I am using three MaxBotix ultrasonic range finders: http://www.maxbotix.com/documents/MB1010_Datasheet.pdf
using the Sequentially Read Each MaxSonar wiring scheme: http://www.maxbotix.com/articles/031.htm
I have played with angles and surfaces they are pointed at, a timer around the calling function so there is a time lag between each of the analogRead functions and I am still getting a very large range in data collected from the lead sensor in the chain. This latest run I was getting from 16 inches to 57 inches (variation of 41 inches is not going to work for my application), and the second sensor has a 10 inch variation and the final sensor only has a variation of 4 inches.
Am I doing the wrong kind of scheme? Would the Continuous looping scheme give me more accurate readings? Are there any other suggestions?
Should I try using a filter to and try to get an average before making decisions about actions? That idea comes up because the high values seem to be accurate and the pattern might work if I take 3 readings and if one of the 3 is higher than my threshold then continue normally or if all is less than stop the aircraft.
Thanks for any help, Postholes