Voice transmission system based on visible light
A voice transmission and visible light technology, which is applied in the field of voice transmission system based on visible light, can solve the inconvenience of underground voice communication and achieve the effect of less external interference and convenient communication
Pending Publication Date: 2018-11-23
张烁城
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[0012] In order to solve the problem of inconvenient voice communication in the existing downhole, the purpose of the present invention is to provide a voice transmission system based on visible light, which is convenient for voice communication, and to solve the above background when the underground is disturbed by the outside world. questions raised in technology
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[0028]The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0029] see Figure 1-3 , a voice transmission system based on visible light, including a secondary audio amplifier circuit 1, a first level conversion circuit 2, a primary V-F conversion circuit 3, an amplitude modulation circuit 4, a channel 5, a PD receiving circuit 6, and a secondary signal amplification circuit Circuit 7, second level conversion circuit 8, primary F-V conversion circuit 9 and primary audio amplifier circuit 10, secondary audio amplifier cir...
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The invention discloses a voice transmission system based on visible light. The voice transmission system comprises a second-stage audio amplification circuit, a first level conversion circuit, a first-stage V-F conversion circuit, an amplitude modulation circuit, a channel, a PD receiving circuit, a second-stage signal amplification circuit, a first-stage F-V conversion circuit and a first-stageaudio amplification circuit. According to the voice transmission system based on visible light provided by the invention, at a sending end, an audio signal is finally converted into a square wave signal through the second-stage audio amplification circuit, the first level conversion circuit, the first-stage V-F conversion circuit and the amplitude modulation circuit, and light modulation is performed by using an LED lamp; and at a receiving end, the visible light wave is demodulated into the square wave signal via the PD receiving circuit, the second-stage signal amplification circuit, the first-stage F-V conversion circuit and the first-stage audio amplification circuit, and the square wave signal is converted and amplified into the level capable of propelling an earphone or a horn, thereby restoring an audio magic signal on the horn. The communication is convenient, and the external interference in the pit is small.
Description
technical field [0001] The invention relates to the technical field of voice transmission, in particular to a voice transmission system based on visible light. Background technique [0002] At present, visible light voice communication is mainly used in underwater operations and mine excavation. In 2004, the Woods Hole Oceanographic Institution of the United States successfully developed a device for short-distance underwater visible light communication, which is mainly used to communicate with submarine sensors. In 2005, the Australian National University Information Science and Engineering Research Institute developed A transceiver for underwater optical communication, which is used for divers to communicate underwater because it has strong anti-interference to electromagnetic and is not easily affected by changes in the ocean environment. Due to the complexity of coal mine underground roadways, harsh environment, large electromagnetic interference and attenuation, dark l...
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CPCH04B10/116
Inventor 张烁城
Owner 张烁城