Single Ankle Sensor for Exercise State Reproduction
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Solution Overview
Problem
Existing exercise monitoring systems require multiple motion sensors attached to various body parts, making them complex and costly, which hinders their usability for ordinary individuals.
Innovation Solution
A system with a sensor unit attached to one ankle that outputs motion data, allowing for precise exercise state determination and reproduction using a simple configuration, including a sensor unit, a display unit, and a control unit that processes calibration and exercise data to generate pseudo-motion images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple motion sensors are attached to various body parts to accurately determine exercise state, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent extracts the essential measurement function to a single ankle-mounted sensor unit, removing the need for multiple sensors on different body parts. The sensor unit captures acceleration and angular velocity data from the ankle, which is then processed to derive comprehensive exercise state information including lower limb motion, upper body posture, and exercise intensity, thereby simplifying the system while maintaining measurement accuracy
Solution Approach 2:
The patent introduces an information processing device as an intermediary that receives data from the single sensor unit and performs complex calculations to determine exercise state. This intermediary processes acceleration and angular velocity data to derive lower limb motion parameters, upper body posture, and exercise intensity, effectively decoupling the simplicity of single-sensor attachment from the complexity of comprehensive exercise analysis
2Measurement precision
If multiple motion sensors are attached to various body parts to accurately determine exercise state, then measurement precision is improved, but ease of operation deteriorates
Solution Approach 1:
The patent extracts the measurement function to a single wearable sensor unit attached to the ankle, eliminating the need for users to attach multiple sensors to different body parts. This single attachment point dramatically simplifies the setup process while the information processing device handles the complex data analysis to maintain measurement precision
Solution Approach 2:
The sensor unit is designed as a self-contained wearable device that automatically captures motion data during exercise. The system performs self-calibration and the information processing device automatically processes the data to determine exercise state without requiring user intervention or complex configuration, making the system easy to operate
3Measurement precision
If multiple motion sensors are used to measure acceleration and angular velocity, then measurement precision is improved, but cost increases
Solution Approach 1:
The patent extracts the measurement function to a single sensor unit containing both acceleration and angular velocity sensors, eliminating the need for multiple separate sensors. This single integrated unit captures all necessary motion data from the ankle, reducing the quantity of sensors from multiple body-part-specific sensors to one universal sensor
Solution Approach 2:
The patent merges multiple measurement functions (acceleration sensing and angular velocity sensing) into a single integrated sensor unit attached to the ankle. This combination allows one sensor unit to perform the work of multiple separate sensors, reducing overall system cost while maintaining comprehensive motion capture capability
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 accurate and user-friendly exercise state monitoring by simplifying the sensor configuration and reducing costs, allowing users to easily determine and improve their exercise performance.
Implementation Method 1
a sensor unit which is attached to an ankle of one leg of a human body and outputs data on a motion state of the one leg
Implementation Method 2
measuring acceleration or angular velocity
Data Source
AI summary
Provided is an exercise information display system including a sensor unit attached to an ankle of one leg of a human body to output data on a motion state of the leg and a control unit processing the data. The control unit acquires a parameter based on data output from the sensor unit in a case where the human body performs a calibration motion for acquiring the parameter expressing at least one of an attachment orientation and an attachment position in the one leg of the sensor unit and a posture of the one leg in standing on the one leg, generates a reproduction image where a motion state of the leg during the exercise is reproduced in pseudo manner based on data output from the sensor unit in a case where the human body performs exercise of moving the leg and the parameter, and displays an image including at least the reproduction image as exercise information on the display unit.