About laser emitter and receiver

honggexjq said:

TX module is stationary and the target is some plant.

Click to expand...

Hi,
Reason for asking is to determine if the target is 'cooperative'
example: a retro prism or reflector or is it non cooperative.?

I'm not sure what you mean by 'plant', in English that could mean a piece of equipment??

ericgibbs said:

Hi,
Reason for asking is to determine if the target is 'cooperative'
example: a retro prism or reflector or is it non cooperative.?

I'm not sure what you mean by 'plant', in English that could mean a piece of equipment??

Click to expand...

haha,sorry for my poor english.By saying plant i mean those with leaves,like grass.So it's non cooperative.
maybe someday i should practice my english with a native like you

honggexjq said:

haha,sorry for my poor english.By saying plant i mean those with leaves,like grass.So it's non cooperative.
maybe someday i should practice my english with a native like you

Click to expand...

hi,
Your English is just fine.

A point to note is that when working with non cooperative targets, the strength of the echo signal can effect the apparent range.

This is partly due to the rise times of the receiver circuits.

If you examine the response curves for your receiver amplifiers you will see that for low signal levels the 'time' response is not linear.

This means that strong echo's appear to have a shorter overall response time which makes the measured distance shorter.

Do you follow.?