77 GHz radar-based altimeter for unmanned aerial vehicles

Hügler, Philipp; Geiger, Martin Josef; Waldschmidt, Christian

doi:10.1109/rws.2018.8304965

Cited by 15 publications

(13 citation statements)

References 4 publications

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“…This could be used to prevent harvesters from being damaged by buried metal objects. With radar sensors one cannot only detect the altitude above ground level (AGL) but also obstacles such as vegetation [11]. Radar can directly measure the velocity of obstacles, it has a large detectable maximum range, and is very robust regarding weather influences.…”

Section: Application Areasmentioning

confidence: 99%

“…Sensing the altitude AGL with a 24 GHz FMCW radar and fusing it with accelerometer data is validated indoors using a motion capture system consisting of 24 cameras [20]. An in-depths analysis of a 77 GHz radar-based altimeter is given in [11]. With In order to reduce hardware complexity and therefore achieve lower costs, a pulse correlation radar can be used for altitude AGL estimation.…”

Section: Uavs and Radar: Remote Sensing And Safety Improvementmentioning

confidence: 99%

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Radar Taking Off: New Capabilities for UAVs

et al. 2018

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Modern consumer and industrial unmanned aerial vehicles (UAVs) are easy to use flying sensor platforms. They offer stable flight, good maneuverability, hovering, and even waypoint flights in autopilot mode. For stabilization and localization sensors such as internal measurement units (IMUs) including gyroscope and accelerometer, barometric sensor, and global navigation satellite system (GNSS) are used. To sense the direct environment of the UAV, for instance for collision avoidance or fully automated flights, additional sensors are needed. State-of-the-art combinations of infrared sensors, ultrasonic sensors as well as vision based sensors (monocular and/or stereo vision) capture the close vicinity. Using radar sensors is advantageous, as they are able to directly sense range and velocity and are not prone to lighting conditions and contrast. With the help of a multi-channel radar, the angular information can also be extracted. UAVs can lift a considerable payload with respect to their size. All these characteristics combined with radar sensors make them a promising tool for a large variety of applications.

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Section: Application Areasmentioning

confidence: 99%

Section: Uavs and Radar: Remote Sensing And Safety Improvementmentioning

confidence: 99%

Radar Taking Off: New Capabilities for UAVs

et al. 2018

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“…A survey on radars mounted on multirotor UAVs is provided in [11] along with an experimental result of multiple-input multiple-output (MIMO) imaging radar mounted on a hexacopter. UAV-borne radars were used as an altimeter in [12], [13] to aid drone maneuverability and provide increased flight safety. A 26 GHz radar was also used as an altimeter in [14] to generate a terrain map of the experiment scene.…”

Section: Introductionmentioning

confidence: 99%

Multichannel W-Band SAR System on a Multirotor UAV Platform With Real-Time Data Transmission Capabilities

et al. 2020

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In recent years, the demand for small-scale remote sensing, which is used in disaster monitoring, agriculture, and ground subsidence has increased. A multichannel synthetic aperture radar (SAR) system can provide image and topographic information of the illuminated scene, regardless of adverse weather conditions. As a cost-effective solution to radar imaging, a multichannel W-band SAR system mounted on a multirotor unmanned aerial vehicle (UAV) is presented. The radar module was designed to operate at W-band to achieve small size and weight allowing the module to be mounted on multirotor UAVs with small payload. A detailed description of the design and measurement of the system is provided in this paper. The radar imaging capability of the developed system was verified by performing outdoor experiments using isolated buildings as targets. The multichannel functionality of the system was verified by measuring height of a point target placed above the ground. The measurements and experiments verified the feasibility of a multichannel radar mounted on a multirotor UAV for imaging and topographic applications.

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“…Many of these challenges can be overcome by using radar sensors. In [2] and [3] frequency modulated continuous wave (FMCW) radar altimeters are presented. However, FMCW radars are complex sensors.…”

Section: Introductionmentioning

confidence: 99%