Space coordinate measuring device, method, recording medium and system for positioning target spot of handheld SLAM navigator in tunnel

The invention belongs to the technical field of hydraulic tunnel engineering, and particularly relates to a space coordinate measuring device and method for a positioning target of a handheld SLAM navigator in a tunnel. The distance between the two ends of the horizontal strip-shaped plate and the reflecting diaphragm and the distance between the two ends of the horizontal strip-shaped plate and the positioning target points are measured through the four laser range finder probes, space coordinates of all the positioning target points are obtained through a right triangle three-side-length relation column equation set, and a hand-held SLAM navigator can be conveniently held in a long-distance tunnel to conduct tunnel geological logging and collecting work. The invention also provides a non-transitory readable recording medium storing the program of the method and a system comprising the medium, and the program can be called through a processing circuit to execute the method. 本发明属于水工隧洞工程技术领域，特别涉及一种隧洞内手持SLAM导航仪