CN218592164U - Carrier communication welding system - Google Patents
Carrier communication welding system Download PDFInfo
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- CN218592164U CN218592164U CN202223182510.4U CN202223182510U CN218592164U CN 218592164 U CN218592164 U CN 218592164U CN 202223182510 U CN202223182510 U CN 202223182510U CN 218592164 U CN218592164 U CN 218592164U
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Abstract
The utility model provides a carrier communication welding system, this system includes: the welding power supply, the wire feeding device and the carrier cable are arranged; the welding power supply is connected with the wire feeding device through a carrier cable; the welding power supply includes: a first modulation circuit and a first demodulation circuit; wire drive feed unit includes: a second modulation circuit and a second demodulation circuit; the first modulation circuit is connected with the carrier cable to modulate carrier signals with various different frequencies; the second demodulation circuit is connected with the carrier cable, and carrier signals of various different frequencies modulated by the first modulation circuit are demodulated; a second modulation circuit is connected with a carrier cable to modulate carrier signals with various different frequencies; the first demodulation circuit is connected with the carrier cable, and carrier signals of various different frequencies modulated by the second modulation circuit are demodulated. The carrier communication of the welding power supply and the wire feeding device based on carrier signals with different frequencies is realized, the successful communication possibility is improved, and the anti-interference capability is improved.
Description
Technical Field
The utility model relates to a welding equipment technical field, in particular to carrier communication welding system.
Background
Under some working conditions, a workpiece needs to be welded by a plurality of carrier welding machines at the same time, carrier communication is carried out on the plurality of carrier welding machines and the plurality of wire feeders at the same time, carrier signals can interfere with each other, the welding machines stop working, and a plurality of interferences exist for a long time and even can cause that construction cannot be carried out.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an anti-jamming carrier communication welding system.
In order to achieve the above object, the utility model provides a carrier communication welding system, it includes:
the welding power supply, the wire feeding device and the carrier cable are arranged;
the welding power supply is connected with the wire feeding device through the carrier cable;
the welding power supply includes: a first modulation circuit and a first demodulation circuit;
the wire feeder includes: a second modulation circuit and a second demodulation circuit;
the first modulation circuit is configured to be connected with the carrier cable and modulate carrier signals with different frequencies;
the second demodulation circuit is configured to be connected with the carrier cable and demodulate the carrier signals of the plurality of different frequencies modulated by the first modulation circuit;
the second modulation circuit is configured to be connected with the carrier cable and modulate carrier signals of a plurality of different frequencies;
the first demodulation circuit is configured to be connected with the carrier cable and demodulate the carrier signals of the plurality of different frequencies modulated by the second modulation circuit.
In a specific embodiment, the first modulation circuit includes: a PWM signal generating unit and a carrier signal modulating unit;
the PWM signal generating unit is used for generating PWM signals with various different frequencies to the carrier signal modulating unit;
and the carrier signal modulation unit is used for modulating a carrier signal according to the PWM signal and superposing the modulated carrier signal to a voltage signal in the carrier cable.
In a specific embodiment, the PWM signal generating unit includes:
the circuit comprises a first micro control unit, a first capacitor, a first resistor, a first power supply, a second power supply, a third power supply and a first high-speed photoelectric coupler;
the first micro control unit is used for generating PWM signals with various frequencies;
a PWM output pin of the first micro control unit is connected with a first end of the first resistor, and a second end of the first resistor is connected with the first power supply;
a PWM output pin of the first micro control unit is connected with a low level input pin of the first high-speed photoelectric coupler;
the first capacitor is connected between a first access power pin of the first high-speed photoelectric coupler and a first grounding pin of the high-speed photoelectric coupler; a first access power supply pin of the first high-speed photoelectric coupler is connected with the second power supply; a first grounding pin of the high-speed photoelectric coupler is grounded;
a second access power supply pin of the first high-speed photoelectric coupler is connected with the third power supply;
a second grounding pin of the first high-speed photoelectric coupler is grounded;
and a low level output pin of the first high-speed photoelectric coupler is connected with the carrier signal modulation unit.
