CN102590459A - System and method for detecting and evaluating corrosion of buried pipeline - Google Patents
System and method for detecting and evaluating corrosion of buried pipeline Download PDFInfo
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Abstract
The invention discloses a system and a method for detecting and evaluating corrosion of a buried pipeline, and belongs to the technical field of corrosion resistance of pipelines. The system comprises on-line soil corrosion detection equipment, on-line pipeline corrosion detection equipment and a corrosion evaluation and detection system, wherein the on-line soil corrosion detection equipment is arranged in the soil around a pipeline; the on-line pipeline corrosion detection equipment is arranged on a test pile of the pipeline; and the on-line soil corrosion detection equipment and the on-line pipeline corrosion detection equipment are respectively connected with the corrosion evaluation and detection system in a wireless data communication manner. By adopting the online-detection equipment, soil and pipeline corrosion data can be acquired timely, and the corrosion evaluation and detection system comprehensively and completely analyzes the monitored data of the soil and the pipeline; and the system can completely and systematically analyze the data relevant to the corrosion of the buried pipeline and timely evaluate the corrosion situation and the residual service life of the pipeline so as to timely judge the corrosion state of the pipeline.
Description
Technical field
The present invention relates to the corrosion-proof technology for pipeline field, particularly a kind of buried pipeline corrosion detects evaluation system and method.
Background technology
Follow high speed development of national economy; The buried pipeline construction gets into Rapid development stage, and the buried pipeline total kilometrage that has been constructed and put into operation surpasses 100,000 kilometers, and corrosive pipeline perforation incident happens occasionally; Caused loss, environmental pollution and personnel's injury of oil gas water, lost huge.Adopt rational technological means, carry out corrosive pipeline assessment and pipeline predicting residual useful life, can help pipeline management department to carry out pipeline management effectively, improve efficiency of managing, accuracy and science, reduce the harm that corrosive pipeline brings.Therefore, to the corrosion assessment and the forecasting technique in life span of buried pipeline, obtained corrosion protection domain expert scholar's great attention all the time.
The present assessment with the monitoring and the numerical analysis technical elements of life prediction in the buried pipeline corrosion both at home and abroad obtained some achievements, makes a concrete analysis of as follows:
Prior art discloses the automatic monitoring and evaluation of a kind of interference corrosion of embedded metal pipeline system, and this system only disturbs the buried metal pipeline stray current and realized automatic monitoring and evaluation, does not consider the influence of other factors such as soil; For underground steel gas pipe network pipeline corrosion prediction system and some corrosion prediction devices; Also only buried steel gas pipeline residual life has been realized prediction; Pipe corrosion condition is not assessed; There are not to realize the on-line monitoring to soil and corrosive pipeline data, the basic data that can't accomplish promptly and accurately to grasp corrosive pipeline yet;
Though prior art discloses a kind of trenchless construction large-diameter pipeline corrosion controlling and monitoring system, assessment and life prediction only to the monitoring of being correlated with of trenchless construction large diameter pipeline corrosion data, are not corroded based on Monitoring Data in this system yet; Special method of testing for predicting residual service life of buried metal water supply pipeline; Prior art has only provided the algorithm based on the predicting residual service life of buried metal water supply pipeline of soil corrosion rate galvanochemistry model; Realized predicting residual useful life; Pipe corrosion condition is not assessed, do not considered to set up on-line monitoring yet soil and corrosive pipeline data.
In sum; Though prior art, has realized pipe corrosion condition assessment or predicting residual useful life all from certain aspect, what should be noted that is; Soil corrosion data and corrosive pipeline data are followed the time to change and are changed; Cause the factor of these variations to comprise season, environment, human factor, later maintenance etc., the variation of soil and pipeline, oil product storage tank corrosion data is with the assessment and the predicting residual useful life that influence pipeline and storage tank corrosion condition; Good comprehensive is analyzed soil corrosion and pipeline, storage tank corrosion detect data and prior art is all failed; Comprehensively estimate and predict, the analysis result that makes these technology of employing draw exist occur than large deviation maybe, thereby influence the effect of these technological practical applications.
