Industry new

The development of electromagnetic flowmeters is becoming more and more intelligent.

With the increasing popularity of intelligent electromagnetic flowmeters in flow measurement, the technical development of electromagnetic flowmeters is mainly to develop in several aspects such as accuracy and scope of application. Mastering the development of these aspects can improve the efficiency of electromagnetic flowmeters.

Thus, the coil core size can be reduced and the sensor length can be shortened. Therefore, compared with the earlier electromagnetic flowmeter, the current electromagnetic flowmeter can realize the miniaturization of the product, and the integrated structure of the sensor and the converter can effectively reduce the manufacturing cost of the flowmeter.

Early AC excitation electromagnetic flowmeters have a large eddy current phenomenon. In order to obtain high measurement accuracy, a strong induced electromotive force needs to be generated, and an electromagnetic flowmeter using low frequency rectangular wave excitation is compared with an AC excitation type electromagnetic flowmeter. Energy consumption is greatly reduced.

With the advancement of the times, the development of electronic technology and the development of new insulating materials and magnetic materials with the development of high technology, electromagnetic flowmeter manufacturers have developed a variety of new electromagnetic flowmeters to meet the corrosive and polluting properties of the measured medium. The problem.

Electromagnetic flowmeter converters use advanced integrated operational amplifiers to dramatically reduce device noise. Using the digital processing method, the converter of the analog circuit can greatly improve the measurement accuracy of the electromagnetic flowmeter, and the error of the electromagnetic flowmeter is greatly reduced.

Due to the action of electromagnetic induction, an eddy current is generated, and a secondary magnetic flux is formed. The excitation of the low-frequency rectangular wave can effectively reduce the generation of the secondary magnetic flux, and thus the zero point is relatively stable.

The frequency of the rectangular wave magnetic field is an integral multiple of the power frequency. When the electromagnetic flowmeter signal is sampled, its average value is zero, which can eliminate the influence of power frequency serial-mode interference, modulation of dual-frequency excitation, programmable control excitation, and measurement of solid-liquid two. When the slurry flow rate is used, the influence of low-frequency electrochemical noise on the electrode can be reduced, and the reliability of the sensor signal is improved. The application of a single-chip computer in the converter can make full use of the advantages of the computer with information storage, time-sharing processing, calculation and control capabilities, and can easily realize two-way measurement of traffic, empty pipe measurement, multi-range automatic switching, man-machine dialogue, Auxiliary functions such as communication with the host computer and self-diagnosis. The electromagnetic flux sensor of the magnetic field of the distributed magnetic field is more uniformly distributed. The length of the excitation coil of the magnetic field is greatly shortened; the improvement of the signal-to-noise ratio of the low-frequency excitation can greatly reduce the magnetic induction intensity.

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