Fecha de publicación: 25/10/2019 Fuente: Wipo "IOT" The utility model discloses a cold chain monitoring system based on NB-IoT. PRINTED MAIN CONTROL PANEL, a microprocessor unit is arranged on the PCB main control board; the microprocessor unit is electrically connected with the lithium battery power supply unit, the sensor unit and the wireless communication NB-IoT unit. Wherein the sensor unit is used for detecting temperature and humidity data in real time and transmitting the temperature and humidity data to the cloud platform in real time through the wireless communication NB-IOT unit, and the lithium battery power supply unit supplies power to the microprocessor unit, the sensor unit and the wireless communication NB-IOT unit. According to the NB-IoT-based cold chain monitoring system of the utility model, a fixed recording period canbe set according to the requirements of customers, and the real-time temperature and humidity data of a current monitoring object and various box opening and closing states of the object can be recorded. And a comprehensive information display window is provided to display the running state of the current equipment. And the data is uploaded to a data cloud platform in real time through a wirelesscommunication mode NB-IoT, and meanwhile, the power consumption of the equipment is greatly reduced.