Single-shaft three-dimensional surveying mark assembly for railway

• Main Authors: WANG GUOMIN, ZHANG JINLONG, ZHANG YINHU, LU JINTAO, MA WENJING, SHANG LIJUN, ZHANG JIANG
• Format: Patent
• Language: Chinese; English
• Published: 04.08.2010
• Subjects: GYROSCOPIC INSTRUMENTS; MEASURING; MEASURING DISTANCES, LEVELS OR BEARINGS; NAVIGATION; PHOTOGRAMMETRY OR VIDEOGRAMMETRY; PHYSICS; SURVEYING; TESTING

The single-shaft three-dimensional surveying mark assembly for a railway comprises a cylindrical embedded part, a prism insertion hole surveying rod, a prism insertion rod surveying rod and a level surveying rod. Internal thread connection holes are internally formed at the upper end of the embedded part; threaded rods connected with the internal thread connection holes at the upper end of the embedded part in a matched manner are respectively arranged at the lower ends of the prism insertion hole surveying rod, the prism insertion rod surveying rod and the level surveying rod; a prism mounting hole is internally formed at the upper end of the prism insertion hole surveying rod; and an annular groove is formed at the lower part of the upper end of the prism insertion rod surveying rod. The surveying mark assembly further comprises screw caps connected with the internal thread connection holes at the upper end of the embedded part, and protective nuts connected with the threaded rods at the lower ends of the p