Robotic HEPA Filter Scanning for Automated Cleanroom Certification
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Solution Overview
Problem
Existing manual testing methods for HEPA filters in cleanrooms are laborious, time-consuming, and prone to human error, leading to inconsistent scan rates and limited data integration, which compromises the accuracy and efficiency of filter integrity testing.
Innovation Solution
A mobile, automated testing system equipped with a multi-axis robotic device and multiple probes and sensors, capable of concurrent data collection and data normalization, and featuring advanced software for workflow optimization and computational fluid dynamics analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual testing methods are used for HEPA filters, then labor flexibility is maintained, but testing time increases and accuracy decreases
Solution Approach 1:
The patent replaces manual mechanical testing operations with an automated robotic system that uses programmable motion control to position probes and collect data. The robotic device with multi-axis positioning replaces human operators, enabling consistent scan rates and automated data collection across multiple sensors, thereby reducing testing time while maintaining accuracy.
Solution Approach 2:
The system incorporates automated workflow optimization software that self-manages the testing process, including probe positioning, data collection timing, and result analysis. The robotic device autonomously navigates the testing area and performs measurements without continuous human intervention, improving productivity while reducing the time loss associated with manual operations.
2Measurement precision
If manual testing methods are used, then operational simplicity is maintained, but data accuracy and consistency deteriorate
Solution Approach 1:
The robotic testing system replaces manual probe handling with automated positioning mechanisms that maintain precise, consistent distances from the filter surface. The system uses programmable motion control to ensure uniform scan rates and repeatable measurement positions, eliminating the variability inherent in manual operations and thereby improving measurement precision despite increased operational complexity.
Solution Approach 2:
The system incorporates real-time feedback mechanisms where sensors continuously monitor probe position, scan rate, and measurement data quality. The workflow optimization software processes this feedback to automatically adjust positioning and timing, ensuring consistent data accuracy across multiple tests while managing operational complexity through automated control loops.
3Measurement precision
If multiple sensors are deployed for concurrent data collection, then measurement comprehensiveness improves, but data integration complexity increases
Solution Approach 1:
The robotic testing system employs a universal data collection platform that can interface with multiple different sensor types simultaneously. The system uses standardized communication protocols and a centralized data management architecture that handles diverse sensor inputs (particulate counters, photometers, airflow sensors) through a unified interface, improving measurement comprehensiveness while managing data integration complexity through modular design.
Solution Approach 2:
The workflow optimization software acts as an intermediary layer between multiple sensors and the control system. It synchronizes data streams from different sensors, normalizes data formats, and coordinates timing to ensure consistent multi-sensor operation. This intermediary processing layer manages the complexity of integrating multiple data sources while maintaining high measurement precision.
Data Source
AI summary
A system for cleanroom certification may include one or more robotic device. A robotic device may include an articulated arm configured to scan one or more probes and/or sensors along a path with respect to a filter and/or other device under test. The robotic device may be outfitted with one or more instruments. In some implementations, a robotic device may have a first probe (e.g., an isokinetic probe) connected by a first tube or hose to convey air samples to a first instrument (e.g., a particle counter or photometer), and a second probe connected by a second tube or hose to convey air samples to a second instrument. The robotic device may scan the probes across the filter face, maintaining a constant distance from the filter face, and the instruments may generate data regarding particulates measured/counted in samples obtained during the scan.