Electrical Testing Apparatus for Wiring Harness Signal Detection
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Solution Overview
Problem
Bundled wiring harnesses in electrical systems are difficult to inspect and repair due to their configuration, which can lead to degradation from rubbing and chafing, and existing testing methods are either ineffective or damaging.
Innovation Solution
An electrical testing apparatus with a common housing and multiple connectors is used to connect to an electrical panel and wiring harness, allowing for the detection of electrical signals and degradation of individual wires without disrupting the system's functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wires are bundled together into a wiring harness, then handling and routing becomes easier, but inspection and repair of individual wires becomes more difficult
Solution Approach 1:
A portable testing apparatus serves as an intermediary device that interfaces with the wiring harness through a connector. The apparatus includes a test circuit board with test points that can detect electrical signals in individual wires without requiring physical access to the bundled wires themselves, thus resolving the contradiction between easy handling and difficult inspection
Solution Approach 2:
The testing apparatus creates an electrical copy or representation of the wiring harness connections through its connector interface. By mapping the electrical signals from the harness to test points on the circuit board, it replicates the wire connections in a accessible format that allows individual wire inspection without disturbing the bundled configuration
2Ease of operation
If wires are bundled together in a wiring harness, then collective handling is simplified, but wires become subject to rubbing and chafing during vibration
Solution Approach 1:
The testing apparatus enables preliminary detection of wire degradation before it progresses to severe failure. By periodically testing electrical signals in individual wires while the harness is in service, potential issues from rubbing and chafing can be identified early, allowing preventive maintenance before signal loss occurs
Solution Approach 2:
The apparatus provides feedback about the electrical signal integrity of individual wires within the bundled harness. This feedback mechanism allows monitoring of wire conditions during operation, enabling detection of degradation caused by vibration and rubbing without requiring disassembly of the harness
3Measurement precision
If the wiring harness is back-probed with a conductive probe, then electrical signals can be tested, but the probe may split the insulation wiring or damage the connector
Solution Approach 1:
A connector serves as an intermediary interface between the testing apparatus and the wiring harness. Instead of directly probing the wires, the apparatus connects through the existing connector interface, eliminating the need for back-probing and preventing damage to insulation and connectors while still enabling electrical signal measurement
Solution Approach 2:
The testing apparatus accesses electrical signals through a connector interface that replicates the normal connection points. This copying approach allows measurement of electrical signals without physical contact with the wire insulation, thereby preventing splitting or damage to the wiring harness structure
Data Source
AI summary
Various methods and systems are provided for an electrical testing apparatus for an electrical panel and associated wiring harness. In one embodiment, an electrical testing apparatus includes a common housing; a first connector tethered to the housing via a first plurality of wires extending away from and coupled within the housing, where the first connector is adapted to connect to an electrical panel; a second connector mounted to the housing and adapted to connect to a wiring harness of the electrical panel, the wiring harness including a second plurality of wires; and a third connector mounted to the housing and including a plurality of test points for testing an electrical signal passing through each wire of the second plurality of wires.