CN105571660A - Micro-power-consumption excitation electromagnetic flow transducer - Google Patents
Micro-power-consumption excitation electromagnetic flow transducer Download PDFInfo
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- CN105571660A CN105571660A CN201510942064.8A CN201510942064A CN105571660A CN 105571660 A CN105571660 A CN 105571660A CN 201510942064 A CN201510942064 A CN 201510942064A CN 105571660 A CN105571660 A CN 105571660A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/56—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects
- G01F1/58—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects by electromagnetic flowmeters
- G01F1/588—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects by electromagnetic flowmeters combined constructions of electrodes, coils or magnetic circuits, accessories therefor
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- Electromagnetism (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention discloses a micro-power-consumption excitation electromagnetic flow transducer. The electromagnetic flow transducer comprises a measuring tube, wherein two ends of the measuring tube are circular-opening straight tube regions, the middle is a measuring region, the straight tube regions and the measuring region are connected through transitional regions, the cross section of the measuring region is rectangular, and the area of the measuring region is smaller than that of the cross sections of the straight tube regions; measuring electrodes are mounted on the two sides of the measuring region, a grounding electrode is mounted on one side nearby the measuring region, and a magnetic circuit is arranged outside the measuring region and connected with a pulse excitation circuit. Compared with the prior art, the measuring tube is designed into a structure formed by the straight tube regions, the transitional regions and the measuring region, the cross section of the measuring region is rectangular, and the area is smaller than that of the cross sections of the straight tube regions, therefore, when fluid flows through the straight tubes, the speed in the measuring region is improved, and output signals of the sensor are improved; moreover, gaps of the magnetic circuit are reduced, therefore, higher magnetic induction strength is obtained.
Description
Technical field
The invention belongs to water meter technical field, especially relate to a kind of Micro Energy Lose exciting electromagnet flow sensor.
Background technology
Electromagnetic flow transducer is the core component of electromagnetic flowmeter and electromagnetism water meter, and its performance is directly connected to measuring accuracy and the serviceable life of instrument.Current electromagnetic flow transducer adopts column type to measure pipeline and constant current source excitation mode substantially.This Technical comparing is ripe, and technique is simple, is convenient to processing and manufacturing, but brings inevitable technical barrier to the use of flow measurement and instrument.First, cylindrical pipeline convection cell section uniformity requirement is high, in instrument is installed, require that long straight length is to ensure the symmetry of fluid flow profile, even if adopt through the weight magnetic field of Fine design, can not eliminate its impact completely.Secondly, adopt constant current source to encourage magnetic field, the soft magnetic materials such as magnetic circuit siliconized plate make, and ensure to have in field coil lasting electric current, and power consumption is difficult to reduce, and be unfavorable for adopting powered battery, serviceable life is greatly limited.Again, the stability in magnetic field is subject to the impact of power-supply fluctuation, can bring the variation of measuring-signal, cause measuring error.
Summary of the invention
The present invention is directed to deficiency of the prior art, provide a kind of low in energy consumption, long service life and measure Micro Energy Lose exciting electromagnet flow sensor accurately.
In order to solve the problems of the technologies described above, the present invention is solved by following technical proposals: a kind of Micro Energy Lose electromagnetic flow transducer, comprise measuring tube, it is characterized in that: described measuring tube two ends are circular port straight tube district, middle part is measurement zone, described straight tube district is connected by zone of transition with between described measurement zone, the xsect of described measurement zone is rectangle and its area is less than the cross-sectional area in described straight tube district, in the both sides of described measurement zone, potential electrode is installed, near described measurement zone, side is provided with ground-electrode, outside described measurement zone, magnetic circuit is installed, described magnetic circuit is connected with pulse excitation circuit.
