Drone sensors in comparison
Whether for inspection, rescue operations or surveying - drones are indispensable tools in many industries today. Sensors that deliver more than just visual images are particularly in demand. Two technologies are particularly in focus: thermal imaging cameras (e.g. from FLIR) and LiDAR sensors.
But what are the differences between these systems - and when is which solution the better choice?
What is a thermal imaging camera?
Thermal imaging cameras capture infrared radiation and make temperature differences visible. FLIR (Forward Looking Infrared) is one of the best-known manufacturers of such cameras. They generate thermal images that can detect people, animals, leaks or hotspots in systems - even in complete darkness.
Typical areas of application:
- People search(Search & Rescue)
- Fire detection during firefighting operations
- Photovoltaic inspections
- Agriculture (e.g. searching for wild animals before mowing)
- Building inspections (e.g. thermal insulation, leaks)
Typical for thermal imaging cameras: razor-sharp temperature images - even at night or in poor visibility.
What is a LiDAR sensor?
LiDAR(Light Detection and Ranging) uses laser beams to measure precise distances and create a 3D model of the surroundings. The technology is particularly suitable for surveying, mapping and digital twins.
Typical areas of application:
- Surveying and mapping (e.g. in forestry or construction)
- Route flights
- Stocktaking in agriculture
- Digital twins and BIM projects
- Infrastructure inspections
Typical for LiDAR: Extremely detailed point clouds - even with dense vegetation or poor visibility.
Note: The latest drone models use LiDAR technology for obstacle detection in flight.
Thermal imaging cameras versus LiDAR
Below is an overview of the most important differences between the two sensors:
Tip: For many applications, the combined operation - for inspection drones, for example - i.e. drones that can capture both thermal and LiDAR data.
Our recommendation: DJI solutions with thermal imaging camera and/or LiDAR
DJI Matrice 4TD
Compact drone with integrated thermal imaging camera - ideal for BOS, energy and agriculture.
DJI Matrice 400 + Zenmuse H30T
Robust all-rounder for industrial inspections with thermal imaging camera and zoom optics.
This series also uses a permanently installed LiDAR module for obstacle detection and automatic avoidance. Such a module is also available for the Matrice 4D series.
Here you can find more drone solutions from DJI.
Conclusion: See temperature or measure structures?
The choice depends on the application scenario:
- A thermal imaging camera is unbeatable for temperature-based analyses.
- There is no way around LiDAR for precise 3D measurements.
Droniq will be happy to advise you on the right solution for your requirements.
