Backpressure Testing Unit Calibration for Filter Manufacturing
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Solution Overview
Problem
Current backpressure testing methods, such as those using SuperFlow flowbenches, are inefficient for in-line testing of filters and other manufactured parts due to high costs, long cycle times, and large size, leading to incomplete testing and potential defects going unnoticed.
Innovation Solution
A method involving the use of a backpressure testing unit with calibrated testing positions, where reference parts are used to set upper and lower backpressure limits, allowing for efficient assessment of manufactured parts' backpressure without the need for frequent reference testing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a SuperFlow flowbench is used for backpressure testing, then measurement accuracy is improved, but testing speed deteriorates (long cycle time of 20-25 s)
Solution Approach 1:
The patent applies preliminary action by pre-calibrating the testing positions using reference parts before actual production testing. The calibration data stored in memory allows rapid comparison during testing, eliminating the need for repeated calibration procedures and enabling fast testing cycles while maintaining accuracy through pre-established reference standards.
Solution Approach 2:
The patent uses reference parts as simplified copies or representations of the actual manufactured parts for calibration purposes. These reference parts establish known backpressure values that serve as benchmarks, allowing the system to quickly assess production parts without requiring complex measurement procedures, thus improving testing speed while preserving measurement reliability.
2Measurement precision
If a SuperFlow flowbench is used for backpressure testing, then measurement accuracy is improved, but device size increases
Solution Approach 1:
The patent extracts the essential calibration function from the complex SuperFlow flowbench system by using separate reference parts and stored calibration data. This separation allows the main testing apparatus to remain compact while still achieving accurate measurements through comparison with pre-calibrated reference standards, eliminating the need for a large, complex flowbench for every testing location.
Solution Approach 2:
The patent introduces calibration data stored in memory as an intermediary between the physical reference parts and the measurement process. This digital intermediary allows the system to maintain measurement accuracy without requiring permanent physical access to large calibration equipment, enabling compact testing apparatus design while preserving measurement precision.
3Measurement precision
If a SuperFlow flowbench is used for backpressure testing, then measurement accuracy is improved, but cost increases
Solution Approach 1:
The patent performs calibration in advance using reference parts and stores the results in memory. This preliminary calibration action eliminates the need for expensive, frequently-used SuperFlow flowbenches during routine production testing, as the pre-established calibration data can be quickly compared against production parts, significantly reducing the cost per test while maintaining measurement accuracy.
Solution Approach 2:
The patent uses inexpensive reference parts as substitutes for expensive SuperFlow flowbench equipment during routine testing. These reference parts, combined with stored calibration data, provide a low-cost alternative that maintains measurement accuracy without requiring investment in costly specialized testing equipment for every testing position.
4Reliability
If 100% testing of manufactured parts is performed using traditional methods, then reliability is improved, but loss of time increases
Solution Approach 1:
The patent uses reference parts with known backpressure characteristics as benchmarks for comparing production parts. This copying approach allows rapid assessment of whether production parts meet specifications by comparison rather than absolute measurement, enabling 100% inspection of manufactured parts to be completed quickly without sacrificing defect detection reliability.
Solution Approach 2:
The patent changes the testing parameter from absolute backpressure measurement (which requires time-consuming calibration) to comparative assessment against stored reference values. This parameter change allows rapid testing by comparing production parts against pre-established standards, maintaining high reliability for defect detection while dramatically reducing the time required for each test.
Data Source
AI summary
According to various aspects of this disclosure, there is provided a method of backpressure testing manufactured parts, the method comprising: obtaining one or more reference parts and determining a reference backpressure measurement for each reference part indicative of the backpressure of that reference part when or if tested on a reference testing unit; calibrating one or more testing positions of a backpressure testing unit using the one or more reference parts; setting an upper backpressure limit and a lower backpressure limit for each of the one or more testing positions; and thereafter using the one or more testing positions to assess the backpressure of one or more manufactured parts.