Rail attitude measuring method and device based on geomagnetic sensing

Abstract

The invention provides a rail attitude measuring method and device based on geomagnetic sensing. The method and device are convenient to operate, low in cost and high in precision. The measuring method comprises the steps that the direction and magnitude of a geomagnetic field and the magnitude and direction of the gravitational acceleration of a rail at any test point are measured, the azimuthal angle, pitch angle and tilt angle of the rail at the test point can be obtained through a corresponding computational formula, the direction and magnitude of the geomagnetic field can be obtained through a magnetic sensor, and the magnitude and direction of the gravitational acceleration can be obtained through a gravitational acceleration sensor, so that the detection cost is low, and the whole measuring process is quite convenient. In addition, due to the fact that the difference of the magnitude and direction of the geomagnetic field is quite weak on the surface of the earth and within the range of thousand of meters above and below the earth surface, the measurement result of the rail attitude measuring method based on geomagnetic sensing is high in accuracy, and the rail attitude measuring method and device are suitable for being applied and popularized in the technical field of rail detection.

Description

technical field [0001] The invention relates to the technical field of rail detection, in particular to a method and device for measuring rail attitude based on geomagnetic sensing. Background technique [0002] In the process of laying rails and overhauling rails, the alignment of the rails is of great significance: in most occasions, the rails need to be aligned and level; in other occasions, the rails are required to be at a certain inclination angle, curvature, and elevation angle, etc. specific posture. At present, the equipment used for alignment during the actual laying of rails is mainly a gyroscope and an optical collimator. However, the gyroscope is expensive, takes a long time to calibrate, and is troublesome to debug. After a period of time, the measurement accuracy drops greatly, and continuous calibration is required, which seriously affects the speed and accuracy of laying railroad tracks. The optical collimator has been widely used because of its high preci...

AI Technical Summary

Problems solved by technology

However, the gyroscope is expensive, takes a long time to calibrate, and is troublesome to debug. After a period of time, the measurement accuracy drops greatly, and continuous calibration is required, which seriously affects the speed and accuracy of laying railroad tracks.

The optical collimator has been widely used because of its high precision. However, the optical collimator can only measure whether the rail is a straight line, and cannot measure the specific parameters such as inclination angle, curvature, and pitch angle of each rail. Moreover, it is not suitable for environments with many obstacles, and there are problems such as difficult debugging and high quality requirements for operators.

Therefore, the current technology does not have a rail alignment detection technology that is easy to operate, low in cost and high in accuracy.

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