Vehicle Control Device Antenna Timing Synchronization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In vehicle control systems where an electronic key and in-vehicle device control a vehicle through wireless communication, the simultaneous transmission of drive signals to the antenna and reception of detection signals from the sensor via a common wire leads to delayed vehicle operations when the sensor detection and antenna driving timings overlap, causing a prolonged period between user and vehicle operations.
Innovation Solution
A vehicle control device that includes an antenna driving unit, a sensor detection signal determination unit, and a controller, which prioritizes the determination process of the sensor detection signal and controls the antenna driving unit to transmit drive signals only after the determination process is complete, ensuring that the reception of detection signals is not interrupted by drive signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the same wire is used for both transmitting drive signals to the antenna and receiving detection signals from the sensor, then the device complexity is reduced, but the response time is lengthened when transmission and reception timings overlap
Solution Approach 1:
The patent implements dynamic timing control where the controller adjusts the antenna driving timing based on the sensor detection timing. The controller determines whether the sensor is detecting a user operation at the timing when the antenna should be driven, and if so, delays the antenna driving until after the sensor detection is complete. This dynamic adjustment resolves the contradiction by making the system flexible in managing signal transmission and reception timing.
Solution Approach 2:
The patent applies preliminary action by having the controller check the sensor detection status before initiating antenna driving. The controller determines in advance whether the sensor is in the process of detecting a user operation, and only proceeds with antenna driving if the sensor detection is complete. This preliminary check prevents timing conflicts before they occur, ensuring that detection signals are received and processed before drive signals are transmitted.
2Speed
If the antenna driving and sensor detection occur simultaneously, then the operational speed is improved, but the reliability of signal reception deteriorates due to signal collision
Solution Approach 1:
The system dynamically adjusts the antenna driving timing based on real-time sensor detection status. When the controller determines that the sensor is detecting a user operation at the scheduled antenna driving time, it dynamically delays the antenna driving until after the sensor detection completes. This dynamic timing adjustment ensures that drive signals are never transmitted during sensor detection, preventing signal collision while maintaining efficient operation.
Solution Approach 2:
The controller continuously monitors the sensor detection status and uses this feedback to control the antenna driving timing. The controller determines whether the sensor is in the detection process at each timing when the antenna should be driven, and adjusts the driving timing accordingly. This feedback mechanism ensures that the system adapts to real-time conditions, preventing signal collision while maintaining operational efficiency.
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 configuration allows for reliable determination of vehicle operations, reducing the time between user and vehicle operations by ensuring that the sensor detection signal determination is completed before transmitting drive signals, thereby minimizing the delay caused by overlapping detection and drive signal timings.
Implementation Method 1
the antenna and the in-vehicle device transmit and receive a predetermined signal via an antenna
Data Source
AI summary
A vehicle control device configured to perform transmission of a drive signal for driving an antenna and reception of a detection signal from a sensor detection unit configured to detect a user operation by common wire, and a controller configured to control the antenna driving unit to transmit the drive signal. The controller is configured to determine whether the determination process is being performed by the sensor detection signal determination unit each when the antenna driving unit transmits the drive signal. The controller is configured to cause the antenna driving unit to transmit the drive signal after the sensor detection signal determination unit finishes the determination process in a case where the controller determines that the determination process is being performed by the sensor detection signal determination unit.