Research and Design on the Can Bus Optical Fiber Communication Converter for Strong Electromagnetic Interference and High Efficiency

The CAN bus data communication module is increasingly widely used in the maintenance robots for coal mine mechanical and electrical equipment. In response to the issue of susceptibility to electromagnetic interference in severe environments, we have proposed a CAN bus converter scheme based on fiber optic transmission. The scheme uses the STM32F103 CPU as the core to design a CAN bus fiber optic converter, which, in conjunction with the CAN bus interface circuit, can convert electrical signals into optical signals, enabling long-distance, anti-interference data communication through fiber optics. It is suitable for harsh environments such as coal mines, greatly expanding the application of the CAN bus data communication module in industrial robots. The article outlines the circuit structure, principles, hardware, and software design, and verifies the accuracy of the scheme and the reliability of communication through experiments.