An Angular Displacement Sensor Based on Microwave Transversal Signal Interference Principle

Chio, Chi-Hou; Gómez‐García, Roberto; Yang, Li; Tam, Kam Weng; Choi, Wai‐Wa; Ho, Samuel K. M.

doi:10.1109/jsen.2020.2998181

Cited by 21 publications

(4 citation statements)

References 34 publications

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“…Several microwave sensing techniques for angular displacement [14]- [19] and speed measurement [10]- [12] have…”

Section: Introductionmentioning

confidence: 99%

“…been proposed in the literature. The transversal signal interference technique was employed in [14], [15] for the detection of angular displacement. The technique consists of a fixed-length transmission line on one path and a variable-length on the other.…”

Section: Introductionmentioning

confidence: 99%

“…The technique consists of a fixed-length transmission line on one path and a variable-length on the other. In [14], the variable-length transmission line was achieved by implementing an open-ended stub on a circular disc such that by rotating the rotor, the contact point of the stub on the stator changes, thereby changing the effective length of the variable-length transmission line, and hence the intertransmission zeros of the dual-path transversal interference circuit. An angular displacement detection range of 180° was achieved with a dynamic range of 90°.…”

Section: Introductionmentioning

confidence: 99%

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Polarimetric Microwave Sensor for Angular Speed Measurement

2022

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This paper presents a design methodology and prototyping of an angular speed sensor based on microwave polarimetry. The detection mechanism relies on the transmission response of a dual-polarized circular aperture irradiating an array of regularly spaced copper traces. The generated response is a regular pulse train defined by the location of a copper trace with reference to the center of the circular aperture. For speed measurement, the response was acquired within a 10s duration with the circular aperture response effectively sampled at 100 Hz. The acquired response was analyzed in the frequency domain using Fast Fourier Transform (FFT) and the rotor speed was obtained from the frequency spectrum of the acquired pulse train. The detection system can detect speeds as low as 0.4 RPM with an upper limit of 5000 RPM limited by the maximum sampling rate of the acquisition system. With the adoption of the FFT technique for speed estimation, the proposed angular speed measurement system can instantaneously detect angular speed with a maximum absolute estimation error of 0.0625 RPM within the 10 s acquisition time. The rotor occupies an area of 84.64 cm 2 .

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“…Several microwave sensing techniques for angular displacement [14]- [19] and speed measurement [10]- [12] have…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Polarimetric Microwave Sensor for Angular Speed Measurement

2022

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“…Most research has focused on the angular rotation speed. Angular speed measurement is urgently required in control applications and turbo machines [21][22][23][24][25][26][27][28][29][30]. In this letter, we proposed a pitch and yaw angular speed measurement based on line scan vision.…”

Section: Introductionmentioning

confidence: 99%

Pitch and yaw angular speed measurement using Kalman data fusion

Wang

2022

IEICE Electron. Express

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Pitch and yaw angular speed measurements are vitally important parameters for monitoring the condition of precision machines. In this letter, we propose a dynamic pitch and yaw angular speed measurement system based on line scan vision. The characteristic line scan image can be considered a discrete time sequence, and each column of pixels represents a different time. A double light-spot centroid and double Gaussian fitting algorithm are developed to obtain the centroid coordinates. Kalman data fusion is employed to enhance the accuracy of the obtained measurement results. The experimental results prove that the proposed method is effective and highly accuracy.

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