CN204202662U - A kind of electromagnetic flowmeter based on measuring system - Google Patents
A kind of electromagnetic flowmeter based on measuring system Download PDFInfo
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- CN204202662U CN204202662U CN201420609730.7U CN201420609730U CN204202662U CN 204202662 U CN204202662 U CN 204202662U CN 201420609730 U CN201420609730 U CN 201420609730U CN 204202662 U CN204202662 U CN 204202662U
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Abstract
The utility model discloses a kind of electromagnetic flowmeter based on measuring system, comprise: magnetizing coil, magnetizer, electrode, signal processing circuit, A/D converter, flow value calculation element, flow value output unit, the excitation cycle of magnetizer of the present utility model at least two provides rectangle exciting curent to described magnetizing coil, and multiple excitation cycle selectivity is changed, the initial flow signal of multiple magnet excitation frequency can be obtained, effectively can eliminate the measuring error because induced noise causes, and the zero point of not carrying out causing the flowing of stopping fluid adjusting and improves measuring accuracy, and reliability is high.
Description
Technical field
The utility model relates to a kind of electromagnetic flowmeter based on measuring system.
Background technology
Weighting function of electromagnetic flowmeter is an imaginary physical quantity, and its physical meaning is: during electromagnetic flowmeter work, measure each point produces in pipeline section space induction electromotive force to output voltage between electrode make the size contributed.Scientists has made clear and definite definition to the numerical values recited of certain some weighting function in measuring pipe of electromagnetic flow meter section space, that is: when unitary current flows through two electrodes, during composition current loop, and the size of this current density.Therefore, also have many documents that weighting function is referred to as empty electric current, and the measuring system of electromagnetic flowmeter is namely for by this Current calculation flow, but current measuring system is difficult to the measuring error eliminated because induced noise causes, reliability is low.
Summary of the invention
In order to overcome the deficiencies in the prior art, the utility model provides a kind of electromagnetic flowmeter based on measuring system.
The utility model solves the technical scheme that its technical matters adopts:
Based on an electromagnetic flowmeter for measuring system, comprising:
Be arranged on the magnetizing coil measuring the upper and lower both sides of pipe fitting, this magnetizing coil provides magnetic field to described measuring tube inside;
Magnetizer, this magnetizer is connected with magnetizing coil, and provides rectangle exciting curent with the excitation cycle of at least two to described magnetizing coil;
Electrode, this electrode is arranged on measures the pipe fitting left and right sides, the electric current produced for detecting flow cutting magnetic line in measurement pipe fitting;
Signal processing circuit, this signal processing circuit and Electrode connection, for the treatment of the current signal detected by electrode;
A/D converter, this A/D converter is connected with signal processing circuit, for being digital signal by analog-signal transitions;
Flow value calculation element, this flow value calculation element is connected with A/D converter, when being used for producing electromotive force in excitation cycle when between described electrode often kind described, according to the described electromotive force extrapolation flow signal produced during described excitation cycle, to obtain the flow value signal that will obtain when described excitation cycle is infinity;
Flow value output unit, this flow value output unit and flow value calculation element, be used for exporting the described flow value signal obtained by means of described flow value calculation element by extrapolation method.
Described flow value calculation element carries out extrapolation computing according to the linear function of excitation cycle.
Described rectangle exciting curent is selectivity conversion in three excitation cycles, and wherein said flow value calculation element obtains flow value signal from the flow signal of described three excitation cycles.
Described signal processing circuit comprises amplifying circuit, filtering circuit, and signal exports successively after amplifying circuit, filtering circuit.
Described flow value calculation element is a microprocessor.
Described flow value output unit is a display.
The beneficial effects of the utility model are: the excitation cycle of magnetizer of the present utility model at least two provides rectangle exciting curent to described magnetizing coil, and multiple excitation cycle selectivity is changed, the initial flow signal of multiple magnet excitation frequency can be obtained, effectively can eliminate the measuring error because induced noise causes, and the zero point of not carrying out causing the flowing of stopping fluid adjusting and improves measuring accuracy, and reliability is high.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 is structure principle chart of the present utility model.
