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Energy-self-feeding visible light wireless communication system

A wireless communication system and visible light technology, applied in the field of visible light communication, can solve the problems of restricting the free mobility of receivers, unable to continuously supply power for a long time, etc., to achieve the effect of energy self-sufficiency

Inactive Publication Date: 2014-11-26
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

This limits the free mobility of the receiver
However, the battery power supply cannot last for a long time

Method used

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  • Energy-self-feeding visible light wireless communication system
  • Energy-self-feeding visible light wireless communication system

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Embodiment Construction

[0024] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0025] The energy self-sufficient visible light wireless communication system provided by the present invention transmits the signal by the computer, loads the signal to the LED light source through the signal transmission modulation module, converts the 0 and 1 in the digital signal into the change of the light intensity, and transmits it through the free space . At the receiving end, a silicon photocell is used as a detector, and based on the principle of photoelectric conversion, the changing light intensity signal is converted into a corresponding voltage signal. The back end separates the DC component and the AC component of the voltage through a filter circuit. The DC voltage charges the battery, enabling energy st...

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Abstract

The invention discloses an energy-self-feeding visible light wireless communication system. A computer sends signals to a signal sending modulation module which carries out modulation the signals and loads the signals to an LED direct-current driving power supply, so that the output current of the direct-current driving power supply comprises a direct-current component and a modulation current component. The direct-current component provides power for an LED light source. The modulation current component is correspondingly converted to changing of light intensity and is transmitted through free space. A silicon photocell array is used as a detector and receives light emitted by the LED light source, and light is converted into voltage. Silicon photocell array output voltage comprises a direct-current voltage component and an alternating voltage component. The direct-current voltage component provides power for a data storage and an amplifying demodulator circuit. The alternating voltage component carries out demodulation through the amplifying demodulator circuit, so that original signals are obtained in a restoring mode, and communication is completed. According to the energy-self-feeding visible light wireless communication system, an external power supply is of no need, light energy reusing and system self energy providing are achieved, and the practical application of visible light communication can be well achieved.

Description

technical field [0001] The present invention relates to the technical field of visible light communication, in particular to an energy self-sufficient visible light wireless communication system based on light energy multiplexing technology and system self-energy supply technology. Background technique [0002] The LED-based visible light communication (VLC) system integrates lighting and communication, and is an emerging optical wireless communication technology. LED light source has the characteristics of fast response, long life and low power consumption. In recent years, with the continuous improvement of LED luminous efficiency, LED is gradually replacing incandescent lamps as the next generation of lighting sources. VLC has higher security and privacy, does not generate electromagnetic interference, and does not require the license authorization of the corresponding frequency band. It is another wireless communication method besides radio frequency communication. VLC...

Claims

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Application Information

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IPC IPC(8): H04B10/116H02S10/00H02S10/20
CPCY02E10/50Y02E70/30
Inventor 陈雄斌郭俊清李洪磊陈弘达
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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