Fault Detection Device for Electrical Instruments
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Solution Overview
Problem
Users of electrical instruments face difficulties in diagnosing and repairing faults due to the complexity of identifying faulty loads, leading to increased service time and labor costs, as well as inconvenient repeat visits by service engineers.
Innovation Solution
A fault detection device and method that controls operations of multiple loads within an electrical instrument, detects faults based on power generated when each load is driven, and transmits current signals to a terminal for analysis, allowing for accurate fault determination and display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a service engineer manually checks each internal load using a tester, then fault detection can be performed, but the process takes relatively long time and requires complicated procedures
Solution Approach 1:
The patent replaces the mechanical manual testing process with an automated electrical detection system. The detection device automatically controls power supply to each load, measures current consumption, and identifies faults without requiring physical disassembly or manual intervention, thus reducing service time while maintaining detection accuracy
Solution Approach 2:
The electrical instrument performs self-diagnosis through the detection device that automatically tests each internal load without external intervention. The system autonomously controls power supply, measures current, and identifies faulty loads, eliminating the need for service engineers to manually check each component
2Ease of operation
If the service engineer carries replacement loads for repair, then repairs can be performed on-site, but it is inconvenient and requires multiple visits if required loads are not carried
Solution Approach 1:
The detection device enables preliminary identification of faulty loads before repair. By accurately detecting which specific load is defective, the service engineer can prepare the correct replacement components in advance or order them beforehand, avoiding multiple visits and improving repair efficiency
3Reliability
If the electrical instrument displays only warning sounds or fault codes, then users can recognize that a fault exists, but users have difficulty judging the cause of the fault
Solution Approach 1:
The detection device segments the overall fault diagnosis into individual load tests. It systematically tests each internal load separately, identifies which specific component is faulty, and provides detailed information about the fault location, transforming generic fault codes into specific, actionable diagnostic data
Solution Approach 2:
The detection device acts as an intermediary between the electrical instrument's internal faults and the user or service engineer. It translates invisible electrical faults into visible, interpretable detection results, providing bridging information that connects the fault condition to actionable diagnostic insights
Data Source
AI summary
A fault detection device includes an interface electrically connected to an electrical instrument to transfer commercial power to the electrical instrument, transmit a command for driving one of a plurality of loads included in the electrical instrument to the electrical instrument, and detect current flowing in one of the plurality of loads of the electrical instrument; and a terminal configured to receive a current signal corresponding to the current flowing in one of the plurality of loads from the interface, determine whether the one load has a fault on the basis of the received current signal and display whether the load has a fault. A faulty load is determined by detecting current of only a load suspected to have a fault when a fault is generated in the electrical instrument so as to improve fault detection accuracy.