CN205246147U - Little consumption excitation electromagnetic flow transducer - Google Patents
Little consumption excitation electromagnetic flow transducer Download PDFInfo
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- CN205246147U CN205246147U CN201521051009.1U CN201521051009U CN205246147U CN 205246147 U CN205246147 U CN 205246147U CN 201521051009 U CN201521051009 U CN 201521051009U CN 205246147 U CN205246147 U CN 205246147U
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- electromagnetic flow
- flow transducer
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Abstract
The utility model discloses a little consumption excitation electromagnetic flow transducer, including surveying buret, survey the buret both ends for circular port straight tube district, the middle part be the measurement zone, the straight tube distinguish and link to each other through transition district between the measurement zone, the cross section of measurement zone is less than the cross sectional area in straight tube district for rectangle and its area, installs measuring electrode in the both sides of measurement zone, and telluric electricity field is installed to near measurement zone one side, and the magnetic circuit is installed in the measurement zone outside, and the magnetic circuit is connected with pulse excitation circuit. Compared with the prior art, the utility model discloses to survey buret and design the structure by straight tube district, transition district, measurement zone triplex, because the measurement zone cross -section be the rectangle, the area is less than straight tube district cross -section, so the fluid flow passes through when surveying buret, improve in measurement zone speed, be favorable to improving the output signal of sensor, reduced the magnetic circuit clearance moreover, be favorable to obtaining higher intensity of overflow tank.
Description
Technical field
The utility model belongs to water meter technical field, especially relates to a kind of micro-power dissipation exciting electromagnetic flow transducer.
Background technology
Electromagnetic flow transducer is the core component of electromagnetic flowmeter and electromagnetism water meter, and its performance is directly connected to certainty of measurement and the service life of instrument. Electromagnetic flow transducer adopts column type to measure pipeline and constant-current source excitation mode substantially at present. This technology comparative maturity, and technique is simple, is convenient to processing and manufacturing, but the use of flow measurement and instrument is brought to inevitable technical barrier. First, cylindrical pipeline convection cell section uniformity requirement is high, requires long straight length to ensure the symmetry of fluid flow profile in instrument is installed, even if adopt the weight magnetic field through Fine design, can not eliminate its impact completely. Secondly, adopt constant-current source to encourage magnetic field, magnetic circuit is made of soft magnetic materials such as silicon steel sheets, and ensure has lasting electric current, power consumption to be difficult to reduce in magnet exciting coil, is unfavorable for adopting powered battery, and service 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, causes measure error.
Summary of the invention
The utility model, for deficiency of the prior art, provides a kind of low in energy consumption, long service life and measurement micro-power dissipation exciting electromagnetic flow transducer accurately.
In order to solve the problems of the technologies described above, the utility model is solved by following technical proposals: a kind of micro-power dissipation exciting 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, between described straight tube district and described measurement zone, be connected by transition region, the cross section of described measurement zone is the cross-sectional area that rectangle and its area are less than described straight tube district, both sides at described measurement zone are provided with measurement electrode, near described measurement zone, a side is provided with earth electrode, described measurement zone outside is provided with magnetic circuit, described magnetic circuit is connected with pulse excitation circuit.
The utility model is designed to measuring tube the structure being made up of straight tube district, transition region, measurement zone three parts, because measurement zone cross section is rectangle, area is less than cross section, straight tube district, so fluid is flowed through when described measuring tube, improve in measurement zone speed, be conducive to improve the output signal of sensor, and reduced magnetic circuit gap, be conducive to obtain higher magnetic induction intensity.
In order to obtain better technique effect, further technical measures also comprise: above-mentioned transition region is that described measurement zone square-section forms by setting-out surface blending to described straight tube district circular cross-section, and tangent respectively at described measurement zone and straight tube district. Carry out setting-out from the circular port at pipeline two ends to intermediate rectangular measurement zone and seamlessly transit, ensured the symmetry in measurement zone flow field.
As preferably, above-mentioned magnetic circuit comprises magnetic pole, lower magnetic pole, magnetic arm and magnet exciting coil, described upper magnetic pole and lower magnetic pole be arranged in parallel, are connected by the magnetic arm vertical with both in both same ends, and described magnet exciting coil is evenly wound in the centre position of described magnetic arm, described magnet exciting 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 respectively the upper and lower side of described measurement zone. It is magnet exciting coil power supply that this programme adopts bi-directional voltage burst pulse exciting method, only provides magnetic field commutator required magnetomotive force, and the exciting current that maintains magnetic field needn't be provided, and greatly reduces sensor power consumption, has improved service life.
