Inertial Measurement Device Thermal Isolation via Segmented Cases
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Solution Overview
Problem
Inertial measurement devices with built-in batteries face a reduction in detection capability due to sudden temperature rises from battery heat, causing thermal gradient issues and temperature correction errors.
Innovation Solution
The inertial measurement device features a battery and inertial sensor housed in separate cases, with the battery case made of low thermal conductivity material and positioned outside the sensor case, creating a heat insulation effect to prevent heat transfer and maintain sensor accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the battery and inertial sensor are arranged at corresponding positions on the opposite sides of a substrate in the internal space of the outer case, then the device achieves a compact integrated structure, but heat generated by the battery propagates to the impact sensor via the substrate causing sudden temperature rise and detection capability drop
Solution Approach 1:
The device is divided into two separate cases: a first case accommodating the inertial sensor and a second case accommodating the battery. This segmentation physically separates the heat-generating battery from the temperature-sensitive inertial sensor, preventing heat propagation while maintaining device functionality. The separate cases eliminate the thermal coupling that would occur if both components were integrated in a single case.
Solution Approach 2:
The battery is extracted from the sensor housing and placed in a separate second case. This extraction removes the heat source from proximity to the inertial sensor, eliminating the thermal interference problem. The battery case is fixed outside the sensor case, ensuring physical separation while maintaining electrical connection through cords.
2Ease of operation
If the battery is built in the outer case, then no electrical cords are needed for power supply and the device can be installed anywhere, but a thermal gradient is generated in the internal space causing temperature difference between temperature sensor and impact sensor leading to increased temperature correction error
Solution Approach 1:
The device structure is segmented into separate sensor case and battery case, allowing the battery to remain integrated (providing installation flexibility) while the inertial sensor is isolated in its own case. This segmentation prevents thermal gradient formation in the internal space while maintaining the cordless, portable nature of the device.
3Volume of moving object
If the battery and inertial sensor are in close proximity for compact design, then device size is reduced, but heat from the battery causes sudden temperature rise in the sensor reducing detection capability
Solution Approach 1:
The compact design is achieved through separate cases that are fixed together, maintaining a compact overall device size while preventing thermal interference. The first case containing the inertial sensor and the second case containing the battery are positioned adjacent to each other but thermally isolated, balancing compactness with heat protection.
Solution Approach 2:
The battery is extracted from the sensor case and placed in a separate second case, removing the heat source from direct contact with the inertial sensor. This extraction eliminates heat interference while maintaining compact device dimensions through external fixation of the battery case.
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 configuration effectively reduces temperature-related errors and maintains measurement accuracy, allowing the device to operate reliably during charging and after charging without significant temperature fluctuations.
Implementation Method 1
The second case is made of a material with low thermal conductivity and has a heat insulation effect
Data Source
AI summary
An inertial measurement device includes: an inertial sensor; a battery supplying electric power to the inertial sensor; a first case accommodating the inertial sensor; and a second case accommodating the battery. The battery and the first case are spaced apart from each other. The second case is fixed outside the first case.