Motion law demonstration device of inertial reference system

Abstract

The utility model relates to an inertial reference system motion law demonstration device, which belongs to the technical field of teaching instruments, and comprises a case, a track, an ejection device and a reference column, the track is horizontally arranged on the case, the ejection device is movably arranged on the track, and the ejection device is used for ejecting a ball upwards; the reference column is fixed to the machine box, and the vertical height of the reference column is larger than the top end of the ejection device. The relative relativity principle of the demonstrated Galileo is that the motion laws of the objects under the coordinate system of the inertial system are the same, and relative to the constant-speed linear motion coordinate system, the ball does the upcast motion; relative to a static coordinate system of the desktop, the ball does an oblique projectile motion; the device deeply explains the motion law of an object in an inertial reference system through a visual and clear experiment phenomenon.

Description

Technical Field

[0001] This utility model belongs to the field of teaching instrument technology, and specifically relates to a device for demonstrating the motion laws of an inertial reference frame. Background Technology

[0002] In the process of physics teaching, the laws governing the motion of objects in an inertial frame of reference are a core and abstract area of ​​knowledge. Students find it extremely difficult to grasp their essence by relying solely on theoretical explanations and static diagrams. Traditional teaching methods lack intuitive and dynamic demonstrations, causing students' understanding of this knowledge to often remain superficial, making it difficult to build a complete and accurate knowledge framework.

[0003] Existing physics demonstration instruments have several shortcomings when presenting knowledge related to inertial frames of reference. For example, the demonstrated phenomena are blurry, failing to clearly show the differences in the motion characteristics of objects under different inertial frames of reference; the instruments lack stability, resulting in poor repeatability of experimental results and making it difficult to provide students with reliable observation data; and the operation is complex, which is not conducive to conducting efficient demonstrations within the limited time of class.

[0004] Therefore, in order to address the problem that existing demonstration instruments produce blurry images and fail to clearly demonstrate the differences in the motion characteristics of objects under different inertial reference frames, it is necessary to provide a device for demonstrating the motion laws of inertial reference frames. Utility Model Content

[0005] This invention provides a device for demonstrating the motion laws of an inertial reference frame, which solves the problem that existing demonstration instruments produce blurry results and cannot clearly show the differences in the motion characteristics of objects under different inertial reference frames.

[0006] This utility model is achieved through the following technical solution: it includes a chassis, a track, a catapult device, and a reference column, wherein:

[0007] The track is horizontally set on the chassis, and the ejection device is movably set on the track. The ejection device is used to eject the ball upward.

[0008] The reference post is fixed to the chassis. The vertical height of the reference post is higher than the top of the ejection device. A clearance space is provided between the reference post and the track to allow the ejection device to pass through. After the ball is ejected by the ejection device, it can cross the reference post and fall back onto the ejection device that has passed through the clearance space.

[0009] To better realize this utility model, further optimizations are made to the above structure. The reference column is set horizontally, and connecting columns are fixed at both ends of the reference column. The bottom ends of the connecting columns are fixedly connected to the opposite sides of the chassis.

[0010] To better realize this utility model, the above structure is further optimized by providing a controller on the side of the chassis, which is electrically connected to the ejection device.

[0011] To better realize this utility model, the above structure is further optimized by providing a power supply inside the chassis, which is electrically connected to the controller.

[0012] To better realize this utility model, the above structure is further optimized by providing limiting blocks at both ends of the track, which are used to limit the displacement of the ejection device.

[0013] To better realize this utility model, further optimizations are made to the above structure. The ejection device includes a base, a spring, and a ball seat. The base is movably disposed on the track. The ball is located inside the ball seat. The first end of the spring is connected to the base, and the other end of the spring is connected to the ball seat.

[0014] To better realize this utility model, further optimizations are made to the above structure. The ejection device also includes an electromagnet disposed in the base. When the electromagnet is energized, it is magnetically attracted to the ball seat. When the electromagnet is de-energized, the ball seat ejects the ball under the action of the spring.

