CN103394795A - Method for adaptively detecting periodic phases of double-pulse welding current waveforms - Google Patents
Method for adaptively detecting periodic phases of double-pulse welding current waveforms Download PDFInfo
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Abstract
The invention discloses a method for adaptively detecting periodic phases of double-pulse welding current waveforms. The method includes steps of acquiring current signals I in a double-pulse welding procedure; estimating a local-area time range according to an average value of the current signals I and standard deviation of the average value; computing an average current value of each point of the current signals I in the local-area time range and forming a current local-area average value sequence; judging a high-power pulse group phase and a low-power pulse group phase of each point of the current local-area average value sequence to obtain a group phase mark sequence; correcting each group jumping edge in group phase marks; marking periodic phases of all the signal points within a range of each group on the basis of the group phase mark sequence. The method for adaptively detecting the periodic phases of the double-pulse welding current waveforms has the advantages that the periodic phase marks can be accurately detected for double-pulse welding in various modulation modes, and a foundation is laid for analyzing and processing the signals in follow-up procedures.
Description
Technical field
The present invention relates to a kind of automatic testing method of arc welding, the self-adapting detecting method in especially a kind of dipulse weldering current waveform phase of the cycles, belong to the arc welding detection field.
Background technology
Along with the extensive use of arc welding, the performance of Arc Welding Power is good and bad, becomes one of key point that affects industrial product quality.Make a general survey of CO
2The multiple welding methods such as weldering, single impulse welding, dipulse weldering, the performance of Arc Welding Power is all very important, has influence on the quality, efficiency of welding so that cost.Therefore, the test and appraisal of Arc Welding Power performance seemed particularly important.This mainly detects to realize by the voltage and current signal to Arc Welding Power output.And to carry out deep detection analysis, prerequisite step is to want mark voltage or the residing phase of the cycles of each signaling point of current waveform.
Dipulse weldering is with low-frequency pulse, peak point current and the time to peak of the higher droplet transfer pulse of frequency to be modulated, the intensity that makes unit pulse strong and weak between the switching of low-frequency cycle property, obtain periodically variable strong, weak impulse train; When realizing beautiful fish scale-shaped weld appearance, guarantee higher welding efficiency, can also reduce the pore incidence, the refinement weld grain.
What the dipulse weldering was controlled is welding current, and phase of the cycles information, lie in current waveform.Each sampled point of welding current, may be in flash different mountain value stage, flash group base value stage, weak pulse to rush one of different mountain value stage and weak four phases of the cycles of impulse train base value stage.Only have the accurate phase of the cycles of having distinguished, just may further calculate a series of characteristic parameters such as flash different mountain value mean value, flash different mountain value time average.
Yet, because dipulse is welded with Different Modulations, as change peak current level, change the background current size, change high-frequency impulse dutycycle, realized gradual conversion etc. between flash group and weak impulse train, even if fixing a kind of form, its parameter is also adjustable, therefore dipulse weldering current waveform is carried out the division in the phase of the cycles comparatively difficult, and this causes impact largely to follow-up signal analysis and processing.For example, the inaccurate division in the phase of the cycles, can cause the larger error of a series of characteristic parameters such as flash different mountain value mean value, flash different mountain value time average.
Summary of the invention
The objective of the invention is in order to solve the defect of above-mentioned prior art, the self-adapting detecting method in a kind of dipulse weldering current waveform phase of the cycles is provided, the method is for the dipulse weldering of Different Modulations, all can detect comparatively exactly its phase of the cycles mark, for follow-up signal analysis and processing lays the foundation.
Purpose of the present invention can reach by taking following technical scheme:
The self-adapting detecting method in the dipulse weldering current waveform phase of the cycles, adopt the test platform take industrial computer and arc welding process detector as main body, and described arc welding process detector comprises Hall current sensor, it is characterized in that comprising the following steps:
1) utilize Hall current sensor to detect the welding current of a dipulse weldering welding process, and by data collecting card, sample, the current signal I of gained is outputed to industrial computer;
2), according to mean value and the standard deviation thereof of current signal I, estimate the local time range;
3) the electric current average of the every bit in calculated current signal I in the local time range, thus the equal value sequence of electric current local formed;
4) adopt the dual threshold method to judge the residing flash group of the equal value sequence every bit of electric current local and weak impulse train stage, obtain group stage flag sequence;
5), take group's stage flag sequence as foundation, in the scope of each group, adopt the dual threshold method to mark the residing phase of the cycles of all signaling points in this group.
