Automatic Bus Wire Integrity Verification Device
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Solution Overview
Problem
Current methods for verifying the integrity of electrical wiring in complex systems like aircraft CAN buses are inefficient and prone to missing subtle faults, as they rely on fault-tolerant designs that make it difficult to detect build errors during installation, and require extensive manual checks.
Innovation Solution
A device with measurement circuitry and a bus connector that automatically performs verification tests on selected wires by comparing measured electrical parameters to expected values, including detection of short circuits, and provides a user interface for easy operation and data presentation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fault-tolerant CAN bus design is used, then system reliability is improved, but fault detection capability deteriorates
Solution Approach 1:
The device performs preliminary wire integrity verification by measuring resistance values between wire pairs before the system is operational. This allows detection of build errors during installation while the fault-tolerant CAN bus design remains intact for operational reliability.
Solution Approach 2:
The verification device acts as an intermediary tool that temporarily connects to the bus during installation to perform measurements. It does not interfere with the normal fault-tolerant operation but provides separate verification capability during the installation phase.
2Measurement precision
If manual wire checking is performed, then measurement precision is improved, but productivity deteriorates
Solution Approach 1:
The device automatically performs verification tests by sequentially connecting to different wire pairs and measuring their resistance values. The measurement circuitry autonomously identifies wire configurations and compares measured values against expected ranges without requiring manual observation or interpretation.
Solution Approach 2:
The device replaces manual mechanical checking procedures with automated electrical measurement. The measurement circuitry uses electrical resistance measurement to verify wire integrity, substituting human inspection with automated electronic verification that is both faster and more precise.
3Reliability
If comprehensive wire verification is performed, then reliability is improved, but device complexity deteriorates
Solution Approach 1:
The verification device focuses on testing specific wire pairs (CAN_H, CAN_L, and shield wires) rather than attempting to verify all possible wire connections in the system. This segmented approach provides comprehensive verification of critical bus wires while keeping the device manageable in complexity.
Solution Approach 2:
The device verifies wire integrity by measuring electrical resistance parameters and comparing them against expected value ranges. This parameter-based verification method provides reliable detection of wire faults while maintaining a relatively simple measurement and comparison system.
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 device efficiently verifies wire integrity with minimal user intervention, reducing the likelihood of missed faults and streamlining the verification process, enabling reliable detection of subtle failures in a cost-effective manner.
Implementation Method 1
measuring a value of an electrical parameter associated with the wire under test
Data Source
AI summary
A device for verifying wire connectivity of a bus may include a bus connector configured to connect to a bus comprising a plurality of wires and measurement circuitry configured to perform a verification test on each wire of the bus. The verification test of each wire may include connecting a wire under test in a predetermined configuration relative to the other wires for performing the verification test and measuring a value of an electrical parameter associated with the wire under test. The verification test may also include comparing the value of the measured electrical parameter associated with the wire under test to an expected value of the electrical parameter. The wire under test passes the verification test in response to the measured value of the electrical parameter corresponding substantially to the expected value of the electrical parameter.