Vehicle Radar Sensor Heat Conductor Design
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Solution Overview
Problem
Radar sensors for vehicles face performance degradation due to high internal temperatures, which can exceed 170 degrees, caused by heat generated from the radar semiconductor, leading to reduced functionality.
Innovation Solution
The implementation of a radar sensor design that includes heat conductors, such as curable paste material-based first and second heat conductor members, strategically positioned between the measurement unit, shield case, and housing to effectively dissipate heat generated by the radar semiconductor, thereby reducing the internal temperature of the sensor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the radar semiconductor is used to generate electromagnetic waves for sensing, then the sensing function is achieved, but the internal temperature rises up to 170 degrees causing performance degradation
Solution Approach 1:
The harmful heat generated by the radar semiconductor is extracted and separated from the measurement unit through dedicated heat conductors. The heat conduction path is designed to lead heat away from the measurement unit through the shield case and housing to the external environment, effectively removing the thermal problem from the sensitive sensing components.
Solution Approach 2:
Heat conductors serve as intermediary elements between the measurement unit and the external environment. These heat conductors (including first and second heat conductor members) mediate the heat transfer process, conducting heat from the measurement unit through the shield case and housing without allowing the heat to accumulate in the measurement unit, thus protecting the sensing function while dissipating heat.
2Temperature
If heat conductors are added between the measurement unit and housing, then heat dissipation is improved, but the device complexity increases
Solution Approach 1:
The heat conduction function is merged with the existing structural components of the radar sensor. The shield case and housing serve dual purposes: providing structural protection and housing while simultaneously acting as heat conduction paths. The first and second heat conductor members are integrated into the assembly process, combining the heat dissipation function with the existing structural framework rather than adding completely separate cooling systems.
Solution Approach 2:
The shield case and housing are designed to perform multiple functions: they provide structural support and protection for the internal components while simultaneously serving as heat conduction pathways. This multi-functionality reduces the need for additional dedicated cooling structures, thereby limiting the increase in device complexity while achieving effective heat dissipation.
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 design effectively lowers the internal temperature of the radar sensor, preventing performance degradation and ensuring reliable operation by conducting heat away from the measurement unit to the housing and outside, thus maintaining sensor accuracy and functionality.
Implementation Method 1
one or more heat conductors disposed between the measurement unit and the shield case and between the shield case and the housing, and configured to conduct heat, generated by the measurement unit, from the shield case to the housing such that the heat is discharged to the outside of the housing
Data Source
AI summary
A radar sensor for a vehicle may include: a cover configured to transmit electromagnetic waves; a measurement unit disposed at a position facing the cover, and configured to generate the electromagnetic waves to sense an object; a housing having an internal space in which the measurement unit is disposed, and including an open entrance at which the cover is installed; a shield case coupled to the measurement unit, and configured to block the electromagnetic waves generated by the measurement unit such that the electromagnetic waves are discharged to the entrance; and one or more heat conductors disposed between the measurement unit and the shield case and between the shield case and the housing, and configured to conduct heat, generated by the measurement unit, from the shield case to the housing such that the heat is discharged to the outside of the housing.