The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 29, 2026
Filed:
Oct. 06, 2021
Iucf-hyu (Industry-university Cooperation Foundation Hanyang University), Seoul, KR;
Abstract
An apparatus and method are provided for non-contact measurement of fan RPM using an IR-UWB radar. A reflected radar signal is processed to obtain variance values for each position, from which a first position closest to the radar and a second position furthest from the radar are determined. Fast Fourier transform (FFT) calculations are performed on the reflected signals corresponding to the first and second positions, and the second FFT signal is subtracted from the first FFT signal to determine the RPM of the fan. This approach enables accurate RPM measurement without reliance on lighting conditions or additional markers, providing high reliability across different fan and radar arrangements.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile