@Roberto Santos: There are typically two types of solutions for the LIDAR-Lite and cases: 1) create a case sealed against water/rain and have it pressed against the emitter/receiver as perpendicular as possible. The material used shall be IR transparent. 2) create a case sealed against water/rain with holes for the emitter/receiver with gasket around them for sealing it nicely.
Alternatively, you could simply purchase the LLV3HP [RB-Pli-17] which is resistant to water (IPX7). This is what the manufacturer says is can do: suitable for “splashes, rain or snow, showering”. It is unsuitable for “swimming, diving into water, snorkeling or scuba diving, high-speed watersports”.
Thank you for all the help!!!
sir i’m using this lidar lite v3 sensor to detect the slope inclination and declination on road. i have one doubt , how do we come to know that laser beam light is falling on the road and is correctly reflected back to sensor.
sometimes the beam may won’t reflect back to sensor.
@Kavitha: Please note the LIDAR-Lite is meant for distance measurement in the optimal situation where the sensor is facing a reflective flat surface perpendicular to the sensor’s beam. Any other uses (such as slope incline detection) will most likely not be optimal and produce unreliable results. If the target surface is reflective and angled away from the sensor, it is possible that little or none of the signal comes back to the sensor, therefore providing erroneous results. For technical support with your use, we recommend that you make a new topic here. To help the community understand your situation, we recommend that you add as many details as possible about your setup, including attaching pictures or sketches of the project.
just want to ask if humidity affects the computation of distance using lidar or light just like the sound sensors. thanks
@Domingo Ramos: “Humidity” might affect the computation of the distance, in the sense that heavy rain will refract, absorb, etc. the signal as it travels to a target and back. Otherwise, regular humidity in the air should be fine as long as it is not enough to cause electrical issues to the sensor itself (not sealed).
I would be very thankful if you can answer my question, Can I use this Lidar for measure height? for example, can I use it to measure the height of the tree? Thank you
Would the measurement of water in a vertical pipe be refelected with no pipe wall interference inside the pipe ?
@swefe: Short answer: maybe.
Long answer: It depends on multiple factors. First, the signal may or may not reflect on the water depending on angle and composition. You will need to test this. As for the pipe size, it depends on the distance. For short distance / larger pipes, that may be OK. The divergence is 8 mrad, so @ 100 cm distance the spot would be roughly 0.8 cm of radius (or ~1.6 cm wide/diameter). The size of the spot is linearly proportional to the distance.
@Elnaz: Maybe. In a general sense, the LIDAR-Lite is a distance measurement sensor. Therefore, you can use it to measure the distance between two points: the sensor itself and the target.
A simple (but impractical) way to get the height of a tree would be to take a measurement from the top of the tree towards the ground. Of course, that is most likely not feasible in most cases.
Instead, you can use trigonometry to help you. Choose a far enough away point from the tree’s base and measure the distance from the ground to the tip of the tree. Take note of the angle of measurement relative to the ground, too. Then, from the same point, measure the distance to the tree trunk horizontally. Some basic trigonometry should help you figure out the height (missing length). Here’s a link to a useful online trigonometry utility calculator.
I would like to know can I measure the hight of the tree with this LIDAR? which angle can I take with this device?
@Elnaz: As mentioned in our previous response, other than measuring from the tree top, you can use some trigonometry to measure it from the ground, too.
Here is a good article about it: https://www.monumentaltrees.com/en/content/measuringheight/
I’m looking for a device that will allow me to establish the position of moving objects (2 dancers) on a 30X30 stage. Would this be an appropriate solution?
@jfhallst: This example project would most likely not be suitable for moving objects (such as dancers). This is meant for robot collision detection at low speed, such as detecting walls and other large obstacles while not moving or moving very slowly. This is mostly due to the setup being quite slow and having only one beam.
You would probably be better off using one of our other LIDAR product, such as our rotating or multi-beam ones.
Alternatively, you could try using a stereo-camera system to detect the dances, such as this one.
Is it possible to use the Arduino IDE to write sketches that capture data from the rotating LIDAR? (As I understand it, the example code for the inexpensive one you sell is all in C and I haven’t been able to find any example sketches that show how to do it using the Arduino language.) I’m a fairly novice programmer.
@jfhallst: Actually, the example for this blog article is Arduino code. It was done using a Lynxmotion BotBoarduino, which is an Arduino-compatible board with better support for projects using servomotors and dual power supplies (one for electronics, one for motors).
It should be noted that Arduino sketches are basically C/C++ with added pre-processing (extra features for Arduino).
Could you link to specific products? That would help us provide more details, maybe even actual example code.
Please note that what you are trying to create (track two moving objects in a large space) is typically not a trivial project and therefore maybe not the best project to start with. That being said, you can certainly learn much from it but it will require a lot of effort (and most likely many hours of frustration with things that don’t work quite as you want them too 
)
I’m wondering if this device can be used to measure the speed/distance of an athlete travelling down a runway (long jump or pole vault) in order to create a plot of speed at each measured distance along the run (for each the runs are less than 40 meters). The most important thing is the speed at takeoff, but having an acceleration curve would provide interesting data concerning the quality of the run.
@DLee
The sensor is designed to measure distances to an object, typically the floor (UAV) or walls/large obstacles (robots in general). That being said, you can of course use it for other purposes.
You results may vary depending on how well the signal bounces back to the sensor from the athlete. The best here would be to try it out and see how it goes. Maybe try and aim at the back of the athletes where you could have a large reflective surface to target?
Good luck!
Thanks…looks like this is in the infrared spectrum. Can the point be imaged at 30-40 meters on a target with an infrared camera or other device for aiming purposes?
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Indeed, it is using a 905 nm wavelength as seen in the product’s specifications.
Well, at 30-40 meters you won’t have a point at all. Also in the specifications it is specified that the beam divergence is 8 mili-radian (or ~0.458366°). This translates to a spot size of at least 24 cm @ 30 m and at least 32 cm @ 40 m.
The signal itself it not simply a on/off but hundreds of IR pulses with different signatures that are correlated by the device to get a proper measurement, so it might not be as easy to see as expected.
That being said it may still be possible to see it using a camera or other image capturing device that is sensitive to IR. I’ll see with the manufacturer what they think about this and post here again once I have more information.
I hope the info above helps you understand a bit better the sensor and how it functions.
Sincerely,