Pressure Measuring Shell With Height Sensing for Blood Pressure Accuracy
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Solution Overview
Problem
Existing pressure measuring devices struggle to accurately determine physiological parameters like blood pressure due to the influence of hydrostatic pressure and height variations, leading to inaccuracies in measurements.
Innovation Solution
A pressure measuring device with a shell that includes a pressure sensing area, a pressure application element, and a height sensor attached to the shell, allowing for the consideration of both pressure and height measurements to improve accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pressure measurement is performed without considering height variations, then the measurement process is simple, but measurement precision deteriorates due to hydrostatic pressure influence
Solution Approach 1:
The patent replaces complex mechanical height adjustment mechanisms with a magnetic field-based height sensor system. The magnetic field sensor detects height variations through magnetic flux changes, eliminating the need for mechanical measurement devices while improving measurement precision and reducing device complexity.
Solution Approach 2:
The patent introduces a magnetic field as an intermediary between the pressure measurement system and height detection. The magnetic field serves as a mediator that translates height variations into detectable signals without requiring direct mechanical contact or complex measurement mechanisms.
2Measurement precision
If height sensor is integrated into the shell, then measurement precision improves, but device complexity increases
Solution Approach 1:
The patent combines the height sensor integration with the existing shell structure, merging two separate functions (pressure measurement and height detection) into a unified device. This integration improves measurement precision while minimizing the increase in device complexity through functional consolidation.
Solution Approach 2:
The shell structure is designed to serve multiple functions: it provides structural support, houses the pressure sensing device, and integrates the height sensor. This multi-functionality approach allows the same component to perform multiple roles, reducing overall device complexity while maintaining high measurement precision.
3Measurement precision
If pressure sensing device is located in the pressure sensing area of the shell, then measurement precision improves, but ease of manufacture deteriorates
Solution Approach 1:
The patent divides the pressure sensing system into distinct modular components: the shell with integrated height sensor, the pressure sensing device, and the pressure application element. This segmentation allows for independent manufacturing and testing of each module, improving measurement precision while facilitating easier assembly through standardized interfaces.
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 integration of a height sensor with the pressure measuring device enhances the accuracy of determining physiological parameters by accounting for hydrostatic pressure and height variations, resulting in improved measurement precision.
Implementation Method 1
The measured pressure signal and hence also a physiological parameter like the blood pressure, which might be determined based on the measured pressure signal, is influenced by the hydrostatic pressure and therefore by the height of the pressure measuring device.
Data Source
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AI summary
The invention relates to a pressure measuring device configured to surround a subject's body part. It comprises a pressure application element configured to apply pressure to the body part, a pressure sensing device configured to measure a pressure signal of the subject and a shell 4 which is arranged to be located between the pressure application element and the body part. The inner surface of the shell comprises a pressure sensing area in which at least a part 61 of the pressure sensing device is located. The pressure measuring device also comprises a height sensor 105 attached to the shell. By using this kind of pressure measuring device, a physiological parameter like the blood pressure can be determined with a very high accuracy.