The construction quality of the bolt is directly related to the safety of theproject. The construction quality of the bolt anchorage must be tested. In thispaper, the improved complete ensemble empirical mode decomposition (ICEEMD)method is introduced into the bolt detection signal analysis. The ICEEMD isused to decompose the anchor detection signal according to the approximateentropy of each intrinsic mode function (IMF). The noise of the IMFs iseliminated by the wavelet soft threshold de-noising technique. Based on theapproximate entropy and the wavelet de-noising principle, the ICEEMD-De anchorsignal analysis method is proposed. From the analysis of the vibration analogsignal, as well as the bolt detection signal, the result shows that theICEEMD-De method is able to correctly separate the different IMFs under thenoisy condition, and the IMF can effectively identify the reflection signal ofthe end of the bolt.
展开▼
