Phase-Change Temperature Indicator Using Magnetic Particle Shift
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Solution Overview
Problem
Existing systems fail to provide precise monitoring of temperature exposure and spikes in temperature-controlled environments, leading to potential degradation of sensitive products without warning signs.
Innovation Solution
Incorporation of phase change materials and magnetic particles within containers, where the particles move upon temperature change, allowing detection through magnetic, electrical, or optical means, enabling precise temperature monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional temperature monitoring systems are used, then the system structure is simple, but the measurement precision is insufficient and cannot detect temperature spikes effectively
Solution Approach 1:
The patent utilizes phase change materials (PCM) that undergo phase transition at specific temperature thresholds. When the temperature reaches the threshold, the PCM changes phase (e.g., from solid to liquid), causing magnetic particles suspended in the PCM to change their magnetic properties or physical state, which can be detected by sensors. This enables precise temperature spike detection without requiring complex electronic temperature sensing systems.
Solution Approach 2:
The patent introduces phase change materials as an intermediary substance between the temperature field and the detection system. The PCM translates temperature changes into detectable signals through its phase transition properties, allowing simple sensors to detect temperature spikes indirectly through the behavior of magnetic particles in the PCM, thereby achieving high measurement precision without complex direct temperature sensing.
2Reliability
If continuous temperature monitoring is implemented, then the reliability of temperature control is improved, but the loss of energy increases
Solution Approach 1:
The patent employs periodic or threshold-based detection rather than continuous monitoring. The phase change materials are designed to trigger detection only when specific temperature thresholds are reached, creating a periodic activation pattern. This allows the system to maintain reliability by detecting temperature spikes when they occur, while significantly reducing energy consumption by keeping the detection system inactive during normal temperature conditions.
Solution Approach 2:
The phase change materials automatically respond to temperature changes through their inherent phase transition properties, eliminating the need for continuous external energy input to maintain monitoring capability. The PCM self-activates the detection mechanism when temperature thresholds are crossed, providing reliable temperature monitoring without requiring continuous energy consumption for active sensing.
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
Enables accurate detection of temperature exposure and spikes, ensuring the integrity of temperature-sensitive products by providing real-time monitoring and alerting mechanisms.
Implementation Method 1
In one embodiment, the container includes a phase change material. The phase change material may transition from a solid state to a fluid state in response to the temperature reaching a threshold temperature.
Implementation Method 2
The particles may be magnetic particles. The change in location of the particles may be detected magnetically, electrically, or optically.
Data Source
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AI summary
Aspects of the present disclosure include using particles in phase change materials to track temperature change of an object. The particles may be initially disposed at specific locations within the phase change materials. As the phase change materials transition from the solid state to the fluid state, the particles may move from the initial locations to different locations. The change in locations of the particles may be detected magnetically, electrically, optically, and/or visually. Such change may indicate that the object experienced a temperate above at least one phase transition temperature of the phase change materials.