[Butia-devel-list] Proyecto de LIDAR Open Source y Open Hardware

[Daniel Larrosa]

Quizas este proyecto de LIDAR Open Source y Open Hardware resulte
interesante para quienes quieran incorporarlo/adaptarlo a
proyectos/investigaciones en electronica y/o robotica:

https://hackaday.com/2019/02/06/open-source-lidar-lets-you-get-down-to-the-nitty-gritty/
   (articulo descriptivo)

https://hackaday.io/project/163501-open-source-lidar-unruly     (el
proyecto en si)

Un extracto:

Open hardware, open software and a detailed explanation of how LiDAR works
right down at the component level. These are the objectives of this
ambitious project.

Primary objectives:
1. Design a simple LiDAR module that is relatively easy to understand.
2. Use as many COTS (commercial-off-the-shelf) electronic components as
possible.
3. The software must be easy to modify without a complicated IDE.
4. Mechanical parts must be 3D printable.
5. Optical components must be available at a reasonable price.

The Unruly is not just a crazy hack but is also a serious educational tool
with lots of capabilities added to allow for experimentation. Here's the
Unruly feature list in no particular order:

The Unruly is a time-of-flight LiDAR that uses a pulsed laser diode (PLD)
to generate a flash of light, an avalanche photodiode (APD) to detect the
return signals and a high speed timer (TDC) to measure the return time.
The total circuit board area is one square inch.
The measuring range can be adjusted to over 100m on natural surfaces and
250m on reflective surfaces, outdoors in bright sunlight.
The resolution can be configured down to 1 cm.
The measuring rate is up to 1000 readings per second or maybe more ;).
The laser power, pulse width and eye safety ratings are all under software
control and can be set to Class 1, Class 1M or Class 3R to suit the
application.
The APD detector can be adjusted under software control to operate at
optimum sensitivity taking into account temperature and ambient conditions.
The amplifier gain can be adjusted under software control to achieve the
best SNR (signal-to-noise ratio).
The detection threshold can be adjusted under software control to set the
false return error rate.
Up to five different target returns can be measured on each laser shot.
The total power consumption is less than 0.5 W.
USB, serial and I2C communications are available at the same time.
Two servo driver ports are available to control scanning (
https://youtu.be/IirAJO5H0yI).
A digital I/O for alarms or other purposes is available.
Mechanical parts are 3D printable.
EMC emissions are low enough for use with RTK and GPS systems without
interference.
EMC immunity is high enough to allow for use with BLE, WiFi, LoRa or other
radios in close proximity (still to be tested).

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Saludos,
     Daniel.
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