As a kind of preferred version, step 2) described estimation local time range, specific as follows:
2.1) establish a threshold value swing parameter, by with following formula (1), formula (2) and formula (3), calculating respectively the upper threshold value of electric current, middle threshold value and lower threshold value:
uV＝avg+std×q (1)
mV＝avg (2)
dV＝avg-std×q (3)
Wherein, avg is the mean value of current signal I, and std is the standard deviation of current signal I, and q is that threshold value swings parameter, and uV is the upper threshold value of electric current, and mV is the middle threshold value of electric current, and dV is the lower threshold value of electric current;
2.2) respectively with uV, mV and dV three threshold values, mean value uP, mP and the dP in 1～1000 cycle of statistics current signal I;
2.3) get uP, mP and dP three's intermediate value, as the reference cycle;
2.4) get 0.5～1000 times of reference cycle as the local time range.
As a kind of preferred version, the scope that described threshold value swings parameter q is (0,100).
As a kind of preferred version, step 4) the described employing dual threshold method judgement residing flash group of the equal value sequence every bit of electric current local and weak impulse train stage, specific as follows:
4.1) calculate mean value and the standard deviation of the equal value sequence of electric current local; If the threshold value of an equal value sequence of electric current local swings parameter, by calculate respectively upper threshold value and the lower threshold value of the equal value sequence of electric current local with following formula (4) and formula (5):
ULV＝AVG+STD×SR (4)
DLV＝AVG-STD×SR (5)
Wherein, AVG is the mean value of the equal value sequence of electric current local, and STD is the standard deviation of the equal value sequence of electric current local; SR is that the threshold value of the equal value sequence of electric current local swings parameter, and ULV is the upper threshold value of the equal value sequence of electric current local, and DLV is the lower threshold value of the equal value sequence of electric current local;
4.2) if the value of the 1st of the equal value sequence of electric current local more than or equal to ULV, mark this be the flash group stage; If the value of the 1st is less than or equal to DLV, mark this be the weak impulse train stage; Otherwise namely the value of the 1st is greater than DLV and less than ULV, and this is the weak impulse train stage for mark;
4.3) if the value that the equal value sequence of electric current local i is ordered more than or equal to ULV, mark i point is the flash group stage; If the value that i is ordered is less than or equal to DLV, mark i point is the weak impulse train stage; Otherwise namely the i value of ordering is greater than DLV and less than ULV, and the i point is inherited the stage mark that i-1 is ordered; Wherein, i 〉=2.
As a kind of preferred version, the scope that the threshold value of the equal value sequence of described electric current local swings parameter S R is (0,100).
As a kind of preferred version, in step 5) also comprise before and correct each strong and weak impulse train saltus step marginal point in group stage flag sequence, specific as follows:
To any h in group's stage flag sequence strong and weak impulse train saltus step marginal point k, the value of ordering take the k of the equal value sequence of electric current local is as threshold value, reach forward the saltus step of surveying backward high-frequency impulse centered by the k point in current signal I, find a most contiguous high-frequency impulse trip point u, replace k, correcting is h strong and weak impulse train saltus step marginal point.
