Wearable Blower Motor Control Using Tap-Based Acceleration Sensing
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Solution Overview
Problem
Conventional blowers attached to clothing require separate portable power supplies with multiple switches, necessitating manual operation for power and air volume adjustments, which is inconvenient.
Innovation Solution
A blower system integrated with a motor, impeller, and sensors that allow for wireless charging and control via acceleration detection, enabling hands-free operation and adjustment of rotation speed and airflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a portable power supply with multiple switches is externally connected to the blower, then power supply and air volume control functions are provided, but operation convenience deteriorates due to the need to manually operate switches after removing the power supply
Solution Approach 1:
The patent integrates the power supply unit directly into the blower housing, merging previously separate components (blower and external power supply) into a single integrated device. This eliminates the need for external cable connections and manual switch operations, as the power supply is now inherently part of the blower structure.
Solution Approach 2:
The blower is equipped with an acceleration sensor that automatically detects user intent through tapping gestures and autonomously controls power supply and rotation speed without requiring manual switch operations. The system serves itself by interpreting physical interactions (taps) and automatically adjusting operational parameters.
2Productivity
If manual switch operation is required for power and air volume control, then precise control is achieved, but operation time increases due to multiple switching steps
Solution Approach 1:
The patent replaces the mechanical switch-operating system with an acceleration sensor-based detection system. Instead of manually operating physical switches, users simply tap the blower housing, and the acceleration sensor translates this mechanical gesture into electronic control signals, dramatically reducing operation time.
Solution Approach 2:
The control system automatically responds to acceleration sensor detections by autonomously adjusting power supply and rotation speed. The system performs the control function itself without requiring the user to manually operate switches, thereby eliminating the time loss associated with multiple switching steps.
3Ease of operation
If an acceleration sensor is integrated into the housing, then hands-free operation is enabled through gesture detection, but device complexity increases due to additional sensor integration
Solution Approach 1:
The acceleration sensor serves as an intermediary between user intent and system control. Instead of directly operating switches or buttons, users interact with the housing by tapping, and the acceleration sensor mediates this interaction by converting physical taps into electronic control signals that the controller can process.
Solution Approach 2:
The acceleration sensor provides multiple functions: it detects both power supply control intent and rotation speed adjustment intent through different tapping patterns. This single sensor component handles multiple control functions that previously required separate switches and controls, reducing overall system complexity despite adding the sensor itself.
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
Facilitates convenient, hands-free operation and adjustment of airflow without the need for external power supply manipulation, improving waterproof and dustproof properties, and enhancing waterproof properties, and enhancing waterproof properties, and enhancing durability.
Implementation Method 1
an acceleration sensor that detects acceleration applied to the housing
Implementation Method 2
a stator that drives the rotor
Data Source
AI summary
A motor includes a rotor, a stator, a housing, an acceleration sensor, and controller. The rotor is rotatable about a central axis extending in an axial direction. The stator is operable to drive the rotor. The housing accommodates the rotor and the stator. The acceleration sensor is operable to detect acceleration applied to the housing. The controller is configured or programmed to control energization to the stator. Based on a detection result of the acceleration sensor, the controller is configured or programmed to perform a rotation speed change of any of a rotation start of the rotor, at least one of an increase and a decrease of a rotation speed, and a rotation stop.