CN109444470B - Calibrating device for flow velocity meter - Google Patents
Calibrating device for flow velocity meter Download PDFInfo
- Publication number
- CN109444470B CN109444470B CN201811581235.9A CN201811581235A CN109444470B CN 109444470 B CN109444470 B CN 109444470B CN 201811581235 A CN201811581235 A CN 201811581235A CN 109444470 B CN109444470 B CN 109444470B
- Authority
- CN
- China
- Prior art keywords
- power supply
- moving coil
- stator
- water tank
- phase
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000001133 acceleration Effects 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 33
- 239000003990 capacitor Substances 0.000 claims description 13
- 238000007664 blowing Methods 0.000 claims description 6
- 230000007246 mechanism Effects 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 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
- 238000000034 method Methods 0.000 description 10
- 238000005259 measurement Methods 0.000 description 5
- 238000000819 phase cycle Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000012795 verification Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000003068 static effect Effects 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000005339 levitation Methods 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
- 239000013049 sediment Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P21/00—Testing or calibrating of apparatus or devices covered by the preceding groups
- G01P21/02—Testing or calibrating of apparatus or devices covered by the preceding groups of speedometers
- G01P21/025—Testing or calibrating of apparatus or devices covered by the preceding groups of speedometers for measuring speed of fluids; for measuring speed of bodies relative to fluids
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Linear Motors (AREA)
Abstract
According to the calibrating device for the flow velocity meter, the moving coil 11 is sleeved outside the cylindrical stator 12, when three-phase alternating current is supplied to the moving coil 11, the moving magnetic field generated between the moving coil 11 and the stator 12 enables the moving coil 11 to bear 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 pulls the moving coil 11 to a position coaxial with the stator 12, so that the moving coil 11 moves in a suspending mode on the stator 12, and the calibrating precision of the flow velocity meter is improved; and, can provide great electric current for moving coil 11 through three-phase alternating current power module 15, and then make moving coil 11 produce great axial acceleration force and braking force, realize faster acceleration and deceleration, and then can reduce the length of basin 14.
Description
Technical Field
The invention relates to the technical field of flowmeters, in particular to a flowmeter calibrating device.
Background
Flow rate measurement is an important task in the water conservancy industry. The method plays an important role in decision making from measurement of large-scale hydraulic junction engineering to flood control, drought resistance and the like. Currently, flowmeters are largely 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. Non-contact flowmeters include electric wave flowmeters, radar wave flowmeters, and the like.
Because the accuracy of the measuring result of the flow velocity meter is related to the accuracy of hydrological information, the flow velocity meter after leaving the factory needs to be verified and calibrated, and the flow velocity meter can be put into use after the parameter performance is qualified; in addition, because flowmeters often need to operate in natural bodies of water that contain high levels of sediment and salt, the structure of the flowmeters may be worn out, resulting in a change in the performance of the parameters, and therefore require periodic recalibration and calibration.
According to the specification of the national standard ' rotor type flow rate meter verification/calibration method in a straight line open tank of GB/T21699-2008 ', the ' flow rate meter verification is adopted in a straight line water tank with uniform and consistent cross section and static water, the flow rate meter is pulled at various stable speeds, the speed of a tractor and the rotor speed of the flow rate meter are measured, and one or several equations are established from the two sets of data and the application range of the equations is pointed out. The centers of a plurality of water level instruments and equipment are provided with a flow meter calibrating device for the hydrostatic tank method.
The existing flowmeter calibration device adopts a mode that a motor drives a trolley to move, and the flowmeter needs a longer distance from a static state to a higher speed, so that the length of a verification 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 pushing the trolley is deviated, and the calibration of the flow velocity meter is affected.
Disclosure of Invention
In view of the above, the present invention provides a calibration device for a flow meter, which is intended to achieve the purposes of reducing the length of a verification water tank, reducing the cost, and improving the calibration accuracy.
In order to achieve the above object, the following solutions have been 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 part of the moving coil 11 close to the water tank 14 comprises a hanging mechanism 112, and the hanging mechanism 112 is used for hanging the flowmeter 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 respectively in communication connection with the flow rate meter 19 to be calibrated and the controller 17.