As a kind of preferred version, step 5) the described employing dual threshold method mark phase of the cycles, specific as follows:
5.1) in group's stage flag sequence, any one arises from the m point, terminate in flash group or weak impulse train that n is ordered, calculate in [m, n] scope, the average of current signal I and standard deviation, by calculate upper threshold value and the lower threshold value of electric current in the group with following formula (6), formula (7):
groupULV＝groupAvg+groupStd×groupSR (6)
groupDLV＝groupAvg-groupStd×groupSR (7)
Wherein, groupAvg is the average of current signal I in [m, n] scope, groupStd is the standard deviation of current signal I in [m, n] scope, and groupSR is that the current threshold in the group swings parameter, groupULV is the upper threshold value of group interior electric current, and groupDLV is the lower threshold value of group interior electric current;
5.2) if the value that current signal I m is ordered more than or equal to groupULV, mark this be group in peak phase; If the value that m is ordered is less than or equal to groupDLV, mark this be group in the base value stage; Otherwise namely the m value of ordering is greater than groupDLV and less than groupULV, and this is base value stage in the group for mark;
5.3) if current signal I m point residing be the flash group, and be group in peak phase, the phase of the cycles of this point is labeled as " flash different mountain value "; If the flash group and be group in the base value stage, the phase of the cycles of this point is labeled as " flash group base value "; If weak impulse train and be group in peak phase, the phase of the cycles of this point is labeled as " weak pulse rushes the different mountain value "; If weak impulse train and be group in the base value stage, the phase of the cycles of this point is labeled as " weak impulse train base value ";
5.4) if the value that current signal I m+p is ordered more than or equal to groupULV, mark m+p point be group in peak phase; If the value that m+p is ordered is less than or equal to groupDLV, mark m+p point is the base value stage in the group; Otherwise namely the m+p value of ordering is greater than groupDLV and less than groupULV, and the m+p point is inherited group internal labeling that m+p-1 order; Wherein, 1≤p≤n-m;
5.5) if current signal I m+p point residing be the flash group, and be group in peak phase, the phase of the cycles of this point is labeled as " flash different mountain value "; If the flash group and be group in the base value stage, the phase of the cycles of this point is labeled as " flash group base value "; If weak impulse train and be group in peak phase, the phase of the cycles of this point is labeled as " weak pulse rushes the different mountain value "; If weak impulse train and be group in the base value stage, the phase of the cycles of this point is labeled as " weak impulse train base value ".
As a kind of preferred version, the scope that the current threshold in described group swings parameter groupSR is (0,100).
As a kind of preferred version, described test platform also comprises welding wire conveying mechanism, walking dolly and guide rail and oscillograph; Described arc welding process detector also comprises voltage sensor.
The present invention has following beneficial effect with respect to prior art:
1, to utilize the low frequency modulations of dipulse weldering be in fact to realize in periodic variation local size of current the characteristics that the periodicity of the instantaneous energy that welding wire and molten bath are obtained is controlled to the self-adapting detecting method in the dipulse of the present invention weldering current waveform phase of the cycles, can the dipulse weldering of Different Modulations be detected, the method is by detecting the situation of change of electric current average in the local time range, flash group and weak impulse train stage be can distinguish exactly, and peak value and base value stage in the group further divided into.
2, the self-adapting detecting method in the dipulse weldering current waveform phase of the cycles of the present invention, the electric current local average of calculating gained is larger when the flash group, and is less when weak impulse train, fine with the correlation in impulse train stage; The situation of change that meets very much the primary current waveform by group's stage mark of the equal value sequence dual threshold of electric current local being analyzed gained; And the high-frequency impulse cycle mark in the paired pulses group also overwhelming majority is correct.Make further to calculate a series of characteristic parameter time errors such as flash different mountain value mean value, flash different mountain value time average less, can say and provide convenience for follow-up signal analysis and processing.
Description of drawings
Fig. 1 is the self-adapting detecting method schematic flow sheet in the dipulse weldering current waveform phase of the cycles of the present invention.
Fig. 2 a～2c is respectively the weldering of the first dipulse current waveform, its local average sequence waveform and impulse train stage mark schematic diagram.
Fig. 3 a～3b is respectively the first dipulse weldering current waveform and the phase of the cycles mark schematic diagram that amplifies after showing.
Fig. 4 a～4c is respectively the weldering of the second dipulse current waveform, its local average sequence waveform and impulse train stage mark schematic diagram.
Fig. 5 a～5c is respectively the third dipulse weldering current waveform, its local average sequence waveform and impulse train stage mark schematic diagram.
Fig. 6 a～6c is respectively the 4th kind of dipulse weldering current waveform, its local average sequence waveform and impulse train stage mark schematic diagram.
Fig. 7 a～7c is respectively the 5th kind of dipulse weldering current waveform, its local average sequence waveform and impulse train stage mark schematic diagram.
Fig. 8 a～8c is respectively the 6th kind of dipulse weldering current waveform, its local average sequence waveform and impulse train stage mark schematic diagram.
