CN204440775U

CN204440775U - Sxemiquantitative Ampère force exploring instrument

Info

Publication number: CN204440775U
Application number: CN201520087438.8U
Authority: CN
Inventors: 刘苹芳
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-02-09
Filing date: 2015-02-09
Publication date: 2015-07-01
Anticipated expiration: 2025-02-09

Abstract

The utility model sxemiquantitative Ampère force exploring instrument, comprises base, base comprises that one is long and the other is short two vertical supports, and support is equipped with two axle sleeves, the end of long stent is also fixed with a horizontal circle, index dial is painted with horizontal evenly divided line; Battery case, digital electronic ammeter, potentiometer and switch are equipped with in described horizontal base inside, and above-mentioned four are cascaded, and are finally connected to positive and negative electrode binding post; Described horizontal base is provided with U-shaped magnet case, box is painted with magnetic field markings, U-shaped magnet case can move forward and backward; Described horizontal base is provided with coil lead, square coil and pointer, coil to be fixed on a transverse axis and to be arranged on axle sleeve, transverse axis contacts with axle sleeve good and can freely rotate, the wire of coil is drawn by axle sleeve and is connected with the coil lead be arranged on base, pointer is fixed on a vertical edge of coil, rotates and rotate with wire frame.Further, coil is connected with power utilization wire, and U magnet is placed in U-shaped magnet case, can put three pieces side by side at most.

Description

Sxemiquantitative Ampère force exploring instrument

Technical field

The utility model relates to teaching aid field, is applied particularly to assisted learning and the cognitive factor affecting Ampère force, and verifies left-hand rule.

Background technology

The power that electrified wire is subject in magnetic field is called Ampère force, is an important knowledge point of middle school period, and it is closely bound up with life, learns this part content well and is conducive to the principle of work that student understands motor, reometer.

In standard configuration in laboratory of middle school, be placed in U magnet with the rope lead frame that plays, judge the size of Ampère force by the inclined degree of rope under Ampère force effect, seem too simple and crude, can only judge qualitatively.And although the DIS sensor on market can realize the accurate quantitative measurment to Ampère force, expensive, be unfavorable for penetration and promotion.Meanwhile, complicated sensor and the human-subject test of middle school student have distance, student only can with and do not understand, teaching efficiency may not be certain have superiority than traditional instrument.

Summary of the invention

Technical problem to be solved in the utility model is for above-mentioned deficiency of the prior art, provide a kind of can assisted learning and the cognitive factor affecting Ampère force, and verify the exploring instrument of left-hand rule, the structure of this exploring instrument is simple, easy understand, is easy to realize.

The utility model solves the technical scheme that its technical matters adopts: sxemiquantitative Ampère force exploring instrument, comprise base, base comprises that one is long and the other is short two vertical supports, two axle sleeves support are equipped with, the end of long stent is also fixed with a horizontal circle, index dial is painted with horizontal evenly divided line;

Battery case, digital electronic ammeter, potentiometer and switch are equipped with in above-mentioned horizontal base inside, and above-mentioned four are cascaded, and are finally connected to positive and negative electrode binding post;

Above-mentioned horizontal base is provided with U-shaped magnet case, box is painted with magnetic field markings, U-shaped magnet case can move forward and backward;

Above-mentioned horizontal base is provided with coil lead, square coil and pointer, coil to be fixed on a transverse axis and to be arranged on axle sleeve, transverse axis contacts with axle sleeve good and can freely rotate, the wire of coil is drawn by axle sleeve and is connected with the coil lead be arranged on base, pointer is fixed on a vertical edge of coil, rotates and rotate with wire frame.

Further, coil is connected with power utilization wire, and U magnet is placed in U-shaped magnet case, can put three pieces side by side at most.

The utility model compared with prior art has the following advantages:

The utility model sxemiquantitative Ampère force exploring instrument, adopt principle of moment balance, the sxemiquantitative achieved affecting each factor of Ampère force size by simple structure is probed into, and can verify left-hand rule simultaneously.Facts have proved this instrument have cheap, operation is simple and reliable, reading accuracy comparatively advantages of higher, has certain Practical significance to the teaching of Ampère force.

Accompanying drawing explanation

Fig. 1 is structure front elevation of the present utility model;

Fig. 2 is structure side view of the present utility model;

Fig. 3 is circuit diagram of the present utility model;

Description of reference numerals:

1-index dial, 2-pointer, 3-support, 4-axle sleeve, 5-U-shaped magnet case, 6-coil, 7-coil lead, 8-base, 9-digital electronic ammeter, 10-potentiometer, 11-magnetic field markings, 12-battery case, 13-switch.

