3D Printed Temperature Sensors Using Sintered Metal-Polymer Matrices
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Solution Overview
Problem
Conventional temperature sensors using discrete thermistors are complex and costly, with surface-mounted sensors compromising structural integrity and requiring additional manufacturing steps, while internal temperature measurement is challenging without damaging the object.
Innovation Solution
3D printing technology integrates thermally sensitive resistors directly into objects using a matrix of sintered elemental transition metal particles interlocked with fused thermoplastic polymer particles, allowing for internal temperature measurement without weakening the object and reducing manufacturing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If surface-mounted temperature sensors are used, then temperature measurement is enabled, but structural integrity is compromised and manufacturing complexity increases
Solution Approach 1:
The temperature sensor is merged with the object itself by integrating the thermally sensitive resistor directly into the object's material structure during 3D printing. This eliminates the need for separate surface-mounted sensors and their associated mounting hardware, thereby maintaining structural integrity while enabling temperature measurement.
Solution Approach 2:
The object material itself is given multiple functions: it serves both as the structural material and as the temperature sensing medium. By incorporating thermally sensitive resistor material into the 3D printing process, the object becomes self-sensing, eliminating the need for separate sensing components.
2Measurement precision
If discrete thermistors are used, then temperature measurement is enabled, but device complexity and manufacturing cost increase
Solution Approach 1:
The temperature sensing function is merged into the object's manufacturing process itself. The thermally sensitive resistor is printed directly as part of the object structure, eliminating separate assembly steps for attaching discrete thermistors and reducing overall device complexity.
Solution Approach 2:
The object becomes self-sensing through the integration of thermally sensitive material during its own manufacturing process. The object serves its own temperature measurement needs without requiring external sensing components or additional assembly operations.
3Measurement precision
If internal temperature measurement is attempted, then internal temperature data is obtained, but object integrity is compromised
Solution Approach 1:
The object material is designed to perform multiple functions simultaneously: providing structural integrity and enabling temperature measurement at any location within the object. The thermally sensitive resistor can be positioned anywhere in the object during printing without requiring post-manufacturing modifications.
Solution Approach 2:
The temperature sensing capability is built into the object during its initial manufacturing process rather than being added later. The thermally sensitive resistor is printed in the desired internal location as part of the object's construction, eliminating the need for subsequent drilling or modification that would compromise integrity.
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 approach simplifies the manufacturing process, enhances reliability, and enables precise internal temperature measurement without compromising the structural integrity of the object, offering cost and performance advantages over traditional sensor systems.
Implementation Method 1
Certain types of temperature sensors can measure temperatures based on changes in electrical resistance of a material. Depending on the material, a thermistor can have a positive or negative temperature coefficient.
Implementation Method 2
The resistor can include a matrix of sintered elemental transition metal particles interlocked with a matrix of fused thermoplastic polymer particles
Data Source
AI summary
A temperature sensor can include a resistor, a first electrical contact at a first end of the resistor, a second electrical contact at a second end of the resistor, and a resistance measuring device. The resistor can be formed of a matrix of sintered elemental transition metal particles interlocked with a matrix of fused thermoplastic polymer particles. The resistance measuring device can be connected to the first electrical contact and the second electrical contact to measure a resistance of the resistor.