Study On The Real-time Monitoring Technology Of Bioelectricity In Standing Tress And Environmental Information Based On GPRS

There are stable electric potential difference between the living trees and its sustained soil, but the mechanism is not clear. To monitor the data of bioelectricity in standing trees continuously on24-hour basis, analysis its changing law and its relationship with environmental parameters, and draw effective conclusions, which can provide theoretical basis for follow-up study and use proper micro energy collection technology to collect this micro energy and use it. Based on the background above, this paper, as a part of national natural science funds, studies collecting and monitoring technology of bioelectricity in standing trees and its environmental information, and the main results are summarized as follows:1. Do artificial measurement research on bioelectricity in standing trees of typical trees(ash trees and gutta percha trees) in the campus of Beijing Forestry University, constitute the circuit by connecting a load resistance of12kΩ in series between the living trees and soil, measure that current and voltage of bioelectricity in standing trees across on both ends of the load resistance are respectively on the level of μA(below100μA) and mV (below1000mV), and obtain the energy level range of bioelectricity in standing trees, which provides the basis for follow-up circuit design of collection, boosting the voltage and storage.2. To collect the maximal and stable electric energy, experiments research the influence of copper, aluminum, iron and other materials and the dimensions of the end electrodes in the soil on electric energy collection. Experiments indicate that larger electric energy can be obtained by using the copper plate electrodes whose dimensions are100mm*100mm*3mm.3. Research a wireless system of collecting and monitoring the parameters of bioelectricity in standing trees and its environmental information on the basis of GPRS. This system can do remote and wireless collection of the voltage of bioelectricity in standing trees, the temperature and humidity in the air, the temperature and humidity in the soil and the parameters of the sun light intensity information, with adjustable time intervals in collection and the system relative error of about2%, which provides the technical support for the research of the mechanism in producing bioelectricity in standing trees.