USU ECE 5320 - Ultrasonic Doppler Flow Sensors

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ECE5320 Mechatronics Assignment#01: Literature Survey on Sensors and Actuators Topic: Ultrasonic Doppler Flow SensorsOutlineReference listTo explore further (survival pointers of web references etc)Major applicationsBasic Working PrincipleBasic Working Principle (cont.)Slide 8Basic OperationTypical Application ConfigurationMajor SpecificationsTypical Sensor ExamplesLimitationsCostHow to Pick the Right SensorHow to pick the right sensor (cont.)Where to BuyECE5320 MechatronicsAssignment#01: Literature Survey on Sensors and Actuators Assignment#01: Literature Survey on Sensors and Actuators Topic: Ultrasonic Doppler Flow SensorsPrepared by:Camron [email protected]. of Electrical and Computer Engineering Utah State University3/9/200701/13/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-2Outline –Reference list–To probe further–Major applications–Basic working principle illustrated–A typical sample configuration in application (application notes)–Major specifications–Limitations–And many more relevant issues in applications (such as, how to choose, cost information, where to buy etc.)01/13/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-3Reference list•http://www.nexsens.com/pdf/manuals/sontekargonaut.pdf•http://www.cidra.com/iss/technology/index.html•http://www.omega.com/toc_asp/frameset.html?book=Green&file=ULTRASONIC_FLOW_REF•http://www.aquametrix.com/data/dataDFM-IV.pdf•http://www.instrumentsdirect.com/technology/Ultrasonic-Doppler?gclid=CJvVstmY6IoCFQi8YAodeQq7mQ•http://ucce.ucdavis.edu/files/filelibrary/5049/640.pdf01/13/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-4To explore further (survival pointers of web references etc) •http://www.nexsens.com/•http://www.isa.org/InTechTemplate.cfm?Section=Article_Index1&template=/ContentManagement/ContentDisplay.cfm&ContentID=3318201/13/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-5Major applications •River and water way flow velocity measurement.•Oil and gas industry.•Water and wastewater treatment.•Food and beverage industry.http://pages.ripco.net/~jwn/rock.jpghttp://www.alaskastock.com/Alaska_Pipeline_Photos.asphttp://ga.water.usgs.gov/edu/pictures/wastewaterplant.jpghttp://travel.webshots.com/photo/1076194657042961721DkGxiDBasic Working PrincipleHeard an ambulance go by recently? Remember how the siren's pitch changed as the vehicle raced towards, then away from you? First the pitch became higher, then lower. Originally discovered by the Austrian mathematician and physicist, Christian Doppler, this change in pitch results from a shift in the frequency of the sound waves, as illustrated in the picture on the right.01/13/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-6Basic Working Principle (cont.)The basic principle behind ultrasonic Doppler flow sensors is this frequency shift, known as the Doppler Effect, of an ultrasonic wave as it is reflected by discontinuities in the fluid.01/13/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-7Ultrasonic sound is transmitted across the fluid path. Discontinuities such as air bubbles or small solids reflect the sound waves with a slightly different frequency. This frequency shift is directly proportional to the rate of flow of the liquid.01/13/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-8Basic OperationAs illustrated in the figure on the previous slide, a typical system uses a transmitter and a transducer. The transducer, usually on the exterior of a pipe, is fed a high frequency signal from the transmitter. The transducer then transmits this signal through the wall of the pipe into the flowing liquid. The transmitter then measures the difference betweens its input and output signals converting this difference into electronic pulses which are then used to calculate the flow rate of the fluid.01/13/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-9Typical Application ConfigurationTypical applications usually involve a network of flow sensors working together. A sensor network in this application results in much more accurate and reliable flow monitoring system.01/13/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-10http://www.cidra.com/iss/technology/index.htmlhttp://www.cidra.com/iss/technology/index.htmlMajor Specifications•Non-contacting. Sensor has no effect on actual fluid flow.•For most sensors, gas bubbles or solid particles in fluid must be larger than 100 microns in size and must be 75 ppm in concentration.•Piping cannot have air pockets. This means no concrete or wood piping.•Flow rate range: 0.25 to 40 ft/sec.•Power consumption: 12VDC, 100-130VAC, 50-60Hz, 5W max.•Temperature range: -10°F to 200°F01/13/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-11Typical Sensor Examples01/13/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-12Measure flow from outside a pipe. The Greyline DFM-IV is ideal for "difficult liquids" that would damage regular flow meters - wastewater, slurries, sludge, chemicals, viscous liquids and abrasives. There is no obstruction to flow and no pressure drop. The standard, strap-on ultrasonic sensor fits any pipe 1/2" (12.5 mm) Inside Diameter or larger. The electronics/display enclosure can be mounted nearby.http://www.aquametrix.com/prod_doppler.htmlDesigned for mounting on the bottom of a river channel or lake, the Argonaut-XR is an advanced Doppler sonar for 3D water velocity measurement. Three-beam transducer for measuring 3D water velocity. Additionally, the Argonaut-XR never requires calibration and can reliably collect data up to 22 meters away from the sensor. All the electronics are housed in a low-profile (15cm) Delrin pressure case (200m max. depth) with base mounting plate.http://www.nexsens.com/products/sontek_1axr-20750.htmLimitations•Not suitable for clean liquids. Sensor requires air bubbles or particles in liquid in order to sense flow rate.•Cannot be installed on insulated piping. Insulation affects the ultrasonic signal.01/13/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-13Cost•$795 for a basic clamp on flow sensor.•$4995 for a heavy duty portable flow sensor.•Prices can be closer to $10,000 for open-channel flow sensors.•Sensor rental is


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USU ECE 5320 - Ultrasonic Doppler Flow Sensors

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