Voice Coil Haptic Vibration Control for Sustained Receptor Stimulation
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Solution Overview
Problem
Conventional vibration motors, such as Eccentric Rotating Mass (ERM), fail to maintain stimulation over time due to lack of frequency change, leading to reduced haptic receptor adaptability and often require excessive vibration force for stronger stimulation.
Innovation Solution
A vibration device with a voice coil type actuator and control unit that outputs a control signal with a frequency band having a peak frequency that changes over time, allowing for continuous vibration stimulation by alternating between frequencies effective for Meissner and Pacinian corpuscles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional vibration motor (ERM) with fixed frequency is used, then the device structure is simple and cost is low, but haptic receptor adaptability occurs and stimulation cannot be maintained over time
Solution Approach 1:
The patent applies dynamics by transitioning from a fixed-frequency vibration motor to a controllable actuator system that dynamically adjusts vibration frequency over time. The control unit varies the frequency according to a predetermined pattern, making the vibration characteristics changeable rather than static, thereby preventing receptor adaptability while maintaining system manageability.
Solution Approach 2:
The patent implements parameter changes by modifying the vibration frequency parameter over time. The control unit changes the frequency parameter according to a predetermined pattern, causing the actuator to operate at different frequencies at different times. This temporal variation in the frequency parameter prevents haptic receptor adaptability while avoiding the need for complex mechanical structures.
2Force
If a motor with excessive vibration force is mounted for stronger stimulation, then stimulation intensity is improved, but the device becomes more complex and energy consumption increases
Solution Approach 1:
The patent applies periodic action by implementing time-varying vibration frequency according to a predetermined pattern. Instead of using excessive force continuously, the system periodically varies the frequency to maintain effective stimulation across different receptor types. This temporal modulation achieves strong overall stimulation效果 without requiring an oversized motor, thereby reducing device complexity and energy consumption.
Solution Approach 2:
The patent uses dynamics to adjust vibration characteristics in real-time rather than relying on a fixed high-force motor. The control unit dynamically modifies the vibration parameters, allowing the same actuator to deliver appropriately intense stimulation at different moments, avoiding the need for excessive motor specifications.
3Adaptability or versatility
If a single frequency is used for vibration, then the actuator design is simple, but it cannot effectively stimulate different types of haptic receptors over time
Solution Approach 1:
The patent implements parameter changes by varying the vibration frequency parameter over time according to a predetermined pattern. This causes the actuator to stimulate different types of haptic receptors at different frequencies, expanding receptor stimulation coverage without requiring multiple actuators or complex mechanical systems.
Solution Approach 2:
The patent applies dynamics by transitioning from static single-frequency operation to dynamic multi-frequency operation. The control unit enables the actuator to adapt its frequency output over time, matching the characteristics of different haptic receptors sequentially, thereby achieving broad receptor coverage with a single actuator system.
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 enables continuous and stronger vibration stimulation by effectively stimulating different human body receptors with a wide frequency range, improving low-frequency reproduction capability and responsiveness.
Implementation Method 1
an electromagnetic drive unit (3) that drives the movable element (4) to vibrate
Implementation Method 2
both end portions in the direction of the vibration axis O are supported by a first damper (60a) and a second damper (60b)
Data Source
AI summary
A vibration device includes a voice coil type actuator that applies vibration to a human body, and a control unit that outputs a control signal to the voice coil type actuator, the control signal being a signal which includes a waveform having a frequency band so as to vibrate the voice coil type actuator according to the control signal and having a peak frequency in the frequency band changing with time.