Vehicle Anti-Theft System Automatic Range Detection
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Solution Overview
Problem
Conventional vehicle security systems require manual operation, which can be inconvenient in dark environments or when the remote is misplaced, and do not automatically deactivate when the driver is within a predetermined range.
Innovation Solution
A vehicle anti-theft system utilizing a microprocessor, radio frequency transmitter, and receiver that automatically initiates and reverses security measures based on the presence of an encoded authorization signal from a remote unit, allowing for automatic deactivation when the driver is near and activation when outside a given range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual button operation is used for vehicle security systems, then the system can be controlled, but it becomes inconvenient in dark environments or when the remote cannot be located
Solution Approach 1:
The system automatically detects the remote's presence through radio frequency signals and autonomously activates or deactivates security functions without requiring manual button presses. The microprocessor monitors the transmission field and automatically initiates security measures when the remote exits the field, eliminating the need for user intervention in dark or difficult conditions.
Solution Approach 2:
The patent replaces mechanical button-pressing operations with wireless radio frequency communication. The remote transmits encoded signals wirelessly to the vehicle's microprocessor, which automatically processes the authorization and controls security functions, eliminating the need for physical contact with buttons or switches.
2Reliability
If automatic security measures are initiated when remote exits transmission field, then vehicle security is enhanced, but the system complexity increases
Solution Approach 1:
The system continuously monitors the transmission field for the presence of the remote through two-way radio frequency communication. The vehicle's transmitter sends interrogating signals and the remote responds with encoded authorization signals. When the remote exits the field, the microprocessor detects the absence of the expected response and automatically initiates security measures, creating a closed-loop feedback system that enhances security through automatic response.
Solution Approach 2:
The microprocessor serves multiple functions: it decodes authorization signals from the remote, controls door locks, manages alarm systems, and monitors the transmission field for remote presence. This multi-functional approach consolidates what could be separate complex systems into a single integrated control unit, managing system complexity while maintaining comprehensive security capabilities.
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
Enables convenient and automatic vehicle operation and security management, ensuring the vehicle is rendered inoperable when the driver is outside the range and operational when inside, enhancing security and usability.
Implementation Method 1
The transmitter continuously transmits an interrogating signal within a given transmission field surrounding the vehicle
Implementation Method 2
The microprocessor is connected to the engine control unit and the vehicle security system to perform a variety of functions upon receiving a predetermined encoded authorization signal from a remote unit
Data Source
AI summary
A vehicle anti-theft system includes a microprocessor and associated radio frequency receiver/transmitter installed within a vehicle. The microprocessor is operably connected to the engine control unit and the existing security system. The vehicle transmitter continuously transmits an interrogating signal within a given transmission field. A remote unit includes a transmitter and a receiver that are in discrete communication with the vehicle receiver and transmitter whenever the remote is within the transmission field. If the remote is outside the transmission field and is therefore unresponsive to the interrogating signal, the microprocessor initiates various security measures such as locking doors, disabling the engine and arming the security system. When the remote carrier reenters the transmission field, the interrogating signal triggers an authorized, encoded response from the remote causing the microprocessor to reverse each of the security measures to prepare the vehicle for routine operation.