Fig. 9 a～9b is respectively the second dipulse weldering current waveform and the phase of the cycles mark schematic diagram that amplifies after showing.
Figure 10 a～10b is respectively the third dipulse weldering current waveform and the phase of the cycles mark schematic diagram that amplifies after showing.
Figure 11 a～12b is respectively the 4th kind of dipulse of amplifying after showing and welds current waveform and phase of the cycles mark schematic diagram.
Figure 12 a～12b is respectively the 5th kind of dipulse of amplifying after showing and welds current waveform and phase of the cycles mark schematic diagram.
Figure 13 a～13b is respectively the 6th kind of dipulse of amplifying after showing and welds current waveform and phase of the cycles mark schematic diagram.
The specific embodiment
Embodiment 1:
The self-adapting detecting method in the dipulse weldering current waveform phase of the cycles of the present embodiment, adopt test platform to comprise industrial computer, arc welding process detector, welding wire conveying mechanism, walking dolly and guide rail and oscillograph, described arc welding process detector comprises voltage sensor and Hall current sensor.
As shown in Figure 1, the self-adapting detecting method in the dipulse of the present embodiment weldering current waveform phase of the cycles comprises the following steps:
1) utilize Hall current sensor to detect the welding current of a dipulse weldering welding process, and by data collecting card, sample, the current signal I of gained is outputed to industrial computer, waveform by oscilloscope display as shown in Figure 2 a, the characteristics of this current waveform are: the current peak of strong and weak impulse train is different, and base value is also different;
2) calculate mean value and the standard deviation thereof of dipulse arc welding process electric current according to current signal I, and then estimation local time range, the local time range is sliding time window commonly used during a signal is processed, and is specific as follows:
2.1) establish a threshold value swing parameter, by with following formula (1), formula (2) and formula (3), calculating respectively the upper threshold value of electric current, middle threshold value and lower threshold value:
uV＝avg+std×q (1)
mV＝avg (2)
dV＝avg-std×q (3)
Wherein, avg is the mean value of dipulse arc welding process electric current, and std is the standard deviation of dipulse arc welding process electric current, and q is that the threshold value of value 0.5 swings parameter, and uV is the upper threshold value of electric current, and mV is the middle threshold value of electric current, and dV is the lower threshold value of electric current;
2.2) respectively with uV, mV and dV three threshold values, mean value uP, mP and the dP in 50 cycles of statistics current signal I;
2.3) get uP, mP and dP three's intermediate value, as the reference cycle;
2.4) get 2 times of reference cycle as the local time range;
3) the electric current average of the every bit in calculated current signal I in the local time range, thus the equal value sequence of electric current local formed, as shown in Figure 2 b;
4) adopt the dual threshold method to judge the residing flash group of the equal value sequence every bit of electric current local and weak impulse train stage, obtain group stage flag sequence, specific as follows:
4.1) calculate mean value and the standard deviation of the equal value sequence of electric current local; If the threshold value of an equal value sequence of electric current local swings parameter, by calculate respectively upper threshold value and the lower threshold value of the equal value sequence of electric current local with following formula (4) and formula (5):
ULV＝AVG+STD×SR (4)
DLV＝AVG-STD×SR (5)
Wherein, AVG is the mean value of the equal value sequence of electric current local, and STD is the standard deviation of the equal value sequence of electric current local; SR is that the threshold value of the equal value sequence of electric current local of value 0.5 swings parameter, and ULV is the upper threshold value of the equal value sequence of electric current local, and DLV is the lower threshold value of the equal value sequence of electric current local;
4.2) if the value of the 1st of the equal value sequence of electric current local more than or equal to ULV, mark this be the flash group stage; If the value of the 1st is less than or equal to DLV, mark this be the weak impulse train stage; Otherwise namely the value of the 1st is greater than DLV and less than ULV, and this is the weak impulse train stage for mark;
4.3) if the value that the i of the equal value sequence of electric current local is ordered more than or equal to ULV, mark i point is the flash group stage; If the value that i is ordered is less than or equal to DLV, mark i point is the weak impulse train stage; Otherwise namely the i value of ordering is greater than DLV and less than ULV, and the i point is inherited the stage mark that i-1 is ordered; Wherein, i 〉=2;
