Thermal Analysis Device Independent Sensor Heating
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Solution Overview
Problem
Current MEMS-based thermal analysis devices are not suitable for commercial use due to limitations in reproducibility, reliability, and user-friendliness, particularly in low temperature ranges where condensation and icing can occur, leading to artifacts and reduced sample throughput.
Innovation Solution
A thermal analysis device with a replaceable MEMS sensor featuring a sensor holder, electrical contact means, and independent heating and cooling elements that allow for quick and easy sensor replacement and temperature control, preventing condensation and icing, and ensuring high reproducibility and reliability of measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the device operates in low temperature range with cooling element, then thermal analysis capability is improved, but condensation and icing occur leading to measurement artifacts
Solution Approach 1:
The heating element is activated before the cooling element to pre-heat the sensor and surrounding components. This preliminary heating creates a thermal buffer that prevents condensation and icing during subsequent cooling operations, eliminating measurement artifacts before they can form.
Solution Approach 2:
The system performs a preliminary heating phase where the heating element raises the temperature of the sensor and contact elements above the dew point. This preparatory action ensures that when cooling begins, condensation cannot form on the sensor surfaces, maintaining measurement integrity in low temperature ranges.
2Adaptability or versatility
If sensor replacement is enabled for flexibility, then adaptability is improved, but device complexity and potential reliability issues increase
Solution Approach 1:
The device is divided into modular components: a replaceable sensor unit, a sensor holder, and a contact means. This segmentation allows the sensor to be independently replaced without affecting other system components, providing flexibility while maintaining simple, standardized interfaces that reduce overall system complexity.
Solution Approach 2:
The sensor holder and contact means are designed as universal components that can accommodate different sensor types and configurations. This multi-functional design allows a single holder structure to support various sensors, reducing the need for multiple specialized components and thereby simplifying the overall device architecture.
3Productivity
If standing time between measurements is reduced for high throughput, then productivity is improved, but condensation and icing risks increase
Solution Approach 1:
The heating element operates continuously or in extended cycles during the standing time between measurements, maintaining the sensor and contact elements above the dew point. This continuous heating action prevents condensation formation during idle periods, enabling rapid sample throughput without sacrificing measurement quality even during brief standing times.
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
The device achieves stable and reproducible measurement behavior, enables quick sensor exchange, and prevents icing, thereby improving the reliability and service life of the device while maintaining high sample throughput and reproducibility of results.
Implementation Method 1
The contact element is thermally connected to the heating element via the free end when the sensor is inserted and via the stop when the sensor is removed, and essentially so even when the sensor is removed can be heated or heated regardless of the operating state of the cooling element
Implementation Method 2
with a cooling element for cooling the thermal analysis device
Data Source
Figure 1
Figure 2~3
Figure 4~6
AI summary
A thermal analysis device has an interchangeable sensor which can be contacted via a contact element (23) of an electrical contact means, a heating element (14) and a cooling element (20), wherein the contact element (23) is thermally connected to the heating element (14) and can be heated when the sensor is removed essentially independently of the operating state of the cooling element (20).