CN104087947B - The reference electrode system with self-calibration function in cathodic protection system - Google Patents
The reference electrode system with self-calibration function in cathodic protection system Download PDFInfo
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- CN104087947B CN104087947B CN201410353778.0A CN201410353778A CN104087947B CN 104087947 B CN104087947 B CN 104087947B CN 201410353778 A CN201410353778 A CN 201410353778A CN 104087947 B CN104087947 B CN 104087947B
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Abstract
The present invention relates to a kind of reference electrode system with self-calibration function in cathodic protection system; including A reference electrode, B reference electrode and single-chip microcomputer; A reference electrode is connected with the input of single-chip microcomputer respectively with B reference electrode, and the output module of single-chip microcomputer is connected with potentiostat；Single-chip microcomputer gathers respectively and obtains whether the protected object protected of cathodic protection system calculates the potential value needed to potentiostat output within the scope of two standards are with type reference electrode potential difference relative to A reference electrode and two potential values of B reference electrode, the difference further according to two potential values and export to potentiostat.The reference electrode system of the present invention has self-calibration function; single-chip microcomputer calculates the potential value signal to potentiostat output according to the difference of the potential value of two reference electrode bodies; it is thus possible to obtain the duty of two reference electrode bodies in time and pinpoint the problems in time, it is ensured that the normal work of cathodic protection system and protection effect thereof.
Description
Technical field
The invention belongs to the cathodic protection field of corrosion and protection, relate to a kind of reference electrode system being applied in cathodic protection system.
Background technology
Cathodic protection system is widely used as effective hardware anti-corrosion system; its by be submerged in electrolyte system the metal structures of (such as sea water, soil, fresh water etc.) by applying negatron by the way of; make metal structure be in certain limit relative to the current potential of reference electrode, thus reach anticorrosion purpose.In impressed current cathodic protection system; reference electrode plays the part of the role of basis reference within the system; once reference electrode self current potential deviation normal value; the signal of the potentiostat of fed back to cathodic protection system will be rub-out signal; whole system can be caused to lose efficacy; thus affect the anti-corrosion function of cathodic protection system, overprotection may be caused worse to cause anticorrosive coat damaged and material body hydrogen damage.
In cathodic protection system operation program, majority all requires reference electrode calibration operation; but this work can only be periodically executed; the real work state of reference electrode cannot obtain in real time, typically can only could find that after system mistake runs certain time reference electrode current potential deviates normal value.Particularly container is interior, pipeline is interior and buried reference electrode, it is impossible to directly calibrating, run duration is abnormal even by professional and technical personnel's empirical discovery reference electrode, also cannot be maintained or revise.For solving this problem, need to invent a kind of intelligent reference electrode system with self calibration, self-correction function.
Summary of the invention
It is an object of the invention to provide a kind of reference electrode system with self-calibration function.
For reaching above-mentioned purpose, the technical solution used in the present invention is:
A kind of reference electrode system with self-calibration function in cathodic protection system; including A reference electrode, B reference electrode and single-chip microcomputer; described A reference electrode with described B reference electrode respectively input with described single-chip microcomputer be connected, the output module of described single-chip microcomputer is connected with the potentiostat in cathodic protection system；
Described single-chip microcomputer gathers whether the protected object that the cathodic protection system described in acquisition protected calculates the potential value needed to described potentiostat output within the scope of two standards are with type reference electrode potential difference relative to described A reference electrode and two potential values of described B reference electrode, the difference further according to two described potential values and export to described potentiostat respectively.
Preferably, it also includes the warning indicating module being connected with described single-chip microcomputer, when the difference of two described potential values exceeds two standards with type reference electrode potential difference scope, described single-chip microcomputer is reported to the police according to described alarm signal to described warning indicating module output alarm signal, described warning indicating module.
Preferably, it also includes the display screen being connected with described single-chip microcomputer.
Preferably, it also includes the external memory storage being connected with described single-chip microcomputer.