Specifically, the first micro control unit is further configured to generate a PWM signal having the same frequency as the set frequency according to the frequency set by the user.
In a specific embodiment, the carrier signal modulation unit includes:
the power supply comprises a first capacitor, a first diode, a second resistor, a third resistor, a first triode, a fourth resistor, a fourth power supply, a third capacitor, a fifth resistor, a second triode, a sixth resistor, a fourth capacitor, a fifth capacitor, a seventh resistor, a fifth power supply, a sixth capacitor and an eighth resistor;
the second capacitor is connected between a second access power supply pin of the first high-speed photoelectric coupler and a second grounding pin of the first high-speed photoelectric coupler;
the first end of the second resistor is connected with a low-level output pin of the first high-speed photoelectric coupler, and the second end of the second resistor is respectively connected with the first end of the third resistor and the base electrode of the first triode; the second end of the third resistor is grounded;
the cathode of the first diode is connected with the first end of the second resistor, and the anode of the first diode is connected with the second end of the second resistor;
the emitter of the first triode is grounded, and the collector of the first triode is connected with the first end of the fourth resistor; a second end of the fourth resistor is connected with the fourth power supply;
a collector of the first triode is connected with a first end of the third capacitor, and a second end of the third capacitor is respectively connected with a base of the second triode and a first end of the fifth resistor;
a second end of the fifth resistor is grounded;
an emitter of the second triode is respectively connected with a first end of the sixth resistor and a first end of the fourth capacitor; a second end of the sixth resistor and a second end of the fourth capacitor are both grounded;
a collector of the second triode is respectively connected with a first end of the fifth capacitor and a first end of the seventh resistor; a second end of the seventh resistor is connected to the fifth power supply, a first end of the sixth capacitor, and a first end of the eighth resistor, respectively;
a second end of the sixth capacitor and a second end of the eighth resistor are both grounded;
and the second end of the fifth capacitor is connected with the carrier cable.
In a specific embodiment, the first demodulation circuit includes: the carrier signal demodulation device comprises a carrier signal acquisition unit and a carrier signal demodulation unit;
the carrier signal acquisition unit is configured to be connected with the carrier cable and is used for acquiring carrier signals transmitted on the carrier cable;
and the carrier signal demodulation unit is used for demodulating the carrier signal acquired by the carrier signal acquisition unit.
In a specific embodiment, the carrier signal acquisition unit includes:
the power supply comprises a seventh capacitor, a ninth resistor, a second diode, a third diode, an eighth capacitor, a first operational amplifier, a ninth capacitor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a second operational amplifier, a sixth power supply, a fourteenth resistor and a first voltage regulator tube;
the first end of the seventh capacitor and the first end of the ninth resistor are both connected with the carrier cable;
an anode of the second diode, a cathode of the third diode and a first end of the eighth capacitor are respectively connected with a second end of the ninth resistor;
a second end of the seventh capacitor, a cathode of the second diode, an anode of the third diode and a second end of the eighth capacitor are all grounded;
the first end of the eighth capacitor is also connected with the non-inverting input end of the first operational amplifier; the inverting input end of the first operational amplifier is connected with the output end of the first operational amplifier;
an output end of the first operational amplifier is connected with a first end of the ninth capacitor and a first end of the tenth resistor respectively; a second end of the ninth capacitor is grounded;
a second end of the tenth resistor is connected to a first end of the eleventh resistor and an inverting input end of the second operational amplifier, respectively;
a second end of the eleventh resistor is connected with an output end of the second operational amplifier; the non-inverting input end of the second operational amplifier is connected with the twelfth resistor in series and then grounded; the non-inverting input end of the second operational amplifier is also connected with the thirteenth resistor and the sixth power supply in series;
the output end of the second operational amplifier is connected with the first end of the fourteenth resistor; a second end of the fourteenth resistor is connected with a cathode of the first voltage regulator tube;
and the anode of the first voltage-stabilizing tube is grounded.
