Leakage Determining Device Timing Control
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Solution Overview
Problem
Existing devices for determining electrical leakage in circuits with a voltage source face errors due to temporary changes in the connected state between the voltage source and ground voltage, leading to incorrect determinations.
Innovation Solution
The device includes AC-signal-output and detecting units, with switching elements that prevent the timing of state changes from overlapping with the period when the AC signal is outputted, ensuring precise electrical leakage determination by avoiding voltage fluctuations caused by switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the AC signal output period and switching element state change timing overlap, then the device can continuously monitor electrical leakage and perform voltage detection, but the precision of electrical leakage determination deteriorates due to voltage fluctuations caused by switching
Solution Approach 1:
The control unit schedules switching element state changes to occur before or after the AC signal output period, rather than during it. This preliminary timing arrangement prevents the voltage fluctuations from interfering with the AC signal measurement, thereby maintaining measurement precision while still enabling continuous monitoring through coordinated scheduling of both functions
Solution Approach 2:
The system dynamically adjusts the timing of switching element operations based on the AC signal output schedule. The control unit coordinates the switching timing to avoid overlap with the measurement period, allowing the system to adaptively manage both continuous monitoring and precise measurement requirements through time-based dynamic control
2Adaptability or versatility
If switching elements frequently change state to enable voltage detection, then the adaptability of the device improves, but incorrect determination of electrical leakage increases due to voltage fluctuations on the signal line
Solution Approach 1:
The control unit plans and schedules switching element operations in advance, ensuring that state changes occur only when they will not interfere with AC signal output. This preliminary coordination allows the device to maintain adaptability for voltage detection while preserving the reliability of electrical leakage determination by preventing harmful overlaps
Solution Approach 2:
The control unit acts as an intermediary that mediates between the switching element operations and the AC signal output function. It coordinates the timing of both functions, allowing voltage detection capability to be maintained while preventing the switching-induced voltage fluctuations from corrupting the electrical leakage measurement
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 configuration effectively suppresses incorrect determination of electrical leakage by isolating the switching events from the AC signal output period, thereby maintaining precision in leakage detection.
Implementation Method 1
an AC-signal-output unit that outputs an AC signal having a specified frequency to a signal line that is connected to the specified circuit; a detecting unit that detects a peak value of the alternating-circuit signal on the signal line
Data Source
AI summary
A determining device determining electrical leakage in a specified circuit having a voltage source, includes: an AC-signal-output unit that outputs an AC signal to a signal line connected to the specified circuit; a detecting unit that detects a peak value of the AC signal; and a determining unit determining electrical leakage of the specified circuit based on the peak value. The specified circuit includes switching elements switching the connection between the voltage source and a specified voltage to be conduction or blocking; and a determining device prohibits overlapping of the point of time when the switching elements are switched from conduction to blocking or the point of time when switched from the blocking state to the conducting state, and the period from the point of time when the AC-signal-output unit starts outputting the AC signal until the detecting unit detects the peak value of the AC signal.