Measuring tube is designed to the structure be made up of straight tube district, zone of transition, measurement zone three part by the present invention, because cross section, measurement zone is rectangle, area is less than cross section, straight tube district, so when fluid flows through described measuring tube, improve in measurement zone speed, be conducive to the output signal improving sensor, and reduce magnetic circuit gap, be conducive to obtaining higher magnetic induction density.
In order to obtain better technique effect, further technical measures also comprise: above-mentioned zone of transition is that square-section, described measurement zone is formed to described straight tube district round section by setting-out surface blending, and respectively at described measurement zone and straight tube district tangent.Carry out setting-out from the circular port at pipeline two ends to intermediate rectangular measurement zone to seamlessly transit, ensure that the symmetry in flow field, measurement zone.
As preferably, above-mentioned magnetic circuit comprises magnetic pole, lower magnetic pole, magnetic arm and field coil, described upper magnetic pole and lower magnetic pole be arranged in parallel, and in both same ends by being connected with both vertical magnetic arms, described field coil is evenly wound in the centre position of described magnetic arm, described field coil two ends connect described pulse excitation circuit, and described pulse excitation circuit provides two-phase cycle burst pulse voltage; Described upper magnetic pole and lower magnetic pole are installed on the upper and lower side of described measurement zone respectively.This programme adopts bi-directional voltage burst pulse exciting method to be that field coil is powered, and only provides the mmf needed for magnetic field commutator, and need not provide the exciting current maintaining magnetic field, greatly reduces biosensor power consumption, improves serviceable life.
Further improvement, above-mentioned upper magnetic pole, lower magnetic pole and described magnetic arm Rectangular hysteresis alloy panel beating make.This programme adopts rectangular hysteresis material to make magnetic circuit, utilizes the operating fields of remanent magnetism as sensor of magnetic circuit, avoids exciting current on the impact of stable magnetic field, is conducive to the reliability outputed signal.Simultaneously, rectangular hysteresis material is utilized to have the characteristic of high remanent magnetism, low-coercivity, the two--way pulse coordinating described field circuit to provide compresses into row Magnetic control, thus realizing Micro Energy Lose excitation, concrete principle is as follows: periodicity bipolar pulse voltage is supplied to described coil by described field circuit, in described coil, form exciting current, because the coercive force of magnetic circuit material is very low, so under the excitation of very little exciting current, magnetic direction just can reverse, and reaches the magnetic induction density of expection; After excitation pulse disappears, magnetic circuit still can keep higher magnetic induction density, is supplied to sensor and uses; When fluid flows through described measuring tube measurement zone, produce induced potential by the magnetic line of force of cutting magnetic circuit gap location, extracted by described potential electrode, and with described ground-electrode current potential for reference, carry out follow-up signal analysis and processing.
As preferably, above-mentioned upper magnetic pole and described lower magnetic pole include orthogonal magnetic pole plate and magnetic pole arm, two pieces of described magnetic pole plate are installed on the upper and lower side of described measurement zone respectively, and described magnetic pole plate width is identical with the width of described measurement zone, the length of described magnetic pole plate is slightly larger than the long limit of square-section, described measurement zone.
Further improvement comprises: the place of outer wall up and down of the center position of above-mentioned measurement zone is provided with groove, and described magnetic pole plate is installed in described groove, and described magnetic pole plate and described groove planes overlapping, described magnetic pole arm extends to outside described measurement zone.Groove makes measurement zone wall thickness reduce, and after installing described magnetic pole institute, the magnetic circuit gap of formation, much smaller than typical circular tube sensor structure, is conducive to reducing magnetic circuit reluctance, improves the magnetic induction density of operating fields further.
Preferably, above-mentioned magnetic arm is strip, and thickness is identical with described upper magnetic pole and described lower magnetic pole.
Preferably, the left and right sides, above-mentioned measurement zone wall has circular potential electrode hole, described potential electrode axially bored line is in described measurement zone center position, and described potential electrode is arranged in described potential electrode hole, and described potential electrode end face is concordant with described measuring tube internal face.