Preferably, it also includes the communication module of the host computer being connected with described single-chip microcomputer and can being connected in described cathodic protection system.
Preferably; when the difference of two described potential values is within the scope of two standards are with type reference electrode potential difference, the potential value that described protected object is exported as needs to described potentiostat by described single-chip microcomputer relative to the potential value of described A reference electrode；When the difference of two described potential values exceeds two standards with type reference electrode potential difference scope, the potential value that described protected object is exported to described potentiostat as needs with the meansigma methods sum of the bound of type reference electrode potential difference scope by described single-chip microcomputer relative to the potential value of described B reference electrode and two standards.
Preferably, described A reference electrode is Ag/AgCl reference electrode or Cu/CuSO4Reference electrode；Described B reference electrode is high purity zinc reference electrode.
Preferably, described A reference electrode and described B reference electrode are individually installed or constitute reference electrode assembly integral installation.
Preferably, described reference electrode assembly includes described A reference electrode, described B reference electrode and inner housing, shell body, end cap；
Described A reference electrode is installed in described inner housing, and the one end of described A reference electrode is drawn by one end of described inner housing, and the other end of described inner housing offers through hole；Described B reference electrode is installed on outside described inner housing, and described shell body is sheathed on outside described B reference electrode, and one end of described B reference electrode is drawn by one end of described shell body；The one end part leading to described A reference electrode and described B reference electrode on described inner housing and described shell body respectively in the same side and is covered with described end cap, described A reference electrode and described B reference electrode by wire draw described in end cap.
Preferably, described reference electrode assembly is installed on its installation site by flange, and described flange sleeve is located at outside shell body, and its one end is fixedly connected with described installation site, and the other end is fixedly connected with described end cap.
Owing to technique scheme is used; the present invention compared with prior art has the advantage that the reference electrode system of the present invention has self-calibration function; single-chip microcomputer can calculate the potential value signal to potentiostat output according to the difference of the potential value of two reference electrode bodies; it is thus possible to obtain the duty of two reference electrode bodies in time and pinpoint the problems in time, it is ensured that the normal work of cathodic protection system and protection effect thereof.
Accompanying drawing explanation
Accompanying drawing 1 is the structural principle schematic diagram of the reference electrode system of the present invention.
Accompanying drawing 2 is that the structure of the reference electrode assembly of the reference electrode system employing of the present invention partly cuts open schematic diagram.
Accompanying drawing 3 is the operation principle logic chart of the reference electrode system of the present invention.
In the figures above: 1, A reference electrode；2, B reference electrode；3, single-chip microcomputer；4, warning indicating module；5, display screen；6, external memory storage；7, communication module；8, output module；9, potentiostat；10, inner housing；11, shell body；12, end cap；13, sealing ring；14, wire；15, body；16, lid；17, fastening bolt；18, sealing gasket；19, installation site (or protection equipment).
Detailed description of the invention
The invention will be further described for embodiment shown in below in conjunction with the accompanying drawings.
Embodiment one: see shown in accompanying drawing 1.A kind of reference electrode system with self-calibration function in cathodic protection system; use double reference electrode and the structure of single-chip microcomputer 3; concrete, it includes A reference electrode 1, B reference electrode 2, single-chip microcomputer 3, warning indicating module 4, display screen 5, external memory storage 6 and communication module 7.
A reference electrode 1 with B reference electrode 2 respectively input with the single-chip microcomputer 3 with program be connected, and the output module 8 of single-chip microcomputer 3 is connected with the potentiostat 9 in cathodic protection system.Warning indicating module 4, display screen 5, external memory storage 6 with communication module 7 the most respectively output with single-chip microcomputer 3 be connected.
