Sensor-Equipped Seat Temperature Monitoring for Wakefulness Detection
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Solution Overview
Problem
Existing sensor-equipped seats lack the capability to detect multiple parameters and improve detection accuracy, with a demand for compact integration of sensors and controllers to determine changes in a seated occupant's physical condition, including wakefulness state.
Innovation Solution
A sensor-equipped seat with surface temperature, outside air temperature, and respiration sensors, along with a controller that calculates temperature differences and uses Bayesian filters to determine wakefulness, is designed for compact sensor and controller placement, enhancing detection accuracy and wakefulness determination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple sensors are added to detect various parameters, then the ability to determine physical condition changes is improved, but the device complexity increases
Solution Approach 1:
The patent combines multiple detection functions into a single integrated detection device that can measure both seat surface temperature and outside air temperature simultaneously. This merging approach allows the system to detect multiple parameters (temperature, respiration) without proportionally increasing device complexity, as the sensors are integrated into a unified structure rather than being separate components.
Solution Approach 2:
The detection device is designed with multi-functionality to detect various parameters including seat surface temperature, outside air temperature, and respiration. By making the detection device universal rather than specialized for a single parameter, the system achieves versatile physical condition monitoring without requiring separate dedicated sensors for each measurement type.
2Measurement precision
If detection accuracy is improved by using multiple parameters, then the determination of wakefulness state is improved, but the device complexity increases
Solution Approach 1:
The patent merges multiple detection functions into a single integrated detection device that can measure both seat surface temperature and outside air temperature simultaneously. This merging approach allows the system to detect multiple parameters (temperature, respiration) without proportionally increasing device complexity, as the sensors are integrated into a unified structure rather than being separate components.
Solution Approach 2:
The patent introduces a calculation unit that processes temperature data from multiple sensors to calculate temperature differences and rates of change. This intermediary computational layer enables the system to derive accurate wakefulness determination from multiple raw measurements without requiring direct complex sensor arrays, as the calculation unit acts as a mediator that transforms multiple simple measurements into precise diagnostic information.
3Productivity
If sensors and controller are integrated compactly, then the assembly efficiency is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The controller is integrated directly into the detection device, merging what would traditionally be separate components into a single unified unit. This integration eliminates the need for separate mounting and wiring of independent sensors and controllers, thereby improving assembly efficiency. The merged design reduces the number of assembly steps and connections required.
Solution Approach 2:
The detection device is designed with multi-functionality to detect various parameters including seat surface temperature, outside air temperature, and respiration. By making the detection device universal rather than specialized for a single parameter, the system achieves versatile physical condition monitoring without requiring separate dedicated sensors for each measurement type.
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 seat effectively detects multiple parameters to determine changes in physical condition and wakefulness state, improving detection accuracy and assembly efficiency with compact sensor integration.
Implementation Method 1
a surface temperature sensor that detects a seat surface temperature on a seated occupant side in a seat body
Implementation Method 2
a surface temperature sensor that detects a seat surface temperature on a seated occupant side in a seat body
Implementation Method 3
an outside air temperature sensor that detects a temperature outside the seat body
Data Source
AI summary
A sensor-equipped seat detecting various parameters and determining a change in physical condition of a seated occupant includes: a surface temperature sensor detecting a seat surface temperature on a seated occupant side and acquiring surface temperature data; an outside air temperature sensor detecting the seat body outside temperature and acquiring outside air temperature data; and a controller having a calculation unit calculating the degree of change in temperature difference from the surface temperature data and the outside air temperature data and a wakefulness determination unit determining a wakefulness state of the seated occupant based on the degree of change. The calculation unit calculates the degree of change in temperature difference from the seat surface temperature in the surface temperature data and the outside air temperature in the outside air temperature data, the degree of data. The wakefulness determination unit determines the wakefulness state of the seated occupant based on the degree of change.