摘要
目前,常用于野外作业的测高仪有机械光学类和电子类两种,机械光学类的测高器结构简单,存在着较大的读数误差;激光测距仪主要以测距为主,测高的误差较大;超声波测高器是以超声波完成距离测量,再辅助角度数据计算树木高度,仪器分为主机和反射器两部分,测量时,较为繁琐;新型便携式树木测高仪,内置了带温度补偿的MEMS倾角传感器和相位式激光测距,并辅助以全息激光瞄具,具备智能、精准、携带方便、操作简单等优点。通过与激光测距仪和超声波测高仪的对比测试,在测高的精度方面,树木测高仪的精度和超声波测高仪基本相当,但要优于激光测距仪;在测距离的精度方面树木测高仪的精度和激光测距仪的基本相当,但要优于超声波测高仪。
At present,the altimeter commonly used in field survey can be divided into two types:mechanical/optical and electronical altimeter.The mechanical/optical altimeter has a simple structure and there is a large reading error.The laser range finder is mainly based on the distance measurement and the error of the height measurement is large.The ultrasonic altimeter uses ultrasound waves to complete the distance measurement,and then the angle data is used to calculate the height of the tree.The device is divided into two parts:the main body and the reflector.Therefore,the measurement process is complicated.The new portable tree altimeter has a built-in temperature compensated MEMS tilt sensor and phase laser ranging.It is also equipped with a holographic laser sight.The tree altimeter is intelligent,precise,portable and easy to use.Through comparison with laser range finder and ultrasonic altimeter,the accuracy of the height measurement by the tree altimeter is basically the same as that of the ultrasonic altimeter,but it is better than the laser range finder;the accuracy of the distance measurement by the tree altimeter is basically the same as that of the laser range finder,but it is better than the ultrasonic altimeter.
作者
王六如
尹洪波
WANG Liuru;YIN Hongbo(Academy of Forest and Grassland Inventory and Planning,National Forestry and Grassland Administration,Beijing,100714;Harbin Optical Instrument Factory Co.,Ltd.,Harbin,Heilongjiang 150010)
出处
《林业资源管理》
北大核心
2019年第6期132-136,共5页
Forest Resources Management
