CN103071895A - Control system and control method of welding equipment - Google Patents
Control system and control method of welding equipment Download PDFInfo
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- CN103071895A CN103071895A CN2013100094930A CN201310009493A CN103071895A CN 103071895 A CN103071895 A CN 103071895A CN 2013100094930 A CN2013100094930 A CN 2013100094930A CN 201310009493 A CN201310009493 A CN 201310009493A CN 103071895 A CN103071895 A CN 103071895A
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Abstract
The invention provides a control system and a control method of welding equipment. The welding equipment comprises a welding power source and a wire feeding device, wherein the communication is carried out between the welding power source and the wire feeding device by a method of loading high-frequency carriers on a power line. The control method comprises the following steps of inputting information of welding conditions at the wire feeding device side; generating a baseband signal according to the information of the welding conditions; demodulating multiple paths of high-frequency carriers with different frequency according to the generated baseband signal; sending the multiple paths of high-frequency carriers with different frequencies; at the welding power source side, receiving the multiple paths of high-frequency carriers with different frequency sent from the wire feeding device side; demodulating the received high-frequency carriers into a low-frequency modulation signal; shaping and filtering the demodulated low-frequency modulation signal, and outputting; and determining a signal for controlling the output of the welding power source, and controlling the output of the welding power source according to the determined signal. The control system and the control method have the advantages that the anti-jamming capability is realized, and the stable welding is ensured.
Description
[technical field]
The present invention relates to a kind of control system and control method of the welding equipment that is formed by the source of welding current and wire feeder, especially a kind of control system and control method of controlling the source of welding current from wire feeder side input weld information.
[background technology]
Develop rapidly along with manufacturing, in the large-scale engineering machinery field, larger in industry welding equipment use amounts such as shipbuilding, steel constructions especially, welding equipment generally is comprised of the source of welding current and wire feeder, and connected by control cables between the two, when welding, from wire feeder side input weld information control wire feed rate, simultaneously weld information is sent to the source of welding current with the output of the control source of welding current.
General wire feeder is by multi-core controlled cable connecting welding power supply, and this method can cause wire feed shakiness, voltage instability, welding unstable when remote the use, and control cables is more, easily break or short circuit.
For fear of above-mentioned deficiency, wire feeder sends to the source of welding current after can adopting the method for carrier modulation that the information such as voltage are modulated to high frequency carrier.Figure 11 is the overall structure figure that adopts the welding equipment that this mode controls.As shown in figure 11, welding equipment comprises the source of welding current 1 and wire feeder 5, be provided with control device 4 in the source of welding current 1 side, control device 4 is connected with power supply unit 3, control device 4 is controlled the output 12(source of welding current output A of the source of welding current 1 by control main loop unit 2) and 13(source of welding current output B), be provided with control device 11 in wire feeder 5 sides, control device 11 is controlled air inflow by control air valve 10, by control wire feeding motor 7, control wire feed driving mechanism 6 to the speed of sending sacrificial electrode 8 with to the amount of sending.Be connected with power line 9 between control device 4 and the control device 11, communicate in the mode that loads high frequency carrier at power line 9 between control device 4 and the control device 11.
Figure 12 shows the functional block diagram of the control system that available technology adopting high frequency carrier mode communicates by letter.As shown in figure 12, control device 11 comprises welding condition information input unit 51, and it is used for input welding condition information (such as welding current, weldingvoltage, string diameter, material, gas etc.); Baseband signal generation unit 52, it is used for the welding condition Information generation baseband signal based on 51 inputs of welding condition information input unit; High frequency carrier modulating unit 53, it is used for modulating one road high frequency carrier according to the baseband signal that the living unit 52 of baseband signal generates; Carrier wave transmitting element 54, it is used for sending the high frequency carrier that high frequency carrier modulating unit 53 modulates; Control device 4 comprises: carrier wave receiving element 61, the high frequency carrier that its carrier wave transmitting element 54 that is used for receiving control device 11 sends; Carrier wave demodulation unit 62, its high frequency carrier that is used for carrier wave receiving element 61 is received is demodulated into low-frequency modulation signal; Shaping filter unit 63, its low-frequency modulation signal that is used for carrier wave demodulation unit 62 is demodulated carries out exporting behind the shaping filter; Control module 64, it is used for the output based on the low-frequency modulation signal control source of welding current 1 of shaping filter unit 63 outputs.
In addition, control device 11 also is provided with display unit 55 and control module 56, and display unit 55 is used for showing electric current and the information such as voltage, warning that preset, and control module 56 is used for the welding condition information control wire feeder according to input.
This mode has reduced control cables weight, has reduced the control cables fault rate, has improved the mobility of wire feeder 4.But because it has only used single carrier wave, in inversion welding source widely used today, have following problem: the harmonic wave that output produces during inverter type welder work might disturb only one tunnel carrier frequency, cause and to receive, perhaps receive rub-out signal at receiver side (welding motor side), this rub-out signal control welding process, thus cause welding arc unstable, even can't weld, production is caused have a strong impact on.
[summary of the invention]
[technical problem]
The present invention is intended to in the prior art, and is easily disturbed from the signal that wire feeder side direction source of welding current side sends, thereby affects the problem of welding quality, and a kind of control system and control method of welding equipment is provided.
