CN204313899U - A kind of electromagnetic flowmeter - Google Patents
A kind of electromagnetic flowmeter Download PDFInfo
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- CN204313899U CN204313899U CN201520019747.1U CN201520019747U CN204313899U CN 204313899 U CN204313899 U CN 204313899U CN 201520019747 U CN201520019747 U CN 201520019747U CN 204313899 U CN204313899 U CN 204313899U
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- housing
- sensor
- electromagnetic flowmeter
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- gauge head
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Abstract
The utility model relates to a kind of electromagnetic flowmeter, belongs to electromagnetic flowmeter equipment technical field.Technical scheme is: comprise housing (1), ring flange (2), sensor (3), become and send and display gauge head (4), indicator gauge (5), circuit board (6) and electrode (7), the two ends of housing (1) are respectively equipped with ring flange (2), the probe of sensor (3) is provided with in housing (1), electrode (7) is connected with the probe of sensor (3), change send and display gauge head (4) is fixed on housing (1), indicator gauge (5) and circuit board (6) are separately fixed at change and send and on display gauge head (4), housing is also provided with field coil in (1).The beneficial effects of the utility model are: structure is simple, accurately can measure the fluid flow of low conductivity, overcome application measured by current flux meter deficiency at low conductivity, expand electromagnetic flowmeter range of application in the industrial production.
Description
Technical field
The utility model relates to a kind of electromagnetic flowmeter, especially measures the electromagnetic flowmeter of Liquid for Low Conductance, belongs to electromagnetic flowmeter equipment technical field.
Background technology
Electromagnetic flowmeter has a wide range of applications in water, sewage, mud, ore pulp, acid, alkali, salt liquid and the measurement of food slurries, has vital impact to industrial manufacture process.The ultimate principle of electromagnetic flowmeter (EMF) is Faraday's electromagnetic induction law, based on above measuring principle, electromagnetic flowmeter generally all adopts the excitation technology of positive-negative polarity in order to avoid polarization of electrode phenomenon, but when measuring low conductivity fluid flow, waving appears in the output of instrument, export unstable, cause using.The reason producing this phenomenon is that the electrochemical potential of electrode regularly changes when measuring low conductivity fluid, the noise signal that generation amplitude and excitation frequency are inversely proportional to, both hydrodynamic noises.Meanwhile, when measuring Liquid for Low Conductance, because the direct impedance of liquid is very large, and flow signal is very little, is therefore very easy to be disturbed by the power frequency component of industry spot, and causes the error of the measurement of flow signal very large further.And existing electromagnetic flowmeter complex structure, when measuring the liquid lower than room temperature, also insulation can be destroyed because of the outer condensation of measuring tube (or frost).
Utility model content
The utility model object is to provide a kind of electromagnetic flowmeter, and structure is simple, accurately can measure the fluid flow of low conductivity, solves Problems existing in background technology.
The technical solution of the utility model is:
A kind of electromagnetic flowmeter, comprise housing, ring flange, sensor, change send and display gauge head, indicator gauge, circuit board and electrode, the two ends of housing are respectively equipped with ring flange, the probe of sensor is provided with in housing, electrode is connected with the probe of sensor, change send and display gauge head is fixed on housing, and indicator gauge and circuit board are separately fixed at change and send and on display gauge head, be also provided with field coil in housing.
Described circuit board is provided with control circuit, described control circuit comprises sensor connected successively, amplifier, comparer, reservoir, bandpass filter, controlled accurate detuner, integral controller, low-pass filter amplifier, mould electricity number electricity converter, processor and numerically-controlled precise excitation current source, form closed circuit, comparer is connected with mould electricity number electricity converter with programmable amplifier by voltage modulator successively, processor is connected with clock circuit, battery, output interface respectively, and clock circuit connects reservoir and controlled accurate detuner respectively.
