Inspection Apparatus Dynamic Current Adjustment for Spark Detection
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Solution Overview
Problem
Existing insulation inspection methods face challenges in detecting sparks between wiring patterns due to high current flow, which can lead to improper detection of voltage drops and defective boards, especially when inspecting a large number of wiring patterns.
Innovation Solution
An insulation inspection apparatus that adjusts the supply current based on the number of inspection points in each wiring pattern, allowing for more precise detection of voltage drops and board defects by varying the current value accordingly, thereby enhancing the detection of sparks and board quality assessment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a relatively high current is passed through the pair of wiring patterns to shorten the voltage stabilization time, then the inspection time is reduced, but the voltage drop detection becomes improper and spark detection fails
Solution Approach 1:
The patent applies dynamics by making the supply current adjustable rather than fixed. The current value is dynamically changed based on the number of inspection points in the wiring pattern, allowing the system to adapt between high current (for speed) and low current (for detection accuracy) conditions
Solution Approach 2:
The patent changes the electrical parameter (current value) based on the characteristics of the wiring pattern. By setting different current values according to the number of inspection points, the system optimizes both inspection speed and spark detection capability for different wiring configurations
2Reliability
If a relatively high voltage is applied between each pair of wiring patterns to perform insulation inspection, then the insulation quality can be assessed, but sparks occur between wiring patterns causing defects
Solution Approach 1:
The patent changes the voltage application parameters by controlling the supply current magnitude. By adjusting current based on wiring pattern characteristics, the system maintains sufficient voltage for insulation assessment while reducing excessive current that causes harmful sparks
3Speed
If a relatively high current is passed through every pair of wiring patterns extracted from a large number of wiring patterns, then the voltage stabilization is faster, but the occurrence of sparks cannot be detected properly
Solution Approach 1:
The patent applies local quality by treating different wiring patterns differently based on their specific characteristics (number of inspection points). Each wiring pattern receives an appropriately tailored current value, rather than a uniform high current, enabling local optimization of both speed and detection accuracy
Solution Approach 2:
The system dynamically adjusts the supply current based on the specific wiring pattern being inspected. This dynamic adaptation allows the system to achieve fast voltage stabilization when appropriate while maintaining spark detection capability for patterns where it is needed
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 apparatus effectively detects voltage drops and identifies defective boards with improved accuracy by adjusting the current supply in accordance with the number of inspection points, reducing the time required for inspection and enhancing the reliability of the detection process.
Implementation Method 1
a voltage applied between the pair of wiring patters at a predetermined time when the voltage applied to the pair of wiring patterns has stabilized after the start of the voltage application
Implementation Method 2
voltage detection device for detecting a voltage induced between the pair of wiring patterns by the voltage application
Implementation Method 3
voltage drop detection device for detecting whether or not a voltage drop has occurred due to sparks occurring between the pair of wiring patterns
Data Source
AI summary
An insulation inspection technique for allowing the occurrence of sparks to be detected more satisfactorily and allowing a board in which sparks have occurred to be more satisfactorily detected as being detective is provided. An insulation inspection apparatus detects a voltage induced between insulation inspection target wiring patterns by the application of a voltage during a time period from the start of the voltage application between the insulation inspection target wiring patterns to a predetermined time when the voltage between the insulation inspection target wiring patterns has stabilized. When a voltage drop due to sparks occurring between the insulation inspection target wiring patterns is detected during the time period, the board to be inspected is determined to be defective. In particular, supply current during the time period is set in accordance with the number of inspection points of an upstream wiring pattern of the insulation inspection target wiring patterns.