[solution]
The invention provides a kind of control system of welding equipment, described welding equipment comprises: the source of welding current and wire feeder, described control system comprises: the second control device that is positioned at the first control device of wire feeder side and is positioned at source of welding current side communicates in the mode that loads high frequency carrier at power line between described first control device and the described second control device; Described first control device comprises: the welding condition information input unit, and it is used for input welding condition information; The baseband signal generation unit, it is used for the welding condition Information generation baseband signal based on described welding condition information input unit input; The high frequency carrier modulating unit, it is used for modulating according to the described baseband signal that described baseband signal generation unit generates the Multi-channel high-frequency carrier wave of different frequency; The carrier wave transmitting element, it is used for sending the Multi-channel high-frequency carrier wave of the described different frequency that described high frequency carrier modulating unit modulates; Described second control device comprises: the carrier wave receiving element, and it is for the Multi-channel high-frequency carrier wave of the different frequency of the carrier wave transmitting element transmission that receives described first control device; The carrier wave demodulation unit, its high frequency carrier that is used for described carrier wave receiving element is received is demodulated into low-frequency modulation signal; The shaping filter unit, its low-frequency modulation signal that is used for described carrier wave demodulation unit is demodulated carries out exporting behind the shaping filter; Determining unit, it is used for being identified for controlling from low-frequency modulation signal of shaping filter unit output the signal of the output of the described source of welding current; Control module is based on the output of the definite described source of welding current of signal controlling of described determining unit.
The invention provides a kind of control method of welding equipment, described welding equipment comprises: described welding equipment comprises: the source of welding current and wire feeder communicate in the mode that loads high frequency carrier at power line between the described source of welding current and the described wire feeder; Described control method comprises: in described wire feeder side, and welding condition input information step: input welding condition information; Baseband signal generates step: based on the welding condition Information generation baseband signal of inputting in described welding condition input information step; High frequency carrier modulation step: according to generating the Multi-channel high-frequency carrier wave that the baseband signal that generates in the step modulates different frequency in described baseband signal; Carrier wave forwarding step: the Multi-channel high-frequency carrier wave that is sent in the described different frequency that modulates in the described high frequency carrier modulation step; In described source of welding current side, carrier wave receiving step: the Multi-channel high-frequency carrier wave that is received in the different frequency that sends in the carrier wave forwarding step of described wire feeder side; Carrier wave demodulation step: will in described carrier wave receiving step, receive high frequency carrier and be demodulated into low-frequency modulation signal; The shaping filter step is exported behind the low-frequency modulation signal shaping filter that will demodulate in the carrier wave demodulation step; Determining step is identified for controlling the signal of the output of the described source of welding current from the low-frequency modulation signal of exporting the shaping filter step; The control step is based on the output of the described source of welding current of signal controlling of determining in described determining step.
[invention beneficial effect]
The present invention is owing to adopting the Multi-channel high-frequency carrier wave of different frequency to transmit welding condition information, in the situation that high frequency carrier is interfered, correct or mistake that can resoluting signal, and correct signal is used for control welding output, thereby strengthen so that grow stability, the antijamming capability that can improve welding equipment when distance is welded, guarantee high performance welding.Even existing the output harmonic wave of inverter type welder to disturb, the scene also can guarantee stable welding.
[description of drawings]
Fig. 1 is the functional block diagram of control system of the present invention;
Fig. 2 is the hardware configuration schematic diagram of control device of the wire feeder of the first embodiment of the present invention;
Fig. 3 is the hardware configuration schematic diagram of control device of the source of welding current of first embodiment of the invention;
Fig. 4 is the carrier wave demodulation electronic circuit of first embodiment of the invention and the circuit theory diagrams of shaping filter electronic circuit;
Fig. 5 is the workflow diagram of the control system of first embodiment of the invention;
Fig. 6 is baseband signal generation, modulation, transmission and the reception when welding equipment is worked of the control system of the first embodiment of the present invention, the oscillogram of demodulation;
Fig. 7 is the particular flow sheet of definite step of the first embodiment of the present invention;
Fig. 8 is the flow chart of control system when the welding equipment holding state of the second embodiment of the present invention;
Fig. 9 is baseband signal generation, modulation, transmission and the reception when the welding equipment holding state of the control system of the second embodiment of the present invention, the oscillogram of demodulation;
Figure 10 is the particular flow sheet of definite step of the third embodiment of the present invention;
Figure 11 is the overall structure block diagram of existing welding equipment;
Figure 12 is the functional block diagram of the control device of existing welding equipment.
[specific embodiment]
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described.
Fig. 1 is the functional block diagram of control system of the present invention.Control system of the present invention comprises: the second control device 30 that is positioned at the first control device 20 of wire feeder side and is positioned at source of welding current side communicates in the mode that loads high frequency carrier at power line 9 between first control device 20 and the second control device 30; First control device 20 comprises: welding condition information input unit 21, and it is used for input welding condition information (such as welding current, weldingvoltage, string diameter, material, gas etc.); Baseband signal generation unit 22, it is used for the welding condition Information generation baseband signal based on 21 inputs of welding condition information input unit; High frequency carrier modulating unit 23, it is used for giving birth to according to baseband signal the Multi-channel high-frequency carrier wave of the baseband signal modulation different frequency of unit 22 generations; Carrier wave transmitting element 24, it be used for to send the Multi-channel high-frequency carrier wave of the different frequency that high frequency carrier modulating unit 23 modulates; Second control device 30 comprises: carrier wave receiving element 31, the Multi-channel high-frequency carrier wave of the different frequency that its carrier wave transmitting element 24 that is used for reception first control device 20 sends; Carrier wave demodulation unit 32, its high frequency carrier that is used for carrier wave receiving element 31 is received is demodulated into low-frequency modulation signal; Shaping filter unit 33, its low-frequency modulation signal that is used for carrier wave demodulation unit 32 is demodulated carries out exporting behind the shaping filter; Determining unit 34, its low-frequency modulation signals that are used for 33 outputs from the shaping filter unit are identified for controlling the signal of the output of the described source of welding current; Control module 35 is based on the output (for example weldingvoltage or welding current) of the definite described source of welding current of signal controlling of described determining unit.
