CN211124643U - Ampere force demonstration instrument for teaching aid - Google Patents

Abstract

The utility model discloses a teaching aid ampere force demonstration instrument, which relates to the technical field of physical teaching devices, and comprises an insulating bottom plate, a conductor tube, a controller, a display screen, a current meter and a student power supply, wherein the insulating bottom plate is provided with two insulating side plates, two conductor bars are detachably connected between the two insulating side plates, a magnet group is placed under the conductor bars, a pressure detection module is arranged on the side surface of one insulating side plate close to the magnet group, and the student power supply, the pressure detection module and the display screen are respectively and electrically connected with the controller; the conductor tube is arranged on the two conductor rods, and the two conductor rods, the conductor tube, the sliding rheostat, the student power supply ammeter and the switch are sequentially connected in series to form a loop. The utility model discloses can make the student see the size of the circular telegram conductor atress in different magnetic fields, different electric currents of different length directly perceivedly to learn better, understand the physics essence and the relevant application of physics phenomenon.

Description

Ampere force demonstration instrument for teaching aid

Technical Field

The utility model relates to a physical teaching technical field, in particular to teaching aid ampere force demonstration appearance.

Background

The ampere force magnetic field part is one of the important contents in high school physics learning. The new session requires students to understand the concept of ampere force and to be able to speak the conditions under which ampere force is generated. However, in the experimental teaching of high school physics, students cannot visually observe the stress condition of the conductor, and there are many inconveniences in changing the length of the conductor, the magnitude of the magnetic field and the current. The high school students lack intuitive perceptual knowledge when understanding the acting force of the magnetic field on the electrified conductor.

The application provides a teaching aid ampere force demonstration appearance and solves above-mentioned problem.

SUMMERY OF THE UTILITY MODEL

For overcoming the problem that exists among the above-mentioned background art, the utility model provides a teaching aid ampere force demonstration appearance can make the student see the size of the circular telegram conductor atress in different magnetic fields, different electric currents of different length directly perceivedly to learn better, understand the physics essence and the relevant application of physics phenomenon.

The technical scheme of the utility model is that:

A teaching aid ampere force demonstration instrument comprises an insulating bottom plate, a conductor tube, a controller, a display screen, a current meter and a student power supply;

The top surface of the insulating bottom plate is symmetrically provided with two insulating side plates, and the two insulating side plates are provided with a pair of conductor bars;

A plurality of through holes matched with the conductor bars are transversely and uniformly formed in the side face of each insulating side plate, and each conductor bar is inserted into two opposite through holes;

A magnet group is arranged right below the two conductor bars and consists of at least two strong magnets;

A pressure detection module for detecting ampere force is arranged on a side vertical axis of one insulating side plate close to the magnet group, and the pressure detection module is positioned above the through hole;

The conductor tubes are arranged on the two conductor rods, a sliding rheostat is connected between one end of one conductor rod and the student power supply, one end of the other conductor rod is connected with the ammeter through a switch, the ammeter is connected with the student power supply in series, and the student power supply, the pressure detection module and the display screen are respectively electrically connected with the controller.

Preferably, the conductor tube is made of stainless steel, and the surfaces of the conductor bar and the conductor tube are smooth.

Preferably, the pressure detection module is composed of a force sensing film pressure sensor signal conversion module and a film pressure sensor.

Preferably, a thin conductor rod is placed in the inner cavity of the conductor tube, and the length of the thin conductor rod is the same as that of the conductor tube.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses simple structure, the experiment is easily operated, and visual degree is high, can make the student see the circular telegram conductor of different length the size of atress in different magnetic fields, different electric currents directly perceivedly to learn better, understand the physics essence and the relevant application of physics phenomenon.

Drawings

FIG. 1 is a block diagram of the present invention;

FIG. 2 is a schematic view of the present invention without conductor bars installed;

Fig. 3 is a schematic view of the magnet assembly of the present invention;

Fig. 4 is a circuit connection block diagram of the present invention;

Fig. 5 is a circuit diagram of the present invention.

Description of reference numerals: 100-insulating bottom plate, 101-insulating side plate, 102-conductor rod, 103-through hole, 104-conductor tube, 105-thin conductor rod, 106-magnet group, 107-pressure detection module.

Detailed Description

In the following, the technical solutions of the embodiments of the present invention are described clearly and completely with reference to the drawings in the present application, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall fall within the protection scope of the present invention.

Examples

As shown in fig. 1-4, the utility model provides a teaching aid ampere force demonstration instrument, which comprises an insulating bottom plate 100, a conductor tube 104, a controller, a display screen, an ammeter and a student power supply; the top surface of the insulating bottom plate 100 is symmetrically provided with two insulating side plates 101, and the two insulating side plates 101 are provided with a pair of conductor bars 102; a plurality of through holes 103 matched with the conductor rods 102 are uniformly arranged on the side surface of each insulating side plate 101 in the transverse direction, and each conductor rod 102 is inserted into two opposite through holes 103; a magnet group 106 is arranged right below the two conductor bars 102, and the magnet group 106 is composed of at least two strong magnets;

A pressure detection module 107 for detecting an ampere force is arranged on a side vertical axis of one insulating side plate 101 close to the magnet group 106, and the pressure detection module 107 is positioned above the through hole 103; the conductor tube 104 is placed on the two conductor bars 102, a sliding rheostat is connected between one end of one conductor bar 102 and the student power supply, one end of the other conductor bar 102 is connected with the ammeter through a switch, the ammeter is connected with the student power supply in series, and the student power supply, the pressure detection module 107 and the display screen are respectively and electrically connected with the controller.

