Online Measuring Of Grain Flowrates and Its Measurement Sensitivities with Pitch and Roll Angles

A complete calibration test stand was constructed and instrumented to examine the effect of varying pitch and roll positions on the measurement errors of a microwave solid type flow sensor. Results indicated that measurement errors ranging from 2.50% to 6.82% and 1.80% to 8.86% were obtained by the changing of chute pitch (descending and ascending) and roll angle positions from 1.5° to 4.5°, respectively. Greater measurement errors were found at the low screw auger conveyor speed range. However, the magnitude of errors is within the acceptable margin for any typical wet paddy land topography.

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Calibration and Accuracy Determination of a Microwave Type Sensor for Measuring Grain Flow

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.931-932.1592 ◽

2014 ◽

Vol 931-932 ◽

pp. 1592-1596

Author(s):

Renny Eka Putri ◽

Azmi Yahya ◽

Nor Maria Adam ◽

Samsuzana Abd Aziz ◽

Tajudeen Abiodun Ishola

Keyword(s):

Real Time ◽

Pitch Angle ◽

Measurement Errors ◽

Measurement Accuracy ◽

Evaluation Study ◽

Flow Sensor ◽

Roll Angle ◽

Flow Measurements ◽

Solid Flow ◽

Grain Flow

Impact type grain flow sensor for crop yield monitoring is known to have problem of some thrown grain by the elevator conveyor in a combine not hitting the sensing impact plate. New technology of microwave solid flow sensor was used to solve the problem of impact-type sensor. A calibration stand with its instrumentation systems to stimulate the actual operation of the clean grain auger in a rice combine had been designed and constructed in this study for the purpose of conducting the calibration and evaluation study of the sensor. Two different solid flow sensor orientations and three different solid flow sensor extrusions were investigated in order to find the best positioning of the sensor on the chute for the measurement. Results from the conducted tests indicates that the best sensor positioning is on totally flat ground at 180o orientation and 8 cm extrusion of the chute cross section (R2=0.9400). Then, the solid flow sensor was tested at seven chute pitch angle positions (i.e-4.5o, -3.0o, -1.5o, 0o, +1.5o, + 3.0o, and +4.5 o), seven chute roll angle positions (i.e-4.5o,-3.0o, -1.5 o, 0o, +1.5o, +3.0 o, and +4.5o). Finally, accuracy tests undertaken to compare the real time measurements against the average flow measurements. ANOVA test shows that both pitch angle and roll angle positions have significant effects on the measurement accuracy of the sensor. The measurement errors increased with increasing roll angles and increasing pitch angle. Conclusively, this conducted laboratory study was able to quantify the measurement accuracy of the SWR Solid Flow sensor for real-time measurement of grain flow under a simulated laboratory rice combine test set-up.

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A catheter-type flow sensor for measurement of aspirated- and inspired-air characteristics in the bronchial region

Journal of Micromechanics and Microengineering ◽

10.1088/0960-1317/19/10/105027 ◽

2009 ◽

Vol 19 (10) ◽

pp. 105027 ◽

Cited By ~ 39

Author(s):

M Shikida ◽

J Naito ◽

T Yokota ◽

T Kawabe ◽

Y Hayashi ◽

...

Keyword(s):

Flow Sensor ◽

Type Flow

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A Low-Cost Centrifugal Force Type Flow Sensor for Measuring the Flow Rate of a Fluid Through a Pipeline

IEEE Sensors Journal ◽

10.1109/jsen.2007.897963 ◽

2007 ◽

Vol 7 (8) ◽

pp. 1206-1210 ◽

Cited By ~ 1

Author(s):

Satish Chandra Bera

Keyword(s):

Centrifugal Force ◽

Flow Rate ◽

Low Cost ◽

Flow Sensor ◽

Type Flow

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Eddy-current probe type flow sensor for liquid metal service

10.2172/4433293 ◽

1973 ◽

Author(s):

Keyword(s):

Liquid Metal ◽

Eddy Current ◽

Flow Sensor ◽

Probe Type ◽

Type Flow

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Micro-Machined Stent-Type Flow Sensor for Evaluation of Nasal Respiration

2009 IEEE 22nd International Conference on Micro Electro Mechanical Systems ◽

10.1109/memsys.2009.4805427 ◽

2009 ◽

Cited By ~ 1

Author(s):

T. Yokota ◽

J. Naito ◽

M. Shikida ◽

K. Sato

Keyword(s):

Flow Sensor ◽

Stent Type ◽

Type Flow

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Four Pad Tilting Pad Bearing Design and Application for Multistage Axial Compressors

Journal of Lubrication Technology ◽

10.1115/1.3253278 ◽

1982 ◽

Vol 104 (4) ◽

pp. 523-529 ◽

Cited By ~ 8

Author(s):

J. C. Nicholas ◽

R. G. Kirk

Keyword(s):

Test Stand ◽

Operating Speed ◽

Design Studies ◽

Peak Response ◽

Analytical Design ◽

Rotor Systems ◽

Axial Compressors ◽

Tilting Pad ◽

Speed Range ◽

Bearing Design

The advantages of operating multistage axial compressors on 4 pad tilting pad bearings are discussed and compared to other fixed bore and tilting pad bearing designs. These advantages include operation free of subsynchronous vibration and, with between pivot loading, placement of peak response speeds well outside of the operating speed range. Examples of analytical design studies of 3 actual rotor systems are presented and discussed to illustrate the design recommendations. Test stand results are also included for 3 axial compressors to help substantiate the analytical results.

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