Fan Air-Blowing Angle Control Using Radar and Sound Localization
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Solution Overview
Problem
Existing fans require manual adjustment of air-blowing angles due to insufficient human-body orientation perception, leading to inefficiency and user dissatisfaction, especially when multiple people are using the fan.
Innovation Solution
Integrate millimeter-wave radar and sound source localization technologies to enhance human-body orientation perception, allowing for automatic adjustment of air-blowing angles based on detected human-body orientations, with compensation error-correction mechanisms for multi-person scenarios and fine adjustments via voice commands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single sensor type (millimeter-wave radar) is used for human-body orientation perception, then the device complexity is reduced, but the measurement precision deteriorates due to detection errors in certain situations
Solution Approach 1:
The patent combines millimeter-wave radar and sound source localization sensors to form a hybrid perception system. The radar provides coarse positioning while the sound source localization provides fine adjustment, and their results are fused to achieve accurate human-body orientation detection that overcomes the limitations of using either sensor alone.
Solution Approach 2:
The patent makes the fan system multi-functional by integrating both radar detection and sound source localization capabilities. This allows the system to adapt to different detection scenarios and provides multiple pathways for determining human-body orientation, enhancing both accuracy and reliability.
2Ease of manufacture
If millimeter-wave radar is used for human-body detection, then the ease of manufacture is improved, but the measurement precision deteriorates due to wrong detection results in certain situations
Solution Approach 1:
The sound source localization acts as an intermediary that corrects and refines the detection results from the millimeter-wave radar. When the radar provides incorrect or imprecise orientation data, the sound source localization system serves as a mediator to provide corrective information for accurate air-blowing angle control.
Solution Approach 2:
The patent implements a feedback mechanism where the sound source localization unit receives angle-correction voice instructions and provides feedback to adjust the air-blowing angle. This closed-loop feedback system continuously refines the detection accuracy based on actual performance and user input.
3Ease of operation
If fixed oscillation angles are provided, then the ease of operation is improved, but the adaptability deteriorates when users change positions or multiple people use the fan
Solution Approach 1:
The patent transforms the fan from a static system with fixed oscillation angles to a dynamic system that automatically adjusts its air-blowing angle based on real-time detection of human-body orientation. The system continuously adapts to changing user positions and configurations without requiring manual intervention.
Solution Approach 2:
The fan system performs self-adjustment by automatically detecting human-body orientation and correcting its air-blowing angle without user intervention. The intelligent perception and control system serves itself by autonomously optimizing performance based on detected environmental conditions.
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 accuracy and automation of air-blowing angle control, ensuring that air is directed towards users effectively, enhancing user experience and reducing manual intervention.
Implementation Method 1
controlling, in response to a received single-person perception mode start instruction, the millimeter-wave radar unit to detect a single human-body target with a largest motion amplitude within a detection range thereof
Implementation Method 2
finely adjusting the air-blowing angle of the fan according to an angle-correction voice instruction received by the sound source localization unit
Data Source
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AI summary
The present application provides a method and an apparatus for controlling an air-blowing angle of a fan based on a human-body orientation, relating to the technical field of smart home appliances, and applied to a fan provided with a millimeter-wave radar unit and a sound source localization unit. On one hand, two modes of single-person perception and multi-person perception are designed, and a compensation error-correction mechanism is added for the multi-person perception mode, thereby solving the problem of detection result defect of the millimeter-wave radar unit while satisfying requirements of different scenario of the users; and on the other hand, the sound source localization technology is combined with the millimeter-wave radar detection technology, to achieve fine adjustment on the air-blowing angle of the fan and ensure accuracy of the air-blowing angle.