3-D Deformation Measurement Based on Three GB-MIMO Radar Systems: Experimental Verification and Accuracy Analysis

Deng, Yunkai; Hu, Cheng; Tian, Weiming; Zhao, Zheng

doi:10.1109/lgrs.2020.3014342

Cited by 20 publications

(12 citation statements)

References 9 publications

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“…First Case: Urban Area 4.1.1. Experiment Information Figure 6 shows the photo of the ground-based multiple-input-multiple-output (GB-MIMO) radar, which uses 16 transmitting antennas and 16 receiving antennas to synthesize an equivalent linear array with 256 phase centers [21]. The GB-MIMO radar works at the Ku-band, and its transmitted signal is frequency-modulated continuous wave.…”

Section: Resultsmentioning

confidence: 99%

Repositioning Error Compensation in Discontinuous Ground-Based SAR Monitoring

Zhu

Deng

et al. 2021

Remote Sensing

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The discontinuous mode of ground-based synthetic aperture radar (GB-SAR) is suitable for monitoring creep landslides. However, the instrument needs to be installed and disassembled repeatedly, which could inevitably cause repositioning error, and severely affect the accuracy of deformation measurements. This paper performs a detailed theoretical analysis of the repositioning error based on the Taylor expansion of a ternary function, and it can be built as a linear multi-parameter model. Simulations are made to validate the effectiveness of this model compared with two common first-order and second-order models. Then a compensation method based on the permanent scatterer (PS) technique is proposed. Two experiments of discontinuous monitoring are discussed. The first one is an equivalent discontinuous experiment, which utilizes two corner reflectors to evaluate the compensation accuracy. The other one is a discontinuous experiment taken on a steep mountain. Compared with the common methods, the proposed method can better compensate for the error phase and benefit high-precision deformation monitoring.

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Section: Resultsmentioning

confidence: 99%

Repositioning Error Compensation in Discontinuous Ground-Based SAR Monitoring

Zhu

Deng

et al. 2021

Remote Sensing

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“…The key problems in multistatic measurements, including multistatic image registration and 3D deformation inversion, are solved. The experimental results prove that the measurement accuracy of the 3D deformations based on the use of a displaceable corner reflector as the imaging target can reach the millimeter level, affording its first realization worldwide in GB-DInRad applications [1].…”

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confidence: 78%

“…This technique offers fast image acquisition and high measurement accuracy (Figure 1(a)). The proposed GB-MIMO radar based on the MIMO technique was employed for 3D deformation measurements for the first time worldwide in GB-DInRad applications [1].…”

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confidence: 99%

Multistatic ground-based differential interferometric MIMO radar for 3D deformation measurement

Deng

Tian

2021

Sci. China Inf. Sci.

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“…In a different approach, two components of the displacement vector are determined with a multiple input, multiple output (MIMO) GBR [ 26 ]. The principle is also implemented in the synthetic aperture mode [ 27 ].…”

Section: Introductionmentioning

confidence: 99%

Advancing Ground-Based Radar Processing for Bridge Infrastructure Monitoring

Michel

Keller

2021

Sensors

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In this study, we further develop the processing of ground-based interferometric radar measurements for the application of bridge monitoring. Applying ground-based radar in such complex setups or long measurement durations requires advanced processing steps to receive accurate measurements. These steps involve removing external influences from the measurement and evaluating the measurement uncertainty during processing. External influences include disturbances caused by objects moving through the signal, static clutter from additional scatterers, and changes in atmospheric properties. After removing these influences, the line-of-sight displacement vectors, measured by multiple ground-based radars, are decomposed into three-dimensional displacement components. The advanced processing steps are applied exemplarily on measurements with two sensors at a prestressed concrete bridge near Coburg (Germany). The external influences are successfully removed, and two components of the three-dimensional displacement vector are determined. A measurement uncertainty of less than 0.1mm is achieved for the discussed application.

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3-D Deformation Measurement Based on Three GB-MIMO Radar Systems: Experimental Verification and Accuracy Analysis

Cited by 20 publications

References 9 publications

Repositioning Error Compensation in Discontinuous Ground-Based SAR Monitoring

Repositioning Error Compensation in Discontinuous Ground-Based SAR Monitoring

Multistatic ground-based differential interferometric MIMO radar for 3D deformation measurement

Advancing Ground-Based Radar Processing for Bridge Infrastructure Monitoring

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