Further improve, above-mentioned upper magnetic pole, lower magnetic pole and described magnetic arm are made of Rectangular hysteresis alloy panel beating. This programme adopts rectangular hysteresis material to make magnetic circuit, utilizes the remanent magnetism of magnetic circuit as the work magnetic field of sensor, avoids the impact of exciting current on stable magnetic field, is conducive to the reliability of output signal. Simultaneously, utilize rectangular hysteresis material to there is the characteristic of high remanent magnetism, low-coercivity, the two--way pulse that coordinates described field circuit to provide is compressed into row magnetic field and is controlled, thereby realize micro-power dissipation exciting, concrete principle is as follows: periodicity bipolar pulse voltage is offered described coil by described field circuit, in described coil, forms exciting current, because the coercivity of magnetic circuit material is very low, so under very little exciting current excitation, magnetic direction just can reverse, and reaches the magnetic induction intensity of expection; After excitation pulse disappears, magnetic circuit still can keep higher magnetic induction intensity, offers sensor and uses; When fluid is flowed through described measuring tube measurement zone, produce induced potential by the magnetic line of force of cutting magnetic circuit gap location, extracted by described measurement electrode, and taking described earth electrode current potential as reference, carry out follow-up signal analysis and processing.
As preferably, above-mentioned upper magnetic pole and described lower magnetic pole include orthogonal pole plate and magnetic pole arm, two described pole plate are installed on respectively the upper and lower side of described measurement zone, and described pole plate width is identical with the width of described measurement zone, the length of described pole plate is slightly larger than the long limit of described measurement zone square-section.
Further improve and comprise: the place of outer wall up and down of the center position of above-mentioned measurement zone is provided with groove, and described pole plate is installed in described groove, described pole plate and described groove planes overlapping, described magnetic pole arm extends to outside described measurement zone. Groove reduces measurement zone wall thickness, installs after described magnetic pole institute, and the magnetic circuit gap of formation, much smaller than typical circular tube sensor structure, is conducive to reduce magnetic circuit reluctance, further improves the magnetic induction intensity in work magnetic field.
Preferably, above-mentioned magnetic arm is strip, and thickness is identical with described upper magnetic pole and described lower magnetic pole.
Preferably, on the wall of the above-mentioned measurement zone left and right sides, have circular measurement electrode hole, described measurement electrode axially bored line is in described measurement zone center position, and described measurement electrode is arranged in described measurement electrode hole, and described measurement electrode end face is concordant with described measuring tube internal face.
Preferably, above-mentioned transition region is opened a circular earth electrode hole near the position of described measurement zone, and described earth electrode is arranged in described earth electrode hole, and described earth electrode end face is no more than described measuring tube inner wall surface.
As preferably, above-mentioned measuring tube is made of PPS material.
The beneficial effects of the utility model are: compared with prior art, the utlity model has the measuring tube of rectangle measurement zone, carrying out setting-out from the circular port at pipeline two ends to intermediate rectangular measurement zone seamlessly transits, the symmetry in the measurement zone flow field ensureing, and reduced magnetic circuit gap, be conducive to obtain higher magnetic induction intensity; Secondly, adopt rectangular hysteresis material to make magnetic circuit, utilize the remanent magnetism of magnetic circuit as the work magnetic field of sensor, avoid the impact of exciting current on stable magnetic field, be conducive to the reliability of output signal; Finally, adopting bi-directional voltage burst pulse exciting method is magnet exciting coil power supply, only provides magnetic field commutator required magnetomotive force, and the exciting current that maintains magnetic field needn't be provided, and greatly reduces sensor power consumption, has improved service life.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model embodiment.
Fig. 2 is the utility model measurement zone 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.
Detailed description of the invention
Below in conjunction with accompanying drawing and detailed description of the invention, the utility model is described in further detail.
Embodiment 1:
Referring to shown in Fig. 1 to Fig. 6, a kind of micro-power dissipation exciting electromagnetic flow transducer, 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, between described straight tube district 11 and described measurement zone 12, be connected by transition region 13, the cross section of described measurement zone 12 is the cross-sectional area that rectangle and its area are less than described straight tube district 11, in the both sides of described measurement zone 12, measurement electrode 3 is installed, near described measurement zone 12, a side is provided with earth electrode 4, described measurement zone 11 outsides are provided with magnetic circuit, described magnetic circuit is connected with pulse excitation circuit 5.
Described transition region 13 forms by setting-out surface blending to described straight tube district 11 circular cross-sections for described measurement zone 12 square-sections, and tangent respectively at described measurement zone 12 and straight tube district 11.
Described magnetic circuit comprises magnetic pole 21, lower magnetic pole 22, magnetic arm 23 and magnet exciting coil 24, described upper magnetic pole 21 and lower magnetic pole 22 be arranged in parallel, be connected by the magnetic arm vertical with both 23 in both same ends, described magnet exciting coil 24 is evenly wound in the centre position of described magnetic arm 23, and described magnet exciting 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 respectively the upper and lower side of described measurement zone 12.
Described upper magnetic pole 21, lower magnetic pole 22 and described magnetic arm 23 use Rectangular hysteresis alloy panel beatings are made.
Described upper magnetic pole 21 and described lower magnetic pole 22 include orthogonal pole plate 201 and magnetic pole arm 202, two described pole plate 201 are installed on respectively the upper and lower side of described measurement zone 12, and described pole plate 201 width are identical with the width of described measurement zone 12, and the length of described pole plate 201 is slightly larger than the long limit of described measurement zone 12 square-sections.
