Abstract
Recently, radar based micro-Doppler signature analysis has been successfully applied in various sectors including defence, biomedical, and automotive. This article presents the novel use of radar micro-Doppler for loudspeaker analysis.
The approach offers the potential benefits of characterizing the mechanical motion of a loudspeaker in order to identify defects and design issues. Compared with acoustic based approaches, the use of radar allows reliable measurements in an acoustically noisy end of a production line.
In addition, when compared with a laser vibrometric approach, the use of radar micro-Doppler reduces the number of measurements required and provides direct access to the information of the metallic components of the loudspeaker.In the paper experimental results and analysis of the micro-Doppler signatures of loudspeakers using low cost radar systems are presented.
Based on Thiele&Small parameters, the voice coil displacement is modelled and micro-Dopplersignatures for a single tone and a sine sweep stimulus are presented. Furthermore, in order to characterise the speaker with a single radar measurement, a methodology to measure mechanical frequency response of loudspeakers is also shown.
Index Terms - Radar, micro-Doppler, micro-Doppler analysis, loudspeaker analysis, industrial processes.
The approach offers the potential benefits of characterizing the mechanical motion of a loudspeaker in order to identify defects and design issues. Compared with acoustic based approaches, the use of radar allows reliable measurements in an acoustically noisy end of a production line.
In addition, when compared with a laser vibrometric approach, the use of radar micro-Doppler reduces the number of measurements required and provides direct access to the information of the metallic components of the loudspeaker.In the paper experimental results and analysis of the micro-Doppler signatures of loudspeakers using low cost radar systems are presented.
Based on Thiele&Small parameters, the voice coil displacement is modelled and micro-Dopplersignatures for a single tone and a sine sweep stimulus are presented. Furthermore, in order to characterise the speaker with a single radar measurement, a methodology to measure mechanical frequency response of loudspeakers is also shown.
Index Terms - Radar, micro-Doppler, micro-Doppler analysis, loudspeaker analysis, industrial processes.
| Original language | English |
|---|---|
| Article number | 10.1109/JSEN.2019.2946987 |
| Pages (from-to) | 1-1 |
| Number of pages | 1 |
| Journal | IEEE Sensors Journal |
| Volume | 20 |
| Issue number | 3 |
| Early online date | 11 Oct 2019 |
| DOIs | |
| Publication status | Published - 11 Oct 2019 |