Recessed Seat Sensor Layout for Comfort and Load Isolation
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Solution Overview
Problem
Traditional sensor disposition in seats, where sensors are placed between the cushion pad and the outer cover, can lead to discomfort for passengers as they feel the sensor against their buttocks and thighs, affecting sitting comfort.
Innovation Solution
A sensor disposition structure in a seat that includes a board-like member with a concave on its upper surface, where the sensor is placed, and an attachment bracket is used to fix the sensor, allowing it to be easily installed and reducing the impact of passenger load, while being positioned under the cushion pad to avoid direct contact with the passenger.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the sensor is disposed between the cushion pad and the outer cover, then the sensor can be easily installed and integrated into the seat structure, but the passenger feels the sensor against their buttocks and thighs, reducing sitting comfort
Solution Approach 1:
The sensor is relocated from a two-dimensional position directly under the outer cover to a three-dimensional recessed position within the cushion pad structure. This dimensional change allows the sensor to be embedded deeper, moving it away from direct contact with the passenger while maintaining its detection function through the cushion pad material.
Solution Approach 2:
The sensor is nested within the cushion pad structure, specifically positioned in a recessed area or cavity formed in the cushion pad. This nesting approach allows the sensor to be housed within the existing cushion pad volume, eliminating the need for separate mounting structures while ensuring the passenger does not directly feel the sensor.
2Measurement precision
If the sensor is disposed directly under the outer cover, then the sensor detection function is maximized with direct contact, but the passenger experiences unpleasant sensation and reduced comfort
Solution Approach 1:
The cushion pad material serves as an intermediary medium between the sensor and the passenger. The sensor detects passenger presence through the cushion pad material, which transmits the detection signal while simultaneously cushioning and isolating the sensor from direct passenger contact, thus maintaining both detection accuracy and comfort.
3Object-affected harmful factors
If the sensor is embedded in the cushion pad, then passenger comfort is improved by eliminating direct contact, but the sensor may be affected by cushion pad deformation under load
Solution Approach 1:
The cushion pad is designed with a specific recessed structure or cavity at the sensor location, creating a localized area with different mechanical properties. This local quality change allows the sensor to be positioned in a way that minimizes the impact of general cushion pad deformation, as the recessed structure provides a more stable reference frame for sensor detection.
Data Source
AI summary
A sensor disposition structure in a seat includes a cushion pad and a board-like member which is disposed under the cushion pad. A concave is formed in an upper surface of the board-like member, and a sensor is disposed in the concave.