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Project:LHS Graphs and Visualizations: Difference between revisions
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Project:LHS Graphs and Visualizations (view source)
Revision as of 13:18, 18 December 2010
, 18 December 2010→Space occupancy
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* This will probably get caught out by clusters of people: --[[81.105.17.61]] | * This will probably get caught out by clusters of people: --[[81.105.17.61]] | ||
** We only need an approximate count | ** We only need an approximate count | ||
** The doorway is narrow so it's unlikely that the steps of more than one individual will overlap | ** The doorway is narrow so it's unlikely that the steps of more than one individual will overlap. | ||
** Most of the time people won't arrive in clusters | ** Most of the time people won't arrive in clusters | ||
* Can we detect some other event such as the door opening after a prolonged lights-out period to force the count to zero? --[[81.105.17.61]] | * Can we detect some other event such as the door opening after a prolonged lights-out period to force the count to zero? --[[81.105.17.61]] | ||
** Yes, | ** Yes, using the door/lights data for reset would be good if we get large amounts of drift - but I don't plan to just yet | ||
** We could also use some kind of probabilistic model with the 'door-open' and 'bell' data | |||
These sensors appear to be in working order. They'd should be safe to use below child-head height. They were manufactured in 1996 and use a Class II laser rated at 3mW with a wavelength of 655-670nm ([[Media:Banner-q45bb6ll.pdf|datasheet]]). | These sensors appear to be in working order. They'd should be safe to use below child-head height. They were manufactured in 1996 and use a Class II laser rated at 3mW with a wavelength of 655-670nm ([[Media:Banner-q45bb6ll.pdf|datasheet]]). | ||
