Front-end equipment power supply voltage detection circuit for video monitoring system, and electronic monitoring equipment

Abstract

The invention is suitable for the field of electronics and particularly relates to a front-end equipment power supply voltage detection circuit for a video monitoring system, and electronic monitoring equipment. The detection circuit comprises a voltage signal acquisition module and a voltage signal detection module, wherein the voltage signal acquisition module acquires an alternating voltage signal or a direct voltage signal, converts the alternating voltage signal into the direct voltage signal through rectification and then converts the converted direct voltage signal to an optical signal and outputs the optical signal, and directly converts the direct voltage signal into an optical signal and outputs the optical signal; and the voltage signal detection module is connected with the voltage signal acquisition module and converts the input optical signals into electrical signals and performs comparative judgment on the electrical signals and normal working voltage of front-end equipment. The detection circuit can perform electrical isolation, alternating current and direct current identification, and voltage measurement on the front-end equipment power supply voltage in the video monitoring system, the detected information can be returned to a rear end, and the phenomenon that the problems are solved only when the front-end equipment works abnormally, so the whole monitoring system is influenced is avoided. Moreover, the detection circuit has the advantages of simple structure, reasonable design, safety and reliability and the like.

Description

technical field [0001] The invention belongs to the field of electronics, and in particular relates to a power supply voltage detection circuit for front-end equipment of a video monitoring system and electronic monitoring equipment. Background technique [0002] The performance of the video surveillance system must be stable in order to achieve a good monitoring effect, so there are high requirements for the stability of the front-end equipment of the video surveillance system. This requires that the power supply voltage of the front-end equipment must reach the rated voltage for normal operation, otherwise the front-end equipment cannot work normally because the voltage is too low. However, the working environment of the front-end equipment is relatively complicated, and the distribution is not concentrated, which will lead to too long power supply wires and insufficient voltage of the front-end equipment; low voltage of the power supply terminal, and long-term operation o...

AI Technical Summary

Problems solved by technology

At present, there is still a lack of a low-cost, safe, reliable and convenient troubleshooting device for constantly detecting the power supply mode and voltage of the front-end equipment

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