Real-time Reefer Container Monitoring System based on IoT

Abstract

In this paper, we propose the reefer container monitoring system that not only monitors internal temperature, humidity of reefer container but also tracks the real-time location using GPS. It consists of a tag of information of situation using 433MHz RF transmitter(communication), GPS to track the real-time location and a device using WCDMA/GSM communication to transmit information to the server. We tested by applying the proposed system in reefer containers with yellow melons, melons transported from Korea to Singapore to track the location and check the temperature and the humidity. The result of this test is that there is a temperature difference around 1.7 degree depending on the position of inside of container and maintains the humidity stably about 97%. If we apply this proposed system to agricultural marketing, it is possible to get the time that fruits start to decay and minimize the loss of fruits by decaying during shipping.

Marine Cold Chain Transportation Monitoring and Route Scheduling Optimization Based on IoV-BDS

“…In the last few years, several technologies can realize ship-shore communications, including Automatic Identification System (AIS), mobile communication network (GPRS, WCDMA, 3G, and 4G), INMARSAT system, and BDS. AIS and mobile communication networks apply only to an inland river or offshore [13], [14]. INMARSAT system can carry out seamless communication in the world [15], [16], but its high communication cost brings great resistance to cost-saving seaborne transportation.…”

“…Formula (12) ensures that no refrigerator ship surpasses its load capacity. In addition, formula (13) indicates that the distribution center has m refrigerator ships, and each port is only for one refrigerator ship berthing. The time windows constraints are defined by formula ( 14) -( 16).…”

A Study on IoT-based Fleet Maintenance Management

“…Therefore, tag information cannot be read without an RFID reader or recognized when a metal material exists between a tag and a reader [26]. In contrast to the RFID technology, the IoT technology can obtain information in real-time through real-time network communication [9][10][11].…”

“…As this technology can solve a problem related to the limitations of radio-frequency identification (RFID), a communication module can be equipped to the IoT equipment to facilitate real-time network communication [9][10][11]. The application of the IoT technology can combine information and minimize the gap between the flow of distribution and information, thereby leading to effective supply chain management [12].…”

Fresh Agricultural Product Export Environment Analysis Using IP-RFID-based Reefer Container Monitoring Equipment

“…Despite this, however, this has not been made commercially available. [9][10] Table 1 summarized the characteristics and limitations of current methods to monitor reefer containers. [11][12] This system consists of the IP-RFID Tag attached to the cargo inside the reefer container, which senses the temperature, humidity, and impact around the cargo, and transmits them to the outside using 433MHz RF communication system.…”