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 includes an initial power supply section 1511, an intermediate power supply section 1512, and a brake 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 with the initial power supply section 1511 through the brush 152, and when being powered by the first power supply 153, the moving coil is subjected to acceleration movement with force which is larger than resistance and is directed to the terminal direction of the stator 12;
The moving coil 11 is connected with the intermediate power supply section 1512 through the brush 152, and when being powered by the second power supply 154, the moving coil receives a force which is equal to resistance and is directed to the terminal direction of the stator 12 to perform uniform motion;
The moving coil 11 is connected to the braking power supply section 1513 via the brush 152, and is decelerated by a force directed in the direction of the start end of the stator 12 when supplied with power from the third power supply 155.
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 above-mentioned current meter calibrating device further includes: and an agitating device provided in the water tank 14 for agitating the water in the water tank 14.
Optionally, the above-mentioned current meter calibrating device further includes: and a blowing device 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 invention has the following advantages:
According to the calibrating device for the flow velocity meter, provided by the technical scheme, the moving coil 11 is sleeved outside the cylindrical stator 12, when three-phase alternating current is supplied to the moving coil 11, a moving magnetic field generated between the moving coil 11 and the stator 12 enables the moving coil 11 to bear a 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 pulls the moving coil 11 to a position coaxial with the stator 12, so that the moving coil 11 moves in a suspending manner on the stator 12, and the calibrating precision of the flow velocity meter is improved; and, can provide great electric current for moving coil 11 through three-phase alternating current power module 15, and then make moving coil 11 produce great axial acceleration force and braking force, realize faster acceleration and deceleration, 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 that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIGS. 1 to 3 are schematic structural views of a calibrating device for a flow meter according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of the principle of axial motion of a moving coil on a stator;
FIG. 5 is a schematic diagram of the principle of levitation of moving coils on a 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 following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment of the invention provides a calibrating device for a flow velocity meter. Referring to fig. 1 to 3, the flow meter calibration device includes: 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 parallel to the water tank 14. Specifically, the stator holder 21 may be fixed above the water tank 14. The material of the stator 12 is metal, and in a preferred embodiment of the invention the material of the stator 12 is an aluminum alloy, the length of the stator 12 being consistent with the length of the sink 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 sleeved outside the stator 12 and coaxial, a gap of more than 7mm 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 ac power supply module 15. The moving coil 11 includes a plurality of coils 111 divided into three parts, each of which is connected to a phase voltage, for example, a first part of the coils 111 is connected to an a phase voltage, a second part of the coils 111 is connected to a B phase voltage, and a third part of the coils 111 is connected to a C phase voltage. It should be noted that, the voltage of a certain phase of each partial coil connection may be variable, for example, when the moving coil 11 is provided with axial forces in different directions, the voltage of the phase of each partial coil connection is different.
The portion of the moving coil 11 adjacent to the water tank 14 includes a suspension mechanism 112, and the suspension mechanism 112 is used to suspend the flow meter 19 to be calibrated.
The driving circuit 16 is connected to the controller 17 and the three-phase ac power module 15, respectively. The tachometer sensor 13 is connected to a controller 17. The upper computer 18 is respectively in communication connection with the flow rate meter 19 to be calibrated and the controller 17.
And (5) checking a flow rate meter. 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 acquires a measured value of the flow rate meter 19 to be calibrated, calculates the accuracy of the flow rate meter 19 to be calibrated by comparing the measured value with the moving coil 11, and calibrates the flow rate 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 19 is also used for displaying calibration data of the flow meter 19 to be calibrated, and completing the function of man-machine interaction.
The moving coil 11 floats on the stator 12 on the principle of motion. Referring to fig. 4, when A, B, C three phases of 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 is consistent with the power supply frequency. While the current in the moving coil 11 produces an induced current on the stator 12. According to the lorentz force theorem, the induced current generated on the stator 12 and the magnetic flux generated by the moving coil 11 interact 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 under the axial thrust. Referring to fig. 5, the radial stress dF r of the coil with radius r is dF r＝Idl×Bz under the action of the current loop i D with current. 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 pulls the moving coil 11 to a position coaxial with the stator 12, so that the moving coil 11 is 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 contact is not generated when the moving coil 11 and the stator are coaxial, friction is not generated, and the moving coil 11 can float on the stator 12.
