Central hole double-face target of observation point for whole station apparatus

• Main Authors: DINGXIANG FENG, HAO WANG, XIURUN GE
• Format: Patent
• Language: English
• Published: 25.10.2000
• Edition: 7
• Subjects: GYROSCOPIC INSTRUMENTS; MEASURING; MEASURING DISTANCES, LEVELS OR BEARINGS; NAVIGATION; PHOTOGRAMMETRY OR VIDEOGRAMMETRY; PHYSICS; SURVEYING; TESTING

The utility model provides a central hole double-face target of an observation point for a whole station apparatus, which is used as a burying piece of the observation point to be matched with the whole station apparatus to carry out displacement monitoring. The utility model is mainly composed of a metal base plate, reflecting films, a target center hole, target circle patterns, expansion bolts, wherein, the reflecting films are pasted on both sides of the metal base plate; the target circle patterns on the front and the back reflecting films are symmetrical by the metal base plate, and the center of the target circle patterns falls on the target center hole; the centers of the target circle patterns on both sides of the reflecting films are connected through the target center hole. The utility model not only can be installed in an underground tunnel and a cave depot, but also can be installed on any outdoor building and facility. The utility model provides a burying installation device which is suitable to be used in a large amount and has the advantages of good observation effect and low cost. The utility model is particularly suitable to be used for monitoring of the deformation of surrounding rock during the construction period of the underground tunnel and the cave depot.