CN111665707A - Magnetic fluid hourglass experimental device with adjustable aging and time adjusting method thereof - Google Patents
Magnetic fluid hourglass experimental device with adjustable aging and time adjusting method thereof Download PDFInfo
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- CN111665707A CN111665707A CN202010567498.5A CN202010567498A CN111665707A CN 111665707 A CN111665707 A CN 111665707A CN 202010567498 A CN202010567498 A CN 202010567498A CN 111665707 A CN111665707 A CN 111665707A
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- G—PHYSICS
- G04—HOROLOGY
- G04F—TIME-INTERVAL MEASURING
- G04F1/00—Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals without driving mechanisms, e.g. egg timers
- G04F1/04—Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals without driving mechanisms, e.g. egg timers by movement or acceleration due to gravity
- G04F1/06—Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals without driving mechanisms, e.g. egg timers by movement or acceleration due to gravity by flowing-away of a prefixed quantity of fine-granular or liquid materials, e.g. sand-glass, water-clock
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Abstract
The magnetic fluid hourglass experimental device comprises an hourglass body, electromagnet coils are arranged at the upper end and the lower end of the hourglass body, magnetic fluid is filled in the hourglass body, the hourglass body is connected with a control box, a control circuit is arranged in the control box, the control circuit comprises a power supply, and the power supply is connected with a resistance regulator, a power switch and the electromagnet coils in series. According to the invention, the resistance value of the resistance regulator is regulated, so that the current of the control loop is regulated, the current can influence the magnetic field intensity generated by the electromagnet coil, and the magnetic field intensity can influence the falling time of the magnetic fluid, thereby completing the time adjustability of the magnetic fluid hourglass experimental device.
Description
Technical Field
The invention belongs to the field of hourglass, and particularly relates to a magnetic fluid hourglass experimental device with adjustable aging and a time adjusting method thereof.
Background
The problems of the common hourglass are as follows: the metering time is fixed, and the timing time cannot be adjusted. Chinese patent document CN 209118083U describes an "hourglass capable of adjusting the timing", which adopts a mechanical structure to adjust the time of sand blanking, and the method is not precise in adjusting the time.
The magnetic fluid is a novel functional material, and has the liquidity of liquid and the magnetism of a solid magnetic material. The colloidal liquid is a stable colloidal liquid formed by mixing magnetic solid particles with the diameter of nanometer level (less than 10 nanometers), base carrier liquid and surfactant. The fluid has no magnetic attraction in a static state, and shows magnetism under the action of an external magnetic field, so that the fluid has wide application in practice and high academic value in theory. The magnetic fluid produced by the nano metal and alloy powder has excellent performance, and can be widely applied to the fields of magnetic fluid sealing, shock absorption, medical instruments, sound regulation, optical display, magnetic fluid mineral separation and the like under various severe conditions.
Therefore, how to manufacture a time-adjustable hourglass by utilizing the characteristics of the magnetic fluid is a technical problem to be solved by the technical scheme, and the accuracy of time adjustment is a difficult problem to be overcome by the technical scheme.
Disclosure of Invention
In view of the technical problems in the background art, the time-effect-adjustable magnetic fluid hourglass experimental device and the time adjusting method thereof adjust and control the loop current by adjusting the resistance value of the resistance adjuster, the current can influence the magnetic field intensity generated by the electromagnet coil, the magnetic field intensity can influence the falling time of the magnetic fluid, and the time adjustability of the magnetic fluid hourglass experimental device is completed.
In order to solve the technical problems, the invention adopts the following technical scheme to realize:
the magnetic fluid hourglass experimental device comprises an hourglass body, electromagnet coils are arranged at the upper end and the lower end of the hourglass body, magnetic fluid is filled in the hourglass body, the hourglass body is connected with a control box, a control circuit is arranged in the control box, the control circuit comprises a power supply, and the power supply is connected with a resistance regulator, a power switch and the electromagnet coils in series.
