CN212965371U

CN212965371U - Magnetic induction intensity measuring device

Info

Publication number: CN212965371U
Application number: CN202020493632.7U
Authority: CN
Inventors: 姜森
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-03-30
Filing date: 2020-03-30
Publication date: 2021-04-13
Anticipated expiration: 2030-03-30

Abstract

The utility model discloses a magnetic induction measuring device, which comprises a base (1), wherein a square upright post (2) is fixed on the base (1), the upright post (2) is connected with a lever (8) through a rotating shaft (6), the left end of the lever (8) is connected with an adjusting screw (3) through a spring (5), the right end of the lever (8) is made into a pointed needle shape, the pointed needle shape points to a scale (12), and the position of the pointed end of the lever (8) can be read out through the scale on the scale (12); the cylindrical part of the lever (8) is made hollow, and a rectangular frame (10) is arranged near the tip end; a coil (11) is wound on the rectangular frame (10), and two ends of the coil (11) penetrate through the hollow cylindrical part of the lever (8) through a lead (7) to be connected with a power supply (13).

Description

Magnetic induction intensity measuring device

Technical Field

The utility model relates to a measuring device especially relates to a magnetic induction's measuring device.

Background

The magnetic induction intensity is a physical quantity describing the strength and direction of a magnetic field, in the physics, the strength of the magnetic field is represented by the magnetic induction intensity, the higher the magnetic induction intensity is, the stronger the magnetic field is, and the lower the magnetic induction intensity is, the weaker the magnetic field is. Magnetic induction is an abstract concept, and the magnetic induction cannot be directly measured, but the aim can be achieved by measuring some indirect physical quantities.

The existing magnetic induction intensity measuring devices on the market generally read directly in measurement, and do not help much to learn and understand relevant electromagnetic knowledge in physics teaching of middle school. Therefore, no intuitive and effective measuring device is available in the middle school physics teaching at present to help students understand the concept of magnetic induction intensity.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a magnetic induction measuring device is applied to physical teaching, helps the student to study and understand relevant physical knowledge.

The utility model aims at realizing through the following technical scheme:

a magnetic induction measuring apparatus as shown in fig. 1, comprising: the device comprises a base 1, a stand column 2, an adjusting screw 3, a fixing frame 4, a spring 5, a rotating shaft 6, a lead 7, a lever 8, a magnet 9, a rectangular frame 10, a coil 11, a scale 12, a power supply 13 and a weight 14.

Base 1 on fixed square stand 2, be connected through pivot 6 and lever 8 on the stand 2, the left end of lever 8 is connected through spring 5 and adjusting screw 3, the right-hand member of lever 8 is made pointed end and is pointed the needle-like, directional scale 12, can read out the position that lever 8 is most advanced through the scale on the scale 12.

The cylindrical part of the lever 8 is made into a hollow shape, and a rectangular frame 10 is arranged close to the tip end;

the frame 10 is made of hard plastics, the upper frame of the rectangular frame 10 penetrates through the cylinder of the lever 8, the lower frame is arranged in the magnetic field of the horseshoe-shaped magnet 9, and the plane of the rectangular frame 10 is fixedly connected with the lever 8 in a right angle manner;

the rectangular frame 10 is wound with a coil 11, and both ends of the coil 11 are connected with a power supply 13 through the hollow cylindrical part of the lever 8 by leads 7.

The lower part of the upright post 2 is provided with a fixed frame 4, and after the adjusting screw 3 passes through a threaded hole on the fixed frame 4 and is connected with the spring 5, the balance of the lever 8 can be adjusted through the spring 5.

Compared with the prior art, the utility model discloses a magnetic induction measuring device, both can quantitative measure the magnetic induction in the even strong magnetic field of even measuring, can learn relevant physics knowledge again, convenient to use to simple structure, easy to operate, the practicality is strong.

Drawings

Fig. 1 is the utility model discloses a magnetic induction measuring device schematic structure.

