CN203433716U - Mutual-inductance device for experiment teaching - Google Patents
Mutual-inductance device for experiment teaching Download PDFInfo
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- CN203433716U CN203433716U CN201320461999.0U CN201320461999U CN203433716U CN 203433716 U CN203433716 U CN 203433716U CN 201320461999 U CN201320461999 U CN 201320461999U CN 203433716 U CN203433716 U CN 203433716U
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- cavity skeleton
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- 238000002474 experimental method Methods 0.000 title abstract description 8
- 238000004804 winding Methods 0.000 claims abstract description 47
- 230000006698 induction Effects 0.000 abstract description 4
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 abstract 4
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 230000033228 biological regulation Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920001342 Bakelite® Polymers 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004637 bakelite Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Abstract
The utility model relates to a mutual-inductance device for experiment teaching, and belongs to the technical field of experiment teaching instruments. The device comprises a pedestal, a cavity framework I, a cavity framework II, a winding coil I, a winding coil II, a fixed support I, a fixed support II, and a fixed support III. The cavity frameworks are horizontally supported and fixed on the pedestal through the fixed support I and the fixed support II. The winding coil I and the winding coil II respectively wrap the external surface of the cavity framework I and the external surface of the cavity framework II in a uniform close-winding manner. End lines of the two winding coils are respectively connected with a binding post on the pedestal. The device also comprises a connecting support, a scale, a scale adjusting screw rod, and a sleeve which is connected with the adjusting screw rod and the scale. The scale and the cavity framework II are connected and fixed through the connecting support. The sleeve is fixed on the pedestal through a fixed support III. The device provided by the utility model not only can measure the coefficient of mutual induction, but also can observe the changes, caused by the changes of relative positions of the two coils, of the size of a signal, i.e., the changes of the size of the coefficient of mutual induction.
Description
Technical field
The utility model relates to a kind of experimental teaching mutual-inductance apparatus, is mainly used in the college physical experiment teaching of institution of higher learning's science and engineering specialty, belongs to experiment teaching instrument technical field.
Background technology
When the electric current in a coil changes, near another coil it, will produce induction electromotive force, vice versa, and this is called mutual inductance phenomenon.Mutual inductor is comprised of former and deputy coil, passes into exchange current in primary winding, and flux change can produce induction electromotive force in secondary coil, and the transformer that utilizes mutual inductance principle to make is widely used in scientific research.Obviously, the Mutual Inductance Coupling degree of two coils is not only relevant with the curent change speed in coil, also relevant with the structure of mutual inductor itself.An important parameter of mutual inductor is coefficient of mutual inductance, by the relative position between the geometric configuration of coil, size, the number of turn, coil, the character of whether filling magnetic medium and magnetic medium, determined, and with coil in electric current irrelevant.The calculating more complicated of coefficient of mutual inductance, in reality, the normal method of experiment that adopts is measured.At present, some is simple in Experiment of College Physics, to study mutual inductor structure that mutual inductance phenomenon uses, the relative position of two coils is fixed, the impact of the variation that experiment measuring process middle school student cannot experience coil position on mutual inductance phenomenon and coefficient of mutual inductance, makes them for coil mutual inductance coupling degree, also only only limit to theoretic understanding.
Summary of the invention
The technical problems to be solved in the utility model is to provide the mutual-inductance apparatus that a kind of experimental teaching is used, use this device research mutual inductance phenomenon can not only measure coefficient of mutual inductance, and can make student experience fully the impact of the change of coil position on coefficient of mutual inductance, strengthen student's practice knowledge and the understanding to knowwhy.
The technical solution of the utility model is: a kind of experimental teaching mutual-inductance apparatus, comprises base 1, cavity skeleton I 21, cavity skeleton II 22, winding coil I 31, winding coil II 32, fixed support I 41, fixed support II 42, fixed support III 43; Cavity skeleton 21 is fixed on base 1 by fixed support I 41 and fixed support II 42 horizontal supports, and winding coil I 31, winding coil II 32 are evenly close to be respectively connected with the binding post on base 1 respectively around cavity skeleton I 21, the outside surface of cavity skeleton II 22, the end line of two winding coils.Also comprise connection bracket 5, scale 6, scale adjusting screw(rod) 7 and the sleeve 8 that connects adjusting screw(rod) 7 and scale 6; Scale 6 and cavity skeleton II 22 are connected and fixed by connection bracket 5, and sleeve 8 is supported and fixed on base 1 by fixed support III 43.
The transversal section of described cavity skeleton I 21 and cavity skeleton II 22 is circular.
The horizontal center line of described cavity skeleton I 21 and cavity skeleton II 22 overlaps.
