Handheld Flow Calibrator

Handheld Flow Calibrator

Progress ReportMAE 126B | Project E5

May 31st, 2013

Jonathan Ma, Yung Nguyen, Mario Zuniga presented by

Project Advisor | Craig CorriganCourse Advisor | Jan Kleissl

Project E5 | Handheld Flow Calibrator

Project Objectives & Progress Summary

PROJECT DESCRIPTION


OBJECTIVES• Develop a cost-effective and highly accurate low flow

calibrator that utilizes two separated methods to measure mass flow rate and volumetric flow rate.

“JYMeter”

JYMeter

Abs. Pressure

Absolute Pressure Sensor

Density

Temperature, Humidity,

Volumetric Flow Rate

Differential Pressure

Mass Flow Rate

Volumetric Flow Rate

(from DP) * density

Mass Flow Rate Sensor

Project Tasks


1. Research

• Volumetric flow methods

• Mass flow methods

2. Calculation & Engineering

Design

3. Hardware & Fabrications

4. Calibrate the calibrator

• Estimate the appropriate size materials• Understanding resolutions and analog signals

communication

1. Integrate DP Sensor, Mass flow, Humidity

2. Integrate Temp & Abs. Pressure Sensor

3. Oversampling Programming

4. Conditioning the tubes5. Finding appropriate

Length6. Put everything into

photoboard

1L/Min Flow 1. Perform Procedures 1.1 & 1.2

(Basic Calibration)1. DP2. Mass Flow3. Temperature, Humidity4. Abs. Pressure

Research| Numerical Analysis


VOLUMETRIC FLOW RATE : DIFFERENTIAL PRESSURE METHOD

Laminar Flow Element

= Poiseuille Equation

Source: www.alicat.com

±𝐾 obtain calibration equation from calibration experiment

Design | Numerical Analysis


VOLUMETRIC FLOW RATE : DIFFERENTIAL PRESSURE METHOD

= Poiseuille Equation

Source: www.alicat.com

Low Flow Rate (1 L/min) Calculation – Single Tube

Higher Flow Rate (10 L/min) Calculation – LFE Model

Research |Numerical Analysis


MASS FLOW METHOD: CONSTANT TEMPERATURE DIFFERENTIAL

Source: www.absoluteastronomy.com

}

m* (mass flow rate)

Mass Flow MeterÞ No calculationÞ Mainly Calibrations

Prototyping| Fabrication Progress


From Midterm Report| Initial Concept Design

Initial Concept Design



Final Protoboard Design



A Closer Look

Prototyping | Fabrication Progress


SOFTWARE : OVERSAMPLING

Displays:• Average of 50 readings for noise reduction• Average of entire run for data analysisUsing Method of Weighted Averages

Experiment | Calibration Experimental Set-Up


Experiment | Calibration Set-Up


Experiment| Preliminary Tube Set-Up


Experiment | Preliminary Calibrations


Volumetric Flow Rate: Calibration For Differential Pressure Sensor

Source: I&EC Fundamentals, Vol 6 , No.4

0 1 2 30

200

400

600

800

1000

1200

f(x) = 376.947938202583 x + 131.280303445715R² = 0.997567026545887

f(x) = 362.526364308444 xR² = 1

DP: Calibration with Straight 17cm Tapered VFR Theoretical Linear (VFR Theoretical) Experimental Data with GilibratorLinear (Experimental Data with Gilibrator)



Mass Flow Rate: Calibrating Mass Flow Sensor


0 200 400 600 800 1000 12000

0.5

1

1.5

2

2.5

3

f(x) = 0.0000000030936502 x³ − 0.00000705204 x² + 0.0059584493 x + 0.50051273R² = 0.999991079931622

f(x) = 0.0000000035994261 x³ − 0.000007474651 x² + 0.0058983385 x + 0.4964060701R² = 0.999652633109191

Procedure 1.1 | Mass Flow Rate Sensor Cal-ibration

JYM Polynomial (JYM) DataSheetPolynomial (DataSheet)

Volumetric Flow Rate (ccm)

Volta

ge (V

)



Mass Flow Rate: Calibrating Mass Flow Sensor


Summary of Findings During Calibration• Offset due to the pump, not as efficient.• Temperature of the air changes.

1 2 3 4 5 6 70

200

400

600

800

1000

1200

Mass Flow Rate CalibrationJYMeter Gilibrator

Trial Set

Flow

Rat

e

Project Management & Work Schedule


Week Projected Tasks from the Beginning Tasks

1 Microcontrollers & Volumetric & Mass Flow Research

Microcontrollers & Volumetric & Mass Flow Research

2 Setting up the Arduino & Sensor Characteristic Research

Setting up the Arduino & Sensor Characteristic Research

3 Numerical Analysis of Device Components (non-sensor related)

Numerical Analysis of Device Components (non-sensor related)

4 Initial Concept Design & Sensor Integration

Initial Concept Design & Sensor Integration

5 Prototyping Calibrator for Experimental Data Input/Output Programming

Prototyping ((Received Basic Arduino Stuff + Windsesnor), Stock Room Shopping Trip #1

6 Functionality Testing Prototyping (Waiting for Craig or order DP&Mass flow sensor)

7 Enclosure Integration Prototyping / Craig asked for re-design of 10L/min.

8 Competitive Comparison with Gilibrator

Prototyping (Waiting for McMaster Order), Stock Room Shopping Trip #2, Craig gave us Gilibrator, Began Calibration Test Run

9 Altitude Testing Prototyping (Waiting for Sparkfun & Digikey final order), Calibrated DP & Mass Flow, Fabrication All Connections

10 Evaluation Finish prototype + last calibration experiment + Enclosure

Remaining Project Tasks


1. Research

• Volumetric flow methods

• Mass flow methods

2. Calculation & Engineering

Design

3. Hardware & Fabrications

4. Calibrate the calibrator

• Estimate the appropriate size materials• Understanding resolutions and analog signals

communication

1. Integrate DP Sensor, Mass flow, Humidity

2. Integrate Temp & Abs. Pressure Sensor

3. Oversampling Programming

4. Conditioning the tubes5. Finding appropriate

Length6. Put everything into

photoboard

1L/Min Flow 1. Perform Procedures 1.1 & 1.2

(Basic Calibration)1. DP2. Mass Flow3. Temperature, Humidity4. Abs. Pressure

THE END. Questions?


AssignmentsResearch• Hardware & Components - Jonathan• Mass Flow Methods - Mario• Volumetric Flow Methods – YungPrototyping• Programming – Mario/Jonathan • Numerical Analysis – Yung• Circuit Set-Up – Mario/Jonathan • Fabrication – Team Calibration – Team • Gilibrator Operation• Data Analysis • Testing & Turning

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Handheld Flow Calibrator

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