Leak Test Chamber Blocking to Prevent Specimen Misclassification

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Solution Overview

Problem

Existing leak testing methods risk misclassifying specimens as leak-tight due to manual handling, leading to incorrect assignment of leaking specimens with non-tight specimens.

Innovation Solution

Implement a mechanism to automatically block the test chamber based on leak test results, requiring additional operator action to remove specimens identified as leaking, thereby distinguishing the process for leaking and non-leaking specimens.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If manual handling of test specimens is used, then the process is simple and fast, but the risk of misclassifying leaking specimens as leak-tight increases

Engineering Contradiction:

Improvetesting speedVSAvoidclassification accuracy

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The control device receives the leak test result from the leak detector and automatically responds by blocking or releasing the test chamber. This closed-loop feedback system eliminates manual classification errors while maintaining high throughput, as the system automatically distinguishes between leaking and non-leaking specimens based on real-time test data.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The test chamber automatically blocks itself when a leak is detected, without requiring operator intervention for classification. The system serves itself by using the leak test result to control its own state, ensuring that leaking specimens are automatically separated from non-leaking ones while maintaining processing efficiency.

Inventive Principle:

Principle #25Self-service

2Reliability

If the test chamber is blocked for all specimens, then misclassification is prevented, but the handling process becomes more complex

Engineering Contradiction:

Improveclassification accuracyVSAvoidchamber control mechanism

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The test chamber's blocking state is dynamically adjusted based on the leak test result. The chamber is released for non-leaking specimens (simple handling) and blocked only for leaking specimens (preventing misclassification). This dynamic state change optimizes both reliability and operational simplicity by applying the blocking mechanism only when necessary.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The control device acts as an intermediary between the leak detector and the test chamber blocking mechanism. It processes the leak test result and automatically activates the blocking device only when a leak is detected, simplifying the overall system by using automated control rather than complex manual procedures or blocking all specimens indiscriminately.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If automatic blocking is implemented, then specimen classification accuracy improves, but additional operator action is required to remove leaking specimens

Engineering Contradiction:

Improvespecimen classification accuracyVSAvoidspecimen removal process

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The test chamber is preemptively blocked for leaking specimens before the operator attempts removal. This preliminary action prevents the operator from accidentally removing leaking specimens with non-leaking ones. The blocking state serves as a clear visual and physical indicator that differentiates leaking specimens, making the additional action required for removal a deliberate and error-proof process.

Inventive Principle:

Principle #9Preliminary anti-action

Solution Approach 2:

The blocking state of the test chamber serves as a clear indicator (analogous to color change) that distinguishes leaking specimens from non-leaking ones. When the chamber is blocked, it provides an immediate visual cue to the operator that a leak has been detected and that different handling procedures are required, reducing confusion and improving classification accuracy.

Inventive Principle:

Principle #32Color changes

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

Reduces the risk of mistakenly assigning leaking specimens to the leak-tight group by ensuring a distinct handling process for specimens with leaks, enhancing the accuracy of specimen classification.

Implementation Method 1

the test chamber can be connected to a vacuum pump. In the event of a leak in the test specimen, gas from inside the test specimen escapes through the leak into the vacuum chamber

Methodology Applied

Scientific EffectVacuum: Vacuum

Data Source

PatentEP4441483B1Leak test using a blocking device

Publication Date: 2025.10.22 INFICON GMBH

AI summary

The invention relates to a method for carrying out a leak test on a test object (12), the method comprising the following steps: introducing the test object (12) into a test chamber (14), carrying out a leak test on the test object (12) in the test chamber (14), opening the test chamber (14) and removing the test object (12) if the leak test showed that the test object (12) is leak-tight; and is characterized in that opening of the test chamber (14) is blocked in order to prevent removal of the test object (12) if the leak test showed that the test object leaks.