Dynamic Frequency Adjustment in Motion Measuring Systems
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Solution Overview
Problem
Motion measuring systems face challenges in balancing accuracy and power consumption, particularly when operating at high frequencies, which can lead to increased battery degradation and reduced durability, while lower frequency sampling compromises measurement accuracy.
Innovation Solution
A method is introduced to dynamically adjust the measurement, digitizing, and transmission frequencies of optical sensors based on predetermined movements, using adjustment values specific to each movement to optimize trade-offs between accuracy, power consumption, and data congestion, allowing for enhanced accuracy and reduced power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the motion measuring system operates at a relatively high frequency to enhance accuracy, then measurement precision is improved, but power consumption increases and battery durability deteriorates
Solution Approach 1:
The patent applies dynamics by making the sampling frequency adjustable rather than fixed. The system dynamically adapts the frequency at which optical sensors sample data based on the detected motion characteristics. When motion is detected, the system increases the sampling frequency to maintain measurement accuracy. When motion is absent or minimal, the system decreases the sampling frequency to reduce power consumption. This dynamic adjustment resolves the contradiction between maintaining high measurement precision and reducing power consumption.
Solution Approach 2:
The patent changes the parameter of sampling frequency based on detected motion levels. The system monitors motion characteristics and adjusts the sampling frequency parameter accordingly. By changing this critical parameter dynamically, the system can operate at high frequency when needed for accuracy and low frequency when power conservation is prioritized, thus resolving the technical contradiction between measurement precision and power consumption.
2Measurement precision
If the motion measuring system operates at a relatively high frequency to enhance accuracy, then measurement precision is improved, but the number of charge/discharge cycles of the battery increases, worsening durability
Solution Approach 1:
The system dynamically adjusts the sampling frequency based on motion detection, reducing the frequency during stationary periods to minimize battery charge/discharge cycles. This dynamic operation allows the system to maintain measurement accuracy during active use while significantly reducing wear on the battery during idle periods, thereby extending battery durability.
Solution Approach 2:
The system implements periodic sampling rather than continuous high-frequency sampling. By sampling at intervals adjusted according to motion detection, the system reduces the total number of charge/discharge cycles over time while maintaining sufficient measurement accuracy during active periods, thus improving battery durability.
3Use of energy by moving object
If the motion measuring system samples at a relatively low frequency to reduce power consumption, then power consumption is reduced, but measurement precision deteriorates
Solution Approach 1:
The system dynamically switches between low and high sampling frequencies based on motion detection. During stationary periods, it operates at low frequency to minimize power consumption. When motion is detected, it transitions to high frequency sampling to ensure measurement accuracy. This dynamic adaptation resolves the contradiction by matching the sampling frequency to the actual measurement needs.
Solution Approach 2:
The system uses feedback from motion detection to adjust the sampling frequency. By continuously monitoring motion characteristics and using this feedback to modulate the sampling rate, the system ensures that measurement precision is maintained when needed while minimizing power consumption during idle periods, thus resolving the contradiction between these two parameters.
4Measurement precision
If the motion measuring system transmits data at a relatively high frequency to maintain accuracy, then measurement precision is improved, but data congestion increases
Solution Approach 1:
The system dynamically adjusts the data transmission frequency based on motion detection. During stationary periods, it transmits data at low frequency or pauses transmission to avoid data congestion. When motion is detected, it increases transmission frequency to maintain measurement accuracy. This dynamic adjustment resolves the contradiction between maintaining precision and avoiding data congestion.
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
This approach enables high accuracy motion measuring while minimizing power consumption and data congestion, effectively extending battery life and maintaining measurement precision across varying motion levels.
Implementation Method 1
one or more optical sensors that are arranged at a distance from a target user so that the one or more optical sensors receive light from one or more body members of the user
Data Source
AI summary
A motion measuring system comprises a plurality of sensors and at least one computing device in communication with the plurality of sensors. The plurality of sensors comprise one or more optical sensors and one or more body member sensors. A user interface provided by the at least one computing device is used to instruct a subject to perform a movement of one or more body members. An adjustment of one or more frequencies of one or more of the plurality of sensors is performed to reduce a power consumption of at least one of the plurality of sensors. The adjustment is performed based at least in part on the movement which the subject is instructed to perform. A motion of the subject is measured using the one or more optical sensors of the motion measuring system during or subsequent to performing the adjustment of the one or more frequencies.