Vehicle Cabin Pressure Sensing for Low-Power Intrusion Detection
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Solution Overview
Problem
Existing vehicle-compartment detection systems consume excessive power and are ineffective in detecting abnormalities before the vehicle enters an abnormal state, such as unauthorized entry or leaving of individuals, due to their reliance on ignition or vehicle speed pulses.
Innovation Solution
A vehicle-compartment abnormality detection apparatus utilizing pressure sensors, a sensor signal processor, comparator, determiner, and abnormality detector, which activate only when sensor signals exceed a threshold, determining the presence of a key and detecting abnormalities before the vehicle is in an abnormal state, thereby conserving power and accurately identifying unauthorized entries or occupant presence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing detection systems rely on ignition or vehicle speed pulses, then the system can detect vehicle operation states, but the system consumes excessive power and fails to detect abnormalities before the vehicle enters an abnormal state
Solution Approach 1:
The detection system operates periodically based on sensor signal thresholds rather than continuously. The control unit activates detection functions only when sensor signals exceed predetermined thresholds, creating a periodic activation pattern that reduces power consumption while maintaining effective abnormality detection coverage
Solution Approach 2:
The system detects abnormalities before the vehicle enters an abnormal state by monitoring sensor signals continuously in a low-power standby mode and activating full detection functions preliminarily when threshold conditions are met, enabling early intervention before actual abnormalities occur
2Reliability
If the detection system activates continuously, then abnormality detection is comprehensive, but power consumption increases significantly
Solution Approach 1:
The detection system dynamically adjusts its operational state based on sensor signal conditions. It transitions between low-power standby mode and active detection mode according to whether sensor signals exceed predetermined thresholds, optimizing the balance between detection accuracy and power consumption in real-time
Solution Approach 2:
The system changes operational parameters (detection activation state) based on sensor signal threshold comparisons. When sensor signals exceed predetermined thresholds, the system changes from a low-power state to an active detection state, maintaining detection accuracy while minimizing overall power consumption
3Use of energy by moving object
If the system uses threshold-based activation, then power consumption is reduced, but detection sensitivity may be compromised
Solution Approach 1:
The system uses feedback from sensor signal threshold comparisons to control detection activation. When sensor signals exceed predetermined thresholds, the system receives feedback to activate full detection functions, ensuring that detection sensitivity is maintained precisely when abnormal conditions are indicated by the sensor signals
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The apparatus effectively detects abnormalities like unauthorized entry or leaving of individuals by minimizing power consumption and providing timely notifications, ensuring the vehicle remains secure and safe.
Implementation Method 1
a group of pressure sensors disposed inside a vehicle compartment of the vehicle
Data Source
AI summary
A vehicle-compartment abnormality detection apparatus for a vehicle includes a sensor signal processor, a comparator, a determiner, and an abnormality detector. The sensor signal processor receives a sensor signal from pressure sensors disposed inside a vehicle compartment. The comparator compares a sensor signal level with a predetermined threshold. The determiner starts up when a result of comparison indicates that the sensor signal level is greater than the predetermined threshold in a state where the drive system is stopped, and determines at least whether a key is present inside the vehicle compartment. The abnormality detector starts up when the result of comparison indicates that the sensor signal level is greater than the predetermined threshold in the state where the drive system is stopped, and detects an abnormality occurring inside the vehicle compartment when a result of determination indicates that the key is not present inside the compartment.