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The Basement
OT: Motion Detection
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<blockquote data-quote="Rob Timmerman" data-source="post: 40052" data-attributes="member: 172"><p>Re: OT: Motion Detection</p><p></p><p>There are 2 basic types of motion sensors - Passive IR (PIR) and ultrasonic. PIR sensors work by detecting warm bodies (so no use against zombies or vehicles), and are susceptible to things like sunlight and animals. They tend to be only effective over a short range. Ultrasonic sensors are similar to SONAR in operation, and work by pinging the environment. They can be effective against vehicles, but I'm not sure how effective they are outdoors.</p><p></p><p>In your application, a beam-break detector may work well (they are common at some retail outlets - Electron Hut comes to mind), although there is the reflector issue and the potential for things like snow and elaves triggering false positives.</p><p></p><p>Any reason you don't want to go the camera route?</p></blockquote><p></p>
[QUOTE="Rob Timmerman, post: 40052, member: 172"] Re: OT: Motion Detection There are 2 basic types of motion sensors - Passive IR (PIR) and ultrasonic. PIR sensors work by detecting warm bodies (so no use against zombies or vehicles), and are susceptible to things like sunlight and animals. They tend to be only effective over a short range. Ultrasonic sensors are similar to SONAR in operation, and work by pinging the environment. They can be effective against vehicles, but I'm not sure how effective they are outdoors. In your application, a beam-break detector may work well (they are common at some retail outlets - Electron Hut comes to mind), although there is the reflector issue and the potential for things like snow and elaves triggering false positives. Any reason you don't want to go the camera route? [/QUOTE]
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