Double-excitation electromagnetic flow meter based on photoelectrical coupling
An electromagnetic flowmeter, electromagnetic flow technology, applied in the application of electromagnetic flowmeter to detect fluid flow, volume/mass flow generated by electromagnetic effect, etc., can solve the high impedance measurement electrode loop interference, difficult to maintain dual excitation electromagnetic flowmeter flow measurement Features, high performance and other issues, to achieve the effect of easy operation and control
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[0039] Example 2: see figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Image 6 , Figure 7 with Figure 8 This embodiment is the same as the first embodiment. The special feature is that the dual excitation electromagnetic flowmeter based on photoelectric coupling is characterized in that the excitation potential E composed of the excitation potential Ea and the excitation potential Eb is adopted figure 1 , figure 2 or image 3 One of the methods is connected in series in the connection loop between the two measuring electrode terminals of the electromagnetic flow sensor 1 and the two input terminals of the measuring amplifier 2:
[0040] (a). figure 1 The excitation potential Ea and the excitation potential Eb described in the above are both connected in series in one of the two connection paths between the two measuring electrode terminals of the electromagnetic flow sensor 1 and the two input terminals of the measuring amplifier 2;
[0041] (b). figure 2 The medium exc...
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