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CN-224232265-U - Inertia reference system motion law presentation device

CN224232265UCN 224232265 UCN224232265 UCN 224232265UCN-224232265-U

Abstract

The utility model relates to an inertia reference system motion law demonstration device, which belongs to the technical field of teaching instruments and comprises a machine case, a track, an ejection device and a reference column, wherein the track is horizontally arranged on the machine case, the ejection device is movably arranged on the track and is used for ejecting a ball upwards, the reference column is fixed on the machine case, and the vertical height of the reference column is higher than the top end of the ejection device. The relative relativity principle of the Galileo is that the motion rule of the object under the coordinate system of the inertial system is the same, the ball is thrown upwards relative to the uniform linear motion coordinate system, the ball is thrown obliquely relative to the stationary coordinate system of the tabletop, and the device interprets the motion rule of the object in the inertial reference system in a visual and clear experimental phenomenon and depth.

Inventors

  • WANG YUFENG

Assignees

  • 北京北交益智教学仪器技术有限公司

Dates

Publication Date
20260512
Application Date
20250425

Claims (8)

  1. 1. The inertia reference system motion law demonstration device is characterized by comprising a case (1), a track (2), an ejection device and a reference column (3), wherein: The track (2) is horizontally arranged on the chassis (1), the ejection device is movably arranged on the track (2), and the ejection device is used for ejecting the ball upwards; the reference column (3) is fixed on the chassis (1), the vertical height of the reference column (3) is higher than the top end of the ejection device, a yielding space allowing the ejection device to pass through is arranged between the reference column (3) and the track (2), and the ball body can stride over the reference column (3) after being ejected by the ejection device and fall back onto the ejection device passing through the yielding space.
  2. 2. The inertia reference system motion law demonstration device according to claim 1, wherein the reference column (3) is horizontally arranged, connecting columns are fixed at two ends of the reference column (3), and the bottom ends of the connecting columns are fixedly connected with two opposite sides of the chassis (1) respectively.
  3. 3. The inertia reference system motion law demonstration device according to claim 2, wherein a controller (8) is arranged on the side face of the case (1), and the controller (8) is electrically connected with the ejection device.
  4. 4. The inertia reference system motion law demonstration device according to claim 3, wherein a power supply is arranged in the case (1), and the power supply is electrically connected with the controller (8).
  5. 5. The inertial reference system motion law demonstration device according to any one of claims 1 to 4, wherein limiting blocks (4) are arranged at two ends of the track (2), and the limiting blocks (4) are used for limiting displacement of the ejection device.
  6. 6. The inertia reference system motion law demonstration device according to claim 5, wherein the ejection device comprises a base (5), a spring (6) and a ball seat (7), the base (5) is movably arranged on the track (2), the ball is located in the ball seat (7), a first end of the spring (6) is connected with the base (5), and the other end of the spring (6) is connected with the ball seat (7).
  7. 7. The inertia reference system motion law demonstration device of claim 6, wherein the ejection device further comprises an electromagnet arranged in the base (5), the electromagnet is magnetically attracted with the ball seat (7) when in an electrified state, and the ball seat (7) ejects the ball under the action of the spring when the electromagnet is in a power-off state.
  8. 8. The inertial frame of reference motion law presentation device according to claim 7, wherein said inertial frame of reference motion law presentation device further comprises a controller (8) and a position sensor, wherein: The position sensor is used for detecting the distance between the base (5) and the reference column (3); the controller (8) is electrically connected with the position sensor and the electromagnet, and the controller (8) is used for controlling the electromagnet to be in a power-off state when the distance between the base (5) and the reference column (3) reaches a set value.

Description

Inertia reference system motion law presentation device Technical Field The utility model belongs to the technical field of teaching instruments, and particularly relates to an inertial reference system motion law demonstration device. Background In the physical teaching process, the motion law of an object in an inertial reference system belongs to a core and abstract knowledge plate. Students simply rely on theoretical explanation and static diagram, and are very difficult to understand the essence. The traditional teaching means lack visual and dynamic demonstration ways, so that students always float on the surface to understand the knowledge, and a complete and accurate knowledge framework is difficult to construct. Existing partially physical demonstration instruments exist with a number of short plates when presenting inertial frame of reference knowledge. Such as fuzzy demonstration phenomenon, incapability of clearly showing the difference of object motion characteristics under different inertial reference systems, poor instrument stability, poor repeatability of experimental results, difficulty in giving students reliable observation basis, complex operation, and adverse effect on efficient demonstration in limited time of class. Therefore, aiming at the problem that the existing demonstration instrument is fuzzy in demonstration phenomenon and cannot clearly demonstrate the difference of the motion characteristics of objects under different inertial reference systems, the demonstration device for the motion law of the inertial reference system needs to be provided. Disclosure of utility model The utility model provides a demonstration device for motion rules of an inertial reference system, which is used for solving the problem that the demonstration phenomenon of the existing demonstration instrument is fuzzy and the difference of object motion characteristics under different inertial reference systems cannot be clearly demonstrated. The utility model is realized by the following technical scheme that the device comprises a case, a track, an ejection device and a reference column, wherein: the track is horizontally arranged on the chassis, the ejection device is movably arranged on the track, and the ejection device is used for ejecting the ball upwards; The reference column is fixed on the chassis, the vertical height of the reference column is higher than the top end of the ejection device, a yielding space allowing the ejection device to pass through is arranged between the reference column and the track, and the ball body can cross the reference column after being ejected by the ejection device and fall back onto the ejection device passing through the yielding space. In order to better realize the utility model, the structure is further optimized, the reference column is horizontally arranged, the two ends of the reference column are fixedly provided with connecting columns, and the bottom ends of the connecting columns are fixedly connected with the two opposite sides of the chassis respectively. In order to better realize the utility model, the structure is further optimized, a controller is arranged on the side face of the case, and the controller is electrically connected with the ejection device. In order to better realize the utility model, the structure is further optimized, and a power supply is arranged in the case and is electrically connected with the controller. In order to better realize the utility model, the structure is further optimized, two ends of the rail are provided with limiting blocks, and the limiting blocks are used for limiting the displacement of the ejection device. In order to better realize the utility model, the structure is further optimized, the ejection device comprises a base, a spring and a ball seat, wherein the base is movably arranged on the track, the ball is positioned in the ball seat, the first end of the spring is connected with the base, and the other end of the spring is connected with the ball seat. In order to better realize the utility model, the structure is further optimized, the ejection device also comprises an electromagnet arranged in the base, the electromagnet is magnetically attracted with the ball seat when in an electrified state, and the ball seat ejects the ball body under the action of the spring when in a power-off state. In order to better realize the utility model, the structure is further optimized, and the inertial reference system motion law demonstration device further comprises a controller and a position sensor, wherein: the position sensor is used for detecting the distance between the base and the reference column; the controller is electrically connected with the position sensor and the electromagnet, and is used for controlling the electromagnet to be in a power-off state when the distance between the base and the reference column reaches a set value. Compared with the prior art, the utility model has the following