Metering device state evaluation system based on Internet of Things

The utility model discloses a metering device state evaluation system based on Internet of things, comprising a signal acquisition processing module, a controller module, a power supply module, a communication module and an upper computer, and the signal acquisition processing module comprises a current transformer, a signal conditioning unit and a digital-to-analog conversion unit. The whole hardware core is a controller module which controls peripheral data sampling, and a current sampling input channel firstly collects original signals through a current sensor and then filters on-site data noise through a signal modulation unit; analog signals are converted into digital signals through the digital-to-analog conversion unit, the digital signals are transmitted to the controller module, and the controller module uploads data to an upper computer through the communication module. Monitoring indexes comprise three-phase current, three-phase current abrupt change and three-phase unbalanced ...