Summary of the invention
Be to solve the problems referred to above that exist in the prior art, the invention provides a kind of collections in time, data are accurately and reliably to buried pipeline corrosion detection evaluation system and method.
The invention provides a kind of buried pipeline corrosion and detect evaluation system, comprising: the online corrosion checkout equipment of soil, the online corrosion checkout equipment of pipeline and corrosion evaluating system; Wherein, The online corrosion checkout equipment of said soil is installed in the soil around the pipeline; The online corrosion checkout equipment of said pipeline is installed on the detective pole of said pipeline, and the online corrosion checkout equipment of said soil links to each other through the wireless data communication mode with said corrosion evaluating system respectively with the online corrosion checkout equipment of said pipeline.
In such scheme, said wireless data communication mode is wherein any one of TD-SCDMA, CDMA2000, WCDMA, WiMAX, CDMA or GPRS.
In such scheme, the online corrosion checkout equipment of said soil comprises soil corrosion probe, signal acquisition process unit, public wireless data communication unit, data storage cell and antenna; Wherein, said signal acquisition process unit links to each other with said data storage cell with said soil corrosion probe respectively, and said signal acquisition process unit links to each other with said corrosion evaluating system with said antenna through said public wireless data communication unit.
In such scheme, the data of the online corrosion checkout equipment of said soil collection comprise potential of hydrogen, resistivity, humidity, salt content and the ORP of said buried pipeline place soil.
In such scheme, the online corrosion checkout equipment of said pipeline comprises polarization probe, signal acquisition process unit, public wireless data communication unit, data storage cell and antenna; Wherein, said signal acquisition process unit links to each other with said data storage cell with said polarization probe respectively, and said signal acquisition process unit links to each other with said corrosion evaluating system with said antenna through said public wireless data communication unit.
In such scheme, the data of the online corrosion checkout equipment of said pipeline collection comprise protection potential, spontaneous potential, anticorrosive coat resistivity and the stray current of said buried pipeline.
In such scheme; Said corrosion evaluating system comprises application module, data transmission module and database; Wherein, Said application module links to each other with said database through data-interface, and said database links to each other through data-interface with said data transmission module, and said data transmission module links to each other with the online corrosion checkout equipment of said pipeline with the online corrosion checkout equipment of said soil respectively.
In such scheme, said application module comprises System Management Unit, monitoring equipment administrative unit, Back ground Information administrative unit, statistical query administrative unit, corrosion assessment administrative unit, life prediction administrative unit and daily management unit; Wherein, said System Management Unit, said monitoring equipment administrative unit, said Back ground Information administrative unit, said statistical query administrative unit, said corrosion assessment administrative unit, said life prediction administrative unit link to each other with said database through data-interface respectively with said daily management unit.
The present invention also provides a kind of buried pipeline corrosion to detect evaluation method, and said method comprises: the grading evaluation standard of confirming corrosive pipeline situation and pipeline place soil corrosion situation; The data of respectively data and the online corrosion checkout equipment of pipeline of the online corrosion checkout equipment collection of soil being gathered are confirmed the corrosion weight; The data that data of gathering according to the online corrosion checkout equipment of said soil and the online corrosion checkout equipment of said pipeline are gathered with and said corrosion weight, according to the grade of the said grading evaluation standard rating pipe corrosion condition of correspondence.
Further, the method for the corrosion weight of the online corrosion checkout equipment of said definite pipeline image data is an analytical hierarchy process, and the method for the corrosion weight of the online corrosion checkout equipment of said definite soil image data is a gray relative analysis method.
The present invention adopts online detection instrument, and timely collection soil and corrosive pipeline data are through the Monitoring Data of corrosion comprehensive multianalysis soil of evaluating system and pipeline; Systematically analyze the related data of corroding comprehensively, the corrosion situation and the residual life of pipeline are made timely evaluation, in time the corrosion condition of pipeline is made judgement with buried pipeline; Analyze corrosion condition and residual life more exactly,, carry out prevention work for the safe operation of pipeline provides foundation; Avoid causing enormous economic loss; Accomplish that simultaneously security and economy rationally take into account, guarantee to prolong the serviceable life of pipeline to greatest extent under the prerequisite of reliability.
