Electromagnetic flowmeter with high immunity to disturbances

　　Electromagnetic flowmeter is a typical flow detection instrument that emerged and was widely used in the mid-twentieth century due to the rapid progress of electrical technology. It uses the basic principle of electromagnetic induction and is mainly used to detect the flow of conductive or low-conductive fluids. However, traditional electromagnetic flowmeters have shortcomings such as interference factors affecting measurement accuracy.

　　Based on the basic theory of electromagnetic flowmeter, this paper deeply analyzes the factors that affect the accuracy of electromagnetic flowmeter, and puts forward targeted anti-interference measures, and designs a high-precision and low-power electromagnetic flowmeter based on this. First, the basic principle of electromagnetic flowmeter is explained, its basic structure is analyzed, and the factors that affect the accuracy of electromagnetic flowmeter are studied in detail. The generation mechanism and countermeasures of various interference factors are analyzed, and the influence of excitation technology on accuracy is analyzed. Based on these factors that affect the accuracy of electromagnetic flowmeter, targeted anti-interference measures are proposed.

　　Secondly, starting from the entire system of the electromagnetic flowmeter measuring device with high anti-interference performance, the structure of the electromagnetic flowmeter with high anti-interference performance is designed, including its main control chip, excitation coil, clock module, detection electrode and A/D converter design; and the main parameters of its sensor are analyzed; its system circuit is designed, including the system overall circuit, excitation current source circuit, signal conditioning circuit, communication module and DSP peripheral interface circuit design, and on this basis, its anti-interference hardware is designed.

　　Third, the software development environment is briefly analyzed, and the software modular design is explained, including the system main program design, flowmeter module design, timing interrupt module design and communication module design, and the software anti-interference design is carried out on this basis. Finally, in order to verify the correctness and effect of the design, the designed electromagnetic flowmeter system is experimentally analyzed. On the premise of successful indoor circuit debugging, an experimental platform is built, and some circuit debugging results are analyzed and summarized. The performance of the flowmeter is tested through a simple experimental device; the entire flowmeter system is evaluated according to the experimental test data, and the experimental results that are basically consistent with the theory are obtained, which verifies the correctness of the entire electromagnetic flowmeter system design with high anti-interference performance, and realizes the acquisition and processing of flow signals.

　　The above is the "Explanation of Electromagnetic Flowmeter with High Anti-interference Performance" shared by the electromagnetic flowmeter manufacturer. Thank you for watching. If you have any questions, you can consult online or leave us a message. We will answer you wholeheartedly.