Physiological Recording Device Synchronous COG and Contact Range Detection
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Solution Overview
Problem
Existing balance boards and pressure sensing pads are inadequate for comprehensive balance assessment due to limitations in accuracy, cost, and complexity, as they rely solely on center of gravity offset detection and require high-resolution pressure sensing elements and ADCs, which increase costs and labor burdens, and fail to accurately measure balance ability when users stand with feet close together or in dynamic movements.
Innovation Solution
A physiological information recording device with a carrier board equipped with force transducers and contact sensing elements, coupled with a processing unit that synchronously analyzes outputs to determine center of gravity and contacted range, enabling accurate balance assessment and automatic identification, judgment, and recording of user posture and weight distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If two balance board splicing methods are used to improve measurement accuracy and pertinence, then the precision of left and right foot detection is improved, but the cost increases and signal processing time synchronization problems occur
Solution Approach 1:
The patent merges the detection functions of two separate balance boards into a single integrated balance board with multiple force transducers. Instead of using two independent boards that require splicing and synchronization, the invention combines all detection elements into one unified device that simultaneously captures data from both feet, eliminating synchronization issues and reducing overall system complexity.
Solution Approach 2:
The single balance board is designed with multi-functional capability to detect parameters from both left and right feet simultaneously. The force transducers are strategically positioned to capture weight distribution, center of gravity, and contact area information for both feet on one platform, making the device universal for comprehensive balance assessment without requiring multiple separate units.
2Loss of information
If a large number of pressure sensing elements are used to detect pressure values at each point, then the detection coverage and data collection capability are improved, but the cost and labor burden for calibration increase significantly
Solution Approach 1:
The invention extracts only the essential detection points needed for balance assessment rather than using a dense grid of pressure sensing elements across the entire surface. By selecting specific strategic locations for force transducers, the system obtains sufficient information about weight distribution and center of gravity without requiring comprehensive coverage of every point, thereby reducing the number of elements needed and simplifying calibration.
Solution Approach 2:
The patent employs fewer, lower-cost force transducers compared to a dense array of high-precision pressure sensing elements. While individual transducers may have limited measurement points, their strategic placement and lower cost allow for easier replacement and calibration without significant labor burden, making the overall system more economical and maintainable.
3Measurement precision
If high resolution ADCs are used to process messages from pressure sensing elements, then the measurement precision and accuracy are improved, but the device complexity and cost increase
Solution Approach 1:
Instead of using high-resolution ADCs for all detection points, the invention applies partial action by using fewer force transducers with moderate resolution that are strategically positioned at critical locations. This approach provides sufficient measurement precision for balance assessment without the excessive complexity and cost of high-resolution processing for every possible measurement point.
4Device complexity
If force transducers are disposed at four corners to detect center of gravity offset, then the device complexity is reduced, but the measurement accuracy is insufficient for comprehensive balance assessment
Solution Approach 1:
The patent applies local quality by positioning force transducers at specific strategic locations on the balance board rather than uniformly distributing them or placing them only at corners. The transducers are located at positions that optimize their ability to detect weight distribution patterns, center of gravity shifts, and contact area changes, with each transducer placed where it provides maximum informational value for balance assessment.
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 provides a cost-effective, accurate, and comprehensive balance assessment by synchronously recording center of gravity and contacted range, improving balance evaluation and reducing operational costs, while allowing for automatic identification and recommendation services, suitable for both entertainment and medical rehabilitation applications.
Implementation Method 1
a carrier board 1 provided with a plurality of force transducers 111
Implementation Method 2
a plurality of contact sensing elements 2 disposed on the surface of the carrier board 1
Data Source
AI summary
A device for recording physiological information includes a carrier board comprising a plurality of force transducers and a plurality of contact sensing elements; and a processing unit, coupled to the force transducers and the contact sensing elements, configured to determine a center of gravity (COG) according to outputs of the force transducers, configured to determine a contacted range according to outputs of the plurality of contact sensing elements, configured to record the center of gravity and the contacted range, wherein the gravity and the contacted range substantially correspond to the same time point.