection potential detection cannot be stable, and the correct potential of the pipeline cannot be measured. At present, the cathodic protection potential of a pipeline in a complex environment is detected by methods such as outage potential detection and polarized probe detection which are recommended by GB21246 buried steel pipeline cathodic protection parameter measurement method, NACE TM0497-2002 buried or underwater metal pipeline system cathodic protection standard and the like. The polarized probe detection method is used for shielding and detecting interference signals of a measurement target, the time required by measurement is long, the shielding effect is poor under the condition of serious interference, and the measurement cannot be finished; the detection of the power-off potential adopts a polarization potential substitution principle to measure, belongs to an indirect detection method, can eliminate interference signals, but has a more complex measurement process, and under the condition of more serious interference, the polarization process is unstable, and the measurement randomness is higher. Neither of the above two methods can detect and analyze the nature and effect of interfering signals.
Disclosure of Invention
The invention aims to provide a frequency division detection method and a frequency division detection device for cathode protection potential of a buried steel pipeline, which adopt a method for carrying out frequency division measurement on various signal components compounded in the potential of the pipeline by adopting an accurate frequency division technology, can respectively detect the intensity of each component signal in a complex signal, completes accurate measurement on the cathode protection potential of the pipeline, and carries out accurate quantitative analysis on various interference signals influencing the cathode protection effect so as to solve the problem of detecting the cathode protection potential of the pipeline in a complex environment.
In order to achieve the above object, an embodiment of the present invention provides a method for detecting cathode protection potential frequency division of a buried steel pipeline, including:
adopting a second-order active high-pass linear filter to carry out frequency division on a pipeline potential signal to obtain a power frequency alternating current interference signal, detecting the power frequency alternating current interference signal, and adopting a third-order active low-pass linear filter to carry out frequency division on the pipeline potential signal to obtain a direct current signal and a composite signal of a very low frequency alternating current interference signal below 5 HZ;
separating the composite signal of the direct current signal and the extremely low frequency alternating current interference signal below 5HZ by adopting a digital filtering technology, respectively obtaining the direct current signal and the extremely low frequency alternating current interference signal below 5HZ, and respectively detecting the direct current signal and the extremely low frequency alternating current interference signal below 5 HZ;
separating the composite signal of the direct current signal and the extremely low frequency alternating current interference signal below 5HZ by adopting a power-off method to obtain an effective direct current protection potential signal, and detecting the effective direct current protection potential signal;
and subtracting the value of the direct current signal from the value of the effective direct current protection potential signal to obtain the value of the direct current interference signal.
The embodiment of the invention also provides a cathode protection potential frequency division detection device for the buried steel pipeline, which is applied to the cathode protection potential frequency division detection method for the buried steel pipeline in any embodiment. The method comprises the following steps:
the first detection unit is used for carrying out frequency division on the pipeline potential signal by adopting a second-order active high-pass linear filter to obtain a power frequency alternating-current interference signal and detecting the power frequency alternating-current interference signal, and carrying out frequency division on the pipeline potential signal by adopting a third-order active low-pass linear filter to obtain a direct-current signal and a composite signal of a very-low-frequency alternating-current interference signal below 5 HZ;
the second detection unit is used for separating the composite signal of the direct current signal and the extremely low frequency alternating current interference signal below 5HZ by adopting a digital filtering technology, respectively obtaining the direct current signal and the extremely low frequency alternating current interference signal below 5HZ, and respectively detecting the direct current signal and the extremely low frequency alternating current interference signal below 5 HZ;
the third detection unit is used for separating the composite signal of the direct current signal and the extremely low frequency alternating current interference signal below 5HZ by adopting a power-off method to obtain an effective direct current protection potential signal and detecting the effective direct current protection potential signal;
and the calculating unit is used for subtracting the value of the direct current signal from the value of the effective direct current protection potential signal to obtain the value of the direct current interference signal.
In one embodiment, the present invention also provides a computer terminal device including one or more processors and a memory. A memory coupled to the processor for storing one or more programs; when executed by the one or more processors, cause the one or more processors to implement a method for detecting a cathodic protection potential of a buried steel pipeline as in any one of the embodiments above.
The embodiment of the invention also provides a computer readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the method for detecting the cathodic protection potential frequency division of the buried steel pipeline is implemented as described in any one of the above embodiments.
