Vehicle Seat Sensor Lever Guides Finger for Vital Sign Measurement
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Solution Overview
Problem
Existing vital sign measurement technologies face challenges in accurately measuring biological information after a collision, particularly when non-contact methods fail due to frame-out or extraneous material interference, and contact sensors struggle with precision through clothing or difficulty in obtaining measurements from injured or panicked occupants.
Innovation Solution
A vital sign measurement device with sensors positioned at a vehicle seat, featuring levers that protrude after a collision to guide the occupant's fingers into measurement openings, ensuring easy and precise measurement of vital signs like SpO2 and pulse rate, even in weakened states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If non-contact measurement methods are used, then measurement can be performed without physical contact, but measurement accuracy deteriorates due to frame-out or extraneous material interference
Solution Approach 1:
The patent introduces an intermediary mechanism (lever) that guides the occupant's finger to the sensor, mediating between non-contact convenience and contact precision. The lever acts as a mediator that naturally directs the finger into the sensor opening without requiring active user cooperation, thus maintaining ease of operation while ensuring measurement precision through physical contact.
2Ease of operation
If contact sensors are positioned on the seat surface, then measurement can be obtained through clothing, but measurement precision deteriorates due to difficulty in obtaining measurements from injured or panicked occupants
Solution Approach 1:
The sensor system performs self-service by automatically guiding the finger to the measurement position through the lever mechanism. The lever naturally directs the occupant's finger into the sensor opening without requiring the occupant to actively cooperate or locate the sensor, enabling measurement even when the occupant is injured, panicked, or unconscious.
Solution Approach 2:
The lever is pre-positioned and designed to naturally guide the finger to the correct location before measurement begins. This preliminary arrangement of the guiding structure ensures that when the occupant's arm moves naturally after collision, the finger will be directed to the sensor opening, eliminating the need for active user participation during the measurement process.
3Ease of operation
If sensors are positioned to accommodate natural arm positioning after collision, then ease of measurement improves, but device complexity increases due to lever mechanisms
Solution Approach 1:
The lever mechanism serves itself by utilizing the natural movement and positioning of the occupant's arm after collision. Rather than requiring complex active control systems to position sensors or guide users, the lever passively self-adjusts to guide the finger to the sensor based on the occupant's natural arm positioning, reducing the need for additional complex control mechanisms.
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 enables easy and accurate measurement of vital signs after a collision by positioning sensors and levers to accommodate the occupant's natural arm positioning, ensuring effective measurement regardless of posture or body size variations.
Implementation Method 1
a photoelectric pulse-wave sensor that measures a pulse wave of an occupant by using light
Data Source
AI summary
A vital sign measurement device includes at least one sensor that is provided at a seat, and that is configured to contact a finger of a measurement subject and to measure a vital sign of the measurement subject. The seat includes a seat surface portion on which a femoral region and buttocks of the measurement subject are to be placed and a seat back capable of being disposed along a back of the measurement subject. The at least one sensor includes a side-portion sensor that is disposed below a side edge of the seat surface portion.