CN209356533U - Current meter calibrating installation - Google Patents
Current meter calibrating installation Download PDFInfo
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- CN209356533U CN209356533U CN201822178450.6U CN201822178450U CN209356533U CN 209356533 U CN209356533 U CN 209356533U CN 201822178450 U CN201822178450 U CN 201822178450U CN 209356533 U CN209356533 U CN 209356533U
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- 238000009434 installation Methods 0.000 title abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 28
- 239000003990 capacitor Substances 0.000 claims description 13
- 239000000725 suspension Substances 0.000 claims description 7
- 238000007664 blowing Methods 0.000 claims description 6
- 230000007246 mechanism Effects 0.000 claims description 6
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 230000001133 acceleration Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 11
- 238000005259 measurement Methods 0.000 description 9
- 238000000819 phase cycle Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000012795 verification Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000013019 agitation Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Abstract
Current meter calibrating installation provided by the utility model, by 11 sets of moving coil outside cylindrical stator 12, when being connected with three-phase alternating current in moving coil 11, the moving magnetic field that can be generated between moving coil 11 and stator 12 makes moving coil 11 by the power radial parallel with stator 12, if when moving coil 11 and not coaxial stator 12, the radial force will pull moving coil 11 to the position coaxial with stator 12, therefore, the suspended motion on stator 12 of moving coil 11, improves the calibration accuracy of current meter；And larger current can be provided for moving coil 11 by three-phase alternating current source module 15, so that moving coil 11 generates biggish axial acceleration and brake force, realizes very fast acceleration and slow down, and then can reduce the length of sink 14.
Description
Technical Field
The utility model relates to a current meter technical field, more specifically say, relate to current meter calibrating device.
Background
Flow rate measurement is an important task in the hydraulic industry. The method plays an important role in making decisions such as flood control and drought resistance from the measurement of large-scale hydro-junction engineering. Currently, the flow velocity meter is mainly classified into contact measurement and non-contact measurement. The contact type flow velocity meter comprises a mechanical rotor flow velocity meter, an electromagnetic flow velocity meter, an ultrasonic flow velocity meter and the like. The non-contact current meter includes a radio wave current meter, a radar wave current meter, and the like.
Because the accuracy of the measurement result of the current meter is related to the accuracy of the hydrological information, the current meter after leaving the factory can be put into use only after the parameter performance of the current meter is determined to be qualified through verification and calibration; in addition, since the flow meters are often required to operate in natural bodies of water containing high concentrations of silt and salt, the structure of the flow meters may be subject to wear, resulting in changes in the performance of the parameters, and therefore require periodic re-certification and calibration.
According to the specification of the national standard GB/T21699-2008 rotor type current meter verification/calibration method in the straight line open trough, the verification of the current meter is that the current meter is pulled at various stable speeds in the straight line water trough with uniform and consistent cross section, the speed of a tractor and the rotor speed of the current meter are measured, and one or more equations are established and the using range is indicated from the two sets of data. A plurality of water level instrument equipment centers establish the current meter calibrating device of the still water channel method.
The existing flow meter calibrating device adopts a mode that a motor drives a trolley to move, and the flow meter needs a longer distance when accelerating from a static state to a higher speed, so that the length of a calibrating water tank is generally more than 100m, and the manufacturing cost of the whole project is very high; and the friction coefficient between the trolley and the trolley track changes due to long-time friction of the trolley track, so that the speed of the propelling trolley deviates, and the calibration of the current meter is influenced.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a current meter calibrating device wants to realize reducing the length of examining and determine basin in order to reduce the cost to and improve the purpose of calibration accuracy.
