ACCURATE DETERMINATION OF REMAINING TIME TO BATTERY EMPTY IN A POWERED AIR PURIFYING RESPIRATOR

A powered air purifying respirator (PAPR) that alerts when remaining battery time is below a predefined threshold. The powered air purifying respirator comprises an electric motor mechanically coupled to a blower, a battery coupled to the electric motor, an alarm device, and an electronic controller...

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Bibliographic Details
Main Authors PALACHARLA, PRAVEEN KUMAR, PATIL, SWAPNIL GOPAL
Format Patent
LanguageEnglish
French
German
Published 27.01.2016
Subjects
CALCULATING
COMPUTING
COUNTING
DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
ELECTRIC DIGITAL DATA PROCESSING
FIRE-FIGHTING
HUMAN NECESSITIES
LIFE-SAVING
PHYSICS
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Summary:A powered air purifying respirator (PAPR) that alerts when remaining battery time is below a predefined threshold. The powered air purifying respirator comprises an electric motor mechanically coupled to a blower, a battery coupled to the electric motor, an alarm device, and an electronic controller. The electronic controller determines a second battery time remaining value and actuates the alarm device when the second battery time remaining value is less than a predefined threshold, wherein the controller determines the second battery time remaining value based on indexing into a look-up table of values with a first battery time remaining value and a battery voltage.
Bibliography:Application Number: EP20120865718