CN204990924U - Vortex flow demonstration and measuring device - Google Patents
Vortex flow demonstration and measuring device Download PDFInfo
- Publication number
- CN204990924U CN204990924U CN201520539312.XU CN201520539312U CN204990924U CN 204990924 U CN204990924 U CN 204990924U CN 201520539312 U CN201520539312 U CN 201520539312U CN 204990924 U CN204990924 U CN 204990924U
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- vortex flow
- measurement mechanism
- conductor
- demonstration
- performance magnet
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Abstract
The utility model provides a vortex flow demonstration and measuring device, includes high performance magnet, connect the motor of drive high performance magnet motion, connection control motor rotation number's poleless speed adjusting switch, set up conductor and hall speedometer in high performance magnet magnetic field. The utility model discloses a rotational speed of poleless speed adjusting switching regulator motor, and then can control the change of high performance magnet magnetic flux, the magnetism of high performance magnet is fixed, but under the different rotational speeds, the change of magnetic flux is different, the change volume of magnetic flux can reach through the conversion of rotational speed, the size measurement that makes the vortex flow becomes simple, the change relation of vortex flow and magnetic flux is probed more easily, also direct convert the rotational speed value of accessible software algorithm reachs whirlpool current value, direct read, can be when the demonstration vortex flow forms, the accuracy reachs whirlpool current value, make the student understand vortex flow and faraday law of electromagnetic induction more easily, improve the interest that the student study physics, and has good value of popularization.
Description
Technical field
The utility model relates to a kind of teaching demonstration instrument, particularly a kind of vortex flow demonstration and measurement mechanism.
Background technology
Vortex flow demonstrator, for demonstrating the formation of vortex flow, understands vortex flow to student and Faraday's electromagnetic induction law has good help in the physics teaching in middle school, is one significantly demonstration instrument for teaching.Vortex flow be when bulk conductor to be placed in the magnetic field that vary or relative to Movement in Magnetic Field time, in this block conductor, also there will be vortex flow.Because conductor can form loop everywhere, any loop surround area magnetic flux all in change, therefore, this electric current closes voluntarily in conductor, forms vortex shape, therefore is called vortex flow.The size of vortex flow, is decided by the resistance value in this loop.When it is opened a way, even if there is induced voltage, electric current also equals zero.When it is closed circuit, electric current is maximum, even may burn circuit.In theory, a reometer of contacting in this loop, just can see current indication.But in order to protect ammeter and circuit, a variable resistor of contacting, is progressively adjusted to minimum from maximal value, then reading numerical values.So according to Ohm law, at resistance two termination voltage table.But because value is very little, an amplifier can be installed, then measures output voltage, then be converted into the electric current of input end.The circuit of such design principle is can obtain vortex flow accurately, but the vortex flow numerical value produced under different rotating speeds for magnet is in this way not easy to measure.
Utility model content
Fundamental purpose of the present utility model is the shortcoming overcoming prior art, while a kind of can formation demonstrating vortex flow is provided, accurately draw vortex flow numerical value, make student be easier to understand vortex flow and Faraday's electromagnetic induction law, improve vortex flow demonstration and the measurement mechanism of the interest of Students ' Learning physics.
The utility model adopts following technical scheme:
A kind of vortex flow demonstration and measurement mechanism, include high-performance magnet, connection driving the stepless time adjustment switch of the motor of high-performance magnet movement, connection control motor speed, being arranged at the conductor in high-performance magnetic field of magnets and the Hall tachometer gage for measuring rotating speed.
Further, described conductor adopts hollow cylindrical metal can.
Further, described conductor is rotatably arranged on a turning axle.
Further, described Hall tachometer gage includes two Hall elements for measuring motor and conductor rotating speed and digital display rotational speed table.
Further, described two Hall elements are arranged at conductor side and machine shaft side respectively.
Further, described vortex flow demonstration and measurement mechanism also include two mount pads for fixing two Hall elements.
Further, described high-performance magnetism Tie Tong crosses erecting frame and divides two groups to be symmetricly set on machine shaft.