Referring to fig. 6, the three-phase ac power module 15 includes a power supply rail 151, brushes 152, a first power supply 153, a second power supply 154, and a third power supply 155. The power supply rail 151 includes an initial power supply section 1511, an intermediate power supply section 1512, and a brake power supply section 1513, and an insulating section 1514 provided between each two power supply sections. The insulating segments 1514 are made of an insulating material so that no electrical conduction occurs between each two power 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 the power is supplied from the first power supply 153, the force applied in the direction of the terminal end of the stator 12 is larger than the resistance force, and the moving coil 11 performs the acceleration motion. The moving coil 11 is connected with the intermediate power supply section 1512 through the brush 152, and when the second power supply 154 supplies power, the force directed to the terminal direction of the stator 12 is equal to the resistance, and at the moment, the moving coil 11 moves at a uniform speed; the moving coil 11 is connected to the brake power supply section 1513 via the brush 152, and receives a force directed in the direction of the start end of the stator 12 when supplied with power from the third power supply 155, and the moving coil 11 performs a decelerating motion.
The direction of the moving magnetic field generated by the moving coil 11 is related to the phase sequence of the three-phase current in the moving coil 11, the phase sequence is ABC and 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 in the direction of the terminals 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 receives a force directed toward the terminal end of the stator 12 equal to the resistance force and moves at a uniform speed. The third power supply 155 uses the ACB phase sequence to generate a force directed in the direction of the beginning of the stator 12, i.e. a deceleration force.
The first power supply 153 is a three-phase high-voltage pulse capacitor C a、Cb、Cc and an electronic switch S a、Sb、Sc. The second power supply 154 is a three-phase sinusoidal power AC. The third power supply 155 is a three-phase pulse capacitor C a、Cb、Cc and an electronic switch S a、Sb、Sc. The first power supply 153 adopts a three-phase high-voltage pulse capacitor C a、Cb、Cc, discharges very fast and has large current, and the moving coil 11 is accelerated to a given speed instantaneously, so that the moving coil 11 can reach a moving speed of 20m/s within a distance of 1 m. When the second power supply 154 supplies power to the moving coil 11, the current meter to be calibrated is started when the moving coil 11 moves at a uniform speed, and the current meter to be calibrated is calibrated, and the current meter to be calibrated can be calibrated after the moving coil 11 moves at a uniform speed for about one second, so that the current meter with the measuring range reaching 20m/s can be measured at a distance greater 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. To ensure a safe stop, a safe stop distance of about 2m is set at the end. Therefore, the present invention provides a solution that only a water tank 14 of about 30m is needed for a flow rate meter with a measuring range of 20 m/s.
A first power supply 153. After being connected in series with the electronic switch S a, the A-phase high-voltage pulse capacitor C a is connected between the power supply guide rail L1 and the power supply guide rail LN; the B-phase high-voltage pulse capacitor C b and the electronic switch S b are connected in series and then connected between the power supply guide rail L2 and the power supply guide rail LN; after the C-phase high-voltage pulse capacitor C c and the electronic switch S c are connected in series, they are connected between the power supply rail L3 and the power supply rail LN.
A second power supply 154. The phase A of the three-phase sinusoidal power supply AC is connected between the power supply guide rail L1 and the power supply guide rail LN; the phase B of the three-phase sinusoidal power supply AC is connected between the power supply guide rail L2 and the power supply guide 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. After being connected in series with the electronic switch S a, the A-phase pulse capacitor C a is connected between the power supply guide rail L1 and the power supply guide rail LN; the B-phase pulse capacitor C b and the electronic switch S b are connected in series and then connected between the power supply guide rail L3 and the power supply guide rail LN; after being connected in series with the electronic switch S c, the C-phase pulse capacitor C c is connected between the power supply rail L2 and the power supply rail LN.
