CN204990937U - Multi -purpose presentation device of controllable ampere force directly perceived - Google Patents
Multi -purpose presentation device of controllable ampere force directly perceived Download PDFInfo
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- CN204990937U CN204990937U CN201520707468.4U CN201520707468U CN204990937U CN 204990937 U CN204990937 U CN 204990937U CN 201520707468 U CN201520707468 U CN 201520707468U CN 204990937 U CN204990937 U CN 204990937U
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Abstract
The utility model provides a multi -purpose presentation device of controllable ampere force directly perceived, including the wire of setting in the homogeneous magnetic field, the both ends of wire are the both ends of power connection respectively, the homogeneous magnetic field produce by the horse -shoe magnet of vertical setting in the pressure disc balance pan of steelyard, the segment table that stretches into in the horse -shoe magnet magnetic field in by the coil of wire show, the coil rotatably set up in a portal crane, the pressure disc weighing -appliance have the numerical digital display screen of pressure who show to add in its pan of steelyard. This controllable ampere force presentation device directly perceived can see the variation in pressure of applying on the hang scoop scale through the display screen of pressure disc balance directly perceivedly to the student understands.
Description
Art
The utility model relates to physical teaching aid field, particularly a kind of intuitively controlled ampere force presentation device.
Background technology
In Process of Physics Teaching in Middle School, need to design some teaching aids, by using these old-age groups can allow some physical phenomenons of student's visual understanding, deepening understanding, consolidating results of learning, in Ampère force teaching process, need the device using demonstration Ampère force
The acting force that Ampère force electrified wire is subject in magnetic field.Electric current is I, the long straight wire for L, and the Ampère force size be subject in uniform magnetic field B is: F=ILBsin (I, B), and wherein (I, B) is the angle between direction of current and magnetic direction.
At present, select the instruments used for education on market as teacher of physics, be difficult to find intuitively controlled ampere force presentation device.
In addition, for high two students, just contacted the magnetic field that nihility is dimly discernible, the time, student is very vast and hazy, just need the guiding of teacher this time, if use some teaching aids, abstract things is turned to and is familiar with intuitively, do the experiment that some are interesting, allow teacher is more intuitive, clearer to show to student, student just can be allowed to undergo the size of power and power.But this teaching material is for allowing student experience Ampère force, and to test the comparison adopted simple and crude, and operation is difficult to control, the error caused because of the instability of operation under equal experiment condition is very large.
Utility model content
The utility model has been provided as to solve selects the instruments used for education on market as teacher of physics at present, is difficult to find the deficiency of intuitively controlled ampere force presentation device, provides a kind of intuitively controlled ampere force presentation device.
The technical solution of the utility model is: a kind of intuitively controlled ampere force presentation device, comprise the wire be arranged in uniform magnetic field, the two ends of wire connect the two ends of power supply respectively, described uniform magnetic field is produced by the horse-shoe magnet be vertically arranged in the pressure pan scale scale pan, described wire is shown by the segment table extend in coil in horse-shoe magnet magnetic field, described coil can be rotatably set in a transfer gantry, described pressure disc weighing-appliance statistics have shown and shows the pressure added in its scale pan by screen.
The multiplex apparatus for demonstrating of this intuitively controlled Ampère force can by the display screen of pressure pan scale intuitively to the change of the pressure be applied on pan scale, so that student understands.
The utility model also has following optimal way: in described coil transverse central axis, arrange leader, described handle stretches out from the top of transfer gantry, the screw thread that utilization is arranged in handle axle and the threaded hole that transfer gantry top is reserved screw out, around threaded hole, feature radian.
In the connecting circuit of wire and battery, be also provided with a variable resistor R and amp gauge A.
Below contrast the drawings and specific embodiments and further instruction is more carried out to the utility model.
Accompanying drawing explanation
Accompanying drawing 1 is the utility model controlled ampere force presentation device structural representation directly perceived.
Accompanying drawing 2 is the coil schematic diagram of the utility model embodiment 1.
Accompanying drawing 3 is the transfer gantry schematical top view of the utility model embodiment 1.
Accompanying drawing 4 is circuit theory diagrams that the utility model embodiment 1 adopts.
In figure: 1, transfer gantry, 2, horse-shoe magnet, 3, coil, 4, pressure pan scale, 5, handle, 6, threaded hole.
