Accompanying controller for production line equipment

Abstract

A production line equipment accompanying controller is specially designed for displacement of a two-shaft tightening machine and is high in module integration degree, small in size, convenient to debug and not prone to errors. The product has a modular structure and a standard plug, and the servo motor is convenient and fast to control. The product is high in response speed, and each function of the controller is accurately controlled. The product adopts a mature and stable mainstream chip STM32 single-chip microcomputer in the industrial market as a main control chip, and the performance is stable and reliable.

Description

Technical Field

[0001] The utility model belongs to a follow - along controller, which is a special follow - along controller developed specifically for equipment that needs to move synchronously with the production line on the production line, especially for tire tightening machines. Background Art

[0002] At present, there are various follow - along devices on domestic production lines, and the control methods are also diverse. Some use PLCs to control servo motors to follow along, some rely on frequency converters to control DC motors to follow along, and some rely on special controllers to control servo motors to follow along by sending pulses. They each have their own advantages and disadvantages: For those controlled by PLCs through the bus method, the development cycle is short and the equipment is simple, but the cost of PLCs with bus control is very high, and the servo motors must also have bus functions; those using frequency converters to control DC motors are limited by the functions of the frequency converters and cannot perform complex controls, with low flexibility; those using special controllers to control servo motors to follow along by sending pulses have the longest development cycle for the special controllers, but because they are special controllers, they have complete functions, are stable and reliable. And this product is a controller developed specifically for following along on the production line. Summary of the Invention

[0003] In order to overcome the deficiencies of the prior art, the technical problem to be solved by the utility model is to provide a follow - along controller for production line equipment. This product is a controller designed specifically for the two - axis tightening machine for position change, with high module integration, small volume, convenient for debugging and not easy to make mistakes. This product has a modular structure and standard connectors, making it convenient and fast to control servo motors. This product has a fast response speed, and each function of the controller is accurately controlled. This product uses the mature and stable mainstream chip STM32 single - chip microcomputer in the industrial market as the main control chip, with stable and reliable performance.

[0004] The technical solution of the present utility model is that the core control circuit structure of the in-line equipment follower controller includes a key input circuit, a networking communication circuit, a serial 485 communication circuit, a travel switch input circuit, an STM32 single-chip microcomputer, an indicator light output circuit, an analog quantity output circuit, a control output circuit, an encoder input circuit, and a servo motor driver output circuit. The single-chip microcomputer is a multi-functional system-on-chip STM32 single-chip microcomputer, which is the core control unit of the core control circuit structure. The single-chip microcomputer sends signals to the servo motor driver output circuit through the analog quantity output circuit and the control output circuit, thereby controlling the forward and reverse rotation output of the servo motor; the servo motor also feeds back the encoder signal to the single-chip microcomputer through the encoder input circuit to analyze and judge the rotation speed and travel distance of the servo motor; the travel switch input circuit inputs signals into the single-chip microcomputer to obtain the positions of the in-line equipment in the original position, the end position, and the alarm position; the single-chip microcomputer indicates the voltage condition of the in-line equipment follower controller and the operation status of the system through the indicator light output circuit; the function of the key input circuit is to manually control the equipment to move forward, backward, follow, and stop, which is convenient for manually controlling the equipment to follow when not connected to the network; the networking communication circuit interacts with the production line to exchange follow-up information and accurately control the equipment follow-up situation in real time; the serial 485 communication circuit conducts serial communication with the host computer, which is convenient for downloading parameters and uploading distances and statuses.

[0005] The circuit board structure of the in-line equipment follower controller includes a 24V-to-5V power supply module, a network cable interface socket, an RS485 interface socket, a terminal block, a CPU module of the STM32 single-chip microcomputer, an input opto-isolation module, and a relay output module; the 24V-to-5V power supply module converts the input 24V voltage into a stable 5V voltage; the network cable interface socket is connected to the network of the production line to interact with the follow-up speed information of the production line in real time and accurately; the RS485 interface socket is connected to the host computer, enabling the host computer to download parameters and feedback information through this communication port; the terminal block includes various input buttons connected to the operation panel, various indicator lights, and power terminals connected to the power supply; the CPU module of the STM32 single-chip microcomputer is the core control unit of this follower controller, responsible for the input detection, output control, indicator light display, communication, and data processing of various signals; the input opto-isolation module completes the isolation function between the input buttons and the control circuit; the relay output module completes the isolation function between the output indicator lights and the control circuit.

[0006] The utility model has the following advantages: This product has a watchdog function. If there is particularly strong electromagnetic interference on-site, resulting in the abnormal operation of the system, the system can be automatically reset; this product has the function of 485 serial communication and can interact with the host computer for data; this product solves the problem that the controller is large in volume and not convenient for installation; this product has the function of input and output of IO points and can expand the input and output functions; this product has the power-off holding function and can save the current speed and position at the moment of power-off; this product has the PWM output function and can control the forward and reverse actions of the servo motor in a pulse manner; this product has the networking function and can interact with the production line for information such as speed. Description of the Drawings

[0007] Figure 1 is the core control circuit structure of the controller;

[0008] Figure 2 is the front structure of the circuit board of the controller.

