Heart Sound Acquisition Device with Adjustable Biasing Force
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Solution Overview
Problem
Conventional devices for measuring heart sounds at home face difficulties in applying appropriate pressure, leading to unreliable measurement results, especially when used by non-medical professionals.
Innovation Solution
A heart sound acquisition device with a movable member and a biasing portion that adjusts pressure using an elastic or magnetic body, allowing for precise contact and reproducible measurements without expert knowledge, and a control unit that compares measurement waveforms to adjust pressure for optimal acquisition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional stethoscope with a fixed sensor is used for home heart sound measurement, then the device structure is simple, but the measurement precision and reproducibility deteriorate due to inability to apply appropriate pressure
Solution Approach 1:
The sensor is mounted on a movable member that can move in the pressing direction relative to the main body, allowing dynamic adjustment of pressing pressure. The biasing portion provides a restoring force that enables the movable member to maintain optimal contact pressure with the patient's body, improving measurement precision while keeping the adjustment mechanism simple.
Solution Approach 2:
The biasing portion changes the physical state by providing a controlled elastic or magnetic force that adjusts the pressing pressure parameter. This allows the device to adapt the contact pressure to optimal levels for heart sound acquisition, resolving the contradiction between measurement precision and device complexity.
2Reliability
If a fixed sensor position is used in conventional devices, then the device is easy to operate, but the reliability of measurement results deteriorates due to inconsistent contact pressure
Solution Approach 1:
The biasing portion enables the movable member to automatically adjust and maintain optimal pressing pressure through its own elastic or magnetic restoring force, without requiring the user to manually adjust pressure. This self-adjusting mechanism improves measurement reliability while maintaining ease of operation for non-medical professionals.
Solution Approach 2:
The control unit acquires heart sound data and determines acquisition states, providing feedback that guides the adjustment of pressing pressure. This feedback mechanism ensures reliable measurements by automatically optimizing contact pressure based on the quality of acquired heart sounds, making the device easy to use while ensuring measurement reliability.
3Measurement precision
If manual pressure adjustment is required for optimal heart sound acquisition, then measurement precision can be improved, but the ease of operation deteriorates requiring expert knowledge
Solution Approach 1:
The biasing portion with elastic or magnetic bodies provides automatic pressure adjustment through its restoring force, eliminating the need for manual pressure adjustment by users. The movable member self-regulates to maintain optimal contact pressure, achieving high measurement precision while remaining easy to operate without expert knowledge.
Solution Approach 2:
The control unit monitors heart sound acquisition quality and provides feedback to adjust pressing pressure automatically. This closed-loop feedback system ensures optimal measurement precision while removing the need for user expertise in pressure adjustment, improving ease of operation.
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 easy and reproducible acquisition of heart sounds with high accuracy, even by non-experts, by adjusting pressure to optimize the amplitude of the measurement waveform.
Implementation Method 1
the biasing portion includes at least one of an elastic body or a magnetic body
Implementation Method 2
the biasing portion includes at least one of an elastic body or a magnetic body
Data Source
AI summary
A heart sound acquisition device that includes a main body, a movable member, and a biasing portion. The movable member includes a first sensor that is brought into contact with a human body to acquire a heart sound. The biasing portion biases the movable member so that the first sensor presses the human body during acquisition of the heart sound. The movable member is movable with respect to the main body in a pressing direction in which the first sensor presses the human body, and the main body includes an adjustment portion that adjusts a biasing force of the biasing portion on the movable member.