Real-time Precision Measuring Device Of Tree Diameter Growth

Forest carbon sink is the most effective way to slow down the global warming and build a negative carbon emission society, and the measurement of carbon sinks provide a fair and effective protection for carbon trading. The basic of measurement of carbon sinks is the real time acquisition of forest resou rce information,which access to real-time information of the data relate to forest accurately and timely. In the survey, the measurement of DBH(diameter at breast height) is the most important content. T he traditional ways of investigation took long peri od, and poor timeliness, so instead of manual field measurements, the real-time remote monitoring technology of tree growth information can solve the artificial investigation of the problem of long cycle of data acquisition, and its data can be used as a basis for measuring forest carbon amount, provide a technical support to the tracing method of forest carbon sink. T his topic intends to start with the development of the precision measuring device of plant growth, to study the relationship between the micro-variation of plant diameter and the environment temperature, air humility and photosynthetically active radiation(PAR), and get the response mechanism of plant diameter on the environment.The main research works are shown as follows:Firstly, for the measurement of the plant growth, the real-time measuring device of the tree diameter was developed. T he fixture measuring device and hardware circuit for this tree diameter were designed, the software programs and the PC interface were wrote, which realize the accurate measurement of tree diameter and the environmental parameters.Secondly, to testing the instrument, a measuring device was build for the calibration test of the magnetic grating sensor and inductance sensor, and it can also be used to determine the static parameters of each sensor, for analysis the detection accuracy of instrument for tree diameter and its micro-variation.Finally, in order to explore the influence of environmental parameters(environment temperature, air humility an d PAR) difference on the i nfluence of tree diameter, experiment were conducted. Based on experiments data, the correlations between the mature trees diameter, the environment temperature, air humility and PAR was obtain.The research of this paper provide the experimental and theoretical basis for response of plants to environment and precision forestry research.