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:
Nov. 13, 2001
Filed:
May. 03, 1999
Jonathan Clements, Mirfield, GB;
Robert Chandler, Otley, GB;
Bloodhound Sensors Limited, Leeds, GB;
Abstract
The present invention discloses an apparatus for detecting one or more fluids, the apparatus comprising a sensor means having electrical properties dependent upon one or more of the presence and the concentration of one or more fluids, an electrical excitation means for applying one or more electrical excitation pulses to the sensor means, a detector means for detecting the electrical behavior of the sensor means in response to the electrical excitation means, and a transformation means for transforming an output of the detector means from the time domain to the frequency domain to determine the electrical properties of the sensor means as a function of frequency over a pre-determined frequency range. The present invention also discloses a method of detecting one or more fluids, said method comprising applying one or more electrical excitation pulses to sensor means having electrical properties dependent upon one or more of the presence and the concentration of one or more fluids, detecting the electrical response of the sensor means to application of the or each said pulse, and transforming the detected response from the time domain to the frequency domain to provide the electrical characteristics of the sensor means as a function of frequency across a predetermined frequency range.