Telematics Terminal Dark Current Detection via Dynamic Thresholds
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Solution Overview
Problem
Conventional methods for determining dark current excess in telematics terminals fail to accurately identify which electronic device is causing excessive current consumption, as they rely solely on predefined reference values without considering current dissipation patterns and environmental factors like vehicle temperature.
Innovation Solution
A method and apparatus that calculate real-time current consumption in telematics terminals, dynamically compensating for vehicle temperature and battery charge level to determine if dark current is exceeded, and transitioning to a protection mode to prevent battery discharge by sending a warning message and requesting remote start when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional methods use predefined reference values to determine dark current excess, then the determination process is simple, but the accuracy of identifying excessive current sources is poor
Solution Approach 1:
The patent implements dynamic dark current threshold adjustment based on vehicle temperature conditions. The controller dynamically modifies the dark current reference value according to temperature ranges, transitioning from static predefined values to adaptive dynamic thresholds that reflect actual operating conditions, thereby improving identification accuracy without excessive complexity
Solution Approach 2:
The patent changes the parameter of dark current threshold from fixed to variable based on temperature. By establishing different threshold values for different temperature ranges (e.g., lower thresholds at high temperatures where dark current naturally increases), the system achieves more accurate identification of genuine dark current excess conditions
2Use of energy by moving object
If the telematics terminal operates in sleep mode to save power, then energy consumption is reduced, but the ability to receive remote control messages may be compromised
Solution Approach 1:
The patent implements periodic wake-up mechanisms where the telematics terminal periodically activates from sleep mode to check for remote control messages. This allows the system to maintain low power consumption during normal operation while ensuring reliable message reception by periodically becoming active, balancing energy savings with communication reliability
Solution Approach 2:
The system uses feedback from the receiver to determine whether to maintain sleep mode or transition to active mode. When messages are detected or expected, the terminal wakes up to process them, creating a feedback loop that adjusts power state based on communication needs, thereby maintaining both energy efficiency and reliability
3Measurement precision
If dark current threshold is lowered to improve detection sensitivity, then more dark current excess cases are detected, but false alarms increase due to temperature variations
Solution Approach 1:
The patent adjusts the dark current threshold parameter dynamically based on temperature conditions. Instead of using a single low threshold that causes false alarms, the system establishes temperature-dependent thresholds that account for the natural increase in dark current at higher temperatures, maintaining detection sensitivity while eliminating false positives
Solution Approach 2:
The threshold transitions from static to dynamic, adapting to environmental conditions. The controller continuously monitors temperature and adjusts the threshold accordingly, creating a dynamic detection system that maintains optimal sensitivity across varying operating conditions without generating false alarms
Data Source
AI summary
A dark current excess prevention method in a telematics terminal installed in a vehicle includes: calculating a current consumption amount up to a present time upon sensing a transmission operation in a sleep mode; determining whether the calculated current consumption amount exceeds a predetermined dark current reference value; and determining that a dark current is exceeded when the calculated current consumption amount exceeds the dark current reference value.