Description of drawings
Fig. 1 is that a kind of buried pipeline corrosion that instance of the present invention provides detects the evaluation system schematic diagram;
Fig. 2 is the theory diagram of a kind of soil on-line corrosion monitoring appearance of providing of instance of the present invention;
Fig. 3 is the theory diagram of a kind of pipeline corrosion online monitor of providing of instance of the present invention;
Fig. 4 is a kind of theory diagram that corrodes evaluating system that instance of the present invention provides.
Reference numeral:
1, computing machine; 2, public network broadband communications circuit; 3, internet;
4, soil on-line corrosion monitoring appearance; 6, pipeline corrosion online monitor;
8, public wireless data communication network; 9, the antenna of soil on-line corrosion monitoring appearance;
10, the public wireless data communication unit of soil on-line corrosion monitoring appearance;
11, the signal acquisition process unit of soil on-line corrosion monitoring appearance;
12, the data storage cell of soil on-line corrosion monitoring appearance;
13, soil corrosion probe; 14, waterproof case;
15, the antenna of pipeline corrosion online monitor;
16, the public wireless data communication unit of pipeline corrosion online monitor;
17, the signal acquisition process unit of pipeline corrosion online monitor;
18, the data storage cell of pipeline corrosion online monitor;
19, the polarization of pipeline corrosion online monitor probe; 21, System Management Unit;
22, monitoring equipment administrative unit; 23, Back ground Information administrative unit;
24, statistical query administrative unit; 25, corrosion assessment administrative unit;
26, life prediction administrative unit;
27, daily management unit; 28, application module;
29, data transmission module; 30, database.
Embodiment
Below in conjunction with embodiment the present invention is further described in detail, the embodiment that provides has been merely and has illustrated the present invention, rather than in order to limit scope of the present invention.
Below in conjunction with accompanying drawing and embodiment, the present invention is elaborated as follows:
The buried pipeline corrosion of the buried pipeline of certain station being used present embodiment detects the evaluation system system, and device therefor is as shown in table 1 below in the system:
Table 1
As shown in Figure 1, the embodiment of the invention provides a kind of buried pipeline corrosion to detect evaluation system, and this system comprises: soil on-line corrosion monitoring appearance 4, pipeline corrosion online monitor 6 and corrosion evaluating system; Wherein, Soil on-line corrosion monitoring appearance 4 is installed in the soil around the pipeline; Pipeline corrosion online monitor 6 is installed on the detective pole of pipeline; Soil on-line corrosion monitoring appearance 4 and pipeline corrosion online monitor 6 link to each other through the wireless data communication mode with the corrosion evaluating system respectively, and the wireless data communication mode can be wherein any one of TD-SCDMA, CDMA2000, WCDMA, WiMAX, CDMA or GPRS.
Wherein, soil on-line corrosion monitoring appearance 4 comprises soil corrosion probe 13, public wireless data communication unit 10, signal acquisition process unit 11, data storage cell 12 and antenna 9, and is as shown in Figure 2.In addition, also can add waterproof case 14, waterproof case 14 can effectively be avoided rainwater in the soil or other infiltrations influence to each communication unit.The soil on-line corrosion monitoring appearance main frame that public wireless data communication unit 10, signal acquisition process unit 11 and data storage cell 12 are formed is put into detective pole; Wherein, Signal acquisition process unit 11 links to each other with data storage cell 12 with soil corrosion probe 13 respectively, and signal acquisition process unit 11 links to each other with the corrosion evaluating system with antenna 9 through public wireless data communication unit 10.Antenna 9 is fixed on outside the detective pole, and the cable of antenna 9 is connected with soil on-line corrosion monitoring appearance main frame, and carries out water-proofing treatment; Imbed soil corrosion probe 13 underground; The cable of soil corrosion probe 13 is connected with soil on-line corrosion monitoring appearance main frame, and carries out water-proofing treatment.