The diameter of described cavity skeleton I 21 is greater than the diameter of cavity skeleton II 22.
Regulation scale adjusting screw(rod) 7, can allow cavity skeleton II 22 enter cavity skeleton I 21 inside, can see the signal waveform of strengthening in Mutual Inductance Coupling degree situation, calculates larger coefficient of mutual inductance.
Wherein, regulate the mobile scale 6 that described scale adjusting screw(rod) 7 can level, by the mobile cavity skeleton II 22 of connection bracket 5 levels, thereby change winding coil II 32 positions with respect to winding coil I 31.Two cavity skeletons can adopt pvc pipe or electric bakelite to make, the common thin copper wire for two winding coils that its outside surface covers.This device can be made visual, and a transparent cover matching with base can be covered in outside, or directly just adopts openly, is convenient to observation of students.
When using this mutual-inductance apparatus research mutual inductance phenomenon and measuring coefficient of mutual inductance, by alternating signal and a resistance
after series connection, be connected with two binding posts of winding coil I 31, two binding posts and a pull-up resistor of winding coil II 32
be connected, with a passage observation resistance of dual trace oscilloscope
on signal, with its another one passage observation resistance
on signal, read the Voltage Peak peak value of oscilloscope display
with
, according to formula
calculate to obtain the coefficient of mutual inductance f frequency that is signal.Regulation scale adjusting screw(rod) 7, the mobile scale 6 of level, by the mobile cavity skeleton II 22 of connection bracket 5 levels, change winding coil II 32 positions with respect to winding coil I 31, can observe the shown mutual inductance signal size of two passages of oscillograph and change along with moving of scale.By the reading on scale, utilize above-mentioned coefficient of mutual inductance computing formula, can calculate winding coil II 32 at each corresponding coefficient of mutual inductance in position.
The beneficial effects of the utility model are: two coil positions in mutual inductor no longer immobilize, use this device research mutual inductance phenomenon can not only measure coefficient of mutual inductance, and the student's big or small variation that can observe the signal that the change due to two coil relative positions brings causes the variation of coefficient of mutual inductance size, make their impact of the vivid relative position of experiencing coil on Mutual Inductance Coupling degree, strengthen student's practice knowledge and the understanding to knowwhy.Meanwhile, this device adopts visuality to design and unconventional " black box " design, can deepen the understanding to mutual inductance original paper structure.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the circuit diagram of the utility model research mutual inductance phenomenon;
In figure: 1-base, 21-cavity skeleton I, 22-cavity skeleton II, 31-winding coil I, 32-winding coil II, 41-fixed support I, 42-fixed support II, 43-fixed support III, 5-connection bracket, 6-scale, 7-scale adjusting screw(rod), 8-sleeve.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Embodiment 1: as shown in Figure 1-2, a kind of experimental teaching mutual-inductance apparatus, comprises base 1, cavity skeleton I 21, cavity skeleton II 22, winding coil I 31, winding coil II 32, fixed support I 41, fixed support II 42, fixed support III 43; Cavity skeleton 21 is fixed on base 1 by fixed support I 41 and fixed support II 42 horizontal supports, and winding coil I 31, winding coil II 32 are evenly close to be respectively connected with the binding post on base 1 respectively around cavity skeleton I 21, the outside surface of cavity skeleton II 22, the end line of two winding coils.Also comprise connection bracket 5, scale 6, scale adjusting screw(rod) 7 and the sleeve 8 that connects adjusting screw(rod) 7 and scale 6; Scale 6 and cavity skeleton II 22 are connected and fixed by connection bracket 5, and sleeve 8 is supported and fixed on base 1 by fixed support III 43.The transversal section of cavity skeleton I 21 and cavity skeleton II 22 is circular.The horizontal center line of cavity skeleton I 21 and cavity skeleton II 22 overlaps.The diameter of cavity skeleton I 21 is greater than the diameter of cavity skeleton II 22.
Embodiment 2: as shown in Figure 1-2, a kind of experimental teaching mutual-inductance apparatus, comprises base 1, cavity skeleton I 21, cavity skeleton II 22, winding coil I 31, winding coil II 32, fixed support I 41, fixed support II 42, fixed support III 43; Cavity skeleton 21 is fixed on base 1 by fixed support I 41 and fixed support II 42 horizontal supports, and winding coil I 31, winding coil II 32 are evenly close to be respectively connected with the binding post on base 1 respectively around cavity skeleton I 21, the outside surface of cavity skeleton II 22, the end line of two winding coils.Also comprise connection bracket 5, scale 6, scale adjusting screw(rod) 7 and the sleeve 8 that connects adjusting screw(rod) 7 and scale 6; Scale 6 and cavity skeleton II 22 are connected and fixed by connection bracket 5, and sleeve 8 is supported and fixed on base 1 by fixed support III 43.The transversal section of cavity skeleton I 21 and cavity skeleton II 22 is circular.The horizontal center line of cavity skeleton I 21 and cavity skeleton II 22 overlaps.