In the cathode protection potential frequency division detection method for the buried steel pipeline, the method for carrying out frequency division measurement on various signal components compounded in the pipeline potential by adopting the precise frequency division technology can respectively detect the strength of each component signal in a complex signal, complete accurate measurement on the pipeline cathode protection potential and carry out accurate quantitative analysis on various interference signals influencing the cathode protection effect.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flow chart of a cathode protection potential frequency division detection method for a buried steel pipeline according to an embodiment of the present invention;
FIG. 2 is a graph of a potential signal measured by a conventional measurement method according to an embodiment of the present invention;
FIG. 3 is a representative graph of the component spectrum of a potential signal provided by an embodiment of the present invention;
fig. 4 is a schematic block diagram of a buried steel pipeline cathodic protection potential frequency division detection method according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a computer terminal device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be understood that the step numbers used herein are for convenience of description only and are not intended as limitations on the order in which the steps are performed.
It is to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
The terms "comprises" and "comprising" indicate the presence of the described features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
The term "and/or" refers to and includes any and all possible combinations of one or more of the associated listed items.
Referring to fig. 1, an embodiment of the present invention provides a method for detecting a cathode protection potential frequency division of a buried steel pipeline, including:
s10, performing frequency division on the pipeline potential signal by adopting a second-order active high-pass linear filter to obtain a power frequency alternating current interference signal, detecting the power frequency alternating current interference signal, and performing frequency division on the pipeline potential signal by adopting a third-order active low-pass linear filter to obtain a composite signal of a direct current signal and a very low frequency alternating current interference signal below 5 HZ;
s20, separating the composite signal of the direct current signal and the extremely low frequency alternating current interference signal below 5HZ by adopting a digital filtering technology, respectively obtaining the direct current signal and the extremely low frequency alternating current interference signal below 5HZ, and respectively detecting the direct current signal and the extremely low frequency alternating current interference signal below 5 HZ;
s30, separating the composite signal of the direct current signal and the extremely low frequency alternating current interference signal below 5HZ by adopting a power-off method to obtain an effective direct current protection potential signal, and detecting the effective direct current protection potential signal;
and S40, subtracting the value of the direct current signal and the value of the effective direct current protection potential signal to obtain the value of the direct current interference signal.
Referring to fig. 2, in this embodiment, under a complex working condition, the pipeline potential signal is a complex signal composed of an effective dc protection potential signal loaded by the cathodic protection system, an external dc interference signal, a very low frequency interference signal generated by an unstable dc interference signal, a power-frequency ac interference signal coupled to the power grid, and the like; because the effective protection potential of the pipeline is a direct current potential with a small value, analysis and measurement of various signals show that the intensity of an interference signal is usually far greater than that of an effective signal, which is a main reason for causing measurement difficulty.
Referring to fig. 3, the potential signal mainly comprises a potential signal compounded by an effective pipeline protection potential of-0.85V, a direct current interference signal with an interference intensity of about-0.2V, a very low frequency alternating interference signal with an interference intensity of about 2V and a frequency of about 2HZ, and a power frequency interference signal with an interference intensity of 5V.
Referring to fig. 4, therefore, for the pipeline potential signal collected under the complex working condition, a second-order active high-pass linear filter is used to divide the frequency of the pipeline potential signal, so as to obtain a power frequency alternating current interference signal, and the power frequency alternating current interference signal is detected. And (3) carrying out frequency division processing on the pipeline potential signal by adopting a third-order active low-pass linear filter, and eliminating power frequency signal interference to obtain a direct current signal and a very low frequency alternating current signal composite signal below 5 HZ. And then, separating the direct current signal and the extremely low frequency alternating current signal with the frequency of 0.1-5 HZ from the direct current signal and the extremely low frequency alternating current signal with the frequency of less than 5HZ composite signal by adopting a digital filtering technology, and then respectively detecting the direct current signal and the extremely low frequency alternating current signal with the frequency of 0.1-5 HZ. Separating the direct current signal and the extremely low frequency alternating current signal composite signal below 5HZ by adopting a power-off method to obtain an effective direct current protection potential signal, measuring the value of the effective direct current protection potential signal, then subtracting the effective direct current protection potential signal from the direct current signal to obtain the value of a direct current interference signal, and thus obtaining the value of the power frequency alternating current interference signal, the extremely low frequency alternating current signal value with the frequency of 0.1-5 HZ, the value of the effective direct current protection potential signal and the value of the direct current interference signal respectively. The method comprises the steps of forming a frequency spectrum by cathode protection potential signals under complex conditions, carrying out frequency division filtering on the potential signals of the pipeline according to different sources and types by adopting an accurate frequency division technology, directly and respectively measuring effective protection potential signals and various interference signals at one time, accurately measuring the effective protection potential and the interference signals of the pipeline under the complex conditions, and conveniently and accurately analyzing the protection state of the pipeline.
