Plug-in Connector Moisture Detection via Test Contact Element
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Solution Overview
Problem
Existing test devices for plug-in connections in motor vehicle steering systems lack the ability to detect moisture or fluid presence, which can lead to short circuits and malfunction, making it difficult to initiate safety measures to ensure safe operation.
Innovation Solution
A test device with a moisture or fluid sensor integrated into the protective chamber of the plug-in connection, utilizing a test contact element and an evaluation circuit to detect signal changes caused by moisture or fluid, allowing for the identification of potential short circuits and initiation of safety measures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a plug-in connection is used to connect control units to external devices, then the electrical contacts are protected against external influences like moisture or fluid, but there is no detection capability to identify moisture or fluid presence that could lead to short circuits
Solution Approach 1:
The test contact element is positioned in advance within the protective chamber to detect moisture or fluid before they can cause short circuits between contact elements. This preliminary detection allows the system to identify potential hazards before they manifest as actual failures.
Solution Approach 2:
The test contact element acts as an intermediary sensor between the moisture/fluid environment and the evaluation circuit. It mediates the detection process by converting the physical presence of moisture into an electrical signal that can be evaluated, bridging the gap between environmental conditions and system response.
2Object-affected harmful factors
If moisture or fluid is present in the protective chamber, then short circuits may occur between contact elements, but existing test devices lack the capability to detect this condition
Solution Approach 1:
The invention replaces complex moisture detection mechanisms with a simple electrical conductivity-based detection system. The test contact element uses electrical measurements to detect moisture presence, substituting what could have been a complex mechanical or chemical sensing system with an elegant electrical solution.
Solution Approach 2:
The test contact element utilizes the existing electrical environment within the plug-in connection to perform self-diagnosis. By injecting test signals through the existing contact elements and evaluating their response, the system uses its own operational signals to detect moisture, eliminating the need for separate dedicated detection systems.
3Ease of operation
If safety measures are to be initiated upon detecting moisture or fluid, then the system requires detection capability, but adding detection devices increases device complexity
Solution Approach 1:
The test contact element serves multiple functions: it acts as both a test signal pathway for evaluating contact element functionality and as a moisture detection sensor. This multi-functionality allows the system to perform safety monitoring without adding dedicated separate detection hardware, reducing overall device complexity.
Solution Approach 2:
The invention merges the test signal transmission function with the moisture detection function into a single integrated system. The same electrical pathway used for testing contact element functionality also serves as the sensing element for moisture detection, combining what could have been separate systems into one unified approach.
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
Enables the detection of moisture or fluid presence, preventing short circuits and allowing for timely safety measures to ensure safe vehicle operation by recognizing signal deviations indicative of critical moisture levels.
Implementation Method 1
the device has an electrically conductive test contact element, in particular a test contact pin, which protrudes into the protective chamber and may be contacted in an electrical manner. For the event that moisture and/or fluid is/are present in the protective chamber, this forms an electrical conductor between the test contact element and the ground contact element
Data Source
AI summary
A test device for a plug-in connection is configured to detect one or more of moisture and liquid in at least one protective chamber of the plug-in connection. The plug-in connection has a first plug part and a second plug part each with a plurality of electrically conductive contact elements. The first and second plug parts are configured to be plugged together such that at least some of the contact elements of the first plug part come into electrical contact with at least some contact elements of the second plug part. The first and second plug parts, when in the plugged-together state, form the at least one protective chamber, which is configured for the contact elements. In one embodiment, the plug-in connection is associated with a control unit of a steering system for a motor vehicle.