Abstract
In accordance with the shortcomings of current subgrade sedimentation detection methods at home and abroad, such as non-automatic measurement, low measurement accuracy, poor stability, vulnerable to internal conditions. A new method has been designed which is based on multi-magnetic Hall sensors. In this paper, the key issues of Automatic Measurement Method have also been discussed. In the measurement of sub-grade sedimentation, the method based on Hall sensors multi-trigger and automatic control of high-precision laser distance-phase testing is implemented, which increases the accuracy of automatic measurement. The results show that the method, which is the combination of more magnetic Hall sensors trigger controlling and phase laser ranging, can be an effective measure to improve the efficiency of automatic testing subgrade sedimentation.
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