Fig. 2 is the utility model discloses a magnetic induction measuring device removes structure schematic diagram behind magnet.

In the figure: 1. the device comprises a base, 2, a stand column, 3, an adjusting screw, 4, a fixing frame, 5, a spring, 6, a rotating shaft, 7, a lead, 8, a lever, 9, a magnet, 10, a rectangular frame, 11, a coil, 12, a scale, 13, a power supply, 14 and a weight.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the 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 embodiment of 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.

A magnetic induction measuring device, a preferred embodiment of which is shown in fig. 1.

A magnetic induction measuring device comprising:

calibrating the magnetic induction intensity measuring device;

the horseshoe magnet 9 is removed, the adjusting screw 3 is rotated on the device shown in fig. 2, so that when the lever 8 is in the horizontal equilibrium position, the pointed position of the tip of the lever 8 on the scale 12 is marked as a zero-line, then weights 14 of different masses are sequentially placed on the lower frame of the rectangular frame 10, the pointed position of the tip of the lever 8 on the scale 12 is moved downwards, the distance of the tip offset of the lever 8 per unit mass of the weight is calculated, and the tip offset is marked on the scale 12, namely the calibration of the magnetic induction measuring device is completed.

Measuring the magnetic induction intensity of the uniform magnetic field;

the coil 11 is first placed in the internal uniform magnetic field of the horseshoe magnet 9 and the adjusting screw 3 is rotated so that the lever 8 is in equilibrium with the tip of the lever 8 pointing onto the zero line of the scale 12.

Then, the coil 11 is powered on through the connecting lead 7, the value of the current passing through is set as I, at this time, under the action of the magnetic field force, the tip of the lever 8 deviates from the zero scale line of the scale 12, the scale value of the tip of the lever 8 on the scale 12 is recorded, and the magnetic field force received by the coil 11 can be calculated as F.

The lower frame length L of the rectangular frame is measured.

From the above measured values, the magnetic induction can be calculated by applying the formula B ═ F/IL.

Compared with the prior art, the utility model discloses a magnetic induction measuring device both can quantitative measure magnetic induction intensity value, can learn relevant physical knowledge again, convenient to use to simple structure, easy to operate, the practicality is strong.

The above description is only for the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are all covered by the protection scope of the present invention.

Claims

1. A magnetic induction measuring device is characterized in that: the device comprises a base (1), a stand column (2), an adjusting screw (3), a fixing frame (4), a spring (5), a rotating shaft (6), a lead (7), a lever (8), a magnet (9), a rectangular frame (10), a coil (11), a scale (12), a power supply (13) and a weight (14);

the square upright post (2) is fixed on the base (1), the upright post (2) is connected with the lever (8) through the rotating shaft (6), the left end of the lever (8) is connected with the adjusting screw (3) through the spring (5), the right end of the lever (8) is made into a pointed-end needle shape and points to the scale (12), and the position of the pointed end of the lever (8) can be read through scales on the scale (12);

the cylindrical part of the lever (8) is made into a hollow shape, and a rectangular frame (10) is arranged near the tip end;

the frame (10) is made of hard plastics, the upper frame of the rectangular frame (10) penetrates through the cylinder of the lever (8), the lower frame is arranged in the magnetic field of the horseshoe-shaped magnet (9), and the plane of the rectangular frame (10) is fixedly connected with the lever (8) in a right angle.

2. The device according to claim 1, wherein the rectangular frame (10) is wound with a coil (11), and both ends of the coil (11) are connected to the power source (13) through the hollow cylindrical portion of the lever (8) by wires (7).

3. The device for measuring magnetic induction according to claim 1, characterized in that a fixing frame (4) is installed at the lower part of the upright post (2), and after the adjusting screw (3) passes through a threaded hole on the fixing frame (4) and is connected with the spring (5), the balance of the lever (8) can be adjusted through the spring (5).