CN109270292B - Electromagnetic induction water flow velocity measuring device and speed measuring method thereof - Google Patents
Electromagnetic induction water flow velocity measuring device and speed measuring method thereof Download PDFInfo
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- CN109270292B CN109270292B CN201811354215.8A CN201811354215A CN109270292B CN 109270292 B CN109270292 B CN 109270292B CN 201811354215 A CN201811354215 A CN 201811354215A CN 109270292 B CN109270292 B CN 109270292B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
- G01P5/08—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring variation of an electric variable directly affected by the flow, e.g. by using dynamo-electric effect
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
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- Measuring Volume Flow (AREA)
Abstract
The utility model relates to a testing device for measuring water flow rate by electromagnetic induction and a speed measuring method thereof, belonging to the technical field of testing. Comprises a fixing frame, a speed measuring device, a cylindrical magnet, a wire, a circuit system and a computer system. The fixed frame is fixed with speed measuring device, and speed measuring device includes three toper flabellum, rotary rod, barrel and slender rod, is provided with cylindricality magnet and twines the interior barrel that has the wire in the barrel, and speed measuring device passes through the wire and is connected with circuit system, and circuit system is connected with computer system. The utility model considers the water flow velocity at different positions such as steady state or unsteady state, radius, water flow depth and the like, and solves the water flow velocity test simulation problem in the marine environment.
Description
Technical Field
The utility model relates to a testing device, in particular to a testing device for measuring water flow rate by electromagnetic induction and a speed measuring method thereof, belonging to the technical field of testing.
Background
Li Dawang et al, CN201420084216.6, entitled "a marine reinforced concrete natural rust simulator", simulates a marine environment and can be used as a corrosive environment for model experiments, wherein the simulator employs a stirring vessel, as shown in fig. 1, wherein 30 is a stirring vessel, 31 is a propeller, and 32 is a motor. The device generates motion to the rotation of water flow by utilizing a propeller to form a vortex so as to generate true motional infiltration corrosion to reinforced concrete, but the device does not give a specific marine environment background, for example, the water flow speed on the surface of the concrete is not obtained, and the device cannot be connected with a true environment.
Disclosure of Invention
Aiming at the problems, the utility model provides a testing device for measuring the water flow rate by electromagnetic induction and a speed measuring method thereof, which are used for testing the speed of ocean environment water flow. The water flow speed at different positions such as a steady state or an unsteady state, a radius, a water flow depth and the like is considered, so that the problem of the water flow speed under the test simulation marine environment is solved, and the adjustment is performed so as to be matched with the real environment.
In order to solve the technical problems, the utility model adopts the following technical scheme:
the device comprises a fixing frame, a speed measuring device, a cylindrical magnet, a wire, a circuit system and a computer system; the fixing frame comprises a cross positioned at the top of the stirring container, a round hole is formed in the center of the cross, a supporting rod is vertically arranged in the round hole, a plurality of telescopic rods which can be optionally telescopic are horizontally and transversely arranged at the lower end of the supporting rod, a speed measuring device is fixed at the end part of each telescopic rod, the speed measuring device is connected with a circuit system through a wire, and the circuit system is connected with a computer system; the speed measuring device comprises three conical fan blades, a rotating rod, a cylindrical barrel and an elongated rod; the three conical fan blades are arranged at one end of a rotating rod, the other end of the rotating rod is rotatably connected to the cylindrical barrel, an elongated rod is fixedly arranged at the other side of the cylindrical barrel, and the elongated rod is fixed at the end part of the telescopic rod; the column barrel comprises an outer column barrel and an inner column barrel, wherein the outer column barrel comprises an upper plate, a lower plate and side plates; bearings are arranged at the centers of the upper plate and the lower plate and used for installing a rotating rod; the inner cylindrical barrel is wound with a wire, an inner cylindrical hole is formed in the center of the inner cylindrical barrel, a rotary rod is inserted into the inner cylindrical hole, wire small grooves are uniformly formed in the inner wall of the inner cylindrical hole and the edge of the outer wall of the inner cylindrical barrel, and the wire is arranged in the wire small grooves; and a cylindrical magnet is tightly embedded in the rotary rod in the inner column hole of the inner column barrel.
