Specific embodiment
The invention will be further described with the following Examples.
Referring to Fig. 1, Fig. 2, the plasma spraying equipment of the present embodiment, with anhydrous tripping protection system, is cut including raw material supplyDisconnected device 1, cooling water supply fault inductor 2 and controller 3, described raw material supply cutter 1, cooling water supply fault inductor2 are all connected with controller 3；When described cooling water supply fault inductor 2 detects cooling water supply and breaks down, to controller3 transmission induction informations, described controller 3 generates according to induction information to cut off instruction and supply cutter 1 to raw material and sends cut-outInstruction, described raw material supply cutter 1 cuts off to raw material feed path according to cut-out instruction.
Preferably, described raw material supply cutter 1 is solenoid valve block.
Preferably, described cooling water supply fault inductor 2 includes water flux gather module.
The above embodiment of the present invention can automatically cut off raw material supply when system cooling water supply goes wrong, and spray gun is risenThe waste that it also avoid raw material while acting on to protection.
Preferably, the anhydrous tripping protection system of described plasma spraying equipment also includes being coated with for monitoring plasma sprayThe fault monitor 4 of the course of work of standby and its protection system, described fault monitor 4 includes data acquisition module 41, monitoringModel building module 42, test signal statistical characteristic value computing module 43, breakdown judge module 44, malfunction coefficient module 45 and reportAlert module 46.
This preferred embodiment sets up module 42, breakdown judge module 44 and malfunction coefficient module by arranging monitoring model45, can fast and effeciently find the abnormality of the course of work appearance of plasma spraying equipment and its protection system, and knowIt is not out of order generation position or time, monitoring capability relatively is higher, simultaneously less to the assumed condition of semaphore request.
Preferably, described data acquisition module 41 includes pre-acquired submodule, rear collection submodule data correction submoduleBlock, described pre-acquired submodule is used for gathering in advance under plasma spraying equipment and its course of work normal condition of protection systemOne group of failure free time sequence signal data, described rear acquisition module is used for gathering plasma spraying equipment and its protection systemThe course of work one group of testing time sequence signal data, described data correction submodule be mainly used in revise pre-acquired submoduleThe error that block and rear collection submodule cause in data acquisition, obtains correct time sequence signal data, described mistakeDifference includes the accidental error producing in gatherer process and collecting device is operated in the systematic error produce under non-standard working conditions, itsIn, eliminating, systematic error is eliminated by determining modifying factor, right for method that accidental error is averaged by multi collectMultiple measurement data x before revisingb1、xb2、xb3, revised data x is expressed as：
In formula, Γ0For standard acquisition temperature, Γ is environment temperature during actual measurement, Φ0For standard gas production pressure, Φ is realityAir pressure during measurement.
This preferred embodiment arranges data correction submodule, can effectively eliminate the error producing in data acquisition.
Preferably, described monitoring model set up module 42 for set up malfunction monitoring model based on control figure, including nothingFault statistics characteristic quantity calculates submodule and control figure setting up submodule, specially：
(1) fault-free statistical characteristic value calculating sub module, its nothing pre-acquired submodule being collected with recurrence plotsFault time sequence signal data is analyzed processing and calculate the statistical characteristic value of correlation, if described failure free time sequence letterNumber is { x1,x2,…,xn, therefrom select k fault-free signal, the corresponding recurrence plot of k fault-free signal is DY={ Y1,Y2,…Yk, define basic recurrence plot matrixBasic recurrence plot matrixIn each elementValue modelEnclose for [0,1], the corresponding recurrence plot of remaining failure free time sequence signal data is Dy={ Yk,Yk+1,…Yn, set up without reasonBarrier statistical characteristic value FWComputing formula be：
In formula, Dy(i, j) is recurrence plot DyIn element, T (i, j) be set the threshold value corresponding to (i, j) position, T(i, j) ∈ [0.8,1], I (x) are indicator function, x=(D hereiny(i,j)-Yk(i,j))2- T (i, j), works as x<When 0, I (x)=0, when x >=0, I (x)=1；
(2) control figure setting up submodule, for setting up mean value-range chart based on statistical characteristic value and calculating flatThe upper control limit UCL of mean-range chart and lower control limit LCL, including the statistical characteristic value processing unit being sequentially connected andControl limit computing unit；Described statistical characteristic value processing unit is used for fault-free statistical characteristic value FWProcessed to generate obedienceThe sample set average order arrangement collection of normal distributionWith fault-free statistical characteristic value F during processWBased on data, using exhaustionIt is n that method generates multiple sample sizescNew samples collection and calculate corresponding new samples collection average, wherein nc<N-k, if total m newSample set average, m new samples collection average is by putting in order respectively from small to largeThen sample set average order arrangement collectionDescribed control limit calculates singleUnit is used for calculating described upper control limit UCL and lower control limit LCL, setting level of significance α during calculating, α ∈ (0,0.003], according to new probability formulaAnd PSFW<LCL=α 2 be calculated upper control limit UCL and underControl limit LCL；
Described test signal statistical characteristic value computing module 43 gathers, after being used for calculating, the testing time that submodule collectsThe statistical characteristic value of sequence signal data, if the corresponding recurrence plot of testing time sequence signal data is DH={ H1,H2,…Hl,Set up the statistical characteristic value of testing time sequence signal dataComputing formula be：
Because the correlation between the course of work information of plasma spraying equipment and its protection system is represented by recurrenceCorrelation between figure and recurrence plot, this preferred embodiment establishes fault-free statistical characteristic value FWComputing formula and test whenBetween sequence signal data statistical characteristic valueComputing formula, the statistical characteristic value calculating effectively characterizes difference and passsReturn the correlation between figure, using this correlation, and set up mean value-range chart to monitor described testing time sequenceSignal data is it is achieved that the exception monitoring of the course of work of microstructure of plasma sprayed equipment and its protection system and fault diagnosis.
