A communication transceiver conversion device and welding machine system

Abstract

This utility model discloses a communication transceiver conversion device and a welding machine system, including a signal modulation module and a signal demodulation module. The signal modulation module includes at least a first comparator and a modulation switch. The first input terminal of the first comparator is connected to a control module, the second input terminal of the first comparator is connected to a first reference signal source, and the output terminal of the first comparator is connected to the controlled terminal of the modulation switch. The input terminal of the modulation switch is connected to a power supply bus to modulate a carrier signal, and the output terminal of the modulation switch is grounded. The signal demodulation module includes at least a voltage divider unit and a second comparator. The input terminal of the voltage divider unit is connected to the power supply bus, the voltage divider terminal of the voltage divider unit is connected to the first input terminal of the second comparator, the second input terminal of the second comparator is connected to a second reference signal source, and the output terminal of the second comparator is connected to the control module. This design has a simple structure, reduces costs, and is flexible and reliable in use.

Description

Technical Field

[0001] This utility model relates to the field of signal transmission equipment technology, and in particular to a communication transceiver conversion device and a welding machine system. Background Technology

[0002] In traditional digital gas shielded welding systems, communication between devices such as welding machines, wire feeders, and remote control boxes typically uses bus interfaces such as RS232, RS485, RS422, and CAN. These buses usually require dedicated transceiver chips to convert the level signals output by the microprocessor into the electrical standards specified by their respective communication protocols, enabling stable and reliable transmission of communication data over strong electromagnetic interference and long distances. However, the bus often requires two or more signal lines for transmission, and additional power lines are needed between devices for power transmission. In the field of signal transmission in gas shielded welding equipment, a large number of connecting lines not only increases cost and complexity but also reduces the reliability of the equipment.

[0003] Therefore, manufacturers have tried to use power line carrier signal transmission to reduce the cost of transmission cables. However, power line carrier also requires specialized power line carrier chips and relatively complex signal modulation and demodulation circuits. In gas shielded welding systems, the signal transmission distance between devices is mostly within 80 meters, so it does not have much advantage overall. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a communication transceiver conversion device and welding machine system, which has a simple structure, reduced costs, and is flexible and reliable in use.

[0005] A communication transceiver conversion device according to a first aspect of the present invention includes: a signal modulation module, comprising at least a first comparator and a modulation switch, wherein a first input terminal of the first comparator is connected to a control module, a second input terminal of the first comparator is connected to a first reference signal source, an output terminal of the first comparator is connected to a controlled terminal of the modulation switch, an input terminal of the modulation switch is connected to a power supply bus to modulate a carrier signal, and an output terminal of the modulation switch is grounded; and a signal demodulation module, comprising at least a voltage divider unit and a second comparator, wherein an input terminal of the voltage divider unit is connected to a power supply bus, a voltage divider terminal of the voltage divider unit is connected to a first input terminal of the second comparator, a second input terminal of the second comparator is connected to a second reference signal source, and an output terminal of the second comparator is connected to a control module.

[0006] A communication transceiver conversion device according to an embodiment of the present utility model has at least the following beneficial effects: This utility model relates to a communication transceiver conversion device. The control module outputs a communication signal to the signal modulation module, i.e., the first input terminal of the first comparator. The level of the communication signal and the first reference voltage output by the first reference signal source are compared by the first comparator, which controls the switching of the modulation switch. The modulation switch loads a wave signal onto the power signal transmitted on the power supply bus, thereby realizing signal transmission. The signal demodulation module can also obtain the carrier signal in the power signal from the power supply bus through a voltage divider unit. The voltage divider unit divides the voltage on the power supply bus and then outputs it to the first input terminal of the second comparator. The level of the divided carrier signal and the second reference voltage output by the second reference signal source are compared by the second comparator to form a demodulated signal, which is then output to the control module. This design uses the first and second comparators for signal modulation and demodulation, eliminating the need for a dedicated power line carrier chip. It realizes the process of converting the communication signal from low voltage to high voltage and transmitting it through the power supply bus, as well as the process of converting the carrier signal from high voltage to low voltage and forming a demodulated signal for output to the control module. The structure is simple, the cost is reduced, and the use is flexible and reliable.

