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

Inactive Publication Date: 2012-08-08
SHANGHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the relatively complex electrical isolation and new excitation generation circuit, it is easy to introduce additional interference in the high-impedance measurement electrode circuit
This makes it difficult to maintain the high performance of the flow measurement characteristics of the dual excitation electromagnetic flowmeter and its additional functions

Method used

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  • Double-excitation electromagnetic flow meter based on photoelectrical coupling
  • Double-excitation electromagnetic flow meter based on photoelectrical coupling
  • Double-excitation electromagnetic flow meter based on photoelectrical coupling

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Embodiment 2

[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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Abstract

The invention provides a double-excitation electromagnetic flow meter based on photoelectrical coupling, which comprises an electromagnetic flow sensor and a measurement amplifier, wherein a photoelectric transducer comprises a photoelectric transducer A and a photoelectric transducer B; and excitation potential generated by the photoelectric transducer is connected in series with a connecting circuit of two measurement electrode ends of the electromagnetic flow sensor and two input ends of the measurement amplifier so as to enable applied excitation potential to be convenient for operation and control and not to lower the input impedance of the measurement amplifier. The invention ensures the flow measurement with high performance under the excitation of a magnetic field, can monitor fluid impedance between two ends of an electrode under the excitation of additional potential, and has the detection functions of measuring electrode pollution, empty measurement pipe, fluid impedance change and the like.

Description

Technical field [0001] The invention relates to a dual excitation electromagnetic flowmeter based on photoelectric coupling. Specifically, it relates to a dual excitation electromagnetic flowmeter which adopts an additional excitation potential generated by a photoelectric converter. The basic principle of the electromagnetic flowmeter is that there is a pipe with a diameter of D in the electromagnetic flow sensor sensor to allow the measured fluid F to pass, and under the excitation magnetic field B in the electromagnetic flow sensor, the fluid F passes through the pipe with a diameter of D at a flow rate V to make the measuring electrode From the above, the induced potential E0=K0×D×B×V, K0 is the coefficient of the electromagnetic flow sensor, and the electromagnetic flowmeter obtains the value of fluid F and the flow velocity V by measuring the induced potential E0. With the widespread application of electromagnetic flowmeters, in addition to the measurement of fluid flow r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F1/58
Inventor 李斌邢斌沈天飞陈源
Owner SHANGHAI UNIV
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