@article{ref1,
title="Study on cross terms suppression of tunnel blasting vibration signals and time of detonator delay",
journal="China safety science journal (CSSJ)",
year="2021",
author="Fu, X. and Yu, J.",
volume="31",
number="12",
pages="53-61",
abstract="In order to solve the difficulty in eliminating cross terms in time-frequency domain of tunnel blasting vibration signals as they tend to be influenced by test environment, MP-SPWVD combination algorithm was adopted to effectively suppress cross terms in time-frequency spectrum of micro-delay blasting vibration signals. At the same time, time-energy density method was adopted to accurately determine actual delay time of each section of detonators in tunnel initiation networks. The results show that MP-SPWVD algorithm can effectively reduce adverse effects of cross terms on signal energy amplitude and local region characteristics. Actual delay time between detonator segments can be adaptively judged by time-energy density distribution of MP reconstructed signal, which has a good application prospect. Moreover, delay discrimination accuracy of detonators is closely related to delay time. © 2020 China Safety Science Journal. All rights reserved.<p /><p>Language: zh</p>",
language="zh",
issn="1003-3033",
doi="10.16265/j.cnki.issn1003-3033.2021.12.008",
url="http://dx.doi.org/10.16265/j.cnki.issn1003-3033.2021.12.008"
}