In addition, same as the prior art, first control device 20 also comprises the display unit (not shown), second control device 30 also comprises display unit (not shown), sampling unit (not shown) and output unit (not shown), the function of these unit is identical with the function of prior art, and not inventive point of the present invention, therefore repeat no more.
The difference of the control system of control system of the present invention and prior art (Figure 12) is: high frequency carrier modulating unit 23 of the present invention, carrier wave transmitting element 24, carrier wave receiving element 31, carrier wave demodulation unit 32, shaping filter unit 33 all can be processed for multiple signals, the Multi-channel high-frequency carrier wave of high frequency carrier modulating unit 23 modulation different frequencies for example, and the high frequency carrier modulating unit 53 of the control system of prior art, carrier wave transmitting element 54, carrier wave receiving element 61, carrier wave demodulation unit 62, shaping filter unit 63 are processed for one road signal.In addition, the determining unit 34 of control system of the present invention can also be identified for controlling the low-frequency modulation signal of the source of welding current from the multichannel low-frequency modulation signal, and there is no determining unit in the prior art.
[the first embodiment]
Below with reference to Fig. 2 to Fig. 7 the first embodiment of the present invention is described.
[hardware formation]
The hardware of at first describing the first embodiment of the present invention consists of.
Fig. 2 is that the control device 20(of wire feeder of the first embodiment of the present invention is hereinafter referred to as " first control device ") the hardware configuration schematic diagram.As shown in the figure, first control device 20 comprises that microcontroller 201(is corresponding to baseband signal generation unit 22 and high frequency carrier modulating unit 23), TIP 202(is corresponding to weld information input block 21), carrier wave transtation mission circuit 203(is corresponding to carrier wave transmitting element 24).Microcontroller 201 respectively with TIP 202(corresponding to welding condition information input unit 21), carrier wave transtation mission circuit 203(is corresponding to carrier wave transmitting element 24) be electrically connected, in addition, microcontroller 201 also is electrically connected with air valve and motor respectively, by the control to air valve and motor, and then control air inlet and wire feed.
The control procedure of wire feeder side is described below in conjunction with Fig. 2.Microcontroller 201 receives the welding condition information of TIP 202 inputs, then according to welding condition Information generation baseband signal, and according to the Multi-channel high-frequency carrier wave of baseband signal modulation different frequency, then the high frequency carrier that modulates is sent by carrier wave transtation mission circuit 203, namely, be after the buffer circuit isolation of core is amplified by transistor Q12, to send to power line 9 through transistor Q13 again by optocoupler PC15.About the technology that how to generate baseband signal and how baseband signal is modulated to the Multi-channel high-frequency carrier wave of different frequency, because it is existing mature technology, be not described in detail at this.How microcontroller 201 based on wire feed and the air inlet of welding condition information control wire feeder, also be prior art, and has nothing to do with purpose of the present invention in addition, also is not described in detail at this.
Fig. 3 is the control device 30(second control device of the source of welding current of the first embodiment of the present invention) the hardware configuration schematic diagram.As shown in Figure 3, control device 30 comprises: carrier wave coupling circuit 301(is corresponding to carrier wave receiving element 31), carrier wave demodulation circuit 302(is corresponding to carrier wave demodulation unit 32), plastic filter circuit 303(is corresponding to shaping filter unit 33) and microcontroller 304(corresponding to determining unit 34, control module 35).Microcontroller 304 can adopt the high-speed microprocessor of TI.As shown in Figure 3, carrier wave coupling circuit 301 mainly is made of coupling coil L7, capacitor C 90, C91, resistance R 119, diode D32, D33, capacitor C 96, and it is used for coupling, isolation and the decay of high-frequency carrier signal.Carrier wave demodulation circuit 302 shown in Figure 3 comprises two carrier wave demodulation electronic circuits.Plastic filter circuit 303 shown in Figure 3 comprises two shaping filter electronic circuits.Need to prove, carrier wave demodulation circuit 302 shown in Figure 3 and plastic filter circuit 303 arrange for the two-way high frequency carrier, but the invention is not restricted to this, can be according to the quantity of the high frequency carrier of different frequency, the corresponding setting.
Fig. 4 shows the circuit theory diagrams of first carrier demodulation electronic circuit (carrier wave demodulation 1) and the first shaping filter electronic circuit (shaping filter 1).As shown in Figure 4, first carrier demodulation electronic circuit is made of capacitor C 100, C99, C92, C97, C98, C101, resistance R 120, R121, potentiometer VR10, integrated decoding chip IC23.The first shaping filter electronic circuit is made of resistance R 122, R123, R124, R135, R136, R137, R138, R139, R140, R141, R142, capacitor C 107, C108, C109, amplifier IC17A, IC17B, IC17C, optocoupler PC7.
The structure of the second carrier wave demodulation electronic circuit and first carrier demodulation electronic circuit is basic identical, difference is the carrier wave demodulation frequency difference that integrated decoding chip IC23 sets, in addition, and the second shaping filter electronic circuit, identical with the structure of the first shaping filter electronic circuit, at this, no longer be repeated in this description.
