Vehicle Seat Back Fatigue Relief Under Lateral Acceleration
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Solution Overview
Problem
Existing vehicle seats with fatigue reduction features cause discomfort due to instability in the driver's upper body during excessive lateral acceleration, as the body-motion promoting means interfere with the natural pressing action, leading to an uncomfortable sitting experience.
Innovation Solution
A vehicle seat system equipped with a lateral acceleration sensor and an acceleration-distinction control circuit that stops the body-motion promoting means during excessive lateral acceleration, ensuring the driver's stability by maintaining the means in a drivable state within predetermined acceleration ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the body-motion promoting means repeatedly presses the occupant to promote blood circulation, then fatigue reduction is achieved, but upper body stability deteriorates during excessive lateral acceleration
Solution Approach 1:
The body-motion promoting means transitions from a static pressing mechanism to a dynamic controlled system that adjusts its operation based on detected lateral acceleration conditions, switching between active pressing and stopped states to maintain stability while preserving fatigue reduction benefits
Solution Approach 2:
The lateral acceleration sensor provides real-time feedback to the control circuit, which monitors acceleration levels and automatically adjusts the body-motion promoting means operation accordingly, creating a closed-loop control system that prevents upper body instability during excessive lateral acceleration
2Reliability
If the body-motion promoting means operates continuously to promote blood circulation, then fatigue relief is improved, but comfort deteriorates during excessive lateral acceleration
Solution Approach 1:
The system dynamically adjusts its operational state based on real-time lateral acceleration detection, transitioning between active and inactive states to maintain comfort while preserving blood circulation promotion during normal conditions
Solution Approach 2:
The control circuit receives continuous feedback from the lateral acceleration sensor and automatically modulates the body-motion promoting means operation to prevent discomfort during excessive lateral acceleration while maintaining fatigue relief benefits during normal driving
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 system effectively prevents upper body instability and discomfort by controlling the body-motion promoting means in response to lateral acceleration, maintaining a stable sitting experience during vehicle travel.
Implementation Method 1
a lateral acceleration sensor provided in the interior of the seat back for detecting accelerations that are applied in right and left lateral directions relative to a vehicle
Data Source
AI summary
There is disclosed a vehicle seat provided with a system for facilitating relieving of fatigue of an occupant on the vehicle seat, the vehicle seat including a seat back, the system comprising an occupant's body-motion promoting means 6 provided in an interior of the seat back 1 for repeatedly locally pressing the occupant on the vehicle seat, to thereby promote blood circulation of the occupant, a lateral acceleration sensor 8 provided in the interior of the seat back 1 for detecting accelerations that are applied in right and left lateral directions relative to a vehicle, and an acceleration-distinction control circuit provided in the interior of the seat back 1 for causing the body-motion promoting means 6 to be maintained in a drivable state according when an acceleration detected by the lateral acceleration sensor 8 is in a predetermined value range, for causing drive of the body-motion promoting means to be once stopped when the lateral acceleration becomes an excessive value exceeding an upper limit of the predetermined value range during the drive of the body-motion promoting means, and for returning the body-motion promoting means to the drivable state when the lateral acceleration drops toward the predetermined value range from the excessive value.