Air Blower Multi-Sensor Detection for Extended Human Recognition Range
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Solution Overview
Problem
Conventional air blowers cannot detect humans outside their sensor range or in blind spots within a room due to furniture, leading to ineffective air distribution.
Innovation Solution
An air blower system with a first sensor for detecting humans within a specific range and a second sensor-mounted device that transmits its detection results to the air blower, allowing the air blower to adjust air direction, amount, speed, temperature, humidity, and purification levels based on both sensors' data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a single sensor is used in the air blower, then the device complexity is reduced, but the human detection range is limited and blind spots occur
Solution Approach 1:
The air blower system divides the detection task into multiple segments by using a first sensor for near-range detection and a second sensor (in sensor-mounted device) for far-range detection. This segmentation allows each sensor to operate in its optimal detection zone, collectively covering the entire room space without requiring one complex sensor system.
Solution Approach 2:
The system extends detection coverage by adding a spatial dimension - placing the second sensor in a sensor-mounted device that can be positioned at different locations (e.g., on walls or ceilings) rather than only within the air blower unit. This dimensional expansion eliminates blind spots caused by furniture and structural obstacles.
2Reliability
If the air blower only uses its built-in sensor, then the system is simple to operate, but it cannot detect humans outside its detection range or in blind spots
Solution Approach 1:
The sensor-mounted device autonomously performs detection in areas beyond the air blower's range and transmits data automatically. The system self-manages the multi-sensor integration without requiring user intervention for calibration or coordination, maintaining ease of operation while improving detection reliability.
Solution Approach 2:
The second sensor provides feedback about human presence in extended detection zones to the air blower's controller. This feedback loop enables the system to adjust air blowing operations based on comprehensive detection data from both sensors, improving reliability without complicating user interaction.
3Area of stationary object
If multiple sensors are integrated to expand detection range, then the detection coverage is improved, but the device complexity increases
Solution Approach 1:
The sensor-mounted device serves multiple functions: it acts as both a detection station for extended range monitoring and a communication node that transmits data to the air blower. This multi-functionality reduces the need for additional dedicated components, managing complexity while expanding detection coverage.
Solution Approach 2:
The system uses an intermediary communication mechanism (transmitter-receiver pair) to bridge the air blower and the sensor-mounted device. This standardized intermediary interface simplifies the integration of multiple sensors by providing a uniform data exchange protocol, reducing the complexity that would otherwise arise from direct multi-sensor wiring and coordination.
Data Source
AI summary
An air blowing device and an air blowing system reduces a region where a person cannot be recognized in a space provided with the air blower, and achieves control of the air blower in view of a person in a larger range in the space. The air blower includes: a first sensor configured to detect a position of a human in a first human detection range; a receiver configured to receive a detection result of a second sensor transmitted from a transmitter of a sensor-mounted device, the sensor-mounted device including the second sensor configured to detect a position of a human in a second human detection range; and a controller configured to perform air blowing control when the first sensor does not detect a human in the first human detection range and the second sensor detects a human in the second human detection range.