The control procedure of source of welding current side is described below in conjunction with Fig. 3.Carrier wave coupling circuit 301(is corresponding to carrier wave receiving element 31) the Multi-channel high-frequency carrier wave of the different frequency that sends of reception carrier transtation mission circuit 203, then the high frequency carrier that receives is sent to carrier wave demodulation circuit 302 carries out demodulation, then the low-frequency modulation signal after the demodulation is sent to plastic filter circuit 303 and carry out shaping filter, send to afterwards microcontroller 304, be identified for the signal of the output of the source of welding current the low-frequency modulation signal of microcontroller 304 behind shaping filter, and according to the output of this signal controlling source of welding current.
[workflow]
Next the workflow of the first embodiment of the present invention is described with reference to Fig. 5.
Fig. 5 is the workflow of control system of the present invention when the welding equipment duty.As shown in Figure 5, in the wire feeder side, in step S11, by TIP 202(welding condition information input unit 21) input welding condition information (welding condition input information step).In step S12, the welding condition information exchange of input is crossed microcontroller 201(baseband signal generation unit 22) generation low-frequency analog signal (being baseband signal) (baseband signal generation step).Then in step S13, by microcontroller 201(high frequency carrier modulating unit 23) low-frequency analog signal is modulated (frequency of f1 and f2 is different) (high frequency carrier modulation step) from high frequency carrier f1 and f2, then enter step S14, with high frequency carrier f1 and f2 by carrier wave transtation mission circuit 203(carrier wave transmitting element 24) send to (carrier wave forwarding step) on the power line 9.
Then, in source of welding current side, in step S21, carrier wave coupling circuit 301(is corresponding to carrier wave receiving element 31) receive high frequency carrier f1 and f2(carrier wave receiving step by power line).Then, in step S22, by carrier wave demodulation circuit 302(corresponding to carrier wave demodulation unit 32) high frequency carrier is demodulated into low-frequency modulation signal (analog signal) B1 and B2(carrier modulation step).In step S23, with B1 and B2 by plastic filter circuit 303(corresponding to shaping filter unit 33) carry out shaping filter, and it is outputed to microcontroller 304(corresponding to determining unit 34) (shaping filter step).In step S24, microcontroller 304(is corresponding to determining unit 34) be identified for controlling the signal (determining step) of source of welding current output from the low-frequency modulation signal of shaping filter output.Then, in step S25, microcontroller 304(is corresponding to control module 35) based on the output (control step) of the signal controlling source of welding current of in step S24, determining.
For the ease of understanding, Fig. 6 shows each waveform corresponding with each step among Fig. 5.As shown in Figure 6, baseband signal is analog signal.
Below with reference to Fig. 7 the flow process of determining of the step S25 among Fig. 5 is described.As shown in Figure 7, at first, in step S100, low-frequency modulation signal B1 and B2 are compared.In step S101, the result based on comparing among the S100 determines whether B1 is consistent with B2.If B1 consistent with B2 ("Yes" among the step S101) then enters step S102.In step S102, B1 or B2 are defined as for the signal of controlling source of welding current output.If B1 and B2 inconsistent ("No" among the step S101) then enter step S103.In step S103, B1 and B2 are analyzed respectively, to be identified for controlling the signal of source of welding current output.
Definite step for step S24 can adopt following method.
At first by analyzing relatively f1 and f2, obtain stable signal value V.It is correct giving tacit consent to first cycle, namely
Or
Wherein M represents carrier wave f2, and N represents carrier wave f1,1 the 1st cycle of expression.Begin to judge from second period, even the period 1 is wrong like this, also can be corrected at once.The process that whole judgement is corrected is described below.
If stable signal value is V,
Expression carrier wave f2 is in k(k 〉=2) signal value in individual cycle, Δ V
MBe the difference between carrier wave f2 k cycle and the stationary value T, namely
Δ v
MBe the difference in k cycle of carrier wave f2 and k-1 cycle, namely
Δ v
NBe the difference in k cycle of carrier wave f1 and k-1 cycle, namely
Do not considering that two paths of signals is subject in the situation of same interference simultaneously,
If (Δ V
M=Δ V
N), so (f2 and f1 signal are all effective, can be directly the value of f1 or f2 be assigned to stationary value V);
If (Δ V
M=0, Δ V
N≠ 0), so (f2 is effective, can be directly the value of f2 be assigned to stationary value V);
If (Δ V
M≠ 0, Δ V
N=0), so (f1 is effective, can be directly the value of f1 be assigned to stationary value V);
If (Δ V
M≠ 0, Δ V
N≠ 0, Δ v
M≠ Δ v
N), (need to judge Δ v so
MWith Δ v
N);
If (Δ v
M=0), so (get f2 effective, directly the value with f2 is assigned to stationary value V);
If (Δ v
N=0), so (get f1 effective, directly the value with f1 is assigned to stationary value V).
In the above description, even the harmonic wave that output produces when supposing inverter type welder work has interference to f1 or f2, but the carrier wave receiving element still can receive f1 and f2, and just a meeting among f1 or the f2 makes a mistake.
In addition, the situation that also exists two paths of signals to be disturbed simultaneously, wherein for situation about only all making a mistake in a certain cycle, when adopting said method, Δ V
M≠ 0, Δ V
N≠ 0, Δ v
M≠ Δ v
N≠ 0, it is constant that can keep original stationary value V this moment, when the next cycle signal is correct, can work on like this.
But in fact, the interference of the harmonic wave that output produces when also having inverter type welder work, cause a road among f1 or the f2 not receive fully, in the case, in determining step, the low-frequency modulation signal after will exporting from other one road high-frequency signal demodulation, shaping is defined as the signal for the output of the control source of welding current.