Wherein, corrosive pipeline on-line monitoring appearance 6 comprises polarization probe 19, antenna 15, public wireless data communication unit 16, signal acquisition process unit 17 and data storage cell 18, and is as shown in Figure 3.The pipeline corrosion online monitor main frame that public wireless data communication unit 16, signal acquisition process unit 17 and data storage cell 18 are formed is put into detective pole; And signal acquisition process unit 17 linked to each other with data storage cell 18 with polarization probe 19 respectively, signal acquisition process unit 17 passes through public wireless data communication unit 16 and antenna 15 and corrodes evaluating system and link to each other.Antenna 15 is fixed on outside the detective pole; The cable of antenna 15 is connected with the pipeline corrosion online monitor main frame, and carries out water-proofing treatment; The probe 19 that will polarize is imbedded underground, and buried depth and pipeline etc. are dark; The cable of polarization probe 19 is connected with the pipeline corrosion online monitor main frame, and carries out water-proofing treatment.
Wherein, the corrosion evaluating system comprises application module 28, data transmission module 29 and database 30, and is as shown in Figure 4.Application module 28 links to each other with database 30 through data-interface, and data transmission module 29 links to each other respectively with pipeline corrosion online monitor 6 with soil on-line corrosion monitoring appearance 4, and database 30 and data transmission module 29 link to each other through data-interface.Application module 28 comprises System Management Unit 21, monitoring equipment administrative unit 22, Back ground Information administrative unit 23, statistical query administrative unit 24, corrosion assessment administrative unit 25, life prediction administrative unit 26 and daily management unit 27.System Management Unit 21, monitoring equipment administrative unit 22, Back ground Information administrative unit 23, statistical query administrative unit 24, corrosion assessment administrative unit 25, life prediction administrative unit 26 link to each other with database 30 through data-interface respectively with daily management unit 27.
The principle of work that the buried pipeline corrosion that present embodiment provides detects evaluation system is: at first; The signal that the signal acquisition process unit 11 collection soil corrosion probes 13 of soil on-line corrosion monitoring appearance 4 are measured, and with the data storage of gathering in data storage cell 12, after storage is accomplished; Signal acquisition process unit 11 is through public wireless data communication unit 10 and antenna 9; Data are sent with the public wireless data communication method, get into internet 3, the public network broadband communications circuit 2 of IP is transferred in the computing machine 1 data through binding fixedly; To lose and be embedded in the evaluating system in the computing machine 1, both carry out computing then.In the present embodiment, soil on-line corrosion monitoring appearance is monitored near the soil corrosion sexual factor value of consult volume station in real time, chooses 7 monitoring points, and Monitoring Data is as shown in table 2 below.
Table 2
Secondly; The signal that polarization probe 19 is measured is gathered in the signal acquisition process unit 17 of pipeline corrosion online monitor 6, and with the data storage of gathering in data storage cell 18, after storage is accomplished; Signal acquisition process unit 17 is through public wireless data communication unit 16 and antenna 15; Data are sent with the public wireless data communication method, get into internet 3, the public network broadband communications circuit 2 of IP is transferred in the computing machine 1 data through binding fixedly.In the present embodiment, the corrosion parameter of pipeline corrosion online monitor monitoring station interior conduit is chosen 7 monitoring points, and Monitoring Data is as shown in table 3 below.
Table 3
In addition; Soil on-line corrosion monitoring appearance 4 all has data storage function with pipeline corrosion online monitor 6; When carrying out data transmission with the public wireless data communication method, if bust this, with automatically will be not the data storage of normal uploading in data storage cell 12 and 18 separately; Treat the public wireless data communication recover normal after, with the data do not uploaded of automatic transmitting and storing in data storage cell 12 and 18 separately.