In a specific embodiment, the carrier signal demodulation unit includes:
the second high-speed photoelectric coupler, a seventh power supply, a tenth capacitor, a fifteenth resistor, an eighth power supply and a second micro-control unit;
the first end of the second high-speed photoelectric coupler is connected with the cathode of the first voltage-stabilizing tube; the second end of the second high-speed photoelectric coupler is connected with the anode of the first voltage-stabilizing tube;
a third end of the second high-speed photoelectric coupler is connected with the seventh power supply and a first end of the tenth capacitor; the fourth end of the second high-speed photoelectric coupler is connected with a capturing pin of the second micro control unit;
the fifth end of the second high-speed photoelectric coupler is grounded;
a second end of the tenth capacitor is grounded;
and the eighth power supply and the fifteenth resistor are connected in series and then connected with the fourth end of the second high-speed photoelectric coupler.
In a specific embodiment, the second micro control unit is configured to convert the captured carrier signal according to a frequency set by a user.
Compared with the prior art, the technical scheme has the following advantages:
in the embodiment of the utility model, a welding power supply, a wire feeding device and a carrier cable are arranged; the welding power supply is connected with the wire feeding device through a carrier cable; the welding power supply includes: a first modulation circuit and a first demodulation circuit; wire drive feed unit includes: a second modulation circuit and a second demodulation circuit; the first modulation circuit is connected with the carrier cable to modulate carrier signals with various different frequencies; the second demodulation circuit is connected with the carrier cable, and carrier signals of various different frequencies modulated by the first modulation circuit are demodulated; the second modulation circuit is connected with the carrier cable to modulate carrier signals with various different frequencies; the first demodulation circuit is connected with the carrier cable, and carrier signals of various different frequencies modulated by the second modulation circuit are demodulated. Through setting up first modulation circuit and the second demodulation circuit of complex, second modulation circuit and the first demodulation circuit of complex have realized welding power supply and wire drive feed unit based on the carrier communication of the carrier signal of multiple different frequencies, have improved the successful possibility of communication to the interference killing feature has been improved.
Drawings
The following drawings are only intended to illustrate and explain the present invention, and do not limit the scope of the present invention. Wherein:
fig. 1 is a frame diagram of a carrier communication welding system in accordance with an embodiment of the present invention;
fig. 2 is a circuit diagram of the first modulation circuit 100 according to an embodiment of the present invention;
fig. 3 is a schematic circuit diagram of the first demodulation circuit 110 according to an embodiment of the present invention;
fig. 4 is a circuit diagram of the first demodulation circuit 110 according to an embodiment of the present invention.
Detailed Description
The present application is described in further detail below with reference to the figures and examples. The features and advantages of the present application will become more apparent from the description.
The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
In addition, the technical features described below in the different embodiments of the present application may be combined with each other as long as they do not conflict with each other.
The embodiment of the utility model provides a carrier communication welding system for improve the interference killing feature, the structural schematic of this system is shown in FIG. 1, include:
a welding power supply 101, a wire feeder 102, and a carrier cable 103; to conserve wiring, carrier cable 103 typically multiplexes the powered positive cable of wire feeder 102. A welding positive cable is connected between the welding power supply 101 and the wire feeding device 102 and forms a power supply loop together with the carrier cable 103;
the welding power supply 101 is connected with the wire feeder 102 through a carrier cable 103;
the welding power supply 101 includes: a first modulation circuit 100 and a first demodulation circuit 110;
wire feeder 102 includes: a second modulation circuit 200 and a second demodulation circuit 210;
a first modulation circuit 100 configured to be connected to a carrier cable 103 for modulating a plurality of carrier signals of different frequencies;
a second demodulation circuit 210 configured to be connected to the carrier cable 103 and demodulate the carrier signals of the plurality of different frequencies modulated by the first modulation circuit 100;
a second modulation circuit 200 configured to be connected to the carrier cable 103 and to modulate a plurality of carrier signals of different frequencies;
the first demodulation circuit 110, configured to be connected to the carrier cable 103, demodulates the carrier signals of the plurality of different frequencies modulated by the second modulation circuit 200.
