Hi,
Could anyone advice me on how to build a Laser Distance Meter? Any suggestion on possible circuits and ideas is appreciated. Thank you.
I got the following specs in mind
Distance 1m – 30m , Temp -10c - 50c, All weather, Power Supply 12vdc
Hi,
Could anyone advice me on how to build a Laser Distance Meter? Any suggestion on possible circuits and ideas is appreciated. Thank you.
I got the following specs in mind
Distance 1m – 30m , Temp -10c - 50c, All weather, Power Supply 12vdc
Actually, the hardest part is getting the optics focused and getting enough return signal to measure. Commercial laser radars work by firing a series of short pules (~40 I think) and they require 32 or so to come back to the detector. Then it just finds the derivative after doing this enough to get velocity. However, it is not hard to build a simple histogrammer to find the mass center of the return pulse and a couple of repetitions will get you in fairly close.
Hi,
Thank you all for the replay. Any suggestions would help. Can you tell me what degree Ultrasonic work? (from the midpoint to the outside ) will it detect any other object then the target?
Hi,
Thank you all for the replay. Any suggestions would help. Can you tell me what degree Ultrasonic work? (from the midpoint to the outside ) will it detect any other object then the target?
It depends on the sensor in question. Some have quite broad areas, some are narrower. Search for ultrasonic rangefinders on sites such as https://www.sparkfun.com and read the datasheets to find out more specifics. If you build your own, you will need to find the datasheets for the transducers you are using. There are various ways you can affect the beam width (horns, etc) as well.
If you tell us exactly what problem you're trying to solve perhaps we can be more specific. Right now we're having to guess at what you want.
Yes. The sensor has no brains; anything in front of it which can reflect the beam sufficiently well will be detected. Same with any sensor: the sensor has no idea what *you* want it to see; it only knows what it's pointed at.
Hi,
I can’t use any wire from the wall to the other side, that is why I thought of Laser (no transmitter and receiver) Somehow you have to outsmart the criminals, so what will you do? Any thing would help.
Thank you
Piet
Hi,
I can’t use any wire from the wall to the other side, that is why I thought of Laser (no transmitter and receiver) Somehow you have to outsmart the criminals, so what will you do? Any thing would help.
Thank you
Piet