In such scheme, two reference electrodes can unrestricted choice kind, need after selection to revise single-chip microcomputer 3 program accordingly.Preferably, A reference electrode 1 selects the reference electrode that degree of accuracy is high, such as Ag/AgCl reference electrode, Cu/CuSO4Reference electrodes etc., B reference electrode 2 selects stability height reference electrode, can slightly reduce precise requirements, such as high purity zinc reference electrode etc..But two reference electrodes are not limited to the type listed.
A reference electrode 1 and B reference electrode 2 can individually be installed, it is also possible to constitutes reference electrode assembly integral installation.
As shown in Figure 2, reference electrode assembly, in addition to A reference electrode 1, B reference electrode 2, also includes inner housing 10, shell body 11 and end cap 12.
Inner housing 10 is in hollow cylinder, several through holes are offered on one end face, and on another end face, offer a through hole, hollow edge, the inner side towards inner housing 10 of this through hole is referred to as the interior edge of through hole, and relative with interior edge, the outer being referred to as through hole towards the edge outside inner housing 10 of through hole.A reference electrode 1 is fixedly arranged in inner housing 10, and one end of A reference electrode 1 is extended to by through hole outside inner housing 10, so that the one end of A reference electrode 1 is drawn by one end of inner housing 10.The part being positioned in inner housing 10 on A reference electrode 1 has flange, and flange is against the interior along upper of the through hole on inner housing 10, and is provided with sealing ring 13 between flange and the interior edge of through hole.After A reference electrode 1 draws inner housing 10, connect it by a bolt and draw wire 14.
B reference electrode 2 includes the column part being sheathed on the side of inner housing 10 and is formed at the boss of one end of column part, boss is against on the outer of the through hole on inner housing 10, thus B reference electrode 2 is arranged at outside inner housing 10 so that the two is isolated between A reference electrode 1 and B reference electrode 2 by inner housing 10.
A reference electrode 1, inner housing 10 and B reference electrode 2 constitute an entirety, outside shell body 11 is sheathed on B reference electrode 2 thus be fixedly arranged on outside this entirety.Shell body 11 includes being set around the sidepiece of the overall periphery being made up of A reference electrode 1, inner housing 10 and B reference electrode 2 and is positioned at the bottom of one end of entirety, and the length being shorter in length than B reference electrode 2 of shell body 11 makes one end of B reference electrode 2 exposed.The other end of B reference electrode 2 then by be arranged in bottom on bolt and draw one end of shell body 11 and connect its wire 14.
A reference electrode 1 is drawn one end of inner housing 10 and B reference electrode 2 and is drawn one end of shell body 11 and be positioned on the same side, inner housing 10 and shell body 11 and draw that side of A reference electrode 1 and B reference electrode 2 respectively and be covered with end cap 12.Forming a cavity between end cap 12 and shell body 11 and inner housing 10, end cap 12 includes the body 15 of outer rim and the opening in cylinder and having protrusion and is screwed on the opening of body 15 lid 16 covered by opening.The wire 14 that the wire 14 that A reference electrode 1 is connected is connected with B reference electrode 2 is drawn via the perforate on the body 15 of end cap 12 and is connected with single-chip microcomputer 3 in cavity.
Above-mentioned reference electrode assembly is installed on by flange on the equipment of its required protection, i.e. its installation site 19.Flange sleeve is located at outside shell body 11, and its one end is relative with the outer rim of end cap 12, and correspondence offers that bolt hole, flange and end cap 12 are fixing by the fastening bolt 17 that is arranged in bolt hole to be connected therebetween.Sealing gasket 18 it is provided with between flange and shell body 11.And the end of flange is welded to connect in the installation site 19 of reference electrode assembly.
In such scheme, two reference electrodes can unrestricted choice kind, need after selection to revise single-chip microcomputer 3 program accordingly.Preferably, A reference electrode 1 selects the reference electrode that degree of accuracy is high, as weblike heat impregnates Ag/AgCl reference electrode, Cu/CuSO4Reference electrodes etc., B reference electrode 2 selects stability height reference electrode, can slightly reduce precise requirements, such as high purity zinc reference electrode etc..But two reference electrodes are not limited to the type listed.Inner housing 10 in the middle of two reference electrodes is polypropylene or polrvinyl chloride material, and shell body 11 is nylon material, has mechanical strength, as the support of electrode.Flange and end cap 12 are low-alloy steel.
