| 摘要 |
PURPOSE: A warning light system is provided to exactly output a siren and voice signals from a speaker by amplifying an operating signal of the speaker, to compact a warning light module, to simplify an installing process, to minimize the effect from external noise by eliminating wirings between a control unit and an oscillating unit, and to improve the stability and the durability by installing a voltage filter inside the warning light module. CONSTITUTION: A control box(10) comprises a control panel(12) with many control buttons, an oscillating unit(14) to generate oscillating signals and a front amplifying unit(16) to amplify the oscillating signals. A warning light module(20) contains a speaker(24) and many warning lights(25) to be exposed on a roof. The warning light module contains an amplifying output unit(23) and a control unit(21) therein. The amplifying output unit is electrically connected between the front amplifying unit and the speaker to amplify the amplified oscillating signal again and to input the amplified signal to the speaker. The control unit controls the warning lights and the amplifying output unit by controlling feeding voltage to the warning lights and the amplifying output unit according to the control panel. Thereby, the warning lights and the amplifying output unit are operated stably.
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