[0007] According to some embodiments of the present invention, the communication transceiver conversion device further includes a self-resetting switch. The input terminal of the modulation switch and the input terminal of the voltage divider unit are both connected to the power supply bus through the self-resetting switch. The self-resetting switch disconnects or increases in resistance when the carrier signal transmission frequency reaches a frequency threshold.

[0008] According to some embodiments of the present invention, the self-resetting switch includes a thermistor RT1, the first end of which is connected to the power supply bus, and the last end of which is connected to the input terminal of the modulation switch and the input terminal of the voltage divider unit, respectively.

[0009] According to some embodiments of the present invention, the modulation switching device includes a semiconductor switching transistor Q1, the controlled terminal of the switching transistor Q1 is connected to the output terminal of the first comparator, the input terminal of the switching transistor Q1 is connected to the power supply bus, and the output terminal of the switching transistor Q1 is grounded.

[0010] According to some embodiments of the present invention, the first reference signal source includes resistor R15, resistor R20, and capacitor C10. The first end of resistor R15 is connected to the power supply, and the second end of resistor R15 is connected to the first end of resistor R20, the first end of capacitor C10, and the second input terminal of the first comparator. The second end of resistor R20 and the second end of capacitor C10 are both grounded.

[0011] According to some embodiments of the present invention, the signal modulation module includes resistor R13 and resistor R19. The first end of resistor R13 is connected to the power supply, and the last end of resistor R13 is connected to the output terminal of the first comparator, the controlled terminal of the modulation switch, and the first end of resistor R19, respectively. The last end of resistor R19 is grounded.

[0012] According to some embodiments of the present invention, the voltage divider unit includes resistor R17 and resistor R11. The first end of resistor R17 is connected to the power supply bus, the last end of resistor R17 is connected to the first input terminal of the second comparator and the first end of resistor R11, and the last end of resistor R11 is connected to the output terminal of the second comparator and the control module.

[0013] According to some embodiments of the present invention, the second reference signal source includes resistor R21 and resistor R22. The first end of resistor R21 is connected to the power supply, the last end of resistor R21 is connected to the first end of resistor R22 and the second input terminal of the second comparator, and the last end of resistor R22 is grounded.

[0014] According to some embodiments of the present invention, the communication transceiver conversion device further includes a power supply input module and a power supply modulation module. The input terminal of the power supply input module is used to connect to an input power supply, and the output terminal of the power supply input module is connected to a power supply bus to provide an output power supply. The input terminal of the power supply modulation module is connected to the output terminal of the power supply input module, and the power supply modulation module modulates the output power supply to form a power supply. The output terminal of the power supply modulation module is connected to the signal modulation module and the signal demodulation module respectively.

[0015] The welding machine system according to a second aspect of the present invention includes the communication transceiver conversion device disclosed in any of the above embodiments.

[0016] The welding machine system according to the embodiments of this utility model has at least the following beneficial effects: The welding machine system of this utility model uses the communication transceiver conversion device disclosed in any of the above embodiments to receive and send communication signals. It has a simple structure, reduces costs, and is flexible and reliable in use.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1This is a schematic diagram of the communication structure of one embodiment of the welding machine system of this utility model; Figure 2 This is a circuit diagram of the power supply input module of one embodiment of the communication transceiver conversion device of this utility model; Figure 3 This is a circuit diagram of the power supply modulation module of one embodiment of the communication transceiver conversion device of this utility model; Figure 4 This is a circuit diagram of the signal modulation module and the signal demodulation module of one embodiment of the communication transceiver conversion device of this utility model.

