Lux measuring from the sealing
Lux measuring from the sealing
(OP)
Hey everyone I have to build a device witch I can install to the sealing and that tells me how bright it is on the floor. I thought of a normal Photodiode witch I shielded from the sides and pointed towards the floor but the problem is that depending to the surface I point my sensor on I get different reflections. Has anyone an idea how to avoid that problem? Or is there an existing Sensor?
Thanks a lot
Greets Baggal
Thanks a lot
Greets Baggal





RE: Lux measuring from the sealing
RE: Lux measuring from the sealing
Aim your sensor up, or calibrate for the semi-reflective surface of the floor.
RE: Lux measuring from the sealing
http://www.amazon.com/Sekonic-Corporation-401-479-...
You should not point to the flooring unless the sensor is well calibrated for that. The reflectivity of the flooring will vary depending on material and wear/cleaniness
TTFN
FAQ731-376: Eng-Tips.com Forum Policies
RE: Lux measuring from the sealing
Whats the reason for the test?
RE: Lux measuring from the sealing
I have to develop an illuminate System for an open-plan office. And it should be a bit intelligent so only turn on the light if someone is around and it's not light enough. Now the plan is, that we only have to install new lamps, so with all the electronics included means no extra sensor-farms… that's why I have to measure how light it is from the ceiling.
RE: Lux measuring from the sealing
TTFN
FAQ731-376: Eng-Tips.com Forum Policies
RE: Lux measuring from the sealing
RE: Lux measuring from the sealing
TTFN
FAQ731-376: Eng-Tips.com Forum Policies
RE: Lux measuring from the sealing
Get a wide angle sensor, install it on a ceiling or wall, aim it down, and adjust to taste. It's not going to be that accurate that natural variations are going to be the cause of complaints. The entire concept might be...
You'll need hysteresis. And probably timers. Perhaps outdoor sensors. And over-rides.
RE: Lux measuring from the sealing
RE: Lux measuring from the sealing
RE: Lux measuring from the sealing
RE: Lux measuring from the sealing
TTFN
FAQ731-376: Eng-Tips.com Forum Policies