In order to achieve the above object, the following solutions are proposed:
a flow meter calibration device comprising: the device comprises a moving coil 11, a cylindrical stator 12, a speed measuring sensor 13, a water tank 14, a three-phase alternating-current power supply module 15, a driving circuit 16, a controller 17 and an upper computer 18;
the stator 12 is made of metal, and the stator 12 is arranged in parallel with the water tank 14;
the aperture of the moving coil 11 is larger than the diameter of the stator 12, the moving coil 11 is sleeved outside the stator 12, the moving coil 11 comprises a plurality of coils 111, and each coil 111 is connected with the three-phase alternating-current power supply module 15;
the portion of the moving coil 11 close to the water tank 14 comprises a suspension mechanism 112, the suspension mechanism 112 being used for suspending the current meter 19 to be calibrated;
the driving circuit 16 is respectively connected with the controller 17 and the three-phase alternating-current power supply module 15;
the speed measuring sensor 13 is connected with the controller 17;
the upper computer 18 is in communication connection with the flow velocity meter 19 to be calibrated and the controller 17 respectively.
Optionally, the three-phase ac power module 15 includes: a power supply rail 151, a brush 152, a first power supply 153, a second power supply 154, and a third power supply 155;
the power supply rail 151 comprises an initial power supply section 1511, an intermediate power supply section 1512, a braking power supply section 1513, and an insulating section 1514 disposed between each two power supply sections, the insulating section 1514 rendering each two power supply sections non-conductive;
the moving coil 11 is connected to the initial power supply segment 1511 through the brush 152, and when being powered by the first power supply 153, the moving coil is accelerated by a force greater than a resistance force in a direction toward a terminal of the stator 12;
the moving coil 11 is connected to the intermediate power supply section 1512 through the brush 152, and when being powered by the second power supply 154, the moving coil moves at a constant speed under the action of a force which is equal to a resistance and points to the terminal direction of the stator 12;
the moving coil 11 is connected to the braking power supply section 1513 through the brush 152, and when being supplied with power from the third power supply 155, performs a decelerating motion by receiving a force directed toward the starting end of the stator 12.
Optionally, the first power supply 153 is a three-phase high-voltage pulse capacitor and an electronic switch, the second power supply 154 is a three-phase sinusoidal power supply, and the third power supply 155 is a three-phase pulse capacitor and an electronic switch.
Optionally, the calibration apparatus for a flow meter further includes: an agitation means provided in the water tank 14 for agitating the water in the water tank 14.
Optionally, the calibration apparatus for a flow meter further includes: and the blowing device is used for blowing air to the water surface in the water tank 14.
Optionally, the material of the stator 12 is an aluminum alloy.
Compared with the prior art, the technical scheme of the utility model have following advantage:
according to the calibrating device for the current meter, the moving coil 11 is sleeved outside the cylindrical stator 12, when three-phase alternating current is conducted in the moving coil 11, a moving magnetic field generated between the moving coil 11 and the stator 12 enables the moving coil 11 to be subjected to force parallel to the radial direction of the stator 12, and if the moving coil 11 and the stator 12 are not coaxial, the radial force can pull the moving coil 11 to a position coaxial with the stator 12, so that the moving coil 11 can move on the stator 12 in a suspended mode, and the calibrating accuracy of the current meter is improved; and, can provide great electric current for moving coil 11 through three-phase alternating current power supply module 15, and then make moving coil 11 produce great axial acceleration force and braking force, realize that speed up and slow down sooner, and then can reduce the length of basin 14.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 to 3 are schematic structural views of a flow meter calibration device according to an embodiment of the present invention;
FIG. 4 is a schematic view of the axial movement of the moving coil on the stator;
FIG. 5 is a schematic view of the principle of the floating of the moving coil on the stator;
fig. 6 is a schematic circuit diagram of a three-phase ac power module according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
An embodiment of the utility model provides a current meter calibrating device. Referring to fig. 1 to 3, the calibration device for the current meter comprises: the device comprises a moving coil 11, a cylindrical stator 12, a speed measuring sensor 13, a water tank 14, a three-phase alternating current power supply module 15, a driving circuit 16, a controller 17 and an upper computer 18. Wherein,
the stator 12 is disposed in parallel with the water tank 14. Specifically, the stator holder 21 may be fixed above the water tank 14. The stator 12 is made of metal, in a preferred embodiment of the present invention, the stator 12 is made of aluminum alloy, and the length of the stator 12 is the same as the length of the water tank 14.
