Table 2 Comparison of alarm method with the five types of presetting signals
From: Alarm method of communication intelligent manhole cover based on multiple event fusion
Input signal | Number of alarm | |
|---|---|---|
The existing method | The proposed method | |
Signal 1, Sa = 0, So = 0 | 0 | 0 |
Signal 2, Sa = 0, the duration lasts 1 s with So = 1 | 1 | 0 |
Signal 3, Sa = 0, the duration lasts 2 s with So = 1 | 1 | 0 |
Signal 4, Sa = 0, the duration lasts 3 s with So = 1 | 1 | 1 |
Signal 5, Sa = 0, So = 1 | 1 | 1 |