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Industry Information
Electromagnetic flowmeter has no mechanical inertia response and can measure instantaneous pulsating flow
2012-3-6 9:31:51

是一种根据法拉第电磁感应定律来测量管内导电介质体积流量的感应式仪表,采用单片机嵌入式技术,实现数字励磁,同时在电磁流量计上采用CAN现场总线。 The electromagnetic flowmeter is an inductive instrument that measures the volumetric flow rate of the conductive medium in the tube according to Faraday's law of electromagnetic induction. It uses a single-chip embedded technology to achieve digital excitation. At the same time, the CAN fieldbus is used on the electromagnetic flowmeter. It is the first of its kind in China and its technology has reached the domestic leading level.
Electromagnetic Flowmeter Electromagnetic flowmeter is specially designed for water metering trade of water supply enterprises. It has the ability to prevent electromagnetic flowmeter (plug-in) water, anti-corrosion, anti-interference and anti-lightning. The electromagnetic flowmeter is specially designed with a Chinese LCD display with a wide backlight temperature range. It is complete and practical, intuitive to display, and easy to use, which can reduce the inconvenience caused by the English menus of other electromagnetic flowmeters. In addition, our exclusive design of 4-6 multi-electrode structure further guarantees measurement accuracy and does not require a grounding ring at any time, reducing the volume of the instrument and the trouble of installation and maintenance. While satisfying the on-site display, the electromagnetic flowmeter can also output 4-20mA current signals for recording, adjustment and control. It has been widely used in industrial technology and management departments such as chemical industry, environmental protection, metallurgy, medicine, papermaking, water supply and drainage, etc. . An electromagnetic flowmeter that uses the principle of electromagnetic induction to measure the flow rate of a medium fluid. It applies a magnetic field on both sides of the pipe, and the measured medium flows through the pipe to cut the magnetic field lines, which generates induced potentials on the two detection electrodes, the size of which is proportional to the speed of the fluid. It can be used to measure the flow of various suspended substances, gasification vapors and viscous substances such as acid, alkali, salt solution, coal water slurry, mineral pulp, mortar plaster, pulp, resin, rubber latex, synthetic fiber pulp and photosensitive latex. The electromagnetic flowmeter has good sealing performance and can also be used in tap water and underground water channel systems. And the measurement process is not in contact with the fluid, suitable for the pharmaceutical, biochemical and food industries. This flow meter also measures blood flow. Its range ratio is about 100: 1, and the accuracy is generally 1%. Since this sensor must maintain a certain proportional relationship between the resistance in the pipeline and the impedance of the measurement circuit, it is difficult to manufacture. Difficulties begin to occur when the conductivity of the measured medium is about 10 ohm · cm, and principle difficulties arise when the conductivity is lower. When the electrical conductivity is 10 ohm · cm, the "demarcation line" between the conductive medium and the dielectric is reached, and the thermal noise level increases significantly as the internal resistance increases. 详细资料电磁流量计是高精度、高可靠和使用寿命长的流量仪表,所以在设计产品结构、选材、制定工艺、生产装配和出厂测试等过程中每一个环节我们都非常细致讲究,还自行设计了一套中国最先进的,专用于电磁流量计的生产设备和流量实流标定装置,从而在软件和硬件上都能切实保证产品长期的高质量。 Details of electromagnetic flowmeters Electromagnetic flowmeters are high-precision, high-reliability and long-life flow meters. Therefore, we have paid great attention to each link in the process of designing product structure, selecting materials, formulating processes, manufacturing and assembly, and factory testing. We also designed a set of China's most advanced production equipment and flow real-time calibration device dedicated to electromagnetic flowmeters, so as to ensure the long-term high quality of the product in both software and hardware. The electromagnetic flowmeter is specially designed with a Chinese LCD display with a wide backlight temperature range. It is complete and practical, intuitive to display, and easy to use, which can reduce the inconvenience caused by the English menus of other electromagnetic flowmeters. In addition, we have an exclusive design of a 4-6 multi-electrode structure, which further ensures the measurement accuracy and does not require a grounding ring at any time, reducing the trouble of the instrument volume and installation and maintenance. Features of this paragraph: ▲ No moving parts, no choke parts, measurement There is almost no additional pressure loss. ▲ The measurement result has nothing to do with the liquid velocity distribution, fluid pressure, temperature, density, viscosity and other physical parameters, but only to the conductivity of the liquid. ▲ At the scene, the range can be modified online according to the actual needs of the user. ▲ High-definition backlit LCD display, full Chinese menu operation, easy to use, simple operation, easy to learn and understand. ▲ High reliability with SMD device and surface mount (SMT circuit). ▲ Using 16-bit embedded microprocessor, fast operation speed, high precision, programmable frequency and low frequency rectangular wave excitation, which improves the stability of flow measurement and low power consumption. ▲ Full digital processing, strong anti-interference ability, reliable measurement, high accuracy, and flow measurement range up to 150: 1 The device can display the forward cumulative amount and the difference cumulative amount respectively. It has an internal power-down clock that can record 16 times of power-down time. It has digital communication signal outputs such as RS485, RS232, Hart, and Modbus. 的工作原理是基于法拉第电磁感应定律。 ▲ The working principle of the electromagnetic flowmeter with self-inspection and self-introduction function is based on Faraday's law of electromagnetic induction. In the electromagnetic flowmeter, the conductive medium in the measuring tube is equivalent to the conductive metal rod in the Faraday test, and the two electromagnetic coils at the upper and lower ends generate a constant magnetic field. When a conductive medium flows, an induced voltage is generated. The two electrodes inside the pipe measure the induced voltage produced. The measuring pipe is electromagnetically isolated from the fluid and the measuring electrode by a non-conductive inner lining (rubber, Teflon, etc.). The flowmeter is composed of a primary device and a secondary device. According to the combination of the primary device and the secondary device, the flowmeter can be divided into a split type and an integrated type; the flowmeter is mainly used to measure the volume flow of the conductive liquid. (Excerpt: JJG 1033-2007 electromagnetic flowmeter verification regulations)