Further, the upper plate, the lower plate and the side plates are all screwed by bolts.
Further, the lower plate and the slender rod are provided with a wire channel, and the slender rod can be used for guiding out wires.
Further, the inner diameter of the rotating rod is larger than the diameter of the cylindrical magnet, the cylindrical magnet is cylindrical, the surface of the cylindrical magnet is rough, and the magnets are unevenly distributed.
Further, the circuitry includes a sense resistor element and an ammeter connected in series.
Further, the support rod is a freely telescopic support rod.
Further, the cross is welded together by four square hollow iron pipes, and is supported by armpits between every two.
Further, the telescopic rods are two horizontally arranged in parallel.
The speed measuring method of the electromagnetic induction water flow speed measuring device comprises the following steps:
step one: firstly, winding a wire on an inner cylindrical barrel, tightly embedding a cylindrical magnet in a rotary rod, connecting a lower plate and a side plate of an outer cylindrical barrel by bolts, guiding out two ends of the wire from a wire channel, installing the cylindrical magnet, and then installing an upper plate, thereby completing the installation of the whole speed measuring device;
step two: the cross is fixed on the stirring container, then the slender rod is fixed on the two telescopic rods, and the conical fan blades of the speed measuring device can be accurately placed at the position of the measured target point by adjusting the water inlet depth of the slender rod, the telescopic lengths of the two telescopic rods and the rotation angle of the supporting rod, so that the flow velocity of any position in the stirring container can be measured;
step three: the two ends of the lead are connected into a circuit system by adopting a lead channel;
step four: placing the speed measuring device in the stirring container, starting a computer system, and closing a loop; when the uneven cylindrical magnet rotates, magnetic field lines of different magnetic fields generated by the uneven cylindrical magnet can cut wires, current can be generated in a loop, and the size and the direction of the current can be detected and recorded by a computer system, so that the size of water flow and the rotating direction of the conical fan blades can be obtained.
Compared with the prior art, the utility model has the following technical effects:
the utility model considers the water flow velocity at different positions such as steady state or unsteady state, radius, water flow depth and the like, and better solves the water flow velocity problem under the test simulation marine environment, thereby achieving better fit with the real environment through adjustment.
Drawings
FIG. 1 is a schematic diagram of a prior art simulation apparatus;
FIG. 2 is a schematic diagram of a testing device for electromagnetic induction water flow rate measurement according to the present utility model;
FIG. 3 is a schematic view of a holder;
FIG. 4 is a schematic diagram of a speed measuring device;
FIG. 5 is a schematic diagram of a barrel;
FIG. 6 is a cross-sectional view of FIG. 5;
FIG. 7 is a top view of FIG. 5;
FIG. 8 is a schematic view of an inner barrel;
FIG. 9 is a side view of FIG. 8;
FIG. 10 is a top view of FIG. 8;
FIG. 11 is a schematic view of a cylindrical magnet;
fig. 12 is a schematic diagram of a circuit system connection.
Detailed Description
The following describes the embodiments of the present utility model in further detail with reference to the accompanying drawings.
