Multispectral Sensor Device for Non-Contact Pulse Transit Time Measurement
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Solution Overview
Problem
Existing sensor devices require complex and costly apparatuses to measure blood pressure at multiple points, which is impractical for wearable devices and complicates the measurement of other health-related parameters.
Innovation Solution
A sensor device equipped with an image sensor that collects image data to determine pulse transit time measurements at sub-surface measurement locations within a measurement target, allowing for non-contact, multi-point blood pressure measurement and simultaneous determination of other health-related parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If complex and costly apparatuses are used to measure blood pressure at multiple points, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The image sensor is designed to perform multiple functions: capturing images for visual information, measuring blood pressure at multiple points through pulse transit time analysis, and potentially monitoring other health parameters. This multi-functionality eliminates the need for separate dedicated sensors for each measurement type, thereby reducing overall device complexity while maintaining measurement precision.
Solution Approach 2:
The patent replaces traditional mechanical or contact-based blood pressure measurement apparatuses with an optical image sensor system. By using image data and pulse transit time analysis instead of mechanical cuffs or invasive sensors, the system achieves accurate multi-point blood pressure measurement without the complexity of mechanical systems.
2Reliability
If contact-based measurement methods are used, then measurement reliability is improved, but ease of operation and safety deteriorate
Solution Approach 1:
The system replaces contact-based mechanical measurement methods with non-contact optical imaging. The image sensor captures blood flow information optically without physical contact, maintaining measurement reliability through pulse transit time analysis while significantly improving ease of operation and user comfort.
Solution Approach 2:
The patent introduces light as an intermediary medium to transfer information from the measurement target to the sensor. Instead of direct mechanical contact, light carries blood flow information from the target tissue to the image sensor, enabling non-contact measurement that is both reliable and convenient.
3Measurement precision
If multiple separate sensors are used for different health parameters, then measurement precision is improved, but device size and cost increase
Solution Approach 1:
The image sensor serves as a universal platform for measuring multiple health parameters including blood pressure at multiple points, blood flow characteristics, and potentially other physiological parameters. This single sensor replaces what would traditionally require multiple separate specialized sensors, reducing device size while maintaining measurement precision through advanced image processing and analysis algorithms.
Solution Approach 2:
The patent merges multiple measurement functions into a single image sensor system. By combining blood pressure measurement, blood flow monitoring, and other health parameter detection capabilities within one sensor platform, the system achieves compact size without sacrificing measurement precision across different health parameters.
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 approach reduces the size, cost, and complexity of the sensor device, enabling efficient measurement of blood pressure and other health parameters at multiple locations without the need for contact, thus improving versatility and safety.
Implementation Method 1
obtain, by a sensor device, from image data collected by a sensor of the sensor device, first image data regarding a first measurement location of a measurement target
Data Source
AI summary
Various aspects of the present disclosure generally relate to a multispectral sensor device. In some aspects, a sensor device may obtain, from image data collected by a sensor of the sensor device, first image data regarding a first measurement location of a measurement target, and may obtain, from the image data, second image data regarding a second measurement location of the measurement target, wherein the first measurement location and the second measurement location are sub-surface measurement locations within the measurement target. The sensor device may determine, based on the first image data and the second image data, a pulse transit time measurement, and provide information identifying the pulse transit time measurement. Numerous other aspects are provided.