5) to any h in group's stage flag sequence strong and weak impulse train saltus step marginal point k, the value of ordering take the k of the equal value sequence of electric current local is as threshold value, reach forward the saltus step of surveying backward high-frequency impulse centered by the k point in current signal I, find a most contiguous high-frequency impulse trip point u, replace k, correcting is h strong and weak impulse train saltus step marginal point; The impulse train stage mark of final gained as shown in Figure 2 c;
6) take group's stage flag sequence as foundation, in the scope of each group, adopt the dual threshold method to mark the residing phase of the cycles of all signaling points in this group, specific as follows:
6.1) in group's stage flag sequence, any one arises from the m point, terminate in flash group or weak impulse train that n is ordered, calculate in [m, n] scope, the average of current signal I and standard deviation, by calculate upper threshold value and the lower threshold value of electric current in the group with following formula (6), formula (7):
groupULV＝groupAvg+groupStd×groupSR (6)
groupDLV＝groupAvg-groupStd×groupSR (7)
Wherein, groupAvg is the average of current signal I in [m, n] scope, groupStd is the standard deviation of current signal I in [m, n] scope, and groupSR is that the interior current threshold of the group of value 0.5 swings parameter, groupULV is the upper threshold value of group interior electric current, and groupDLV is the lower threshold value of group interior electric current;
6.2) if the value that current signal I m is ordered more than or equal to groupULV, mark this be group in peak phase; If the value that m is ordered is less than or equal to groupDLV, mark this be group in the base value stage; Otherwise namely the m value of ordering is greater than groupDLV and less than groupULV, and this is base value stage in the group for mark;
6.3) if current signal I m point residing be the flash group, and be group in peak phase, the phase of the cycles of this point is labeled as " flash different mountain value "; If the flash group and be group in the base value stage, the phase of the cycles of this point is labeled as " flash group base value "; If weak impulse train and be group in peak phase, the phase of the cycles of this point is labeled as " weak pulse rushes the different mountain value "; If weak impulse train and be group in the base value stage, the phase of the cycles of this point is labeled as " weak impulse train base value ";
6.4) if the value that current signal I m+p is ordered more than or equal to groupULV, mark m+p point be group in peak phase; If the value that m+p is ordered is less than or equal to groupDLV, mark m+p point is the base value stage in the group; Otherwise namely the m+p value of ordering is greater than groupDLV and less than groupULV, and the m+p point is inherited group internal labeling that m+p-1 order; Wherein, 1≤p≤n-m;
6.5) if current signal I m+p point residing be the flash group, and be group in peak phase, the phase of the cycles of this point is labeled as " flash different mountain value "; If the flash group and be group in the base value stage, the phase of the cycles of this point is labeled as " flash group base value "; If weak impulse train and be group in peak phase, the phase of the cycles of this point is labeled as " weak pulse rushes the different mountain value "; If weak impulse train and be group in the base value stage, the phase of the cycles of this point is labeled as " weak impulse train base value ".
As shown in Fig. 3 a～3b, be current waveform and the phase of the cycles signature of amplifying after showing, " 2 " represent the flash different mountain value stage, and " 1 " represents the flash group base value stage, " 1 " represents that weak pulse rushes the different mountain value stage, the weak impulse train base value stage of " 2 " representative; The mark overwhelming majority in the phase of the cycles is correct, peak value or base value stage mark in the group conform to the primary current waveform, at group's saltus step edge, there is the erroneous judgement of certain ratio, but the error of bringing to the statistical computation of subsequent characteristics value is very little, because generally, a low-frequency pulse group comprises the more high-frequency impulse cycle.
Embodiment 2:
The main feature of the present embodiment is: adopt the self-adapting detecting method of above-described embodiment 1 to detect the phase of the cycles that other five kinds of dipulses are welded the process electric current, the various characteristics of five kinds of dipulse weldering current waveforms are: the second is as shown in Fig. 4 a, the current peak of strong and weak impulse train is identical, and base value is different; The third as shown in Figure 5 a, the current peak of strong and weak impulse train is different, base value is identical; The 4th kind as shown in Figure 6 a, and the current peak of strong and weak impulse train is close, and base value is also close, but the dutycycle of the high-frequency impulse of strong and weak impulse train is different; The 5th kind as shown in Figure 7a, and in weak impulse train, the peak value base value differs less; The 6th kind as shown in Figure 8 a, and strong and weak impulse train edge transition is mild.