Preferably, above-mentioned zone of transition opens an annular ground electrode hole near the position of described measurement zone, and described ground-electrode is arranged in described ground-electrode hole, and described ground-electrode end face is no more than described measuring tube inner wall surface.
As preferably, above-mentioned measuring tube PPS material makes.
The invention has the beneficial effects as follows: compared with prior art, the present invention has the measuring tube of rectangle measurement zone, carry out setting-out from the circular port at pipeline two ends to intermediate rectangular measurement zone to seamlessly transit, the symmetry in the flow field, measurement zone ensured, and reduce magnetic circuit gap, be conducive to obtaining higher magnetic induction density; Secondly, adopt rectangular hysteresis material to make magnetic circuit, utilize the operating fields of remanent magnetism as sensor of magnetic circuit, avoid exciting current on the impact of stable magnetic field, be conducive to the reliability outputed signal; Finally, adopt bi-directional voltage burst pulse exciting method to be that field coil is powered, the mmf needed for magnetic field commutator is only provided, and the exciting current maintaining magnetic field need not be provided, greatly reduce biosensor power consumption, improve serviceable life.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention.
Fig. 2 is measurement zone of the present invention cross sectional representation.
Fig. 3 is measuring tube structural representation.
Fig. 4 is measuring tube vertical section structure schematic diagram.
Fig. 5 is magnetic structure schematic diagram.
Fig. 6 is the connection diagram of field circuit and coil.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail.
Embodiment 1:
See shown in Fig. 1 to Fig. 6, a kind of Micro Energy Lose exciting electromagnet flow sensor, comprise measuring tube 1, it is characterized in that: described measuring tube 1 two ends are circular port straight tube district 11, middle part is measurement zone 12, be connected by zone of transition 13 between described straight tube district 11 with described measurement zone 12, the xsect of described measurement zone 12 is rectangle and its area is less than the cross-sectional area in described straight tube district 11, in the both sides of described measurement zone 12, potential electrode 3 is installed, near described measurement zone 12, side is provided with ground-electrode 4, outside described measurement zone 11, magnetic circuit is installed, described magnetic circuit is connected with pulse excitation circuit 5.
Described zone of transition 13 is formed by setting-out surface blending to described straight tube district 11 round section for square-section, described measurement zone 12, and respectively at described measurement zone 12 and straight tube district 11 tangent.
Described magnetic circuit comprises magnetic pole 21, lower magnetic pole 22, magnetic arm 23 and field coil 24, described upper magnetic pole 21 and lower magnetic pole 22 be arranged in parallel, in both same ends by being connected with both vertical magnetic arms 23, described field coil 24 is evenly wound in the centre position of described magnetic arm 23, and described field coil 24 two ends connect described pulse excitation circuit 5, and described pulse excitation circuit 5 provides two-phase cycle burst pulse voltage; Described upper magnetic pole 21 and lower magnetic pole 22 are installed on the upper and lower side of described measurement zone 12 respectively.
Described upper magnetic pole 21, lower magnetic pole 22 and described magnetic arm 23 Rectangular hysteresis alloy panel beating makes.
Described upper magnetic pole 21 and described lower magnetic pole 22 include orthogonal magnetic pole plate 201 and magnetic pole arm 202, two pieces of described magnetic pole plate 201 are installed on the upper and lower side of described measurement zone 12 respectively, and described magnetic pole plate 201 width is identical with the width of described measurement zone 12, the length of described magnetic pole plate 201 is slightly larger than the long limit of square-section, described measurement zone 12.
The place of outer wall up and down of the center position of described measurement zone 12 is provided with groove 12a, and described magnetic pole plate 201 is installed in described groove 12a, and described magnetic pole plate 201 and described groove 12a planes overlapping, described magnetic pole arm 202 extends to outside described measurement zone 12.
Described magnetic arm 23 is strip, and thickness is identical with described upper magnetic pole and described lower magnetic pole.