Embodiment

Below in conjunction with drawings and Examples, the utility model embodiment is described:

Fig. 1,2 shows a kind of concrete structure of the present utility model, as shown in the figure, the sxemiquantitative Ampère force exploring instrument of our development, comprise base 8, base 8 comprises that one is long and the other is short two vertical supports 3, support 3 is equipped with two axle sleeves 4, the end of long stent 3 is also fixed with a horizontal circle 1, index dial 1 is painted with horizontal evenly divided line; Battery case 12, digital electronic ammeter 9, potentiometer 10 and switch 13 are equipped with in horizontal base 8 inside, described battery case 12, digital electronic ammeter 9, potentiometer 10 and switch 13 4 are cascaded, finally be connected to positive and negative electrode binding post, concrete connected mode as shown in Figure 3; Horizontal base 8 is provided with U-shaped magnet case 5, box is painted with magnetic field markings 11, inside U-shaped magnet case 5, three pieces of U magnets can be placed side by side at most, and can move forward and backward with U-shaped magnet case 5; Horizontal base 8 is provided with coil lead 7, square coil 6 and pointer 2, coil 6 to be fixed on a transverse axis and to be arranged on axle sleeve 4, transverse axis contacts with axle sleeve 4 good and can freely rotate, the wire of coil 6 is drawn by axle sleeve 4 and is connected with the coil lead 7 be arranged on base, pointer 2 is fixed on a vertical edge of coil, rotates and rotate with wire frame.

Principle of the present utility model is as follows: when coil switch power and when being positioned in U magnet, deflects, at coil gravity under the acting in conjunction of Ampère force and coil gravity gwhen certain, Ampère force flarger, deflection angle θalso larger, and meet tan θ= f/G.The deflection of coil drives the deflection of pointer, and the deflection angle of pointer is identical with coil deflection angle.Because, pointer and horizontal scale line intersection point offset distance x, rotating shaft is to the vertical distance of scale mark h, meet relational expression tan θ= x/H, so, f=X/GH, fbe proportional to x, so just can pass through the size of the quantitative judgement Ampère force of horizontal scale.

The size of electric current is controlled by potentiometer, and concrete size is read out by reometer.So just can probe into the relation when magnetic field is constant between Ampère force and size of current.There is U magnet in magnetic field to produce, although can be similar to and find out uniform magnetic field, but in fact diverse location magnetic field size is had any different, when coil deflects, magnetic field can change, and in order to keep magnetic field constant, should move U-shaped magnet case, allow coil and magnetic field are significant to be overlapped, namely allow coil be in the same position of magnet all the time.

Changing the size in magnetic field by using different U-shaped magnets instead, probing into the relation in Ampère force and magnetic field.

By increasing or reduce magnet number to change the length of wire in magnetic field, probe into the relation between Ampère force and conductor length.

By changing the annexation between positive and negative terminal and coil lead, change direction of current; Left-hand rule is verified in the direction being changed magnetic field by the modes of emplacement changing U magnet.

By reference to the accompanying drawings the utility model preferred implementation is explained in detail above, but the utility model is not limited to above-mentioned embodiment, in the ken that those of ordinary skill in the art possess, can also make a variety of changes under the prerequisite not departing from the utility model aim.

Do not depart from design of the present utility model and scope can make many other and change and remodeling.Should be appreciated that the utility model is not limited to specific embodiment, scope of the present utility model is defined by the following claims.

Claims

1. sxemiquantitative Ampère force exploring instrument, it is characterized in that: comprise base (8), base (8) comprises that one is long and the other is short two vertical supports (3), two axle sleeves (4) support (3) are equipped with, the end of long stent (3) is also fixed with a horizontal circle (1), and index dial (1) is painted with horizontal evenly divided line;

Battery case (12), digital electronic ammeter (9), potentiometer (10) and switch (13) are equipped with in above-mentioned horizontal base (8) inside, described battery case (12), digital electronic ammeter (9), potentiometer (10) and switch (13) four are cascaded, and are finally connected to positive and negative electrode binding post;

Above-mentioned horizontal base (8) is provided with U-shaped magnet case (5), box is painted with a magnetic field markings (11), three pieces of U magnets can be placed at most side by side in U-shaped magnet case (5) the inside, and can move forward and backward with U-shaped magnet case (5);

Above-mentioned horizontal base (8) is provided with coil lead (7), square coil (6) and pointer (2), coil (6) to be fixed on a transverse axis and to be arranged on axle sleeve (4), transverse axis contacts with axle sleeve (4) good and can freely rotate, the wire of coil (6) is drawn by axle sleeve (4) and is connected with the coil lead be arranged on base (7), pointer (2) is fixed on a vertical edge of coil, rotates and rotate with wire frame.