Design of wind tunnel temperature and humidity data acquisition system based on CAN/SimpliciTI hybrid network

In order to obtain the temperature and humidity information of the Test section in the low-speed flue gas wind tunnel in real time, a low-power wind tunnel temperature and humidity data acquisition system based on CAN/SimpliciTI hybrid network is designed. The CAN network is used as the main network, while the SimpliciTI low-power wireless sensor network as the sub-network. The terminal ED nodes of sub-network acquire the ambient temperature and humidity information of the location and then transmit them to the gateway node by wireless mode. In the gateway node，the SimpliciTI messages are converted into CAN messages, and finally, they are delivered to the main network. The host computer communicates with the gateway node through the CANalyst-II protocol analyzer, and finally gets the temperature and humidity information of each ED terminal. Compared with the traditional bus type communication system, the system has the advantages of less wiring, simple network hardware, low power consumption, and convenient maintenance.