Then, the public network broadband communications circuit 2 of IP is connected on the computing machine 1 with binding fixedly.When computing machine 1 starts; Database 30 can move with data transmission module 29 automatically; Data transmission module 29 is responsible for the data of automatic reception soil on-line corrosion monitoring appearance 4 and pipeline corrosion online monitor 6 transmissions; The data of soil on-line corrosion monitoring appearance 4 and pipeline corrosion online monitor 6; With the public wireless data communication method; The public network broadband communications circuit 2 of IP is transferred in the computing machine 1 with binding fixedly through public wireless data communication network 8, Installation of W indows Server 2008 operating systems and SQLServer 2008 databases on server, and system operators is carried out statistical study through the online corrosion evaluating system of buried pipeline to data then.
At last, the evaluation method of corrosion evaluating system is: the grading evaluation standard of at first confirming corrosive pipeline situation and pipeline place soil corrosion situation; Secondly; The data of respectively data and the pipeline corrosion online monitor of the collection of soil on-line corrosion monitoring appearance being gathered are confirmed the corrosion weight; In the present embodiment; Respectively potential of hydrogen, resistivity, humidity, salt content and the ORP of buried pipeline place soil and protection potential, spontaneous potential, anticorrosive coat resistivity and 9 factors of stray current of buried pipeline are corroded weight assignment; Wherein, confirm that the method for the corrosion weight of pipeline corrosion online monitor image data is an analytical hierarchy process, confirm that the method for the corrosion weight of soil on-line corrosion monitoring appearance image data is a gray relative analysis method; At last, the data that the data that comprehensive soil on-line corrosion monitoring appearance is gathered and pipeline corrosion online monitor are gathered with and corrode weight, according to the grade of the grading evaluation standard rating pipe corrosion condition of correspondence.
Concrete evaluating method is following:
The first, confirm evaluation set
Through choosing the principal element that influences the imbedded steel pipe corrosion situation, adopt the secondary fuzzy evaluation theoretical, set up imbedded steel pipe corrosion protection evaluation model.
At first, confirm evaluation set.In first order evaluation set, use V
1=(v
1, v
2, v
3, v
4)=(is intact, and be better relatively poor, danger) expression Corrosion of Pipeline protection situation grade; In the evaluation set of the second level, with soil corrosivity evaluation set V
21=(v
1, v
2, v
3, v
4A little less than)=(, a little less than, stronger, strong) influence degree of expression soil corrosivity.
Secondly, confirm the grading evaluation standard.Because the size of each influence factor has direct influence to evaluation result, therefore, must carry out classification to each influence factor size according to certain standard, be beneficial to the Fuzzy processing of each influence factor and accurately evaluation.
The second, confirm weight
The first order has 4 influence factors, i.e. protection potential, spontaneous potential, anticorrosive coat resistivity and stray current are with weight sets A=(a
1, a
2, a
3, a
4) expression, adopt analytical hierarchy process (AHP) to confirm each weight size.At first, the relative importance of each each factor of level is made judgement through expertise, with numerical value 1,2,3 ... 9 and their inverse represent the relative importance that contrasts between the factor in twos, construct judgment matrix with this; Then, calculate the maximum characteristic root λ of judgment matrix
MaxCorresponding regular characteristic vector W, its component W
iBe the weighted value of corresponding factor; At last, check the consistance of judgment matrix, promptly when CR＜0.1, have satisfied consistance, otherwise need adjust judgment matrix through the ratio of the consistance at random CR value of calculating judgment matrix.
