Electromagnetic Vibration Actuator With Half-Wave Rectified Drive
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Solution Overview
Problem
Existing vibration apparatuses that convert sound into electrical signals for generating vibrations are complex and require a more straightforward configuration using an electromagnetic actuator driven in one direction.
Innovation Solution
A sensory vibration generation apparatus comprising an electromagnetic actuator that vibrates a movable member by driving it in one direction with an input driving signal, supported to elastically vibrate with respect to a fixing body, an alternating current signal input section, and a rectification section for half-wave rectification of the alternating current signal to produce the driving signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If an electromagnetic actuator driven in one direction is used to generate vibration, then the device complexity is reduced, but the vibration quality may be insufficient without proper signal processing
Solution Approach 1:
The rectification section performs half-wave rectification on the alternating current signal before it reaches the electromagnetic actuator. This preliminary signal processing prepares the driving signal in advance, ensuring the actuator receives appropriately processed input that maintains vibration quality while using a simple one-directional actuator design
Solution Approach 2:
The rectification section changes the parameter of the driving signal by performing half-wave rectification, converting the alternating current signal into a unidirectional signal suitable for the electromagnetic actuator. This parameter transformation enables the simple one-directional actuator to generate effective vibrations without requiring complex bidirectional control mechanisms
2Ease of manufacture
If a simple electromagnetic actuator configuration is used, then the ease of manufacture is improved, but the ability to generate suitable vibration corresponding to sound may be compromised
Solution Approach 1:
The rectification section processes the alternating current signal in advance by performing half-wave rectification, preparing the driving signal before it reaches the simple electromagnetic actuator. This preliminary action ensures that even the simple actuator configuration can accurately generate vibrations corresponding to the input sound
Solution Approach 2:
The rectification section acts as an intermediary between the alternating current signal input and the electromagnetic actuator. It transforms the signal format to match the actuator's requirements, enabling the simple actuator configuration to maintain adaptability for generating sound-corresponding vibrations
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
Enables the user to feel suitable vibrations corresponding to sound with a simpler configuration, achieving efficient vibration generation and transmission.
Implementation Method 1
an electromagnetic actuator configured to vibrate a movable member by driving the movable member in one direction of a vibration direction of the movable member with an input driving signal
Implementation Method 2
a rectification section configured to acquire the driving signal by performing half-wave rectification on the alternating current signal and output the driving signal to the electromagnetic actuator
Implementation Method 3
the movable member being supported to elastically vibrate with respect to a fixing body
Data Source
AI summary
A sensory vibration generation apparatus includes an electromagnetic actuator that includes: a plate-shaped base part on which an electromagnet consisting of a core and a coil is arranged, a movable body including a magnetic yoke disposed opposite the electromagnet with a gap and the movable body having a shape that allows a portion of the coil to be inserted at a position opposite to the coil, and an elastic body connected to each of the plate-shaped base part and the movable body so that the plate-shaped base part and the magnetic yoke are displaced relative to each other by energizing the electromagnet, wherein the electromagnetic actuator vibrates in one direction of a vibration direction with an input driving signal to the coil. The apparatus further includes a rectifier configured to acquire the driving signal by performing half-wave rectification on an alternating current signal.