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:
Oct. 27, 2020
Filed:
May. 25, 2018
Raymond Hoheisel, Arlington, VA (US);
Raymond Hoheisel, Arlington, VA (US);
Other;
Abstract
A humidity meter includes a humidity sensor, a heating device oriented towards the humidity sensor, a signal generator capable of modulating a power output of the heating device, and a lock-in amplifier capable of demodulating a response signal of the humidity sensor as induced by the modulated heating device. A method of measuring humidity includes the steps of providing a humidity sensor positioned along a channel, a heating device positioned opposite the humidity sensor along the channel, and a controller including a signal generator and a lock-in amplifier; providing an airflow along the channel; modulating a power supply to the heating device using the signal generator; and demodulating a response signal of the humidity sensor induced by the modulated heating device.