Communication conversion circuit for handheld laser welding machine and robot

Abstract

The utility model provides a communication conversion circuit for a handheld laser welding machine and a robot. The communication conversion circuit comprises a main control chip U68, an RS232 module and a bus module, wherein the RS232 module and the bus module are connected with the main control chip; the RS232 module comprises an RS232 chip U66, and the RS232 chip U66 is connected with an RS232 signal RST and an RS232 signal RSR of the handheld laser welding machine and is connected with a TX1 pin and an RX1 pin of the main control chip U68; the bus module comprises a CAN isolation transceiver chip U67, the CAN isolation transceiver chip U67 is connected with a CAN peripheral signal CANRX pin and a CANTX pin of the main control chip U68, bus signal output ends CANH and CANL of the CAN isolation transceiver chip U67 are connected with a bus connector CN7 after passing through a filtering unit, and the bus connector CN7 is used for being connected with a robot. According to the scheme, the problem that most handheld laser welding machines cannot communicate with the robot bus at present can be solved, a circuit is built only through a small amount of hardware, and the cost benefit is remarkable.

Description

Technical Field

[0001] The present application relates to welding machine communication technology, and in particular to a communication conversion circuit between a handheld laser welder and a robot. Background Art

[0002] At present, most handheld laser welders have RS232 or RS485 ports, but robot communication ports mostly use other bus methods, and the two cannot exchange data effectively. In order to ensure the data reliability and real-time performance of handheld laser welders in complex environments, and to ensure welding quality and efficiency, it is very necessary to open up this data exchange channel. Utility Model Content

[0003] In order to solve the above-mentioned deficiencies of the prior art, the present application provides a handheld laser welder and robot communication conversion circuit to solve the dilemma that most current handheld laser welders cannot communicate with the robot bus, and only a small amount of hardware is used to build the circuit, which has significant cost-effectiveness.

[0004] In order to achieve the above purpose, the utility model adopts the following technologies:

[0005] A handheld laser welder and robot communication conversion circuit, including a main control chip U68 and an RS232 module and a bus module connected to the main control chip;

[0006] The RS232 module includes an RS232 chip U66, which is connected to the RS232 signal RS_T and RS232 signal RS_R of the handheld laser welder, and is connected to the TX1 pin and RX1 pin of the main control chip U68;

[0007] The bus module includes a CAN isolation transceiver chip U67, which is connected to the CAN peripheral signal CAN_RX pin and CAN_TX pin of the main control chip U68. The bus signal output terminals CANH and CANL of the CAN isolation transceiver chip U67 are connected to the bus connector CN7 after passing through the filtering unit. The bus connector CN7 is used to connect to the robot.

[0008] The bus signal output terminal CANH of the CAN isolation transceiver chip U67 is connected to AGND through a surge protection diode D19, and the bus signal output terminal CANL is connected to AGND through a surge protection diode D18.

[0009] The filter unit includes a capacitor C160, a common mode filter L4 and a common mode filter L5, wherein both ends of the capacitor C160 are connected between the bus signal output terminal CANH and the bus signal output terminal CANL, and are connected to both ends of the input side of the common mode filter L4, and both ends of the output side of the common mode filter L4 are connected to both ends of the input side of the common mode filter L5, and both ends of the output side of the common mode filter L5 are connected to the bus connector CN7. A bus terminal resistor R172 is connected in parallel between both ends of the output side of the common mode filter L5.

[0010] The CAN isolation transceiver chip U67 adopts the CTM1051KT type. Its pin 4 is connected to the CAN_RX pin of the main control chip U68, pin 3 is connected to the CAN_TX pin of the main control chip U68, pin 2 is connected to GND, pin 1 is connected to +5V, pin 8 is connected to AGND, pin 6 is the bus signal output terminal CANH, and pin 7 is the bus signal output terminal CANL.

[0011] The beneficial effects of the utility model are:

[0012] The solution of the utility model can solve the problem that most of the current handheld laser welders cannot communicate with the robot bus. The requirements can be met by using a small number of electronic components, avoiding the need to separately purchase expensive dedicated robot communication conversion modules, and has significant cost-effectiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a circuit structure block diagram of an embodiment of the present application.

[0014] Figure 2 This is an example diagram of the circuit principle of the RS232 module circuit of the embodiment of the present application.

[0015] Figure 3 This is an example diagram of the circuit principle of the bus module of the embodiment of the present application.

[0016] Figure 4 It is a connection relationship diagram of the main control chip U68 of the embodiment of the present application.

[0017] Figure 5 This is an example diagram of the circuit principle of the power module of the embodiment of the present application. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings, but the embodiments described in the utility model are only part of the embodiments of the utility model, rather than all the embodiments.

[0019] The present application embodiment provides a handheld laser welder and a robot communication conversion circuit, such as Figure 1As shown, it includes a main control chip U68 and an RS232 module and a bus module connected to the main control chip.

[0020] refer to Figure 2 and Figure 4 The RS232 module includes an RS232 chip U66, which is connected to the RS232 signal RS_T and RS232 signal RS_R of the handheld laser welder, and is connected to the TX1 pin and RX1 pin of the main control chip U68. The main control chip U68 can use STM32F103RBT6 to provide RS232 communication and DeviceNet protocol processing for the circuit.

[0021] refer to Figure 3 and Figure 4 The bus module includes a CAN isolation transceiver chip U67, which is connected to the CAN peripheral signal CAN_RX pin and CAN_TX pin of the main control chip U68. The bus signal output terminals CANH and CANL of the CAN isolation transceiver chip U67 are connected to the bus connector CN7 after passing through the filtering unit. The bus connector CN7 is used to connect to the robot.

