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3 votes

What are some low cost alternatives for lidar?

This representative sample of what's out there may give you some idea of what's out there at various price points: Unfortunately, you're talking several thousand dollars for an outdoor unit with 10's ...
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2 votes

What are some low cost alternatives for lidar?

Your cheapest option will probably be to use a ultrasonic sensor on a stepper, by advancing the server one step and reading the distance. The only downside to this will be the resolution you can get, ...
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2 votes

What are some low cost alternatives for lidar?

I don't have enough reputation to comment, but I'll add my 2cents in an answer. Basically you're limited to lidar mapping if you want any decent fidelity. Stereoscopic imaging via OpenCV in one ...
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2 votes

Tracking Landspeed Underwater

Another sensor that you should investigate is ultra-short baseline (USBL). I have used the MicronNav with success in the past. You mentioned accelerometers, but what I think you really meant is an ...
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2 votes

What's the difference between a sonar and ultrasonic sensor?

Sonar, as used in robotics means having an ultrasonic emitter and and ultrasonic receiver. There are also some sonar with a single emitter/receiver. However, they all use ultrasonic sound ways in ...
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2 votes
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Quadcopter PID Tuning for Altitude Hold/Position Hold along Z axis

Currently I am performing my research on that, and in my case I decided to tune all the PIDs. Angles of the quadrotor tend to zero, while altitude controller tend to the objective height. That's ...
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2 votes

How can I manipulate real-time sonar data from my Arducopter in Arduino?

Setting up the software to extract new custom sensor data via MAVLink seems to be harder than it should be. Step one is to make the quadcopter send off the data. First, you need to define a new ...
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1 vote

Convert sonar scans to Lidar scan file

Assuming you mean a LaserScan ROS message. It's possible to use the geometry of your robot and laser positions to create one ray per sensor in the laser scan. This is basically going to be a manual ...
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1 vote

What's the difference between a sonar and ultrasonic sensor?

Ultrasonic means above audible range, Sonar may be within the audible range In my opinion the ultrasonic being more precise also may come with higher price.
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1 vote

What's the difference between a sonar and ultrasonic sensor?

The main difference is, SONAR (originally an acronym for SOund Navigation And Ranging) is used underwater and uses low frequency sounds (100-500Hz) as well as high frequency sounds (ultrasound, etc). ...
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1 vote
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Dynamically detect changing obstacles

Having an overhead camera (like a single low cost webcam if needed). Ultrasonics is meant to be directional while cameras are not meant to be. The downward facing camera placed at a height and ...
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1 vote

Tracking Landspeed Underwater

So this is really a hard task. Estimating the position of a AUV is still a large challenge even in research. There are sensors like as DVL (Doppler Velocity Log) available that can estimate the speed ...
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1 vote

SLAM without landmarks using sonar

I asked this question before in here when I had no idea what SLAM problem actually is. I realized later this question was a sign indicates that I have no idea about the problem. The word SLAM is an ...
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1 vote

What are some low cost alternatives for lidar?

I think the time-of-flight cameras would suffice for your application and are cheaper than laser scanners (which are much more precise).
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1 vote

What are some low cost alternatives for lidar?

http://hackaday.com/2014/01/23/lidar-with-leds-for-under-100/ This could be a good alternative to lidar. I dont know if it is commercially available.
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What are some low cost alternatives for lidar?

Depending on what your actual use case is, you might be able to use Stereo cameras: Needs more processing power on board, usually smaller field of view Kinect There are some kickstarter projects ...
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Image retrieval through a multibeam imaging sonar

We are using the P900 multibeam sonar. So far our interface hasn't any problem. But we requested a new version of the library from teledyne which works now in our case. ...
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