[0015] To better realize this utility model, further optimizations are made to the above structure. The inertial reference frame motion law demonstration device further includes a controller and a position sensor, wherein:

[0016] The position sensor is used to detect the distance between the base and the reference post;

[0017] The controller is electrically connected to the position sensor and the electromagnet. The controller is used to control the electromagnet to be de-energized when the distance between the base and the reference column reaches a set value.

[0018] Compared with the prior art, this utility model has the following advantages:

[0019] This utility model provides a device for demonstrating the motion laws of an inertial reference frame, comprising a chassis, a track, a launching device, and a reference column. The track is horizontally positioned on the chassis, and the launching device is movably mounted on the track, used to launch a sphere upwards. The reference column is fixed to the chassis, its vertical height exceeding the top of the launching device. A clearance space is provided between the reference column and the track, allowing the launching device to pass through. After being launched, the sphere crosses the reference column and falls back onto the launching device, which has passed through the clearance space. This structure demonstrates Galileo's principle of relativity, which states that the motion laws of objects are the same in an inertial reference frame. Relative to a uniform linear motion coordinate system, the sphere undergoes upward projectile motion; relative to a stationary coordinate system on the table, it undergoes oblique projectile motion. This device provides a clear and intuitive experimental demonstration, deeply illustrating the motion laws of objects in an inertial reference frame. It provides efficient and high-quality teaching tools for physics education, stimulates students' interest in learning, and improves learning outcomes; at the same time, it provides reliable experimental equipment for researchers to conduct relevant principle verification and for science popularizers to disseminate knowledge. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a front view of the inertial reference frame motion law demonstration device of this utility model;

[0022] Figure 2 This is a left view of the inertial reference frame motion law demonstration device of this utility model.

[0023] In the picture:

[0024] 1-Chassis; 2-Railway; 3-Reference post; 4-Limit block; 5-Base; 6-Spring; 7-Spherical seat; 8-Controller. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0026] In the description of this utility model, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] Example 1:

[0029] A device for demonstrating the motion laws of an inertial frame of reference includes a housing 1, a track 2, a launch device, and a reference column 3, wherein:

[0030] The aforementioned track 2 is horizontally arranged on the aforementioned housing 1, and the aforementioned ejection device is movably arranged on the aforementioned track 2. The aforementioned ejection device is used to eject the ball upward.

[0031] The reference post 3 is fixed on the chassis 1. The vertical height of the reference post 3 is higher than the top of the ejection device. A clearance space is provided between the reference post 3 and the track 2 to allow the ejection device to pass through. After the ball is ejected by the ejection device, it can cross the reference post 3 and fall back onto the ejection device that has passed through the clearance space.

[0032] The above structure demonstrates Galileo's principle of relativity, which states that the motion of objects is the same in an inertial frame of reference. Relative to a coordinate system of uniform linear motion, the ball undergoes upward projectile motion; relative to the stationary coordinate system of the table, it undergoes oblique projectile motion. This device provides a clear and intuitive experimental demonstration, deeply illustrating the motion of objects in an inertial frame of reference. It offers an efficient and high-quality teaching tool for physics education, stimulating students' interest and improving learning outcomes. Simultaneously, it provides reliable experimental equipment for researchers to verify relevant principles and for science communicators to disseminate knowledge.

[0033] The aforementioned reference column 3 is horizontally positioned, with connecting columns fixed at both ends. The bottom ends of the connecting columns are fixedly connected to the opposite sides of the aforementioned chassis 1. That is, the reference column straddles the chassis, and the movement of the launch device is achieved using a linear servo module, as is currently known.

[0034] A controller 8 is provided on the side of the aforementioned chassis 1, and the controller 8 is electrically connected to the aforementioned catapult device. The controller controls the forward and reverse movement of the catapult device. The integrated circuit chip inside the controller has good anti-interference capabilities, ensuring stable and reliable motion control.