[0019] Figure label: Signal modulation module 100; first comparator 110; modulation switch 120; first reference signal source 130; signal demodulation module 200; voltage divider unit 210; second comparator 220; second reference signal source 230; self-resetting switch 300; power input module 400; rectifier unit 410; power modulation module 500; control module 600; power bus 700. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0021] In the description of this utility model, it should be understood that the directional descriptions, such as the terms "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] like Figures 1 to 4 As shown, a communication transceiver conversion device according to a first aspect embodiment of the present invention includes a signal modulation module 100 and a signal demodulation module 200. The signal modulation module 100 includes at least a first comparator 110 and a modulation switch 120. The first input terminal of the first comparator 110 is connected to a control module 600, the second input terminal of the first comparator 110 is connected to a first reference signal source 130, and the output terminal of the first comparator 110 is connected to the controlled terminal of the modulation switch 120. The input terminal is used to connect to the power supply bus 700 to modulate the carrier signal. The output terminal of the modulation switch 120 is grounded. The signal demodulation module 200 includes at least a voltage divider unit 210 and a second comparator 220. The input terminal of the voltage divider unit 210 is used to connect to the power supply bus 700. The voltage divider terminal of the voltage divider unit 210 is connected to the first input terminal of the second comparator 220. The second input terminal of the second comparator 220 is connected to the second reference signal source 230. The output terminal of the second comparator 220 is used to connect to the control module 600.

[0025] It should be noted that each device can be equipped with a communication transceiver conversion device. The device has a control module 600, which is connected to both the first input terminal of the first comparator 110 and the output terminal of the second comparator 220. The devices transmit electrical energy and carrier signals through the power supply bus 700. It can be understood that when the control module 600 of the same device generates a carrier signal on the power supply bus 700, the control module 600 can also receive the demodulated signal of the carrier signal through the signal demodulation module 200. However, since the signal is sent and received simultaneously, the control module 600 can discard or shield the demodulated signal.

[0026] This utility model's communication transceiver conversion device outputs a communication signal from the control module 600 to the signal modulation module 100, i.e., the first input terminal of the first comparator 110. The level of the communication signal and the first reference voltage output by the first reference signal source 130 are compared by the first comparator 110, which controls the modulation switch 120 to switch on and off. The modulation switch 120 loads a wave signal onto the power signal transmitted on the power supply bus 700, thereby realizing signal transmission. The signal demodulation module 200 can also obtain the carrier signal in the power signal from the power supply bus 700 through the voltage divider unit 210. The voltage divider unit 210 performs voltage division processing on the power supply bus 700. The signal is then output to the first input of the second comparator 220. The level of the divided carrier signal and the second reference voltage output by the second reference signal source 230 are compared by the second comparator 220 to form a demodulated signal, which is then output to the control module 600. This design uses the first comparator 110 and the second comparator 220 to perform signal modulation and demodulation. It does not require a dedicated power line carrier chip. It realizes the process of the communication signal being converted from low voltage to high voltage and transmitted through the power supply bus 700, as well as the process of the carrier signal being converted from high voltage to low voltage and forming a demodulated signal to be output to the control module 600. The structure is simple, the cost is reduced, and the use is flexible and reliable.

[0027] In some embodiments of this utility model, such as Figure 4 As shown, the communication transceiver conversion device also includes a self-resetting switch 300. The input terminals of the modulation switch 120 and the voltage divider unit 210 are both connected to the power supply bus 700 through the self-resetting switch 300. The self-resetting switch 300 disconnects or its resistance increases when the carrier signal transmission frequency reaches a frequency threshold.

[0028] It is understandable that when the communication transceiver conversion device sends or receives carrier signals too frequently, it will cause power loss in the power supply bus 700, voltage drop and affect normal power supply. Therefore, when the carrier signal transmission frequency reaches the frequency threshold, the self-resetting switch 300 will disconnect due to temperature or increase in resistance to prevent the carrier signal from being sent or received, thereby ensuring the stability of the power supply voltage.

[0029] In some embodiments of this utility model, the self-resetting switch 300 includes a thermistor RT1, the first end of which is connected to the power supply bus 700, and the last end of which is connected to the input terminal of the modulation switch 120 and the input terminal of the voltage divider unit 210, respectively.

[0030] As the temperature rises, the resistance of the temperature-sensitive resistor RT1 gradually increases. When the carrier signal transmission frequency is too high, the current passing through the temperature-sensitive resistor RT1 increases, which will cause the temperature-sensitive resistor RT1 to rise and block the transmission or reception of the carrier signal.

[0031] In some embodiments of this utility model, the modulation switch 120 includes a semiconductor switch Q1, the controlled terminal of the switch Q1 is connected to the output terminal of the first comparator 110, the input terminal of the switch Q1 is connected to the power supply bus 700, and the output terminal of the switch Q1 is grounded.

