Can you provide more information about the sensing task?
Your question is too general for a meaningful answer.
Can you provide more information about the sensing task?
Your question is too general for a meaningful answer.
They all seem to have a range more than 2 meters, and the range is not constant (change as room temperature change). I don't have much experience with PIR, is that a way to fix these limitation?
I find that they draw too much power (for my application)The "max 2 meters range" is your problem with PIR.
Ultrasonic ranging sensors- at least you can discriminate objects too far away.
I sometimes just use black tape over parts of the sensor to decrease sensitivity and to narrow detection direction/range along with proper placement. With good sensors normal room temperature variations should be a non issue.They all seem to have a range more than 2 meters, and the range is not constant (change as room temperature change). I don't have much experience with PIR, is that a way to fix these limitation?
Good information there! Many basic practical details.Look here for a possibility:
https://acroname.com/articles/sharp-infrared-ranger-comparison
I have tested this on two Panasonic PIR, I can't get constant result. In a cold day, both sensor have smaller range. But bigger range in warmer days. Also it seems the hotter the object (person), the longer the range. Anything I am missing?I sometimes just use black tape over parts of the sensor to decrease sensitivity and to narrow detection direction/range along with proper placement. With good sensors normal room temperature variations should be a non issue.
by Aaron Carman
by Aaron Carman
by Aaron Carman
by Aaron Carman