An Internet of Things data security signal transmission system

Abstract

The invention discloses a data security signal transmission system of the Internet of Things, which includes a photoelectric conversion amplifier circuit, a voltage comparison circuit, a sine wave oscillation circuit and a frequency modulation transmission circuit. The signal is sampled and its optical power is converted into a fiber optic voltage. The voltage comparison circuit compares the fiber optic voltage with the upper limit of the standard voltage and the lower limit of the standard voltage. The power detection signal is obtained, the sine wave oscillation circuit determines the frequency of the sine wave modulation signal according to the positive and negative of the power detection signal, and the frequency modulation transmitting circuit performs FM modulation on the sine wave modulation signal to obtain the power conditioning signal, and transmits the power conditioning signal to the radio and television material Network power monitoring and control terminal, so that the radio and television Internet of Things power monitoring and control terminal can adjust 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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