Power-Line Battery Pack ID Reading With Adaptive Thresholding
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Solution Overview
Problem
Existing systems for identifying battery packs in electric assisted bicycles face challenges in accurately receiving identification information superimposed on power lines due to potential offsets in current or voltage measurements, leading to false determinations.
Innovation Solution
An identification information receiving device that adjusts its determination threshold value based on real-time measurement variations, using a measurement value obtainment unit, identification information reading unit, and threshold value setting unit to adaptively set the threshold between representative values, reducing false determinations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed determination threshold value is used to read identification information from the power line, then the reading process is simple and fast, but false determination occurs due to measurement offsets from component variations and current consumption changes
Solution Approach 1:
The patent applies dynamics by transitioning from a fixed threshold value to a dynamically adjustable threshold. The determination threshold value is no longer static but is adapted based on actual measurement conditions, allowing the system to respond to variations in component characteristics and current consumption. This enables the threshold to move optimally for each measurement scenario, resolving the contradiction between simplicity and reliability.
Solution Approach 2:
The system implements self-service by automatically adjusting its own determination threshold without external intervention. The identification information receiving device autonomously modifies its threshold based on measured offsets from component variations and current consumption changes, eliminating the need for manual calibration or external reference standards while maintaining high identification accuracy.
2Adaptability or versatility
If component characteristics and current consumption are standardized to maintain a fixed threshold, then device complexity is reduced, but adaptability to different operating conditions deteriorates
Solution Approach 1:
The patent applies parameter changes by modifying the determination threshold value based on measured offsets. Instead of standardizing component characteristics to maintain a fixed threshold, the system allows the threshold parameter to change dynamically according to actual operating conditions. This enables adaptation to different component variations and current consumption patterns without requiring physical standardization or additional hardware.
Data Source
AI summary
In an identification information receiving device connected to an identification information transmitting device by a power line, a measurement value obtainment unit obtains a measurement value of an electric current or a voltage in the power line. An identification information reading unit reads, as binary data, identification information defined by a plurality of bits and superimposed on the electric current or the voltage in the power line by the identification information transmitting device, by determining whether the measurement value corresponding to each bit of the identification information is greater or less than a determination threshold value (other than 0). A threshold value setting unit compares the latest determination threshold value and the measurement value corresponding to each bit of the identification information superimposed on the electric current or the voltage in the power line, calculates two representative values that are a representative value of the measurement value greater than or equal to the determination threshold value and a representative value of the measurement value less than the determination threshold value, and sets the determination threshold value to an intermediate value between the two representative values as an updated determination threshold value.