| ??? 02/25/10 15:43 Read: times |
#173561 - Perimeter intrusion detection |
I need to build a perimeter intrusion detection. I was thinking of using 2 parellel bars, with IR LEDs on one and detectors on the other, resulting in multiple parallel beams of IR.
The scheme is to a. Have a normal cone shaped holder as reflector behind each LED so that the beam would travel in a decent straight line. Laser diodes are too expensive and loading, hence they should be avoided as light source even though the beam would be less dispersed. b. Multiplex the LEDs and the detectors, so that only one LED is on at a time, and the corresponding detector is checked. c. Multiple signatures are taken after a strike to determine if the intruder is a human. 1.Kindly comment on a and b. Kindly guide as to what would be the best method for human-filtering the result. 2.What would be the best way to stack up the scheme to increase the length and height of the fence? By multiplexing each segment? |
| Topic | Author | Date |
| Perimeter intrusion detection | 01/01/70 00:00 | |
| comments | 01/01/70 00:00 | |
| human-filtering the result | 01/01/70 00:00 | |
I wonder ... | 01/01/70 00:00 | |
| What's the size (Length, width, height) of the "fence"? | 01/01/70 00:00 | |
| Muxing and filtering | 01/01/70 00:00 | |
| Machine Vision? | 01/01/70 00:00 | |
| Machine vision. | 01/01/70 00:00 | |
| The problem with machine vision | 01/01/70 00:00 | |
| Thanks Jez, but it would be expensive! | 01/01/70 00:00 | |
| Why not start by answering the questions asked? | 01/01/70 00:00 | |
| Light Curtain | 01/01/70 00:00 | |
| Answers and light curtain | 01/01/70 00:00 | |
| human filtering | 01/01/70 00:00 |