To above-mentioned every kind of dipulse weldering, gather respectively the current signal of an arc welding process, calculate the equal value sequence of electric current local, as shown in Fig. 4 b～8b, electric current local average is larger when the flash group, and is less when weak impulse train, fine with the correlation in impulse train stage; As shown in Fig. 4 c～8c, meet very much the situation of change of current waveform in Fig. 4 a～8a by group's stage mark of electric current local average sequence waveform dual threshold being analyzed gained.
Finally, base value or peak phase in the mark group, as shown in Fig. 9 a～9b, Figure 10 a～10b, Figure 11 a～11b, Figure 12 a～12b and Figure 13 a～13b, be five kinds of current waveforms and the phase of the cycles signature of amplifying after showing.Wherein, in phase of the cycles signature, in the weak impulse train base value stage of " 2 " representative, " 1 " represents that weak pulse rushes the different mountain value stage, and " 1 " represents the flash group base value stage, and " 2 " represent the flash different mountain value stage.As seen, in five kinds of current waveform situations, the mark in the phase of the cycles overwhelming majority is correct.
The above; only be patent preferred embodiment of the present invention; but the protection domain of patent of the present invention is not limited to this; anyly be familiar with those skilled in the art in the disclosed scope of patent of the present invention; the technical scheme of patent and patent of invention design thereof are equal to replacement or are changed according to the present invention; while as the threshold value swing parameter S R of threshold value swing parameter q, the equal value sequence of electric current local, the current threshold swing parameter groupSR in the group etc., getting other numerical value, all belong to the protection domain of patent of the present invention.
Claims (9)
1. the self-adapting detecting method in the dipulse weldering current waveform phase of the cycles, adopt the test platform take industrial computer and arc welding process detector as main body, and described arc welding process detector comprises Hall current sensor, it is characterized in that comprising the following steps:
1) utilize Hall current sensor to detect the welding current of a dipulse weldering welding process, and by data collecting card, sample, the current signal I of gained is outputed to industrial computer;
2), according to mean value and the standard deviation thereof of current signal I, estimate the local time range;
3) the electric current average of the every bit in calculated current signal I in the local time range, thus the equal value sequence of electric current local formed;
4) adopt the dual threshold method to judge the residing flash group of the equal value sequence every bit of electric current local and weak impulse train stage, obtain group stage flag sequence;
5), take group's stage flag sequence as foundation, in the scope of each group, adopt the dual threshold method to mark the residing phase of the cycles of all signaling points in this group.
2. the self-adapting detecting method in the dipulse weldering current waveform phase of the cycles according to claim 1, is characterized in that: step 2) described estimation local time range, specific as follows:
2.1) establish a threshold value swing parameter, by with following formula (1), formula (2) and formula (3), calculating respectively the upper threshold value of electric current, middle threshold value and lower threshold value:
uV＝avg+std×q (1)
mV＝avg (2)
dV＝avg-std×q (3)
Wherein, avg is the mean value of current signal I, and std is the standard deviation of current signal I, and q is that threshold value swings parameter, and uV is the upper threshold value of electric current, and mV is the middle threshold value of electric current, and dV is the lower threshold value of electric current;
2.2) respectively with uV, mV and dV three threshold values, mean value uP, mP and the dP in 1～1000 cycle of statistics current signal I;
2.3) get uP, mP and dP three's intermediate value, as the reference cycle;
2.4) get 0.5～1000 times of reference cycle as the local time range.
3. dipulse according to claim 2 is welded the self-adapting detecting method in the current waveform phase of the cycles, it is characterized in that: the scope that described threshold value swings parameter q is (0,100).
