Vehicle Controller EMI Detection With External Receiver
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Solution Overview
Problem
Existing electromagnetic interference (EMI) protection devices for electronic control units (ECUs) in motor vehicles are inadequate in detecting extreme interference fields arising from specific vehicle placements, increased metal usage, or intentional interference attempts, leading to potential system failures.
Innovation Solution
A control unit device with a separate receiver outside the housing for detecting EMI fields, using conductive structures and antennas for wide-area detection, combined with a processing unit for evaluation, and a microcontroller to initiate safety measures when critical interference is detected, ensuring reliable detection and response.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If known protective devices are used for EMI protection, then basic electromagnetic interference protection is provided, but they are insufficient to detect extreme interference fields exceeding standard requirements
Solution Approach 1:
The protective device is segmented into a separate receiver unit with its own antenna system, independent from the control unit. This separation allows the receiver to be optimized specifically for detecting extreme EMI fields without being constrained by the control unit's housing and shielding, thereby improving both reliability of protection and precision of detection for interference fields exceeding standard requirements.
2Device complexity
If the receiver is integrated inside the control unit housing, then compact design is achieved, but detection of electromagnetic interference fields is limited by the housing shielding
Solution Approach 1:
The receiver is extracted from the control unit housing and implemented as a separate external device with its own antenna. This extraction eliminates the shielding effect of the housing on EMI field detection, allowing the receiver to detect electromagnetic interference fields with higher sensitivity and accuracy, while the control unit remains compact through electrical connection to the external receiver.
3Ease of manufacture
If standard EMI protection measures are implemented during design phase, then cost is controlled, but protection against extreme interference attempts is insufficient
Solution Approach 1:
The separate receiver continuously monitors electromagnetic interference fields in advance before they can affect the control unit. By detecting extreme interference fields preemptively and triggering safety measures beforehand, the system provides enhanced protection against extreme interference attempts and intentional attacks without requiring expensive hardening of the control unit housing itself.
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
Enhances EMI protection by enabling effective detection and response to critical interference, maintaining essential functions and initiating safety measures, thus improving operational safety and reliability of the control unit.
Implementation Method 1
the receiving device has at least one electrical conductor that extends, at least partially, along a vehicle's wiring harness as a receiving antenna for electromagnetic interference fields
Implementation Method 2
the receiving device has at least one conductor on a circuit board of the control unit, which encloses a connector of the control unit for the wiring harness for magnetic coupling
Data Source
Figure 1
AI summary
The invention relates to a controller device for a motor vehicle, particularly for an autonomously operable motor vehicle, comprising a controller (3) for operating the motor vehicle, and a protective device (9) for protecting the controller (3) from electromagnetic interference fields or interfering signals. According to the invention, the protective device (9) comprises a receiving device (10) for detecting electromagnetic interference fields or interfering signals, a processing device (11) for providing information about an electromagnetic interference field or interfering signal detected by the receiving device (10), and a control unit (8) which evaluates the detected field and/or interfering signal according to the detected information.