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:
Aug. 22, 1995
Filed:
Jun. 07, 1993
Ting-I Wang, Gaithersburg, MD (US);
Scientific Technology, Inc., Gaithersburg, MD (US);
Abstract
A weather identification system is provided which employs a first photosensitive receiver positioned directly in the path of a beam of light a predetermined distance from a partially coherent light beam source. The first photosensitive receiver is in direct optical communication with the light beam source to produce electronic signals in response to scintillations caused by particle movement between the source and the first receiver. Signals from the detected scintillations are filtered to provide an output having a frequency range above one kilohertz indicative of rain intensity, and a second output having a frequency range lower than two hundred fifty hertz indicative of snow intensity. A second photosensitive receiver is positioned out of the path of the beam of light and is oriented at an oblique angle relative thereto to provide an output indicative of forward scattering of light from scintillations that occur in the beam of light. The signals from the second photosensitive receiver provide an output having a signal strength characteristic of visibility. The weather identification system thereby senses precipitation, categorizes the precipitation as either rain or snow, and measures visibility. The weather condition indicating system is ideal for use in remotely monitoring airfields.