It makes the signal processing method in fire detection to be downright improved and improves the ability to detect fire in early stage.

这使得在火灾探测中的信号处理在方法上做了彻底改进，提高了早期发现火灾的能力。

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Then proposes a method to detect the arrival time of instantaneous signal and the frequency composition under strong noise background.

提出了在强噪声背景下检测瞬时信号的到达时间和频率成分的方法。

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The principles of using signal injection method to detect single-phase earth fault of distribution network at present are compared and analyzed.

对目前配网采用信号注入法检测单相接地故障的原理进行比较分析。

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