As shown in fig. 1-12, the electromagnetic induction water flow rate testing device of the present utility model comprises a fixing frame, a speed measuring device, a cylindrical magnet, a wire, a circuit system 20 and a computer system 21, as shown in fig. 2. The fixing frame comprises a cross 1 positioned at the top of the stirring container. As shown in fig. 3, the cross 1 is welded together by four square hollow iron pipes while being supported by armpits between every two. The center of the cross 1 is provided with a round hole, a supporting rod 2 which is freely telescopic and similar to a radio antenna is vertically arranged in the round hole, two telescopic rods 3 which are horizontally and parallelly arranged and can be freely telescopic and similar to the antenna are horizontally and horizontally arranged at the lower end of the supporting rod 2, a speed measuring device is fixed at the end part of each telescopic rod 3, the speed measuring device is connected with a circuit system 20 through a wire 18, and the circuit system 20 is connected with a computer system 21. The speed measuring device comprises three conical fan blades 5, a rotating rod 6, a cylindrical barrel 7 and an elongated rod 4, as shown in fig. 4. Three toper flabellum 5 set up in the one end of rotary rod 6, and the rotary rod 6 other end rotatable coupling is on barrel 7, and barrel opposite side is fixed to be provided with slender rod 4, and slender rod is fixed at telescopic link 3 tip. As shown in fig. 5 to 7, the tub 7 includes an outer tub 8 and an inner tub 9, and the outer tub 8 includes an upper plate 12, a lower plate 14, and side plates 13. The upper plate 12, the lower plate 14 and the side plates 13 are all screwed by bolts 10. The centers of the upper plate 12 and the lower plate 14 are each provided with a bearing 11 for mounting the rotating lever 6. As shown in fig. 8-10, a wire 18 is wound on the inner barrel 9, an inner post hole 17 is arranged in the center of the inner barrel 9, a rotary rod 6 is inserted in the inner post hole 17, wire small grooves are uniformly formed in the inner wall of the inner post hole 17 and the edge of the outer wall of the inner barrel 9, and the wire 18 is arranged in the wire small grooves. The lower plate 14 and the elongated rod 4 are provided with a wire passage 15 for guiding out the wire 18 by the elongated rod 4. As shown in fig. 11, a cylindrical magnet 19 is tightly embedded in the rotary rod 6 in the cylindrical hole in the inner cylindrical barrel. The inner diameter of the rotating rod 6 is larger than the diameter of the cylindrical magnet 19, the cylindrical magnet 19 is cylindrical, the surface of the cylindrical magnet is rough, and the magnet is unevenly distributed. As shown in fig. 12, the circuit system 20 includes a sense resistor element R1 and an ammeter a connected in series.
The speed measuring method of the electromagnetic induction water flow velocity measuring device comprises the following steps:
step one: firstly, a wire 18 is wound on an inner cylindrical barrel 9, a cylindrical magnet 19 is tightly embedded in a rotary rod 6, a lower plate 14 and a side plate 13 of an outer cylindrical barrel 8 are connected through bolts, two ends of the wire 18 are led out from a wire channel 15, after the cylindrical magnet 19 is installed, an upper plate 12 is installed, and the whole speed measuring device is installed.
Step two: the cross 1 is fixed on the stirring container 30, the slender rod 4 is fixed on the two telescopic rods 3, and the conical fan blade 5 of the speed measuring device can be accurately placed at the position of the measured target point by adjusting the water inlet depth of the slender rod 4, the telescopic lengths of the two telescopic rods 3 and the rotation angle of the supporting rod 2, so that the flow velocity at any position in the stirring container 30 can be measured.
Step three: both ends of the lead-out wire 18 are connected to the circuitry 20 using the wire channel 15.
Step four: the speed measuring device is placed in the stirring container 30, the computer system 21 is started, and the loop is closed. Wherein, when the non-uniform cylindrical magnet 19 rotates, the magnetic field lines of different magnetic fields generated will cut the conducting wire 18, and current will be generated in the loop, and the magnitude and direction of the current can be detected and recorded by the computer system 21, thus the magnitude of the water flow and the rotation direction of the conical fan blades 5 can be obtained.
The speed measuring device can be placed in an annular opening pipe with known flow rate, the computer system 21 records the current at different flow rates in real time, and the rotation direction of the fan blade of the speed measuring device is observed to determine the swinging direction of the ammeter. In actual measurement, the water speed and the rotation direction of the fan blade can be obtained through conversion of the obtained current and the swinging direction of the pointer of the ammeter.
The foregoing embodiments are merely illustrative of the technical solutions of the present utility model and are not intended to limit the present utility model, and variations of the technical solutions of the present utility model according to common knowledge in the art are within the scope of the present utility model, and in any case, the foregoing embodiments are merely illustrative, and the scope of the present utility model is defined by the scope of the appended claims.