The left and right sides, described measurement zone 12 wall has circular potential electrode hole 12b, described potential electrode hole 12b axis is in described measurement zone 12 center position, described potential electrode 3 is arranged in described potential electrode hole 12b, and described potential electrode 3 end face is concordant with described measuring tube 1 internal face.
Described zone of transition 13 opens an annular ground electrode hole 13a near the position of described measurement zone 12, and described ground-electrode 4 is arranged in described ground-electrode hole 13a, and described ground-electrode 4 end face is no more than described measuring tube 1 inner wall surface.
Described measuring tube 1 PPS material makes.
Claims (10)
1. a Micro Energy Lose exciting electromagnet flow sensor, comprise measuring tube (1), it is characterized in that: described measuring tube (1) two ends are circular port straight tube district (11), middle part is measurement zone (12), described straight tube district (11) is connected by zone of transition (13) with between described measurement zone (12), the xsect of described measurement zone (12) is rectangle and its area is less than the cross-sectional area of described straight tube district (11), in the both sides of described measurement zone (12), potential electrode (3) is installed, near described measurement zone (12), side is provided with ground-electrode (4), outside, described measurement zone (11) is provided with magnetic circuit, described magnetic circuit is connected with pulse excitation circuit (5).
2. a kind of Micro Energy Lose exciting electromagnet flow sensor according to claim 1, it is characterized in that: described zone of transition (13) is formed to described straight tube district (11) round section by setting-out surface blending for described measurement zone (12) square-section, and tangent respectively at described measurement zone (12) and straight tube district (11).
3. a kind of Micro Energy Lose exciting electromagnet flow sensor according to claim 2, it is characterized in that: described magnetic circuit comprises magnetic pole (21), lower magnetic pole (22), magnetic arm (23) and field coil (24), described upper magnetic pole (21) and lower magnetic pole (22) be arranged in parallel, in both same ends by being connected with both vertical magnetic arms (23), described field coil (24) is evenly wound in the centre position of described magnetic arm (23), described field coil (24) two ends connect described pulse excitation circuit (5), described pulse excitation circuit (5) provides two-phase cycle burst pulse voltage, described upper magnetic pole (21) and lower magnetic pole (22) are installed on the upper and lower side of described measurement zone (12) respectively.
4. a kind of Micro Energy Lose exciting electromagnet flow sensor according to claim 3, is characterized in that: described upper magnetic pole (21), lower magnetic pole (22) and described magnetic arm (23) Rectangular hysteresis alloy panel beating makes.
5. a kind of Micro Energy Lose exciting electromagnet flow sensor according to claim 4, it is characterized in that: described upper magnetic pole (21) and described lower magnetic pole (22) include orthogonal magnetic pole plate (201) and magnetic pole arm (202), two pieces of described magnetic pole plate (201) are installed on the upper and lower side of described measurement zone (12) respectively, and described magnetic pole plate (201) width is identical with the width of described measurement zone (12), the length of described magnetic pole plate (201) is slightly larger than the long limit of described measurement zone (12) square-section.
6. a kind of Micro Energy Lose exciting electromagnet flow sensor according to claim 5, it is characterized in that: the place of outer wall up and down of the center position of described measurement zone (12) is provided with groove (12a), described magnetic pole plate (201) is installed in described groove (12a), described magnetic pole plate (201) and described groove (12a) planes overlapping, described magnetic pole arm (202) extends to described measurement zone (12) outward.
7. a kind of Micro Energy Lose exciting electromagnet flow sensor according to claim 6, is characterized in that: described magnetic arm (23) is strip, and thickness is identical with described upper magnetic pole and described lower magnetic pole.
8. a kind of Micro Energy Lose exciting electromagnet flow sensor according to claim arbitrary in claim 1 to 7, it is characterized in that: described measurement zone (12) left and right sides wall has circular potential electrode hole (12b), described potential electrode hole (12b) axis is in described measurement zone (12) center position, described potential electrode (3) is arranged in described potential electrode hole (12b), and described potential electrode (3) end face is concordant with described measuring tube (1) internal face.
