Table 1 Specification of PIR sensors
From: Design and implementation of a distributed fall detection system based on wireless sensor networks
PIR index | Mask | Sector angle ϕ | Cone angle β |
|---|---|---|---|
1 | Type I | -45°to 90° | 45° |
2 | Type I | 45°-180° | 45° |
3 | Type I | 135°-270° | 45° |
4 | Type I | -135°to 0° | 45° |
5 | Type II | 0°-360° | 10° |
6 | Type II | 0°-360° | 25° |
7 | Type II | 0°-360° | 45° |