Vehicle Sensor Thermal Management via Cabin Air Ducting
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Solution Overview
Problem
Autonomous vehicle sensors are affected by temperature variations, leading to operational inefficiencies and potential malfunctions due to inadequate temperature regulation.
Innovation Solution
A vehicle-mounted cooling system with a valve-controlled airflow duct that directs heated or cooled air from the passenger cabin to sensors on the exterior surface, optimizing temperature management based on sensor temperature thresholds and cabin conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cooling system is added to regulate sensor temperature, then sensor operational reliability is improved, but device complexity increases
Solution Approach 1:
The climate control system is designed to serve dual purposes: maintaining passenger cabin comfort and regulating sensor temperatures. The same HVAC system, ducts, and blowers that condition cabin air are also used to direct cooled or heated air to sensors mounted in the cabin, eliminating the need for separate sensor cooling equipment and reducing overall system complexity.
Solution Approach 2:
The system uses the vehicle's existing climate control infrastructure to automatically serve sensor temperature regulation needs. When sensors require temperature control, the climate control system redirects airflow through ducts to the sensors, allowing the system to self-regulate without requiring additional dedicated cooling mechanisms for the sensors.
2Temperature
If dedicated sensor cooling equipment is installed, then sensor temperature control is improved, but energy consumption increases
Solution Approach 1:
The climate control system performs dual functions of cabin conditioning and sensor temperature regulation using the same energy input. The HVAC system's compressor, blowers, and ducts are utilized for both passenger comfort and sensor protection, meaning the energy already expended for climate control provides dual benefits rather than requiring separate energy-consuming cooling equipment for sensors.
Solution Approach 2:
The system converts the energy already being consumed for climate control into a dual-purpose solution. By redirecting the airflow and cooled air that would otherwise only serve the cabin, the system transforms the existing energy expenditure into a beneficial dual-function system that also protects sensors without additional energy cost.
3Temperature
If airflow is directed to sensors from the climate control system, then sensor temperature regulation is improved, but cabin comfort may be compromised
Solution Approach 1:
The system dynamically adjusts airflow distribution based on real-time sensor temperature requirements. Control logic monitors sensor temperatures and modulates the climate control system's operation, directing airflow to sensors only when and where needed, while maintaining appropriate cabin conditions. This dynamic adjustment allows the system to balance sensor protection with passenger comfort rather than using a fixed airflow configuration.
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 solution effectively conserves energy by recycling waste cabin air to maintain optimal sensor temperatures, ensuring consistent sensor operation and reducing energy consumption.
Implementation Method 1
a duct receiving airflow from the passenger cabin, and a valve disposed in the duct and movable between a first position directing the airflow to the sensor
Implementation Method 2
directing the airflow to the sensor... effectively conserves energy by recycling waste cabin air to maintain optimal sensor temperatures
Data Source
AI summary
A vehicle includes an exterior surface, a sensor disposed on the exterior surface, a passenger cabin fixed relative to the exterior surface, a duct receiving airflow from the passenger cabin, and a valve disposed in the duct and movable between a first position directing the airflow to the sensor and a second position directing the airflow outside the vehicle.