The carrier communication welding system adopts a bidirectional carrier communication mode, and can flexibly set the carrier signal communication frequency for realizing welding.
Specifically, the first modulation circuit 100 includes: a PWM signal generating unit and a carrier signal modulating unit; the PWM signal generating unit is used for generating PWM signals with various different frequencies to the carrier signal modulating unit; and the carrier signal modulation unit is used for modulating the carrier signal according to the PWM signal and superposing the modulated carrier signal on the voltage signal in the carrier cable 103.
In a specific embodiment, as shown in fig. 2, the PWM signal generating unit includes:
the system comprises a first micro control unit MCU1, a first capacitor C1, a first resistor R1, a first power supply V1, a second power supply V2, a third power supply V3 and a first high-speed photoelectric coupler PC1;
the first micro control unit MCU1 is used for generating PWM signals with different frequencies, for example, a TMS320F28375DPTPT chip can be selected;
a PWM output pin of the first micro control unit MCU1 is connected with a first end of a first resistor R1, and a second end of the first resistor R1 is connected with a first power supply V1; specifically, V1 is generally 3.3V.
A PWM output pin of the first micro control unit MCU1 is connected with a low level input pin (INB) of the first high-speed photoelectric coupler PC1;
the first capacitor C1 is connected between a first access power supply pin (VCC 1) of the first high-speed photoelectric coupler PC1 and a first grounding pin (GND 1) of the high-speed photoelectric coupler for filtering; a first access power supply pin (VCC 1) of the first high-speed photoelectric coupler PC1 is connected with a second power supply V2; a first grounding pin (GND 1) of the high-speed photoelectric coupler is grounded; specifically, the second power supply V2 is typically 3.3V;
a second access power supply pin (VCC 2) of the first high-speed photoelectric coupler PC1 is connected with a third power supply V3; specifically, V3 is generally 5V.
A second grounding pin (GND 2) of the first high-speed photoelectric coupler PC1 is grounded;
a low level output pin (VCC 2) of the first high speed photocoupler PC1 is connected to the carrier signal modulation unit.
Specifically, the first micro control unit MCU1 is further configured to generate a PWM signal having the same frequency as the set frequency according to the frequency set by the user. That is, the first modulation circuit 100 modulates a carrier signal having the same frequency as a set frequency according to the frequency set by the user. Correspondingly, the second demodulation circuit 210 can perform demodulation according to the set frequency, so that the frequency of the communication signal can be changed in time after the carrier signal receives interference, so as to reply communication as soon as possible and improve the anti-interference capability.
As shown in fig. 2, the carrier signal modulation unit includes:
the circuit comprises a second capacitor C2, a first diode D1, a second resistor R2, a third resistor R3, a first triode Q1, a fourth resistor R4, a fourth power supply V4, a third capacitor C3, a fifth resistor R5, a second triode D2, a sixth resistor R6, a fourth capacitor C4, a fifth capacitor C5, a seventh resistor R7, a fifth power supply V5, a sixth capacitor C6 and an eighth resistor R8;
the second capacitor C2 is connected between a second access power pin (VCC 2) of the first high-speed photoelectric coupler PC1 and a second ground pin (GND 2) of the first high-speed photoelectric coupler PC1;
a first end of the second resistor R2 is connected with a low-level output pin (OUTB) of the first high-speed photoelectric coupler PC1, and a second end of the second resistor R2 is respectively connected with a first end of the third resistor R3 and a base electrode of the first triode Q1; the second end of the third resistor R3 is grounded;
the cathode of the first diode D1 is connected with the first end of the second resistor R2, and the anode of the first diode D1 is connected with the second end of the second resistor R2;
an emitting electrode of the first triode Q1 is grounded, and a collector electrode of the first triode Q1 is connected with a first end of the fourth resistor R4; the second end of the fourth resistor R4 is connected with a fourth power supply V4; specifically, V4 is typically 15V;
a collector of the first triode Q1 is connected with a first end of a third capacitor C3, and a second end of the third capacitor C3 is respectively connected with a base of the second triode Q2 and a first end of a fifth resistor R5; the second triode Q2 generally adopts a high-power transistor;
the second end of the fifth resistor R5 is grounded;
an emitting electrode of the second triode Q2 is respectively connected with a first end of a sixth resistor R6 and a first end of a fourth capacitor C4; the second end of the sixth resistor R6 and the second end of the fourth capacitor C4 are both grounded;
a collector of the second triode Q2 is connected to a first end of the fifth capacitor C5 and a first end of the seventh resistor R7, respectively; a second end of the seventh resistor R7 is connected to the fifth power supply V5, a first end of the sixth capacitor C6, and a first end of the eighth resistor R8, respectively; specifically, V5 is typically 36V;
the second end of the sixth capacitor C6 and the second end of the eighth resistor R8 are both grounded;
a second terminal of the fifth capacitor C5 is connected to the carrier cable 103.
