Real-time monitoring system for temperature and humidity of cold chain logistics
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1. System significance
1) Ensure the safety supervision of perishable products such as medicines and foods in the cold chain transportation process. During the cold chain transportation process, the temperature, humidity, humidity and other data information are automatically detected and recorded in real time to effectively prevent the possible impact of product quality during storage and transportation. Various safety risks ensure the product quality during storage and transportation.
2) Establish an early warning mechanism, set the upper and lower limits of monitoring temperature and humidity, and alarm if the set value is exceeded to avoid risks.
2. System architecture and program description
The temperature and humidity real-time monitoring system for cold chain logistics is based on the characteristics of the existing cold chain logistics transportation by Shanghai Renwei Electronic Technology Co., Ltd., integrating GPS technology, temperature and humidity sensing technology,Radio Frequency IdentificationTechnology, electronic map technology, haul transmission and wireless transmission technology are developed. The system can realize the limited tracking management of refrigerated truck resources through the combination of logistics information and GPS technology, view the vehicle trajectory of the distribution record and monitor the temperature and humidity of the vehicle in real time Change, check the temperature and humidity change curve, when the upper and lower limits of temperature and humidity are exceeded, an early warning will be issued to ensure the safety of the product during transportation.
2.1 System architecture
System network architecture
2.2 Program description
The temperature and humidity label will be loaded on the container or the target item (box), and after the shipment has started, the temperature and humidity of the environment where the item is located will be continuously recorded. Generally, there are two application modes. One is to upload temperature and humidity curves at each intermediate site or destination at one time, and the logistics management platform integrates all uploaded data to monitor the quality of items in different links; the other is to set up on transport vehicles/ships GPRS real-time transmission equipment, logistics management platform can continuously monitor target items. The only difference between the two modes is that the latter mode, the real-time mode, can be used to rescue some valuables, and not just like the former mode can only identify whether the item is damaged. Of course, the active label identifies a certain packaging box (cabinet), and different packaging units in the same container can be monitored by installing multiple active labels.
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