Body Composition Analyzer With Image-Guided Posture Stabilization
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Solution Overview
Problem
Conventional body composition analysis systems using bioelectrical impedance analysis face inaccuracies due to subject movement and posture changes during measurements, particularly when standing and using handrails, leading to inconsistent and inaccurate results.
Innovation Solution
A body composition analysis system with image scanning and adjustable handrails and telescopic rods to maintain proper posture, preventing movement and ensuring accurate measurements by using image data to adjust electrode positions and calculate body composition data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the measured person stands on a rotary plate for rotary scanning, then the body composition analysis can be performed, but the measured person will inevitably swing or change posture, affecting measurement accuracy
Solution Approach 1:
The system performs image scanning before impedance measurement to capture the subject's body shape and posture. This preliminary action allows the system to plan electrode positions and measurement parameters in advance, ensuring accurate measurements even when the subject is standing on a rotary plate that may cause slight movements during the measurement process.
Solution Approach 2:
The system continuously monitors the subject's posture through image scanning and uses this feedback information to adjust electrode positions and measurement parameters in real-time. This feedback mechanism ensures that measurements remain accurate despite posture changes or swinging that may occur during the measurement process.
2Ease of operation
If the measured person contacts the electrodes by both hands with small included angles, then the measurement can be completed, but skin contact or clothing interference occurs, affecting measurement repeatability
Solution Approach 1:
The system dynamically adjusts the included angle between the arms and trunk based on image scanning data. Rather than requiring a fixed angle, the system adapts the electrode contact geometry to optimize measurement conditions, ensuring reliable and repeatable measurements while maintaining ease of operation.
Solution Approach 2:
The system changes the geometric parameters of electrode contact, specifically the included angle between arms and trunk, based on image scanning results. This parameter adjustment ensures optimal skin contact and eliminates clothing interference, thereby improving measurement repeatability while keeping the operation simple.
3Measurement precision
If the measured person maintains a certain included angle between arm and trunk, then measurement accuracy improves, but the measured person is liable to swing or change posture
Solution Approach 1:
The system replaces the mechanical requirement of maintaining a fixed included angle with an image-based detection and adjustment system. Instead of relying on the subject to mechanically maintain a specific posture, the system uses image scanning to detect actual posture and adjusts measurement parameters accordingly, eliminating the conflict between accuracy requirements and posture stability.
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 system improves measurement accuracy and repeatability by stabilizing the subject's posture and adjusting electrode positions based on body shape, providing more reliable body composition data.
Implementation Method 1
an image capturing device; The calculating unit receives resistance and reactance measured by the two first electrode sets and the two second electrode sets and receives image data obtained by the image capturing device
Implementation Method 2
the four limbs of the measured person contact electrodes of the body composition measuring instrument, and very low current is passed therethrough. By the characteristic that the difference of the water content and cell membrane properties of different tissues in the body results in different resistance and reactance for current of different frequencies, the body water content is obtained
Data Source
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AI summary
A body composition analysis system (10, 10') having image scanning function includes an image capturing device (20), a body composition analyzer (30) having a stand platform (31) with two first electrode sets (313), two handrails (33) and a calculating unit (35) electrically connected with the image capturing device (20), and a control panel (40). Each handrail (33) has a telescopic rod (331) and a handle (333) having a second electrode set (335). An end of each telescopic rod (331) is pivotably attached to the stand platform (31). Each handle (333) is disposed at another end of each telescopic rod (331). The calculating unit (35) includes a body shape module database (351) and a calculational logic (353), receives resistance and reactance measured by the first and second electrode sets (335) and image data obtained by the image capturing device (20), and after comparing the image data with the body shape module database (351), calculates by the calculational logic (353) to obtain a body composition data to be shown on the control panel (40).