CN104280079A - Electromagnetic flowmeter with partially-filled-pipe measurement function - Google Patents
Electromagnetic flowmeter with partially-filled-pipe measurement function Download PDFInfo
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- CN104280079A CN104280079A CN201410562132.3A CN201410562132A CN104280079A CN 104280079 A CN104280079 A CN 104280079A CN 201410562132 A CN201410562132 A CN 201410562132A CN 104280079 A CN104280079 A CN 104280079A
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- electromagnetic flowmeter
- circuit
- electrodes
- full pipe
- magnetizing coil
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Abstract
The invention discloses an electromagnetic flowmeter with a partially-filled-pipe measurement function. The electromagnetic flowmeter comprises an upper exciting coil arranged on the upper side of a pipe body, a lower exciting coil arranged on the lower side of the pipe body, at least three electrodes symmetrical with one another arranged on the left side and the right side of the pipe body respectively and a coil symmetrical with the upper exciting coil and the lower exciting coil and identical in specifications; the upper exciting coil covers the pipe body to form a sectored angle ranging from 30 degrees to 45 degrees, current signals generated to the electrodes are different, a signal discrimination circuit is arranged in a transverter so as to discriminate the signals acquired from the electrodes, and flow of a pipe partially filled can be acquired. The electromagnetic flowmeter is high in measurement precision and good in stability; a shielding case is arranged on the electrodes, so that electromagnetic interference is lowered, and precision of the electromagnetic flowmeter is further improved.
Description
Technical field
The present invention relates to a kind of can non-full pipe measure electromagnetic flowmeter.
Background technology
Traditional electrical magnetic flowmeter can only carry out flow measurement for full-section pipe-flow, and on-the-spot actual condition is comparatively complicated, mostly is non-full pipe situation, and especially in large diameter pipeline occasions such as municipal water supply and environment protection sewage process, non-full pipe operating mode is more general.In these application scenarios due to can not accurate-metering flow, cause very large economic loss to enterprise.
For solving the bottleneck that traditional electrical magnetic flowmeter is measured in non-full pipe occasion, each producer has released one after another non-full-tube electromagnetic flow meter, and measuring channel inner fluid height and then obtain circulation area while its universal principle is measurement flow velocity, both are multiplied and obtain flow.This kind of type structure is comparatively complicated in manufacturing process, relates to multiple detection and surveys element, add the potential leakage point of instrument itself and potential maintenance, in addition, the precision of liquid level measuring system is lower, affects the overall accuracy of flowmeter, is generally only 2 class precisions.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of can non-full pipe measure electromagnetic flowmeter.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of can non-full pipe measure electromagnetic flowmeter, comprise and be arranged on upper magnetizing coil on the upside of body, be arranged on lower magnetizing coil on the downside of body, at least three symmetrical electrodes are respectively arranged with in the body left and right sides, described upper magnetizing coil and lower magnetizing coil are the coil of symmetrical same size, described upper magnetizing coil cover body segment angle be 30 °-45 °.
Described segment angle is 41 °.
Described body one-sided configuration has seven electrodes.
Described electrode is external to a converter by signal wire, and described electrode is provided with shielding case.
Signal discrimination circuit is provided with in described converter.
Signal processing circuit is provided with 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.
The invention has the beneficial effects as follows: a kind of can non-full pipe measure electromagnetic flowmeter, comprise the upper magnetizing coil be arranged on the upside of body, be arranged on the lower magnetizing coil on the downside of body, at least three symmetrical electrodes are respectively arranged with in the body left and right sides, described upper magnetizing coil and lower magnetizing coil are the coil of symmetrical same size, described upper magnetizing coil cover body segment angle be 30 °-45 °, different fluid level, the current signal produced each electrode is different, signal discrimination circuit is provided with in converter, to differentiate the signal obtained from electrode, and differentiate, flow during non-full pipe can be obtained, accuracy of detection is high, good stability, and electrode is provided with shielding case, reduce electromagnetic interference (EMI), the precision of further raising 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 can non-full pipe measure electromagnetic flowmeter, comprise the upper magnetizing coil 2 be arranged on the upside of body 1, be arranged on the lower magnetizing coil 3 on the downside of body 1, symmetrical at least three electrodes 4 are respectively arranged with in body 1 left and right sides, described upper magnetizing coil 2 and lower magnetizing coil 3 are the coil of symmetrical same size, described upper magnetizing coil 2 cover body 1 segment angle a be 30 °-45 °, through actual, the result obtained in detection is set, described segment angle a is 41 °, when described body 1 one-sided configuration has seven electrodes 4, accuracy of detection reaches optimum state, meet request for utilization, and cost control is ideal, described electrode 4 is external to converter by signal wire, different fluid level, the current signal produced each electrode is different, signal discrimination circuit is provided with in converter, to differentiate the signal obtained from electrode, and differentiate, flow during non-full pipe can be obtained, accuracy of detection is high, good stability, and electrode is provided with shielding case, reduce electromagnetic interference (EMI), the precision of further raising electromagnetic flowmeter.
