Vehicle RF Assembly with Windshield-Mounted Motion Sensor
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional vehicle security and remote start systems face challenges with false triggering of motion sensors due to improper mounting and limited range of wireless transmitters, which affects the reliability and convenience of the systems.
Innovation Solution
A vehicle control system incorporating a radio frequency (RF) assembly with an antenna and MEMS accelerometer mounted on the windshield, coupled with a controller assembly under the dashboard, allowing for enhanced RF range and robust motion sensing with threshold-based alarm indications and remote start shutdown capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the motion sensor is positioned beneath the dashboard close to the main control unit, then the wiring harness length is reduced and installation is simplified, but the sensor is subject to unintentional triggering due to improper mounting or positioning
Solution Approach 1:
The system is divided into two separate assemblies: an RF assembly housing containing the antenna and RF receiver positioned near the windshield for optimal RF reception, and a controller assembly housing containing the main control unit positioned beneath the dashboard. The motion sensor is integrated with the RF assembly housing, separating the sensor from the main control unit while maintaining functional connectivity through wireless communication.
2Length of moving object
If the antenna is positioned remotely near the windshield to extend RF range, then the wireless transmitter range is improved, but the system complexity increases due to separate mounting locations
Solution Approach 1:
The patent combines multiple functions into the RF assembly housing: the antenna, RF receiver, and motion sensor are all integrated into a single housing unit that can be mounted near the windshield. This merging approach extends RF range while avoiding the complexity of completely separate mounting locations for all components, as the RF and sensing functions share a common housing.
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 provides a longer range of RF control, reduces false positives, and offers a more convenient and cost-effective installation of motion sensors, enhancing the reliability and functionality of vehicle security and remote start operations.
Implementation Method 1
a motion sensor, such as a piezoelectric or capacitive accelerometer
Implementation Method 2
a motion sensor, such as a piezoelectric or capacitive accelerometer
Implementation Method 3
an antenna and RF receiver mounted on the windshield
Data Source
AI summary
A vehicle control system for a vehicle may include a radio frequency (RF) assembly including an RF assembly housing to be positioned within the vehicle, an antenna carried by the RF assembly housing, an RF receiver carried by the RF assembly housing, and a motion sensor carried by the RF assembly housing. The system may further include a controller assembly including a controller assembly housing to be positioned within the vehicle spaced apart from the RF assembly, and a controller carried by the controller housing. The controller may perform at least one first operation responsive to RF signals received by the RF receiver from a remote transmitter, and perform at least one second operation responsive to the motion sensor.