可变窗信号趋势算法及其应用于火灾自动探测

提出了计算窗可变的趋势算法，并将该算法应用于火灾自动探测．测试结果表明，它能及时检测出标准试验火源并极大地降低了误报警率．

A Signal Trend Algorithm with Variable Window and Its Application in Automatic Fire Detection

The window length for data observation is a very important parameter in the trend calculation of signals. A trend algorithm with automatic variation of window length is proposed. Normally, the window length is small and the detector can find the trend quickly. If the trend value exceeds a preset alarm threshold, the window length will be increased automatically so that no interference by other signals will occur. The detector with this algorithm can be used in the automatic fire detection. Test results with standard fire sources show that it is capable of finding the signal trends in time and the ratio of false alarm is very small.