Potential detection and collection system for pulse constant potential power supply
A potential detection and acquisition system technology, applied in the field of corrosion and protection, can solve the problems of the system not responding to the situation, and achieve the effect of high long-term working stability, high integration, and guaranteed accuracy of potential detection
Inactive Publication Date: 2015-03-25
XI'AN PETROLEUM UNIVERSITY
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Problems solved by technology
Therefore, it is the future development trend to adopt the pulse constant potential power supply system to implement cathodic protection for oil well casings. In cathodic protection, it is necessary to measure the protective potential of the metal, that is, the potential value required for the metal to stop corrosion, to judge whether the metal structure has reached Complete protection. Compared with the ordinary DC potentiostat, the output of the pulse constant potential power supply system is a pulse current that changes at a high speed with time. Therefore, the potential detection and acquisition system must be redesigned according to the characteristics of pulse current cathodic protection to meet actual needs. , but such a system is not yet available
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[0012] The present invention is described in detail below in conjunction with accompanying drawing.
[0013] Refer to attached figure 1 , a potential detection and acquisition system of a pulse constant potential power supply, including a switching DC power supply 1 for supplying power to a control system, the switching DC power supply 1 is connected to a power interface of a microprocessor unit 2, and the AD input port of the microprocessor unit 2 is connected to the The output end of the filter circuit 3 is connected; the input end of the filter circuit 3 is connected with the output end of the Hall voltage sensor 4, and the input end of the Hall voltage sensor 4 is connected with the reference electrode 5 installed near the oil well casing.
[0014] The microprocessor unit 2 adopts a high-performance single-chip microcomputer or a digital signal processor DSP.
[0015] Working principle of the present invention is:
[0016] When working, the Hall voltage sensor collects t...
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The invention provides a potential detection and collection system for a pulse constant potential power supply. A switching DC power supply is connected with a microprocessor unit, a parameter input key and a display are connected with the microprocessor unit, and the AD input port of the microprocessor unit is connected with a filter circuit; the filter circuit is connected with a Hall voltage sensor, and the Hall voltage sensor is connected with a reference electrode installed near an oil well casing; by adopting the Hall voltage sensor, the potential detection accuracy of the pulse constant potential power supply is guaranteed from the source, the filter circuit is used for eliminating a measurement error caused by external interference to a great extent, a high-performance microprocessor and an advanced digital filter algorithm are used for enabling a measurement result to approach to an actual value to the maximum, and the potential detection and collection system has the advantages of high accuracy, good instantaneity and strong anti-interference capability.
Description
technical field [0001] The invention belongs to the technical field of corrosion and protection, and in particular relates to a potential detection and collection system of a pulse constant potential power supply, which is used for potential detection and collection of a pulse constant potential power supply dedicated to cathodic protection of oil well casings. Background technique [0002] Oil well casing is an important facility in petroleum production. At present, DC type potentiostats are widely used at home and abroad to carry out impressed current cathodic protection on it. Although this technology is a very effective and economical method to prevent casing outer wall corrosion, but at the same time There is a fatal flaw in this technology, that is, the DC cathodic protection cannot reach the protection depth actually required by the oil well casing, especially for some deep wells and ultra-deep wells, and this problem becomes particularly prominent. Recent studies hav...
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IPC IPC(8): C23F13/22
Inventor 马菊莲周好斌徐向前袁森许庆
Owner XI'AN PETROLEUM UNIVERSITY