Vehicle Collision Wake-Up Control for Parked Impact Alerts
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Solution Overview
Problem
Existing motor vehicles lack an effective and immediate collision notification system, particularly when parked and temporarily abandoned, which can lead to delayed detection of collisions and potential safety hazards.
Innovation Solution
A motor vehicle equipped with a collision notification device that includes a transducer to detect acceleration, a passive safety control unit to process the signal, and a communication control unit that can be woken up to send a notification signal even when the vehicle is parked and turned off.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the communication control unit is in sleep mode during parking, then energy consumption is reduced, but collision detection and notification are delayed
Solution Approach 1:
The control system is divided into two independent parts: a passive safety control unit with permanent supply that continuously monitors collision sensors, and a communication control unit with deferred wake-up that handles notification. This segmentation allows the monitoring function to operate continuously while the communication function consumes minimal energy during parking, resolving the contradiction between energy saving and timely collision notification.
Solution Approach 2:
The passive safety control unit continuously monitors collision sensors even when the vehicle is parked and the communication control unit is in sleep mode. By performing the safety monitoring action in advance and independently, the system ensures that collision detection is not delayed by the communication unit's sleep state, while still enabling energy-saving mode for the communication subsystem.
2Extent of automation
If the communication control unit wakes up automatically after idle time, then diagnostic activities are performed, but collision notification occurs with great delay
Solution Approach 1:
The system separates automated diagnostic wake-up (performed by the communication control unit after idle time) from continuous safety monitoring (performed by the passive safety control unit with permanent supply). This segmentation allows automated diagnostics to proceed without compromising collision detection speed, as the passive safety unit independently monitors for collisions at all times.
Solution Approach 2:
The passive safety control unit acts as an intermediary between the collision sensors and the communication control unit. It continuously monitors sensor signals and can immediately trigger notification by activating the communication control unit, even before the automated wake-up schedule would activate it, thereby eliminating notification delays while preserving automated diagnostic functionality.
3Reliability
If frontal impact sensors are connected to the CAN network, then collision signals are processed, but the communication control unit cannot receive signals when turned off
Solution Approach 1:
The system separates the signal processing function into two stages: the passive safety control unit processes collision sensor signals continuously regardless of vehicle state, and the communication control unit processes and transmits notification signals only when activated. This segmentation ensures reliable collision signal processing even when the vehicle is turned off, as the passive safety unit remains operational with permanent supply.
Solution Approach 2:
The passive safety control unit serves as an intermediary that bridges the gap between collision sensors and the communication control unit. It continuously monitors sensor inputs and can activate the communication control unit when needed, ensuring that collision signals are reliably processed and transmitted even when the vehicle is in an off state and the communication unit would otherwise be inactive.
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 system enables prompt and effective notification of collisions to the driver or authorities, even when the vehicle is in a stationary state, thereby enhancing safety and reducing the risk of delayed detection.
Implementation Method 1
a transducer (5) configured to detect a quantity indicative of an acceleration of the motor vehicle (1)
Data Source
AI summary
A motor vehicle includes a control telecommunication network, an acceleration transducer configured to detect a quantity indicative of an acceleration of the motor vehicle and to generate an acceleration signal corresponding to the detected quantity, a passive safety control unit connected to the control telecommunication network and configured to receive the acceleration signal, determine from the acceleration signal an impact condition when the detected quantity indicates the satisfaction of a predetermined relationship with a threshold associated with said acceleration, and emit first and second impact signals when the impact condition is determined, a transceiver connected to the control telecommunication network and configured to receive the first impact signal and transmit a wake-up signal to the control telecommunication network in response to the reception of the first impact signal, a communication control unit connected to the control telecommunication network, and a wake-up control unit.