In order to prevent the flow meter from generating specular reflection during calm sleep and affecting the accuracy of measurement, stirring means may be provided in the water tank 14 for stirring the water in the water tank 14; or a blowing device is provided for blowing air to the water surface in the water tank 14.
The above-described embodiment of the apparatus is merely illustrative, and some or all of the modules may be selected according to actual needs to achieve the purpose of the embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
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. Moreover, 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 one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present 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 (5)
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 part of the moving coil (11) close to the water tank (14) comprises a hanging mechanism (112), and the hanging mechanism (112) is used for hanging a flowmeter (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 respectively in communication connection with the flow rate meter (19) to be calibrated and the controller (17);
the three-phase alternating current 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 supply guide rail (151) comprises an initial power supply section (1511), an intermediate power supply section (1512) and a brake power supply section (1513), and an insulating section (1514) arranged between every two power supply sections, wherein the insulating section (1514) enables no conduction between every two power supply sections;
the moving coil (11) is connected with the initial power supply section (1511) through the electric brush (152), and when the electric brush is powered by the first power supply (153), the force directed to the terminal direction of the stator (12) is larger than the resistance to perform acceleration movement;
the moving coil (11) is connected with the intermediate power supply section (1512) through the electric brush (152), and when the second power supply (154) supplies power, the moving coil is subjected to force which points to the terminal direction of the stator (12) and is equal to resistance to do uniform motion;
The moving coil (11) is connected with the braking power supply section (1513) through the electric brush (152), and is subjected to force pointing to the direction of the starting end of the stator (12) to perform deceleration movement when being supplied with power by the third power supply (155).
2. The flow meter calibration of claim 1, wherein 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.
3. The flow meter calibration of claim 1, further comprising: and the stirring device is arranged in the water tank (14) and is used for stirring the water in the water tank (14).
4. The flow meter calibration of claim 1, further comprising: and the blowing device is used for blowing air to the water surface in the water tank (14).
5. The flow meter calibration of one of claims 1 to 4, wherein the material of the stator (12) is an aluminum alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811581235.9A CN109444470B (en) | 2018-12-24 | 2018-12-24 | Calibrating device for flow velocity meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811581235.9A CN109444470B (en) | 2018-12-24 | 2018-12-24 | Calibrating device for flow velocity meter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109444470A CN109444470A (en) | 2019-03-08 |
| CN109444470B true CN109444470B (en) | 2024-05-28 |
Family
ID=65535279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811581235.9A Active CN109444470B (en) | 2018-12-24 | 2018-12-24 | Calibrating device for flow velocity meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109444470B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110007110A (en) * | 2019-04-22 | 2019-07-12 | 中国科学院大学 | Method and device based on electromagnetic induction principle measurement high temperature fluent metal flow velocity |
| CN111289774B (en) * | 2020-03-20 | 2021-11-30 | 重庆市计量质量检测研究院 | Annular water tank current meter calibration system with water wave elimination device |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5072144A (en) * | 1989-07-15 | 1991-12-10 | Matsushita Electric Works, Ltd. | Moving-coil linear motor |
| CN1433127A (en) * | 2002-01-16 | 2003-07-30 | 科龙勇发株式会社 | Linear motor |
| CN101738498A (en) * | 2009-12-18 | 2010-06-16 | 重庆建设工业有限责任公司 | Device for calibrating high-speed motion measuring instrument |