From above-mentioned to description of the present utility model, compared with prior art, the beneficial effects of the utility model are: by the rotating speed of stepless time adjustment switch-mode regulation motor, and then the change of high-performance magnetism ferromagnetic flux can be controlled, the magnetic of high-performance magnet is fixing, but under different rotating speeds, the change of magnetic flux is different, the variable quantity of magnetic flux can be drawn by the conversion of rotating speed, the size measurement of vortex flow is made to become simple, the variation relation of vortex flow and magnetic flux is more easily probed into, also directly tachometer value is converted by software algorithm and draw vortex flow numerical value, can directly read.While demonstration vortex flow is formed, accurately can draw vortex flow numerical value, make student be easier to understand vortex flow and Faraday's electromagnetic induction law, improve the interest of Students ' Learning physics.Meanwhile, this device can be generalized to the application demonstrations such as " eddy current separating machine " and " eddy current test ", there is good promotional value.
Accompanying drawing explanation
Fig. 1 is the one-piece construction schematic diagram of the utility model embodiment.
In figure: 1. high-performance magnet, 2. motor, 3. stepless time adjustment switch, 4. conductor, 5. erecting frame, 6. turning axle, 7. Hall element, 8. digital display rotational speed table, 9. mount pad.
Embodiment
Below by way of embodiment, the utility model will be further described.
With reference to Fig. 1, a kind of vortex flow demonstration of the present utility model and measurement mechanism, include high-performance magnet 1, connection driving the stepless time adjustment switch 3 of the motor 2 of high-performance magnet 1 motion, connection control motor 2 rotating speed, being arranged at the conductor 4 in high-performance magnet 1 magnetic field and the Hall tachometer gage for measuring rotating speed.
Described high-performance magnet 1 is symmetricly set in motor 2 rotating shaft by erecting frame 5 points two groups.Described conductor 4 adopts hollow cylindrical metal can, is rotatably arranged on a turning axle 6.Described Hall tachometer gage includes two Hall elements 7 for measuring motor 2 and conductor 4 rotating speed and digital display rotational speed table 8.Described two Hall elements 7 are arranged by two mount pads 9, are arranged at conductor 4 side and motor 2 rotating shaft side respectively.
With reference to Fig. 1, when the utility model is used for vortex flow demonstration, the rotating speed of motor 2 is regulated by stepless time adjustment switch 3, and then the change of high-performance magnet 1 magnetic flux can be controlled, hollow cylindrical metallic conductor tank rotates under vortex flow effect, and the rotating speed of motor 2 rotating shaft and hollow cylindrical metallic conductor tank is measured respectively by two Hall elements 7, shown by digital display rotational speed table 8, converting by rotating speed draws vortex flow size.
Above are only an embodiment of the present utility model, but design concept of the present utility model is not limited thereto, all changes utilizing this design the utility model to be carried out to unsubstantiality, all should belong to the behavior of invading the utility model protection domain.
Claims (7)
1. vortex flow demonstration and a measurement mechanism, is characterized in that: include high-performance magnet, connection driving the stepless time adjustment switch of the motor of high-performance magnet movement, connection control motor speed, being arranged at the conductor in high-performance magnetic field of magnets and the Hall tachometer gage for measuring rotating speed.
2. a kind of vortex flow demonstration as claimed in claim 1 and measurement mechanism, is characterized in that: described conductor adopts hollow cylindrical metal can.
3. a kind of vortex flow demonstration as claimed in claim 2 and measurement mechanism, is characterized in that: described conductor is rotatably arranged on a turning axle.
4. a kind of vortex flow demonstration as claimed in claim 1 and measurement mechanism, is characterized in that: described Hall tachometer gage includes two Hall elements for measuring motor and conductor rotating speed and digital display rotational speed table.
5. a kind of vortex flow demonstration as claimed in claim 4 and measurement mechanism, is characterized in that: described two Hall elements are arranged at conductor side and machine shaft side respectively.
6. a kind of vortex flow demonstration as claimed in claim 5 and measurement mechanism, is characterized in that: also include two mount pads for fixing two Hall elements.
7. a kind of vortex flow demonstration as claimed in claim 1 and measurement mechanism, is characterized in that: described high-performance magnetism Tie Tong crosses erecting frame and divides two groups to be symmetricly set on machine shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520539312.XU CN204990924U (en) | 2015-07-23 | 2015-07-23 | Vortex flow demonstration and measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520539312.XU CN204990924U (en) | 2015-07-23 | 2015-07-23 | Vortex flow demonstration and measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204990924U true CN204990924U (en) | 2016-01-20 |
Family
ID=55125268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520539312.XU Expired - Fee Related CN204990924U (en) | 2015-07-23 | 2015-07-23 | Vortex flow demonstration and measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204990924U (en) |
-
2015
- 2015-07-23 CN CN201520539312.XU patent/CN204990924U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160120 Termination date: 20160723 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |