Network Transformer Connectivity Testing via Frequency Signals
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Solution Overview
Problem
Current methods for testing connectivity in network transformers are inefficient, costly, and fail to accurately detect open and short circuit faults, particularly due to the isolation effects of the transformer circuit and the need for additional test pins.
Innovation Solution
A method using a boundary scan approach with low and high frequency test signals to differentiate between open and short circuit faults by isolating the transformer circuit into 'first side' and 'second side' for separate testing, allowing for efficient detection without additional test pins.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a thimble is used to test connectivity by coupling to a pin of the network transformer, then the test can be performed, but the testing efficiency is low and the cost increases
Solution Approach 1:
The patent uses different frequency parameters (low frequency vs. high frequency test signals) to differentiate between open circuit and short circuit faults. By changing the frequency parameter of the test signal, the system can identify different fault types without requiring additional test pins or complex test equipment, thereby maintaining high detection accuracy while improving testing efficiency
2Measurement precision
If a thimble is used to test connectivity, then the test can be performed, but the production cost increases
Solution Approach 1:
The patent replaces the expensive thimble test equipment with a cost-effective boundary scan approach that uses standard test signals and existing test unit capabilities. This eliminates the need for specialized disposable test equipment while maintaining the ability to accurately detect both open and short circuit faults, thereby reducing production costs without sacrificing detection accuracy
3Productivity
If the network transformer is tested using traditional methods, then connectivity can be checked, but open circuit faults and short circuit faults cannot be distinguished
Solution Approach 1:
The patent changes the frequency parameter of the test signal to distinguish between different fault types. When a low frequency test signal is sent and a response is received, it indicates an open circuit fault. When a high frequency test signal is sent and a response is received, it indicates a short circuit fault. This parameter-based differentiation enables both fast testing and accurate fault identification simultaneously
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 method enables accurate and cost-effective testing of network transformers by distinguishing between open and short circuit faults using frequency characteristics, improving detection efficiency and reducing production costs.
Implementation Method 1
a test unit of the test units sending a low frequency test signal or a high frequency test signal to the network transformer by using a boundary scan manner
Data Source
AI summary
The present disclosure relates to a method for testing connectivity. The method is applied to an electronic equipment which is disposed include two test units (e.g. network interface controller, RJ-45 connector) and a network transformer. The test unit couple to the network transformer so that can send a high frequency test signal or a low frequency test signal to the network transformer respectively. When the test unit receives a low frequency response signal, it means correspond internal circuitry of the network transformer does not have a open circuit fault. When the test unit does not receive a high frequency response signal, it means correspond pins of the network transformer does not have a short circuit fault.