[0032] The switching transistor Q1 can be a transistor, MOSFET, IGBT, or thyristor. The output of the first comparator 110 compares the communication signal output by the control module 600 with the first reference voltage of the first reference signal source 130 to output a level signal, which triggers the switching transistor Q1 to turn on and off, thereby superimposing the carrier signal onto the power signal transmitted by the power supply bus 700.

[0033] In some embodiments of this utility model, the first reference signal source 130 includes a resistor R15, a resistor R20, and a capacitor C10. The first end of the resistor R15 is connected to the power supply, and the last end of the resistor R15 is connected to the first end of the resistor R20, the first end of the capacitor C10, and the second input terminal of the first comparator 110, respectively. The last ends of the resistor R20 and the last ends of the capacitor C10 are both grounded.

[0034] Resistors R15 and R20 divide the power supply voltage output by the power supply and capacitor C10 provides voltage regulation and filtering to form a first reference voltage. The first comparator 110 compares the communication signal with the first reference voltage to improve the accuracy of signal modulation.

[0035] In some embodiments of this utility model, the signal modulation module 100 includes a resistor R13 and a resistor R19. The first end of the resistor R13 is connected to the power supply, and the last end of the resistor R13 is connected to the output terminal of the first comparator 110, the controlled terminal of the modulation switch 120, and the first end of the resistor R19, respectively. The last end of the resistor R19 is grounded.

[0036] The level signal output from the first comparator 110 is amplified by resistors R13 and R19 to increase the driving force for controlling the switching of the modulation switch 120.

[0037] In some embodiments of this utility model, the voltage divider unit 210 includes a resistor R17 and a resistor R11. The first end of the resistor R17 is connected to the power supply bus 700, the last end of the resistor R17 is connected to the first input terminal of the second comparator 220 and the first end of the resistor R11, and the last end of the resistor R11 is connected to the output terminal of the second comparator 220 and the control module 600.

[0038] The voltage divider unit 210 reduces the voltage of the power signal transmitted from the power supply bus 700 by voltage division. As the hysteresis branch of the second comparator 220, the carrier signal is compared with the second reference voltage of the second reference signal source 230 to demodulate the carrier signal and form a demodulated signal. The structure is simple but can achieve accurate short-distance signal transmission through low-cost means.

[0039] In some embodiments of this utility model, the second reference signal source 230 includes resistor R21 and resistor R22. The first end of resistor R21 is connected to the power supply, the last end of resistor R21 is connected to the first end of resistor R22 and the second input terminal of the second comparator 220, and the last end of resistor R22 is grounded.

[0040] Resistors R21 and R22 divide the power supply voltage output by the power supply to form a second reference voltage. The second comparator 220 compares the carrier signal with the second reference voltage to improve the accuracy of signal demodulation.

[0041] In some embodiments of this utility model, such as Figure 2 As shown, the communication transceiver conversion device also includes a power supply input module 400 and a power supply modulation module 500. The input terminal of the power supply input module 400 is used to connect to the input power supply, and the output terminal of the power supply input module 400 is connected to the power supply bus 700 to provide output power.

[0042] The power input module 400 includes a rectifier unit 410 and a diode DB1. The rectifier unit 410 can be a full-wave rectifier bridge or a half-wave rectifier bridge composed of multiple rectifier diodes. The input terminal of the rectifier unit 410 is connected to the input power supply. The output terminal of the rectifier unit 410 is connected to the positive terminal of the diode DB1 and the input terminal of the power supply modulation module 500, respectively. The voltage of the output power supply transmitted on the power supply bus can be 30-50V. The negative terminal of the diode DB1 is connected to the power supply bus 700.

[0043] like Figure 3 As shown, the input terminal of the power supply modulation module 500 is connected to the output terminal of the power supply input module 400. The power supply modulation module 500 modulates the output power to form a power supply. The output terminal of the power supply modulation module 500 is connected to the signal modulation module 100 and the signal demodulation module 200 respectively.

[0044] The power supply modulation module 500 may include a conventional switching power supply chip and its auxiliary circuits. The power supply modulation module 500 steps down the output power supply, for example, modulates it to 3.3-5V, to form a stable power supply for the signal modulation module 100 and the signal demodulation module 200.

