Radio Badge Power Reduction via Dynamic Sampling
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Solution Overview
Problem
In boundary detection localization systems, radio badges experience high power consumption due to fixed sampling rates, which are unnecessary when targets are far from critical regions, leading to inefficient energy use.
Innovation Solution
A method that determines the velocity of the radio badge using an accelerometer and estimates the critical time to reach a critical region, adjusting the sampling communication rate accordingly, with upper and lower bounds set to optimize power conservation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a high fixed sampling rate is used to ensure early detection of boundary crossing, then detection accuracy is improved, but power consumption increases
Solution Approach 1:
The patent applies dynamics by transitioning from a fixed sampling rate to a dynamic sampling rate that adjusts based on the target's proximity to the critical region. The sampling interval is modified in real-time: when the target is far from the boundary, sampling occurs at lower rates to conserve power; when approaching the boundary, sampling rate increases to ensure accurate detection. This dynamic adaptation resolves the contradiction between maintaining high detection accuracy and reducing power consumption.
Solution Approach 2:
The patent changes the sampling rate parameter based on spatial conditions. By calculating the distance to the critical region and adjusting the sampling interval accordingly, the system optimizes the balance between detection accuracy and energy consumption. The sampling rate is increased only when necessary (near boundaries) and decreased when the target is far away, directly addressing the technical contradiction.
2Reliability
If a high sampling rate is maintained when the target is far from the critical region, then real-time location information is provided, but unnecessary power consumption occurs
Solution Approach 1:
The patent applies partial action by providing real-time location information only when necessary (when the target is near the critical region). When the target is far from the boundary, the system reduces sampling frequency, accepting lower real-time performance in exchange for significant power savings. This selective application of full monitoring resolves the contradiction between maintaining reliability and avoiding energy waste.
Solution Approach 2:
The system uses periodic sampling with variable intervals rather than continuous high-rate sampling. The sampling period is extended when the target is far from the critical region, reducing power consumption while still providing periodic location updates. This periodic approach with adaptive intervals balances reliability requirements with energy conservation.
3Measurement precision
If frequent location sampling communication is performed, then position estimation accuracy is improved, but the radio badge power consumption increases
Solution Approach 1:
The patent makes the sampling communication frequency dynamic rather than fixed. The system adjusts the sampling interval based on the target's distance to the critical region and velocity, performing frequent communications only when position estimation accuracy is critical (near boundaries). This dynamic approach maintains measurement precision when needed while reducing power consumption during low-risk periods.
Solution Approach 2:
The system changes the sampling communication parameters (interval frequency) based on spatial and temporal conditions. By modifying the sampling rate parameter in response to proximity to the critical region, the system optimizes the trade-off between position estimation accuracy and power consumption, achieving high precision only when necessary.
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 reduces power consumption while maintaining accurate boundary detection by dynamically adjusting the sampling rate based on the target's proximity to the critical region, resulting in higher estimation accuracy and lower average positioning sampling rates compared to conventional methods.
Implementation Method 1
the radio badge is provided with an accelerometer
Data Source
AI summary
A method of reducing power consumption of a radio badge in a boundary detection localization system is disclosed, in which the radio badge is carried by a tracked target and performs location sampling communication with an infrastructure component of the localization system at the start and end of sampling time intervals such that positions of the radio badge can be estimated. The method includes: determining a velocity of the radio badge; estimating a critical time for the radio badge to reach a critical region through division in which a critical distance from an estimated position obtained at the end of a most recent sampling time interval to the critical region is the dividend, and the velocity of the radio badge is the divisor; and controlling the radio badge to perform location sampling communication with the infrastructure component of the localization system at the end of the critical time.