Level conversion is carried out by controlling the on and off of a first triode Q1; data downloading is realized by controlling the on and off of the Q2 so as to superpose a carrier signal with the same PWM frequency on the carrier cable 103.
It can be understood by those skilled in the art that the second modulation circuit 200 has the same structure as the first modulation circuit 100, and the description of the embodiments of the present invention is omitted here.
In an embodiment of the present invention, the first demodulation circuit 110 includes: the device comprises a carrier signal acquisition unit and a carrier signal demodulation unit; the carrier signal acquisition unit is configured to be connected with the carrier cable 103 and is used for acquiring carrier signals transmitted on the carrier cable 103; and the carrier signal demodulation unit is used for demodulating the carrier signals acquired by the carrier signal acquisition unit.
Specifically, as shown in fig. 3, the carrier signal acquiring unit includes:
a seventh capacitor C7, a ninth resistor R9, a second diode D2, a third diode D3, an eighth capacitor C8, a first operational amplifier IC1, a ninth capacitor C9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a second operational amplifier IC2, a sixth power supply V6, a fourteenth resistor R14, and a first voltage regulator tube ZD1;
a first end of the seventh capacitor C7 and a first end of the ninth resistor R9 are both connected with the carrier cable 103;
the anode of the second diode D2, the cathode of the third diode D3 and the first end of the eighth capacitor C8 are connected to the second end of the ninth resistor R9, respectively;
the second end of the seventh capacitor C7, the cathode of the second diode D2, the anode of the third diode D3 and the second end of the eighth capacitor C8 are all grounded;
the first end of the eighth capacitor C8 is further connected to the non-inverting input terminal of the first operational amplifier IC 1; the inverting input end of the first operational amplifier IC1 is connected with the output end of the first operational amplifier IC 1;
the output end of the first operational amplifier IC1 is connected to the first end of the ninth capacitor C9 and the first end of the tenth resistor R10, respectively; the second end of the ninth capacitor C9 is grounded;
a second end of the tenth resistor R10 is connected to a first end of the eleventh resistor R11 and an inverting input terminal of the second operational amplifier IC2, respectively;
a second end of the eleventh resistor R11 is connected to an output end of the second operational amplifier IC 2; the non-inverting input end of the second operational amplifier IC2 is connected with the twelfth resistor R12 in series and then is grounded; the non-inverting input end of the second operational amplifier IC2 is also connected with a thirteenth resistor R13 and a sixth power supply V6 in series; specifically, V6 is typically 15V;
the output end of the second operational amplifier IC2 is connected with the first end of the fourteenth resistor R14; a second end of the fourteenth resistor R14 is connected to the cathode of the first voltage-regulator tube ZD1;
the anode of the first zener diode ZD1 is grounded.
After being input, the carrier signal enters a following and amplifying circuit consisting of an operational amplifier IC1, resistors R10, R11, R12 and R13 for level conversion after being filtered by C7, limited by R9, clamped by D2 and D3, and then is converted into a PWM signal with the same frequency as the carrier signal, and the PWM signal enters an input pin 1 pin (pin A in the figure) of a high-speed isolation optocoupler PC1 through a current limiting resistor R14.
