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    • 3. 发明授权
    • Work helmet having transmitter-receiver for light signal
    • 工作头盔具有光信号发射机
    • US4648131A
    • 1987-03-03
    • US657533
    • 1984-10-04
    • Toshiyuki KawaguchiHiroyuki KatsukawaKazumi NakanishiNaoki Tanaka
    • Toshiyuki KawaguchiHiroyuki KatsukawaKazumi NakanishiNaoki Tanaka
    • A42B3/00A42B1/24A42B3/30H04B9/00
    • H04B10/1143A42B3/30Y10S2/906
    • A work helmet for effecting an intercommunication between workers as well as between a central control room and respective workers, especially used for informing each workers of guide information adequate for emergency escape when a disaster occurs is disclosed. To this end, the work helmet includes a light-receiving element for receiving a light signal modulated with the guide information, an earphone for reproducing audibly the guide information, a light emitting element for emitting an outgoing light signal modulated with a speech signal supplied from a microphone, and an oscillator for generating a carrier having a frequency specific to the helmet, on which carrier said speech signal is modulated, so that the outgoing light signal is always modulated by the carrier serving as a helmet identifying signal by means of which the central control room can recognize and identify the worker wearing the helmet.
    • 公开了一种工作头盔,用于实现工人之间以及中央控制室与各自工作人员之间的相互沟通,特别是用于在发生灾害时向每个工作人员通报足够的紧急逃生指导信息。 为此,工作头盔包括用于接收用导向信息调制的光信号的光接收元件,用于再现听觉地引导信息的耳机;发光元件,用于发射由从 麦克风和用于产生具有头盔特有频率的载波的振荡器,载波上的所述语音信号被调制,使得出射光信号总是被作为头盔识别信号的载波调制,借助于该头盔识别信号, 中央控制室可以识别和识别戴头盔的工人。