In a preferred scheme, the resistance regulator is a knob type resistance regulator, and the knob type resistance regulator is used for regulating the current of the electromagnet coil.
In the preferred scheme, a vibration prompting module is arranged in the control box and is electrically connected with the single chip microcomputer, the single chip microcomputer is electrically connected with the two gravity sensors respectively, the two gravity sensors are arranged on the inner walls of the two ends of the hourglass body respectively, and the gravity sensors are used for detecting the weight of the magnetic fluid.
In a preferred scheme, the vibration prompting module is arranged in parallel with a power supply.
In a preferable scheme, the magnetic fluid hourglass experimental device with adjustable and controllable aging and the time adjusting method thereof comprise the following steps:
the method comprises the following steps: the magnetic fluid (3) in the hourglass body (1) is in a constant magnetic field, and the closed loop integral of the magnetic fluid is only equal to the conduction current I of a loop-connected loop0In relation to the magnetic field intensity of the electromagnet in different magnetic sandglass under different currents can be calculated through a formula ①;
M＝χmH ③
middle X typemMagnetic susceptibility of magnetofluid medium, M is magnetization, mu0Is the magnetic permeability in vacuum, I0Mu is the conduction current of the loop chain, and mu is the magnetic permeability of the magnetic particles;
step two: in the magnetic field, the magnetic force applied to the magnetic particles is:
wherein μ is the magnetic permeability of the magnetic fine particles,
is the magnetic field strength at the location of the magnetic particles, Δ V is the volume of the magnetic particles, XmIs the magnetic susceptibility of the magnetic particles;
if the height of the magnetic fluid hourglass body is H, the mass of the magnetic fluid is m, and the falling time of the magnetic fluid is T, a formula is established
And also formula
The acceleration a can be determined
Then
Step three: according to a formula, magnetic field force borne by the magnetic fluid in the magnetic hourglass can be calculated, so that stress analysis of the magnetic fluid is carried out, acceleration of the magnetic fluid is further obtained, then a formula is obtained, falling time of the magnetic fluid under different magnetic fields formed by different currents is obtained on the basis of a statistical principle of a test, and a curve corresponding to the magnetic field intensity is drawn;
the tests were performed using statistics:
1) assembling circuit elements according to the installation instruction, and turning on a power supply;
2) changing the resistance value of the control resistor, opening a switch, recording the falling time of the magnetic fluid, repeating the experiment for multiple times, recording experiment data, and filling the experiment data into a table;
step four: the resistance value of the resistance regulator is changed, so that the field current is changed, the effect of changing the magnetic field intensity of the circuit is achieved, multiple experiments are carried out, and the corresponding relation between the resistance value of the resistance regulator and the timing time of the magnetic fluid hourglass experiment device is recorded.
This patent can reach following beneficial effect:
this technical scheme is through adjusting resistance regulator resistance value size to adjust control loop current size, the current size can influence the magnetic field intensity size that the electro-magnet coil produced, and magnetic field intensity can influence magnetic current body whereabouts time, thereby has accomplished magnetic current body hourglass experimental apparatus's time adjustability.
The invention deduces the curve chart of the relationship between the magnetic field intensity and the timing time through four formulas, the magnetic field intensity is influenced by the current, and the current and the resistance are in inverse proportion, thus summarizing the comparison table corresponding to the hourglass time under different gears, and further solving the problem of controllable hourglass time.
Drawings
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
FIG. 1 is a structural diagram of a magnetofluid hourglass experimental device according to the invention;
FIG. 2 is a circuit diagram of the present invention;
FIG. 3 is a block diagram of the gravity sensor, the single chip and the vibration prompt module;
FIG. 4 is a graph of the magnetic field strength versus timing according to the present invention;
FIG. 5 is a graph of current at 220V and the fall time of the magnetic fluid according to the present invention.