[0045] The welding machine system according to a second aspect of the present invention includes the communication transceiver conversion device disclosed in any of the above embodiments.

[0046] The welding system may include welding machines, wire feeders, remote control boxes and other equipment. Each piece of equipment is equipped with a communication transceiver conversion device. Power and communication are transmitted between the equipment through the communication transceiver conversion devices in the two pieces of equipment and the power supply bus 700 between the communication transceiver conversion devices.

[0047] The welding machine system of this utility model uses the communication transceiver conversion device disclosed in any of the above embodiments to receive and send communication signals. It has a simple structure, reduces costs, and is flexible and reliable in use.

[0048] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0049] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A communication transceiver conversion device, characterized in that, include: The signal modulation module includes at least a first comparator and a modulation switch. The first input terminal of the first comparator is connected to the control module, the second input terminal of the first comparator is connected to the first reference signal source, the output terminal of the first comparator is connected to the controlled terminal of the modulation switch, the input terminal of the modulation switch is connected to the power supply bus to modulate the carrier signal, and the output terminal of the modulation switch is grounded. The signal demodulation module includes at least a voltage divider unit and a second comparator. The input terminal of the voltage divider unit is connected to the power supply bus, the voltage divider terminal of the voltage divider unit is connected to the first input terminal of the second comparator, the second input terminal of the second comparator is connected to a second reference signal source, and the output terminal of the second comparator is connected to the control module.

2. The communication transceiver conversion device according to claim 1, characterized in that: It also includes a self-resetting switch, wherein the input terminal of the modulation switch and the input terminal of the voltage divider unit are both connected to the power supply bus through the self-resetting switch, wherein the self-resetting switch disconnects or its resistance increases when the carrier signal transmission frequency reaches a frequency threshold.

3. The communication transceiver conversion device according to claim 2, characterized in that: The self-resetting switch includes a thermistor RT1, the first end of which is connected to the power supply bus, and the second end of which is connected to the input terminal of the modulation switch and the input terminal of the voltage divider unit.

4. The communication transceiver conversion device according to claim 1, characterized in that: The modulation switching device includes a semiconductor switching transistor Q1. The controlled terminal of the switching transistor Q1 is connected to the output terminal of the first comparator, the input terminal of the switching transistor Q1 is connected to the power supply bus, and the output terminal of the switching transistor Q1 is grounded.

5. A communication transceiver conversion device according to claim 1, characterized in that: The first reference signal source includes resistor R15, resistor R20, and capacitor C10. The first end of resistor R15 is connected to the power supply, and the second end of resistor R15 is connected to the first end of resistor R20, the first end of capacitor C10, and the second input terminal of the first comparator. The second ends of resistor R20 and capacitor C10 are both grounded.

6. A communication transceiver conversion device according to claim 1, characterized in that: The signal modulation module includes resistor R13 and resistor R19. The first end of resistor R13 is connected to the power supply, and the second end of resistor R13 is connected to the output of the first comparator, the controlled end of the modulation switch, and the first end of resistor R19. The second end of resistor R19 is grounded.

7. A communication transceiver conversion device according to claim 1, characterized in that: The voltage divider unit includes resistor R17 and resistor R11. The first end of resistor R17 is connected to the power supply bus, the second end of resistor R17 is connected to the first input terminal of the second comparator and the first end of resistor R11, and the second end of resistor R11 is connected to the output terminal of the second comparator and the control module.

8. A communication transceiver conversion device according to claim 1, characterized in that: The second reference signal source includes resistors R21 and R22. The first end of resistor R21 is connected to the power supply, and the second end of resistor R21 is connected to the first end of resistor R22 and the second input terminal of the second comparator. The second end of resistor R22 is grounded.

9. A communication transceiver conversion device according to claim 1, characterized in that: It also includes a power input module and a power modulation module. The input terminal of the power input module is used to connect to the input power supply, and the output terminal of the power input module is connected to the power supply bus to provide output power. The input terminal of the power supply modulation module is connected to the output terminal of the power supply input module. The power supply modulation module modulates the output power to form a power supply. The output terminal of the power supply modulation module is connected to the signal modulation module and the signal demodulation module respectively.

10. A welding machine system, characterized in that, Includes the communication transceiver conversion device as described in any one of claims 1 to 9.

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