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Measures to Eliminate or Reduce Noise Impact of Ultrasonic Flow Meters

by:Sincerity Group     2022-08-06
Abstract: The information on measures to eliminate or reduce the impact of noise on ultrasonic flowmeters is provided by excellent flowmeter and flowmeter manufacturers. Under the premise of fixed installation conditions, the ultrasonic flowmeter can improve the signal processing capability and diagnostic capability of the flowmeter itself, and can effectively reduce noise. Under normal circumstances, the measurement accuracy of the flowmeter is very important. In the case where the accuracy cannot be guaranteed, it should be. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following are the details of the measures to eliminate or reduce the impact of noise on ultrasonic flowmeters. Under the premise of fixed installation conditions, the ultrasonic flowmeter can improve the signal processing capability and diagnostic capability of the flowmeter itself, and can effectively reduce noise. Under normal circumstances, the measurement accuracy of the flowmeter is very important. When the accuracy cannot be guaranteed, using a flowmeter to measure the flow rate of a regulating valve that produces noise will inevitably produce wrong results. Therefore, improving the recognition and detection of sound pulses by the flowmeter, and at the same time improving the filtering ability of the signal, can improve the accuracy of the measurement. In order to reduce noise interference, it is advisable to install the flow meter upstream of the regulating valve, the advantage is that the pressure is higher, the signal is stronger, and the noise will not be amplified. Lengthening the straight pipes upstream and downstream of the flowmeter and installing isolation equipment between the flowmeter and the noise source will reduce noise. However, the length of the straight pipe section may require multiple pipe diameters to reduce noise interference, so it is more convenient and effective to install isolation equipment. Experiments have shown that filters, heat exchangers and turbine equipment are good noise reduction equipment. The ultrasonic flowmeter elbow and blind tee can also reduce noise. The best way is to install a blind tee, and the noise will be reflected back after the fluid passes through the blind tee. The method of sharing the pressure drop with two valves can also reduce noise generation, but this method is usually more expensive. The noise reduction effect of the ultrasonic noise canceler is remarkable. The noise canceler is to use a single composite small reflection device, foam or some devices with viscous, elastic and absorption properties with the same wavelength as the flowmeter to achieve the purpose of eliminating noise. Tests have shown that this approach can reduce noise by 30%. The noise canceller can be installed directly downstream of the flowmeter, flanged, and will not affect the accuracy of the flowmeter. Ultrasonic noise cancellers usually suffer from clogging and some pressure drop, so some advantages are lost. However, in some cases, for example, the pressure drop of the noise suppressor is negligible compared to the noise caused by the large pressure drop of the regulating valve. Ultrasonic flowmeters can use noise cancellers to reduce noise when space is limited such as offshore platforms. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Measures to Eliminate or Reduce Noise Influence on Ultrasonic Flow Meters'
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