Specifically, as shown in fig. 3, the carrier signal demodulation unit includes:
the high-speed photoelectric coupler comprises a second high-speed photoelectric coupler PC2, a seventh power supply V7, a tenth capacitor C10, a fifteenth resistor R15, an eighth power supply V8 and a second micro control unit MCU2;
a first end (a pin A in the figure) of the second high-speed photoelectric coupler PC2 is connected with a cathode of the first voltage-regulator tube ZD1; a second end (a K pin in the figure) of the second high-speed photoelectric coupler PC2 is connected with the anode of the first voltage-stabilizing tube;
a third end (a pin VDD in the figure) of the second high-speed photoelectric coupler PC2 is connected with a seventh power supply V7 and a first end of a tenth capacitor C10; the fourth end (Vo pin in the figure) of the second high-speed photoelectric coupler PC2 is connected with a capture pin of the second micro control unit MCU2; specifically, V7 is typically 5V.
The fifth terminal (GND pin in the figure) of the second high-speed photocoupler PC2 is grounded;
the second end of the tenth capacitor C10 is grounded;
the eighth power supply V8 and the fifteenth resistor R15 are connected in series and then connected to the fourth terminal (Vo pin in the figure) of the second high-speed photo-coupler PC 2. Specifically, V8 is typically 3.3V.
In a specific embodiment, the second micro control unit is configured to convert the captured carrier signal according to a frequency set by a user.
PWM signals with the same frequency as carrier signals are output by an output pin 5 (a Vo pin in the figure) of the high-speed isolation optocoupler PC1, subjected to level conversion after passing through R15 and V8 and accessed to a capturing function pin of the MCU2, and the MCU2 converts the captured carrier signals into information identified by a main program after being checked according to the frequency set by the program and provides the information to the main program to finish data uploading.
In a specific embodiment, in order to ensure that the carrier signal transmitted by the carrier cable 103 to the first demodulation circuit 110 is accurate and is favorable for signal demodulation, as shown in fig. 4, on the basis of fig. 3, the carrier signal acquisition unit further includes: the carrier cable 103 is connected with one end of the input side of the transformer L1, and the other end of the input side of the transformer L1 is connected with the eleventh capacitor C11 and then grounded for filtering; the eighth capacitor C8 is connected in parallel across the output side of the transformer L1. Since the carrier cable 103 also transmits a voltage signal, the voltage of the transmitted electrical signal is reduced by adding the transformer L1, and the influence on the waveform of the carrier signal is not great. And the carrier signal can be amplified through the transformer L1 when the carrier signal is weak.
It can be understood by those skilled in the art that the second demodulation circuit 210 has the same structure as the first demodulation circuit 110, and the embodiments of the present invention are not described herein again.
In summary, the present embodiment provides a bidirectional communication carrier communication welding system, in which a welding power source, a wire feeding device and a carrier cable are provided; the welding power supply is connected with the wire feeding device through a carrier cable; the welding power supply includes: a first modulation circuit and a first demodulation circuit; wire drive feed unit includes: a second modulation circuit and a second demodulation circuit; the method comprises the steps that a first modulation circuit is connected with a carrier cable to modulate carrier signals with different frequencies; the second demodulation circuit is connected with the carrier cable, and carrier signals of various different frequencies modulated by the first modulation circuit are demodulated; the second modulation circuit is connected with the carrier cable to modulate carrier signals with various different frequencies; the first demodulation circuit is connected with the carrier cable, and carrier signals of various different frequencies modulated by the second modulation circuit are demodulated. Through setting up first modulation circuit and the second demodulation circuit of complex, second modulation circuit and first demodulation circuit of complex, realized welding power and wire feeder based on the carrier communication of the carrier signal of multiple different frequencies, improved the successful possibility of communication to interference killing feature has been improved. The simple hardware circuit is provided, the frequency of the carrier signal used by the carrier communication welding system is flexibly set by means of the original function menus of the welding power supply and the wire feeding device, and the adaptability of the carrier communication welding system to complex working conditions is improved.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment. In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention is not limited to any single aspect, nor is it limited to any single embodiment, nor is it limited to any combination and/or permutation of these aspects and/or embodiments. Moreover, each aspect and/or embodiment of the present invention may be used alone or in combination with one or more other aspects and/or embodiments thereof.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.
