Vehicle Seat Respiration Sensor Edge Placement
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Solution Overview
Problem
Existing vehicle seat sensors struggle to accurately measure respiration signals due to the contradictory properties of load resistance and detection accuracy, making it difficult to detect pressure changes under the buttocks with high precision.
Innovation Solution
The vehicle seat incorporates sensors placed along the edge of the contact portion between the seat cushion and the buttocks, transmitting pressure signals to an arithmetic operation device for accurate respiration measurement, with multiple sensors arranged to accommodate various physical differences and reduce pressure load on the sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a sensor is placed under the buttocks to detect pressure changes for respiration measurement, then detection accuracy improves, but load resistance performance deteriorates
Solution Approach 1:
The sensor is extracted from the high-load area (under the buttocks) and relocated to the edge of the contact portion where load is significantly reduced. This extraction resolves the contradiction by maintaining detection accuracy for respiration signals while avoiding the excessive load that would compromise sensor durability and performance.
Solution Approach 2:
The patent applies local quality by placing the sensor at a specific location (edge of contact portion) where the load characteristics are different from the center area. This localized placement optimizes both detection accuracy for respiration and load resistance by exploiting the natural pressure distribution gradient in the seating area.
2Strength
If a sensor is placed at the edge of the contact portion to reduce load, then load resistance improves, but detection accuracy deteriorates
Solution Approach 1:
The patent transitions from a single-point sensor placement (under buttocks) to a linear arrangement along the edge of the contact portion. This dimensional change allows the sensor to span multiple measurement points, capturing respiration-induced pressure variations while benefiting from reduced load at the edge location.
Solution Approach 2:
The sensor is segmented into multiple detection elements arranged along the edge of the contact portion. This segmentation allows the system to maintain high detection accuracy by distributing measurement points across the edge area, while each segment experiences reduced load compared to centralized placement.
3Adaptability or versatility
If multiple sensors are provided to accommodate physical differences among seated persons, then adaptability improves, but device complexity increases
Solution Approach 1:
The linear sensor arrangement along the edge of the contact portion serves multiple functions: it detects respiration signals, adapts to different body sizes and shapes, and provides redundancy for accurate measurement. This universal design resolves the contradiction by making the sensor system adaptable to various seated persons without requiring complex customization.
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 configuration expands the sensor's applicable range and ensures highly accurate and stable respiration signal detection, reducing the risk of inaccurate readings and extending sensor lifespan by minimizing pressure applied to the sensors.
Implementation Method 1
a sensor provided in a seat cushion and detects a pressure signal from a load applied from a seated person
Data Source
AI summary
A respiration signal of a seated person is detected with high accuracy by using a vehicle seat that includes a seat cushion; and a sensor detecting a pressure signal from a load applied from a seated person. The sensor is provided to be along an edge of a contact portion between the seat cushion and buttocks of the seated person. The sensor transmits the detected pressure signal to an arithmetic operation device of the seated person. In a respiration measuring device, the arithmetic operation device computes the detected pressure signal detected by the sensor to obtain a respiration signal of the seated person.