CN200969171Y - Ampere force visual experiment instrument - Google Patents
Ampere force visual experiment instrument Download PDFInfo
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- CN200969171Y CN200969171Y CN 200620159243 CN200620159243U CN200969171Y CN 200969171 Y CN200969171 Y CN 200969171Y CN 200620159243 CN200620159243 CN 200620159243 CN 200620159243 U CN200620159243 U CN 200620159243U CN 200969171 Y CN200969171 Y CN 200969171Y
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- coil
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- electromagnet
- protractor
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Abstract
An intuitionistic experiment apparatus of Ampere force relates to an experimental device for physics teaching, in particular to an intuitionistic experiment apparatus of Ampere force. The utility model provides an intuitionistic experiment apparatus of Ampere force which is intuitionistic, convenient and can product quantitative demonstration and measurement of Ampere force. The utility model comprises a bracket, a spring balance, a winding and winding framework, a piece of electromagnet, an excitation power, a winding angle locator card and winding power, wherein, the spring balance is provided with a spring, a ruler and a hand, the upper end of the spring balance is arranged in the bracket and the hand is positioned on the lower end of the spring which is connected with the winding bracket; the winding angle locator card is provided with a circular protractor and a set rule, and the circular protractor is provided with a pair of grooves which is inlaid with the both ends of the winding bracket, and the set rule is arranged on the surface of the protractor; the two ends of the set rule are respectively positioned on the piece of the electromagnet which is connected with the excitation power; the winding goes around the winding bracket and the winding is connected with the winding power.
Description
Technical field
The utility model relates to a kind of physics teaching experiment equipment, especially relates to a kind of Amp visual experiment instrument.
Background technology
Amp is widely used in daily production and life.But owing to there is not directly perceived, easy quantitative instrument to probe into the Amp formula all sidedly, the student can only rely on to memorize mechanically and learn and use in existing textbook.Not having at present can be complete, intuitively, the instrument and equipment of quantitative measurment Amp rule easily, can only measure or the following two kinds of situations of qualitative checking: 1) as B, L, when θ is constant, F ∝ I
L2) as B, I
L, when θ is constant, F ∝ L, wherein B is a magnetic induction density, L is a conductor length, θ is the angle of lead and magnetic direction, F is an Amp, I is a strength of current.And complicated operation, poor effect.
Summary of the invention
The purpose of this utility model is at there not being directly perceived, easy quantitative instrument to probe into the equipment of Amp formula all sidedly in the existing physics teaching experiment equipment, and a kind of Amp visual experiment instrument of can be directly perceived, easy, quantitatively demonstrating and measuring Amp is provided.
The utility model is provided with support, spring balance, coil and coil rack, electromagnet and field power supply, coil angle locator card and coil power, spring balance is provided with spring, rule and pointer, the upper end of spring balance is fixed on the support, pointer is located at the spring lower end, the spring lower end is connected with coil rack, the coil angle locator card is provided with circular protractor and positioning rule, on circular protractor, be provided with a pair of groove, the coil rack both sides embed in the groove on the circular protractor, positioning rule is located at the protractor upper surface, and the positioning rule two ends are separately fixed on the electromagnet, and electromagnet is electrically connected with field power supply, coil is on coil rack, and coil power is connected with coil.
The spring of spring balance can adopt electric furnace heating wire.Circular protractor can be made up of 2 semicircular protractor butt joints.Coil rack is square frame shape, and coil adopts multiturn coil.
Compare with existing relevant Amp physics teaching experiment equipment, therefore the utility model can realize directly perceived accurate measurement of Amp owing to be provided with the high sensitivity spring balance of band rule, pointer, breaks through quantitatively probing into of Amp.Because set coil angle locator card has the angle theta of accurate pilot direction and magnetic direction, therefore break through quantitatively probing into of F ∝ Sin θ.Owing to adopt multiturn coil to realize the change of electrified wire length L variable, therefore realize quantitatively probing into of F ∝ L.Owing to select even strength of electromagnetic field to realize the change of magnetic induction density B variable, therefore realize quantitatively probing into of F ∝ B.
If the utility model and digital experiment system (for example force transducer, current sensor technology etc.) are integrated, the rule that then makes the utility model probe into Amp reaches the digitized means of scientific experiment.Because the degree of accuracy of the utility model measurement Amp and highly sensitive is so can design a kind of degree of accuracy higher " sensor of power " and the supporting use of the utility model.
