Multi-node super-long deep part displacement monitoring system based on RS485 bus technology

Abstract

The invention discloses a multi-node super-long deep part displacement monitoring system based on the RS485 bus technology.The multi-mode super-long deep part displacement monitoring system comprises N multi-mode acceleration sensor units, N 485 digital relay control units and a wireless data collecting and transmitting device, wherein N is larger than 1.The acceleration sensor units and the 485 digital relay control units are connected through 485 buses.All point positions and layer positions of deep drilling are subjected to three-dimensional static displacement measurement, N 485 digital relays control the N multi-mode acceleration sensor units in a matched mode to ensure that the current of a power supply circuit can be switched on and switch off in sequence through all the units, the current is transmitted to all acceleration sensors in sequence to the tail end of the whole string of sensors, and thus the 485 buses can be used in sequence.According to the multi-node super-long deep part displacement monitoring system and a monitoring method, deep displacement can be captured for a long term for deformation measurement, installation is easy and convenient, manufacturing cost is low, the monitoring system and the monitoring method are suitable for the situation of China and wide application, and great significance is achieved on monitoring and early-warning of geological disasters.

Description

technical field [0001] The invention relates to the field of three-dimensional deformation monitoring of landslide drilling, and belongs to deep displacement monitoring equipment for geotechnical engineering, in particular to a multi-node ultra-long deep displacement monitoring system based on RS485 bus technology. Background technique [0002] In the monitoring of deep displacement of landslides, the traditional measurement method often uses a sliding inclinometer or a fixed inclinometer to monitor the deep deformation of the slope. The pull-sliding inclinometer measures the inclination displacement inside the borehole at fixed lengths and fixed points on the guide rail of the inclinometer pipe, so as to grasp the deformation inside the borehole. However, both the sliding inclinometer and the fixed inclinometer have their own defects: the fixed inclinometer has high precision and can carry out long-term monitoring along with the slope deformation, but the fixed inclinometer...

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Problems solved by technology

However, both the sliding inclinometer and the fixed inclinometer have their own defects: the fixed inclinometer has high precision and can carry out long-term monitoring along with the slope deformation, but the fixed inclinometer can be installed in the same deep displacement drilling to measure The number of points is limited; the sliding inclinometer itself has high measurement accuracy, but with the continuous evolution and deformation of the landslide, the inclinometer pipe in the borehole is either broken or squeezed and deformed. At this time, the sliding inclinometer cannot sink into the borehole. measurement in the hole

However, the installation structure of foreign products is complex, requiring corresponding installation space, and the equipment cost and installation cost do not meet the national conditions of geological disaster monitoring in my country. Simple and cheap monitoring equipment is particularly important

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