Novel approaches to helicopter obstacle warning

Seidel, Christian; Samuelis, C.; Wegner, Matthias; Münsterer, Thomas; Rumpf, Thomas; Schwartz, Ingo

doi:10.1117/12.664042

Cited by 11 publications

(10 citation statements)

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“…This also describes the challenge of this method. For example depicting a high-voltage powerline with a single straight line from one pylon to the other is a well-accepted and operationally proven concept for obstacle warning in flight [8] . The information available at sensor data processing level, in which the powerline consists of 15 discrete strings arranged in a certain manner, is reduced to a straight line at the highest position.…”

Section: Display Of Cuesmentioning

confidence: 99%

Display of real-time 3D sensor data in a DVE system

et al. 2016

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This paper describes the implementation of displaying real-time processed LiDAR 3D data in a DVE pilot assistance system. The goal is to display to the pilot a comprehensive image of the surrounding world without misleading or cluttering information. 3D data which can be attributed, i.e. classified, to terrain or predefined obstacle classes is depicted differently from data belonging to elevated objects which could not be classified. Display techniques may be different for head-down and head-up displays to avoid cluttering of the outside view in the latter case. While terrain is shown as shaded surfaces with grid structures or as grid structures alone, respectively, classified obstacles are typically displayed with obstacle symbols only. Data from objects elevated above ground are displayed as shaded 3D points in space. In addition the displayed 3D points are accumulated over a certain time frame allowing on the one hand side a cohesive structure being displayed and on the other hand displaying moving objects correctly. In addition color coding or texturing can be applied based on known terrain features like land use.

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Section: Display Of Cuesmentioning

confidence: 99%

Display of real-time 3D sensor data in a DVE system

et al. 2016

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“…Situational awareness and clearance from the ground (preventing CFIT) can be increased by several functionalities. The first one is already in operational use on the German and Finnish NH90 helicopters employing the so called safety-line 10 . This safety-line depicts the calculation of different evasion profiles within the ladar field-of-view in a simple line structure.…”

Section: Information Displayed On Hmdmentioning

confidence: 99%

“…The sensor was designed to support low-level flight and hover and performs a classification of each 3D measurement point. The resulting classes displayed in the obstacle warning mode are wires, poles and isolated trees, all classified according to their geometrical properties in 3D space 10 . SferiSense operates at the eye-safe wavelength of 1.54 µm and scans its field-of-view up to a distance of 1200 m with 3 Hz.…”

Section: D Sensor Technology / Key Performance In Dve Conditionsmentioning

confidence: 99%

Sensor-enhanced 3D conformal cueing for safe and reliable HC operation in DVE in all flight phases

et al. 2014

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Low level helicopter operations in Degraded Visual Environment (DVE) still are a major challenge and bear the risk of potentially fatal accidents. DVE generally encompasses all degradations to the visual perception of the pilot ranging from night conditions via rain and snowfall to fog and maybe even blinding sunlight or unstructured outside scenery. Each of these conditions reduce the pilots' ability to perceive visual cues in the outside world reducing his performance and finally increasing risk of mission failure and accidents, like for example Controlled Flight Into Terrain (CFIT). The basis for the presented solution is a fusion of processed and classified high resolution ladar data with database information having a potential to also include other sensor data like forward looking or 360° radar data. This paper reports on a pilot assistance system aiming at giving back the essential visual cues to the pilot by means of displaying 3D conformal cues and symbols in a head-tracked Helmet Mounted Display (HMD) and a combination with synthetic view on a head-down Multi-Function Display (MFD). Each flight phase and each flight envelope requires different symbology sets and different possibilities for the pilots to select specific support functions. Several functionalities have been implemented and tested in a simulator as well as in flight. The symbology ranges from obstacle warning symbology via terrain enhancements through grids or ridge lines to different waypoint symbols supporting navigation. While some adaptations can be automated it emerged as essential that symbology characteristics and completeness can be selected by the pilot to match the relevant flight envelope and outside visual conditions.

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“…Benefits of this mode include high scanning speed, however, the performances of light transmittance and field of view cannot be satisfied. The second mode is called "mechanical scanning" which includes raster scanning, galvanometer scanning, fiber scanning [4] and MEMS mirror scanning [5] . However, both of them are still in the stage of experiment and not mature enough to apply to imaging laser radar.…”

Section: Introductionmentioning

confidence: 99%

A novel optical scanner for laser radar

Yao

Peng

Gao

2013

International Symposium on Photoelectronic Detection and Imaging 2013: Laser Sensing and Imaging and Applications

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Laser radar are ideally suitable for recognizing objects, detection, target tracking or obstacle avoidance, because of the high angular and range resolution. In recent years, scannerless ladar has developed rapidly. In contrast with traditional scanner ladar, scannerless ladar has distinct characteristics such as small, compact, high frame rate, wide field of view and high reliability. However, the scannerless ladar is still in the stage of laboratory and the performance cannot meet the demands of practical applications. Hence, traditional scanner laser radar is still mainly applied. In scanner ladar system, optical scanner is the key component which can deflect the direction of laser beam to the target. We investigated a novel scanner based on the characteristic of fiber's light-conductive. The fiber bundles are arranged in a special structure which connected to a motor.When motor working properly, the laser passes through the fibers on incident plane and the location of laser spot on output plane will move along with a straight line in a constant speed. The direction of light will be deflected by taking advantage of transmitting optics, then the linear sweeping of the target can be achieved. A laser radar scheme with high speed and large field of view can be realized. Some researches on scanner are simply introduced on section1. The structure of the optical scanner will be described and the practical applications of the scanner in transmitting and receiving optical paths are discussed in section2. Some characteristic of scanner is calculated in section3. In section4, we report the simulation and experiment of our prototype.

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Novel approaches to helicopter obstacle warning

Cited by 11 publications

References 0 publications

Display of real-time 3D sensor data in a DVE system

Display of real-time 3D sensor data in a DVE system

Sensor-enhanced 3D conformal cueing for safe and reliable HC operation in DVE in all flight phases

A novel optical scanner for laser radar

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