Uniform variable speed linear motion law demonstrator

Abstract

The utility model discloses a uniform variable-speed linear motion law demonstrator, which comprises a support arranged on an external supporting surface, and a pipeline clamping structure is arranged on the support. The transparent pipe is installed on the pipeline clamping structure, and the inclination angle of the transparent pipe is adjusted according to the experiment; the size of the shading column is matched with the inner diameter size of the transparent tube, the shading column slides in the transparent tube, and openings are formed in the two ends of the transparent tube; the transmitting device is detachably connected to the lower end of the transparent tube, and the transmitting device is mounted on the transparent tube according to an experiment; the infrared optical couplers are of existing structures, and the multiple infrared optical couplers are arranged on the outer wall of the transparent tube at intervals; the position of the infrared optical coupler on the tube wall of the transparent tube is adjusted according to requirements. Based on the above structure, the law of uniformly accelerated linear motion, uniformly decelerated linear motion, free fall motion and vertical upcast motion is quickly and efficiently demonstrated, and the purposes of simplifying the operation structure and reducing the operation difficulty are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of teaching instruments and equipment, in particular to a uniformly variable speed linear motion law demonstrator. Background Art

[0002] The compulsory middle school physics curriculum introduces various forms of motion, including uniformly accelerated linear motion, uniformly decelerated linear motion, free fall, and vertical projectile motion. Most schools currently demonstrate uniformly accelerated and decelerated linear motion using the "trolley and paper tape" method; or they demonstrate free fall using the "stroboscopic photography" or "weight and paper tape" methods. The drawbacks of these methods are the cumbersome experimental procedures and large errors in the experimental results. Furthermore, there are virtually no corresponding demonstration devices for vertical projectile motion. Utility Model Content

[0003] In response to the above-mentioned defects in the existing technology, a uniformly accelerated linear motion law demonstrator is provided, which can quickly and efficiently demonstrate the laws of uniformly accelerated linear motion, uniformly decelerated linear motion, free fall motion and vertical upward throw motion, thereby simplifying the operating structure and reducing the difficulty of operation.

[0004] The technical solution adopted by the present invention to solve the above technical problems is:

[0005] The uniformly variable speed linear motion law demonstrator is characterized by:

[0006] A bracket is placed on the external support surface and is provided with a pipe clamping structure;

[0007] A transparent tube and a light-shielding column. The transparent tube is mounted on a pipe clamping structure, and the inclination angle of the transparent tube is adjusted by the pipe clamping device according to the experiment. The size of the light-shielding column matches the inner diameter of the transparent tube. The light-shielding column slides inside the transparent tube, and both ends of the transparent tube are provided with openings.

[0008] A launching device is connected to the lower end of the transparent tube in a detachable manner. The launching device is installed on the transparent tube according to the experiment.

[0009] Infrared photocoupler: The infrared photocoupler is an existing structure, and multiple infrared photocouplers are arranged at intervals on the outer wall of the transparent tube; the position of the infrared photocoupler on the wall of the transparent tube is adjusted according to needs.

[0010] According to the above technical solution, a level measuring instrument is provided on the transparent tube. The level measuring instrument is an existing structure. When the transparent tube is adjusted to a vertical state, the level measuring instrument detects that it is in a horizontal state.

[0011] According to the above technical solution, it also includes a processor and a computer, and the processor and the computer are both existing structures; the processor is electrically connected to each infrared optical coupler, and the computer is connected to the processor.

[0012] According to the above technical solution, the transparent tube adopts the existing high-transparency polycarbonate tube, and a millimeter scale is provided on the outer wall of the tube. According to the experimental requirements, multiple infrared optical couplers are installed and fixed in areas with different scales.

[0013] According to the above technical solution, a plurality of vent holes are provided on the tube wall.