Claims (4)
1. The utility model provides a speed measurement method of a testing device for measuring water flow rate through electromagnetic induction, wherein the testing device comprises a fixing frame, a speed measurement device, a cylindrical magnet, a wire, a circuit system (20) and a computer system (21); the fixing frame comprises a cross (1) positioned at the top of the stirring container, a round hole is formed in the center of the cross (1), a supporting rod (2) is vertically arranged in the round hole, a plurality of telescopic rods (3) which can be optionally telescopic are horizontally and transversely arranged at the lower end of the supporting rod (2), a speed measuring device is fixed at the end part of each telescopic rod (3), the speed measuring device is connected with a circuit system (20) through a wire (18), and the circuit system (20) is connected with a computer system (21); the speed measuring device comprises three conical fan blades (5), a rotating rod (6), a cylindrical barrel (7) and an elongated rod (4); the three conical fan blades (5) are arranged at one end of a rotating rod (6), the other end of the rotating rod (6) is rotatably connected to the cylindrical barrel (7), an elongated rod (4) is fixedly arranged at the other side of the cylindrical barrel, and the elongated rod is fixed at the end part of the telescopic rod (3); the column barrel (7) comprises an outer column barrel (8) and an inner column barrel (9), and the outer column barrel (8) comprises an upper plate (12), a lower plate (14) and a side plate (13); the centers of the upper plate (12) and the lower plate (14) are provided with bearings (11) for installing a rotating rod (6); the inner column barrel (9) is wound with a wire (18), an inner column hole (17) is formed in the center of the inner column barrel (9), a rotary rod (6) is inserted into the inner column hole (17), wire small grooves are uniformly formed in the inner wall of the inner column hole (17) and the edge of the outer wall of the inner column barrel (9), and the wire (18) is arranged in the wire small grooves; a cylindrical magnet (19) is tightly embedded in the rotating rod (6) in the inner column hole of the inner column barrel; the upper plate (12), the lower plate (14) and the side plates (13) are all screwed up by bolts; the lower plate (14) and the slender rod (4) are provided with a wire channel (15), and the slender rod (4) can be used for guiding out a wire (18); the inner diameter of the rotary rod (6) is larger than the diameter of the cylindrical magnet (19), the cylindrical magnet (19) is a cylinder, the surface of the cylindrical magnet is rough, and the magnets are unevenly distributed; the circuitry (20) includes a sense resistor element (R1) and an ammeter (a) connected in series;
the speed measuring method is characterized by comprising the following steps of:
step one: firstly, winding a wire (18) on an inner cylindrical barrel (9), tightly embedding a cylindrical magnet (19) in a rotary rod (6), connecting a lower plate (14) of an outer cylindrical barrel (8) with a side plate (13) by bolts, simultaneously guiding out two ends of the wire (18) from a wire channel (15), installing the cylindrical magnet (19), and then installing an upper plate (12), thus completing the installation of the whole speed measuring device;
step two: firstly, fixing a cross (1) on a stirring container (30), then fixing an elongated rod (4) on two telescopic rods (3), and accurately placing a conical fan blade (5) of a speed measuring device at a measured target point position by adjusting the water entering depth of the elongated rod (4), the telescopic lengths of the two telescopic rods (3) and the rotation angle of a supporting rod (2) so as to measure the flow velocity at any position in the stirring container (30);
step three: two ends of the lead (18) are connected into a circuit system (20) by adopting a lead channel (15);
step four: placing the speed measuring device in a stirring container (30), starting a computer system (21), and closing a loop; wherein, when the uneven cylindrical magnet (19) rotates, the magnetic field lines of different magnetic fields generated cut the lead (18), current is generated in the loop, and the magnitude and direction of the current can be detected and recorded by the computer system (21), thereby obtaining the magnitude of the water flow and the rotating direction of the conical fan blades (5).
2. The method of claim 1, wherein: the support rod (2) is a support rod which can freely stretch and retract.
3. The speed measurement method according to claim 2, wherein: the cross (1) is welded together by four square hollow iron pipes, and is supported by armpits between every two.
4. A method of measuring speed according to claim 3, wherein: the number of the telescopic rods (3) is two which are horizontally arranged in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811354215.8A CN109270292B (en) | 2018-11-14 | 2018-11-14 | Electromagnetic induction water flow velocity measuring device and speed measuring method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811354215.8A CN109270292B (en) | 2018-11-14 | 2018-11-14 | Electromagnetic induction water flow velocity measuring device and speed measuring method thereof |
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| Publication Number | Publication Date |
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| CN109270292A CN109270292A (en) | 2019-01-25 |
| CN109270292B true CN109270292B (en) | 2023-09-01 |
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| CN114609408B (en) * | 2022-01-27 | 2023-09-19 | 浙江水利水电学院 | Multifunctional water flow speed measuring device |
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