Ultrasonic flowmeter principle
Posted by hw on May 26th, 2021
Many friends will now use ultrasonic flow meters, but many friends do not understand the principle of ultrasonic flow gauges before use, and I will introduce the principle of ultrasonic flow meter.
Level gauge is the most important sensor in traffic monitoring, which has a wide range of applications in sewage treatment, printing and dyeing and municipal water supply. However, a general flowmeter needs to be installed in a separate operating conditions, which is not easy to achieve under some working conditions, so today's protagonist-ultrasonic flowmeter should be born.
The ultrasonic flowmeter entered the domestic market, and was earliered by Dalian Sonyka Co.
Like the ultrasonic flowmeter, the electromagnetic flowmeter, it belongs to the unobstructed flow meter, which is suitable for traffic monitoring of most pure liquid, because it does not have to be broken, and the measurement is simple, it has become a solution to a large class of traffic monitoring. Strategies, especially in terms of large caliber flow measurement.
Ultrasonic flow meters are mainly divided into handheld, outer clamps and wall-mounted ultrasonic flow meters. The most important advantage of ultrasonic flowmeter is portable, easy to carry, and is convenient to install, and the range of traffic detection is also large, and the flow rate of multiple pipe calibers can be detected, not like a pipeline flowmeter, only limit The flow of a caliber is measured. It is necessary to accompany the shortcomings, the maximum disadvantage of the ultrasonic flowmeter is not as high as the accuracy of the pipeline flowmeter. However, the stable flow of fluid helps to measure stability, thereby ensuring measurement accuracy. The fluid in which the flow state confusion makes the measurement data instably or cannot be measured. When the tube greater than DN300 is measured, it is necessary to select an extended bracket. The pipeline diameter using an extended bracket measurement is not less than DN700. The extended bracket can be installed with V method and the Z method, generally recommending the Z method for installation, so signal strength is more.
The installation of the outer clamp sensor has V method and Z method.
DN15MM-200mm pipeline prioritizes V method, two sensors horizontally aligned in installation, in which the centerline is parallel to the pipe axis, and pay attention to the transmission direction to be opposite (two sensor directions). The V method has the characteristics of easy use and accurate measurement. For pipeline installation accuracy of less than DN50mm, please pay attention to signal strength, signal quality, and transmission time than these parameters.
DN200MM-6000mm pipeline prioritization Z method, the Z method can also be selected when the signal or signal quality is not detected in V method. When installing, the vertical distance between the two sensors along the direction of the pipe is equal to the mounting distance, and ensures that the two sensors can be on the same shaft surface, and pay attention to the transmission direction to be opposed (two sensor directions). Since the Z method is the direct delivery of ultrasonic waves in the medium propagation, the signal is not reflected, so the signal strength is attenuated. Therefore, the Z method has a higher signal strength, suitable for ultrasonic signal attenuating a large diameter, impurities or bubbles and fouling of pipelines.
About the Authorhw
Joined: June 6th, 2019
Articles Posted: 539
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