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 26.11.2014
Subjects
CALCULATING
CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER
COMPUTING
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
COUNTING
DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
ELECTRIC DIGITAL DATA PROCESSING
ELECTRICITY
FIRE-FIGHTING
GENERATION
HUMAN NECESSITIES
LIFE-SAVING
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
SYSTEMS FOR STORING ELECTRIC ENERGY
TESTING
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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