Ultra-low power consumption and high precision ultrasonic flow meter based on MSP430

火辣西米秀

Ultra-low power consumption and high precision ultrasonic flow meter based on MSP430 [Copy link]

As an important parameter in the field of industrial control, how to improve the accuracy of its measurement has always been one of the issues that industry insiders have been studying. Ultrasonic flowmeter was developed in the 1950s. It is a non-contact new type of flowmeter that measures the ultrasonic propagation time and then obtains the flow rate. Ultrasonic flowmeters are widely welcomed for their non-contact, wide range of applications, high accuracy, intelligence, low cost, and strong resistance to environmental influences. However, the design and development of domestic ultrasonic flowmeters has a considerable gap with foreign levels in terms of accuracy, rationality of circuit design, and stability. At present, the domestic high-end market is basically occupied by foreign products, which are relatively expensive. Domestic technicians are difficult to maintain them due to limited technical conditions.
Fixed displacement flowmeter:
referred to as PD flowmeter, the industry also calls it a volumetric flowmeter. It uses mechanical components to continuously divide the fluid passing through the measuring pipe section. The fluid drives the rotor to rotate and passes through the measuring pipe section of the flowmeter. In this process, the fluid is brought into a small space with the same unit volume, which is called a metering chamber. The metering chamber is repeatedly filled and discharged. Since the volume of the metering chamber is fixed, the total volume of the fluid can be obtained by measuring the rotation speed of the rotor. Compared with other types of flow meters, although the principle of this type of flow meter is relatively simple, it is the most accurate type of flow meter. Generally speaking, although fixed-displacement flow meters have high accuracy, they are complicated to install and are usually used in the flow measurement of high-viscosity and low-Reynolds number fluids. Fixed-displacement flow meters can also be subdivided according to their measuring elements, such as flow meters with oval gear rotors, scraper type, dual-rotor type, piston type, drum type and other conventional flow meters. In some special applications, there are also wet type and membrane type gas meters [13]. However, fixed-displacement flow meters have complex structures and short service lives. Since the impeller is in direct contact with the measured object, mechanical wear of the impeller and possible impurities in the water can easily cause the flow meter to fail.

火辣西米秀

火辣西米秀

火辣西米秀

火辣西米秀

火辣西米秀