[0009] Button input circuit 1, networking communication circuit 2, 485 communication circuit 3, travel switch input circuit 4, multi-functional on-chip system STM32 single-chip microcomputer 5, indicator light output circuit 6, analog quantity output circuit 7, control output circuit 8, encoder input circuit 9, servo motor driver output circuit 10, 24V to 5V power module 11, network interface socket 12, RS48 interface socket 13, wiring terminals for power supply, input and output, motor control, etc. 14, CPU module 15, input opto-isolation module 16, relay output module 17. Detailed Implementation Manner

[0010] To make the objectives, technical solutions, and advantages of the present utility model clearer, the following will further describe the implementation manners of the present model in detail with reference to the drawings.

[0011] The core control circuit structure of the in-line equipment follower controller is as Figure 1As shown, it uses the multi-functional system-on-chip STM32 single-chip microcomputer 5 as its core control unit. The STM32 single-chip microcomputer 5 controls the forward and reverse output of the servo motor 10 by outputting analog signals 7 and control output 8. The encoder signal 9 of the servo motor 10 is fed back into the STM32 single-chip microcomputer 5, thereby analyzing and judging the operating conditions of the servo motor such as rotational speed and traveling distance. The travel switch is input into the STM32 single-chip microcomputer 5 through opto-coupler isolation, so as to obtain the positions of the home position, end position and alarm position. The indicator light output 6 can indicate the voltage condition of the controller and the operating status of the system. The button input 1 can manually control the device to move forward, backward, follow, stop and other actions, which is convenient for manually controlling the device to follow when not connected to the network. The controller also has a 485 communication function. The serial 485 communication 3 can perform serial communication with the host computer, which is convenient for downloading parameters and uploading information such as distance and status. The network communication 2 is responsible for interacting with the production line to connect and exchange follow-up information, and controls the follow-up situation of the device in real time and accurately.

[0012] The circuit board structure of the production line equipment follow-up controller includes a 24V to 5V power supply module 11, which converts the input 24V voltage into a stable 5V voltage; a network interface socket 12, which can connect to the network of the production line and interact with the follow-up speed information of the production line in real time and accurately; an RS485 communication jack 13, which is connected to the host computer, and the host computer can download parameters and feedback information through this communication port; a terminal block 14, which includes various input buttons connected to the operation panel, various indicator lights connected to the display panel, power terminals connected to the power supply, and analog output, control signal, and encoder feedback signal connected to the servo driver; a CPU module 15 of the multi-functional system-on-chip STM32, which is the core control unit of this controller and is responsible for tasks such as input detection of various signals, output control, indicator light display, communication, and data processing; a controller input opto-coupler isolation module 16, which completes the isolation function between the input button and the control circuit; a relay output module 17, which completes the isolation function between the output indicator light and the control circuit.

Claims

1. A production line equipment on-board controller, the core control circuit structure includes a key input circuit (1), a networking communication circuit (2), a serial 485 communication circuit (3), a travel switch input circuit (4), a single-chip microcomputer (5), an indicator light output circuit (6), an analog quantity output circuit (7), a control output circuit (8), an encoder input circuit (9), a servo motor driver output circuit (10), and is characterized in that: The single-chip microcomputer (5) is the multi-functional system-on-chip STM32 single-chip microcomputer, which is the core control unit of the core control circuit structure. The multi-functional system-on-chip STM32 single-chip microcomputer (5) sends signals to the servo motor driver output circuit (10) through the analog output circuit (7) and the control output circuit (8), so as to control the forward and reverse rotation output of the servo motor; the servo motor feeds back the encoder signal to the multi-functional system-on-chip STM32 single-chip microcomputer (5) through the encoder input circuit (9) to analyze and judge the rotation speed and traveling distance of the servo motor; the travel switch input circuit (4) inputs signals into the multi-functional system-on-chip STM32 single-chip microcomputer (5) to obtain the positions of the in-position, end-position and alarm-position of the production line equipment. The multi-functional system-on-chip STM32 single-chip microcomputer (5) indicates the voltage condition of the production line equipment follower controller and the operation status of the system through the indicator light output circuit (6); the function of the button input circuit (1) is to manually control the forward, backward, following and stop of the equipment, which is convenient for manually controlling the following of the equipment when not connected to the network; the network communication circuit (2) interacts with the production line to exchange following information and accurately control the following situation of the equipment in real time; the serial 485 communication circuit (3) conducts serial communication with the host computer, which is convenient for downloading parameters and uploading distance and status. The circuit board structure of the production line equipment follower controller includes a 24V to 5V power module (11), a network interface socket (12), an RS485 interface socket (13), a terminal block (14), a CPU module (15) of the multi-functional system-on-chip STM32 single-chip microcomputer, an input opto-isolation module (16) and a relay output module (17); the 24V to 5V power module (11) converts the input 24V voltage into a stable 5V voltage; the network interface socket (12) connects to the network of the production line and interacts with the following speed information of the production line in real time and accurately; the RS485 interface socket (13) is connected to the host computer, enabling the host computer to download parameters and feedback information through this communication port; the terminal block (14) includes input buttons and indicator lights connected to the operation panel and power terminals connected to the power supply. The CPU module (15) of the multi-functional system-on-chip STM32 single-chip microcomputer is responsible for signal input detection, output control, indicator light display, communication and data processing; the input opto-isolation module (16) completes the isolation function between the input button and the control circuit; the relay output module (17) completes the isolation function between the output indicator light and the control circuit.

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