Beidou dam deformation monitoring is not beidou satellite precise positioning of a specific application, the whole system to do a precise measurement, need a complete set of equipment coordination can be achieved, including input type
level gauge used for liquid level measuring instrument such as the role of also to be reckoned with, main effect is through the change of water level to measure the deformation of the dam.
This paper mainly introduces the composition of beidou dam deformation monitoring system structure, data processing flow, and the use of positioning data processing method of error correction model to improve monitoring accuracy.
Beidou satellite data to data processing center by communication network, calculating data to get the relative displacement of the monitoring points and the base station so as to achieve the purpose of monitoring the dam deformation.
Introduction beidou dam deformation monitoring is mainly using beidou difference positioning way, in a known information such as latitude and longitude of the reference station set up high-precision beidou receiver, set on the dam dam if ten high precision beidou receiver devices such as monitoring, at the same time the same beidou satellite observations, obtain the corresponding beidou satellite data.
Beidou satellite data to data processing center by communication network, calculating data to get the relative displacement of the monitoring points and the base station so as to achieve the purpose of monitoring the dam deformation.
1 beidou dam deformation monitoring system of beidou dam deformation monitoring system consists of data acquisition subsystem, communication network, data analysis and processing center, remote monitoring platform, etc.
1.
1 data acquisition subsystem data acquisition subsystem consists of a reference station and monitoring.
Function of data acquisition subsystem is: collecting the benchmark station and monitoring station location information, and regularly send data to the data processing center.
Base station is the benchmark of the monitoring system for reference, to be built on stable bedrock, base station installation precision beidou receiver satellite observation data.
Monitoring stations distributed on the whole deformation area feature points, namely in the dam body and manage multiple precision beidou receiver by electronic data acquisition host and electronic sensor for monitoring station.
1.
1.
Host 1 data collection data acquisition characteristics of the host is as follows: (1) high precision satellite receiver output a large amount of data, cache larger, communication link is broken when the need to save a large amount of data, wood requirements attached TF memory as beidou data storage.
MCU selects a ST company (
皮质-
The M3 chips.
Host (2) data acquisition with high precision beidou satellite receiver inside a metal shell, connection and high precision of beidou receiver serial port without lightning protection processing, using common serial port.
RT1 RS232 connection beidou receiver}
JL, beidou data.
(3) to isolate 485 main connection interface electronic level sensor, vertical displacement sensor, interface level meter of 485 and 485 interface rainfall sensor, the soil humidity sensor, etc.
(4) front-end ports used to connect with protective device communication network, send the beidou positioning data to the data processing center and external sensor data.
⑤ 4-
Used for bonding 4-20 ma analog signal input port
20 ma output interface of rainfall sensor, water level gauge, the soil humidity sensor, etc.
The input signal after current/voltage transform into digitize MCU A/D converter.
6. Many tilting sensor output pulse signal, such as rainfall can count pulse input port access.
Count pulse passes through the ordinary MCU I/O port, combined with the internal timer counter statistics of rainfall.
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