Specifically, the conductor tube 104 is a stainless steel material, and the surfaces of the conductor bar 102 and the conductor tube 104 are smooth. A demonstration circuit is formed among one conductor bar 102, the slide rheostat, the student power supply, the ammeter, the switch, the other conductor bar 102 and the conductor tube 104. The pressure detection module 107 is composed of a force sensing film pressure sensor signal conversion module and a film pressure sensor.

As shown in FIG. 5, the controller is MSP430G2553 single chip microcomputer, the display screen is O L ED12864 liquid crystal screen, the model of the force-sensing thin film pressure sensor signal conversion module is RP-C-MK02, and the model of the thin film pressure sensor is RFP 602. the minimum circuit system of the controller belongs to the prior art, which is not shown in FIG. 5, the connection relationship between the display screen and the force-sensing thin film pressure sensor signal conversion module and the controller is that VCC pin of the force-sensing thin film pressure sensor signal conversion module is connected with power supply, GND pin is grounded, DO pin is connected with P1.4 pin of the controller, 5 and 6 pins are output ends and are correspondingly connected with input pins 1 and 2 of the thin film pressure sensor, VCC pin of the display screen is connected with power supply, GND pin is grounded, SC L and SDA pins are respectively connected with P2.4 and 2.3 pins of the controller, VCC pin of the controller is connected with power supply, and GND pin is grounded.

In this embodiment:

1) The two conductor bars 102 may be removed from the through-holes 103, one of the conductor bars 102 may be removed, and then may be mounted in the other through-hole 103, and the interval between the two conductor bars 102 may be changed.

2) The magnitude of the magnetic field can be changed by changing the number of strong magnets directly below the conductor bar 102.

3) The sliding rheostat can change the current.

4) By adjusting the student power supply, the direction of current flow can be changed.

5) The magnetic field can be changed by changing the polar placing direction of the strong magnet.

The working principle is as follows: the switch is closed, the circuit is conducted, the circuit forms a passage through the conductor tube 104, the conductor tube 104 is electrified, the conductor tube starts to move under the action of a strong magnetic field below, after the conductor tube strikes a film pressure sensor in the pressure detection module, the controller processes pressure signals collected by the pressure detection module, and ampere force read data is displayed through the display screen.

The utility model discloses can demonstrate the atress condition under the different conditions according to the control variable method, specifically as follows:

1) Demonstrating the stress of electrified conductors with different lengths in the same magnetic field and the same current;

2) Demonstrating the stress of electrified conductors with the same length in different magnetic fields and the same current;

3) Demonstrating the stress of the electrified conductors with the same length in the same magnetic field and different currents;

4) The demonstration current directions are different, and the stress directions of the electrified conductors in the magnetic fields in the same direction are different;

5) The demonstration current direction is the same, and the stress directions of the electrified conductors in magnetic fields in different directions are different.

The utility model discloses can be above different conditions under carry out ampere force demonstration, the convenience is carried out atress comparison and analysis to the ampere force under different conditions.

Furthermore, a thin conductor bar 105 is placed in the inner cavity of the conductor tube 104, the length of the thin conductor bar 105 is the same as that of the conductor tube 104, and the thin conductor bar 105 can ensure that the effect of the conductor tube 104 impacting the film pressure sensor is optimal, so that the measured ampere force data is more accurate.

The above disclosure is only for the preferred embodiments of the present invention, however, the present invention is not limited thereto, and any changes that can be considered by those skilled in the art shall fall within the protection scope of the present invention.

Claims (4)

1. The demonstration instrument for the teaching aid ampere force is characterized by comprising an insulating base plate (100), a conductor tube (104), a controller, a display screen, a current meter and a student power supply;

The top surface of the insulating bottom plate (100) is symmetrically provided with two insulating side plates (101), and the two insulating side plates (101) are provided with a pair of conductor bars (102);

A plurality of through holes (103) matched with the conductor bars (102) are transversely and uniformly formed in the side surface of each insulating side plate (101), and each conductor bar (102) is inserted into two opposite through holes (103);

A magnet group (106) is arranged right below the two conductor bars (102), and the magnet group (106) is composed of at least two strong magnets;

A pressure detection module (107) for detecting ampere force is arranged on a side vertical axis of one insulating side plate (101) close to the magnet group (106), and the pressure detection module (107) is positioned above the through hole (103);

The conductor tube (104) is placed on the two conductor bars (102), a sliding rheostat is connected between one end of one conductor bar (102) and the student power supply, one end of the other conductor bar (102) is connected with the ammeter through a switch, the ammeter is connected with the student power supply in series, and the student power supply, the pressure detection module (107) and the display screen are respectively and electrically connected with the controller.

2. A teaching aid ampere force demonstration instrument as claimed in claim 1, wherein the conductor tube (104) is stainless steel and the surfaces of the conductor bar (102) and the conductor tube (104) are smooth.

3. A teaching aid ampere force demonstration instrument as claimed in claim 1, wherein the pressure detection module (107) is comprised of a force sensing diaphragm pressure sensor signal conversion module and a diaphragm pressure sensor.

4. A teaching aid ampere-force demonstration instrument as claimed in claim 1, wherein a thin conductor bar (105) is placed in the lumen of the conductor tube (104), and the thin conductor bar (105) is the same length as the conductor tube (104).

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