Subway construction Internet of Things signal anti-interference transmission system

Abstract

The invention discloses a subway construction Internet of Things signal anti-interference transmission system, which comprises a filtering amplitude modulation circuit, an abnormal current detection circuit, a current stabilizing circuit and a signal enhancing circuit, and is characterized in that the filtering amplitude modulation circuit controls the voltage adjustment of a subway construction Internet of Things signal through the conduction of a triode Q2, the abnormal current detection circuit detects the forward amplitude of the subway construction Internet of Things signal through charging and discharging of a capacitor C6, the reverse amplitude of the subway construction Internet of Things signal is obtained through an operational amplifier AR2, and the reverse amplitude is comparedwith the voltage of the subway construction Internet of Things signal so as to detect the overcurrent condition of the subway construction Internet of Things signal; the current stabilizing circuit absorbs electromagnetic interference energy through a strong electromagnetic interference absorption network composed of resistors R19-R22, capacitors C11-C12 and inductors L3-L4, the signal enhancingcircuit combines and amplifies subway construction Internet of Things signals output by the filtering amplitude modulation circuit and the current stabilizing circuit so as to restrain current abnormity brought by electromagnetic interference to a subway construction Internet of Things signal receiving circuit. and the phenomena of data loss and transmission errors in transmission are prevented.

Description

technical field [0001] The invention relates to the technical field of signal subway construction, in particular to an anti-interference transmission system for subway construction Internet of Things signal. Background technique [0002] The subway has become an indispensable means of transportation for people. Every city is vigorously building the subway. However, the construction environment of the subway is underground. Due to the uncertainty of the mechanical parameters of the ground and the unpredictability of the construction process, the underground engineering design and construction It is inevitable that there will be situations that do not conform to the actual stratum conditions. Therefore, it is necessary to use the subway construction Internet of Things to monitor the subway construction information during the construction process and upload it to the monitoring technicians so that they can process, analyze and feed back to the construction and design in a timely...

AI Technical Summary

Problems solved by technology

[0002] The subway has become an indispensable means of transportation for people. Every city is vigorously building the subway. However, the construction environment of the subway is underground. Due to the uncertainty of the mechanical parameters of the ground and the unpredictability of the construction process, the underground engineering design and construction It is inevitable that there will be situations that do not conform to the actual stratum conditions. Therefore, it is necessary to use the subway construction Internet of Things to monitor the subway construction information during the construction process and upload it to the monitoring technicians so that they can process, analyze and feed back to the construction and design in a timely manner, and then through The feedback of monitoring information is used to correct the design and guide the construction; however, because the electrical equipment of the subway construction will generate strong electromagnetic radiation interference, some high-power radio stations near the subway construction site will also generate electromagnetic field interference due to the current change of the signal, which will affect the construction of the subway. The safe transmission of networked signals, such as the occurrence of network ripples when transmitting images, can seriously even lead to loss of data transmission and transmission errors

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