The embodiment of the invention also provides a cathode protection potential frequency division detection device for the buried steel pipeline, which is applied to the cathode protection potential frequency division detection method for the buried steel pipeline in any embodiment. The method comprises the following steps:
the first detection unit is used for carrying out frequency division on the pipeline potential signal by adopting a second-order active high-pass linear filter to obtain a power frequency alternating-current interference signal and detecting the power frequency alternating-current interference signal, and carrying out frequency division on the pipeline potential signal by adopting a third-order active low-pass linear filter to obtain a direct-current signal and a composite signal of a very-low-frequency alternating-current interference signal below 5 HZ;
the second detection unit is used for separating the composite signal of the direct current signal and the extremely low frequency alternating current interference signal below 5HZ by adopting a digital filtering technology, respectively obtaining the direct current signal and the extremely low frequency alternating current interference signal below 5HZ, and respectively detecting the direct current signal and the extremely low frequency alternating current interference signal below 5 HZ;
the third detection unit is used for separating the composite signal of the direct current signal and the extremely low frequency alternating current interference signal below 5HZ by adopting a power-off method to obtain an effective direct current protection potential signal and detecting the effective direct current protection potential signal;
and the calculating unit is used for subtracting the value of the direct current signal from the value of the effective direct current protection potential signal to obtain the value of the direct current interference signal.
The embodiment of the invention provides a cathode protection potential frequency division detection device for a buried steel pipeline, which is applied to the cathode protection potential frequency division detection method for the buried steel pipeline in any one embodiment.
For the specific definition of the cathodic protection potential frequency division detection device for the buried steel pipeline, reference may be made to the above definition, and details are not described here. All modules in the cathode protection potential frequency division detection device for the buried steel pipeline can be completely or partially realized through software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
Referring to fig. 5, an embodiment of the invention provides a computer terminal device, which includes one or more processors and a memory. The storage is coupled to the processor and is used for storing one or more programs, and when the one or more programs are executed by the one or more processors, the one or more processors implement the buried steel pipeline cathodic protection potential frequency division detection method in any one of the embodiments.
The processor is used for controlling the overall operation of the computer terminal equipment so as to complete all or part of the steps of the buried steel pipeline cathodic protection potential frequency division detection method. The memory is used to store various types of data to support the operation at the computer terminal device, which data may include, for example, instructions for any application or method operating on the computer terminal device, as well as application-related data. The Memory may be implemented by any type of volatile or non-volatile Memory device or combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic Memory, flash Memory, magnetic disk, or optical disk.
In an exemplary embodiment, the computer terminal Device may be implemented by one or more Application Specific 1 integrated circuits (AS 1C), a Digital Signal Processor (DSP), a Digital Signal Processing Device (DSPD), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), a controller, a microcontroller, a microprocessor or other electronic components, and is configured to perform the above-mentioned buried steel pipe cathodic protection potential divider detection method and achieve the technical effects consistent with the above-mentioned methods.
In another exemplary embodiment, there is also provided a computer readable storage medium comprising program instructions which, when executed by a processor, implement the steps of the method for detecting the cathodic protection potential of a buried steel pipeline in any one of the above embodiments. For example, the computer readable storage medium may be the above-mentioned memory including program instructions, and the above-mentioned program instructions may be executed by a processor of a computer terminal device to implement the above-mentioned buried steel pipeline cathodic protection potential frequency division detection method, and achieve the technical effects consistent with the above-mentioned method.