[0014] According to the above technical solution, the launching device includes a launching frame, a launching rod, and a rubber band. The launching frame is installed on the transparent tube through a threaded connection. A guide hole and a rubber band hanging groove are provided on the launching frame. The size of the guide hole matches the size of the launching rod, and the axis of the guide hole and the axis of the transparent tube are on the same straight line; two rubber band hanging grooves are symmetrically arranged on both sides of the guide hole, and a through hole is provided on the launching rod. The circular rubber band passes through the through hole, and the two ends are respectively hung in the rubber band hanging grooves on both sides.

[0015] According to the above technical solution, intervals or drawing scales marked with paint are provided on the launching rod according to the specifications of the selected rubber band.

[0016] According to the above technical solution, the level measuring instrument includes a sleeve, a spirit level bracket, and a spirit bubble meter. The sleeve is fixed on the transparent tube, and the two are coaxial. The sleeve and the spirit level bracket are fixedly connected, the spirit bubble meter is fixed on the spirit level bracket, and the axis of the sleeve is perpendicular to the plane where the spirit bubble meter is located.

[0017] According to the above technical solution, the infrared photocoupler is fixed on the transparent tube by connecting with a strapping tape; the infrared photocoupler includes a frame matching the transparent tube, a photocoupler arranged on the frame, a wire and a strapping tape.

[0018] According to the above technical solution, the bracket includes a base and a column vertically arranged on the base; the pipe clamping structure includes a horizontal clamp, a clamping rod, and a pipe clamp, the horizontal clamp is composed of two arc-shaped hoops, the axis of one arc-shaped hoop is arranged vertically, and the axis of the other arc-shaped hoop is arranged horizontally; the clamping rod is fixed in the horizontally arranged arc-shaped hoop in a detachable connection manner, the pipe clamp is arranged at the end of the clamping rod, and the axis of the pipe clamp is perpendicular to the axis of the clamping rod; the transparent tube is fixed in the pipe clamp, and the axes of the two coincide; the angle of the axis of the pipe clamp is adjusted by rotating the clamping rod.

[0019] The utility model has the following beneficial effects:

[0020] 1. Set up an inclined pipe to ensure that the trajectory of the light-shielding column's movement is in a straight line; and use the component of the light-shielding column's own gravity as the force applied to the light-shielding column to ensure that the force on the light-shielding column is constant; thereby ensuring that the acceleration of the light-shielding column is constant during movement. Secondly, a transmitting device is provided at the lower end of the transparent tube to ensure that the light-shielding column obtains a larger initial velocity during the uniformly decelerated linear motion. Finally, multiple infrared optical couplers are provided on the transparent tube to collect the movement signal of the light-shielding column through the multiple infrared optical couplers, and other components convert the movement signal into the speed and time of the light-shielding column passing through the infrared optical coupler. Based on the above process, the experimental operation of uniformly accelerated or uniformly decelerated linear motion is completed simply, efficiently, and accurately, reducing the difficulty of teaching experimental operation.

[0021] 2. A level measuring instrument is provided on the transparent tube to facilitate adjustment of the transparent tube to a vertical state, so that the device can complete the experimental operations of free fall motion and vertical upward throwing motion.

[0022] 3. The movement of the light-shielding column is detected by infrared photocouplers, which output a potential signal to the processor. After receiving the potential signal, the processor, according to an existing program, converts it into the time t and velocity v corresponding to the light-shielding column's passage through the infrared photocouplers. The processor then transmits the time t and velocity v corresponding to each infrared photocoupler to a computer, where an existing program displays an intuitive vt graph. Furthermore, the operator reads the spacing between the infrared photocouplers and inputs it into the computer, which also displays an intuitive xt graph. This structure facilitates the operator's exploration of the displacement patterns of uniformly accelerated linear motion.

