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在林业调查、公路敷设、整治河道等工程技术里,尤其在踏勘工作中,常常需要进行估测。而常用的目测、手测、步测、手尺等估测技术,多受经验的限制,既不易掌握,又不能达到一定的精度。所以,改进目测工具,减小估测误差,是非常必要的。无标尺测距仪结构简单,制作方便,单人可以操作,在百米之内还比较准确。只要瞄准所测目标,便可通过刻度直接读出距离。在遇有河道、沟壑的情况下,使用起来更显得方便。一、结构无标尺测距仪结构如图1。1为瞄准尺,供瞄准所测目标用,与主杆垂直。2为接目
In the field of forestry investigation, road construction, river regulation and other engineering techniques, especially in reconnaissance work, it is often necessary to make an estimation. The commonly used visual inspection, hand measurement, step measurement, hand ruler and other estimation techniques, more limited by experience, is not easy to grasp, but also can not achieve a certain degree of accuracy. Therefore, it is very necessary to improve the visual inspection tools and reduce the estimation error. Ruler-free range finder simple structure, easy production, single operation, within a hundred meters still more accurate. Just aim at the measured target, you can read the distance directly through the scale. In the case of rivers, ravines, it is more convenient to use. First, the structure without ruler Rangefinder structure as shown in Figure 1.1 aiming ruler for targeting the measured target, perpendicular to the main rod. 2 for the purpose