| In a complex environment with limited space,it is of great significance to use the wireless communication system to detect the health of the equipment in the cabin.The wireless mesh network has the characteristics of flexibility,multi-hop,and low cost,and has gradually become a mainstream wireless sensor network.This paper builds a wireless communication system applied in the cabin on the basis of the wireless mesh network.In addition,the wireless mesh node is completely dependent on battery power supply,and the limited battery power and the high cost of replacing the battery.In response to these problems,this paper has designed the low power consumption of the system.The main research work of this article mainly includes the following three aspects:First,a low-power mesh hardware system is designed.Analyzed the application scenarios for the wireless communication system,and selected the Wi-Fi chip ESP32 with a higher communication rate as the networking chip;for the system energy supply module,a dual power supply scheme was designed,where the main battery energy is insufficient to maintain the node When working,it can automatically and smoothly switch to the backup battery,and can also replace the battery during the node operation without affecting the normal operation of the node;a high-precision analog-to-digital conversion circuit is designed to collect sensor vibration data.Low-power devices are selected for the design of the hardware system.Secondly,the software design of the low-power wireless mesh network is carried out.Build a wireless mesh network according to the mesh protocol;realize network clock synchronization according to the TPSN protocol,and achieve synchronous sleep and wakeup of nodes in the network based on clock synchronization;using a power control mechanism to enable the wireless mesh node to automatically adjust the transmission power to reduce Node energy consumption and the purpose of improving network performance.Finally,the low-power wireless mesh network was tested.The system can normally realize the formation of the network,synchronous sleep and wake-up,and adaptive adjustment of the transmission power to meet the communication requirements in the cabin. |