In the first embodiment, in order to increase definite accuracy, carrier wave transmitting element 31 will send repeatedly (a plurality of cycle) continuously based on each the road high frequency carrier in the Multi-channel high-frequency carrier wave of same baseband signal modulation, determining unit 34 is identified for controlling the signal of the output of the described source of welding current for the low-frequency modulation signal of each shaping filter unit 33 output, the final result that control module 35 is repeatedly determined based on described determining unit is controlled the output of the described source of welding current.
For example, suppose that each the road high frequency carrier based on same baseband signal has sent three times, in second and third time (second and third cycle), the two-way high frequency carrier all is interfered and mistake occurs, then in determining step, definite result of the first time (period 1) is defined as the signal for the output of the control source of welding current, and the low-frequency modulation signal of second and third time output is abandoned the most at last.Perhaps in the supposition for the first time (period 1), the two-way high frequency carrier all is interfered and mistake occurs, and then in determining step, the most definite result of second and third time is defined as the signal for the output of the control source of welding current.
[the second embodiment]
Below with reference to Fig. 8 and Fig. 9 the second embodiment of the present invention is described.
Workflow when the hardware formation of the second embodiment and the first embodiment and duty is basic identical, therefore no longer repeats its description.Difference is below only described.The difference of the second embodiment and the first embodiment is, except welding equipment work, when the welding equipment standby, first control device still sends to second control device with welding condition information.The welding equipment standby here refers to not open arc welding gun switch.Fig. 8 is identical with the part flow process of Fig. 5, therefore gives identical mark to identical step.
[workflow during the welding equipment standby]
Fig. 8 shows the workflow of control system of the present invention when the welding equipment holding state.As shown in Figure 8, in the wire feeder side, in step S11, by TIP 202(corresponding to welding condition information input unit 21) input welding condition information (welding condition input information step).In step S42, the welding condition information exchange of input is crossed microcontroller 201(corresponding to baseband signal generation unit 22) generated data frame (being baseband signal) (baseband signal generation step), then in step S43, by microcontroller 201(corresponding to high-frequency signal modulating unit 23) Frame is modulated (frequency of f3 and f4 is different) (corresponding to high frequency carrier modulation step) from high frequency carrier f3 and f4.Then enter step S44, with the high frequency carrier f3 after the modulation and f4 by carrier wave transtation mission circuit 203(corresponding to carrier wave transmitting element 24) send to (carrier wave forwarding step) on the power line 9.
Then, in source of welding current side, in step S51, carrier wave coupling circuit 301(carrier wave receiving element 31) receives high frequency carrier f3 and f4(carrier wave receiving step by power line 9), then, in step S52, by carrier wave demodulation circuit 302(corresponding to carrier wave demodulation unit 32) high frequency carrier is demodulated into low-frequency modulation signal B3 and B4(carrier wave demodulation step).In step S53, with B3 and B4 by plastic filter circuit 303(corresponding to shaping filter unit 33) carry out shaping filter, and it is outputed to microcontroller 304(shaping filter step).In step S54, microcontroller 304(is corresponding to determining unit 34) be identified for controlling the signal (determining step) of source of welding current output, then, in step S55, microcontroller 304(is corresponding to control module 35) the coherent reference value (for example gas, string diameter) (control step) that adopts when the signal of determining is saved as the output of the control source of welding current.
For the ease of understanding, Fig. 9 shows each waveform corresponding with each step among Fig. 8.As shown in Figure 9, baseband signal is data signal.
In the present embodiment, because under holding state, the welding condition information exchange is crossed data signal send to second control device from first control device, like this when welding job, only needing to send a small amount of welding condition information gets final product, can increase work efficiency, be conducive to guarantee stability and the real-time of welding process.
In the present embodiment, when holding state, baseband signal is data signal, and in the time of in working order, baseband signal is analog signal.Use data signal to be conducive to signal is adopted the digit check method during standby, be conducive to improve the accuracy of signal.The employing analog signal is conducive to guarantee the real-time of signal during welding, is conducive to guarantee real-time, the stability of welding process.But the invention is not restricted to this, can be when holding state, baseband signal is analog signal, in the time of in working order, baseband signal is data signal.Perhaps when standby and duty, baseband signal all is analog signal or all is data signal.
For the definite step under the holding state, its flow process is identical with flow process shown in Figure 7, no longer is repeated in this description at this.
It should be noted that, in the present embodiment, because the definite step S54 under the holding state is the signal that is identified for welding control from two ways of digital signals, therefore not only can adopt the method for the first embodiment, also can be according to the characteristic of data signal, determine which railway digital signal is correct signal, such as by the good even-odd check of Frame predefined or CRC check or the methods such as ratio by a plurality of consecutive identical Frames, determine correct signal.That is, different from the idiographic flow of step S24 shown in Figure 7, can Direct Analysis two ways of digital signals (S103), and need not S100 to S102 among Fig. 7.Even when only having one road correct signal, also can differentiate and obtain correct signal by said method like this.
[the 3rd embodiment]
Below with reference to Figure 10 the third embodiment of the present invention is described.
Hardware formation and the workflow of the third embodiment of the present invention and the first embodiment are basic identical, difference is in the 3rd embodiment, in the high frequency carrier modulation step, baseband signal is modulated to three road high frequency carriers, and corresponding carrier wave forwarding step, carrier wave receiving step, carrier wave demodulation step, shaping filter step and determining step all are to process for three road signals.