The utility model is visual and understandable, quantitatively accurate, simple to operate, embodies the subject characteristics based on experiment, and the change present situation that teacher inculcates, the classmate memorize mechanicallys has solved compilation of teaching materials and do not had the deficiency of necessary instrument.
The utility model not only provides quantitatively or the instrument of sxemiquantitative ocular demonstration Amp for teacher's classroom instruction, and provides experimental apparatus for middle school student probe into the Amp formula, provides the instrument of surveying Amp for college common physics experiment simultaneously.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment.
Fig. 2 is Amp F and coil current I
LGraph of relation.In Fig. 2, horizontal ordinate is coil current I
L(A), ordinate is Amp F (a mm unit force).
Fig. 3 is Amp F and exciting current I
BGraph of relation.In Fig. 3, horizontal ordinate is exciting current I
B(A), ordinate is Amp F (a mm unit force).
Fig. 4 is the graph of relation of Amp F and Sin θ.In Fig. 4, horizontal ordinate is Sin θ, and ordinate is Amp F (a mm unit force).
Embodiment
As shown in Figure 1, the utility model is provided with support 1, spring balance 2, multiturn coil 3 and coil rack 4, electromagnet 5 and field power supply (not drawing), coil angle locator card and coil power (not drawing) in Fig. 1 in Fig. 1.Spring balance 2 comprises spring 21, rule 22 and pointer 23, and spring 21 upper ends are fixed on the support 1, and pointer 23 is located at spring 21 lower ends, and spring 21 lower ends are connected with coil rack 4.The coil angle locator card is provided with circular protractor 6 and positioning rule 7, is provided with a pair of groove 61 on circular protractor 6, and coil rack 4 both sides embed in the groove 61 on the circular protractor 6, is fixed on the support 1 then and can freely rotates.Positioning rule 7 is located at circular protractor 6 upper surfaces, and positioning rule 7 two ends are separately fixed on the electromagnet 5.Electromagnet 5 is electrically connected with field power supply, and multiturn coil 3 is on coil rack 4, and coil power is electrically connected with multiturn coil 3.
The spring 21 of spring balance 2 is composed in series by 4 " 220V300W " electric furnace heating wires, and the registration of spring balance is the mm unit force.Circular protractor 6 is made up of 2 semicircular protractor butt joints.Coil rack 4 is square frame shape.Coil can only move up and down when the coil angle locator card not only can guarantee to test, and prevented coil torsion, and the angle theta that can accurately control electromotion straight wire L and magnetic direction B simultaneously changes between 0 °-180 °.Coil adopts 88mm * 188mm four tap multiturn coils 3, and its direct current resistance is 13.5 * 4 Ω, and coil is totally 200 circles, is 50 circles between per two adjacent taps, and total quality is 69.2g.Thereby be convenient to change the relation that the number of turn is studied straight conductor length L and Amp F.Electromagnet 5 can adopt the electromagnet of J2431 electromagnetic induction demonstration device.
Power supply can adopt following technical indicator: input voltage: exchange 180-240V, output current: two groups of direct current 0--5A, output voltage: two groups of direct current 0--30V, output power: 300W.Power supply can adopt the big screen LED numeral to show that visibility is big, and visual sense is effective.The Switching Power Supply principle is all used in power supply DC-DC conversion and adjustable voltage stabilizing output, and frequency is at 50KHZ-100KHZ.The AC-DC conversion efficiency is more than 85%, and adjustable voltage stabilizing output efficiency reaches 89%-91%, and overall efficiency is more than 75%.
Below provide using method of the present utility model.Adopt control change of variable method to realize F=BI
LThe visual rationing of LSin θ is measured.1) works as B//I
LThe time, F
Min=0 minimum; 2) as B ⊥ I
LThe time, F
Max=BI
LThe L maximum; 3) as B, L, when θ is constant, F ∝ I.Work as I
L, L, when θ is constant, F ∝ B; As B, I
L, when θ is constant, F ∝ L; As B, I
L, when L is constant, F ∝ Sin θ.
In order to simplify apparatus,, be equivalent to 2 low-tension supplies and 2 reometers being fitted together for the field power supply of electromagnet power supply and two power pack of coil power of powering for coil L.Two digital electric meters are measured coil current and exciting current simultaneously respectively, and employing giant-screen digital electronic ammeter is measured accurately, visibility is big, and visual sense is effective.Great advantage is to realize that voltage, electric current transfers from zero, and adopts multiturn potentiometer to be matched by coarse adjustment and fine setting, and is easy to adjust and change even.
