High-precision pendulum bob field intensity type inclinometry system for monitoring and method

Abstract

The invention discloses a high-precision pendulum bob field intensity type inclinometry system for monitoring and a method. The system comprises a first magnetic sensor, a second magnetic sensor, a fixing point, a pendulum line, a pendulum bob, an electromagnetic coil and a power supply, wherein the pendulum bob is connected with the fixing point through the pendulum line; the electromagnetic coilis arranged on the pendulum line; when the system is kept upright, the first magnetic sensor and the second magnetic sensor are respectively fixed on two sides of the electromagnetic coil, and the power supply is connected with the first magnetic sensor, the second magnetic sensor and the electromagnetic coil respectively. According to the system, an inclination angle is calculated according to variation of relative spaces between the electromagnetic coil and the magnetic sensors on two sides along with dip angles, the system is simple in structure, the measurement precision of the magnetic sensors is not highly required, and the measurement result consistency is ensured; meanwhile swinging resistance can be also reduced through the pendulum bob and the pendulum line, the measurement precision is improved, and the hardware cost is reduced. The high-precision pendulum bob field intensity type inclinometry system for monitoring and the method can be widely applied to field of engineering detection.

Description

technical field [0001] The invention relates to the field of engineering detection, in particular to a high-precision pendulum field strength type inclinometer system and method for monitoring. Background technique [0002] Deep horizontal displacement monitoring is a must-test item for second-level and above monitoring safety level projects, and is widely used in safety monitoring of foundation pits, tunnels, slopes, foundations, rail transit, tailings, and dam projects. As far as building foundation pits are concerned, according to Table 4.2.1 of the "Technical Specifications for Monitoring of Building Foundation Pit Engineering" (GB50497-2009), the deep horizontal level of the first and second-level building foundation pits should be measured, and the level of the third-level building foundation pits should be measured. ;According to Table 4.2.1 of "Technical Specifications for Urban Rail Transit Engineering Monitoring" (GB50911-2013), the monitoring safety level is first...

AI Technical Summary

Problems solved by technology

[0007] The realization of the existing deep horizontal displacement mainly relies on the measurement of the inclination sensor and the accelerometer. In the movable inclinometer system, the accuracy and stability of the inclination sensor are greatly affected by factors such as temperature and vibration; while the accelerometer measurement principle device is mostly Imported equipment, high cost of use

In the prior art, for example, a magneto-resistive inclination sensor (CN2466604Y), its technical solution uses a single sensor with a bearing and a weight to achieve it. In order to avoid the influence of bearing friction, it is necessary to use high-quality, high-cost bearings. At the same time, In practical applications, due to the errors in the parameters of batch electronic components, it is easy to cause errors in the measurement results between different inclination sensors and reduce the detection accuracy. Pit, tunnel, slope, foundation, etc. are tilted, which seriously affects the construction of the project

Images