Claims (9)
1. A carrier communication welding system, comprising:
the welding power supply, the wire feeding device and the carrier cable are arranged;
the welding power supply is connected with the wire feeding device through the carrier cable;
the welding power supply includes: a first modulation circuit and a first demodulation circuit;
the wire feeder includes: a second modulation circuit and a second demodulation circuit;
the first modulation circuit is configured to be connected with the carrier cable and modulate carrier signals of a plurality of different frequencies;
the second demodulation circuit is configured to be connected with the carrier cable and demodulate the carrier signals of the plurality of different frequencies modulated by the first modulation circuit;
the second modulation circuit is configured to be connected with the carrier cable and modulate carrier signals with different frequencies;
the first demodulation circuit is configured to be connected with the carrier cable and demodulate the carrier signals of the plurality of different frequencies modulated by the second modulation circuit.
2. The carrier wave communication welding system of claim 1, wherein the first modulation circuit comprises: a PWM signal generating unit and a carrier signal modulating unit;
the PWM signal generating unit is used for generating PWM signals with various different frequencies to the carrier signal modulating unit;
and the carrier signal modulation unit is used for modulating a carrier signal according to the PWM signal and superposing the modulated carrier signal to a voltage signal in the carrier cable.
3. The carrier wave communication welding system of claim 2, wherein the PWM signal generation unit comprises:
the circuit comprises a first micro control unit, a first capacitor, a first resistor, a first power supply, a second power supply, a third power supply and a first high-speed photoelectric coupler;
the first micro control unit is used for generating PWM signals with various frequencies;
a PWM output pin of the first micro control unit is connected with a first end of the first resistor, and a second end of the first resistor is connected with the first power supply;
a PWM output pin of the first micro control unit is connected with a low level input pin of the first high-speed photoelectric coupler;
the first capacitor is connected between a first access power pin of the first high-speed photoelectric coupler and a first grounding pin of the high-speed photoelectric coupler; a first access power supply pin of the first high-speed photoelectric coupler is connected with the second power supply; a first grounding pin of the high-speed photoelectric coupler is grounded;
a second access power supply pin of the first high-speed photoelectric coupler is connected with the third power supply;
a second grounding pin of the first high-speed photoelectric coupler is grounded;
and a low level output pin of the first high-speed photoelectric coupler is connected with the carrier signal modulation unit.
4. The carrier wave communication welding system of claim 3, wherein the first micro-control unit is further configured to generate a PWM signal having the same frequency as the set frequency based on a user-set frequency.
5. The carrier communication welding system of claim 3, wherein the carrier signal modulation unit comprises:
the power supply comprises a first capacitor, a first diode, a second resistor, a third resistor, a first triode, a fourth resistor, a fourth power supply, a third capacitor, a fifth resistor, a second triode, a sixth resistor, a fourth capacitor, a fifth capacitor, a seventh resistor, a fifth power supply, a sixth capacitor and an eighth resistor;
the second capacitor is connected between a second access power supply pin of the first high-speed photoelectric coupler and a second grounding pin of the first high-speed photoelectric coupler;
the first end of the second resistor is connected with a low-level output pin of the first high-speed photoelectric coupler, and the second end of the second resistor is respectively connected with the first end of the third resistor and the base electrode of the first triode; the second end of the third resistor is grounded;
the cathode of the first diode is connected with the first end of the second resistor, and the anode of the first diode is connected with the second end of the second resistor;
an emitting electrode of the first triode is grounded, and a collector electrode of the first triode is connected with a first end of the fourth resistor; a second end of the fourth resistor is connected with the fourth power supply;
a collector of the first triode is connected with a first end of the third capacitor, and a second end of the third capacitor is respectively connected with a base of the second triode and a first end of the fifth resistor;
a second end of the fifth resistor is grounded;
an emitting electrode of the second triode is respectively connected with a first end of the sixth resistor and a first end of the fourth capacitor; a second end of the sixth resistor and a second end of the fourth capacitor are both grounded;
a collector of the second triode is respectively connected with a first end of the fifth capacitor and a first end of the seventh resistor; a second end of the seventh resistor is connected to the fifth power supply, a first end of the sixth capacitor, and a first end of the eighth resistor, respectively;
a second end of the sixth capacitor and a second end of the eighth resistor are both grounded;
and the second end of the fifth capacitor is connected with the carrier cable.
