Batteryless magneto-driven portable radiac
Abstract
A hand-powered 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-Muller 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:
-
- Los Alamos, NM
- Issue Date:
- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- OSTI Identifier:
- 865896
- Patent Number(s):
- 4596933
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01T - MEASUREMENT OF NUCLEAR OR X-RADIATION
- DOE Contract Number:
- W-7405-ENG-36
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- batteryless; magneto-driven; portable; radiac; hand-powered; alternator; generating; alternating; voltage; provides; rectifier; capacity; capacitor; stores; resultant; dc; drives; regulator; provide; constant; output; radiation; detection; instrument; geiger-muller; detector; tube; fed; pulse; event; counter; lcd; driver; circuit; bar; graph; visual; display; audio; provided; circuitry; power; readily; charged; sufficient; level; 30; minutes; indicator; indicate; manual; recharging; visual display; voltage regulator; pulse detector; voltage output; dc voltage; radiation detection; detector tube; detection instrument; event count; voltage provide; alternating voltage; /250/
Citation Formats
Waechter, David A, Bjarke, George O, Trujillo, Faustin, Wolf, Michael A, and Umbarger, C John. Batteryless magneto-driven portable radiac. United States: N. p., 1986.
Web.
Waechter, David A, Bjarke, George O, Trujillo, Faustin, Wolf, Michael A, & Umbarger, C John. Batteryless magneto-driven portable radiac. United States.
Waechter, David A, Bjarke, George O, Trujillo, Faustin, Wolf, Michael A, and Umbarger, C John. Wed .
"Batteryless magneto-driven portable radiac". United States. https://www.osti.gov/servlets/purl/865896.
@article{osti_865896,
title = {Batteryless magneto-driven portable radiac},
author = {Waechter, David A and Bjarke, George O and Trujillo, Faustin and Wolf, Michael A and Umbarger, C John},
abstractNote = {A hand-powered 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-Muller 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 = {Wed Jan 01 00:00:00 EST 1986},
month = {Wed Jan 01 00:00:00 EST 1986}
}