Because technically, generate, modulate, send, receive two-way high frequency carrier and three road high frequency carriers without substantive difference, therefore be not described in detail.Below only the flow process of definite step of three road low-frequency modulation signals exported behind the shaping filter is described.
Figure 10 is the particular flow sheet of definite step of the third embodiment of the present invention; Three road low-frequency modulation signals of exporting behind this supposition shaping filter are C1, C2 and C3.
As shown in figure 10, in step S200, C1 and C2 are compared, judge whether the two is consistent, if the two consistent ("Yes" among the step S200) then enters step S204.In step S204, C1 or C2 are defined as if the two inconsistent ("No" among the step S200) then in step S201, compares C1 and C3, judging whether the two is consistent for the signal of controlling source of welding current output.If the two consistent ("Yes" among the S201) then enters step S202.In step S202, C1 or C3 are defined as for the signal of controlling source of welding current output.If C1 and C3 inconsistent ("No" among the S201) then enter step S203, in step S203, C2 or C3 are defined as for the signal of controlling source of welding current output.In the present embodiment, the harmonic wave that output produces during the work of acquiescence inverter type welder at most only disturbs one tunnel carrier frequency,, difference on the frequency between the Multi-channel high-frequency carrier wave can be increased for this reason.
In the 3rd embodiment, in the situation that receives three road high frequency carriers, in determining step, will be in the shaping filter step compare for three road low-frequency modulation signals of three road high frequency carriers output of described different frequency, on all four signal in three low-frequency modulation signals is defined as being used for controlling the signal of the output of the described source of welding current in described control step.
In addition, in definite step of the 3rd embodiment, can adopt with the first embodiment in the similar algorithm of definite step.Equally, each the road high frequency carrier based on same baseband signal can be sent repeatedly, the flow process that is about to Figure 10 is carried out repeatedly repeatedly, and according to the result who repeatedly determines, controls the output of the described source of welding current.Namely when in once sending, each road high frequency carrier is all in the disturbed situation, can be according to other definite result several times, finally be identified for controlling the signal of the output of the source of welding current.For example, suppose and carried out above-mentioned determining step three times, in sending for the second time, three road high frequency carriers all are interfered, i.e. C1 and C2 and C3 all inconsistent (incorrect) then can use for the first time and definite result for the third time, control the output of the source of welding current.
Can be out of shape the 3rd embodiment, namely can with four the road or more the Multi-channel high-frequency carrier wave information of carrying out transmit, its hardware configuration and workflow are all similar with the 3rd embodiment, are not described in detail at this.
It should be noted that, although in above embodiment, the functional block diagram of corresponding diagram 1, adopted the hardware configuration of Fig. 2 and Fig. 3, but the invention is not restricted to this, can adopt other hardware, for example, can adopt special base band generative circuit, a plurality of high frequency carrier modulation circuits substitute microcontroller 201.Microcontroller 201 and 304 also can adopt CPU, Programmable Logic Controller of other type etc. in addition, can adopt technical scheme according to the present invention that special control circuit is set.
In addition, when baseband signal changed, described determining unit was determined new welding condition information, and control module is based on the output of the new welding condition information control source of welding current.In addition, although in above embodiment, send the Multi-channel high-frequency carrier wave by a power line 9, the invention is not restricted to this, the Multi-channel high-frequency carrier wave can be sent by many power lines
Above, with reference to detailed or specific embodiment, describe the present invention, but those skilled in the art understand: can under the prerequisite that does not break away from spirit of the present invention and scope, carry out various changes and correction.
[industrial applicibility]
By implementing the present invention, in the situation that high frequency carrier is interfered, correct or mistake that can resoluting signal, and will correct signal be used for the control welding and export, thereby strengthen so that grow stability, the antijamming capability that can improve welding equipment when distance is welded, guarantee high performance welding.Even existing the output harmonic wave of inverter type welder to disturb, the scene also can guarantee stable welding.
[reference numerals list]
1 source of welding current
2 main loop unit
3 power supply units
4 source of welding current control device
5 wire feeders
6 wire feed driving mechanisms
7 motors
8 sacrificial electrodes
9 power lines
10 air valves
11 wire feeder control device
12 sources of welding current output A
13 sources of welding current output B
Claims (12)
1. the control system of a welding equipment, described welding equipment comprises: the source of welding current (1) and wire feeder (5), described control system comprises: the second control device (30) that is positioned at the first control device (20) of wire feeder side and is positioned at source of welding current side communicates in the mode that loads high frequency carrier at power line (9) between described first control device (20) and the described second control device (30);
Described first control device (20) comprising:
Welding condition information input unit (21), it is used for input welding condition information;
Baseband signal generation unit (22), it is used for the welding condition Information generation baseband signal based on described welding condition information input unit (21) input;
High frequency carrier modulating unit (23), it is used for modulating according to the described baseband signal that described baseband signal generation unit (22) generates the Multi-channel high-frequency carrier wave of different frequency;
Carrier wave transmitting element (24), it is used for sending the Multi-channel high-frequency carrier wave of the described different frequency that described high frequency carrier modulating unit (23) modulates;
Described second control device (30) comprising:
Carrier wave receiving element (31), it is for the Multi-channel high-frequency carrier wave of the different frequency of carrier wave transmitting element (24) transmission that receives described first control device (20);
Carrier wave demodulation unit (32), its high frequency carrier that is used for described carrier wave receiving element (31) is received is demodulated into low-frequency modulation signal;
Shaping filter unit (33), its low-frequency modulation signal that is used for described carrier wave demodulation unit (32) is demodulated carries out exporting behind the shaping filter;
Determining unit (34), it is used for being identified for controlling from the low-frequency modulation signal of shaping filter unit (33) output the signal of the output of the described source of welding current;
Control module (35) is based on the output of the definite described source of welding current of signal controlling of described determining unit (34).
