Replaceable Orifice Plate Airflow Measurement for Wide Flow Ranges
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Solution Overview
Problem
Existing measurement devices struggle to measure airflow volume and ventilation resistance across various ranges, particularly in devices like servers, information base stations, and wind-blowing apparatuses, due to limitations in nozzle size and pressure differential accuracy, leading to poor versatility and accuracy issues.
Innovation Solution
A measurement device with a casing containing a first air duct, straightening grid, opening plate, and pressure sensors, featuring a replaceable opening plate and assistant fan, which allows for adjustable opening sizes and positions, enabling accurate measurement of airflow volume and ventilation resistance across different ranges by calculating differential pressures and airflow volumes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed nozzle size is used in the measurement device, then the device structure is simple, but the measurement accuracy deteriorates when measuring airflow volumes outside the predetermined range
Solution Approach 1:
The patent applies the dynamics principle by making the opening plate replaceable rather than fixed. The opening plate can be swapped to change the opening area, allowing the measurement device to adapt to different airflow volume ranges. This dynamic configuration enables the device to maintain measurement accuracy across various ranges without requiring a completely different device for each range.
Solution Approach 2:
The patent applies segmentation by dividing the opening plate into a separate, replaceable component. The opening plate is detached from the main device body and can be independently exchanged. This segmentation allows users to select appropriate opening plates for different measurement ranges, improving versatility while keeping the base device structure relatively simple.
2Adaptability or versatility
If the opening plate is made replaceable to improve versatility, then measurement accuracy across various ranges is improved, but the device complexity increases
Solution Approach 1:
The patent applies universality by designing a standardized opening plate interface that can accommodate different opening plate types. The base device structure remains universal and can work with multiple opening plate configurations. This allows a single device platform to serve multiple measurement ranges and applications, improving versatility without proportionally increasing device complexity.
3Measurement precision
If pressure sensors are positioned to measure differential pressure accurately, then measurement precision is improved, but the device complexity increases due to multiple sensors and positioning requirements
Solution Approach 1:
The patent applies merging by combining multiple pressure sensing functions into an integrated sensor arrangement. The first and second pressure sensors are positioned to simultaneously measure pressures at different locations, and the controller integrates these measurements to calculate differential pressure. This merging approach achieves accurate differential pressure measurement while reducing the overall complexity compared to using separate dedicated sensors for each pressure point.
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 achieves high versatility and accurate measurement of airflow volumes and ventilation resistances across various ranges, ensuring downsizing and weight reduction while maintaining measurement precision.
Implementation Method 1
pressure sensors that measure a first pressure, a second pressure, and a third pressure, the first pressure being air pressure from the air inlet to the straightening grid, the second pressure being air pressure in the first chamber, the third pressure being air pressure in the second chamber
Implementation Method 2
a straightening grid provided in the first air duct, the straightening grid being configured to straighten the air taken from the air inlet
Data Source
AI summary
A measurement device includes: a casing that includes a first air duct with an air inlet; a straightening grid; a first chamber; an opening plate including an opening; a second chamber; pressure sensors configured to measure a first pressure, a second pressure, and a third pressure, the first pressure being air pressure from the air inlet to the straightening grid, the second pressure being air pressure in the first chamber, the third pressure being air pressure in the second chamber; a specific opening configured to allow the opening plate to be replaceable; an open/close portion configured to open and close the specific opening; and a duct forming a second air duct between the measurement device and a measurement target.