Automotive Radar Application for Structural Health Monitoring

Gambi, Ennio; Ciattaglia, Gianluca; Santis, Adelmo De

doi:10.2495/safe190081

Cited by 4 publications

(3 citation statements)

References 6 publications

(7 reference statements)

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“…They were able to detect deformations in the sub-mm to mm range but had no independent reference measurements for comparison. Gambi et al [24] evaluated an automotive radar with 2 TXA and 4 RXA and measured the displacements of a traffic bridge concluding that W-band radar instruments would be able to measure vibrations.…”

Section: Mimo-sar In Structural Health Monitoringmentioning

confidence: 99%

MIMO-SAR Interferometric Measurements for Structural Monitoring: Accuracy and Limitations

2021

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Terrestrial Radar Interferometry (TRI) is a measurement technique capable of measuring displacements with high temporal resolution at high accuracy. Current implementations of TRI use large and/or movable antennas for generating two-dimensional displacement maps. Multiple Input Multiple Output Synthetic Aperture Radar (MIMO-SAR) systems are an emerging alternative. As they have no moving parts, they are more easily deployable and cost-effective. These features suggest the potential usage of MIMO-SAR interferometry for structural health monitoring (SHM) supplementing classical geodetic and mechanical measurement systems. The effects impacting the performance of MIMO-SAR systems are, however, not yet sufficiently well understood for practical applications. In this paper, we present an experimental investigation of a MIMO-SAR system originally devised for automotive sensing, and assess its capabilities for deformation monitoring. The acquisitions generated for these investigations feature a 180∘ Field-of-View (FOV), distances of up to 60 m and a temporal sampling rate of up to 400 Hz. Experiments include static and dynamic setups carried out in a lab-environment and under more challenging meteorological conditions featuring sunshine, fog, and cloud-cover. The experiments highlight the capabilities and limitations of the radar, while allowing quantification of the measurement uncertainties, whose sources and impacts we discuss. We demonstrate that, under sufficiently stable meteorological conditions with humidity variations smaller than 1%, displacements as low as 25m can be detected reliably. Detecting displacements occurring over longer time frames is limited by the uncertainty induced by changes in the refractive index.

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Section: Mimo-sar In Structural Health Monitoringmentioning

confidence: 99%

MIMO-SAR Interferometric Measurements for Structural Monitoring: Accuracy and Limitations

2021

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“…The same principle can be also applied to monitor the structural health of buildings or bridges [30][31][32]. Other industrial applications include the detection of water levels inside a tank [33], or the estimation of tyre wear [34].…”

Section: Related Workmentioning

confidence: 99%

Performance Evaluation of Vibrational Measurements through mmWave Automotive Radars

et al. 2020

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Thanks to the availability of a significant amount of inexpensive commercial Frequency Modulated Continuous Wave Radar sensors, designed primarily for the automotive domain, it is interesting to understand if they can be used in alternative applications. It is well known that with a radar system it is possible to identify the micro-Doppler feature of a target, to detect the nature of the target itself (what the target is) or how it is vibrating. In fact, thanks to their high transmission frequency, large bandwidth and very short chirp signals, radars designed for automotive applications are able to provide sub-millimeter resolution and a large detection bandwidth, to the point that it is here proposed to exploit them in the vibrational analysis of a target. The aim is to evaluate what information on the vibrations can be extracted, and what are the performance obtainable. In the present work, the use of a commercial Frequency Modulated Continuous Wave radar is described, and the performances achieved in terms of displacement and vibration frequency measurement of the target are compared with the measurement results obtained through a laser vibrometer, considered as the reference instrument. The attained experimental results show that the radar under test and the reference laser vibrometer achieve comparable outcomes, even in a cluttered scenario.

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“…They developed a GBSAR comprised of 12 transmitters and 12 receiver antennas as an alternative to mechanical rail. Several recent studies approve the capability of W-band MIMO radars for structural monitoring (Ciattaglia et al, 2020;GAMBI et al, 2019;Hosseiny et al, 2021b). Baumann-Ouyang et al (2021) evaluated the capabilities of a MIMO radar with twelve transmitters and sixteen receiver antennas, called TIDEP-01012 from Texas Instruments (TI), for structural monitoring in varied weather conditions.…”

Section: Introductionmentioning

confidence: 99%