| 摘要 |
The present invention relates to a CAN bus explosion proof node structure (100). The CAN bus explosion proof node structure (100) comprises a physical parameter sensor (110), a physical parameter measurement circuit (120), a master controller (130), a data storage module (140), a communication interface module (150), and a power voltage and current limiting module (160). The physical parameter sensor (110) collects one or more physical parameters and converts them into electrical signals. The physical parameter measurement circuit (120) converts the electrical signals of various physical parameters into digital signals via filtering, amplification, signal conditioning, and analog-to-digital conversion. The master controller (130) performs respective service processing to the digital signals, compares them with respective threshold levels to determine whether dangerous situations occur for the explosion proof node, and sends out an alarm when dangerous situations occur for the explosion proof node. The data storage module (140) is configured to store respective threshold levels of the various physical parameters. The communication interface module (150) is configured to transmit the processed digital signals. The power voltage and current limiting module (160) connects to the physical parameter measurement circuit (120) and inputs a power supply, and limits a maximum open circuit voltage and a maximum short circuit current of the power. By limiting voltage and current power in internal circuits in the explosion nodes, the CAN bus explosion proof node structure ensures that the dangerous combination of explosive gas and dust would not be lighted when the nodes are in normal operation or have failures occurred so as to implement intrinsic safety. A CAN bus explosion proof network is also disclosed. |
