Filter Test Probe Remote Mode Control and Auto Exhaust
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Solution Overview
Problem
Existing filter testing devices are limited in their ability to change operation modes without interacting with the base unit, do not allow remote information entry, cannot test unstable samples, and fail to automatically exhaust residual samples when switching between upstream and downstream testing, and do not adjust operations based on probe connection.
Innovation Solution
A filter testing apparatus with a base unit and probe that allows mode changes from the probe, enables remote information entry, automatically exhausts residual samples, and adjusts operational characteristics based on probe connection, including signal noise suppression capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the base unit controls all mode changes, then the system structure remains simple, but the operator cannot change modes remotely from the probe location
Solution Approach 1:
The control system is segmented into two independent parts: a base unit and a probe. Each has its own control processor that can independently manage mode changes. This allows the operator to change modes from the probe location without requiring complex communication protocols or centralized control, thus improving ease of operation while keeping the overall system relatively simple.
Solution Approach 2:
A communication interface acts as an intermediary between the probe and base unit control processors. This intermediary enables coordinated control without requiring direct physical manipulation of the base unit controls, allowing remote mode changing while maintaining system simplicity through standardized communication protocols.
2Reliability
If residual samples remain in the probe and base unit, then the system can maintain continuous operation, but the samples interfere with subsequent testing when modes are switched
Solution Approach 1:
The system automatically executes sample exhaustion as a preliminary action before initiating a new test mode. When the operator switches from upstream to downstream sampling (or vice versa), the control processor automatically activates the exhaust function to remove residual samples from the probe and base unit before the next test begins. This ensures testing accuracy is not compromised by interfering samples while minimizing time loss through automation.
Solution Approach 2:
The system uses feedback from sensors that detect the presence of residual samples and the current operational mode. Based on this feedback, the control processor automatically determines when sample exhaustion is needed and executes it at the appropriate moment, ensuring reliable testing while optimizing time efficiency through intelligent automation rather than manual intervention.
3Reliability
If the system tests samples without automatic exhaustion, then the operation is simpler, but unstable test samples cannot be reliably tested
Solution Approach 1:
The system performs self-service by automatically managing its own sample exhaustion based on detected conditions. When unstable samples are detected or when mode switching occurs, the control processor autonomously activates the exhaust function without requiring external intervention. This self-service capability enables reliable testing of unstable samples while keeping the complexity manageable through automated decision-making based on sensor feedback.
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
Enables efficient, in-situ filter testing with improved operational flexibility, stability, and accuracy by allowing mode changes, remote data entry, and automatic sample handling, ensuring reliable filter performance assessment.
Implementation Method 1
Photometers typically utilize forward light scattering to measure any leakage of aerosol through the filter being tested.
Data Source
AI summary
A preferred form of the invention is directed to a system and method used to test filters. The system preferably includes a base unit and a probe operably associated with the base unit. The probe is configured to be deployed adjacent the filter being tested while the filter is located in an operating position. The probe is further configured to allow an operator to vary the mode of operation of the base unit from the probe. The system is configured to automatically exhaust any residual test sample from the base unit and the probe when the system changes between testing a sample upstream and downstream of the filter. The system further includes noise suppression on at least one of the upstream test sample and downstream test sample. The system further is configured to detect when the probe is connected to the base unit.