Gait Measurement Activation Using Magnetic Field Foot Sensing
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Solution Overview
Problem
Existing gait measurement devices require external activation signals or external connections to start measurement, which limits their ability to initiate gait measurement based on user motion without external communication.
Innovation Solution
A gait measurement device equipped with a first sensor that outputs an activation signal in response to a detected magnetic field, activating a clock and a second sensor to measure physical quantities related to foot movement, generating and outputting measurement data without external communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a gait measurement device uses external activation signals or external connections to start measurement, then the device can be activated reliably, but the device cannot start measurement automatically based on user motion without external communication
Solution Approach 1:
The gait measurement device activates itself automatically by detecting the user's walking motion through its sensors, eliminating the need for external activation signals or communication. The device monitors its own operational state and initiates measurement when motion is detected, making the system self-sufficient and autonomous.
Solution Approach 2:
The patent replaces external mechanical or electronic activation mechanisms with an automatic sensor-based detection system. Instead of requiring external signals to trigger measurement, the device uses internal sensors to detect motion and automatically initiate the measurement process, substituting external control with internal autonomous detection.
2Reliability
If the device waits for external activation signals, then power consumption can be reduced, but measurement timing cannot be synchronized with user walking motion
Solution Approach 1:
The device employs periodic sampling of motion data at predetermined intervals to detect walking motion. This periodic detection mechanism allows the device to monitor for activation conditions continuously while maintaining low power consumption, and automatically trigger measurement when the periodic detection identifies walking motion, ensuring both timing synchronization and energy efficiency.
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 gait measurement to start automatically with user motion, synchronizing measurements across both feet, and generating accurate feature data for estimating physical conditions.
Implementation Method 1
a first sensor 11 that outputs an activation signal in response to detection of a magnetic field
Data Source
AI summary
A gait measurement device includes a first sensor that outputs an activation signal in response to detection of a magnetic field, a clock that generates a clock count value, a second sensor that measures a physical quantity related to movement of a foot, a control unit that is activated in response to the activation signal output from the first sensor to activate the clock and the second sensor, a data generation unit that generates sensor data using the physical quantity measured by the second sensor and generates measurement data associated with the clock count value and the sensor data at a timing when the physical quantity is measured, and an output unit that outputs the measurement data.