Produce constant current exciting current by numerically-controlled precise excitation current source and be supplied to sensor, then the direct ratio produced by sensor and the voltage signal of flow are amplified by input amplifier, this signal is subtracted each other with the Noise and Interference signal of electronic feedback in a comparator, then by bandpass filter, controlled accurate detuner, integral controller filtering, modulation are carried out to flow signal.Again after the filtering and signal transacting of low-pass filter amplifier, signal is amplified in the scope that can sample of mould electricity number electricity converter, is carried out the sampling of flow signal by processor.Processor carries out digital filter to its data obtained of sampling, processor controls the amplification of programmable amplifier, by the Noise and Interference signal feedback that obtained by digital signal processing in analog signal processing backfeed loop, the Noise and Interference signal that liquid is produced is inhibited greatly, thus achieves the high-acruracy survey to Liquid for Low Conductance.
The beneficial effects of the utility model are: structure is simple, accurately can measure the fluid flow of low conductivity, overcome application measured by current flux meter deficiency at low conductivity, expand electromagnetic flowmeter range of application in the industrial production.Meanwhile, while the signal to noise ratio (S/N ratio) improving sensor, also further reduce the ready-made power frequency of environment to the impact of flow signal, improve measuring accuracy.
Accompanying drawing explanation
Fig. 1 is the utility model front view;
Fig. 2 is the utility model side view;
Fig. 3 is the utility model circuit diagram;
In figure: housing 1, ring flange 2, sensor 3, become give and display gauge head 4, indicator gauge 5, circuit board 6, electrode 7, amplifier 8, comparer 9, reservoir 10, bandpass filter 11, controlled accurate detuner 12, integral controller 13, low-pass filter amplifier 14, clock circuit 15, programmable amplifier 16, voltage modulator 17, processor 18, mould electricity number electricity converter 19, numerically-controlled precise excitation current source 20, battery 21, output interface 22.
Embodiment
Below in conjunction with accompanying drawing, by example, the utility model is described in further detail.
With reference to accompanying drawing 1,2, a kind of electromagnetic flowmeter, comprise housing 1, ring flange 2, sensor 3, become and send and display gauge head 4, indicator gauge 5, circuit board 6 and electrode 7, the two ends of housing 1 are respectively equipped with ring flange 2, be provided with the probe of sensor 3 in housing 1, electrode 7 is connected with the probe of sensor 3, and change send and display gauge head 4 is fixed on housing 1, indicator gauge 5 and circuit board 6 are separately fixed at change and send and on display gauge head 4, be also provided with field coil in housing 1.
With reference to accompanying drawing 3, circuit board 6 is provided with control circuit, described control circuit comprises the sensor 3 be connected successively, amplifier 8, comparer 9, reservoir 10, bandpass filter 11, controlled accurate detuner 12, integral controller 13, low-pass filter amplifier 14, mould electricity number electricity converter 19, processor 18 and numerically-controlled precise excitation current source 20, form closed circuit, comparer 9 is connected with mould electricity number electricity converter 19 with programmable amplifier 16 by voltage modulator 17 successively, processor 18 respectively with clock circuit 15, battery 21, output interface 22 connects, clock circuit 15 connects reservoir 10 and controlled accurate detuner 12 respectively.
Produce constant current exciting current by numerically-controlled precise excitation current source 20 and be supplied to sensor 3, then the direct ratio produced by sensor 3 and the voltage signal of flow are amplified by input amplifier 8, this signal is subtracted each other with the Noise and Interference signal of electronic feedback in comparer 9, then by bandpass filter 11, controlled accurate detuner 12, integral controller 13 filtering, modulation are carried out to flow signal.Again after the filtering and signal transacting of low-pass filter amplifier 14, signal is amplified in the scope that can sample of mould electricity number electricity converter 19, is carried out the sampling of flow signal by processor 18.Processor 18 carries out digital filter to its data obtained of sampling, processor 18 controls the amplification of programmable amplifier 16, by the Noise and Interference signal feedback that obtained by digital signal processing in analog signal processing backfeed loop, the Noise and Interference signal that liquid is produced is inhibited greatly, thus achieves the high-acruracy survey to Liquid for Low Conductance.