As preferably, signal processing circuit is provided with in described converter, described signal processing circuit comprises signal amplification circuit, filtering circuit, feedback circuit, signal exports successively after signal amplification circuit, filtering circuit, feedback circuit, and namely filtering circuit carries out filtering to the output of signal amplification circuit, reduces 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.
In the present embodiment, described signal discrimination circuit, signal amplification circuit, filtering circuit, feedback circuit are all the circuit comparatively commonly used, and are not described further at this.
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. one kind can non-full pipe measure electromagnetic flowmeter, it is characterized in that: comprise the upper magnetizing coil (2) being arranged on body (1) upside, the lower magnetizing coil (3) being arranged on body (1) downside, symmetrical at least three electrodes (4) are respectively arranged with in body (1) left and right sides, described upper magnetizing coil (2) and lower magnetizing coil (3) be the coil of the same size of symmetry, described upper magnetizing coil (2) cover body (1) segment angle (a) be 30 °-45 °.
2. according to claim 1 a kind of can non-full pipe measure electromagnetic flowmeter, it is characterized in that: described segment angle (a) is 41 °.
3. according to claim 2 a kind of can non-full pipe measure electromagnetic flowmeter, it is characterized in that: described body (1) one-sided configuration has seven electrodes (4).
4. according to claim 1 a kind of can non-full pipe measure electromagnetic flowmeter, it is characterized in that: described electrode (4) is external to a converter by signal wire, (4) are provided with shielding case to described electrode.
5. according to claim 4 a kind of can non-full pipe measure electromagnetic flowmeter, it is characterized in that: in described converter, be provided with signal discrimination circuit.
6. according to claim 4 a kind of can non-full pipe measure electromagnetic flowmeter, it is characterized in that: in described converter, be provided with signal processing circuit.
7. according to claim 4 a kind of can non-full pipe measure electromagnetic flowmeter, 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410562132.3A CN104280079A (en) | 2014-10-22 | 2014-10-22 | Electromagnetic flowmeter with partially-filled-pipe measurement function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410562132.3A CN104280079A (en) | 2014-10-22 | 2014-10-22 | Electromagnetic flowmeter with partially-filled-pipe measurement function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104280079A true CN104280079A (en) | 2015-01-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410562132.3A Pending CN104280079A (en) | 2014-10-22 | 2014-10-22 | Electromagnetic flowmeter with partially-filled-pipe measurement function |
Country Status (1)
| Country | Link |
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| CN (1) | CN104280079A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1492217A (en) * | 2002-09-19 | 2004-04-28 | 株式会社山武 | Electromagnetic flow meter |
| CN1928507A (en) * | 2006-07-21 | 2007-03-14 | 上海大学 | Electromagnetic flow sensor for measuring non-full pipe flow and method for measurement |
| CN101303247A (en) * | 2008-07-01 | 2008-11-12 | 上海大学 | Non-full pipe flow measurement method of conductive fluid |
| CN101929883A (en) * | 2009-12-14 | 2010-12-29 | 浙江大学 | Method for measuring flow of conductive fluid in non-full pipe by using electromagnetic flow meter |
| CN202255489U (en) * | 2011-09-16 | 2012-05-30 | 开封威利流量仪表有限公司 | Sensor excitation coil with high protection grade |
| CN102654411A (en) * | 2011-03-02 | 2012-09-05 | 上海威尔泰工业自动化股份有限公司 | Electromagnetic flowmeter |
| CN204241049U (en) * | 2014-10-22 | 2015-04-01 | 大连美天三有电子仪表有限公司 | A kind of electromagnetic flowmeter realizing measurement non-full pipe |
-
2014
- 2014-10-22 CN CN201410562132.3A patent/CN104280079A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1492217A (en) * | 2002-09-19 | 2004-04-28 | 株式会社山武 | Electromagnetic flow meter |
| CN1928507A (en) * | 2006-07-21 | 2007-03-14 | 上海大学 | Electromagnetic flow sensor for measuring non-full pipe flow and method for measurement |
| CN101303247A (en) * | 2008-07-01 | 2008-11-12 | 上海大学 | Non-full pipe flow measurement method of conductive fluid |
| CN101929883A (en) * | 2009-12-14 | 2010-12-29 | 浙江大学 | Method for measuring flow of conductive fluid in non-full pipe by using electromagnetic flow meter |
| CN102654411A (en) * | 2011-03-02 | 2012-09-05 | 上海威尔泰工业自动化股份有限公司 | Electromagnetic flowmeter |
| CN202255489U (en) * | 2011-09-16 | 2012-05-30 | 开封威利流量仪表有限公司 | Sensor excitation coil with high protection grade |
| CN204241049U (en) * | 2014-10-22 | 2015-04-01 | 大连美天三有电子仪表有限公司 | A kind of electromagnetic flowmeter realizing measurement non-full pipe |
Non-Patent Citations (2)
| Title |
|---|
| 刘传玺 等: "《自动检测技术》", 31 March 2012 * |
| 蔡武昌 应启夏: "《新型流量检测仪表》", 31 January 2006 * |
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Legal Events
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| C10 | Entry into substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150114 |
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| WD01 | Invention patent application deemed withdrawn after publication |