Reefer Sensor Mesh Network for Temperature and Airflow Control
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Solution Overview
Problem
Refrigerated tractor trailer units (reefers) experience frequent breakdowns due to inadequate monitoring and management of temperature and humidity levels during transit, leading to product spoilage, with drivers often failing to check cargo temperatures and maintain airflow, resulting in significant loss claims.
Innovation Solution
A mesh network of sensors is established within the reefer unit, comprising temperature, moisture, and airflow sensors connected via a wireless mesh network to a microcontroller, which communicates with a processing unit to monitor and adjust conditions in real-time, including data from RFID-tagged items to ensure optimal storage temperatures and airflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual temperature checking and monitoring is performed, then operational simplicity is maintained, but temperature control reliability deteriorates due to human error and lack of continuous monitoring
Solution Approach 1:
The system enables self-service through automatic sensor monitoring that continuously tracks temperature, humidity, and airflow without human intervention. The sensors autonomously detect conditions and trigger alerts when thresholds are exceeded, eliminating the need for manual checking while maintaining reliable temperature control throughout the reefer unit.
Solution Approach 2:
The patent implements feedback mechanisms where sensors continuously monitor environmental conditions and communicate data to the control system. When temperature, humidity, or airflow deviates from acceptable ranges, the system provides feedback through alerts and notifications, enabling timely corrective actions to maintain reliable temperature control.
2Loss of substance
If comprehensive sensor monitoring is implemented, then product spoilage loss is reduced, but system cost and complexity increase
Solution Approach 1:
The monitoring system is segmented into multiple independent sensor nodes distributed throughout the reefer unit. Each sensor package independently monitors local conditions (temperature, humidity, airflow) and communicates findings to the central system. This segmentation reduces overall system complexity by breaking down the monitoring function into manageable, modular components while comprehensively covering the entire cargo space to prevent product spoilage.
3Manufacturing precision
If real-time monitoring of all environmental parameters is performed, then quality control is improved, but energy consumption increases
Solution Approach 1:
The sensor system employs periodic monitoring rather than continuous high-frequency sampling. Sensors take measurements at predetermined intervals and only activate transmission when threshold violations occur. This periodic action maintains precise quality control by detecting environmental deviations while significantly reducing energy consumption compared to continuous real-time monitoring.
Data Source
AI summary
The present invention provides a system and apparatus for monitoring temperature and airflow from multiple sensors node for maintaining proper conditions within a refrigerated tractor-trailer unit or reefer. The system provides a mesh network of multiple sensors, which communicate between sensors and with a processing unit of a reefer unit for monitoring the condition of transported goods.