Connector Assembly Noise Filter for CAN-FD Signal Integrity
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Solution Overview
Problem
The increased communication speed and operation frequency in vehicle communication systems, particularly in CAN-FD networks, lead to significant noise in signal transmission, restricting the design flexibility of wire harnesses and potentially causing malfunctions.
Innovation Solution
A connector assembly with a noise filter, such as a low-pass filter or a resistor, is embedded between the main-line and sub-line ports to reduce signal noise, allowing only low-frequency signals to pass through and blocking high-frequency noise, thereby improving signal integrity and design freedom.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If communication speed and operation frequency are increased in CAN-FD networks, then information transmission capability is improved, but noise in the transmitted signal increases causing malfunctions
Solution Approach 1:
A noise filter is introduced as an intermediary component between the main-line terminal and sub-line terminal in the connector assembly. This filter acts as a mediator that allows legitimate signal transmission while blocking high-frequency noise, thus resolving the contradiction between maintaining communication speed and eliminating signal noise.
Solution Approach 2:
The patent converts the harmful high-frequency noise into a filtered-out component by using a low-pass filter design. The filter allows the beneficial low-frequency signal components to pass through while blocking the harmful high-frequency noise, thus transforming the noise problem into a solved issue through frequency-based separation.
2Adaptability or versatility
If the number and length of main line and sub-line are changed to optimize wire harness design, then design flexibility is improved, but noise in the transmitted signal increases
Solution Approach 1:
The noise filter serves as a universal intermediary component that can be integrated into various wire harness configurations. Regardless of how the number and length of main line and sub-line are changed for optimization, the filter remains in place to eliminate noise, thus preserving design flexibility while consistently blocking noise across all configurations.
3Object-affected harmful factors
If noise filter is embedded in connector assembly, then signal noise is reduced, but device complexity increases
Solution Approach 1:
The noise filter is merged with the connector assembly structure, where the filter body forms an integrated part of the connector housing. The main-line terminal and sub-line terminal are directly connected to the filter structure without requiring separate mounting components, thus reducing overall device complexity while maintaining noise filtering functionality.
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 implementation of the noise filter in the connector assembly effectively reduces signal noise, enhancing the stability and flexibility of vehicle communication systems, particularly in CAN-FD networks, by allowing for optimized design of wire harnesses without the limitations imposed by noise interference.
Implementation Method 1
The noise filter may be a low-pass filter for the signal transmitted between the main-line port and the sub-line port
Implementation Method 2
The noise filter may be a resistor electrically connecting between the main-line port and the sub-line port
Data Source
AI summary
An embodiment connector assembly includes a housing including an inner space formed therein, wherein ends of a main-line terminal and a sub-line terminal are inserted into a first side of the inner space, a main-line port inserted into and fixed to the inner space of the housing and electrically connected to the end of the main-line terminal inserted into the inner space, a sub-line port inserted into and fixed to the inner space of the housing and electrically connected to the end of the sub-line terminal inserted into the inner space, and a noise filter disposed between the main-line port and the sub-line port and electrically connected to each of the main-line port and the sub-line port, wherein the noise filter is configured to reduce a noise in a signal transmitted between the main-line port and the sub-line port.