CN104266697A - High-accuracy electromagnetic flow meter - Google Patents
High-accuracy electromagnetic flow meter Download PDFInfo
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- CN104266697A CN104266697A CN201410562108.XA CN201410562108A CN104266697A CN 104266697 A CN104266697 A CN 104266697A CN 201410562108 A CN201410562108 A CN 201410562108A CN 104266697 A CN104266697 A CN 104266697A
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- electromagnetic flowmeter
- circuit
- converter
- electrode
- precision electromagnetic
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Abstract
The invention discloses a high-accuracy electromagnetic flow meter which comprises a converter, an exciting coil and an electrode. The exciting coil is connected with an exciting drive circuit, the electrode is connected with the converter through a signal line, a shielding housing is arranged on the electrode, and the signal line is sleeved with a shielding sleeve. The electrode is provided with the shielding housing, the signal line is provided with the shielding sleeve, electromagnetic interference of the exciting coil on the electrode and the signal line to is reduced, and the accuracy of the electromagnetic flow meter is improved.
Description
Technical field
The present invention relates to a kind of high-precision electromagnetic flowmeter.
Background technology
Electromagnetic flowmeter passes through electromagnetic inductor, the volume signals of the conducting liquid flow through in pipeline is converted to electric signal, its transfer principle is according to Faraday's electromagnetic induction law, when conducting liquid is by magnetic field intercepts electromagnetic wire, to electromotive force be produced, be recorded the flow of conducting liquid by electromotive force.Electromagnetic Flow is in respect of many advantages, but the electromagnetism that the magnetizing coil of electromagnetic flowmeter produces can produce interference to electrode and signal wire, causes precision to reduce.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of high-precision electromagnetic flowmeter.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of high-precision electromagnetic flowmeter, comprise converter, magnetizing coil, electrode, described magnetizing coil is connected with excitatory driving circuit, and described electrode is connected with converter by signal wire, and described electrode is provided with shielding case.
Described signal wire is arranged with bell housing.
Signal processing circuit, microprocessor, A/D converter is included in described converter.
Described signal processing circuit comprises signal amplification circuit, filtering circuit, feedback circuit, and signal exports successively after signal amplification circuit, filtering circuit, feedback circuit.
Described microprocessor is the MSP430 single-chip microcomputer of Hong Kong TI company or Dutch PHILIPS company 80C552 single-chip microcomputer.
Described A/D converter is the ICL7135 monolithic dual integ ration ADC of American I NTERSIL company.
Described excitatory driving circuit is the direction of the switching exciting curent be made up of 4 power transistors, produces the circuit of the alternating magnetic field needed for micrometeor electromagnetic flowmeter.
The invention has the beneficial effects as follows: a kind of high-precision electromagnetic flowmeter, comprise converter, magnetizing coil, electrode, described magnetizing coil is connected with excitatory driving circuit, described electrode is connected with converter by signal wire, described electrode is provided with shielding case, and bell housing is arranged with on signal wire, reduce electromagnetic interference (EMI), improve the precision of electromagnetic flowmeter.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is structural representation of the present invention.
Embodiment
With reference to Fig. 1, Fig. 1 is the structural representation of the present invention's specific embodiment, as shown in the figure, a kind of high-precision electromagnetic flowmeter, it is characterized in that: comprise converter 1, magnetizing coil 2, electrode 3, described magnetizing coil 2 is connected with excitatory driving circuit, described electrode 3 is connected with converter 1 by signal wire 5, described electrode 3 is provided with shielding case 4, described signal wire 5 is arranged with bell housing, this shielding case 4, bell housing can adopt the structures such as metal knitted net or metal shell, the present invention passes through at electrode 3, signal wire 5 arranges shielding case 4 respectively, bell housing, reduce magnetizing coil 2 pairs of electrodes 3, the electromagnetic interference (EMI) of signal wire 5, improve the precision of electromagnetic flowmeter.
As preferably, signal processing circuit, microprocessor, A/D converter is included in described converter 1, described signal processing circuit comprises signal amplification circuit, filtering circuit, feedback circuit, signal exports successively after signal amplification circuit, filtering circuit, feedback circuit, namely filtering circuit carries out filtering to the output of signal amplification circuit, reduce the impact of interference noise, obtain the first-harmonic of flow velocity signal, and make the power of multiple interference noise reduce with bandwidth and reduce, improve signal to noise ratio (S/N ratio), improve the measuring accuracy of electromagnetic flowmeter.
As preferably, described microprocessor is the MSP430 single-chip microcomputer of Hong Kong TI company or Dutch PHILIPS company 80C552 single-chip microcomputer.
As preferably, described A/D converter is the ICL7135 monolithic dual integ ration ADC of American I NTERSIL company.
