CN211264744U - Improved teaching aid for power failure self-induction demonstration - Google Patents
Improved teaching aid for power failure self-induction demonstration Download PDFInfo
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- CN211264744U CN211264744U CN201922443806.9U CN201922443806U CN211264744U CN 211264744 U CN211264744 U CN 211264744U CN 201922443806 U CN201922443806 U CN 201922443806U CN 211264744 U CN211264744 U CN 211264744U
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Abstract
The utility model discloses a power failure self-induction demonstration after improvement is with teaching aid, observe lamp, A2 contrast lamp, concave mirror, screen, reflected light beam and facula including power, double-pole switch, coil, A1, A1 is observed and is connected in parallel each other between lamp and the coil to with the common parallelly connected on the power two poles of A2 contrast lamp, double-pole switch simultaneous control A2 contrast lamp and A1 observe the lamp, realize the break-make of two lamps and power simultaneously, and ensure behind the outage A2 contrast lamp and coil disconnection, A1 observes the lamp and compares the lamp specification the same with A2, and the rated voltage that A1 observed the lamp and A2 compare the lamp is 6-8V. The utility model discloses a be provided with a series of structures and make this device increase the duration of self-induced electromotive force in the use, increased the experiment contrast, the definition, the visibility makes eyes feel comfortable, makes the phenomenon more clear visible, and the student of being convenient for observes, has protected student's eyesight simultaneously, optimizes the use.
Description
Technical Field
The utility model relates to a outage is from feeling demonstration technical field specifically is a teaching aid is used in outage from feeling demonstration after improvement.
Background
When a coil exists in a circuit, when current changes, the coil can generate self-induced electromotive force, in order to see the self-induced electromotive force, the coil and a bulb form a loop when the power is off, the size and the existence of the self-induced electromotive force are detected through the brightness and darkness of the bulb, however, after the power is off, the time for the lamp A to be extinguished in a delayed mode is short, after the power is off, the difference between the self-induced current in the lamp A and the original current in the lamp A before the power is off is too little, the lamp A cannot see the flashing, students cannot know what the lamp A is 'flashing and then extinguishing', because only one branch of the lamp A is not compared, the extinguishing phenomenon of the lamp after the power is off can not be judged to be 'directly extinguished' or 'flashing and then extinguishing', and because the matching reasons of all elements in the circuit, the power supply voltage cannot be too high, the brightness of the lamp is low, the visibility is small, and the phenomenon of 'flashing and then extinguishing' can be, the brightness of the filament is very dazzling, so that the eyes are easy to fatigue and the vision is damaged.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a outage after improvement is from sensing demonstration and is used teaching aid to solve the problem that provides in the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a teaching aid is used in demonstration of outage self-induction after improvement, includes power, double-pole switch, coil, A1 observation lamp, A2 contrast lamp, concave mirror, screen, reflected light beam and facula, A1 is observed and is parallelly connected each other between lamp and the coil to with A2 contrast lamp is parallelly connected on the power two poles jointly.
Through adopting above-mentioned technical scheme, increase the time that self-induced electromotive force lasts, increased contrast, definition, visibility, make eyes feel comfortable, make the phenomenon more clear visible, the student of being convenient for observes, has protected student's eyesight simultaneously, optimizes the use.
Preferably, the double-pole switch simultaneously controls the A2 comparison lamp and the A1 observation lamp, and simultaneously realizes the on-off of the two lamps and the power supply.
By adopting the technical scheme, the A2 contrast lamp is ensured to be disconnected from the coil after the power supply is disconnected.
Preferably, the A1 observation lamp and the A2 comparison lamp have the same specification, and the rated voltage of the A1 observation lamp and the A2 comparison lamp is 6-8V.
By adopting the technical scheme, the A1 observation lamp with the same specification and the A2 comparison lamp are selected to facilitate the students to observe the extinguishing phenomenon after power failure under the same condition.
Preferably, the A1 observation lamp and the A2 comparison lamp converge and reflect light beams to form light spots with uniform light intensity on a screen through concave mirrors.
