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Title: Batteryless magneto-driven portable radiac

Abstract

A hand-powerd alternator for generating an alternating voltage provides same through a rectifier to a high capacity capacitor which stores the resultant dc voltage and drives a voltage regulator to provide a constant low voltage output for a portable radiation detection instrument. The instrument includes a Geiger-Mueller detector tube whose output is fed to a pulse detector and then through an event counter and LCD driver circuit to an LCD bar graph for visual display. An audio driver and an audio output is also provided. All circuitry used is low power so that the capacitor can be readily charged to a sufficient level to provide power for at least 30 minutes. A low voltage indicator is provided on the LCD display to indicate the need for manual recharging.

Inventors:
; ; ; ;
Issue Date:
OSTI Identifier:
5712121
Application Number:
ON: DE85011622
Assignee:
Dept. of Energy EDB-85-087782
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; GEIGER-MUELLER COUNTERS; ALTERNATORS; CAPACITORS; DISPLAY DEVICES; ELECTRONIC CIRCUITS; PORTABLE EQUIPMENT; RECTIFIERS; ELECTRIC GENERATORS; ELECTRICAL EQUIPMENT; EQUIPMENT; MEASURING INSTRUMENTS; RADIATION DETECTORS; 440101* - Radiation Instrumentation- General Detectors or Monitors & Radiometric Instruments

Citation Formats

Waechter, D.A., Bjarke, G.O., Trujillo, F., Wolf, M.A., and Umbarger, C.J. Batteryless magneto-driven portable radiac. United States: N. p., 1984. Web.
Waechter, D.A., Bjarke, G.O., Trujillo, F., Wolf, M.A., & Umbarger, C.J. Batteryless magneto-driven portable radiac. United States.
Waechter, D.A., Bjarke, G.O., Trujillo, F., Wolf, M.A., and Umbarger, C.J. Fri . "Batteryless magneto-driven portable radiac". United States.
@article{osti_5712121,
title = {Batteryless magneto-driven portable radiac},
author = {Waechter, D.A. and Bjarke, G.O. and Trujillo, F. and Wolf, M.A. and Umbarger, C.J.},
abstractNote = {A hand-powerd alternator for generating an alternating voltage provides same through a rectifier to a high capacity capacitor which stores the resultant dc voltage and drives a voltage regulator to provide a constant low voltage output for a portable radiation detection instrument. The instrument includes a Geiger-Mueller detector tube whose output is fed to a pulse detector and then through an event counter and LCD driver circuit to an LCD bar graph for visual display. An audio driver and an audio output is also provided. All circuitry used is low power so that the capacitor can be readily charged to a sufficient level to provide power for at least 30 minutes. A low voltage indicator is provided on the LCD display to indicate the need for manual recharging.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1984},
month = {10}
}