See: http://www.opti-logic.com/industrial_rangefinders.htm Pricing from $495 for the 100 yard unit to $595 for the 400yard one.

7-9VDC conditioned required and Current draw @ full power (~ 1.8W)

Range (Minimum 4 Yards)
Resolution 0.2m
Dimensions: 32x78x84mm
Weight: < 8oz

Views: 2872


Developer
Comment by Ryan Beall on October 16, 2009 at 2:29pm
I've used these. Held altitude great! You just have to make sure you account for the bank and pitch angles. I was really impressed with this unit!

Moderator
Comment by Gary Mortimer on October 17, 2009 at 1:00am
Thats certainly cheap, nice find Sarel
Comment by LIN FENG on October 26, 2009 at 9:50pm
Dear Sarel

Hello, I am quite interested with this product.

We are working on an unmanned small-scale helicopter landing project, in which GPS is employed to get the position of the helicopter, but the GPS signal is not accurate enough for helicopter, especially, the altitude measurement. We want to use the laser range finder as the altimeter to control the altitude of the helicopter. I saw you and Ryan recommended the optic-logic laser range finder. May I know whether I can use this one in the outdoor environment under sunlight? In addition, the test field is covered by grass; does it affect the performance of the laser range finder?

Thank you for taking time and effort to answer my questions in your busy day!

Best regards,
Lin Feng
Comment by Morli_ on October 27, 2009 at 4:31am
this is interesting. Lin, have thought of using ultrasonic rangefinder/ sensors. since you want for landing project , I guess you need more accuracy , I see the resolution in this laser is 0.2 m and minimum rrange is 4 yards which is almost 4.8 mt , which does not make it good for landing( I may be wrong in my understanding of this device),

like these
or these

good luck

Developer
Comment by Mark Colwell on October 27, 2009 at 4:35am
These should work fine in daylight & on grass, but burnt areas may absorb the laser so no reading) I use a cheaper one to hunt with out to 400 meter, but not this one. the more reflective the target, rangefinder detects at longer range & will acquire target faster. Just wish my Bushnell had a port on it & data output....
Comment by LIN FENG on October 28, 2009 at 7:16am
Dear Morli and Mark

Thank you for your fast response and useful information.
In addition to the landing, in my project, I also want to use the laser range finder to correct the altitude estimation given by GPS during hovering condition. In the hovering condition, the helicopter will fly about 10 to 30 meters above the ground. For this range, I cannot find a suitable ultrasonic sensor. In fact, I am considering using both the laser range finder and sonar sensor to measure the altitude of the helicopter in different altitudes.

I also want to try the Sick dt50hi http://www.sick.no/no/produkter/innovation/dt50hi/no.html, but the local vender told me this one cannot work for the grass land. And he recommend me try a powerful one, but the weight will be increased. So I want to use the opti-logic laser range finder, but I just wandering whether opti-logic one can work in daylight and on grass. I have contacted the optic-logic, but they didn’t reply me.


Best regards,
Lin Feng

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