Particle Measuring Device Cleaning Nozzle for Accurate Sizing
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Solution Overview
Problem
Existing particle measuring devices struggle to accurately measure particle size distribution due to particles adhering to the observation window, which are consistently detected and interfere with continuous measurement.
Innovation Solution
A particle measuring device equipped with a cleaning nozzle that discharges a cleaning liquid different from the measured fluid onto the observation window, effectively removing adhering particles and ensuring accurate measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If continuous measurement is performed without cleaning, then measurement efficiency is improved, but particles adhere to the observation window causing measurement inaccuracy
Solution Approach 1:
The cleaning nozzle periodically discharges cleaning liquid toward the observation window at predetermined intervals during continuous measurement. This periodic cleaning action removes adhering particles while maintaining continuous measurement operation, thereby resolving the contradiction between measurement efficiency and accuracy.
2Reliability
If cleaning liquid is discharged frequently, then particle adhesion is reduced, but fluid consumption increases
Solution Approach 1:
The control unit determines whether to discharge cleaning liquid based on measurement results. When particle adhesion is detected affecting measurement accuracy, the control unit triggers cleaning liquid discharge. This feedback-based control ensures cleaning is performed only when necessary, maintaining measurement accuracy while minimizing cleaning liquid consumption.
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 device successfully removes adhering particles from the observation window, enabling accurate measurement of particle size and distribution during continuous operation.
Implementation Method 1
a cleaning nozzle 126 that discharges a cleaning liquid toward the observation window 124
Data Source
AI summary
To provide a particle measuring device capable of removing particles adhering to an observation window for capturing an image of the particles and measuring an accurate particle size distribution. A particle measuring device that image-recognizes particles contained in a fluid to be measured and measures a physical quantity of the particles includes: a sample holding region that holds a sample containing the particles; an observation window disposed on a wall surface of the sample holding region; and a cleaning nozzle configured to discharge a cleaning liquid toward the observation window, in which the cleaning liquid is different from the fluid to be measured.