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What is LiDAR technology?

The problem of autonomous robotics, whether for cars, drones, and all objects intended to move, is the perception of their environment. The robots are therefore equipped with sensors as radars or LiDAR. At Drotek, our expertise goes through consulting, feasibility study, design, development and industrialization of your project. We master and internalize all stages of our development process in our premises in France. Our sensor integration expertise includes IMU (Gyro, Accelerometer, Compass), Industrial Sensor, Lidar, Thermal & Stereo camera, Sonar, Radar… 

 

What is LiDAR technology?

 

LiDAR refers to a technique of distance measurement that relies on the analysis of the properties of a light beam – a laser in general – returned to its transmitter. So the Lidar works a bit like the Radar. But where the Radar operates microwaves, the Lidar plays with waves of the infrared, visible or ultraviolet. And the distance from the Lidar to an object is measured as a function of the delay between the emission of a laser pulse and the reception of the reflected pulse. The measurement of the frequency offset between the transmitted wave and the reflected wave makes it possible to obtain an evaluation of the speed of movement of an object. It is also possible to measure other parameters from light / matter interactions on the beam path.

To sum up, LiDAR principle is quite easy to understand:
1. Emit a laser pulse on a surface
2. Catch the laser reflected at it pulse source with sensors
3. Measure the time traveled by the laser
4. Calculate the distance of the source with the formula “distance = (speed of light x elapsed time) / 2

This process is repeated a million times by LiDAR instruments and ends up producing a complex map of the studied area: a 3D point cloud.

The main benefits of LiDAR

Resolution and precision
The technology instantly generates a huge amount of measurements and can be accurate to within one centimeter.

3D cartography
LiDAR data is easy to convert into 3D maps for interpreting the environment.

Low light performance
It is not affected by variations in ambient light and works well in all low light conditions.

Speed
Its data is a direct measure of distance. They do not need to be deciphered or interpreted, they allow a fast operation and reduce the necessary treatment.

What are the LiDAR applications?

 

The applications are numerous. We can mention the 3D reconstruction of environments or the detection of archaeological sites buried under the vegetation, speed controls for road safety or real-time telemetry for guiding vehicles such as the autonomous car.

Robotics

Most new indoor and outdoor mobile robots have integrated a LiDAR to map their environment and improve their navigation. Delivery, Security, Industrial Automation are some applications using a mobile robot with a LiDAR.

UAVs

UAVs are used for monitoring farmland or warehouses, mapping inaccessible locations, delivering products or liquids, or filming sports competitions. In order to map and monitor the environment, these drones embark this technology.

Drotek partners with various LIDARs providers to offer you different solutions depending on your issues and your projects. Our special relationship with these suppliers will allow you to enjoy exclusive offers. Do not hesitate to contact us directly to discuss your project and the LIDAR solutions we offer.

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