Bellow-Mounted Pulse Sensor Layout for Uniform Pressure Sensing
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Solution Overview
Problem
Existing pulse diagnosis devices face challenges in accurately measuring pulses due to non-uniform pressure distribution and sensitivity variations, particularly when using pressure sensors with pressurization elements, and are affected by individual anatomical differences in inch, bar, and cubit depths.
Innovation Solution
A pulse diagnosis device with a sensor positioned on a bellow, utilizing a positioning element to maintain uniform surface tension and accommodate individual anatomical variations, enhancing accuracy and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a sensor is fixed on a bladder by double-sided tape, then the device is easy to manufacture, but the flexibility of the bladder creates non-uniform surface tension on the sensor, causing abnormal pressure distribution
Solution Approach 1:
The patent uses a bellow (flexible shell) as the pressurization element instead of a traditional bladder. The bellow's structured flexibility allows it to expand and contract while maintaining uniform pressure distribution on the sensor, solving the problem of non-uniform surface tension caused by traditional bladders' excessive flexibility.
Solution Approach 2:
The patent changes the physical parameters of the pressurization element by transitioning from a soft bladder to a structured bellow with specific geometric features. This parameter change in the pressurization element's stiffness and structure allows it to maintain uniform pressure while still providing the necessary flexibility for pulse measurement.
2Extent of automation
If pressure sensors are used with pressurization elements to measure pulses, then the device can automatically measure pulses, but the degree of resolution at the detection point is not ideal due to different depths of inch, bar, and cubit and individual anatomical variations
Solution Approach 1:
The patent employs a bellow that can dynamically expand and contract to adapt to different anatomical depths of inch, bar, and cubit. This dynamic adjustment capability allows the pressurization element to maintain optimal contact pressure regardless of individual anatomical variations, thereby improving measurement precision while maintaining automation.
Solution Approach 2:
The bellow's structure provides different local properties at different regions, allowing it to adapt to the varying depths and slope changes at different pulse detection points (inch, bar, cubit). This local quality variation enables precise measurement across different anatomical locations.
3Measurement precision
If the sensing area of the sensor extends to the second end of the bellow, then the sensor can measure pulses more accurately, but the sensing area overlaps with the positioning element, causing interference
Solution Approach 1:
The patent positions the sensing area asymmetrically relative to the bellow structure, extending from the first end to at least partially beyond the second end, but strategically configured to avoid overlap with the positioning element. This asymmetric arrangement allows maximum sensing coverage while maintaining clear separation from the positioning structure.
Solution Approach 2:
The patent resolves the overlap issue by utilizing spatial dimensionality - the sensing area extends in one dimension along the bellow's length while the positioning element is positioned in a different spatial arrangement. This dimensional separation allows both components to coexist without interference, maximizing sensing accuracy while maintaining device simplicity.
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 achieves precise pulse measurements by minimizing the impact of anatomical differences and ensuring consistent pressure distribution, improving the accuracy and reliability of pulse diagnosis.
Implementation Method 1
The bellow has a sensing area, and the sensing surface has a first end and a second end opposite to each other... when the sensor is pressurized by the bladder, the surface tension of the sensor is not uniform
Data Source
AI summary
The present invention provides a pulse diagnosis device including at least one bellow, at least one sensor, and a locating element. The bellow has a sensing surface having a first end and a second end opposite to each other. The sensor is disposed on the sensing surface and has a sensing area at least partially extending from the first end to the second end or protruding from the second end. The locating element is at least partially disposed along the second end to position the sensor at the second end, wherein the sensing area does not overlap with the locating element at least partially.