Detachable Seat Sensor Holder for Stable Biometric Detection
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Solution Overview
Problem
Existing vehicle seat biological sensors are difficult to remove and replace, leading to a lack of versatility and instability in detecting biological signals due to adhesive fixation, which affects seating comfort and functionality.
Innovation Solution
A sensor unit with a biological sensor, communication unit, and sensor holder that can be easily attached and detached from various seats, using a wireless communication unit and battery-powered design, with a bag-shaped holder to prevent positional shift and ensure stable signal detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the biological sensor is fixed to the cushion pad with an adhesive or double-faced tape, then the sensor is securely attached to the seat, but the sensor cannot be easily removed or replaced
Solution Approach 1:
The sensor system is divided into separate components: a sensor unit that can be detached and a seat with an attachment portion. This segmentation allows the sensor to be securely attached during use while enabling easy removal and replacement when needed, resolving the contradiction between attachment stability and replaceability.
Solution Approach 2:
The attachment mechanism transitions from a static permanent bond (adhesive) to a dynamic reversible connection. The sensor unit can be attached to the seat when needed and detached when replacement is required, providing flexibility while maintaining security during operation.
2Measurement precision
If the biological sensor is fixed with adhesive to the cushion pad, then the sensor remains in position, but the sensor position shifts and biological signals cannot be stably detected
Solution Approach 1:
A sensor holder is introduced as an intermediary component between the biological sensor and the seat. The holder provides a stable attachment structure that prevents sensor displacement while maintaining proper contact with the occupant's body for accurate signal detection.
Solution Approach 2:
The sensor holder is designed with flexible material that can conform to the seat surface and maintain stable positioning. This flexible structure adapts to the contours of the seat while keeping the sensor in the correct position for reliable biological signal detection.
3Adaptability or versatility
If the sensor unit is detachably attached to the seat, then the sensor can be easily removed and replaced, but the attachment mechanism becomes more complex
Solution Approach 1:
The attachment mechanism is extracted from the sensor itself and placed on the seat as a separate component. This allows the sensor unit to remain simple while the seat provides the detachable attachment functionality, reducing overall system complexity despite enabling easy replacement.
Solution Approach 2:
The attachment portion on the seat is designed with universal characteristics that can accommodate different sensor units. This multi-functional design allows the same attachment mechanism to work with various sensor types, simplifying the overall system while maintaining versatility.
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 solution allows for easy attachment and detachment of the sensor unit to various seats, enhances signal stability, and improves seating comfort while maintaining a simple assembly configuration.
Implementation Method 1
a plurality of capacitive coupling type sheet-shaped sensors are disposed between a cushion pad forming a seat back and a trim cover, and the heartbeat of a seated occupant is measured based on the bioelectrical signal of the seated occupant detected from the sheet-shaped sensors
Implementation Method 2
a plurality of piezoelectric elements as body pressure distribution sensors are fixed inside each of a seat back and a seat cushion, and the pressure according to the seating posture of an occupant is converted into a voltage signal to detect the body pressure distribution of the occupant
Data Source
AI summary
To provide a sensor unit that can be easily attached to and detached from a seat in which a seated occupant is seated, and a seat equipped with a sensor unit. A sensor unit includes a sensor module including a biological sensor that detects a biological signal of a seated occupant, and a wireless communication unit that is connected to the biological sensor to wirelessly transmit the detected biological signal to an outside; and a sensor holder that holds the sensor module. The sensor holder includes a seat attachment portion detachably attached to an attached portion that is provided in a front surface of a seat cushion at a position at which the seated occupant is abuttable against the attached portion.