2. the control system of welding equipment as claimed in claim 1, wherein,
When described welding equipment was in holding state, described baseband signal was data signal, and when described welding equipment was in welded condition, described baseband signal was analog signal.
3. the control system of welding equipment as claimed in claim 1 or 2, wherein,
In the situation that described carrier wave receiving element (31) only receives one road high frequency carrier, described determining unit (34) will be defined as from the low-frequency modulation signal of described shaping filter unit (33) output the signal be used to the output of controlling the described source of welding current;
Receive at described carrier wave receiving element (31) in the situation of Multi-channel high-frequency carrier wave of different frequency, described determining unit compares the multichannel low-frequency modulation signal of described shaping filter unit (33) output,
If described multichannel low-frequency modulation signal is in full accord, then described determining unit (34) is defined as signal be used to the output of controlling the described source of welding current with described low-frequency modulation signal;
If described multichannel low-frequency modulation signal part is consistent, then described determining unit (34) is defined as signal be used to the output of controlling the described source of welding current with on all four low-frequency modulation signal in the described multichannel low-frequency modulation signal;
If described multichannel low-frequency modulation signal is fully inconsistent, then described determining unit (34) is judged in the described multichannel low-frequency modulation signal each, with the signal of the output that is identified for controlling the described source of welding current.
4. the control system of welding equipment as claimed in claim 1 or 2, wherein,
In the situation that described carrier wave receiving element (31) only receives one road high frequency carrier, described determining unit (34) will be defined as from the low-frequency modulation signal of described shaping filter unit (33) output the signal be used to the output of controlling the described source of welding current;
Receive at described carrier wave receiving element (31) in the situation of Multi-channel high-frequency carrier wave of different frequency, described determining unit (34) judges in the multichannel low-frequency modulation signal of described shaping filter unit (33) output each, with the signal of the output that is identified for controlling the described source of welding current.
5. the control system of welding equipment as claimed in claim 3, wherein,
Described carrier wave transmitting element (24) will send repeatedly continuously based on each the road high frequency carrier in the Multi-channel high-frequency carrier wave of same baseband signal modulation, described determining unit (34) is identified for controlling the signal of the output of the described source of welding current for the low-frequency modulation signal of each shaping filter unit (33) output, the final result that described control module (35) is repeatedly determined based on described determining unit is controlled the output of the described source of welding current.
6. the control system of welding equipment as claimed in claim 4, wherein,
Described carrier wave transmitting element (24) will send repeatedly continuously based on each the road high frequency carrier in the Multi-channel high-frequency carrier wave of same baseband signal modulation, described determining unit (34) is identified for controlling the signal of the output of the described source of welding current for the low-frequency modulation signal of each shaping filter unit (33) output, the final result that described control module (35) is repeatedly determined based on described determining unit (34) is controlled the output of the described source of welding current.
7. the control method of a welding equipment, described welding equipment comprises: the source of welding current (1) and wire feeder (5) communicate in the mode that loads high frequency carrier at power line (9) between the described source of welding current (1) and the described wire feeder (5); Described control method comprises:
In described wire feeder side,
Welding condition input information step: input welding condition information;
Baseband signal generates step: based on the welding condition Information generation baseband signal of inputting in described welding condition input information step;
High frequency carrier modulation step: according to generating the Multi-channel high-frequency carrier wave that the baseband signal that generates in the step modulates different frequency in described baseband signal;
Carrier wave forwarding step: the Multi-channel high-frequency carrier wave that is sent in the described different frequency that modulates in the described high frequency carrier modulation step;
In described source of welding current side,
Carrier wave receiving step: the Multi-channel high-frequency carrier wave that is received in the different frequency that sends in the carrier wave forwarding step of described wire feeder side;
Carrier wave demodulation step: will in described carrier wave receiving step, receive high frequency carrier and be demodulated into low-frequency modulation signal;
The shaping filter step is exported behind the low-frequency modulation signal shaping filter that will demodulate in the carrier wave demodulation step;
Determining step is identified for controlling the signal of the output of the described source of welding current from the low-frequency modulation signal of exporting the shaping filter step;
The control step is based on the output of the described source of welding current of signal controlling of determining in described determining step.
8. the control method of welding equipment as claimed in claim 7, wherein,
When described welding equipment was in holding state, described baseband signal was data signal, and when described welding equipment was in welded condition, described baseband signal was analog signal.
9. such as the control method of claim 7 or 8 described welding equipments, wherein,
In the situation that only receive one road high frequency carrier in the described carrier wave receiving step, the low-frequency modulation signal that will export in the shaping filter step is defined as the signal be used to the output of controlling the described source of welding current;
Receive in described carrier wave receiving step in the situation of Multi-channel high-frequency carrier wave of different frequency, in described determining step, the multichannel low-frequency modulation signal that will export in described shaping filter step compares,
If described multichannel low-frequency modulation signal is in full accord, then described low-frequency modulation signal is defined as the signal be used to the output of controlling the described source of welding current;
If described multichannel low-frequency modulation signal part is consistent, then will be defined as signal be used to the output of controlling the described source of welding current on all four low-frequency modulation signal in the described multichannel low-frequency modulation signal;
If described multichannel low-frequency modulation signal is fully inconsistent, then in described determining step, judge in the described multichannel low-frequency modulation signal each, with the signal of the output that is identified for controlling the described source of welding current.