[0023] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and to implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0024] The specific implementation of the present invention is given in detail by the following examples and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0026] Figure 1 This is a schematic structural diagram of a uniformly accelerated linear motion experiment according to an embodiment of the present invention;

[0027] Figure 2 This is a schematic structural diagram of a uniformly decelerated linear motion experiment according to an embodiment of the present invention;

[0028] Figure 3 This is a schematic structural diagram of a free-fall motion experiment according to an embodiment of the present invention;

[0029] Figure 4 This is a structural diagram of a vertical throwing motion experiment provided by an embodiment of the present invention;

[0030] Figure 5 This is a schematic structural diagram of a bracket according to an embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram of a pipe clamping structure according to an embodiment of the present invention;

[0032] Figure 7 This is a schematic structural diagram of a launch device according to an embodiment of the present invention;

[0033] Figure 8 This is a schematic structural diagram of an infrared optical coupler according to an embodiment of the present invention;

[0034] Figure 9 This is a schematic structural diagram of a level measuring instrument according to an embodiment of the present invention;

[0035] Figure 10 This is a schematic diagram of the connection between the infrared optical coupler, the computer and the processor provided in the embodiment of the utility model;

[0036] In the figure, 1. bracket; 1-1. base; 1-2. column; 2. pipe clamping structure; 2-1. level clamp; 2-2. clamping rod; 2-3. pipe clamp; 3. transparent tube; 4. light-shielding column; 5. launching device; 5-1. launching frame; 5-2. launching rod; 5-3. rubber band; 5-4. rubber band hanging groove; 6. infrared photocoupler; 6-1. frame; 6-2. photocoupler; 6-3. wire; 6-4. strapping tape; 7. level measuring instrument; 7-1. sleeve; 7-2. level bracket; 7-3. bubble level; 8. millimeter scale; 9. processor; 10. computer. DETAILED DESCRIPTION

[0037] The following is combined with Figure 1-10 The principles and features of the present invention are described, and the examples provided are intended only to illustrate the present invention and are not intended to limit the scope of the present invention. The following paragraphs describe the present invention in more detail by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become more apparent from the following description and claims. It should be noted that the drawings are greatly simplified and not to exact scale, and are intended solely to facilitate and clearly illustrate the embodiments of the present invention.

[0038] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a central component. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are intended only to describe specific embodiments and are not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0040] Reference Figures 1 to 10 As shown, the utility model provides a uniformly variable speed linear motion law demonstrator.

[0041] Example 1

[0042] include

[0043] A bracket 1 is placed on an external support surface and a pipe clamping structure 2 is provided on the bracket;

[0044] Transparent tube 3 and light-shielding column 4. The transparent tube is mounted on a pipe clamping structure, and the inclination angle of the transparent tube is adjusted by the pipe clamping device according to the experiment. The size of the light-shielding column matches the inner diameter of the transparent tube. The light-shielding column slides inside the transparent tube. Both ends of the transparent tube are provided with openings.

[0045] Launching device 5, the launching device is connected to the lower end of the transparent tube in a detachable manner. According to the experiment, the launching device is installed on the transparent tube;

[0046] Infrared optical coupler 6, the infrared optical coupler is an existing structure, and multiple infrared optical couplers are arranged at intervals on the outer wall of the transparent tube; the position of the infrared optical coupler on the wall of the transparent tube is adjusted according to needs.

[0047] In this embodiment, a transparent tube is mounted on a bracket and adjusted to an inclined position. Multiple infrared photocouplers are spaced apart on the tube wall. As the light-shielding column moves within the transparent tube, the multiple infrared photocouplers collect movement signals. Other components convert these signals into the speed and time it takes for the light-shielding column to pass through the corresponding infrared photocoupler. This information is then used to measure the spacing between the corresponding infrared photocouplers, thereby achieving an automatic uniform speed-variable motion pattern.

[0048] Specifically, a uniformly accelerated linear motion experiment was conducted. The launching device was disassembled, and the light-shielding column was dropped from the higher end of the transparent tube. Under the action of the component of its own gravity along the length direction of the tube, the light-shielding column slid downward along the inclined transparent tube to ensure that the movement of the light-shielding column in the tube was uniformly accelerated linear motion. At this time, multiple infrared optical couplers arranged at intervals were used to monitor the speed and time of the light-shielding column during the uniformly accelerated linear motion, and the spacing between the corresponding infrared optical couplers was read to obtain the vt diagram and xt diagram during the uniformly accelerated motion.