By adopting the technical scheme, the A1 observation lamp and the A2 comparison lamp are placed at the focus of the concave mirror, the light is reflected by the concave mirror and converged into parallel light beams, the parallel light beams are projected on the screen, light spots with uniformly distributed light intensity can appear on the screen, and a student can draw a conclusion by comparing that the light spots of the two lamps on the screen are extinguished differently.
Preferably, the resistance value of the coil is 1-2 ohms, the diameter of a coil copper wire is 1.10mm, and the coil iron core is closed.
By adopting the technical scheme, when the current changes, the self-induced electromotive force generated by the coil is delayed.
Preferably, the power supply is a student power supply with direct current output of 4V or 6V.
By adopting the technical scheme, the visibility of the experiment is improved by adopting the direct-current power supply with the rated voltage of 4V or 6V.
Preferably, the output end of the power supply is electrically connected with the input ends of the A1 observation lamp, the A2 comparison lamp, the double-pole switch and the coil.
By adopting the technical scheme, the power supply provides current for the A1 observation lamp, the A2 comparison lamp, the double-pole switch and the coil.
To sum up, the utility model discloses following beneficial effect has:
in order to make students understand what is 'flash and then go out' and to add a 'contrast lamp' which is not affected by a coil to an 'observation lamp' and add a double-pole switch to simultaneously control the on-off power supply of the two lamps, in order to increase the definition of the phenomenon, an optical element concave mirror or a convex lens is adopted to convert the dazzling spot light of the original small bulb into surface light with light intensity uniformly distributed on a screen, so that the students can distinguish the tiny change of light, and the change of the distinguishing surface light is more beneficial to protecting the eyesight of the students than the change of the distinguishing spot light, on the basis of obviously enhancing the definition, the visibility of the experiment can be increased, a higher student power supply voltage of 4V-6V is adopted, a higher power lamp of 6-8V is adopted, aiming at the short 'flash' time, the self-inductance coefficient of the coil is increased by adopting a method of closing a coil iron core, so as to increase the duration time of the, the contrast, the definition and the visibility of the experiment are increased, the eyesight of the students is protected, and the phenomenon is more clear and visible.
Drawings
Fig. 1 is a circuit diagram of the present invention;
fig. 2 is a view of the comparison lamp a2 according to the present invention in combination with a screen.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element to which the reference is made must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected or detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1 to fig. 2, the present invention provides an embodiment: an improved teaching aid for power failure self-induction demonstration comprises a power supply, a double-pole switch, a coil, an A1 observation lamp, an A2 comparison lamp, a concave mirror, a screen, a reflected light beam and light spots, wherein the A1 observation lamp, the A2 comparison lamp and the coil are connected in parallel, the double-pole switch is closed, the power supply transmits current to the A1 observation lamp, the A2 comparison lamp and the coil respectively, when the current in the circuit is stable, the double-pole switch is disconnected to see that the light spots of the A2 comparison lamp are directly extinguished, the light spots of the A1 observation lamp are flashed and then extinguished, the A1 observation lamp and the A2 comparison lamp are placed at the focus of the concave mirror, the light is reflected by the concave mirror and converged into parallel light beams to be emitted to the screen, the light spots with uniformly distributed light intensity appear on the screen, and a student can conclude that the light spots of the two lamps on the screen are extinguished differently, thereby optimizing the use process.
Further, the double-pole switch simultaneously controls the A2 comparison lamp and the A1 observation lamp, simultaneously realizes the on-off of the two lamps and the power supply, and ensures that the A2 comparison lamp is disconnected from the coil after the power supply is disconnected.
Furthermore, the A1 observation lamp and the A2 comparison lamp have the same specification, the rated voltage of the A1 observation lamp and the A2 comparison lamp is 6-8V, and the A1 observation lamp and the A2 comparison lamp which have the same specification are selected to facilitate students to observe the comparative extinction phenomenon under the same condition after power failure.
Further, the A1 observation lamp and the A2 comparison lamp reflect light beams to the screen through the concave mirror to form light spots with uniformly distributed light intensity, the A1 observation lamp and the A2 comparison lamp are placed at the focus of the concave mirror, the light beams are reflected through the concave mirror to be converged into parallel light beams, the parallel light beams are emitted to the screen, the light spots with uniformly distributed light intensity can appear on the screen, and a student can draw a conclusion by comparing that the light spots of the two lamps on the screen are extinguished differently.