10. such as the control method of claim 7 or 8 described welding equipments, wherein,
In described carrier wave receiving step, only receive in the situation of one road high frequency carrier, in described determining step, the low-frequency modulation signal that will export in described shaping filter step is defined as the signal be used to the output of controlling the described source of welding current;
In described carrier wave receiving step, receive in the situation of Multi-channel high-frequency carrier wave of different frequency, in described determining step, judge in the described multichannel low-frequency modulation signal of described shaping each, with the signal of the output that is identified for controlling the described source of welding current.
11. the control method of welding equipment as claimed in claim 9, wherein,
To send repeatedly continuously based on each the road high frequency carrier in the Multi-channel high-frequency carrier wave of same baseband signal modulation, be identified for controlling the signal of the output of the described source of welding current for the low-frequency modulation signal of at every turn in the shaping filter step, exporting, based on the final result of repeatedly determining, control the output of the described source of welding current.
12. the control method of welding equipment as claimed in claim 10, wherein,
To send repeatedly continuously based on each the road high frequency carrier in the Multi-channel high-frequency carrier wave of same baseband signal modulation, be identified for controlling the signal of the output of the described source of welding current for the low-frequency modulation signal of at every turn in the shaping filter step, exporting, based on the final result of repeatedly determining, control the output of the described source of welding current.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103480948A (en) * | 2013-09-18 | 2014-01-01 | 吉首沃华德机器人科技有限责任公司 | Autonomous mobile robot for welding in narrow space |
| CN103480954A (en) * | 2013-09-18 | 2014-01-01 | 吉首沃华德机器人科技有限责任公司 | Autonomous mobile robot system for welding in narrow space |
| CN106112211A (en) * | 2016-07-05 | 2016-11-16 | 唐山松下产业机器有限公司 | Many welding machines cooperative control device, method and welding system |
| CN108127295A (en) * | 2017-12-21 | 2018-06-08 | 唐山松下产业机器有限公司 | Wire feed control method and device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030111450A1 (en) * | 2001-12-14 | 2003-06-19 | Samsung Electronics Co., Ltd. | Arc welding apparatus and control method thereof |
| WO2007100480A2 (en) * | 2006-02-22 | 2007-09-07 | Illinois Tool Works Inc. | A welding-type system with power source and remote device connected through a weld cable using binary phase shift keying for transmitting commands over the weld cable; a method of remotely controlling such power source using such transmitting phase shift keying |
| CN201371305Y (en) * | 2009-03-06 | 2009-12-30 | 深圳市佳士科技发展有限公司 | Carrier remote control device of electric welding machine |
| CN101856768A (en) * | 2010-04-23 | 2010-10-13 | 江苏科技大学 | MAG/MIG welding machine control system based on digital carrier control |
| CN102350569A (en) * | 2011-09-29 | 2012-02-15 | 熊猫电子集团有限公司 | Multifunctional digitized welding machine |
| WO2012058164A1 (en) * | 2010-10-26 | 2012-05-03 | Illinois Tool Works Inc. | Modular data over power converter for welding power supply |
| CN203062055U (en) * | 2013-01-10 | 2013-07-17 | 唐山松下产业机器有限公司 | Control system of welding device |
-
2013
- 2013-01-10 CN CN201310009493.0A patent/CN103071895B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030111450A1 (en) * | 2001-12-14 | 2003-06-19 | Samsung Electronics Co., Ltd. | Arc welding apparatus and control method thereof |
| WO2007100480A2 (en) * | 2006-02-22 | 2007-09-07 | Illinois Tool Works Inc. | A welding-type system with power source and remote device connected through a weld cable using binary phase shift keying for transmitting commands over the weld cable; a method of remotely controlling such power source using such transmitting phase shift keying |
| CN201371305Y (en) * | 2009-03-06 | 2009-12-30 | 深圳市佳士科技发展有限公司 | Carrier remote control device of electric welding machine |
| CN101856768A (en) * | 2010-04-23 | 2010-10-13 | 江苏科技大学 | MAG/MIG welding machine control system based on digital carrier control |
| WO2012058164A1 (en) * | 2010-10-26 | 2012-05-03 | Illinois Tool Works Inc. | Modular data over power converter for welding power supply |
| CN102350569A (en) * | 2011-09-29 | 2012-02-15 | 熊猫电子集团有限公司 | Multifunctional digitized welding machine |
| CN203062055U (en) * | 2013-01-10 | 2013-07-17 | 唐山松下产业机器有限公司 | Control system of welding device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103480948A (en) * | 2013-09-18 | 2014-01-01 | 吉首沃华德机器人科技有限责任公司 | Autonomous mobile robot for welding in narrow space |
| CN103480954A (en) * | 2013-09-18 | 2014-01-01 | 吉首沃华德机器人科技有限责任公司 | Autonomous mobile robot system for welding in narrow space |
| CN106112211A (en) * | 2016-07-05 | 2016-11-16 | 唐山松下产业机器有限公司 | Many welding machines cooperative control device, method and welding system |
| CN106112211B (en) * | 2016-07-05 | 2019-05-17 | 唐山松下产业机器有限公司 | More welding machine cooperative control devices, method and welding system |
| CN108127295A (en) * | 2017-12-21 | 2018-06-08 | 唐山松下产业机器有限公司 | Wire feed control method and device |
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|---|---|
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