6. The carrier wave communication welding system of claim 1, wherein the first demodulation circuitry comprises: the carrier signal demodulation device comprises a carrier signal acquisition unit and a carrier signal demodulation unit;
the carrier signal acquisition unit is configured to be connected with the carrier cable and is used for acquiring carrier signals transmitted on the carrier cable;
and the carrier signal demodulation unit is used for demodulating the carrier signal acquired by the carrier signal acquisition unit.
7. The carrier communication welding system of claim 6, wherein the carrier signal acquisition unit comprises:
the power supply comprises a seventh capacitor, a ninth resistor, a second diode, a third diode, an eighth capacitor, a first operational amplifier, a ninth capacitor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a second operational amplifier, a sixth power supply, a fourteenth resistor and a first voltage regulator tube;
a first end of the seventh capacitor and a first end of the ninth resistor are both connected with the carrier cable;
the anode of the second diode, the cathode of the third diode and the first end of the eighth capacitor are respectively connected with the second end of the ninth resistor;
a second end of the seventh capacitor, a cathode of the second diode, an anode of the third diode and a second end of the eighth capacitor are all grounded;
the first end of the eighth capacitor is also connected with the non-inverting input end of the first operational amplifier; the inverting input end of the first operational amplifier is connected with the output end of the first operational amplifier;
an output end of the first operational amplifier is connected with a first end of the ninth capacitor and a first end of the tenth resistor respectively; a second end of the ninth capacitor is grounded;
a second end of the tenth resistor is connected to a first end of the eleventh resistor and an inverting input end of the second operational amplifier, respectively;
a second end of the eleventh resistor is connected with an output end of the second operational amplifier; the non-inverting input end of the second operational amplifier is connected with the twelfth resistor in series and then grounded; the non-inverting input end of the second operational amplifier is also connected with the thirteenth resistor and the sixth power supply in series;
the output end of the second operational amplifier is connected with the first end of the fourteenth resistor; a second end of the fourteenth resistor is connected with a cathode of the first voltage regulator tube;
and the anode of the first voltage-stabilizing tube is grounded.
8. The carrier communication welding system of claim 7, wherein the carrier signal demodulation unit comprises:
the second high-speed photoelectric coupler, a seventh power supply, a tenth capacitor, a fifteenth resistor, an eighth power supply and a second micro-control unit;
the first end of the second high-speed photoelectric coupler is connected with the cathode of the first voltage-stabilizing tube; the second end of the second high-speed photoelectric coupler is connected with the anode of the first voltage-stabilizing tube;
a third end of the second high-speed photoelectric coupler is connected with the seventh power supply and a first end of the tenth capacitor; the fourth end of the second high-speed photoelectric coupler is connected with a capturing pin of the second micro control unit;
the fifth end of the second high-speed photoelectric coupler is grounded;
a second end of the tenth capacitor is grounded;
and the eighth power supply and the fifteenth resistor are connected in series and then connected with the fourth end of the second high-speed photoelectric coupler.
9. The carrier wave communication welding system of claim 8, wherein the second micro-control unit is configured to convert the captured carrier wave signal according to a frequency set by a user.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223182510.4U CN218592164U (en) | 2022-11-29 | 2022-11-29 | Carrier communication welding system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223182510.4U CN218592164U (en) | 2022-11-29 | 2022-11-29 | Carrier communication welding system |
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| CN218592164U true CN218592164U (en) | 2023-03-10 |
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| CN202223182510.4U Active CN218592164U (en) | 2022-11-29 | 2022-11-29 | Carrier communication welding system |
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