Detection Unit Air Flow Protection Against Contamination
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Solution Overview
Problem
Autonomous processing machines, such as robotic lawn mowers and vacuum cleaners, face issues with operational soiling and fogging of detection units like cameras and optical sensors, leading to inaccurate environmental parameter detection and control.
Innovation Solution
Incorporating an air flow guiding device that directs air to prevent dirt and water particles from settling on detection units and heats the air flow to prevent fogging, using existing fan wheels or battery pack heating to maintain a clear and functional detection system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the detection unit is exposed during autonomous operation, then the machine can detect environmental parameters accurately, but the detection unit becomes contaminated with dirt and water particles
Solution Approach 1:
An air flow is introduced as an intermediary between the detection unit and the contaminated environment. The air flow acts as a protective barrier that prevents dirt and water particles from reaching the detection unit while allowing the unit to remain exposed and functional during autonomous operation
2Duration of action of moving object
If the detection unit operates in warm environments or during prolonged use, then the machine can maintain autonomous operation, but condensation and fogging occur on the detection unit
Solution Approach 1:
The temperature parameter of the air flow is changed to be warmer than the surrounding environment. This temperature difference prevents condensation and fogging on the detection unit by maintaining the unit's surface temperature above the dew point, allowing prolonged autonomous operation in warm environments
3Reliability
If a protective cover is added to the detection unit, then contamination and fogging are reduced, but the detection precision and reliability deteriorate
Solution Approach 1:
Instead of using a physical protective cover, pneumatic protection is implemented through a controlled air flow. The air flow dynamically protects the detection unit from contamination and fogging while maintaining optical transparency, thus preserving detection precision without sacrificing reliability
4Reliability
If additional protective devices are added to the processing machine, then the detection unit is better protected, but the device complexity increases
Solution Approach 1:
The air flow generation device is designed to serve multiple functions: it cools the detection unit, prevents contamination, and prevents fogging. By combining these protection functions into a single multi-functional system, the solution enhances detection reliability without proportionally increasing device complexity
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
Ensures reliable and precise detection of environmental parameters by preventing contamination and fogging, enhancing the stability and accuracy of navigation and processing control in autonomous machines.
Implementation Method 1
an air flow which can be supplied at least partially to the detection unit is generated
Implementation Method 2
which is designed at least to prevent dirt and/or water particles from adhering to the detection unit and/or to cool the detection unit at least in sections
Implementation Method 3
the supplied air flow is heated by the drive motor and/or the battery pack
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
In a processing machine (100) for autonomously processing an assigned work area (110), with a detection unit (120) for recording current environmental parameters that can be evaluated for controlling the processing machine (100) in the assigned work area (110), the detection unit (120) is assigned a clearance device (150) which is designed at least to reduce operational contamination and/or fogging of the detection unit (120) and/or condensation on the detection unit (120) during autonomous operation of the processing machine (100).