Vehicle Telematics Unit Detecting Handheld Device Presence
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Solution Overview
Problem
Vehicle owners face inconvenience when trying to determine if their handheld communication devices are left inside a vehicle, especially when the vehicle is parked at a significant distance, as existing GPS-based location methods are not accurate enough to confirm the device's presence within the vehicle.
Innovation Solution
A method involving a central facility that instructs the vehicle's telematics unit to detect the presence of a handheld communication device via short-range wireless links or by listening for an acoustical signal generated by the device, providing a message to the user indicating whether the device is inside the vehicle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GPS-based location methods are used to determine device presence in vehicle, then location information can be obtained, but the accuracy is insufficient to confirm device presence within the vehicle
Solution Approach 1:
The patent introduces intermediate detection mechanisms (acoustic sensors, short-range wireless receivers) that act as mediators between the GPS system and the device. These intermediaries provide localized verification within the vehicle cabin, confirming whether the device is actually inside the vehicle rather than merely nearby, thus resolving the accuracy-reliability contradiction.
Solution Approach 2:
The patent replaces the purely GPS-based mechanical/location system with acoustic and wireless detection systems. The acoustic signal detection and short-range wireless communication systems substitute for GPS limitations, providing more reliable presence confirmation by detecting device-specific signals rather than relying solely on geographic coordinates.
2Reliability
If vehicle owner travels to vehicle to check for device, then device presence can be determined, but time and travel effort are consumed
Solution Approach 1:
The vehicle's telematics system automatically performs the device presence check without requiring the owner's physical intervention. The system self-initiates acoustic signal listening and wireless communication attempts to detect the device, then automatically reports results to the owner, eliminating the need for the owner to travel to and manually search the vehicle.
Solution Approach 2:
The system performs preliminary device detection actions automatically when the vehicle is parked or when the owner requests a check. The telematics unit proactively listens for acoustic signals and attempts wireless connections before the owner needs to know the result, providing advance information that prevents unnecessary travel.
3Measurement precision
If acoustic signal detection method is used, then device presence can be accurately determined, but additional communication steps are required
Solution Approach 1:
The telematics unit performs multiple functions: it serves as both the acoustic signal listener and the short-range wireless communicator, and also acts as the reporting mechanism to the owner. By making the telematics unit multi-functional, the patent avoids adding separate dedicated devices, thereby reducing overall system complexity while maintaining high detection accuracy.
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
This method allows vehicle owners to remotely determine if their handheld communication devices are in the vehicle without the need for a lengthy trip, enhancing convenience and accuracy over traditional GPS-based methods.
Implementation Method 1
listening for an acoustical signal that is generated by the HCD; detecting the absence or presence of the acoustical signal generated by the HCD at the vehicle
Implementation Method 2
sending a message to the HCD with an instruction to generate the acoustical signal
Data Source
AI summary
A system and method for determining whether a handheld communication device (HCD) is located inside a vehicle includes: receiving at a central facility a request to locate the HCD; sending a message to the vehicle with an instruction to determine if the HCD is present in the vehicle; receiving a response from the vehicle that indicates whether or not the HCD is present in the vehicle; and transmitting a message to a user of the HCD indicating whether the HCD is located inside of the vehicle.