Fuji Electric Ultrasonic Flowmeters

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Fuji ElectricUltrasonic Flowmeters
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Introduction

• Ultrasonic waves travel in the same manner as
  light or microwaves, however being elastic waves,
  they can propagate through any substance whether
  solid, liquid gases. And by utilizing the
  properties of ultrasonic waves clamp on
  flowmeters with unique feature of being able to
  measure fluid flow in the pipe externally was
  developed.
• In 1975, Fuji Electric introduced its first
  ultrasonic flowmeter and since then Fuji Electric
  USFMs have been very successfully in many
  applications both domestically and
  internationally.

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Contents

• Why use ultrasonic flowmeter?
• Who needs ultrasonic flowmeter?
• Whats unique in Fujis ultrasonic flowmeter?
• References
• Application notes

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1.1) Why use ultrasonic flowmeter?

• Benefits of A NON-INTRUSIVE sensor (CLAMP-ON type)

• Cost saving
• Easy maintenance (No moving parts)
• No pressure loss
• No plugging/clogging
• No corrosion
• No leakage

IT IS AN IDEAL SOLUTION TO PROBLEMS OF ORDINARY
INTRUSIVE/SPOOL PIECE TYPE OF FLOWMETERS. Differen
tial Pressure, Magnetic Flow, Turbine, Coriolis
Etc.
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1.2) Why use ultrasonic flowmeter?

• Wide operating conditions more than your
  expectations

Temperature -40 200 C Pipe Diameter
Ø13mm Ø6000mm Flow Velocity 0.3 32m/s
(High turndown ratio) Measured Fluid Sound
conductive fluids even with bubbles. Accuracy
0.5 1.0 Response Speed 0.5second
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1.3) Why use ultrasonic flowmeter?
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1.4) Why use ultrasonic flowmeter?
Cost Comparison
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2.1) Who needs ultrasonic flowmeter?

• Increasing demands by 11 per year through 2001
  (Forecasted by ARC, USA Advisory Group)

Government regulation requires reporting the
amount of discharged fluid from plants.
(Especially in Chemical Refining
Wastewater) Improving efficiency of plant
operation needs measuring flow rate of the
process which is not measured currently.
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2.2) Who needs ultrasonic flowmeter?

• Applications

• Pulp Paper
• Chemical Plants
• Power Plants Generating Facilities
• Water Service Sewage Treatment
• Semiconductor Manufacturing
• Plating Finishing Operations
• Food and Beverage Process
• Building Maintenance
• Pumping Efficiency
• Leakage Detection

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2.3) Who needs ultrasonic flowmeter?
Shipments Worldwide By Applications
Total 36,900 units sold in 1996
()
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2.4) Who needs ultrasonic flowmeter?
Shipments Worldwide by Industry since 1996
()
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3.1) Whats Unique in Fujis USFM

• Full Range Line-Up Of Fuji Electric USFM!

Fixed Type For Monitoring Control (Model
FLV/W) Fixed Multi-Channel (Model
FLH/W) Portable Type For Checking (Model
FLC/D) Open Channel (Model FLH/X) M-Flow
Low Cost Version (Model FLS/R)
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3.2) Whats Unique in Fujis USFM
Fuji Electrics USFM Family
Time Delta ?(FLV/W)
Portaflow-X (FLC/D)
Open Channel (FLH/X)
Multi Channel (FLH-3)
M-Flow
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3.3) Whats Unique in Fujis USFM

• Superior Measurement Performance by High Speed
  Digital Signal Processing
• (MPU DSP-Digital Signal Processor- Texas
  Instruments 32bit)

• Basic principle Transit time difference
• High accuracy (0.5) quick response (0.5second)
• Broad measuring range (0.332m/s)
• Real time auto temperature and pressure
  compensation
• Auto calculation for unknown sonic velocity
• Advanced anti-bubble measurement (Up to 12
  volume)

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3.4) Whats Unique in Fujis USFM
Basic Principle Transit Time Difference Type
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3.5) Whats Unique in Fujis USFM
Flow Profile Compensation

