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.
申请公布号
US4596933(A)
申请公布日期
1986.06.24
申请号
US19840662656
申请日期
1984.10.19
申请人
THE UNITED STATES OF AMERICA AS REPRESENTED BY THE UNITED STATES DEPARTMENT OF ENERGY
发明人
WAECHTER, DAVID A.;BJARKE, GEORGE O.;TRUJILLO, FAUSTIN;WOLF, MICHAEL A.;UMBARGER, C. JOHN