Abstract
Food security is related to national security and people's life. Using modern information technology to monitor the growth process of crops for fine management is an effective strategy to improve agricultural output. Here, a self-powered multichannel wireless agricultural sensing system based on pulsed triboelectric nanogenerator of corn husk composite film (CH-Pulsed-TENG) is developed. Corn husk has the advantages of wear-resisting, moisture-proof, pollution-free, and biodegradable, and CH-Pulsed-TENG has an output voltage and transferred charge of 3.2 kV and 300 nC, respectively. By integrating CH-Pulsed-TENG, passive power management circuit (PMC), voltage regulator circuit (VRC), sensors, signal transmitter and receiver, a self-powered multichannel wireless agricultural sensing system is developed. The energy storage efficiency of the passive PMC can reach 54.5%. Four different signals of temperature, humidity, light intensity, and soil moisture of the farmland can be simultaneously collected and transmitted, reaching a maximum wireless transmission distance of 1.7 km. Also, the self-powered sensing system is demonstrated to be driven by wind energy. The self-powered agricultural sensing system can not only continuously detect the environmental information of farmland, but also recycle the abandoned crops, having potential application in developing intelligent green agriculture.
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