9. a kind of Micro Energy Lose exciting electromagnet flow sensor according to claim 8, it is characterized in that: described zone of transition (13) opens an annular ground electrode hole (13a) near the position of described measurement zone (12), described ground-electrode (4) is arranged in described ground-electrode hole (13a), and described ground-electrode (4) end face is no more than described measuring tube (1) inner wall surface.
10. a kind of Micro Energy Lose exciting electromagnet flow sensor according to claim 1, is characterized in that: described measuring tube (1) PPS material makes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510942064.8A CN105571660A (en) | 2015-12-16 | 2015-12-16 | Micro-power-consumption excitation electromagnetic flow transducer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510942064.8A CN105571660A (en) | 2015-12-16 | 2015-12-16 | Micro-power-consumption excitation electromagnetic flow transducer |
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| CN105571660A true CN105571660A (en) | 2016-05-11 |
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| CN201510942064.8A Pending CN105571660A (en) | 2015-12-16 | 2015-12-16 | Micro-power-consumption excitation electromagnetic flow transducer |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107228691A (en) * | 2017-07-28 | 2017-10-03 | 南通德高环境监测技术有限公司 | A kind of electromagnetic flowmeter |
| CN108507631A (en) * | 2018-03-12 | 2018-09-07 | 南京惠然测控技术有限公司 | A kind of electromagnetism water meter measurement pipe measuring electrode structure |
| US20200232150A1 (en) * | 2017-10-06 | 2020-07-23 | Eltek S.P.A. | Hydraulic control device for liquid- conducting household appliances and systems |
| CN114577282A (en) * | 2022-03-21 | 2022-06-03 | 浙江迪元仪表有限公司 | Self-rectifying low-power-consumption electromagnetic water meter sensor |
| CN115985648A (en) * | 2022-12-16 | 2023-04-18 | 宁夏隆基宁光仪表股份有限公司 | Excitation winding for electromagnetic water meter and electromagnetic water meter |
| EP4443115A1 (en) * | 2023-04-06 | 2024-10-09 | Sensus Spectrum LLC. | Electromagnetic flow sensor |
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| CN205246174U (en) * | 2015-11-26 | 2016-05-18 | 江苏迅创科技有限公司 | Two sensing ultrasonic wave liquid level switch |
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| JPH1183571A (en) * | 1997-09-12 | 1999-03-26 | Yamatake Honeywell Co Ltd | Electromagnetic flowmeter for fast excitation |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107228691A (en) * | 2017-07-28 | 2017-10-03 | 南通德高环境监测技术有限公司 | A kind of electromagnetic flowmeter |
| US20200232150A1 (en) * | 2017-10-06 | 2020-07-23 | Eltek S.P.A. | Hydraulic control device for liquid- conducting household appliances and systems |
| US12037734B2 (en) * | 2017-10-06 | 2024-07-16 | Eltek S.P.A. | Hydraulic control device for liquid-conducting household appliances and systems |
| CN108507631A (en) * | 2018-03-12 | 2018-09-07 | 南京惠然测控技术有限公司 | A kind of electromagnetism water meter measurement pipe measuring electrode structure |
| CN114577282A (en) * | 2022-03-21 | 2022-06-03 | 浙江迪元仪表有限公司 | Self-rectifying low-power-consumption electromagnetic water meter sensor |
| CN115985648A (en) * | 2022-12-16 | 2023-04-18 | 宁夏隆基宁光仪表股份有限公司 | Excitation winding for electromagnetic water meter and electromagnetic water meter |
| EP4443115A1 (en) * | 2023-04-06 | 2024-10-09 | Sensus Spectrum LLC. | Electromagnetic flow sensor |
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Application publication date: 20160511 |