Bus Node Ground Contact for Work Machine Signal Integrity
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Solution Overview
Problem
Existing bus nodes for work machines experience interference signal issues due to deviations in ground potential caused by long bus cables and external influences, leading to reduced signal integrity and increased susceptibility to interference.
Innovation Solution
A bus node with direct electrical contact to the functional module's ground connection, using spring-elastic contact blades or screw connectors, ensures equal ground potential between the bus node and the functional module, reducing interference signal output and increasing resistance to incoming interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ground potential is provided via bus cable from control module to bus node, then electrical connection is established, but ground potential deviation occurs due to cable length and external influences
Solution Approach 1:
The ground connection is extracted from the bus cable path and established separately through the first coupling means. This separates the ground potential reference from the signal transmission path, eliminating ground potential deviations caused by cable length and external influences on the bus cable.
Solution Approach 2:
The first coupling means acts as an intermediary element that establishes a direct ground connection between the bus node and functional module arrangement, bypassing the bus cable. This intermediary ground path ensures stable ground potential reference independent of the bus cable's external exposure.
2Object-affected harmful factors
If direct electrical contact with ground connection is implemented, then interference signal output is reduced, but coupling complexity increases
Solution Approach 1:
The first coupling means combines multiple functions into a single coupling element: it provides both the ground connection (first contact means) and the signal/connection pathway (second coupling means). This integration reduces the number of separate components and simplifies the overall coupling structure.
Solution Approach 2:
The first coupling means is designed as a multi-functional component that simultaneously establishes ground potential reference and enables electrical connection for signal transmission. This universal coupling element eliminates the need for separate ground wires and signal connectors, reducing coupling complexity.
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 stabilizes the ground potential, minimizing interference signal output and maximizing resistance to incoming interference, thereby enhancing signal transmission reliability and integrity.
Implementation Method 1
the first coupling means comprises a first contact means that is configured for a direct electrical contact with a ground connection of the functional module arrangement
Implementation Method 2
using spring-elastic contact blades
Data Source
AI summary
A bus node for an electric coupling of a bus system to a functional module arrangement, having an electronic circuit for converting electrical signals between a bus protocol provided by the bus system and an internal communications protocol provided by the functional module arrangement, and having a first coupling means for electrically connecting the electronic circuit to the functional module arrangement, and having a second coupling means for electrically connecting the electronic circuit to the bus system, wherein the first coupling means comprises a first contact means that is configured for a direct electrical contact with a ground connection of the functional module arrangement.