Device based on measurement of capacitance pore plate flow and measurement of electromagnetic flow
A technology of orifice flow and electromagnetic flow, applied in the direction of measuring flow/mass flow, measuring device, liquid/fluid solid measurement, etc., can solve problems such as unreliable measurement results and liquid leakage, and achieve low power consumption and high accuracy , to ensure the effect of measurement accuracy
Inactive Publication Date: 2013-06-26
CHINA JILIANG UNIV
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Problems solved by technology
Differential pressure method orifice flowmeter is widely used because of its simple design and low cost, but this kind of flowmeter with differential pressure measurement device will suffer from liquid leakage, change of elastic properties of diaphragm material, corrosive influence of process fluid Errors due to other reasons make the measurement results unreliable
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[0024] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0025] Such as Figure 5 As shown, the present invention includes excitation circuit, electromagnetic flow measurement sensor, electromagnetic signal processing circuit, msp430f5438 single-chip microcomputer, output display circuit, communication debugging circuit; msp430f5438 single-chip microcomputer is respectively connected with excitation circuit, output display circuit and communication debugging circuit; electromagnetic flow measurement sensor The excitation coil is connected with the excitation circuit, a pair of electrodes of the electromagnetic flow measuring sensor is connected with the electromagnetic signal processing circuit, and the output end of the electromagnetic signal processing circuit is connected with the A / D conversion channel of the single chip microcomputer. In addition, it also includes an oscillating drive circuit, a capaciti...
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The invention discloses a device based on measurement of capacitance pore plate flow and measurement of electromagnetic flow. The device comprises an exciter circuit, an electromagnetic flow measuring transducer, an electromagnetic signal processing circuit, a 430 singlechip, an output display circuit and a communication debugging circuit. The device further comprises an oscillation driving circuit, a capacitance pore plate flow measuring sensor and a capacitance pore plate signal processing circuit. The oscillation driving circuit is connected with an input end of the capacitance pore plate signal processing circuit through the capacitance pore plate flow measuring sensor, and an output end of the capacitance pore plate signal processing circuit is connected with an analog to digital (A / D) switching channel of the singlechip. A capacitance pore plate flow measuring system is added on the basis of a traditional electromagnetic flowmeter, characteristics of high precision and high accuracy of electromagnetic flow measuring to conducting liquid volume flow measuring are kept, and meanwhile, the defect that measuring precision is low under the conditions of low flow speed and small flow is overcome.
Description
technical field [0001] The invention relates to a flow measurement device, in particular to a device based on capacitive orifice flow measurement and electromagnetic flow measurement. Background technique [0002] Based on the many advantages of electromagnetic flowmeters such as: large measurement range; measurement is not affected by changes in fluid density, temperature, pressure, viscosity, Reynolds number, etc.; good corrosion resistance; linear measurement principle, high measurement accuracy; flow velocity distribution Low requirements. At present, electromagnetic flowmeters with electromagnetic flow measurement technology are mainly used for volume flow measurement of conductive liquids. [0003] Such as figure 1 As shown, the electromagnetic flow measurement is based on Faraday's law of electromagnetic induction, the conductive medium flows in the pipeline, cuts the magnetic force line, and generates an induced electromotive force perpendicular to the magnetic fie...
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Login to View More IPC IPC(8): G01F1/34G01F1/66
Inventor 刘铁军张光明
Owner CHINA JILIANG UNIV