In the figure: hourglass body 1, control box 2, magnetic fluid 3, gravity sensor 4, power 5, vibrations suggestion module 6, knob formula resistance regulator 7, electro-magnet coil 8.
Detailed Description
The preferable scheme is as shown in fig. 1 to 3, the magnetofluid hourglass experimental device with adjustable and controllable aging and the time adjusting method thereof comprise an hourglass body 1, electromagnet coils 8 are arranged at the upper end and the lower end of the hourglass body 1, magnetofluid 3 is arranged in the hourglass body 1, the hourglass body 1 is connected with a control box 2, a control circuit is arranged in the control box 2, the control circuit comprises a power supply 5, and the power supply 5 is connected with a resistance regulator, a power switch and the electromagnet coils 8 in series. The control box 2 can be optionally arranged at the upper end or the lower end of the hourglass body 1. The hourglass body 1 is made of high-transmittance acrylic materials, so that magnetic lines of force can pass through the hourglass body, and the measurement is more accurate. This technical scheme is through adjusting resistance regulator resistance value size to adjust control loop current size, the electric current size can influence the magnetic field intensity size that electromagnet coil 8 produced, and magnetic field intensity can influence 3 whereabouts times of magnetic current body, thereby has accomplished the time adjustability of magnetic current body hourglass experimental apparatus.
Further, the resistance regulator is a knob type resistance regulator 7, and the knob type resistance regulator 7 is used for regulating the current of the electromagnet coil 8.
Further, be equipped with vibrations suggestion module 6 in the control box 2, vibrations suggestion module 6 is connected with the singlechip electricity, and the singlechip is connected with two gravity sensor 4 electricity respectively, and two gravity sensor 4 set up respectively in 1 both ends inner wall department of hourglass body, and gravity sensor 4 is used for detecting 3 weights of magnetic current body. The gravity sensor 4 adopts a diaphragm sensor, and the model number of the gravity sensor is ZNM-12T; the type of the singlechip is as follows: 51 single chip microcomputer (IMX6 ULL); the vibration prompting module 6 adopts the model of SW-420.
Further, the vibration prompting module 6 is used for being arranged in parallel with the power supply 5. Install gravity sensor 4 additional for preferred technical scheme, after the magnetic current body falls down completely, the pressure value that gravity sensor 4 detected reaches the threshold value, and the singlechip is handled the back, gives vibrations suggestion module 6 a digital signal, makes vibrations suggestion module 6 vibrations to the suggestion hourglass timing finishes.
In a preferable scheme, the magnetic fluid hourglass experimental device with adjustable and controllable aging and the time adjusting method thereof comprise the following steps:
the method comprises the following steps: the magnetic fluid (3) in the hourglass body (1) is in a constant magnetic field, and the closed loop integral of the magnetic fluid is only equal to the conduction current I of a loop-connected loop0In relation to the magnetic field intensity of the electromagnet in different magnetic sandglass under different currents can be calculated through a formula ①;
magnetic field intensity
M＝χmH ③
Middle X typemMagnetic susceptibility of magnetofluid medium, M is magnetization, mu0Is the magnetic permeability in vacuum, I0Mu is the conduction current of the loop chain, and mu is the magnetic permeability of the magnetic particles;
step two: in the magnetic field, the magnetic force applied to the magnetic particles is:
wherein μ is the magnetic permeability of the magnetic fine particles,
is the magnetic field strength at the location of the magnetic particles, Δ V is the volume of the magnetic particles, XmIs the magnetic susceptibility of the magnetic particles;
if the height of the magnetic fluid hourglass body is H, the mass of the magnetic fluid is m, and the falling time of the magnetic fluid is T, a formula is established
And also formula
The acceleration a can be determined
Then
Step three: according to a formula, magnetic field force borne by the magnetic fluid in the magnetic hourglass can be calculated, so that stress analysis of the magnetic fluid is carried out, acceleration of the magnetic fluid is further obtained, then a formula is obtained, falling time of the magnetic fluid under different magnetic fields formed by different currents is obtained on the basis of a statistical principle of a test, and a curve corresponding to the magnetic field intensity is drawn;
the tests were performed using statistics:
1) assembling circuit elements according to the installation instruction, and turning on a power supply;
2) changing the resistance value of the control resistor, opening a switch, recording the falling time of the magnetic fluid, repeating the experiment for multiple times, recording experiment data, and filling the experiment data into a table;
step four: the resistance value of the resistance regulator is changed, so that the field current is changed, the effect of changing the magnetic field intensity of the circuit is achieved, multiple experiments are carried out, and the corresponding relation between the resistance value of the resistance regulator and the timing time of the magnetic fluid hourglass experiment device is recorded.
