Cylindrical Sensor Window Nozzle Layout for Debris-Free Airflow
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Solution Overview
Problem
Sensor operation in vehicles is impaired by the formation of stagnation zones and debris accumulation on sensor windows, which can be caused by dirty or smudged lenses, leading to reduced performance and accuracy in detecting external environments.
Innovation Solution
A sensor apparatus with a cylindrical sensor window and air nozzles that direct airflow to prevent stagnation zones and debris from reaching the sensor, utilizing a pressurized chamber and adjustable airflow based on vehicle speed to maintain optimal sensor clarity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If air nozzles are added to direct airflow across the sensor window, then debris accumulation is prevented, but device complexity increases
Solution Approach 1:
The patent applies pneumatic principles by introducing air nozzles that direct airflow across the sensor window surface. This airflow creates a protective barrier that prevents debris accumulation while maintaining sensor operation. The pneumatic system is integrated into the sensor housing, providing continuous cleaning without mechanical contact.
Solution Approach 2:
The patent uses airflow as an intermediary medium between the external environment and the sensor window. The air stream acts as a protective barrier that intercepts debris particles before they can contact the sensor surface, effectively mediating the interaction between contaminants and the sensitive component.
2Object-affected harmful factors
If airflow is continuously directed across the sensor window, then stagnation zones are removed, but energy consumption increases
Solution Approach 1:
The patent implements dynamic control of the airflow system by adjusting the air nozzle operation based on vehicle speed and environmental conditions. At higher speeds, natural airflow may suffice, reducing or eliminating the need for active air nozzle operation. The system adapts its energy consumption to actual cleaning requirements rather than operating continuously at full power.
Solution Approach 2:
The air nozzles can operate in periodic cycles rather than continuously, providing bursts of airflow to clear stagnation zones and debris accumulation. This periodic operation maintains sensor cleanliness while significantly reducing average energy consumption compared to continuous airflow.
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
The solution effectively removes stagnation zones and prevents debris from contacting the sensor window, ensuring continuous and accurate sensor operation by maintaining a clean airflow across the sensor window, even at varying vehicle speeds.
Implementation Method 1
an air nozzle positioned at one end of the sensor window and shaped to direct airflow in a direction parallel to the axis across the sensor window
Data Source
AI summary
A sensor apparatus includes a cylindrical sensor window defining an axis and an air nozzle positioned at one end of the sensor window and shaped to direct airflow in a direction parallel to the axis across the sensor window. The air nozzle extends circumferentially relative to the axis around the sensor window. The nozzle is formed of an inner edge and an outer edge each extending circumferentially relative to the axis around the sensor window. The inner edge is circular with a radius at least as great as an outer radius of the sensor window. The outer edge includes a first portion with a semicircular shape with a radius smaller than the outer radius of the sensor window and a second portion that extends circumferentially relative to the axis around the sensor window from the first portion to the first portion at a constant radial distance from the inner edge.