The second level is for influencing 5 sub-factors of soil corrosivity, i.e. the potential of hydrogen of soil, resistivity, humidity, salt content and ORP are with weight sets A=(a
1, a
2..., a
5) expression, consider of the influence of the difference of different regions soil environment to each factor weight, the method for avoiding simultaneously having subjective quality is confirmed weighted value, adopts gray relative analysis method to confirm each weight size.In practical application, be the system features sequence X with the corrosion rate
0=x
0(k) (k=1,2 ..., n), the correlative factor sequence X
i=x
i(k) (k=1,2 ..., n; I=1,2 ..., 5) respectively representative influence 5 sub-factors of soil corrosivity, each measured data substitution grey incidence coefficient and grey relational grade computing formula:
R (x in the formula
o(k), x
i(k))-X
iWith X
0The correlation coefficient of ordering at k;
R (X
0, X
i)-X
iWith X
0Grey relational grade;
Can get thus, each factor is to the grey relational grade value γ (X of corrosion rate
0, X
i), promptly each factor is to the influence degree of soil corrosivity size.The degree of association is carried out normalization handle, can get weight sets A=(a
1, a
2..., a
5), wherein:
Three, the single factor evaluation matrix confirms
Single factor evaluation matrix R confirms, adopts Subordinate Function.μ
Vj(x) (j=1,2,3,4) are subordinate function, and the different influence factor of its value representation is under the jurisdiction of the degree of comment vj, i.e. the value of degree of membership on [0,1].The subordinate function expression formula is:
Four, evaluation result
Choose fuzzy operator M (● ,+), calculate evaluation set B=A zero R=(b
1, b
2, b
3, b
4), b wherein
j=a
1r
1j+ a
2r
2j+ a
3r
3j+ a
4r
4j(j=1,2,3,4).According to maximum membership grade principle, by the b of maximum
jBe worth pairing opinion rating vj and evaluate Corrosion of Pipeline protection situation.
In order accurately to estimate Corrosion of Pipeline protection situation, the method that adopts centesimal system to keep the score to each comment is usually carried out quantification treatment, i.e. 60≤c
1＜70 (intact), 70≤c
2＜80 (better), 80≤c
3＜90 (relatively poor), 90≤c
4＜100 (danger), thus the branch number vector C=(c of comment obtained
1, c
2, c
3, c
4).Count the score thus:
Because each comment must be divided into an interval, therefore, through calculating the high, medium and low score S of comment
h, S
m, S
l, with their mean value S
jAs the foundation of estimating the pipeline corrosion protection situation, that is:
(k＝h，m，l)
H in the formula, m, l-comment high, medium and low
c
HiThe comment of-interval upper limit composition is divided number vector, c
Hi=(69,79,89,100)
c
MiThe comment of-interval intermediate vector composition is divided number vector, c
Mi=(65,75,85,95)
c
LiThe comment of-interval lower limit composition is divided number vector, c
Li=(60,70,80,90)
At last, by the S that calculates
jComment corresponding between the value location has obtained a group analysis result of the corrosion assessment and the residual life evaluation and test of pipe under test, like following table 4 as the foundation of evaluating the pipeline corrosion protection situation.
Table 4
| Pipeline section | The corrosion point value of evaluation | Opinion rating | Residual life (year) |
| 1 | 78.3234 | Better | 18.5 |
| 2 | 74.0186 | Better | 23.4 |
| 3 | 71.8883 | Better | 28.7 |
| 4 | 88.032 | Relatively poor | 14.3 |
| 5 | 86.8963 | Relatively poor | 16.1 |
| 6 | 71.0022 | Better | 26.4 |
| 7 | 72.7377 | Better | 24.7 |
In pipe excavation detected, the remaining wall thickness of the pipeline that records was as shown in table 5 below.
Table 5
| |
1 | 2 | 3 | 4 | 5 | 6 | 7 |
| Original wall thickness (mm) | 10 | 10 | 10 | 12 | 12 | 8 | 8 |
| Remaining wall thickness (mm) | 9.22 | 9.47 | 9.68 | 11.07 | 11.21 | 7.55 | 7.46 |
Record remaining wall thickness by the comparative evaluation result of table 4 and table 5 actual and can find out that the evaluation result accuracy rate that the buried pipeline corrosion of the embodiment of the invention detects evaluation system is high.
The present invention gathers pipeline surrounding soil corrosivity data and pipeline corrosion protection data automatically; Through the mode of public wireless data communication, the data of gathering are uploaded to system manage ment computer automatically, through online corrosion assessment of buried pipeline and life-span evaluating system; The user can in time grasp the corrosive pipeline relevant information; The corrosive pipeline situation is assessed, and corrosive pipeline is carried out life prediction, can analyze corrosion condition and residual life more accurately.