Embodiment 3: as shown in Figure 1-2, a kind of experimental teaching mutual-inductance apparatus, comprises base 1, cavity skeleton I 21, cavity skeleton II 22, winding coil I 31, winding coil II 32, fixed support I 41, fixed support II 42, fixed support III 43; Cavity skeleton 21 is fixed on base 1 by fixed support I 41 and fixed support II 42 horizontal supports, and winding coil I 31, winding coil II 32 are evenly close to be respectively connected with the binding post on base 1 respectively around cavity skeleton I 21, the outside surface of cavity skeleton II 22, the end line of two winding coils.Also comprise connection bracket 5, scale 6, scale adjusting screw(rod) 7 and the sleeve 8 that connects adjusting screw(rod) 7 and scale 6; Scale 6 and cavity skeleton II 22 are connected and fixed by connection bracket 5, and sleeve 8 is supported and fixed on base 1 by fixed support III 43.The transversal section of cavity skeleton I 21 and cavity skeleton II 22 is circular.
Embodiment 4: as shown in Figure 1-2, a kind of experimental teaching mutual-inductance apparatus, comprises base 1, cavity skeleton I 21, cavity skeleton II 22, winding coil I 31, winding coil II 32, fixed support I 41, fixed support II 42, fixed support III 43; Cavity skeleton 21 is fixed on base 1 by fixed support I 41 and fixed support II 42 horizontal supports, and winding coil I 31, winding coil II 32 are evenly close to be respectively connected with the binding post on base 1 respectively around cavity skeleton I 21, the outside surface of cavity skeleton II 22, the end line of two winding coils.Also comprise connection bracket 5, scale 6, scale adjusting screw(rod) 7 and the sleeve 8 that connects adjusting screw(rod) 7 and scale 6; Scale 6 and cavity skeleton II 22 are connected and fixed by connection bracket 5, and sleeve 8 is supported and fixed on base 1 by fixed support III 43.
By reference to the accompanying drawings embodiment of the present utility model is explained in detail above, but the utility model is not limited to above-mentioned embodiment, in the ken possessing those of ordinary skills, can also under the prerequisite that does not depart from aim of the present invention, make various variations.
Claims (4)
1. an experimental teaching mutual-inductance apparatus, comprises base (1), cavity skeleton I (21), cavity skeleton II (22), winding coil I (31), winding coil II (32), fixed support I (41), fixed support II (42), fixed support III (43); Cavity skeleton (21) is fixed on base (1) by fixed support I (41) and fixed support II (42) horizontal support, and winding coil I (31), winding coil II (32) are evenly close to be respectively connected with the binding post on base (1) respectively around cavity skeleton I (21), the outside surface of cavity skeleton II (22), the end line of two winding coils; It is characterized in that: also comprise connection bracket (5), scale (6), scale adjusting screw(rod) (7) and the sleeve (8) that connects adjusting screw(rod) (7) and scale (6); Scale (6) and cavity skeleton II (22) are connected and fixed by connection bracket (5), and sleeve (8) is supported and fixed on base (1) by fixed support III (43).
2. experimental teaching mutual-inductance apparatus according to claim 1, is characterized in that: the transversal section of described cavity skeleton I (21) and cavity skeleton II (22) is for circular.
3. experimental teaching mutual-inductance apparatus according to claim 2, is characterized in that: the horizontal center line of described cavity skeleton I (21) and cavity skeleton II (22) overlaps.
4. according to the experimental teaching mutual-inductance apparatus described in claim 2 or 3, it is characterized in that: the diameter of described cavity skeleton I (21) is greater than the diameter of cavity skeleton II (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320461999.0U CN203433716U (en) | 2013-07-31 | 2013-07-31 | Mutual-inductance device for experiment teaching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320461999.0U CN203433716U (en) | 2013-07-31 | 2013-07-31 | Mutual-inductance device for experiment teaching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203433716U true CN203433716U (en) | 2014-02-12 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320461999.0U Expired - Fee Related CN203433716U (en) | 2013-07-31 | 2013-07-31 | Mutual-inductance device for experiment teaching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203433716U (en) |
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2013
- 2013-07-31 CN CN201320461999.0U patent/CN203433716U/en not_active Expired - Fee Related
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| 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: 20140212 Termination date: 20140731 |
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| EXPY | Termination of patent right or utility model |