High-accuracy pendulum bob and resistor type inclination measuring device and high-accuracy pendulum bob and resistor type inclination measuring method for monitoring

Abstract

The invention discloses a high-accuracy pendulum bob and resistor type inclination measuring device and a high-accuracy pendulum bob and resistor type inclination measuring method for monitoring. Thedevice comprises a power source, an arc-shaped resistor and a pendulum bob. The arc-shaped resistor is arranged fixedly. A fixed point is arranged at the circle center position of the arc. The pendulum bob is connected to the fixed point through a line longer than R, wherein the R is the radius of the corresponding circle of the arc. An electric-conducting contact electrode is arranged on the line. The arc-shaped resistor contacts with the contact electrode electrically when the plane, where the arc is located at, is perpendicular to the horizontal plane. A first electrode and a second electrode are arranged at two ends of the arc-shaped resistor. The power source is connected with the first electrode and the second electrode. Dip angle data can be calculated according to the proportion oftwo resistances of the arc-shaped resistor, requirements on parameter uniformity of resistor elements are low, cost is low, and accordingly, the device and the method are suitable for large-scale production. The high-accuracy pendulum bob and resistor type inclination measuring device and the high-accuracy pendulum bob and resistor type inclination measuring method can be widely applied to the field of engineering detection.

Description

technical field [0001] The invention relates to the field of engineering detection, in particular to a high-precision pendulum resistance type inclinometer 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 and second...

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. The accuracy and stability of the inclination sensor in the movable inclinometer device are greatly affected by factors such as temperature and vibration; while the accelerometer measurement principle device is mostly Imported equipment, high cost of use

For example, a magneto-resistor type inclination sensor (CN2466604Y), wherein the magneto-resistor is used to measure the inclination angle without contact, but the bearing structure is still used in its structure, it is difficult to eliminate the influence of friction, and it cannot guarantee low cost to achieve high precision; for example The gas pendulum type inclinometer (CN2160886Y), which adopts a thermistor, requires a large temperature coefficient of resistance and good stability, and cannot guarantee high precision at low cost; while the electrolyte type inclinometer in the prior art utilizes immersion in the electrolyte It works on the principle that the depth of the electrode changes with the inclination angle. The electrolyte may volatilize and cause changes in its concentration or electrolyte volume, which affects the measurement accuracy. Therefore, it requires high sealing performance and increases its hardware cost.

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