Internet of Things data security signal transmission system

Abstract

The invention discloses an Internet of Things data security signal transmission system, which comprises a photoelectric conversion amplification circuit, a voltage comparison circuit, a sine wave oscillation circuit and a frequency modulation transmission circuit, and is characterized in that the photoelectric conversion amplification circuit adopts a PIN photodiode D1 to sample an incoming fiberoptical signal of an optical transmitter and converts the optical power of the incoming fiber optical signal into an incoming fiber optical voltage; the voltage comparison circuit compares the fiber-in photovoltage with a standard voltage upper limit and a standard voltage lower limit, when the fiber-in photovoltage is not within the range of the standard voltage upper limit and the standard voltage lower limit, a power detection signal is obtained, and the sine wave oscillation circuit determines the frequency of generating a sine wave modulation signal according to the positive and negativeof the power detection signal. And the frequency modulation transmitting circuit performs frequency modulation on the sine wave modulation signal to obtain a power conditioning signal, and transmits the power conditioning signal to the radio and television Internet of Things power monitoring control terminal, so that the radio and television Internet of Things power monitoring control terminal adjusts the optical power of the radio and television Internet of Things optical transmitter.

Description

technical field [0001] The invention relates to the technical field of data security, in particular to an Internet of Things data security signal transmission system. Background technique [0002] At present, the radio and television Internet of things has developed into an era dominated by optical fiber networks. With the sharp drop in the price of 1550nm optical transmitters and erbium-doped fiber amplifiers EDFA, 1550nm optical transmission technology has been widely used. However, in 1550nm optical transmission networks , when the optical power of the optical signal injected by the optical transmitter into the optical fiber is too low, the optical signal will be greatly attenuated during long-distance transmission, and data packet loss will easily occur; when the optical signal injected by the optical transmitter into the optical fiber When the power is higher than the SBS threshold, the stimulated Brillouin scattering (SBS) phenomenon will occur, the optical signal inde...

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Problems solved by technology

[0002] At present, the radio and television Internet of things has developed into an era dominated by optical fiber networks. With the sharp drop in the price of 1550nm optical transmitters and erbium-doped fiber amplifiers EDFA, 1550nm optical transmission technology has been widely used. However, in 1550nm optical transmission networks , when the optical power of the optical signal injected by the optical transmitter into the optical fiber is too low, the optical signal will be greatly attenuated during long-distance transmission, and data packet loss will easily occur; when the optical signal injected by the optical transmitter into the optical fiber When the power is higher than the SBS threshold, the stimulated Brillouin scattering (SBS) phenomenon will occur, the optical signal index will drop sharply, and it will cause serious dispersion in the long distance, which will distort the optical signal waveform and cause intersymbol crosstalk. Therefore, when the optical When the optical power injected by the transmitter into the optical fiber is too high or too low, the quality of the optical signal will be reduced and the security performance of data transmission will be affected.

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