手持式高精度立木胸径测量设备设计与试验

Design and Experiment of Portable High Precision Equipment for Tree Diameter Measurement

为了在森林资源调查中快速、高效、精准地测量立木胸径,提高调查作业的工作效率,设计了一种手持式高精度立木胸径测量设备。该设备集成了中央处理器、胸径传感器、液晶显示屏、存储器、无线通讯模块等,其中,胸径传感器是利用电子技术和机械原理将测量长度信息转换为电压信号,由中央处理器处理计算得到胸径测量值。该设备以无线通讯方式配合载有数据接收端的智能手机协同使用,可实现胸径的测量、编码、记录、编辑、存储和导出等功能。野外试验结果表明,该设备在不同树种间的立木测量精度均不小于99.97%,符合国家森林资源连续清查工作的测量精度标准,测量效率达传统测径围尺工作效率的2倍以上。

In order to measure the tree diameter at breast height（DBH） rapidly,efficiently and accurately,and improve the work efficiency of forest resource investigation,a portable high precision equipment for measuring tree DBH was developed. This equipment was integrated by central processing unit（CPU）,DBH sensor,liquid crystal display（LCD）,storage,wireless communication module and so on. The DBH sensor was developed independently by this experiment. The principle of the DBH sensor was to convert the measured length information into voltage signal by using electronic technology and mechanical principle. The voltage signal would be calculated by CPU and the measured value of DBH was obtained. Wireless communication was used to cooperate with the mobile phone that installed with the data receiving terminal APP. It can achieve the functions of DBH measurement,data encoding,data recording,data editing,data storage and data export. According to the results of the test data,the measurement accuracy of this equipment for different tree species reached more than 99. 97%. This device can adapt to different kinds of trees and different diameter trees,which accorded with the national survey accuracy standard of continuous forest inventory. And the measuring efficiency of this equipment was more than twice higher than that of traditional diameter gauge.