[0022] The RS232 chip U66 is used to convert the RS232 signal RS_T and RS232 signal RS_R of the handheld laser welder into a signal that can be processed by the main control chip U68 and provided to the TX1 pin and RX1 pin. After processing, the main control chip U68 provides the signal to the CAN isolation transceiver chip U67 through the CAN peripheral signal CAN_RX pin and CAN_TX pin. The CAN isolation transceiver chip U67 converts the signal into a bus signal and transmits it to the robot through the bus connector CN7. The main control chip U68 is used to realize the exchange of data in two directions. Therefore, when communicating with the handheld laser welder from the robot, the reverse signal flow operation can be performed.

[0023] like Figure 3 As shown, the bus signal output terminal CANH of the CAN isolation transceiver chip U67 is connected to AGND through a surge protection diode D19, and the bus signal output terminal CANL is connected to AGND through a surge protection diode D18. The surge protection diode D19 and the surge protection diode D18 provide static electricity and surge protection.

[0024] Specifically, Figure 3As shown, the filtering unit includes a capacitor C160, a common mode filter L4 and a common mode filter L5, the two ends of the capacitor C160 are connected between the bus signal output terminal CANH and the bus signal output terminal CANL, and are connected to the two ends of the input side of the common mode filter L4, the two ends of the output side of the common mode filter L4 are connected to the two ends of the input side of the common mode filter L5, and the two ends of the output side of the common mode filter L5 are connected to the bus connector CN7. A bus terminal resistor R172 is connected in parallel between the two ends of the output side of the common mode filter L5.

[0025] The CAN isolation transceiver chip U67 uses CTM1051KT, with its 4th pin connected to the CAN_RX pin of the main control chip U68, the 3rd pin connected to the CAN_TX pin of the main control chip U68, the 2nd pin connected to GND, the 1st pin connected to +5V, the 8th pin connected to AGND, the 6th pin is the bus signal output terminal CANH, and the 7th pin is the bus signal output terminal CANL. The robot direction DeviceNet protocol is processed through CTM1051KT.

[0026] like Figure 2 As shown, the RS232 chip U66 can use SP3232EEY-L / TR, its pin 1 is connected to pin 3 through capacitor C155, pin 2 is connected to GND through capacitor C156, pin 4 is connected to pin 5 through capacitor C157, pin 6 is connected to GND through capacitor C158, pin 7 is connected to RS232 signal RS_T, pin 8 is connected to RS232 signal RS_R, pin 9 is connected to the RX1 pin of the main control chip U68, pin 10 is connected to the TX1 pin of the main control chip U68, pins 11-14 are suspended, pin 15 is connected to GND, pin 16 is connected to +5V and one end of capacitor C159, and the other end of capacitor C159 is connected to GND. The data of the direction of the handheld laser welder is processed through the RS232 serial port chip SP3232EEY-L / TR.

[0027] As a more specific implementation, the circuit of this example also includes a power supply module, such as Figure 5 The figure shows an example of a power module. The external power supply DC+15V enters the DC / DC chip U61 and is converted into DC+5V and provided to the circuit. At the same time, the DC+5V is converted into 3.3V by the linear voltage regulator chip U62 and provided to the circuit.

[0028] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application.

Claims

1. A handheld laser welder and robot communication conversion circuit, characterized in that: It includes a main control chip U68 and an RS232 module and a bus module connected to the main control chip; The RS232 module includes an RS232 chip U66, which is connected to the RS232 signal RS_T and RS232 signal RS_R of the handheld laser welder, and is connected to the TX1 pin and RX1 pin of the main control chip U68; The bus module includes a CAN isolation transceiver chip U67, which is connected to the CAN peripheral signal CAN_RX pin and CAN_TX pin of the main control chip U68. The bus signal output terminals CANH and CANL of the CAN isolation transceiver chip U67 are connected to the bus connector CN7 after passing through the filtering unit. The bus connector CN7 is used to connect to the robot.

2. The handheld laser welder and robot communication conversion circuit according to claim 1 is characterized in that: The bus signal output terminal CANH of the CAN isolation transceiver chip U67 is connected to AGND through a surge protection diode D19, and the bus signal output terminal CANL is connected to AGND through a surge protection diode D18.

3. The handheld laser welder and robot communication conversion circuit according to claim 1 is characterized in that: The filtering unit includes a capacitor C160, a common mode filter L4 and a common mode filter L5. Both ends of the capacitor C160 are connected between the bus signal output terminal CANH and the bus signal output terminal CANL, and are connected to both ends of the input side of the common mode filter L4. Both ends of the output side of the common mode filter L4 are connected to both ends of the input side of the common mode filter L5. Both ends of the output side of the common mode filter L5 are connected to the bus connector CN7.

4. The handheld laser welder and robot communication conversion circuit according to claim 3 is characterized in that: A bus terminal resistor R172 is connected in parallel between both ends of the output side of the common mode filter L5.

5. The handheld laser welder and robot communication conversion circuit according to claim 1 is characterized in that: The CAN isolation transceiver chip U67 adopts the CTM1051KT type. Its pin 4 is connected to the CAN_RX pin of the main control chip U68, pin 3 is connected to the CAN_TX pin of the main control chip U68, pin 2 is connected to GND, pin 1 is connected to +5V, pin 8 is connected to AGND, pin 6 is the bus signal output terminal CANH, and pin 7 is the bus signal output terminal CANL.

6. The handheld laser welder and robot communication conversion circuit according to claim 1 is characterized in that: A power module is also included for providing power to the circuit.

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