| CN202149907U (en) * | 2011-07-20 | 2012-02-22 | 浙江省计量科学研究院 | Ground induction coil tachymeter simulation calibrating device based on current signal |
| CN102457154A (en) * | 2010-10-19 | 2012-05-16 | 叶建国 | Linear motor device |
| CN102969865A (en) * | 2012-11-22 | 2013-03-13 | 中国科学院电工研究所 | Non-contact solenoid drive device of linear conducting liquid |
| CN105158512A (en) * | 2015-08-14 | 2015-12-16 | 水利部南京水利水文自动化研究所 | Detection method of acoustic Doppler profile flow velocity meter |
| CN105408722A (en) * | 2013-08-27 | 2016-03-16 | 无锡必创传感科技有限公司 | Sensor calibration platform |
| CN209356533U (en) * | 2018-12-24 | 2019-09-06 | 北京奥特美克科技股份有限公司 | Current meter calibrating installation |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI236945B (en) * | 2003-05-14 | 2005-08-01 | Hon Hai Prec Ind Co Ltd | Machining guideway |
-
2018
- 2018-12-24 CN CN201811581235.9A patent/CN109444470B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5072144A (en) * | 1989-07-15 | 1991-12-10 | Matsushita Electric Works, Ltd. | Moving-coil linear motor |
| CN1433127A (en) * | 2002-01-16 | 2003-07-30 | 科龙勇发株式会社 | Linear motor |
| CN101738498A (en) * | 2009-12-18 | 2010-06-16 | 重庆建设工业有限责任公司 | Device for calibrating high-speed motion measuring instrument |
| CN102457154A (en) * | 2010-10-19 | 2012-05-16 | 叶建国 | Linear motor device |
| CN202149907U (en) * | 2011-07-20 | 2012-02-22 | 浙江省计量科学研究院 | Ground induction coil tachymeter simulation calibrating device based on current signal |
| CN102969865A (en) * | 2012-11-22 | 2013-03-13 | 中国科学院电工研究所 | Non-contact solenoid drive device of linear conducting liquid |
| CN105408722A (en) * | 2013-08-27 | 2016-03-16 | 无锡必创传感科技有限公司 | Sensor calibration platform |
| CN105158512A (en) * | 2015-08-14 | 2015-12-16 | 水利部南京水利水文自动化研究所 | Detection method of acoustic Doppler profile flow velocity meter |
| CN209356533U (en) * | 2018-12-24 | 2019-09-06 | 北京奥特美克科技股份有限公司 | Current meter calibrating installation |
Non-Patent Citations (1)
| Title |
|---|
| ADCP流速仪检定拖车驱动方案探讨;智永明等;中国测试;第42卷(第11期);智永明等 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109444470A (en) | 2019-03-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Soti et al. | Damping effects on vortex-induced vibration of a circular cylinder and implications for power extraction | |
| CN109444470B (en) | Calibrating device for flow velocity meter | |
| CN101680779B (en) | Linear motor position detection system | |
| Arif et al. | Measurement of speed and calibration of tachometers using rotating magnetic field | |
| CN209356533U (en) | Current meter calibrating installation | |
| CN103941756B (en) | The noncontact formula ACTIVE CONTROL method of Micromass cell culture system vibration | |
| Ge et al. | A Self‐Powered Flow Velocity Sensing System Based on Hybrid Piezo‐Triboelectric Nanogenerator | |
| Wang et al. | Inductance estimation method for linear switched reluctance machines considering iron losses | |
| CN103684194A (en) | Asynchronous-induction linear motor and method for driving asynchronous-induction linear motor | |
| JP2000131004A (en) | Distance measuring apparatus | |
| CN105591520B (en) | Linear electric motors and integrated control chip | |
| CN202915880U (en) | Non-contact displacement sensor | |
| Yoshida et al. | Enhancement of thin air jets produced by ring-shaped dielectric barrier discharges using an auxiliary electrode | |
| CN114295404B (en) | Linear motor performance test method | |
| CN205509828U (en) | Quick response linear electric motor | |
| CN205509829U (en) | Stroke controlling means and linear electric motor | |
| Zhu et al. | A Novel Single Helix Magnetic Lead Screw for Wave Energy Converter | |
| Krein et al. | Harmonic effects in electrostatic induction motors | |
| CN105610297B (en) | Travel control device and linear motor | |
| CN105591519A (en) | Quick response linear motor, control method thereof, and integrated control chip | |
| RU2716601C2 (en) | Electromagnetic method of measuring flow rate of liquid metal | |
| Raju et al. | Mathematical modeling of linear induction motor | |
| CN110017959A (en) | The method for carrying out micro-vibration simulation using voice coil-type linear motor | |
| Heinicke et al. | Towards local resolution measurements in turbulent liquid metal duct flows | |
| Wang et al. | A passive sensing-wireless transmitting scheme demonstrated by integrating a magnetic cantilever with a microstrip patch for DC current monitoring |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |