1. Self-powered wireless plant health monitoring system detects circadian rhythm using sap-activated battery
- Author
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Fumiyasu Utsunomiya, Takakuni Douseki, Ryoma Furumori, Ami Tanaka, and Syuuichi Okamoto
- Subjects
Computer science ,business.industry ,Transistor ,Electrical engineering ,Battery (vacuum tube) ,Monitoring system ,law.invention ,law ,Wireless ,Circadian rhythm ,business ,Water content ,Wireless sensor network ,Voltage - Abstract
A wireless plant health monitoring system composed of a self-powered wireless sensor and a receiver has been developed that detects a circadian rhythm related to sap flow including soil moisture conditions. The sensor, which has a sap-activated battery that has an iron nail with a diameter of 1 mm and an intermittent-power-supply circuit that performs power-gating operation with boosted voltage and reduces the leakage current to 0.1 nA, makes it possible to perform a sensing operation. We fabricated a prototype system and verified that the intervals between the received signals have a circadian rhythm while they gradually increased.
- Published
- 2017
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