Seat Notification Device Resonance Sweep Signal
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Solution Overview
Problem
Existing seat-based notification devices require high-power amplifiers to produce noticeable vibrations, leading to increased power consumption and costs, as the vibration component of low-frequency sounds decreases significantly on the seat surface.
Innovation Solution
A notification device that includes a speaker, a sweep signal generator, a vibration detector, and a sound measurement unit to detect resonant frequencies and generate resonance sweep signals, allowing for large vibrations with low signal levels and reduced amplifier output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high-level sound signals are output to ensure reliable vibration sensation, then vibration notification reliability is improved, but power consumption and amplifier cost increase
Solution Approach 1:
The patent utilizes resonance vibration of the seat at specific frequencies to amplify vibration sensation. By detecting the seat's resonant frequency and outputting sound signals at that frequency, the system achieves strong vibration notification with low signal levels, avoiding the need for high-power amplification.
Solution Approach 2:
The system dynamically changes the frequency parameter of sound signals to match the detected resonant frequency of the seat. This parameter adjustment allows the speaker to operate efficiently at frequencies that maximize vibration transmission to the user, reducing the required signal level and power consumption.
2Force
If high-power amplifiers are used to produce noticeable vibrations, then vibration intensity is improved, but device cost increases
Solution Approach 1:
The system exploits the natural resonance of the seat structure to generate strong vibrations without requiring high-power amplifiers. By tuning the sound frequency to match the seat's resonant frequency, the system achieves intense vibration sensation using low-power signal output, thereby reducing amplifier specifications and overall device cost.
Solution Approach 2:
The system uses the seat's own structural properties (its natural resonant frequency) to generate the desired vibration effect. Rather than requiring expensive high-power amplification equipment, the system lets the seat's inherent mechanical characteristics do the work of amplifying the vibration, reducing dependency on costly electronic components.
3Illumination intensity
If low-frequency sound signals are output, then deep bass realism is improved, but vibration component on seat surface decreases
Solution Approach 1:
The system changes the frequency parameter of sound signals from conventional low-frequency bass ranges to the specific resonant frequency of the seat (which may be in the low-frequency range but is optimized for vibration transmission). This parameter optimization ensures that the sound signals produce maximum vibration sensation on the seat surface while maintaining deep bass realism.
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 device generates resonant vibrations efficiently, reducing power consumption and costs while ensuring the user feels significant vibrations, even with low signal levels, by utilizing resonance sweep signals within the detected resonant frequency band.
Implementation Method 1
a sweep signal generator that generates a detection sweep signal capable of continuously changing a frequency of vibration that a speaker causes a user to feel, by changing a frequency of a predetermined wave at a constant speed in a frequency band in which the user can be caused to feel a signal in the form of vibration
Implementation Method 2
the sound measurement unit detects a frequency band indicating a signal level equal to or higher than a predetermined threshold as a sweep frequency band in frequency characteristics of the vibration detected by the vibration detector. The sweep signal generator generates a resonance sweep signal by changing the frequency of the predetermined wave at a constant speed in the sweep frequency band detected by the sound measurement unit, and the speaker generates vibration in the seat using the resonance sweep signal
Data Source
AI summary
Provided is a notification device and notification method that reduce the output and power consumption of an amplifier or the like and allow a user to sufficiently feel the presence or absence of notification through vibration. A notification device (1) includes a sweep signal generator (4) configured to generate a detection sweep signal by continuously changing the frequency in a frequency band in which a speaker (6) can cause a user to feel a signal in the form of vibration, a vibration detector (7) configured to detect vibration outputted from the speaker (6), and a sound measurement unit (8) configured to detect, as a sweep frequency band, a frequency band in which vibration indicates signal levels equal to or higher than a threshold. The sweep signal generator (4) generates a resonance sweep signal by changing the frequency in the sweep frequency band and causes the speaker (6) to generate vibration.