The place of outer wall up and down of the center position of described measurement zone 12 is provided with groove 12a, and described pole plate 201 is installed in described groove 12a, described pole plate 201 and described groove 12a planes overlapping, and 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.
On described measurement zone 12 left and right sides walls, have circular measurement electrode hole 12b, described measurement electrode hole 12b axis is in described measurement zone 12 center positions, described measurement electrode 3 is arranged in described measurement electrode hole 12b, and described measurement electrode 3 end faces are concordant with described measuring tube 1 internal face.
Described transition region 13 is opened a circular earth electrode hole 13a near the position of described measurement zone 12, and described earth electrode 4 is arranged in described earth electrode hole 13a, and described earth electrode 4 end faces are no more than described measuring tube 1 inner wall surface.
Described measuring tube 1 use PPS material is made.
Claims (9)
1. a micro-power dissipation exciting electromagnetic flow transducer, 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), between described straight tube district (11) and described measurement zone (12), be connected by transition region (13), the cross section of described measurement zone (12) is the cross-sectional area that rectangle and its area are less than described straight tube district (11), in the both sides of described measurement zone (12), measurement electrode (3) is installed, near described measurement zone (12), a side is provided with earth electrode (4), described measurement zone (11) outside is provided with magnetic circuit, described magnetic circuit is connected with pulse excitation circuit (5).
2. the micro-power dissipation exciting electromagnetic flow transducer of one according to claim 1, it is characterized in that: described transition region (13) forms by setting-out surface blending to described straight tube district (11) circular cross-section for described measurement zone (12) square-section, and tangent respectively at described measurement zone (12) and straight tube district (11).
3. the micro-power dissipation exciting electromagnetic flow transducer of one according to claim 2, it is characterized in that: described magnetic circuit comprises magnetic pole (21), lower magnetic pole (22), magnetic arm (23) and magnet exciting coil (24), described upper magnetic pole (21) and lower magnetic pole (22) be arranged in parallel, be connected by the magnetic arm vertical with both (23) in both same ends, described magnet exciting coil (24) is evenly wound in the centre position of described magnetic arm (23), described magnet exciting 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 respectively the upper and lower side of described measurement zone (12).
4. the micro-power dissipation exciting electromagnetic flow transducer of one according to claim 3, is characterized in that: described upper magnetic pole (21), lower magnetic pole (22) and described magnetic arm (23) are made of Rectangular hysteresis alloy panel beating.
5. the micro-power dissipation exciting electromagnetic flow transducer of one according to claim 4, it is characterized in that: described upper magnetic pole (21) and described lower magnetic pole (22) include orthogonal pole plate (201) and magnetic pole arm (202), two described pole plate (201) are installed on respectively the upper and lower side of described measurement zone (12), and described pole plate (201) width is identical with the width of described measurement zone (12), and the length of described pole plate (201) is slightly larger than the long limit of described measurement zone (12) square-section.
6. the micro-power dissipation exciting electromagnetic flow transducer of one 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 pole plate (201) is installed in described groove (12a), described pole plate (201) and described groove (12a) planes overlapping, described magnetic pole arm (202) extends to outside described measurement zone (12).
7. the micro-power dissipation exciting electromagnetic flow transducer of one 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. according to the micro-power dissipation exciting electromagnetic flow transducer of the one described in arbitrary claim in claim 1 to 7, it is characterized in that: on the wall of described measurement zone (12) left and right sides, have circular measurement electrode hole (12b), described measurement electrode hole (12b) axis is in described measurement zone (12) center position, described measurement electrode (3) is arranged in described measurement electrode hole (12b), and described measurement electrode (3) end face is concordant with described measuring tube (1) internal face.
9. the micro-power dissipation exciting electromagnetic flow transducer of one according to claim 8, it is characterized in that: described transition region (13) is opened a circular earth electrode hole (13a) near the position of described measurement zone (12), described earth electrode (4) is arranged in described earth electrode hole (13a), and described earth electrode (4) end face is no more than described measuring tube (1) inner wall surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521051009.1U CN205246147U (en) | 2015-12-16 | 2015-12-16 | Little consumption excitation electromagnetic flow transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521051009.1U CN205246147U (en) | 2015-12-16 | 2015-12-16 | Little consumption excitation electromagnetic flow transducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205246147U true CN205246147U (en) | 2016-05-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521051009.1U Active CN205246147U (en) | 2015-12-16 | 2015-12-16 | Little consumption excitation electromagnetic flow transducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205246147U (en) |
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2015
- 2015-12-16 CN CN201521051009.1U patent/CN205246147U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Hongxing Road Jiangbei District 315032 Zhejiang city of Ningbo province No. 355 Patentee after: Ningbo water meter (Group) Co.,Ltd. Address before: Hongxing Road Jiangbei District 315032 Zhejiang city of Ningbo province No. 355 Patentee before: NINGBO WATER METER Co.,Ltd. |