摘要：At present, the energy problem has become one of the hotspots in the research of wireless sensor networks. In this paper, the design scheme of low-power technology is adopted by using real-time clock to control the on-off power supply, so that the dormancy power consumption of sensor nodes can be reduced to uA level, and the energy consumption of sensor nodes can be solved to the maximum extent. At the same time, the sensor interface of the sensor node designed in this paper has universality and is very suitable for environmental monitoring applications. After systematic test, it can be proved that the maximum working current of sensor nodes can reach 34.75mA and 0.0008mA in the system sleep state. If the acquisition is carried out every half hour, each time only needs 150s, and the power consumed by the sensor node every half hour is 1.4454mAh. The capacity of lithium battery is calculated according to the nominal value of 3800mAh. Without considering the self-discharge of the battery, the sensor node can work for 55 days without energy supplement. It is further verified that the wireless sensor network nodes can meet the requirements of long-term environmental data acquisition tasks in the field.