The aperture of the moving coil 11 is larger than the diameter of the stator 12, and the moving coil 11 is sleeved outside the stator 12. The aperture size of the moving coil 11 is determined according to the diameter size of the stator 12; when the moving coil 11 is coaxially sleeved outside the stator 12, a gap of 7mm or more exists between the moving coil and the stator. The moving coil 11 includes a plurality of coils 111, and each coil 111 is connected to the three-phase alternating-current power supply module 15. The plurality of coils 111 included in the moving coil 11 are divided into three parts, each of which is connected to one phase voltage, for example, a first partial coil 111 is connected to an a-phase voltage, a second partial coil 111 is connected to a B-phase voltage, and a third partial coil 111 is connected to a C-phase voltage. It should be noted that, a certain phase voltage connected to each coil may be changed, for example, when axial forces in different directions are provided to the moving coil 11, the phase voltages connected to each coil are different.
The portion of the moving coil 11 close to the tank 14 comprises a suspension mechanism 112, the suspension mechanism 112 being used to suspend the flowmeter 19 to be calibrated.
The driving circuit 16 is connected to the controller 17 and the three-phase ac power supply module 15, respectively. The speed sensor 13 is connected with the controller 17. The upper computer 18 is respectively in communication connection with the current meter 19 to be calibrated and the controller 17.
And (5) flow meter calibration process. When the moving coil 11 moves, the speed sensor 13 measures the moving speed of the moving coil 11, and the controller 17 transmits the moving speed of the moving coil 11 measured by the speed sensor 13 to the upper computer 18; when the moving coil 11 moves, the upper computer 18 also obtains a measurement value of the current meter 19 to be calibrated, calculates the precision of the current meter 19 to be calibrated by comparing the measurement value with the moving coil 11, and calibrates the current meter 19 to be calibrated. The controller 17 is also used for controlling the power supply condition of the three-phase alternating current power supply module 15 to the moving coil 11 through the driving circuit 16. The upper computer 18 is also used for displaying the calibration data of the current meter to be calibrated 19 so as to complete the function of human-computer interaction.
The moving coil 11 suspends the principle of motion on the stator 12. Referring to fig. 4, when A, B, C three-phase currents flowing through the coil 11 are sequentially different by 120 °, a moving magnetic field is generated between the moving coil 11 and the stator 12. The frequency of the moving magnetic field coincides with the power supply frequency. While the current in the moving coil 11 generates an induced current on the stator 12. According to the lorentz force theorem, the induced current generated in the stator 12 interacts with the magnetic flux generated by the moving coil 11 to generate thrust in the axial direction of the stator. Since the stator 12 is stationary, the moving coil 12 moves in the axial direction by this axial thrust. Referring to FIG. 5, a coil of radius r is in a current loop i carrying currentDRadial force dF under actionrIs dFr＝Idl×Bz. The moving coil 11 is also subjected to radial forces. If the moving coil 11 and the stator 12 are not coaxial, the radial force can pull the moving coil 11 to a position coaxial with the stator 12, so that the moving coil 11 can be coaxial with the stator 12 in the axial movement process, and the aperture of the moving coil 11 is larger than the diameter of the stator 12, so that the moving coil 11 and the stator 12 cannot be in contact when coaxial, friction cannot be generated, and the suspension movement of the moving coil 11 on the stator 12 is realized.
Referring to fig. 6, the three-phase ac power supply module 15 includes a power supply rail 151, a brush 152, a first power supply 153, a second power supply 154, and a third power supply 155. The power rail 151 includes an initial power supply section 1511, intermediate 1512 and braking 1513 power supply sections, and an insulating section 1514 disposed between each two power supply sections. Insulative segment 1514 is formed of an insulative material so that there is no electrical conduction between each two power supply segments. The moving coil 11 is fixedly connected to one end of the brush 152, and the other end of the brush 152 is in sliding contact with the power supply rail 151.
