Flow measurement in open channels by using an ultrasonic phased array sensor

Haide, Manuel; Schroer, Wolfgang

doi:10.1109/icsens.2013.6688141

Cited by 1 publication

(2 citation statements)

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“…propeller current meter [2], [3]) or the frequently used ultrasonic measuring systems (e.g. [4], [5]), which are always in contact with the measured medium. Radar systems in particular can be used as an important supplement for flood early warning systems, as they can quickly and reliably provide information at critical points.…”

Section: Introductionmentioning

confidence: 99%

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River Surface Analysis and Characterization Using FMCW Radar

Mutschler

Scharf

Rippl

et al. 2022

IEEE J. Sel. Top. Appl. Earth Observations Remote Sensing

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Today's warning systems for floods or droughts require sensor applications that provide a vast array of information. Current systems provide insight into either the water level or the river velocity. In order to obtain additional parameters for the characterisation of the flow behaviour in a non-contact manner, a frequency modulated continuous wave (FMCW) Radar with chirp sequence is used. Since these sensors provide range and velocity information but also enable gathering of additional parameters. The presented measurements in this contribution were performed at four different rivers with a commercially available radar sensor. The results of the classical post-processed two-dimensional fast Fourier transform are used as basis for an image-wise processing approach to obtain additional features for classifying the behaviour of the river surface. For this purpose, the frame-wise enveloping velocities are depicted in a time sequence. Due to processing the detected reflection patterns in relation to time, a characteristic pattern for river flow profiles can be extracted. By reducing the information using time averaging, characteristic features for different flows can be extracted from the spatial envelope velocity distribution. In particular, the resulting insights lead to characteristic features for single flow distributions. That enables novel monitoring systems with new possibilities to classify rivers using radar sensors.

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Section: Introductionmentioning

confidence: 99%

“…While the bathymetry is roughly given for artificially created channels, it has to be estimated for natural riverbeds. There are various approaches to this, which are discussed in [5] and [6].…”

Section: Introductionmentioning

confidence: 99%