The above only is preferred embodiment of the present invention, so all equivalences of doing according to the described structure of patent claim of the present invention, characteristic and principle change or modify, includes in patent claim of the present invention.
It should be noted last that; Above embodiment is only unrestricted in order to technical scheme of the present invention to be described; Although with reference to instance the present invention is specified, those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement technical scheme of the present invention; And not breaking away from the spirit and the scope of technical scheme of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (10)
1. a buried pipeline corrosion detects evaluation system, it is characterized in that, comprising: the online corrosion checkout equipment of soil, the online corrosion checkout equipment of pipeline and corrosion evaluating system; Wherein, The online corrosion checkout equipment of said soil is installed in the soil around the pipeline; The online corrosion checkout equipment of said pipeline is installed on the detective pole of said pipeline, and the online corrosion checkout equipment of said soil links to each other through the wireless data communication mode with said corrosion evaluating system respectively with the online corrosion checkout equipment of said pipeline.
2. system according to claim 1 is characterized in that, said wireless data communication mode is wherein any one of TD-SCDMA, CDMA2000, WCDMA, WiMAX, CDMA or GPRS.
3. system according to claim 1 is characterized in that, the online corrosion checkout equipment of said soil comprises soil corrosion probe, signal acquisition process unit, public wireless data communication unit, data storage cell and antenna; Wherein, said signal acquisition process unit links to each other with said data storage cell with said soil corrosion probe respectively, and said signal acquisition process unit links to each other with said corrosion evaluating system with said antenna through said public wireless data communication unit.
4. system according to claim 3 is characterized in that, the data of the online corrosion checkout equipment of said soil collection comprise potential of hydrogen, resistivity, humidity, salt content and the ORP of said buried pipeline place soil.
5. system according to claim 1 is characterized in that, the online corrosion checkout equipment of said pipeline comprises polarization probe, signal acquisition process unit, public wireless data communication unit, data storage cell and antenna; Wherein, said signal acquisition process unit links to each other with said data storage cell with said polarization probe respectively, and said signal acquisition process unit links to each other with said corrosion evaluating system with said antenna through said public wireless data communication unit.
6. system according to claim 5 is characterized in that, the data of the online corrosion checkout equipment of said pipeline collection comprise protection potential, spontaneous potential, anticorrosive coat resistivity and the stray current of said buried pipeline.
7. system according to claim 1 is characterized in that, said corrosion evaluating system comprises application module, data transmission module and database; Wherein, Said application module links to each other with said database through data-interface; Said database links to each other through data-interface with said data transmission module, and said data transmission module part links to each other with the online corrosion checkout equipment of said pipeline with the online corrosion checkout equipment of said soil respectively.
8. system according to claim 7; It is characterized in that said application module comprises System Management Unit, monitoring equipment administrative unit, Back ground Information administrative unit, statistical query administrative unit, corrosion assessment administrative unit, life prediction administrative unit and daily management unit; Wherein, said System Management Unit, said monitoring equipment administrative unit, said Back ground Information administrative unit, said statistical query administrative unit, said corrosion assessment administrative unit, said life prediction administrative unit link to each other with said database through data-interface respectively with said daily management unit.
9. a buried pipeline corrosion detects evaluation method, it is characterized in that said method comprises: the grading evaluation standard of confirming corrosive pipeline situation and pipeline place soil corrosion situation; The data of respectively data and the online corrosion checkout equipment of pipeline of the online corrosion checkout equipment collection of soil being gathered are confirmed the corrosion weight; The data that data of gathering according to the online corrosion checkout equipment of said soil and the online corrosion checkout equipment of said pipeline are gathered with and said corrosion weight, according to the grade of the said grading evaluation standard rating pipe corrosion condition of correspondence.
10. method according to claim 9; It is characterized in that; The method of the corrosion weight of the online corrosion checkout equipment of said definite pipeline image data is an analytical hierarchy process, and the method for the corrosion weight of the online corrosion checkout equipment of said definite soil image data is a gray relative analysis method.
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