I'm making a creating a small experiment which would use ultrasonic (HC-SR04) or IR (Sharp) distance sensors, however, I need to acquire errors for these sensors in order to get worthy results. Unfortunately, all datasheets that I have seen so far do not mention any sort of accuracy of these sensors at all; the best I've got is the resolution for the ultrasonic sensor, but I'm not too interested in that. Either way it seems weird that manufacturers do not release this information with these sensors.
Could anyone point me to a source or a similar sensor, which has the accuracy error specified by the manufacturer, or could someone explain why these sensors do not have the errors supplied?
weedpharma:
What type of IR sensor are you using (part number)?
Weedpharma
Sharp GP2Y0A21YK0F or GP2Y0A02.
AWOL:
Accuracy depends on all sorts of environmental issues, certainly for ultrasound.
(I've never used the Sharp devices)
Sure, as do most sensors, however, there isn't even a general estimate of the error presented, which I think it could be for normal conditions - hard objects, room temperature etc.
Your "normal" might not be my "normal".
Really, these things get used for all sorts of purposes and in all kinds of different environments.
You might find specs for readings taken normal to a hard, reflective surface in an anechoic chamber, but really such values are pretty meaningless.
Try looking at the Murata website.
AWOL:
Your "normal" might not be my "normal".
Really, these things get used for all sorts of purposes and in all kinds of different environments.
You might find specs for readings taken normal to a hard, reflective surface in an anechoic chamber, but really such values are pretty meaningless.
Try looking at the Murata website.
Sure, but giving a figure for those perfect conditions would at least give an impression of how accurate it is.
Did you mean this site here? I couldn't see anything pertaining to the distance sensing capabilities of these sensors, unfortunately.
Sure, but giving a figure for those perfect conditions would at least give an impression of how accurate it is
I disagree - I think it would raise unsustainable expectations.
I've seen these things pick up a broom-handle at 1 metre, and ignore a plaster wall at 20cm.
AWOL:
I disagree - I think it would raise unsustainable expectations.
I've seen these things pick up a broom-handle at 1 metre, and ignore a plaster wall at 20cm.
YMMV.
Too bad, wanted to use one of these for an experiment, but unfortunately it requires the error of the measuring devices.