Discussion on a GNSS/accelerometer data fusion method
Aiming at the problems that the basket safety monitoring method that is the key technology in the process of construction closing mainly uses traditional equipment such as total station and level,which have high personnel cost,low efficiency and are difficult to meet the requirement of real-time monitoring,the paper proposed a GNSS/accelerometer data fusion method:it was analyzed that global navigation satellite system(GNSS)has been widely used in deformation monitoring because of its advantages such as no visibility,all-weather and direct measurement of three-dimensional coordinates of points,but it is not sensitive to high frequency vibration due to the factors such as multi-path,sampling rate and so on,while accelerometers have the advantages of high sampling rate and stable performance,but they are not sensitive to low frequency information;and then combining with the advantages of the two sensors,a multi-rate robust Kalman filtering method based on Rauch-Tung-Striebel(RTS)smoothing was used to fuse GNSS and acceleration data.Experiments result showed that the method could effectively improve the sampling rate and accuracy of GNSS hanging basket vibration monitoring.
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