The moving coil 11 is connected to the initial power supply section 1511 through the brush 152, and when being supplied with power from the first power supply 153, the moving coil 11 is subjected to a force directed toward the terminal of the stator 12, which is greater than a resistance force, and at this time, the moving coil 11 performs an accelerated motion. The moving coil 11 is connected with the intermediate power supply section 1512 through the brush 152, and when the moving coil is powered by the second power supply 154, the force pointing to the terminal direction of the stator 12 is equal to the resistance, and at this time, the moving coil 11 makes a uniform motion; the moving coil 11 is connected to the braking power supply section 1513 through the brush 152, and when being powered by the third power supply 155, receives a force directed toward the starting end of the stator 12, and the moving coil 11 performs a deceleration motion.
The direction of the moving magnetic field generated by the moving coil 11 is related to the phase sequence of three-phase current in the moving coil 11, the phase sequence is ABC, the phase sequence is ACB, and the direction of the generated moving magnetic field is opposite. The first power supply 153 uses the ABC phase sequence to generate a force directed toward the terminal end of the stator 12, i.e., an acceleration force. The second power supply 154 generates a stable moving magnetic field by using a stable current source, so that the moving coil is subjected to a force equal to the resistance force in the direction of the terminal of the stator 12 and performs a uniform motion. The third power supply 155 uses the ACB phase sequence to generate a force directed in the direction of the start of the stator 12, i.e., a deceleration force.
The first power supply 153 is a three-phase high-voltage pulse capacitor Ca、Cb、CcAnd an electronic switch Sa、Sb、 Sc. The second power supply 154 is a three-phase sinusoidal power supply AC. The third power supply 155 is a three-phase pulse capacitor Ca、Cb、CcAnd an electronic switch Sa、Sb、Sc. The first power supply 153 adopts a three-phase high-voltage pulse capacitor Ca、Cb、CcWhen the discharge is very fast and the current is large, the moving coil 11 is accelerated to a given speed instantaneously, and the moving coil 11 can reach the moving speed of 20m/s within 1m distance. When the second power supply 154 supplies power to the moving coil 11, the current meter to be checked is started when the moving coil 11 moves at a constant speed, the current meter is calibrated, and the calibration of the current meter to be checked can be completed when the moving coil 11 moves at a constant speed for about one second, so that for the current meter with a range of 20m/s, the measurement requirement can be met when the corresponding distance at the stage is more than 25 m. When the third power supply 155 supplies power to the moving coil 11, the moving coil 11 is braked, and the distance corresponding to this stage is about 2 m. In order to ensure safe stop, a safe stop distance of about 2m is set at the end. Therefore, the utility model provides a scheme, also only need basin 14 about 30m to the current meter that the range reaches 20 m/s.
A first power supply 153. A phase high voltage pulse capacitor CaAnd an electronic switch SaAfter being connected in series, the power supply rail is connected between a power supply rail L1 and a power supply rail LN; b-phase high-voltage pulse capacitor CbAnd an electronic switch SbAfter being connected in series, the power supply rail is connected between a power supply rail L2 and a power supply rail LN; c-phase high-voltage pulse capacitor CcAnd an electronic switch ScAfter being connected in series, the power supply rail L3 and the power supply rail LN are connected.
A second power supply 154. A phase a of a three-phase sinusoidal power supply AC connected between the supply rail L1 and the supply rail LN; a phase B of the three-phase sinusoidal power supply AC connected between the supply rail L2 and the supply rail LN; the C-phase of the three-phase sinusoidal power supply AC is connected between the supply rail L3 and the supply rail LN.
And a third power supply 155. A phase pulse capacitor CaAnd an electronic switch SaAfter being connected in series, the power supply rail is connected between a power supply rail L1 and a power supply rail LN; b-phase pulse capacitor CbAnd an electronic switch SbAfter being connected in series, the power supply rail is connected between a power supply rail L3 and a power supply rail LN; c-phase pulse capacitor CcAnd an electronic switch ScAfter being connected in series, the power supply rail L2 and the power supply rail LN are connected.
In order to prevent the flow meter from generating mirror reflection during quiet sleep and affecting the accuracy of measurement, a stirring device can be arranged in the water tank 14 and used for stirring the water in the water tank 14; alternatively, a blowing device is provided for blowing air to the water surface in the water tank 14.
