Reefer Tag Wireless Monitoring for Container Automation
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Solution Overview
Problem
Temperature-controlled containers face challenges in accurately monitoring and controlling temperature-sensitive environments during transportation, as existing systems lack efficient wireless monitoring and remote automation capabilities, leading to potential damage of perishable goods due to temperature fluctuations.
Innovation Solution
The implementation of a 'Reefer Tag' system that connects to Reefer Units via a serial device, allowing for wireless communication and data transmission to a host computer, enabling remote monitoring and control of temperature-controlled containers through an RFID Reader/Transmitter, with self-powered Reefer Tags capable of bidirectional communication and automatic baud rate detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If wireless monitoring and remote control systems are implemented in temperature-controlled containers, then real-time temperature monitoring and automation capability are improved, but device complexity and cost increase
Solution Approach 1:
The system is divided into separate functional modules: RFID tags for wireless identification, temperature sensors for environmental monitoring, controllers for data processing, and readers for data retrieval. This segmentation allows each component to be optimized independently and simplifies the overall system architecture while maintaining high automation capability.
Solution Approach 2:
The RFID tags serve multiple functions: they act as wireless identifiers, data carriers, and communication triggers. The readers can both read data from tags and write commands to control the Reefer units. This multi-functionality reduces the number of separate components needed, thereby reducing system complexity while enhancing automation.
2Adaptability or versatility
If multiple communication protocols and baud rates are supported for compatibility, then adaptability to different Reefer Units is improved, but device complexity increases
Solution Approach 1:
The system pre-configures a set of standard communication protocols and baud rates (1200, 2400, 4800, 9600, 19200) in the communication interface. The automatic baud rate detection mechanism is pre-programmed to test these predetermined rates in sequence, eliminating the need for manual configuration and reducing the complexity of handling multiple protocols by providing a standardized detection procedure.
Solution Approach 2:
The communication interface dynamically adjusts the baud rate parameter based on the detected Reefer Unit type. By automatically changing the communication parameter (baud rate) to match the target device, the system achieves adaptability without requiring complex manual intervention or multiple hardwired interfaces, thus managing complexity through parameter flexibility.
3Ease of operation
If automatic baud rate detection is implemented, then ease of connection to different Reefer Units is improved, but processing time and complexity increase
Solution Approach 1:
The baud rate detection process is pre-configured with a predetermined list of standard speeds (1200, 2400, 4800, 9600, 19200). The system tests these rates in a predetermined sequence rather than attempting all possible rates exhaustively, which significantly reduces detection time while maintaining ease of connection to various Reefer Units.
Solution Approach 2:
Instead of implementing a complete brute-force search through all possible baud rates (excessive action), the system uses a partial approach by testing only the most common and standard baud rates first. This partial action is sufficient for the vast majority of applications, reducing processing time while maintaining practical ease of operation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution provides efficient detection and troubleshooting of temperature-related issues, enabling full automation and control of temperature-controlled containers, ensuring the integrity of perishable goods by accurately monitoring and adjusting environmental conditions in real-time.
Implementation Method 1
The transponder is connected via a wireless interface of an antenna with a reader/transmitter
Data Source
AI summary
A system and method for monitoring data associated with a temperature controlled container with a Reefer Unit. The monitored data retrieved from the Reefer Unit is wirelessly transmitted to an evaluation unit via at least one transponder. The transponder is connected via a wireless interface of an antenna with a reader/transmitter. The wireless interface transmits the monitored data via a bus from the reader/transmitter to a converter which then transmits the converted monitored data via a communication interface to the evaluation unit. Aside from retrieving monitored data remotely, the system can also issue remote forward commands to provide full automation and control of such containers.