• Reynolds Number
• Non-dimensional figure to determine flow profile
• V x DRe ?
• Conversion factor of average velocity
• Turbulent flow (Re?5000)
• 2n1K n 2.1 log Re-1.9
  2n ,
• Laminar flow (Re?2300)
• 4 K 3

Enough straight pipe length should be taken so
that laminar flow will be well developed.
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3.6) Whats Unique in Fujis USFM
High accuracy (0.5) quick response (0.5second)

Comparison Test Data in Actual Flow
Pipe Ø80mm Pipe material SGP Range 02m/s
Accuracy( of rate)
Flow ()
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3.7) Whats Unique in Fujis USFM
Real time auto temperature pressure
compensation

• Principle Expression
• pD2 1 D ?T
• Q
• 4 K sin2?f (T0-t)2
• pD2 1 Cf ?T
• 4 K 2 sin?f T0-t
• (Cf Sound velocity in measured liquid)
• Compensation for liquid temperature pressure
  change
• Physical Phenomena
• Real time compensation (Applied For Patent)
  Calculation of propagation path and fluid
  sound velocity every output cycle

x
x
x
x
x
x
Fluid temperature pressure change
Change of Cf
Change of ?f t
Output change
Measured values T1 T2
Successive calculation of Cf , ?f t
Compensated output
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Sound Velocity of Water
Note In general, the dependence of sound
velocity to fluid temperature and/or pressure is
not well known except for a few liquids, such
as water and sea water.

• Sound Velocity Vs Water Temperature
• (Extracted From Steam Tables )

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3.8) Whats Unique in Fujis USFM
Real time Auto Temperature Pressure
Compensation
Comparison Test Data For Temperature Effects
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3.9) Whats Unique in Fujis USFM
Advanced Anti Bubble Measurement (Up to 12
Volume)

• Digital sampling of received signals
• Ultrasonic Oscillator ???? 2MHz For Small
  Sensor 1MHz For Large Sensor
• Sampling Rate ??????????16MHz
• Synchronized summation of received signals
• Normal propagation
• Interrupted propagation

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3.10) Whats Unique in Fujis USFM
Advanced Anti Bubble Measurement (Up to 12
Volume)
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Common Features Fujis USFM Series

• High accuracy quick response
• Compact lightweight
• Excellent air bubble resistance (Advanced ABM)
• Excellent temperature characteristics
• (New sound velocity measurement)
• OFFERED BY 32BIT DIGITAL SIGNAL PROCESSOR

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Wet Calibration

• 1. Weighing method
• 2. Volumetric method
• 3. Comparative method

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Wet Calibration
Weighing method

• Measure the Mass of Water Flowed into Primary
  Weighing Tank for certain period.
• Compare the Indication of USFM and Mass of Water.
  

Primary Volumetric Tank
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Wet Calibration
Volumetric method

• Measure the Level of Water Flowed into Primary
  Volumetric Tank for certain period.
• Compare the Indication of USF and Volume of
  Water.

Level Meter
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Wet Calibration
Comparative method

• Measure the Flow Rate by Primary Flowmeter for
  reference.
• Compare the Indication of USFM and the Primary
  Flowmeter

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Wet Calibration
Fujis USFM calibration (Upon request) by

• Volumetric method
• With 2.5 to 300mm Ø pipes (1 to 12 inch Ø)
• with primary tank inspected by Japanese
  Authority of Measurement.
• Comparative method
• With electromagnetic flowmeter calibrated within
  0.2 FS.
• For larger bore pipes than 300mm
• Dry calibration based on the wet calibration for
  300mm pipe according to Japanese Standard
  JEMIS032.

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References

• Australia
• Bangladesh
• Brunei
• Indonesia
• Japan
• Malaysia
• Myanmar
• New Zealand
• Pakistan
• Philippines
• Singapore
• Thailand
• Vietnam
• All countries

Please kindly click on the individual country to
view customers database.
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The End