Embodiment
Embodiment 1, as shown in Figure 1,2,3, 4, the present embodiment is a kind of apparatus for demonstrating that intuitively can reflect Ampère force, use the device of the present embodiment intuitively can reflect Ampère force formula F=ILBsin (I, B), when testing, I and I, B angle can change, can observe intuitively when L, B and I are constant, the relation that Ampère force F and sin (I, B) changes, now, the size of F only with sin (I, B) relevant, also can observe intuitively wire directly in B direction, magnetic field time, the relation of Ampère force F and electric current.
The circuit theory diagrams of the present embodiment as shown in Figure 4, battery BATT is connected with the wire in coil 3 by the variable resistor R of current limliting, coil has a few circle, electric current on wire in magnetic field is exactly several times of display on amp gauge A, by changing the resistance of variable resistor R, the size of current joined on wire can be changed, in the present embodiment, in the transverse central axis of coil 3, scheme is arranged on a handles 5, handle 5 and coil 3 are in same plane, and interlock, tourist utilizes the screw thread on handle 5 handle can be installed in transfer gantry 1 by coil 3, screw thread on handle is corresponding with transfer gantry 1 screw top hole 6, like this, coil moves up and down spacing in transfer gantry 1, but rotating is freely.Extend in magnetic field while can not move up and down due to coil, then by the relation of acting force and reacting force, when there being electric current to flow through in wire, horse-shoe magnet 2 illness is to pressing down, now, intuitively can see the change of pressure from the display of pressure pan scale 4, this pressure is that the weight of magnet adds Ampère force, in this process, the weight of horse-shoe magnet 2 itself is several inspires confidence in constant, and change is that pressure pan scale 4 show what change be the change of Ampère force.
Experiment can be completed in two steps when using the intuitively controlled ampere force presentation device of the present embodiment.
When testing, first adjusting the display of pressure pan scale 4, making, when horse-shoe magnet 2 is installed to seamless power pan scale 4, to make pressure pan scale 4 be shown as 0.
First student's direct vision can be allowed to be directly proportional to Ampère force to electric current, and now, by regulating the size of variable resistor R, can observe the situation of the display numeral of pressure pan scale 4, should be straight line through overwriting and analysis.
Secondly, when keeping electric current constant, pivotal handle 5, the situation of the display numeral of pressure pan scale 4 observed in record, should be a sinusoidal curve.
In addition, if the device of the present embodiment adopts generator to replace battery BATT as power supply, to coil power supply electricity, also can by Ampère force represent be generator no have generating, and from the display electronic scales, can find out the output power of generator, P=UI, electric current I is just in time be directly proportional to the pressure that electronic scales shows here.
Claims (3)
1. the multiplex apparatus for demonstrating of controlled Ampère force directly perceived, comprise the wire be arranged in uniform magnetic field, the two ends of wire connect the two ends of power supply respectively, it is characterized in that: described uniform magnetic field is produced by the horse-shoe magnet (2) be vertically arranged in pressure pan scale (4) scale pan, described wire is shown by the segment table extend in horse-shoe magnet (2) magnetic field in coil (3), described coil (3) can be rotatably set in a transfer gantry (1), described pressure pan scale (4) has digital display screen, show the pressure added in its scale pan.
2. the multiplex apparatus for demonstrating of intuitively controlled Ampère force according to claim 1, it is characterized in that: in described coil (3) transverse central axis, leader (5) is set, described handle (5) stretches out from the top of transfer gantry (1), the screw thread that utilization is arranged in handle axle and the threaded hole (6) that transfer gantry (1) top is reserved screw out, around threaded hole (6), feature radian.
3. the multiplex apparatus for demonstrating of intuitively controlled Ampère force according to claim 1, is characterized in that: in the connecting circuit of wire and battery, be also provided with a variable resistor R and amp gauge A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520707468.4U CN204990937U (en) | 2015-09-14 | 2015-09-14 | Multi -purpose presentation device of controllable ampere force directly perceived |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520707468.4U CN204990937U (en) | 2015-09-14 | 2015-09-14 | Multi -purpose presentation device of controllable ampere force directly perceived |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204990937U true CN204990937U (en) | 2016-01-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520707468.4U Expired - Fee Related CN204990937U (en) | 2015-09-14 | 2015-09-14 | Multi -purpose presentation device of controllable ampere force directly perceived |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204990937U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112102695A (en) * | 2020-10-23 | 2020-12-18 | 内江师范学院 | Ampere force experiment demonstration device |
-
2015
- 2015-09-14 CN CN201520707468.4U patent/CN204990937U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112102695A (en) * | 2020-10-23 | 2020-12-18 | 内江师范学院 | Ampere force experiment demonstration device |
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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: 20160914 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |