Pulse Scope Particle Counter Software Analysis
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Solution Overview
Problem
Conventional particle counters only provide a simple particle count and fail to offer detailed information about particles in the atmosphere, lacking discrimination between pulses based on width and shape, which limits their ability to analyze and report on individual pulse data.
Innovation Solution
A system and method that captures and logs detailed parametric information on individual pulses, including time of arrival, peak pulse height, pulse width, and pulse envelope, allowing for more advanced analysis and reporting, and enabling the use of multiple counters or bins based on pulse characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional particle counters use simple hardware gating for pulse discrimination, then device complexity is reduced and ease of operation is improved, but measurement precision and information completeness deteriorate
Solution Approach 1:
The patent replaces hardware-based pulse discrimination (electronic/mechanical system) with software-based pulse analysis. The microcontroller captures raw pulse waveforms and performs digital analysis of pulse width, height, and shape characteristics, eliminating the need for complex hardware gating circuits while enabling more precise particle classification and noise filtering.
2Measurement precision
If particle counters capture detailed parametric information on individual pulses, then measurement precision and information completeness are improved, but device complexity and data processing requirements worsen
Solution Approach 1:
The microcontroller serves multiple functions: it controls the particle counting operation, captures pulse waveforms from the sensor, analyzes pulse parameters (width, height, shape), classifies particles into bins, and manages data storage. This multi-functional approach consolidates what would otherwise require separate dedicated circuits for each function, reducing overall device complexity while enabling detailed pulse analysis.
3Speed
If conventional counters use hardware-based pulse discrimination, then processing speed is improved, but measurement precision and noise filtering capability worsen
Solution Approach 1:
The system captures the complete pulse waveform at its raw state immediately when a particle passes through the sensor, before any discrimination or filtering is applied. This preliminary capture of the full signal allows subsequent software analysis to extract multiple parameters (pulse width, peak height, area, shape) and apply sophisticated noise filtering algorithms that can distinguish true particle signals from noise based on temporal and morphological characteristics.
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 detailed analysis and reporting of particle data, allowing for the discrimination of pulse shapes and noise filtering, improving signal-to-noise performance and enabling the identification of contaminants, thus enhancing manufacturing yields and problem resolution.
Implementation Method 1
a beam present between the laser diode (101) and the beam stop (102) scatters light (103) as particles cross that beam
Implementation Method 2
The tiny current in the photo-diode is then pre-amplified, usually by a trans-impedance amplifier (105)
Data Source
AI summary
An airborne, gas, or liquid particle sensor with an on-board data acquisition system that can be used to capture detailed particle pulse information. The information can be used both for on-board analysis and reporting as well as off-line analysis and reporting.