4. dipulse according to claim 1 is welded the self-adapting detecting method in the current waveform phase of the cycles, it is characterized in that: step 4) the described employing dual threshold method judgement residing flash group of the equal value sequence every bit of electric current local and weak impulse train stage, specific as follows:
4.1) calculate mean value and the standard deviation of the equal value sequence of electric current local; If the threshold value of an equal value sequence of electric current local swings parameter, by calculate respectively upper threshold value and the lower threshold value of the equal value sequence of electric current local with following formula (4) and formula (5):
ULV＝AVG+STD×SR (4)
DLV＝AVG-STD×SR (5)
Wherein, AVG is the mean value of the equal value sequence of electric current local, and STD is the standard deviation of the equal value sequence of electric current local; SR is that the threshold value of the equal value sequence of electric current local swings parameter, and ULV is the upper threshold value of the equal value sequence of electric current local, and DLV is the lower threshold value of the equal value sequence of electric current local;
4.2) if the value of the 1st of the equal value sequence of electric current local more than or equal to ULV, mark this be the flash group stage; If the value of the 1st is less than or equal to DLV, mark this be the weak impulse train stage; Otherwise namely the value of the 1st is greater than DLV and less than ULV, and this is the weak impulse train stage for mark;
4.3) if the value that the equal value sequence of electric current local i is ordered more than or equal to ULV, mark i point is the flash group stage; If the value that i is ordered is less than or equal to DLV, mark i point is the weak impulse train stage; Otherwise namely the i value of ordering is greater than DLV and less than ULV, and the i point is inherited the stage mark that i-1 is ordered; Wherein, i 〉=2.
5. dipulse according to claim 4 is welded the self-adapting detecting method in the current waveform phase of the cycles, it is characterized in that: the scope that the threshold value of the equal value sequence of described electric current local swings parameter S R is (0,100).
6. the self-adapting detecting method in the dipulse weldering current waveform phase of the cycles according to claim 1, is characterized in that: in step 5) also comprise before and correct each strong and weak impulse train saltus step marginal point in group stage flag sequence, specific as follows:
To any h in group's stage flag sequence strong and weak impulse train saltus step marginal point k, the value of ordering take the k of the equal value sequence of electric current local is as threshold value, reach forward the saltus step of surveying backward high-frequency impulse centered by the k point in current signal I, find a most contiguous high-frequency impulse trip point u, replace k, correcting is h strong and weak impulse train saltus step marginal point.
7. the self-adapting detecting method in the dipulse weldering current waveform phase of the cycles according to claim 1, is characterized in that: step 5) the described employing dual threshold method mark phase of the cycles, specific as follows:
5.1) in group's stage flag sequence, any one arises from the m point, terminate in flash group or weak impulse train that n is ordered, calculate in [m, n] scope, the average of current signal I and standard deviation, by calculate upper threshold value and the lower threshold value of electric current in the group with following formula (6), formula (7):
groupULV＝groupAvg+groupStd×groupSR (6)
groupDLV＝groupAvg-groupStd×groupSR (7)
Wherein, groupAvg is the average of current signal I in [m, n] scope, groupStd is the standard deviation of current signal I in [m, n] scope, and groupSR is that the current threshold in the group swings parameter, groupULV is the upper threshold value of group interior electric current, and groupDLV is the lower threshold value of group interior electric current;
5.2) if the value that current signal I m is ordered more than or equal to groupULV, mark this be group in peak phase; If the value that m is ordered is less than or equal to groupDLV, mark this be group in the base value stage; Otherwise namely the m value of ordering is greater than groupDLV and less than groupULV, and this is base value stage in the group for mark;
5.3) if current signal I m point residing be the flash group, and be group in peak phase, the phase of the cycles of this point is labeled as " flash different mountain value "; If the flash group and be group in the base value stage, the phase of the cycles of this point is labeled as " flash group base value "; If weak impulse train and be group in peak phase, the phase of the cycles of this point is labeled as " weak pulse rushes the different mountain value "; If weak impulse train and be group in the base value stage, the phase of the cycles of this point is labeled as " weak impulse train base value ";
5.4) if the value that current signal I m+p is ordered more than or equal to groupULV, mark m+p point be group in peak phase; If the value that m+p is ordered is less than or equal to groupDLV, mark m+p point is the base value stage in the group; Otherwise namely the m+p value of ordering is greater than groupDLV and less than groupULV, and the m+p point is inherited group internal labeling that m+p-1 order; Wherein, 1≤p≤n-m;
5.5) if current signal I m+p point residing be the flash group, and be group in peak phase, the phase of the cycles of this point is labeled as " flash different mountain value "; If the flash group and be group in the base value stage, the phase of the cycles of this point is labeled as " flash group base value "; If weak impulse train and be group in peak phase, the phase of the cycles of this point is labeled as " weak pulse rushes the different mountain value "; If weak impulse train and be group in the base value stage, the phase of the cycles of this point is labeled as " weak impulse train base value ".
