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  • 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, 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
  • Developer
    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....
  • 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
  • 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
  • Moderator
    Thats certainly cheap, nice find Sarel
  • Developer
    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!
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