1. visual rationing experiment
With the coil base is research object, and spring balance increase or the registration that reduces are the size of the suffered Amp F in coil base.
Experiment one: when the lead direction was parallel with magnetic direction, Amp was zero.
1) the rotational positioning card makes coil plane follow the parallel θ of magnetic direction=0 °.2) line taking circle N=200T, exciting current I
B=1.26A, coil current I
L=0.50A.Energising back coil does not move up and down, and shows that the coil base is not subjected to Amp.3) between 0-1.5A, change I
B, between 0-0.50A, change I
L, coil does not all move up and down all the time, shows Amp F ≡ 0.
Experiment two: when the lead direction is vertical with magnetic direction, the Amp maximum.
1) gets N=200T, I
B=1.26A, I
L=0.50A.2) the rotational positioning card increases coil base and magnetic direction angle theta, and then Amp F increases thereupon, and during θ=90 °, F has maximal value F
Max=50mm unit force.
Experiment three: perpendicular to the electrified wire of magnetic direction, F that is subjected to and I
LSize be directly proportional (referring to table 1 and Fig. 2).
Table 1
| I L(A) | 0 | 0.10 | 0.20 | 0.30 | 0.40 | 0.50 |
| F (mm unit force) | 0 | 9.9 | 19.9 | 30.0 | 40.0 | 50.0 |
| ΔI l(A) | 0.10 | |||||
| Δ F (mm unit force) | 9.9 | 10.0 | 10.1 | 10.0 | 10.0 | |
N＝200T，L＝200×88mm，I
B＝1.26A，θ＝90°。
Experiment four: perpendicular to the electrified wire of magnetic direction, the Amp F that is subjected to be directly proportional with conductor length L (referring to table 2).
Table 2
| I L(A) | 0 | 0.10 | 0.20 | 0.30 | 0.40 | 0.50 |
| F (mm unit force) | 0 | 5.0 | 9.9 | 14.9 | 19.9 | 24.9 |
| ΔI l(A) | 0.10 | |||||
| Δ F (mm unit force) | 5.0 | 4.9 | 5.0 | 5.0 | 5.0 | |
N＝100T，L＝100×88mm，I
B＝1.26A，θ＝90°。
Comprehensive above-mentioned two tables are to such as table 3.
Table 3
| I L(A) | 0.10 | 0.20 | 0.30 | 0.40 | 0.50 | Slope b |
| F (mm unit force) (L=200 * 88mm) | 9.9 | 19.9 | 30.0 | 40.0 | 50.0 | 100.11 |
| F (mm unit force) (L=100 * 88mm) | 5.0 | 9.9 | 14.9 | 19.9 | 24.9 | 49.77 |
I
B＝1.26A，θ＝90°。Conclusion: under the square one, L reduces half, and the Amp that lead is subjected to also reduces half.
Experiment five: perpendicular to the electrified wire in magnetic field, the Amp F that is subjected to is directly proportional with magnetic induction density B.
Because B and I
BBe directly proportional, so the quantitative demonstration of F and B just is converted into F and I
BQuantitative demonstration (see Table 4 and Fig. 3).
Table 4
| I B(A) | 0 | 0.30 | 0.60 | 0.90 | 1.20 | 1.50 | 1.80 |
| F (mm unit force) | 0 | 10.0 | 20.0 | 30.0 | 40.0 | 49.9 | 59.7 |
| ΔI B(A) | 0.30 | ||||||
| Δ F (mm unit force) | 10.0 | 10.0 | 10.0 | 10.0 | 9.9 | 9.8 | |
N＝200T，L＝200×88mm，I
L＝0.42A，θ＝90°。
Experiment six: at B, I
L, under the constant situation of L size, Amp F be directly proportional with Sin θ (referring to table 5 and Fig. 4).