As shown in fig. 5, a corresponding relationship diagram between the current at 220v and the falling time of the magnetic fluid is selected, and then the corresponding relationship between the resistance and the falling time of the magnetic fluid is obtained according to the relationship between the current and the voltage. Therefore, different gears can be summarized (the gears can be characterized by resistance or current).
The relationship between current and voltage is: and I is U/R, wherein R represents the resistance value of the knob type resistance regulator 7. Then deducing a current and resistance size comparison table:
| power supply/control resistor | 1000 ohm | 2000 ohm | 3000 ohm | 4000 ohm |
| 6V | 0.006A | 0.003A | 0.002A | 0.0015A |
| 8v | 0.008A | 0.004A | 0.0026A | 0.002A |
| 10v | 0.01A | 0.005A | 0.003A | 0.0025A |
| 110v | 0.11A | 0.055A | 0.037A | 0.0275A |
| 220v | 0.22A | 0.11A | 0.074A | 0.055A |
Claims (5)
1. The utility model provides a magnetic fluid hourglass experimental apparatus of ageing can be regulated and control, includes hourglass body (1), its characterized in that: the upper end and the lower end of the hourglass body (1) are respectively provided with an electromagnet coil (8), a magnetic fluid (3) is arranged in the hourglass body (1), the hourglass body (1) is connected with the control box (2), a control circuit is arranged in the control box (2), the control circuit comprises a power supply (5), and the power supply (5) is connected with the resistance regulator, the power switch and the electromagnet coils (8) in series.
2. The adjustable aging magnetic fluid hourglass experimental device according to claim 1, wherein: the resistance regulator is a knob type resistance regulator (7), and the knob type resistance regulator (7) is used for regulating the current of the electromagnet coil (8).
3. The adjustable aging magnetic fluid hourglass experimental device according to claim 1, wherein: the control box (2) is internally provided with a vibration prompting module (6), the vibration prompting module (6) is electrically connected with the single chip microcomputer, the single chip microcomputer is electrically connected with the two gravity sensors (4), the two gravity sensors (4) are arranged on the inner walls of the two ends of the hourglass body (1) respectively, and the gravity sensors (4) are used for detecting the weight of the magnetic fluid (3).
4. The adjustable aging magnetic fluid hourglass experimental device according to claim 3, wherein the adjustable aging magnetic fluid hourglass experimental device is characterized in that: the vibration prompt module (6) is used for being connected with the power supply (5) in parallel.
