Height-Adjustable Pulse Wave Sensor for Contact and Non-Contact Detection
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Solution Overview
Problem
Existing biological information detection methods face challenges in accurately measuring pulse waves without causing discomfort to the subject and in reducing measurement errors, particularly in invasive and non-invasive methods.
Innovation Solution
A biological information detection apparatus with a pulse wave measuring unit, height controller, and support member that can adjust its height to detect biological signals either in contact or non-contact with the subject's skin, using light emitters and receivers, and a method to determine signal quality and location for accurate data acquisition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a non-invasive pulse wave detection method is used, then subject comfort is improved, but measurement precision deteriorates
Solution Approach 1:
The pulse wave measuring unit is made height-adjustable rather than fixed, allowing dynamic adaptation between contact and non-contact measurement modes. This resolves the contradiction by enabling the system to switch between gentle non-contact mode (improving comfort) and contact mode (improving precision) based on measurement requirements.
Solution Approach 2:
The measurement parameters are changed by adjusting the height of the pulse wave measuring unit. By varying the distance between the sensor and skin surface, the system can optimize between comfort (larger distance) and precision (smaller distance), allowing both conflicting requirements to be satisfied under different operating conditions.
2Device complexity
If a fixed height pulse wave measuring unit is used, then device complexity is reduced, but adaptability deteriorates
Solution Approach 1:
The height controller provides dynamic height adjustment capability to the pulse wave measuring unit. This added dynamic element increases adaptability for different measurement scenarios while maintaining relatively simple device structure through automated control mechanisms.
Solution Approach 2:
The height-adjustable pulse wave measuring unit serves multiple functions: it can operate in both contact and non-contact modes, and can adapt to different skin surfaces and measurement requirements. This multi-functionality increases versatility without proportionally increasing device complexity.
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
Enables efficient and accurate detection of biological information such as pulse wave, blood vessel elasticity, blood flow velocity, and blood pressure with reduced measurement errors and subject discomfort, using both contact and non-contact methods.
Implementation Method 1
radiating light onto the subject from the biological information detection apparatus; receiving light reflected from the subject via the biological information detection apparatus
Data Source
AI summary
Provided are biological information detection apparatuses and methods of detecting biological information. The biological information detection apparatus includes a pulse wave measuring unit configured to detect a biological signal of a subject; a height controller configured to adjust a height of the pulse wave measuring unit; and a support member formed on a side of the height controller, wherein the pulse wave measuring unit is further configured to detect the biological signal while the pulse wave measuring unit is spaced apart from a surface skin of the subject by the adjusted height.