In this reference electrode system; single-chip microcomputer 3 gathers two potential values obtaining the protected object protected of cathodic protection system relative to A reference electrode 1 and B reference electrode 2 respectively, and whether the difference further according to two potential values calculates the potential value needed to potentiostat 9 output within the scope of two standards are with type reference electrode potential difference and export to potentiostat 9.
Concrete, as shown in Figure 3, in the potential value input single-chip microcomputer 3 of two different types of reference electrodes, A reference electrode 1 is as working reference electrode, and B reference electrode 2 is as comparing reference electrode.Protected object is poor by comparison operation relative to the potential value of two reference electrodes; if the difference of two potential values is within the scope of two standards are with type reference electrode potential difference; then two reference electrodes are the most normal; now; the potential value exported to potentiostat 9 as needs relative to the potential value of A reference electrode 1 by protected object, this potential value is given potentiostat 9 by single-chip microcomputer 3.If the difference of two potential values exceeds two standards with type reference electrode potential difference scope; the potential value that protected object is exported to potentiostat 9 as needs with the meansigma methods sum of the bound of type reference electrode potential difference scope by single-chip microcomputer 3 relative to potential value and two standards of B reference electrode 2, this potential value is given potentiostat 9 by single-chip microcomputer 3.Meanwhile, single-chip microcomputer 3 carries out sound and light alarm to warning indicating module 4 output alarm signal, warning indicating module 4 according to alarm signal.
In this reference electrode system, current potential, the difference of the current potential of two reference electrodes and single-chip microcomputer 3 output that display screen 5 is measured respectively for two reference electrodes of display is to the output potential value of potentiostat 9, output is also stored to external memory storage 6 by these information simultaneously, assesses running situation for technical staff.The communication module 7 that single-chip microcomputer 3 is connected, is reserved with the interface that the host computer with cathodic protection system communicates, in case cathodic protection system industrial computer obtains information.
As a example by the local environment carbon steel piping cathodic protection system as briny environment; A reference electrode 1 uses Ag/AgCl reference electrode; B reference electrode 2 uses high purity zinc reference electrode; protected object; i.e. pipeline is separately input in single-chip microcomputer 3 relative to the current potential of A reference electrode 1 and B reference electrode 2, and single-chip microcomputer 3 is operated according to logic chart.In the present embodiment, two standards are respectively as follows: Δ E with the bound of type reference electrode potential difference scopeminFor-1.02V, Δ EmaxFor-1.06V.When pipeline relative to the difference of the potential value of A reference electrode 1 and B reference electrode 2 between-1.02 to-1.06V time, pipeline is transferred to potentiostat 9 relative to the potential value of A reference electrode 1 by output module 8.When pipeline relative to the difference of the potential value of A reference electrode 1 and B reference electrode 2 not between-1.02 to-1.06V time, by pipeline relative to the potential value of B reference electrode 2 plus-1.04V(i.e. Δ EminWith Δ EmaxAverage) be transferred to potentiostat 9 by output module 8, activate warning indicating module 4 simultaneously, and pipeline relative to the potential value of B reference electrode 2, the difference of the two, the potential value of output to potentiostat 9 relative to the potential value of A reference electrode 1, pipeline is shown to display screen 5, and is sent to these data and acquisition time in external memory storage 6 store.Single-chip microcomputer 3 connects communication module 7 in advance, with host computer communication during for needing.In system, protected object (pipeline) is as system earth.
Above-mentioned reference electrode system uses double reference electrode to coordinate single-chip microcomputer 3, and auxiliary is with program, it is possible to achieve self calibration, self-correction function.
