Container Condition Monitoring Using Light-Based Door Detection
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Solution Overview
Problem
The challenge lies in accurately monitoring and documenting the environmental conditions within refrigerated shipping containers to determine the freshness and condition of goods during storage and transport, as existing methods fail to distinguish between temperature changes due to refrigeration malfunctions and container openings, leading to unclear accountability and potential losses for shipping companies.
Innovation Solution
The implementation of an environmental condition monitoring system that includes a light sensor to differentiate between temperature changes caused by refrigeration issues and container openings, combined with temperature measurements, and uses wireless communication to transmit data through existing networks, allowing for real-time monitoring and historical data logging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If environmental condition monitoring is implemented, then measurement precision of temperature and light levels is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple sensing functions (temperature sensing and light level sensing) into a single integrated monitoring device. The control module coordinates both sensors and consolidates data output, reducing the need for separate monitoring systems and simplifying overall device complexity while maintaining measurement precision.
Solution Approach 2:
The monitoring device is designed to perform multiple functions: temperature measurement, light level measurement, data storage, and communication. This multi-functional approach eliminates the need for separate dedicated devices for each measurement type, thereby improving measurement precision without proportionally increasing device complexity.
2Measurement precision
If light sensor is added to differentiate container opening from refrigeration malfunction, then measurement precision of environmental conditions is improved, but device complexity increases
Solution Approach 1:
The light sensor is integrated with the temperature sensor and control module into a unified monitoring system. The control module processes signals from both sensors and correlates light level changes with temperature changes to distinguish between container openings and refrigeration malfunctions, achieving improved measurement precision without significantly increasing device complexity.
Solution Approach 2:
The control module acts as an intermediary that processes and correlates data from multiple sensors. It analyzes the relationship between light level changes and temperature changes to determine the cause of environmental variations, thereby improving measurement precision while keeping the overall system complexity manageable through intelligent data processing.
3Loss of information
If wireless communication module is implemented, then loss of information is reduced, but use of energy increases
Solution Approach 1:
The wireless communication module transmits stored environmental condition data periodically rather than continuously. The device accumulates data in memory and sends batches of information at scheduled intervals, which reduces the frequency of wireless transmissions and thereby lowers energy consumption while still ensuring that information is communicated reliably.
Solution Approach 2:
The monitoring device autonomously manages its own communication schedule and data transmission without requiring external control. It automatically determines when to transmit data based on stored information and energy availability, optimizing the balance between information transmission and energy consumption independently.
4Reliability
If environmental condition data is recorded and transmitted, then reliability of shipping company claims is improved, but loss of time for data management increases
Solution Approach 1:
The device continuously records environmental condition data in memory during the shipping process, so that when verification is needed, the data is already collected and organized. This preliminary data collection eliminates the need for time-consuming data gathering at the point of verification, thereby improving reliability of claims while minimizing time loss during dispute resolution.
Solution Approach 2:
The monitoring device creates a digital copy of the environmental condition history that can be transmitted to shipping companies and customers for verification. This digital record serves as reliable evidence of shipping conditions without requiring physical inspection or time-consuming verification procedures, thus improving reliability while reducing time loss.
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 accurate and timely data on container conditions, enabling shipping companies to verify the freshness of goods, manage shelf life, and reduce disputes by distinguishing between refrigeration issues and container openings, thus enhancing customer satisfaction and operational efficiency.
Implementation Method 1
an environmental condition sensor, a rewriteable memory to store environmental condition data from the environmental condition sensor
Implementation Method 2
A light sensor may be useful to determine if an enclosed area, for example a shipping container, has been opened
Data Source
AI summary
In an embodiment, the invention is directed to a device including an environmental condition sensor, a light sensor; and a control module. The control module associates a light intensity above a defined threshold with an open-door status of a container. In another embodiment, a device includes an environmental condition sensor, a rewriteable memory that stores environmental condition data from the environmental condition sensor, and a wireless communication module that transmits stored environmental condition data. Embodiments of the invention may be useful to provide techniques for monitoring environmental conditions within a container, such as a refrigerated trailer.