Further, the resistance value of the coil is 1-2 ohm, the diameter of the coil is 1.10mm, the iron core of the coil is closed, and when the current changes, the duration time of self-induced electromotive force generated by the coil is prolonged.
Furthermore, the power supply outputs 4V or 6V for student power supply direct current, and the visibility of the experiment is improved by adopting the 4V or 6V direct current power supply.
Furthermore, the output end of the power supply is electrically connected with the input ends of the A1 observation lamp, the A2 comparison lamp, the double-pole switch and the coil, and the power supply supplies current for the A1 observation lamp, the A2 comparison lamp, the double-pole switch and the coil.
It should be noted that the utility model relates to a power failure self-induction demonstration after improvement uses teaching aid, when in use, the double-pole switch is closed, the power supply transmits the current to the A1 observation lamp, the A2 comparison lamp and the coil respectively, when the current is stable in the circuit, the disconnection double-pole switch can see that the facula of the A2 comparison lamp is directly extinguished, the facula of the A1 observation lamp is extinguished after flashing, the A1 observation lamp and the A2 comparison lamp are placed at the focus of the concave mirror, the light is reflected by the concave mirror and converged into parallel beams, the parallel beams are projected on the screen, the facula with uniform light intensity distribution can appear on the screen, the students can draw conclusions when comparing the facula of the two lamps on the screen to extinguish, in order to make the students know what 'blinks are extinguished again' adopt 'the' observation lamp 'to add the' comparison lamp 'which is not affected by the coil', and the double-pole switch controls the power supply of the two lamps at the, in order to increase the definition of the phenomenon, an optical element concave mirror or a convex lens is adopted to convert the dazzling spot light of an original small bulb into surface light with light intensity uniformly distributed on a screen, so that students can distinguish small changes of light conveniently, and the change of the distinguishing surface light is more beneficial to protecting the eyesight of the students than the change of the distinguishing point light.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (7)
1. The utility model provides a power failure self-induction demonstration after improvement is with teaching aid, includes power, double-pole switch, coil, A1 observation lamp, A2 contrast lamp, concave mirror, screen, reflected light beam and facula, its characterized in that: the A1 observation lamp and the coil are connected in parallel with each other and are connected with the two poles of the power supply together with the A2 comparison lamp.
2. The improved teaching aid for self-induction demonstration of power failure according to claim 1, characterized in that: the double-pole switch simultaneously controls the A2 comparison lamp and the A1 observation lamp, and simultaneously realizes the on-off of the two lamps and the power supply.
3. The improved teaching aid for self-induction demonstration of power failure according to claim 1, characterized in that: the A1 observation lamp and the A2 comparison lamp have the same specification, and the rated voltage of the A1 observation lamp and the A2 comparison lamp is 6-8V.
4. The improved teaching aid for self-induction demonstration of power failure according to claim 1, characterized in that: the A1 observation lamp and the A2 comparison lamp converge and reflect light beams to form light spots with uniformly distributed light intensity on a screen through concave mirrors.
5. The improved teaching aid for self-induction demonstration of power failure according to claim 1, characterized in that: the resistance value of the coil is 1-2 ohms, the diameter of a coil copper wire is 1.10mm, and a coil iron core is closed.
6. The improved teaching aid for self-induction demonstration of power failure according to claim 1, characterized in that: the power supply is student power supply direct current output 4V or 6V.
7. The improved teaching aid for self-induction demonstration of power failure according to claim 1, characterized in that: the output end of the power supply is electrically connected with the input ends of the A1 observation lamp, the A2 contrast lamp, the double-pole switch and the coil.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2019205969147 | 2019-04-28 | ||
| CN201920596914 | 2019-04-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211264744U true CN211264744U (en) | 2020-08-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922443806.9U Active CN211264744U (en) | 2019-04-28 | 2019-12-30 | Improved teaching aid for power failure self-induction demonstration |
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|---|---|
| CN (1) | CN211264744U (en) |
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2019
- 2019-12-30 CN CN201922443806.9U patent/CN211264744U/en active Active
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