护手可以帮助稳定螺丝，内置一个寻柱设备和一个激光辅助系统。 该激光辅助系统可以在墙上投射铅垂线，辅助水平垂直定位。
The hand guard helps with screw stabilization, houses a stud finder and a laser guide to project plum lines and assist with leveling.
惯性定位系统，在惯性平台有三个互相垂直的轴，其中之一是“上”，使系统产生海拔为一体的输出。
Inertial positioning system, in which an inertial platform has three mutually perpendicular axes, one of which is "up", so that the system yields elevation as one of the outputs.
在此基础上，利用双目立体视觉系统对听觉系统定位的结果进行误差补偿，并进行垂直方位的标高角以及距离的评估。
Based on this evaluation, the survey used binocular stereo vision system to compensate the direction error, and located the elevation degree in vertical plane and the distance of sound source.
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