As preferably, described excitatory driving circuit is the direction of the switching exciting curent be made up of 4 power transistors, produces the circuit of the alternating magnetic field needed for micrometeor electromagnetic flowmeter.
Above better enforcement of the present invention is illustrated; certainly; the present invention can also adopt form different from the embodiment described above; the equivalent conversion that those of ordinary skill in the art do under the prerequisite without prejudice to spirit of the present invention or change accordingly, all should belong in protection scope of the present invention.
Claims (7)
1. a high-precision electromagnetic flowmeter, it is characterized in that: comprise converter (1), magnetizing coil (2), electrode (3), described magnetizing coil (2) is connected with excitatory driving circuit, described electrode (3) is connected with converter (1) by signal wire (5), described electrode (3) is provided with shielding case (4).
2. the high-precision electromagnetic flowmeter of one according to claim 1, is characterized in that: (5) are arranged with bell housing to described signal wire.
3. the high-precision electromagnetic flowmeter of one according to claim 1, is characterized in that: described converter includes signal processing circuit, microprocessor, A/D converter in (1).
4. the high-precision electromagnetic flowmeter of one according to claim 3, it is characterized in that: described signal processing circuit comprises signal amplification circuit, filtering circuit, feedback circuit, signal exports successively after signal amplification circuit, filtering circuit, feedback circuit.
5. the high-precision electromagnetic flowmeter of one according to claim 3, is characterized in that: described microprocessor is the MSP430 single-chip microcomputer of Hong Kong TI company or Dutch PHILIPS company 80C552 single-chip microcomputer.
6. the high-precision electromagnetic flowmeter of one according to claim 3, is characterized in that: described A/D converter is the ICL7135 monolithic dual integ ration ADC of American I NTERSIL company.
7. the high-precision electromagnetic flowmeter of one according to claim 3, is characterized in that: described excitatory driving circuit is the direction of the switching exciting curent be made up of 4 power transistors, produces the circuit of the alternating magnetic field needed for micrometeor electromagnetic flowmeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410562108.XA CN104266697A (en) | 2014-10-22 | 2014-10-22 | High-accuracy electromagnetic flow meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410562108.XA CN104266697A (en) | 2014-10-22 | 2014-10-22 | High-accuracy electromagnetic flow meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104266697A true CN104266697A (en) | 2015-01-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410562108.XA Pending CN104266697A (en) | 2014-10-22 | 2014-10-22 | High-accuracy electromagnetic flow meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104266697A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5621015A (en) * | 1979-07-30 | 1981-02-27 | Yokogawa Hokushin Electric Corp | Electromagnetic flow meter |
| CN2529206Y (en) * | 2002-03-15 | 2003-01-01 | 义乌市仪表有限公司 | Intelligent electromagnetic flowmeter |
| CN201107065Y (en) * | 2007-11-19 | 2008-08-27 | 张柏林 | Intelligent electromagnetic flow meter with recoding function without paper |
| CN101893465A (en) * | 2010-06-30 | 2010-11-24 | 合肥工业大学 | DSP-based electromagnetic flowmeter signal processing system |
| CN202903251U (en) * | 2012-10-16 | 2013-04-24 | 杭州振华仪表有限公司 | Intelligent electromagnetic flow meter with short message service module function |
| CN202994223U (en) * | 2012-12-30 | 2013-06-12 | 哈尔滨理工大学 | Micro-flow electromagnetic flow meter |
-
2014
- 2014-10-22 CN CN201410562108.XA patent/CN104266697A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5621015A (en) * | 1979-07-30 | 1981-02-27 | Yokogawa Hokushin Electric Corp | Electromagnetic flow meter |
| CN2529206Y (en) * | 2002-03-15 | 2003-01-01 | 义乌市仪表有限公司 | Intelligent electromagnetic flowmeter |
| CN201107065Y (en) * | 2007-11-19 | 2008-08-27 | 张柏林 | Intelligent electromagnetic flow meter with recoding function without paper |
| CN101893465A (en) * | 2010-06-30 | 2010-11-24 | 合肥工业大学 | DSP-based electromagnetic flowmeter signal processing system |
| CN202903251U (en) * | 2012-10-16 | 2013-04-24 | 杭州振华仪表有限公司 | Intelligent electromagnetic flow meter with short message service module function |
| CN202994223U (en) * | 2012-12-30 | 2013-06-12 | 哈尔滨理工大学 | Micro-flow electromagnetic flow meter |
Non-Patent Citations (1)
| Title |
|---|
| 刘传玺 等: "《自动检测技术》", 31 March 2012 * |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150107 |
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| WD01 | Invention patent application deemed withdrawn after publication |