5. The controllable aging magnetofluid hourglass experimental device and the time adjusting method thereof according to any one of claims 1 to 4, characterized by comprising the following steps:
the method comprises the following steps: the magnetic fluid (3) in the hourglass body (1) is in a constant magnetic field, and the closed loop integral of the magnetic fluid is only equal to the conduction current I of a loop-connected loop0Related to, can be obtained throughThe formula ① calculates the magnetic field strength of the electromagnet in different magnetic sandglass under different currents;
∮LH·dl＝∑I0①
magnetic field intensity
M＝χmH ③
Middle X typemMagnetic susceptibility of magnetofluid medium, M is magnetization, mu0Is the magnetic permeability in vacuum, I0Mu is the conduction current of the loop chain, and mu is the magnetic permeability of the magnetic particles;
step two: in the magnetic field, the magnetic force applied to the magnetic particles is:
wherein μ is the magnetic permeability of the magnetic fine particles,
is the magnetic field strength at the location of the magnetic particles, Δ V is the volume of the magnetic particles, XmIs the magnetic susceptibility of the magnetic particles;
if the height of the magnetic fluid hourglass body is H, the mass of the magnetic fluid is m, and the falling time of the magnetic fluid is T, a formula is established
And also formula
The acceleration a can be determined
Then
Step three: according to a formula, magnetic field force borne by the magnetic fluid in the magnetic hourglass can be calculated, so that stress analysis of the magnetic fluid is carried out, acceleration of the magnetic fluid is further obtained, then a formula is obtained, falling time of the magnetic fluid under different magnetic fields formed by different currents is obtained on the basis of a statistical principle of a test, and a curve corresponding to the magnetic field intensity is drawn;
the tests were performed using statistics:
1) assembling circuit elements according to the installation instruction, and turning on a power supply;
2) changing the resistance value of the control resistor, opening a switch, recording the falling time of the magnetic fluid, repeating the experiment for multiple times, recording experiment data, and filling the experiment data into a table;
step four: the resistance value of the resistance regulator is changed, so that the field current is changed, the effect of changing the magnetic field intensity of the circuit is achieved, multiple experiments are carried out, and the corresponding relation between the resistance value of the resistance regulator and the timing time of the magnetic fluid hourglass experiment device is recorded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010567498.5A CN111665707A (en) | 2020-06-19 | 2020-06-19 | Magnetic fluid hourglass experimental device with adjustable aging and time adjusting method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010567498.5A CN111665707A (en) | 2020-06-19 | 2020-06-19 | Magnetic fluid hourglass experimental device with adjustable aging and time adjusting method thereof |
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| CN111665707A true CN111665707A (en) | 2020-09-15 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2555513A (en) * | 1948-02-16 | 1951-06-05 | Jr Edmund O Schweitzer | Magnetic time-delay mechanism |
| CN102680356A (en) * | 2012-05-25 | 2012-09-19 | 东北大学 | Density measuring device and method based on electromagnetic suspension |
| WO2013072412A1 (en) * | 2011-11-15 | 2013-05-23 | Novo Nordisk A/S | A magnetic time delay indicator and an injection device incorporating such |
| CN103412473A (en) * | 2013-08-28 | 2013-11-27 | 上海市闵行第二中学 | Hourglass device allowing time regulation |
| CN205862115U (en) * | 2016-07-05 | 2017-01-04 | 广东万品端室内设计有限公司 | Music sandglass |
| CN208444151U (en) * | 2018-04-09 | 2019-01-29 | 曾俊琳 | One kind can stop hourglass |
-
2020
- 2020-06-19 CN CN202010567498.5A patent/CN111665707A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2555513A (en) * | 1948-02-16 | 1951-06-05 | Jr Edmund O Schweitzer | Magnetic time-delay mechanism |
| WO2013072412A1 (en) * | 2011-11-15 | 2013-05-23 | Novo Nordisk A/S | A magnetic time delay indicator and an injection device incorporating such |
| CN102680356A (en) * | 2012-05-25 | 2012-09-19 | 东北大学 | Density measuring device and method based on electromagnetic suspension |
| CN103412473A (en) * | 2013-08-28 | 2013-11-27 | 上海市闵行第二中学 | Hourglass device allowing time regulation |
| CN205862115U (en) * | 2016-07-05 | 2017-01-04 | 广东万品端室内设计有限公司 | Music sandglass |
| CN208444151U (en) * | 2018-04-09 | 2019-01-29 | 曾俊琳 | One kind can stop hourglass |
Non-Patent Citations (1)
| Title |
|---|
| 周志坚: "《大学物理教程》", 31 January 2018, 四川大学出版社 * |
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Application publication date: 20200915 |