Adaptive Threshold Data Carrier Drive Apparatus
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Solution Overview
Problem
Existing data communication systems between data carrier and drive apparatuses face challenges in accurately discriminating data due to variations in current values caused by temperature changes and individual differences in elements and circuits, which affect the reliability of data transmission.
Innovation Solution
A data communication system that includes a data carrier drive apparatus with a detector to monitor current values and an updater to adjust a threshold value based on detected changes, allowing the system to accurately demodulate data by changing the current value according to data values and adjustment data transmitted during specific states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a constant current source is used for data transmission in the data carrier apparatus, then data can be transmitted to the data carrier drive apparatus, but the current value varies due to temperature changes and element variations, causing inaccurate data discrimination
Solution Approach 1:
The patent applies preliminary action by performing threshold value adjustment before actual data transmission. The data carrier drive apparatus adjusts the threshold value in advance based on detection values obtained during an adjustment period, so that the threshold is optimized for the current operating conditions before data communication begins. This preliminary adjustment compensates for temperature changes and element variations that would otherwise cause inaccurate data discrimination.
Solution Approach 2:
The patent implements feedback by continuously monitoring the detection value from the constant current source and using this information to adjust the threshold value. The data carrier drive apparatus detects the actual current value, compares it with expected values, and adjusts the threshold accordingly. This closed-loop feedback mechanism ensures that data discrimination remains accurate despite variations in operating conditions.
2Ease of operation
If the threshold value is fixed for data discrimination, then the data carrier drive apparatus can simplify its operation, but it cannot accurately discriminate data when current values change due to temperature and element variations
Solution Approach 1:
The patent applies dynamics by making the threshold value adaptive rather than fixed. The threshold value is dynamically adjusted based on the detection value from the constant current source. The system transitions from a static threshold approach to a dynamic one where the threshold automatically adapts to changing operating conditions, ensuring accurate data discrimination while maintaining operational simplicity through automated adjustment.
3Adaptability or versatility
If the data carrier apparatus uses a constant current source for transmission, then data transmission can be implemented, but individual variations in elements and circuits cause current value differences between different data carrier apparatuses
Solution Approach 1:
The patent applies parameter changes by adjusting the threshold value parameter in the data carrier drive apparatus to match the actual characteristics of each data carrier apparatus. Instead of trying to make all data carrier apparatuses produce identical current values, the system changes the threshold parameter adaptively based on the detection value from each specific apparatus, accommodating individual variations in elements and circuits.
Data Source
AI summary
A system includes a data carrier drive apparatus and a data carrier apparatus. The data carrier apparatus includes a unit to output transmission data during a first state and adjustment data during a second state, and a current changer configured to change a current value of a current flowing from the data carrier drive apparatus to the data carrier apparatus according to data values of the transmission data and the adjustment data. The data carrier drive apparatus includes a detector to detect a detection value corresponding to the current value of the current, a determiner to determine the data value of the transmission data by comparing the detection value with a threshold value during the first state, and an updater to update the threshold value based on the detection value during the second state.