[0035] The aforementioned chassis 1 contains a power supply, which is electrically connected to the aforementioned controller 8. The power supply provides power to the controller.

[0036] Both ends of the aforementioned track 2 are equipped with limiting blocks 4, which are used to restrict the displacement of the aforementioned catapult device. The limiting blocks at both ends of the track ensure that the catapult device can only move on the track.

[0037] The aforementioned ejection device includes a base 5, a spring 6, and a ball seat 7. The base 5 is movably mounted on the track 2. The ball is located within the ball seat 7. One end of the spring 6 is connected to the base 5, and the other end of the spring 6 is connected to the ball seat 7. That is, the spring provides an upward elastic force to the ball seat, ejecting the ball.

[0038] The aforementioned ejection device also includes an electromagnet housed within the base 5. When the electromagnet is energized, it magnetically attracts the ball seat 7. When the electromagnet is de-energized, the ball seat 7 ejects the ball under the action of the spring 6. The electromagnet is used to control the opening and compression of the spring.

[0039] The aforementioned demonstration device for the motion laws of an inertial reference frame also includes a controller 8 and a position sensor, wherein:

[0040] The aforementioned position sensor is used to detect the distance between the aforementioned base 5 and the aforementioned reference post 3;

[0041] The controller 8 is electrically connected to the position sensor and the electromagnet. The controller 8 is used to control the electromagnet to be de-energized when the distance between the base 5 and the reference post 3 reaches a set value.

[0042] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A device for demonstrating the motion laws of an inertial reference frame, characterized in that: Includes a chassis (1), a track (2), a catapult, and a reference post (3), wherein: The track (2) is horizontally set on the chassis (1), and the ejection device is movably set on the track (2). The ejection device is used to eject the ball upward. The reference post (3) is fixed on the chassis (1). The vertical height of the reference post (3) is higher than the top of the ejection device. A clearance space is provided between the reference post (3) and the track (2) to allow the ejection device to pass through. After the ball is ejected by the ejection device, it can cross the reference post (3) and fall back onto the ejection device that passes through the clearance space.

2. The device for demonstrating the motion laws of an inertial reference frame according to claim 1, characterized in that: The reference column (3) is set horizontally, and connecting columns are fixed at both ends of the reference column (3). The bottom ends of the connecting columns are fixedly connected to the opposite sides of the chassis (1).

3. The device for demonstrating the motion laws of an inertial reference frame according to claim 2, characterized in that: The side of the chassis (1) is provided with a controller (8), which is electrically connected to the ejection device.

4. The device for demonstrating the motion laws of an inertial reference frame according to claim 3, characterized in that: The chassis (1) is equipped with a power supply, which is electrically connected to the controller (8).

5. A device for demonstrating the motion laws of an inertial reference frame according to any one of claims 1-4, characterized in that: Both ends of the track (2) are provided with limiting blocks (4), which are used to limit the displacement of the ejection device.

6. The device for demonstrating the motion laws of an inertial reference frame according to claim 5, characterized in that: The ejection device includes a base (5), a spring (6), and a ball seat (7). The base (5) is movably mounted on the track (2). The ball is located inside the ball seat (7). The first end of the spring (6) is connected to the base (5), and the other end of the spring (6) is connected to the ball seat (7).

7. The device for demonstrating the motion laws of an inertial reference frame according to claim 6, characterized in that: The ejection device also includes an electromagnet installed in the base (5). When the electromagnet is energized, it magnetically attracts the ball seat (7). When the electromagnet is de-energized, the ball seat (7) ejects the ball under the action of the spring.

8. The device for demonstrating the motion laws of an inertial reference frame according to claim 7, characterized in that: The inertial reference frame motion law demonstration device also includes a controller (8) and a position sensor, wherein: The position sensor is used to detect the distance between the base (5) and the reference column (3); The controller (8) is electrically connected to the position sensor and the electromagnet. The controller (8) is used to control the electromagnet to be in a de-energized state when the distance between the base (5) and the reference column (3) reaches a set value.

Images