Preferably, described breakdown judge module 44 by being set up the mean value-range chart of module foundation by control figureTo monitor described testing time sequence signal data, and whether judge the course of work of plasma spraying equipment and its protection systemIt is in fault, including preliminary judging submodule and fault determination sub-module：
Described preliminary judging submodule is used for preliminary judgement and whether there is fault, and setting up preliminary breakdown judge rule is：IfOrβ ∈ [0.002,0.004], then tentatively judge that test signal is abnormalSignal；IfThen test signal be normal signal, judge plasma spraying equipment andThe course of work of its protection system is in normal condition；
Described fault determination sub-module is used to determine whether fault, ifOrThen determine and surveyTrial signal is abnormal signal, judges that plasma spraying equipment and its course of work of protection system are in malfunction.
Breakdown judge module 44 is divided into preliminary judging submodule and fault determination sub-module by this preferred embodiment, is equivalent toSet up buffering area, be easy to people and pinpoint the problems early.
Preferably, described malfunction coefficient module 45 is used for judging abnormal signal segment to occur, including successively in abnormal signalThe first vegetarian refreshments screening submodule connecting and fault section detection submodule；Described unit vegetarian refreshments screening submodule is used for meeting (Dy(i, j)-Yki, filters out the abnormal first vegetarian refreshments of representation signal removing and leads because of random noise in first vegetarian refreshments of j2-Ti, j >=0Cause abnormal first vegetarian refreshments, retain all during screeningFirst vegetarian refreshments, by remaining elementPoint is entered as 0, obtains new recursion matrixDefine degree of communication threshold value Tμ, calculate recursion matrixIn all non-zero unit vegetarian refreshmentsBetween degree of communication μ (i, j), if its degree of communication μ (i, j)<Tμ, then this yuan of vegetarian refreshments be entered as 0, if its degree of communication μ (i, j) >=Tμ,Then retain, finally give new recurrence plot matrix
Described fault section detection submodule is used for being screened searching in the abnormal signal after submodule is processed by first vegetarian refreshmentsGo out abnormal signal segment, during searching, obtain recurrence plot matrixIn non-zero unit vegetarian refreshments coordinate information, extracting may characterization failureAll regions of characteristic information, set up recurrence plot matrixMiddle region QxDecision condition for true fault region is：
N[Point(i,j)]≥Tε
And(i,j)∈Qx, max (i)=max (j), min (i)=min (j)
Wherein, N [Point (i, j)] represents the quantity of first vegetarian refreshments Point (i, j), TεFor the recurrence plot matrix settingInThe threshold value of non-zero element point quantity.
This preferred embodiment setting breakdown judge module 44 and malfunction coefficient module 45, can be in unknown any plasma sprayingIn the case of the course of work priori of equipment and its protection system, fast and effeciently find plasma spraying equipment and its guarantorThe abnormality that the course of work of protecting system occurs, and identify be out of order generation position or time, monitoring capability relatively is higher.
Preferably, described alarm module 46 is made up of alarm and trigger switch, is connected with breakdown judge module 44, describedAlarm includes alarm bell and warning lamp, and when breakdown judge module 44 tentatively judges signal condition for fault, alarm bell sends alarm,Warning lamp flashes, and when breakdown judge module 44 determines that signal condition is fault, alarm bell sends alarm, and warning lamp flashes, triggeringSwitch triggering electric brake is cut off the electricity supply, and described alarm module 46 is also equipped with information Store and communication function, can send out warning messageGive operating personnel.
This preferred embodiment arranges alarm module 46, can pinpoint the problems early, it is to avoid cause bigger loss.
Finally it should be noted that above example is only in order to illustrating technical scheme, rather than the present invention is protectedThe restriction of shield scope, although having made to explain to the present invention with reference to preferred embodiment, those of ordinary skill in the art shouldWork as understanding, technical scheme can be modified or equivalent, without deviating from the reality of technical solution of the present inventionMatter and scope.