8. dipulse according to claim 7 is welded the self-adapting detecting method in the current waveform phase of the cycles, it is characterized in that: the scope that the current threshold in described group swings parameter groupSR is (0,100).
9. according to claim 1-8 described dipulses are welded the self-adapting detecting method in the current waveform phases of the cycles, and it is characterized in that: described test platform also comprises welding wire conveying mechanism, walking dolly and guide rail and oscillograph; Described arc welding process detector also comprises voltage sensor.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105116853A (en) * | 2015-07-21 | 2015-12-02 | 长沙长泰机器人有限公司 | Agility control device and agility control method for casting automatic cleaning |
| CN105436666A (en) * | 2015-12-30 | 2016-03-30 | 华南理工大学 | Trapezoidal wave modulation welding current waveform |
| CN112828419A (en) * | 2020-12-31 | 2021-05-25 | 唐山松下产业机器有限公司 | Welding control method, device, medium and electronic equipment for forming fish scale pattern welding seam |
| CN113042861A (en) * | 2021-04-21 | 2021-06-29 | 广东开放大学（广东理工职业学院） | Aluminum alloy material multi-pulse group welding method, system, device and storage medium |
| WO2021135494A1 (en) * | 2019-12-31 | 2021-07-08 | 华南理工大学 | Method and system for modulating high-low frequency double-pulsed mig welding waveform having flexible transition |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5719182A (en) * | 1980-07-08 | 1982-02-01 | Mitsubishi Electric Corp | Pulse arc welding machine |
| JPS58196169A (en) * | 1982-05-08 | 1983-11-15 | Daihen Corp | Method and apparatus for pulse arc welding |
| CN101941116A (en) * | 2010-09-07 | 2011-01-12 | 济南海通焊接技术有限公司 | Double-pulse all-position plasma welding machine |
| CN102091849A (en) * | 2010-12-31 | 2011-06-15 | 广东易事特电源股份有限公司 | Welding method for setting double pulse welding parameters based on mathematical model |
-
2013
- 2013-07-30 CN CN201310325403.9A patent/CN103394795B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5719182A (en) * | 1980-07-08 | 1982-02-01 | Mitsubishi Electric Corp | Pulse arc welding machine |
| JPS58196169A (en) * | 1982-05-08 | 1983-11-15 | Daihen Corp | Method and apparatus for pulse arc welding |
| CN101941116A (en) * | 2010-09-07 | 2011-01-12 | 济南海通焊接技术有限公司 | Double-pulse all-position plasma welding machine |
| CN102091849A (en) * | 2010-12-31 | 2011-06-15 | 广东易事特电源股份有限公司 | Welding method for setting double pulse welding parameters based on mathematical model |
Non-Patent Citations (1)
| Title |
|---|
| 徐强，国旭明，王宗杰，杨成刚: "双脉冲MIG焊对2219Al-Cu合金焊缝组织及性能的影响", 《热加工工艺》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105116853A (en) * | 2015-07-21 | 2015-12-02 | 长沙长泰机器人有限公司 | Agility control device and agility control method for casting automatic cleaning |
| CN105436666A (en) * | 2015-12-30 | 2016-03-30 | 华南理工大学 | Trapezoidal wave modulation welding current waveform |
| WO2021135494A1 (en) * | 2019-12-31 | 2021-07-08 | 华南理工大学 | Method and system for modulating high-low frequency double-pulsed mig welding waveform having flexible transition |
| CN112828419A (en) * | 2020-12-31 | 2021-05-25 | 唐山松下产业机器有限公司 | Welding control method, device, medium and electronic equipment for forming fish scale pattern welding seam |
| CN113042861A (en) * | 2021-04-21 | 2021-06-29 | 广东开放大学（广东理工职业学院） | Aluminum alloy material multi-pulse group welding method, system, device and storage medium |
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