Imperial College London
Portrait Picture

ProfessorJulieMcCann

Faculty of Engineering, Department of Computing

Vice-Dean (Research) for the Faculty of Engineering
 
 
 
//

Contact

 

+44 (0)20 7594 8375j.mccann Website

 
 
//

Assistant

 

Miss Teresa Ng +44 (0)20 7594 8300

 
//

Location

 

260ACE ExtensionSouth Kensington Campus

//

Summary

 

Publications

Citation

BibTex format

@inproceedings{Heggo:2022:10.1109/IPSN54338.2022.00039,
author = {Heggo, M and Bhatia, L and McCann, J},
doi = {10.1109/IPSN54338.2022.00039},
pages = {403--414},
publisher = {IEEE},
title = {RFTacho: Non-intrusive RF monitoring of rotating machines},
url = {http://dx.doi.org/10.1109/IPSN54338.2022.00039},
year = {2022}
}
Download

RIS format (EndNote, RefMan)

TY  - CPAPER
AB  - Measuring rotation speed is essential to many engineering applications; it elicits faults undetectable by vibration monitoring alone and enhances the vibration signal analysis of rotating machines. Optical, magnetic or mechanical Tachometers are currently state-of-art. Their limitations are they require line-of-sight, direct access to the rotating object. This paper proposes RFTacho, a rotation speed measurement system that leverages novel hardware and signal processing algorithms to produce highly accurate readings conveniently. RFTacho uses RF Orbital Angular Momentum (OAM) waves to measure rotation speed of multiple machines simultaneously with no requirements from the machine’s properties. OAM antennas allow it to operate in high-scattering environments, commonly found in industries, as they are resilient to de-polarization compared to linearly polarized antennas. RFTacho achieves this by using two novel signal processing algorithms to extract therotation speed of several rotating objects simultaneously amidst noise arising from high-scattering environments, non-line-of-sight scenarios and dynamic environmental conditions with a resolution of 1. We test RFTacho on several real-world machines like fans, motors, air conditioners. Results show that RFTacho has avg. error of < 0.5% compared to ground truth. We demonstrate RFTacho’s simultaneous multiple-object measurement capability that other tachometers do not have. Initial experiments show that RFTacho can measure speeds as high as 7000 rpm (theoretically 60000 rpm) with high resiliency at different coverage distances and orientation angles, requiring only 150 mW transmit power while operating in the 5 GHz license-exempt band. RFTacho is the first RF-based sensing system that combines OAM waves and novel processing approaches to measure the rotation speed of multiple machines simultaneously in a non-intrusive way.
AU  - Heggo,M
AU  - Bhatia,L
AU  - McCann,J
DO  - 10.1109/IPSN54338.2022.00039
EP  - 414
PB  - IEEE
PY  - 2022///
SP  - 403
TI  - RFTacho: Non-intrusive RF monitoring of rotating machines
UR  - http://dx.doi.org/10.1109/IPSN54338.2022.00039
UR  - http://wp.doc.ic.ac.uk/aese/people/dr-mohammad-heggo/
UR  - https://ieeexplore.ieee.org/document/9825971
UR  - http://hdl.handle.net/10044/1/95120
ER  -
Download