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经过二十多年的野外实践以后,在连续震动技术中非常广泛地使用的信号保留了原始的所谓线性扫描。由于采用了更加完善的信号设计技术,多数情况下,可期望获得显著改进。本文的目的是对信号设计以及那些较普遍的线性扫描的已知特征的基本概念作一评述。分析了非线性扫描的几种特殊类型,从野外试验的结果来看,似乎证实了分析得出的结论。在简单地考虑了另一类型的非线性信号——一种特殊的伪随机扫描变化之后,作者用他自己的观点总结了非线性信号设计在未来的连续震动技术发展中可能起到的作用。
After more than two decades of field practice, the very widely used signal in continuous vibration technology preserves the original so-called linear sweep. Due to the more sophisticated signal design techniques, a significant improvement is expected in most cases. The purpose of this article is to comment on the basic concepts of signal design and the known features of those more common linear sweeps. Analyzed several special types of non-linear scanning, from the field test results, it seems to confirm the analysis of the conclusions. After simply considering another type of nonlinear signal - a special pseudorandom scan change - the author uses his own point of view to summarize the possible role that nonlinear signal design can play in the future of continuous vibration technology.