In the cathode protection potential frequency division detection method for the buried steel pipeline, the method for carrying out frequency division measurement on various signal components compounded in the pipeline potential by adopting the precise frequency division technology can respectively detect the strength of each component signal in a complex signal, complete accurate measurement on the pipeline cathode protection potential and carry out accurate quantitative analysis on various interference signals influencing the cathode protection effect.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (4)
1. A cathode protection potential frequency division detection method for a buried steel pipeline is characterized by comprising the following steps:
adopting a second-order active high-pass linear filter to carry out frequency division on a pipeline potential signal to obtain a power frequency alternating current interference signal, detecting the power frequency alternating current interference signal, and adopting a third-order active low-pass linear filter to carry out frequency division on the pipeline potential signal to obtain a direct current signal and a composite signal of a very low frequency alternating current interference signal below 5 HZ;
separating the composite signal of the direct current signal and the extremely low frequency alternating current interference signal below 5HZ by adopting a digital filtering technology, respectively obtaining the direct current signal and the extremely low frequency alternating current interference signal below 5HZ, and respectively detecting the direct current signal and the extremely low frequency alternating current interference signal below 5 HZ;
separating the composite signal of the direct current signal and the extremely low frequency alternating current interference signal below 5HZ by adopting a power-off method to obtain an effective direct current protection potential signal, and detecting the effective direct current protection potential signal;
and subtracting the value of the direct current signal from the value of the effective direct current protection potential signal to obtain the value of the direct current interference signal.
2. The utility model provides a buried steel pipeline cathodic protection potential frequency division detection device which characterized in that includes:
the first detection unit is used for carrying out frequency division on the pipeline potential signal by adopting a second-order active high-pass linear filter to obtain a power frequency alternating-current interference signal and detecting the power frequency alternating-current interference signal, and carrying out frequency division on the pipeline potential signal by adopting a third-order active low-pass linear filter to obtain a direct-current signal and a composite signal of a very-low-frequency alternating-current interference signal below 5 HZ;
the second detection unit is used for separating the composite signal of the direct current signal and the extremely low frequency alternating current interference signal below 5HZ by adopting a digital filtering technology, respectively obtaining the direct current signal and the extremely low frequency alternating current interference signal below 5HZ, and respectively detecting the direct current signal and the extremely low frequency alternating current interference signal below 5 HZ;
the third detection unit is used for separating the composite signal of the direct current signal and the extremely low frequency alternating current interference signal below 5HZ by adopting a power-off method to obtain an effective direct current protection potential signal and detecting the effective direct current protection potential signal;
and the calculating unit is used for subtracting the value of the direct current signal from the value of the effective direct current protection potential signal to obtain the value of the direct current interference signal.
3. A computer terminal device, comprising:
one or more processors;
a memory coupled to the processor for storing one or more programs;
when executed by the one or more processors, cause the one or more processors to implement the pipeline cathodic protection potential divide-by-frequency detection method of claim 1.
4. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements the method of pipeline cathodic protection potential frequency division detection as set forth in claim 1.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110072562.7A CN112981416A (en) | 2021-01-19 | 2021-01-19 | Cathode protection potential frequency division detection method and device for buried steel pipeline |
| CN202210061838.6A CN114250475A (en) | 2021-01-19 | 2022-01-19 | Method and device for detecting cathodic protection parameters of buried pipeline and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110072562.7A CN112981416A (en) | 2021-01-19 | 2021-01-19 | Cathode protection potential frequency division detection method and device for buried steel pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112981416A true CN112981416A (en) | 2021-06-18 |
Family
ID=76344427
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110072562.7A Pending CN112981416A (en) | 2021-01-19 | 2021-01-19 | Cathode protection potential frequency division detection method and device for buried steel pipeline |
