Project:LHS Graphs and Visualizations: Difference between revisions
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Project:LHS Graphs and Visualizations (view source)
Revision as of 10:41, 19 January 2011
, 19 January 2011→Space occupancy
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* 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, 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 | ** 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 | ||
** This might fail if people spend the night there. AIUI this happens rarely enough that we may not care about the inaccuracy. | |||
** We could also use some kind of probabilistic model with the 'door-open' and 'bell' data | ** 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]]). The model number is: Q45BB6LL | 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]]). The model number is: Q45BB6LL | ||