Table 5
| θ(°) | 90 | 75 | 60 | 45 | 30 | 15 | 0 |
| Sinθ | 1.0 | 0.9659 | 0.866 | 0.7071 | 0.5 | 0.2588 | 0 |
| F experiment value (mm unit force) | 60.0 | 57.0 | 51.8 | 41.5 | 29.1 | 16.2 | 0 |
| F theoretical value (mm unit force) | 60.0 | 57.95 | 53.16 | 42.43 | 30.0 | 15.53 | 0 |
| Percentage error (%) | 1.67 | 2.63 | 2.24 | 3.09 | 4.31 |
N＝200T，L＝200×88mm，I
B＝1.52A，I
L＝0.50A。
The problem that should note for the utility model is:
1, about stressed coil: 1. coil width is big as far as possible, but is less than the width 107mm of magnetic pole, so that F=0 when doing " parallel "; 2. coil height can not be too low, because when the coboundary in straight flange and magnetic field distance is less than 80mm on the coil, magnetic field can not be ignored the influence of its Amp; 3. the stressed position on coil base should be in the scope of 100mm in the middle of the magnetic field; 4. the energising of coil lead-in wire wants thin, laterally introduce, and unsettled! To reduce the influence of tension force that go between to experiment; 5. the hot-wire coil sense of current should make the suffered ampere force direction of coil straight down, and during like this in θ=90 °, coil is in the stable equilibrium and can reverse; 6. coil will guarantee rectangle, otherwise the result can be not linear.
2, about reading: 1. for ease of reading, want first calibrated scale before the experiment, timing F value greatly some and be that integer is more directly perceived; 2. in the F-Sin θ experiment, adjust θ ≠ 90 ° respectively organize angle value the time because reversing of coil makes the locator card angle mark inaccurate to the location of coil, therefore must be according to the corresponding gap value of gap adjustment of locator card and coil.Before reading the F data, must vertically knock locator card coil on every side lightly with the straight rod that is not magnetized, to reduce the friction force between locator card and coil; 3. after changing the θ angle, pointer also will turn to rule thereupon, so that reading at every turn.
Claims (5)
1. Amp visual experiment instrument, it is characterized in that being provided with support, spring balance, coil and coil rack, electromagnet and field power supply, coil angle locator card and coil power, spring balance is provided with spring, rule and pointer, the upper end of spring balance is fixed on the support, pointer is located at the spring lower end, the spring lower end is connected with coil rack, the coil angle locator card is provided with circular protractor and positioning rule, on circular protractor, be provided with a pair of groove, the coil rack both sides embed in the groove on the circular protractor, positioning rule is located at the protractor upper surface, the positioning rule two ends are separately fixed on the electromagnet, electromagnet is electrically connected with field power supply, and coil is on coil rack, and coil power is connected with coil.
2. Amp visual experiment instrument as claimed in claim 1 is characterized in that the spring of spring balance adopts electric furnace heating wire.
3. Amp visual experiment instrument as claimed in claim 1 is characterized in that circular protractor is made up of the butt joint of 2 semicircular protractors.
4. Amp visual experiment instrument as claimed in claim 1 is characterized in that coil rack is square frame shape.
5. Amp visual experiment instrument as claimed in claim 1 is characterized in that coil adopts multiturn coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620159243 CN200969171Y (en) | 2006-11-17 | 2006-11-17 | Ampere force visual experiment instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620159243 CN200969171Y (en) | 2006-11-17 | 2006-11-17 | Ampere force visual experiment instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200969171Y true CN200969171Y (en) | 2007-10-31 |
Family
ID=38968745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620159243 Expired - Fee Related CN200969171Y (en) | 2006-11-17 | 2006-11-17 | Ampere force visual experiment instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200969171Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106875795A (en) * | 2017-04-19 | 2017-06-20 | 王仁泉 | A kind of instructional device for semiquantitative determination Ampere force influence factor |
| CN107403574A (en) * | 2017-08-28 | 2017-11-28 | 齐齐哈尔大学 | A kind of device of Ampere force and static-electronic driving |
| CN109949670A (en) * | 2019-04-20 | 2019-06-28 | 安徽师范大学 | One kind quantitatively probing into Ampere force size demonstrator |
-
2006
- 2006-11-17 CN CN 200620159243 patent/CN200969171Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106875795A (en) * | 2017-04-19 | 2017-06-20 | 王仁泉 | A kind of instructional device for semiquantitative determination Ampere force influence factor |
| CN107403574A (en) * | 2017-08-28 | 2017-11-28 | 齐齐哈尔大学 | A kind of device of Ampere force and static-electronic driving |
| CN107403574B (en) * | 2017-08-28 | 2019-08-23 | 齐齐哈尔大学 | A kind of device of Ampere force and static-electronic driving |
| CN109949670A (en) * | 2019-04-20 | 2019-06-28 | 安徽师范大学 | One kind quantitatively probing into Ampere force size demonstrator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071031 Termination date: 20131117 |