Insulation Detection Circuit Using Voltage Difference Monitoring
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Solution Overview
Problem
The insulation state of insulating elements in communication systems can deteriorate over time, leading to potential insulation failures such as short circuits, which existing technologies struggle to detect accurately and prevent.
Innovation Solution
A detection circuit is implemented in the communication system, comprising first and second insulating elements, and transmission and reception test circuits. The detection circuit outputs a detection signal based on the difference in voltage between the two insulating elements, allowing for the detection of insulation deterioration before it leads to a failure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing detection methods are used, then the system operates continuously, but insulation deterioration cannot be detected accurately
Solution Approach 1:
The detection circuit performs preliminary detection of insulation deterioration by monitoring voltage differences between primary and secondary sides before insulation failure occurs. The test circuits apply test signals and measure voltage differences to detect early signs of insulation degradation, enabling preventive action before complete failure happens.
Solution Approach 2:
The patent introduces an intermediary detection mechanism that measures voltage difference as an intermediate parameter to infer insulation state. By using voltage difference between primary and secondary sides as a mediator, the system can indirectly detect insulation deterioration without directly measuring insulation resistance, achieving accurate detection through this intermediate measurement.
2Reliability
If no detection circuit is implemented, then the system structure remains simple, but insulation failures cannot be prevented
Solution Approach 1:
The detection circuit is designed to perform multiple functions: it can detect insulation deterioration, determine which side (primary or secondary) has the deterioration, and provide control signals to stop transmission. This multi-functionality reduces the need for separate detection and control circuits, thereby limiting the increase in device complexity while improving reliability.
Solution Approach 2:
The detection circuit utilizes the existing insulating elements and voltage differences in the system itself to perform detection, rather than requiring completely external detection equipment. The test circuits use the system's own operational characteristics (voltage differences during operation) to detect insulation issues, allowing the system to self-diagnose without adding excessive external complexity.
3Measurement precision
If continuous monitoring is performed, then detection accuracy improves, but energy consumption increases
Solution Approach 1:
The detection circuit performs periodic detection at predetermined intervals rather than continuous monitoring. The control circuit is configured to execute detection operations at specific time intervals, which maintains adequate detection accuracy for preventing insulation failures while significantly reducing energy consumption compared to continuous monitoring. This periodic operation allows the system to balance detection precision with energy efficiency.
Data Source
AI summary
According to one embodiment, there is provided a detection circuit including a first insulating element, a second insulating element, a first transmission test circuit, a second transmission test circuit, and a reception test circuit. The first transmission test circuit is connected to the first insulating element. The second transmission test circuit is connected to the second insulating element. The reception test circuit is connected to each of the first insulating element and the second insulating element to output a detection signal corresponding to a difference between a voltage of the first insulating element and a voltage of the second insulating element.