[PDF] Top 20 Furrow flow measurement accuracy

... The sensitivity of flow measurement uncertainty,., to head or time reading uncertainty is proportional to the ratio of' the device discharge equation exponent to the reading.. Furrow flo[r] ... See full document

... high accuracy and turndown ratio, and virtually no pressure ...for measurement of crudes, including the heavy crudes found in oil shale and oil ...and flow computers with full diagnostic suites that ... See full document

... Many of the above studies yielded velocity vector fields also, but their accuracy is highly questionable. The severity became apparent from a study by Thurow et al [13], who compared results obtained by a light ... See full document

... and measurement in air has been used with a correction factor ...calculate flow rate. Slower-flowing stylets require longer measurement times and so are exposed to greater evaporation bringing about ... See full document

... the accuracy and precision of VCC with the accuracy and precision of flow cytometry and hematology (F&H) for the measurement of the absolute numbers of CD4 and CD8 T cells in the whole ... See full document

... velocity measurement technique that has been used since the ...The accuracy, flexibility and versatility offered by PIV systems have made them extremely valuable tools for flow ...calibration, ... See full document

... Vehicle alongside field. This approach restricts the areas of crop that can be moni- tored, since the vehicle must traverse alongside the edge of the field, parallel with the furrows. Compared to the other two ... See full document

... According to the USBR Water Measurement Manual (USBR, 1981), for fully contracted operation, "the distance from the orifice edges to the bounding surfaces, both on the upstream and[r] ... See full document

... A further use of a flow measuring system is to control a process. In closed loop regulatory control, there are several instances where the prime consideration is repeatability rather than accuracy. This is ... See full document

... The aim of this project was to validate the Bos (1989) combined entrance and exit loss coefficient for small long pipe siphon flow used in over-bank furrow irrigation. To achieve this aim, research was ... See full document

... the accuracy of the absolute perfusion measurement by using Q2TIPS has not been fully established, especially in pathologic condi- ...blood flow value could be ... See full document

... A companion paper (Trout, 1986) determined, through laboratory calibration, that (a) flow through small circular orifices was not affected by boundaries, caused by the furrow perimeter, [r] ... See full document

... the flow meter is still within calibration without extracting the meter from ...ready flow sensor (which can be used with any number of flow meters) and an additional benchmark calibration document ... See full document

... In addition to our standard products, in close cooperation with our customers we have developed application-specifi c special solutions for fl uidic measurement technology. The associated high-performance ... See full document

... common furrow openers, double-disc opener is most widely used, because the double-disc opener has a good working stability at high speed, without stubble blockage, and has small soil adhesion and disturbance [24] ... See full document

... position signals. The load angle measurement for detecting the rotor position based on a photoelectric sensor mounted on the stator is proposed in [12]. Air gap sensor for detection of rotor position was proposed ... See full document

... accuracy achieved is not to the desired research goal, yield maps were produced with satisfactory detail to make agronomic management decisions. The reliability of the sugar cane yield mapping system under field ... See full document

... better accuracy than manually measuring the part and designing the part from ...the accuracy of the 3D scanner is known to be lower compared to contact ...digitizer accuracy by using Taguchi ...the ... See full document

... of measurement, the TDR measured moisture values are burdened with correlation imperfections between the measured values, ...beginning ACCURACY OF SOIL MOISTURE MEASUREMENT BY TDR ... See full document

... The measurement accuracy of thickness was investigated when the tilting angle of detection laser to the cold steel surface was changed (Fig. 19). The tilt angle was controlled to either one of 0, 3 and 5°. ... See full document