提出应采取合理设置光电隔离电路、隔离光电耦合器两侧的电源、设置必需的上拉电阻、总线阻抗匹配、增加抗干扰等措施，提高了CAN 总线接口电路的可靠性与安全性。-Should be set up to take reasonable photoelectric isolation circuit, isolation optocoupler on both sides of the power supply, set up the necessary pull-up resistors, bus im