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:
Jun. 25, 2019
Filed:
Oct. 05, 2016
Ford Global Technologies, Llc, Dearborn, MI (US);
Michael McQuillen, Warren, MI (US);
Gopichandra Surnilla, West Bloomfield, MI (US);
Douglas Blue, Plymouth, MI (US);
Richard E. Soltis, Saline, MI (US);
Daniel A. Makled, Dearborn, MI (US);
Mohannad Hakeem, Dearborn, MI (US);
Ford Global Technologies, LLC, Dearborn, MI (US);
Abstract
Methods and systems are provided for conducting measurements of relative humidity using an ultrasonic sensor. In one example, a plurality of ultrasonic signals having different frequencies are transmitted from a single sensor, and attenuation values of reflected signals are determined only for those signals determined to have the same transit time from transmission to receipt, and where frequency of the plurality of ultrasonic signals may be changed responsive to an indication that the signals may be below a signal-to-noise threshold. In this way, by determining a difference between attenuation values between pairs of signals, where the signals comprise different frequencies and where the signals comprise the same transit times, relative humidity may be accurately determined.