Need to measure deflection of a garage door under wind loading
Need to measure deflection of a garage door under wind loading
(OP)
Can anyone suggest a type of sensor that would be work for an application where we are testing garage doors between pressurized chambers? The delta in pressure on both sides will cause deflection (simulating wind loads) and we must measure that deflection. We want to take readings from at least 5 points on each door arranged in a '+' pattern, or 9 points in an equally spaced 3 row array. The doors tested will vary both in width (from 8' up to 20') and the heights will vary (both 7' and 10') as well so the sensor arrangement needs to be adjustable. Output signals from each would most likely be be sent to a PLC. These sensors do not have to be super accurate (at least 1/16" increments), so small and cheap would work best.
David Fowler
David Fowler





RE: Need to measure deflection of a garage door under wind loading
They come in all sorts of technologies: lvdt, capacitive, laser, etc.
TTFN
RE: Need to measure deflection of a garage door under wind loading
RE: Need to measure deflection of a garage door under wind loading
Does anyone have any experience with string potentiometers or string encoders? These seem like lightweight devices that can be readily moved anywhere within my chamber. Are they easily calibrated and reliable?
Davey
RE: Need to measure deflection of a garage door under wind loading
would be to use a dial indicator to accuratly measure the deflection and then ajust the scaling in the PLC to read the same as the dial.
RE: Need to measure deflection of a garage door under wind loading
Check out Linear Displacement Transducer Voltage (LDTV). these units provide a linear volyage with respect to the displacement of the actuator. Check out www.omega.com
RE: Need to measure deflection of a garage door under wind loading
http://www.spaceagecontrol.com/s054b.htm
RE: Need to measure deflection of a garage door under wind loading
Davey