Embodiment
With reference to the structure principle chart that Fig. 1, Fig. 1 are the utility model specific embodiments, as shown in the figure, a kind of electromagnetic flowmeter based on measuring system, comprising:
Be arranged on the magnetizing coil 2 measuring the upper and lower both sides of pipe fitting, this magnetizing coil 2 provides magnetic field to described measuring tube inside;
Magnetizer, this magnetizer is connected with magnetizing coil, and provides rectangle exciting curent with the excitation cycle of at least two to described magnetizing coil;
Electrode 1, this electrode 1 is arranged on measures the pipe fitting left and right sides, the electric current produced for detecting flow cutting magnetic line in measurement pipe fitting;
Signal processing circuit, this signal processing circuit is connected with electrode 1, for the treatment of the current signal detected by electrode 1;
A/D converter, this A/D converter is connected with signal processing circuit, for being digital signal by analog-signal transitions;
Flow value calculation element, this flow value calculation element is connected with A/D converter, when being used for producing electromotive force in excitation cycle when between described electrode often kind described, according to the described electromotive force extrapolation flow signal produced during described excitation cycle, to obtain the flow value signal that will obtain when described excitation cycle is infinity;
Flow value output unit, this flow value output unit and flow value calculation element, be used for exporting the described flow value signal obtained by means of described flow value calculation element by extrapolation method.
As preferably, described rectangle exciting curent is selectivity conversion in three excitation cycles, wherein said flow value calculation element obtains flow value signal from the flow signal of described three excitation cycles, flow value calculation element carries out extrapolation computing according to the linear function of excitation cycle, due to the initial flow signal of three magnet excitation frequencies can be obtained, effectively can eliminate the measuring error because induced noise causes, and the zero point of not carrying out causing the flowing of stopping fluid adjusting and improves measuring accuracy, and reliability is high.
Further, described signal processing circuit comprises amplifying circuit, filtering circuit, signal exports successively after amplifying circuit, filtering 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 flow value calculation element is a microprocessor, and described flow value output unit is a display, and described microprocessor is preferably the MSP430 single-chip microcomputer of Hong Kong TI company or Dutch PHILIPS company 80C552 single-chip microcomputer.
Above better enforcement of the present utility model is illustrated; certainly; the utility model 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 domain of the present utility model.
Claims (1)
1. based on an electromagnetic flowmeter for measuring system, it is characterized in that: comprising:
Be arranged on the magnetizing coil (2) measuring the upper and lower both sides of pipe fitting, this magnetizing coil (2) provides magnetic field to described measuring tube inside;
Magnetizer, this magnetizer is connected with magnetizing coil, and provides rectangle exciting curent with the excitation cycle of at least two to described magnetizing coil;
Electrode (1), this electrode (1) is arranged on measures the pipe fitting left and right sides, the electric current produced for detecting flow cutting magnetic line in measurement pipe fitting;
Signal processing circuit, this signal processing circuit is connected with electrode (1), for the treatment of the current signal detected by electrode (1);
A/D converter, this A/D converter is connected with signal processing circuit, for being digital signal by analog-signal transitions;
Flow value calculation element, this flow value calculation element is connected with A/D converter, when being used for producing electromotive force in excitation cycle when between described electrode often kind described, according to the described electromotive force extrapolation flow signal produced during described excitation cycle, to obtain the flow value signal that will obtain when described excitation cycle is infinity;
Flow value output unit, this flow value output unit and flow value calculation element, be used for exporting the described flow value signal obtained by means of described flow value calculation element by extrapolation method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420609730.7U CN204202662U (en) | 2014-10-22 | 2014-10-22 | A kind of electromagnetic flowmeter based on measuring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420609730.7U CN204202662U (en) | 2014-10-22 | 2014-10-22 | A kind of electromagnetic flowmeter based on measuring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204202662U true CN204202662U (en) | 2015-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420609730.7U Expired - Fee Related CN204202662U (en) | 2014-10-22 | 2014-10-22 | A kind of electromagnetic flowmeter based on measuring system |
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| CN (1) | CN204202662U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104266693A (en) * | 2014-10-21 | 2015-01-07 | 中山欧麦克仪器设备有限公司 | Electromagnetic flow meter measurement system |
-
2014
- 2014-10-22 CN CN201420609730.7U patent/CN204202662U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104266693A (en) * | 2014-10-21 | 2015-01-07 | 中山欧麦克仪器设备有限公司 | Electromagnetic flow meter measurement system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Electromagnetic flowmeter based on measurement system Effective date of registration: 20151126 Granted publication date: 20150311 Pledgee: Bank of China Limited by Share Ltd. Zhongshan branch Pledgor: ZHONGSHAN OMAC INSTRUMENT AND EQUIPMENT Co.,Ltd. Registration number: 2015990001053 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150311 Termination date: 20211022 |
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| CF01 | Termination of patent right due to non-payment of annual fee |