1. Mechanical structure
The basic structure of an industrial robot includes the body, arm, wrist, and fingers. Together, these components form the robot's motion system, enabling it to be precisely positioned and moved in three-dimensional space.
- Body: The body is the main part of the robot, usually made of high-strength steel, used to support other components and provide internal space to accommodate various sensors, controllers, and other equipment.
- Arm: The arm is the main part of the robot to perform tasks, usually driven by joints to achieve multi-degree-of-freedom movement. Depending on the application scenario, the arm can be designed with a fixed axis or a retractable axis.
- Wrist: The wrist is the part of the robot's end effector that contacts the workpiece, usually composed of a series of joints and links, to achieve flexible grasping, placement, and manipulation functions.
- Fingers: The fingers are part of the robot's end effector, usually including various tools and fixtures to complete specific manipulation tasks.
2. Control system
The control system of an industrial robot is its core part, responsible for receiving information from sensors, processing this information, and sending control instructions to drive the robot's movement. The control system usually includes the following components:
- Controller: The controller is the brain of the industrial robot, responsible for processing the signals of various sensors and generating corresponding control instructions. Common controller types include PLC (Programmable Logic Controller), DCS (Distributed Control System) and IPC (Intelligent Control System).
- Driver: The driver is the interface between the controller and the motor, responsible for converting the control instructions issued by the controller into the actual movement of the motor. Depending on the application requirements, the driver can be divided into stepper motor driver, servo motor driver and linear motor driver, etc.
- Programming interface: The programming interface is a tool for users to interact with the robot system, usually including computer software, touch screen or dedicated operation panel. Through the programming interface, users can set the robot's motion parameters, monitor its operating status, and diagnose and handle faults.
3. Sensors
Industrial robots need to rely on various sensors to obtain information about the surrounding environment in order to perform tasks such as correct positioning, navigation and obstacle avoidance. Common sensor types include:
- Visual sensor: Visual sensor is used to capture images or video data of target objects, such as cameras, lidar, etc. By analyzing this data, the robot can realize functions such as object recognition, positioning and tracking.
- Force/Torque Sensor: Force/Torque Sensor is used to measure the external force and torque of the robot, such as pressure sensor, torque sensor, etc. These data are crucial for the robot's motion control and load monitoring.
- Proximity/Distance Sensor: Proximity/Distance Sensor is used to measure the distance between the robot and the surrounding objects to ensure a safe range of motion. Common proximity/distance sensors include ultrasonic sensors, infrared sensors, etc.
- Encoder: Encoder is a sensor used to measure rotation angle and position information, such as photoelectric encoder, magnetic encoder, etc. By processing these data, the robot can achieve precise position control and trajectory planning.
4. Communication Interface
In order to achieve collaborative work and information sharing with other devices, industrial robots usually need to have certain communication capabilities. The communication interface can connect the robot with other devices (such as other robots on the production line, material handling equipment, etc.) and upper-level management systems (such as ERP, MES, etc.) to achieve functions such as data exchange and remote control. Common communication interface types include:
- Ethernet interface: Ethernet interface is a universal network interface based on IP protocol, which is widely used in the field of industrial automation. Through the Ethernet interface, the robot can achieve high-speed data transmission and real-time monitoring with other devices.
- PROFIBUS interface: PROFIBUS is an international standard fieldbus protocol widely used in the field of industrial automation. The PROFIBUS interface can realize fast and reliable data exchange and collaborative control between different devices.
- USB interface: The USB interface is a universal serial communication interface that can be used to connect input devices such as keyboards and mice, as well as output devices such as printers and storage devices. Through the USB interface, the robot can realize interactive operations and information transmission with the user.
In summary, a complete industrial robot consists of multiple parts such as mechanical structure, control system, sensor and communication interface. These parts work together to enable the robot to complete various high-precision and high-speed tasks in complex industrial production environments. With the continuous development of technology and the continuous expansion of application needs, industrial robots will continue to play an important role in modern manufacturing.