The above-described embodiments of the apparatus are merely illustrative, and some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The above description of the disclosed embodiments of the invention enables one skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. A flow meter calibration device, comprising: the device comprises a moving coil (11), a cylindrical stator (12), a speed measuring sensor (13), a water tank (14), a three-phase alternating current power supply module (15), a driving circuit (16), a controller (17) and an upper computer (18);
the stator (12) is made of metal, and the stator (12) and the water tank (14) are arranged in parallel;
the aperture of the moving coil (11) is larger than the diameter of the stator (12), the moving coil (11) is sleeved outside the stator (12), the moving coil (11) comprises a plurality of coils (111), and each coil (111) is connected with the three-phase alternating current power supply module (15);
the portion of the moving coil (11) close to the tank (14) comprises a suspension mechanism (112), the suspension mechanism (112) being used for suspending a current meter (19) to be calibrated;
the driving circuit (16) is respectively connected with the controller (17) and the three-phase alternating current power supply module (15);
the speed measuring sensor (13) is connected with the controller (17);
the upper computer (18) is in communication connection with the current meter (19) to be calibrated and the controller (17) respectively.
2. The rheometer calibration device according to claim 1, wherein the three-phase ac power module (15) comprises: a power supply rail (151), a brush (152), a first power supply (153), a second power supply (154), and a third power supply (155);
the power supply rail (151) comprises an initial power supply section (1511), an intermediate power supply section (1512) and a braking power supply section (1513), and an insulating section (1514) arranged between every two power supply sections, wherein the insulating section (1514) makes every two power supply sections non-conductive;
the moving coil (11) is connected with the initial power supply section (1511) through the electric brush (152), and when the moving coil is powered by the first power supply (153), the moving coil is accelerated by a force which is larger than a resistance and points to the terminal direction of the stator (12);
the moving coil (11) is connected with the middle power supply section (1512) through the electric brush (152), and when the moving coil is powered by the second power supply (154), the moving coil is subjected to a force pointing to the terminal direction of the stator (12) and is equal to a resistance force to move at a constant speed;
the moving coil (11) is connected with the braking power supply section (1513) through the electric brush (152), and when being powered by the third power supply source (155), the moving coil performs deceleration movement under the force pointing to the direction of the starting end of the stator (12).
3. The rheometer calibration device according to claim 2, wherein the first power supply (153) is a three-phase high voltage pulse capacitor and electronic switch, the second power supply (154) is a three-phase sinusoidal power supply, and the third power supply (155) is a three-phase pulse capacitor and electronic switch.
4. The rheometer calibration device of claim 1, further comprising: -agitating means provided in the water tank (14) for agitating the water in the water tank (14).
5. The rheometer calibration device of claim 1, further comprising: and the blowing device is used for blowing air to the water surface in the water tank (14).
6. The rheometer calibration device according to any one of claims 1-5, wherein the stator (12) is made of an aluminum alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822178450.6U CN209356533U (en) | 2018-12-24 | 2018-12-24 | Current meter calibrating installation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822178450.6U CN209356533U (en) | 2018-12-24 | 2018-12-24 | Current meter calibrating installation |
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| Publication Number | Publication Date |
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| CN209356533U true CN209356533U (en) | 2019-09-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822178450.6U Withdrawn - After Issue CN209356533U (en) | 2018-12-24 | 2018-12-24 | Current meter calibrating installation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109444470A (en) * | 2018-12-24 | 2019-03-08 | 北京奥特美克科技股份有限公司 | Current meter calibrating installation |
-
2018
- 2018-12-24 CN CN201822178450.6U patent/CN209356533U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109444470A (en) * | 2018-12-24 | 2019-03-08 | 北京奥特美克科技股份有限公司 | Current meter calibrating installation |
| CN109444470B (en) * | 2018-12-24 | 2024-05-28 | 北京奥特美克科技股份有限公司 | Calibrating device for flow velocity meter |
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Granted publication date: 20190906 Effective date of abandoning: 20240528 |