Telematics Voltage Event Capture for Vehicle Type Detection
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Solution Overview
Problem
Existing telematics systems face challenges in accurately determining the type of vehicle (electric vehicle, internal combustion engine vehicle, or unknown) and efficiently capturing voltage-based events, particularly in scenarios where the vehicle type is unknown, leading to inefficient power management and data collection.
Innovation Solution
A method implemented in a telematics device that determines the vehicle type by comparing battery voltage with charging and cranking thresholds, queries the vehicle for type information when necessary, and captures cranking voltage values to identify vehicle operation, utilizing a dual-controller configuration with a main controller for asset data processing and an auxiliary controller for power-efficient I/O operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the telematics device continuously monitors battery voltage to capture all voltage-based events, then the reliability of event detection is improved, but the power consumption increases and battery drain worsens
Solution Approach 1:
The system dynamically adjusts its monitoring behavior based on vehicle type identification. For ICEV, it monitors for cranking events (voltage drops below threshold). For EV, it monitors for charging events (voltage rises above threshold). This dynamic adaptation allows reliable event detection while consuming power only when necessary, rather than continuous monitoring.
Solution Approach 2:
The system changes monitoring parameters (thresholds, monitoring frequency) based on the identified vehicle type. By setting appropriate voltage thresholds for cranking vs. charging events and adjusting monitoring intensity accordingly, the system maintains detection reliability while optimizing power consumption for each vehicle type scenario.
2Measurement precision
If the telematics device queries the vehicle for type information immediately upon installation, then the accuracy of vehicle type identification is improved, but the power consumption increases and may cause battery drain
Solution Approach 1:
The system performs preliminary voltage-based classification before querying the vehicle for type information. By first analyzing voltage patterns (cranking vs. charging behavior) and only then querying the vehicle if needed, the system achieves accurate identification while minimizing power consumption by avoiding unnecessary immediate queries.
Solution Approach 2:
The system uses voltage threshold comparisons as an intermediary step between installation and final vehicle type determination. This intermediary analysis filters cases that don't need immediate querying, reducing power consumption while maintaining accurate identification through the combination of voltage analysis and selective querying.
3Reliability
If the telematics device captures multiple cranking voltage values during vehicle startup, then the reliability of cranking event detection is improved, but the complexity of data processing increases
Solution Approach 1:
The system extracts only the essential feature from multiple voltage samples - whether the voltage dropped below the cranking threshold. By focusing on the threshold crossing event rather than processing all raw voltage values, the system maintains reliable detection while simplifying data processing to identify key events.
4Measurement precision
If the telematics device uses separate monitoring thresholds for ICEV cranking and EV charging, then the precision of event classification is improved, but the device complexity increases
Solution Approach 1:
The system dynamically selects which threshold to apply based on the identified vehicle type. For ICEV, it uses the cranking threshold; for EV, it uses the charging threshold. This dynamic selection allows precise event classification for each vehicle type while keeping the overall system manageable through automated adaptation.
Data Source
AI summary
A method in a telematics device capable of detecting and capturing both cranking and operating events is provided. The method configures the telematics device to use the same components to detect operating voltage for either electric or combustion vehicles, and to detect and facilitate capturing cranking events.