Self-Adjusting Power-Failure Threshold Using Geometric References
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Solution Overview
Problem
Existing devices for detecting power failures in automotive electronic systems require significant computing power and reaction time, impacting consumption and responsiveness.
Innovation Solution
A self-adjusting device that uses a geometric sequence of reference signals to determine an electrical threshold for power failure detection, eliminating the need for voltage/current multipliers by assigning binary states to intervals and controlling electrical switches based on equidistant terms of the sequence, thereby automatically setting a threshold for maximum power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing devices use voltage/current multipliers and computing power to calculate power consumption, then power failure detection can be achieved, but device complexity and computational demands increase
Solution Approach 1:
The patent extracts the essential function of power failure detection from complex computational methods to a simpler voltage comparison method. By removing the voltage/current multiplier and power calculation unit, the system retains only the necessary voltage comparison functionality, significantly reducing device complexity while maintaining detection reliability
Solution Approach 2:
The patent replaces the computational system (multiplier and processor) with a direct electrical comparison system using comparators. This substitution eliminates the need for complex mathematical calculations and replaces them with straightforward voltage threshold comparisons, reducing both computational complexity and processing time
2Reliability
If existing devices calculate power consumption by multiplying voltage and current, then power failure can be detected, but reaction time is penalized
Solution Approach 1:
The patent implements preliminary action by pre-establishing voltage thresholds that correspond to power failure conditions. Instead of calculating power in real-time, the system has thresholds ready in advance, allowing immediate comparison and detection when voltage drops occur, thus reducing reaction time
Solution Approach 2:
The patent substitutes the time-consuming multiplication and calculation process with instantaneous voltage comparison. The comparators directly compare the voltage signal against pre-set thresholds without requiring computational processing, eliminating the time penalty associated with calculations
3Reliability
If existing devices use complex computing operations, then power consumption monitoring is achieved, but energy consumption increases
Solution Approach 1:
The patent extracts only the essential monitoring function from the complex computational system. By removing the power-consuming voltage/current multiplier and complex calculation units, the system maintains monitoring accuracy through simpler voltage comparison while significantly reducing energy consumption
Solution Approach 2:
The patent replaces energy-intensive computational operations with low-power voltage comparison using comparators. This substitution eliminates the need for continuous multiplication and processing, reducing energy consumption while maintaining the ability to accurately monitor power consumption through voltage threshold detection
Data Source
AI summary
A device for self-adjusting an electrical threshold includes a framing unit that compares a setpoint signal representative of the supply signal to a plurality of successive intervals of reference signals that increase in value according to a geometric sequence. The framing unit generates an output based on the interval bounding the setpoint signal, wherein the output controls a switch that is configured to provide one of the plurality of reference signals as an output, wherein the output reference signal is representative of the electrical detection threshold.