Vehicle Interior Temperature Sensor Segmentation and Thermal Isolation
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Solution Overview
Problem
Existing non-suction type interior temperature sensors for vehicles have low operational reliability and high manufacturing costs, limiting their design flexibility and accuracy in measuring vehicle interior temperatures.
Innovation Solution
A non-suction type interior temperature sensor design featuring a sensor casing with separate upper and lower temperature sensing elements, a compensation temperature sensing element, and a microcomputer to determine interior temperature by averaging or correcting for solar radiation and other heat sources, using a blocking member to prevent convective heat transfer between elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a non-suction type interior temperature sensor is used, then the manufacturing cost is reduced and design flexibility is improved, but the operational reliability of temperature measurement deteriorates
Solution Approach 1:
The sensor is divided into multiple independent sensing elements (upper temperature sensing element, lower temperature sensing element, and compensation temperature sensing element) positioned at different locations. Each element measures temperature independently, and the microcomputer processes these separate measurements to calculate the interior temperature, improving reliability without requiring a suction structure
Solution Approach 2:
A blocking member is introduced as an intermediary component to prevent convective heat transfer between the upper and lower sensing elements. This blocking member, made of insulative material, acts as a thermal barrier that isolates the sensing elements from each other while allowing both to remain in the non-suction configuration, thereby maintaining measurement accuracy and reliability
2Shape
If a non-suction type interior temperature sensor is used, then the appearance design freedom is improved, but the operational reliability of measuring temperature deteriorates
Solution Approach 1:
The sensor casing is designed without a grill structure, allowing free appearance design. Inside, multiple temperature sensing elements are segmented and positioned at different locations (upper, lower, and compensation elements outside the casing). This segmentation enables the sensor to function reliably without requiring air suction openings, thus maintaining design freedom while improving measurement reliability
Solution Approach 2:
The compensation temperature sensing element is positioned outside the sensor casing in a different spatial dimension, while the upper and lower elements are positioned inside at different vertical levels. This multi-dimensional arrangement allows the sensor to gather temperature data from multiple locations without requiring front-facing grill openings, maintaining aesthetic design while improving measurement accuracy
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
Improves the operational reliability of interior temperature measurement while maintaining low manufacturing costs and allowing for flexible design, providing accurate temperature readings by accounting for solar radiation and other heat sources.
Implementation Method 1
an upper temperature sensing element provided on an upper surface of the substrate at a position inside the sensor casing, a lower temperature sensing element provided on a lower surface of the substrate at a position inside the sensor casing, and a compensation temperature sensing element provided on the substrate to be placed outside the sensor casing
Implementation Method 2
a blocking member sealing an inside of the sensor casing where the upper temperature sensing element and the lower temperature sensing element are provided, thereby allowing the upper temperature sensing element, the lower temperature sensing element, and the compensation temperature sensing element to be independent from each other in a convective heat transfer
Data Source
AI summary
The present disclosure relates to an interior temperature sensor for a vehicle. The sensor includes a sensor casing disposed to expose a sensing surface to a space that is the subject of temperature measurement, a substrate extending in a direction from an inside of the sensing surface toward an outside while at least a part of the substrate bisects an inside of the sensor casing into upper and lower sections, an upper temperature sensing element provided on an upper surface of the substrate at a position inside the sensor casing, a lower temperature sensing element provided on a lower surface of the substrate at a position inside the sensor casing, and a compensation temperature sensing element provided on the substrate to be placed outside the sensor casing. Furthermore, a microcomputer determines an interior temperature of the vehicle based on the measured values.