RFID automotive application: How to achieve efficient body identification on the automotive painting production line

Automobile painting production line is usually a relatively closed environment to keep the working area clean and safe. In the painting production line, various chemicals and coatings are involved, so strict safety measures are required to ensure the health and safety of employees. In this working environment, body recognition technology can improve production efficiency and quality, and reduce human errors and defects.

In the automobile painting production line, the commonly used body recognition technologies mainly include the following:

Machine vision recognition technology: The machine vision system will scan and detect the surface of the car body to identify the coating quality and defects on the body surface. This technology can automatically detect problems such as coating thickness, color difference, sagging, pitting, potholes, and air bubbles. At the same time, the machine vision system can also identify parts, classify and manage them.

optical recognition technology: In the painting production line, the code disc recognition technology is mainly used in the positioning and control of the car body. The code disc is a kind of mark fixed on the production line. By detecting the position and motion state of the code disc, the accurate positioning and control of the car body can be realized. The steel barcode recognition technology is mainly used in the tracking and management of auto parts. By scanning and identifying steel barcodes, automatic management and tracking of parts can be realized.

Lidar recognition technology: Lidar technology can be used for three-dimensional scanning and detection of car bodies. By scanning the surface of the car body with lidar, the 3D point cloud data of the car body can be obtained, and the point cloud data can be further processed and analyzed to identify defects and problems on the car body surface.

With the maturity of RFID technology, more and more OEMs use RFID technology to collect body information. RFID can realize automatic data collection in the harsh environment of painting, and has good compatibility and stability.

The RFID car painting production line mainly relies on the code carrier installed on the car body skid and the RFID Antenna fixed on the roll bed at a key position in the workshop to identify and track the car body. Each RFID antenna is called a station, responsible for reading and writing the code carrier, and transmitting the information to the PLC through the underlying equipment transmission network. There is a code carrier installed on the skid in the painting workshop, which records the information of the car body, such as model, color, quality problem, batch number and serial number, etc. At the on-line of the painting workshop, that is, the No. 1 station, write the code carrier until it is cleared at the off-line of the workshop or after changing the skid. The information written into the code carrier will be used as the vehicle body information, which will be identified and tracked when the vehicle body passes through the entire workshop.

The body recognition technology used in the painting production line can help workers quickly and accurately identify the vehicle model, color, painting scheme and other information, and accurately locate the position and path of paint spraying. At the same time, the body recognition technology can also help the painting robot to avoid body parts or signs when spraying, so as to avoid spraying errors or defects, thereby improving the quality and efficiency of painting. Therefore, vehicle body recognition technology is very important in the painting production line.