Oil, water, and ice detection on road surfaces with a millimeter-wave radiometer

Auriacombe, O.; Vassilev, Vessen; Zaman, Ashraf Uz

doi:10.1117/12.2573935

Cited by 2 publications

(4 citation statements)

References 4 publications

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“…According to the complex permittivity model of water [1], the complex permittivity of pure water at 20 • C and 94 GHz is 8.10 − 13.56i. According to (13), the PDoP of water is 0.3819 when θ = 50 • . Regardless of the measurement error, P DoP = 0.3819 and θ = 50 • are substituted into (15), and the two solutions are e = 0.620 and e = 21.74, respectively.…”

Section: B Methods For Materials Classificationmentioning

confidence: 99%

“…However, θ shows that these feature parameters are governed by the incident angle, so they no longer work when the observed angle is not fixed. In order to realize the classification under variable incident angles, we hope to further retrieve the complex permittivity from these feature parameters based on (12) and (13). Since θ is usually known to the observer and LPR and PDoP can be measured by (10) and (11), there are still two unknown quantities ( and ) in ( 12) and (13).…”

Section: A Underdetermined Problemmentioning

confidence: 99%

“…To estimate = −i , we need at least two independent equations. However, (12) and (13) are not independent of each other on account of…”

Section: A Underdetermined Problemmentioning

confidence: 99%

“…independently of the time of day, MMW radiometry has been used in astronomy [2], [3] and remote sensing [4], [5], [6], [7]. Since the 1990s, with the development of MMW devices [8], MMW radiometry has been gradually applied to the information acquisition of close-range (compared with remote sensing) targets, such as the detection of guns, explosives and other dangerous goods in security inspection [9], [10], the acquisition of road type, slope, and obstacles [11], environmental mapping and monitoring [12], [13], fire fighting [14] and military applications [15], [16]. Comparing the MMW radiation Manuscript received XX XX, 2022; revised XX XX, 2022.…”

Section: Introductionmentioning

confidence: 99%

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Simplified Reflectivity Model and Its Application in Millimeter-Wave Radiometry

et al. 2022

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

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Millimeter-wave radiative sensing has been used in several close-range applications such as security checks, military detection, terrain modeling, and so on. Obtaining target information through radiometry is the goal of above applications. However, there was no method to recovery stable material information and complete geometric information through radiometry. The common problem of physically mode1-based information recovery is the solution of underdetermined equations. In this article, we analyse the multi-polarization brightness temperature model and propose the equivalent permittivity to characterize the material information and to simplify the reflectivity model. With the simplified reflectivity model, we solve the underdetermined problem in information inversion and realize the material classification and surface normal vector reconstruction. Simulations or experiment are conducted to analyse the error and suitable range of the simplified reflectivity model, and to varify the validity and accuracy of our methods of material classification and normal vector reconstruction. The results show that, our classification method is suitable for most objects at incident angle of 20 • ∼ 60 • , and our SNV estimation method is effective at all incident angle. The possible applications include liquid composition analysis, road perception, and three-dimensional reconstruction.

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Section: B Methods For Materials Classificationmentioning

confidence: 99%

Section: A Underdetermined Problemmentioning

confidence: 99%

“…To estimate = −i , we need at least two independent equations. However, (12) and (13) are not independent of each other on account of…”

Section: A Underdetermined Problemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Simplified Reflectivity Model and Its Application in Millimeter-Wave Radiometry

et al. 2022

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

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Dual-Polarised Radiometer for Road Surface Characterisation

Auriacombe

Vassilev

Pinel

2022

J Infrared Milli Terahz Waves

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This paper presents measurements using a dual-polarised radiometer operating at 93 GHz to detect ice or water on asphalt in laboratory conditions. The brightness temperatures of both H and V polarizations were measured for a dry surface, liquid water, and ice on asphalt at observation angles of 50° and 56°. The results presented in this paper demonstrate that the studied road conditions can be identified by the radiometer. The measurements are compared with a model and surface parameters, such as dielectric constant and roughness are fitted and compared to reference values. The experiments and results, described in this article, are the first steps towards the future installation of a polarimetric sensor on a moving vehicle for traffic safety.

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Oil, water, and ice detection on road surfaces with a millimeter-wave radiometer

Cited by 2 publications

References 4 publications

Simplified Reflectivity Model and Its Application in Millimeter-Wave Radiometry

Simplified Reflectivity Model and Its Application in Millimeter-Wave Radiometry

Dual-Polarised Radiometer for Road Surface Characterisation

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