| CN202210061838.6A Pending CN114250475A (en) | 2021-01-19 | 2022-01-19 | Method and device for detecting cathodic protection parameters of buried pipeline and storage medium |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210061838.6A Pending CN114250475A (en) | 2021-01-19 | 2022-01-19 | Method and device for detecting cathodic protection parameters of buried pipeline and storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN112981416A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020050830A1 (en) * | 1999-07-13 | 2002-05-02 | Flight Refuelling Limited | Anode monitoring and subsea pipeline power transmission |
| CN206015097U (en) * | 2016-10-09 | 2017-03-15 | 上海道盾科技股份有限公司 | A kind of detection means of cathodic protection test pile mesohigh direct current transportation interference |
| CN207567349U (en) * | 2017-11-09 | 2018-07-03 | 中国石油天然气股份有限公司 | Cathodic protection potential test equipment |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100508388C (en) * | 2004-10-09 | 2009-07-01 | 深圳迈瑞生物医疗电子股份有限公司 | Industry frequency automatic tracking filtering method and device |
| CN100438336C (en) * | 2006-12-21 | 2008-11-26 | 上海交通大学 | Frequency tracking power frequency digital filtering method |
| CN104928686B (en) * | 2015-05-08 | 2017-12-22 | 中国石油化工股份有限公司 | A kind of buried pipeline cathodic protection data collecting system |
| CN206070005U (en) * | 2016-10-09 | 2017-04-05 | 上海道盾科技股份有限公司 | A kind of device for monitoring AC influence in cathodic protection test pile |
| CN110646682B (en) * | 2019-09-23 | 2021-06-22 | 辽宁工程技术大学 | System for monitoring interference potential of metal buried pipeline in real time |
-
2021
- 2021-01-19 CN CN202110072562.7A patent/CN112981416A/en active Pending
-
2022
- 2022-01-19 CN CN202210061838.6A patent/CN114250475A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020050830A1 (en) * | 1999-07-13 | 2002-05-02 | Flight Refuelling Limited | Anode monitoring and subsea pipeline power transmission |
| CN206015097U (en) * | 2016-10-09 | 2017-03-15 | 上海道盾科技股份有限公司 | A kind of detection means of cathodic protection test pile mesohigh direct current transportation interference |
| CN207567349U (en) * | 2017-11-09 | 2018-07-03 | 中国石油天然气股份有限公司 | Cathodic protection potential test equipment |
Non-Patent Citations (1)
| Title |
|---|
| 鲍元飞: "交流杂散电流干扰对埋地管道阴极保护电位的影响", 《腐蚀与防护》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114250475A (en) | 2022-03-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Moschitta et al. | Performance comparison of advanced techniques for voltage dip detection | |
| CN110806556A (en) | Metering abnormity on-line monitoring method and system and readable storage medium | |
| CN111690938B (en) | Cathode protection intelligent control method and system | |
| CN108896820A (en) | It is a kind of suitable for static frequency changer starting phase modifier open machine protection phasor calculating method | |
| CN112981416A (en) | Cathode protection potential frequency division detection method and device for buried steel pipeline | |
| CN104076083A (en) | Heavy metal ion concentration test method adopting secondary sample injection | |
| CN108171960B (en) | Self-diagnosis method and system for abnormity of metering device of integrated energy management platform | |
| CN109901003B (en) | Inverter power fault detection method and system | |
| CN117491792A (en) | Power consumption abnormality detection method, system and storage medium based on intelligent ammeter | |
| CN109856550A (en) | The evaluation method and system of the SOC of flow battery | |
| CN115047400A (en) | Method and system for checking accuracy of three-phase electric energy meter, terminal equipment and medium | |
| CN110259435B (en) | Well condition change identification method based on oil pumping unit electrical parameters | |
| Wetula | A Hilbert transform based algorithm for detection of a complex envelope of a power grid signals-an implementation | |
| JP2004177124A (en) | Method for measuring corrosion of reinforcing bar inside concrete | |
| CN113687128A (en) | Current detection method, device and equipment of photovoltaic PID suppression circuit | |
| CN103401534B (en) | Based on the method for the final voltage fast prediction of RC circuit discharge and recharge | |
| CN114167108A (en) | Electric energy meter phasor diagram drawing method, system, device and storage medium | |
| Hussain et al. | Implementation of quadrature based RMS calculation on real-time power monitoring systems | |
| CN109375144B (en) | Current loss fault monitoring method and device based on three-phase four-wire meter equipment | |
| CN117110976B (en) | Ammeter anomaly detection method and device, electronic equipment and storage medium | |
| CN117761404B (en) | Harmonic impedance measurement method, system, medium and equipment based on surface fitting | |
| CN116882766B (en) | Power consumption abnormal distribution risk analysis method and system | |
| CN108614147A (en) | Voltage fluctuation detection method and its Source of Gateway Meter | |
| CN113790795B (en) | Noise contribution measuring method, device, equipment and storage medium | |
| ES2711204B2 (en) | Procedure and system for analyzing power quality and quality index 2S2PQ, characterization of the signal at a point of the electricity supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20210618 |
|
| WD01 | Invention patent application deemed withdrawn after publication |