| 摘要 |
A non-contact solids flow meter for measuring solid particulate flow is comprised of a flow tube, a sensor, and an indicator. The product enters the flow tube at one end and flows downward by gravity past the sensor and then exits the flow tube at the bottom. The sensor is placed in a sensor tube at an angle to the flow of particulate solids. As the product passes the sensor signal (low microwave energy), this energy upon contacting the particulates undergoes a Doppler shift which is detected by the sensor. The width of the sensor beam has to be at least the diameter of the flow tube so that it covers the entire cross-sectional area of the flow tube. In this manner, all particulat e materials flowing through the flow tube come in contact with the beam and are thus reflected. The instrument is calibrated and algorithms determined from the calibration to cause the indicator to provide a best fit function over the output range of the indicator.
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