Multiple Sensor Blocks in Particle Counter for Wide Size Detection
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Solution Overview
Problem
Existing particle counters are limited in detecting a wide range of particle sizes, are difficult to calibrate, and lack means for detecting equipment failure.
Innovation Solution
A system with multiple sensor blocks and photo-amplifier sub-assemblies within a single instrument, where each block is communicatively coupled to a common counter board, allowing for enhanced sensitivity, failure notification, calibration monitoring, and redundancy, enabling detection of a wide range of particle sizes and improved calibration ease.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single sensor block is used in the particle counter, then the device complexity is reduced, but the measurement precision and reliability for detecting a wide range of particle sizes deteriorates
Solution Approach 1:
The particle counter is divided into multiple sensor blocks (first sensor block, second sensor block, etc.), each with its own photo-amplifier sub-assembly. This segmentation allows each sensor to be optimized for specific particle size ranges while collectively covering a broader detection spectrum, thereby improving measurement precision without requiring a single overly complex sensor system.
2Reliability
If multiple sensor blocks are used in the particle counter, then the reliability and measurement precision are improved, but the device complexity increases
Solution Approach 1:
Multiple sensor blocks are merged into a single integrated particle counter instrument, with all sensor blocks communicatively coupled to a common counter board. This merging approach improves reliability through redundancy and enhanced measurement precision while managing complexity through unified control architecture and shared processing resources on the common counter board.
Solution Approach 2:
The common counter board serves multiple functions: it processes signals from all sensor blocks, performs pulse discrimination, counts particles across different size channels, and manages calibration for all sensors. This multi-functionality reduces the need for separate dedicated circuits for each sensor, thereby improving reliability without proportionally increasing device complexity.
3Speed
If hardware-based pulse discrimination is used, then the speed of particle detection is improved, but the ease of calibration and failure detection deteriorates
Solution Approach 1:
The system incorporates feedback mechanisms where the counter board continuously monitors pulse signals from multiple sensors, compares them against calibration thresholds, and adjusts discrimination parameters as needed. This feedback approach maintains high-speed detection while enabling dynamic calibration and failure detection that is much easier to implement and adjust than fixed hardware discrimination alone.
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 system achieves increased sensitivity, easier calibration, and failure detection, enabling effective detection of a wide range of particle sizes and ensuring continuous operation by correlating counts between sensors and assigning different sensors for various size ranges.
Implementation Method 1
a sensor block and photo-amplifier sub-assembly
Implementation Method 2
photo-amplifier sub-assembly
Data Source
AI summary
An airborne, gas, or liquid particle sensor with multiple particle sensor blocks in a single particle counter. Each sensor would sample a portion of the incoming airstream, or possibly a separate airstream. The various counters could be used separately or in concert.