Claims (2)
1. an electromagnetic flowmeter, it is characterized in that comprising housing (1), ring flange (2), sensor (3), become and send and display gauge head (4), indicator gauge (5), circuit board (6) and electrode (7), the two ends of housing (1) are respectively equipped with ring flange (2), the probe of sensor (3) is provided with in housing (1), electrode (7) is connected with the probe of sensor (3), change send and display gauge head (4) is fixed on housing (1), indicator gauge (5) and circuit board (6) are separately fixed at change and send and on display gauge head (4), housing is also provided with field coil in (1).
2. electromagnetic flowmeter according to claim 1, it is characterized in that described circuit board (6) is provided with control circuit, described control circuit comprises the sensor (3) be connected successively, amplifier (8), comparer (9), reservoir (10), bandpass filter (11), controlled accurate detuner (12), integral controller (13), low-pass filter amplifier (14), mould electricity number electricity converter (19), processor (18) and numerically-controlled precise excitation current source (20), form closed circuit, comparer (9) is connected with mould electricity number electricity converter (19) with programmable amplifier (16) by voltage modulator (17) successively, processor (18) respectively with clock circuit (15), battery (21), output interface (22) connects, clock circuit (15) connects reservoir (10) and controlled accurate detuner (12) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520019747.1U CN204313899U (en) | 2015-01-13 | 2015-01-13 | A kind of electromagnetic flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520019747.1U CN204313899U (en) | 2015-01-13 | 2015-01-13 | A kind of electromagnetic flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204313899U true CN204313899U (en) | 2015-05-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520019747.1U Expired - Fee Related CN204313899U (en) | 2015-01-13 | 2015-01-13 | A kind of electromagnetic flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204313899U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105547384A (en) * | 2015-12-31 | 2016-05-04 | 中国石油天然气股份有限公司 | Constantly magnetic type electromagnetic flowmeter |
| CN109252837A (en) * | 2018-12-04 | 2019-01-22 | 深圳市佳运通电子有限公司 | The small-bore flow transmitter of the automatically controlled seperated layer water injection in oil field |
| CN112229457A (en) * | 2020-11-19 | 2021-01-15 | 吉林大学 | Novel electromagnetic flowmeter and measuring method thereof |
-
2015
- 2015-01-13 CN CN201520019747.1U patent/CN204313899U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105547384A (en) * | 2015-12-31 | 2016-05-04 | 中国石油天然气股份有限公司 | Constantly magnetic type electromagnetic flowmeter |
| CN105547384B (en) * | 2015-12-31 | 2019-03-15 | 中国石油天然气股份有限公司 | A kind of constant magnetic electromagnetic flowmeter |
| CN109252837A (en) * | 2018-12-04 | 2019-01-22 | 深圳市佳运通电子有限公司 | The small-bore flow transmitter of the automatically controlled seperated layer water injection in oil field |
| CN109252837B (en) * | 2018-12-04 | 2024-01-30 | 深圳市佳运通电子有限公司 | Small-caliber flow transmitter for oilfield electric control separate layer water injection |
| CN112229457A (en) * | 2020-11-19 | 2021-01-15 | 吉林大学 | Novel electromagnetic flowmeter and measuring method thereof |
| CN112229457B (en) * | 2020-11-19 | 2021-09-21 | 吉林大学 | Novel electromagnetic flowmeter and measuring method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wang Qingshun Inventor after: Dong Lianxin Inventor after: Gu Liguo Inventor after: Pan Deng Inventor after: Xiao Changzheng Inventor after: Bao Ruibo Inventor after: Wang Shuqiang Inventor before: Liu Zuopeng Inventor before: Dong Xiaoyan Inventor before: Ma Lixin |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: LIU ZUOPENG DONG XIAOYAN MA LIXIN TO: WANG QINGSHUN DONG LIANXIN GU LIGUO PAN DENG XIAO CHANGZHENG BAO RUIBO WANG SHUQIANG |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150506 Termination date: 20200113 |