Protective device of surveying instrument

• Main Authors: LI CHAO, ZHAO DONGLIANG, BAO YANHUI, LI HONGCHAO
• Format: Patent
• Language: Chinese; English
• Published: 22.12.2020
• Subjects: ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS,e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES,DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; CONVEYING; HANDLING THIN OR FILAMENTARY MATERIAL; PACKAGES; PACKAGING ELEMENTS; PACKING; PERFORMING OPERATIONS; STORING; TRANSPORTING

The utility model relates to the technical field of surveying and mapping instruments, in particular to a protective device of a surveying and mapping instrument, which comprises a loading box body for placing the surveying and mapping instrument, a cavity sealing structure is arranged inside the loading box body, and an evacuation unit for exhausting gas in the loading box body is arranged on theouter surface of the loading box body. Wherein the length of the evacuation unit can be adjusted through the change of air pressure in the box body, a measuring unit used for marking the length of the evacuation unit is installed on the evacuation unit, and the protection device of the surveying instrument can judge whether the waterproof capacity of the box body is invalid or not. 本实用新型涉及测绘仪器技术领域，具体为一种测绘仪器的保护装置，包括用于放置测绘仪器的装箱体，所述装箱体的内部为空腔密封结构，所述装箱体的外表面安装有用于排出所述装箱体内气体的抽空单元，并构成通过装箱体内气压的变化使得所述抽空单元长度可调节的结构，所述抽空单元上安装用于标示所述抽空单元长度的测量单元，本一种测绘仪器的保护装置可判断装箱体防水能力是否失效。