Above-described embodiment only for technology design and the feature of the present invention are described, its object is to allow person skilled in the art will appreciate that present disclosure and to implement according to this, can not limit the scope of the invention with this.All equivalence changes made according to spirit of the invention or modification, all should contain within protection scope of the present invention.
Claims (9)
1. the reference electrode system with self-calibration function in cathodic protection system; it is characterized in that: it includes A reference electrode, B reference electrode and single-chip microcomputer; described A reference electrode with described B reference electrode respectively input with described single-chip microcomputer be connected, the output module of described single-chip microcomputer is connected with the potentiostat in cathodic protection system；
Described single-chip microcomputer gathers protected object that the cathodic protection system described in acquisition protected respectively relative to described A reference electrode and two potential values of described B reference electrode, whether the difference further according to two described potential values calculates the potential value needed to described potentiostat output within the scope of two standards are with type reference electrode potential difference and exports to described potentiostat, when the difference of two described potential values is within the scope of two standards are with type reference electrode potential difference, the potential value that described protected object is exported as needs to described potentiostat by described single-chip microcomputer relative to the potential value of described A reference electrode；When the difference of two described potential values exceeds two standards with type reference electrode potential difference scope, the potential value that described protected object is exported to described potentiostat as needs with the meansigma methods sum of the bound of type reference electrode potential difference scope by described single-chip microcomputer relative to the potential value of described B reference electrode and two standards.
The reference electrode system with self-calibration function in cathodic protection system the most according to claim 1; it is characterized in that: it also includes the warning indicating module being connected with described single-chip microcomputer; when the difference of two described potential values exceeds two standards with type reference electrode potential difference scope; described single-chip microcomputer is reported to the police according to described alarm signal to described warning indicating module output alarm signal, described warning indicating module.
The reference electrode system with self-calibration function in cathodic protection system the most according to claim 1, it is characterised in that: it also includes the display screen being connected with described single-chip microcomputer.
The reference electrode system with self-calibration function in cathodic protection system the most according to claim 1, it is characterised in that: it also includes the external memory storage being connected with described single-chip microcomputer.
The reference electrode system with self-calibration function in cathodic protection system the most according to claim 1, it is characterised in that: it also includes the communication module of the host computer being connected with described single-chip microcomputer and can being connected in described cathodic protection system.
The reference electrode system with self-calibration function in cathodic protection system the most according to claim 1, it is characterised in that: described A reference electrode is Ag/AgCl reference electrode or Cu/CuSO4Reference electrode；Described B reference electrode is high purity zinc reference electrode.
The reference electrode system with self-calibration function in cathodic protection system the most according to claim 1, it is characterised in that: described A reference electrode and described B reference electrode are individually installed or constitute reference electrode assembly integral installation.
The reference electrode system with self-calibration function in cathodic protection system the most according to claim 7, it is characterised in that: described reference electrode assembly includes described A reference electrode, described B reference electrode and inner housing, shell body, end cap；
Described A reference electrode is installed in described inner housing, and the one end of described A reference electrode is drawn by one end of described inner housing, and the other end of described inner housing offers through hole；Described B reference electrode is installed on outside described inner housing, and described shell body is sheathed on outside described B reference electrode, and one end of described B reference electrode is drawn by one end of described shell body；The one end part leading to described A reference electrode and described B reference electrode on described inner housing and described shell body respectively in the same side and is covered with described end cap, described A reference electrode and described B reference electrode by wire draw described in end cap.
The reference electrode system with self-calibration function in cathodic protection system the most according to claim 8; it is characterized in that: described reference electrode assembly is installed on its installation site by flange; described flange sleeve is located at outside shell body; its one end is fixedly connected with described installation site, and the other end is fixedly connected with described end cap.
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| CN101943655B (en) * | 2010-08-16 | 2012-02-29 | 华中科技大学 | On-line corrosion detector for reinforced concrete and method thereof |
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