Vehicle Seat Vibration Device Frequency Mapping
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Solution Overview
Problem
Existing vibration generation devices for vehicle seats struggle to accurately vibrate specific positions, as they either compromise comfort or suffer from reduced vibration transmission efficiency when vibrators are placed between the cushion and seat surface or inside the cushion, respectively.
Innovation Solution
A vibration generation device comprising a vibration generator, a vibration transmission member inside the seat, and a frequency information recorder that allows for precise vibration frequency adjustment to target specific positions on the seat by associating frequency values with measurement positions, enabling the generation of vibrations that resonate at desired frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If vibrators are disposed between the cushion and surface of the seating portion, then the vibration transmission efficiency is improved, but the sitting comfort is impaired and the seated person may have a strange feeling of sitting
Solution Approach 1:
The invention divides the vibration transmission function into two separate components: (1) vibrators disposed between the cushion and seat surface for efficient vibration generation, and (2) a vibration transmission member extending from the vibrators to the seat surface for delivering vibrations to the seated person. This segmentation allows each component to perform its function optimally without compromising comfort or efficiency
Solution Approach 2:
The vibration transmission member acts as an intermediary element that bridges the gap between the vibrators (located between cushion and seat surface) and the seat surface where the seated person contacts. This intermediary structure transmits vibrations effectively while maintaining the comfortable cushion-seated person interface
2Object-affected harmful factors
If vibrators are installed inside the cushion, then the sitting comfort is improved, but the vibration transmission efficiency is reduced due to absorption by the cushion
Solution Approach 1:
The vibration transmission member serves as a dedicated transmission pathway that bypasses the cushion's absorbing effect. It extends from the vibrators through the cushion to the seat surface, ensuring vibrations are delivered efficiently despite the cushion's presence
Solution Approach 2:
The system separates the vibration generation function (vibrators between cushion and seat surface) from the vibration delivery function (transmission member to seat surface), allowing the vibrators to operate in a position optimized for efficiency while the transmission member penetrates the cushion to deliver vibrations to the seated person
3Reliability
If a vibration transmission member is disposed inside the seating portion to extend horizontally, then the vibration transmission efficiency is improved and comfort is maintained, but the ability to vibrate specific positions on the seat is limited
Solution Approach 1:
The invention makes the vibration transmission member positionable at different locations within the seating portion, allowing different segments of the member to be activated independently. This enables specific positions on the seat to be vibrated by selecting which portion of the transmission member receives vibrations from the vibrators
Solution Approach 2:
The system allows dynamic control of vibration positions by adjusting which vibrators are activated and where the vibration transmission member is positioned or oriented, enabling the seated person to experience vibrations at different locations on the seat
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
This solution enables precise vibration of desired positions on the seat, enhancing the vibration movement feeling for the seated person while maintaining comfort and improving vibration transmission efficiency.
Implementation Method 1
By changing or adjusting the frequency of vibrations to be transmitted by the vibration transmission member, these vibration generation devices are able to resonate the seating portion. By vibrating the vibration transmission member using the resonant frequency, which allows for the resonance of the seating portion, significant vibrations can be generated
Data Source
Figure 1
Figure 2(a)~2(b)
Figure 3
AI summary
A vibration generation device (200) includes a frequency information recorder (80) configured to record frequency values of inputted measurement signals such that the frequency values are associated with measurement positions of vibrations on the seat originally generated by the vibration generator (20) on the basis of the measurement signals and transmitted to the seat by the vibration transmission member and an output signal generator (70) configured to obtain a frequency value of a measurement position corresponding to a desired position from the frequency information recorder (80) and to generate an output signal having the frequency value.