[0049] In a uniformly decelerated linear motion experiment, a launch device was installed at the lower end of a transparent tube. A light-shielding column was dropped from the upper end of the tube. The launch device was then activated, giving the light-shielding column a certain initial velocity and launching it from the lower end. Under the influence of its own weight along the length of the tube, the light-shielding column slid upward along the inclined transparent tube, ensuring uniformly decelerated linear motion within the tube. Multiple infrared optocouplers were used to monitor the speed and time of the light-shielding column's uniformly decelerated linear motion, thereby obtaining vt and xt diagrams of the uniformly accelerated motion.

[0050] Based on the above structure, an inclined pipe is provided to ensure that the trajectory of the light-shielding column's movement is a straight line; and the component of the light-shielding column's own gravity is used as the force exerted on the light-shielding column to uniformly accelerate or decelerate it, ensuring that the force on the light-shielding column is constant; thereby ensuring that the acceleration of the light-shielding column is constant during its movement. Secondly, a launching device is provided at the lower end of the transparent tube to ensure that the light-shielding column obtains a larger initial velocity during the uniformly decelerated linear motion. Based on the above process, the experimental operation of uniformly accelerated or uniformly decelerated linear motion is completed simply, efficiently, and accurately, reducing the difficulty of the teaching experimental operation.

[0051] Example 2

[0052] The structure and principle of embodiment 2 are similar to those of embodiment 1, except that: Figure 3-4 As shown, in order to facilitate the experimental operations of free fall and vertical upward throwing, a level measuring instrument 7 is provided on the transparent tube. The level measuring instrument is an existing structure. When the transparent tube is adjusted to a vertical state, the level measuring instrument detects that it is in a horizontal state.

[0053] Preferably, Figure 9 As shown, the level comprises a sleeve 7-1, a level bracket 7-2, and a bubble level 7-3. The sleeve is fixed to a transparent tube, and the two are coaxial. The sleeve and the level bracket are fixedly connected, and the bubble level is fixed to the level bracket, with the axis of the sleeve perpendicular to the plane on which the bubble level is located. After the level is mounted on the transparent tube, the bubble level can be used to detect whether the transparent tube is in a vertical position. In the embodiment shown in the figure, the level is mounted on the top of the transparent tube.

[0054] In Example 1-2, in order to facilitate the detection of information collected by multiple infrared photocouplers, a processor 9 and a computer 10 are also included. The processor and the computer are both existing structures; the processor is electrically connected to each infrared photocoupler, and the computer is connected to the processor. Since the length of the light-shielding column is smaller than the size of the entire movement path of the light-shielding column, the speed of the light-shielding column itself changes less during the period when the light-shielding column blocks the infrared photocoupler. It is assumed that the light-shielding column moves at a uniform speed during the period when the light-shielding column blocks the infrared photocoupler. The processor records the time points T1 and T2 when the light-shielding column blocks a certain infrared photocoupler. The length of the light-shielding column is X, the time when the light-shielding column passes through the infrared photocoupler is T2-T1, and the corresponding speed is T1 is used as the time point corresponding to the speed of the infrared photocoupler; the distance between adjacent infrared photocouplers is read and input into the computer; thus, the vt graph and xt graph of this experiment are formed.

[0055] In Examples 1-2, the transparent tube uses an existing high-transparency polycarbonate tube, and a millimeter scale 8 is provided on the outer wall of the tube. According to experimental requirements, multiple infrared optical couplers are installed and fixed in areas with different scales.

[0056] In Example 1-2, in order to reduce the resistance of air to the light-shielding column, a plurality of ventilation holes are provided on the tube wall.

[0057] Example 3

[0058] The structure and principle of Example 3 are similar to those of Example 1, except that a preferred form of the launching device is provided, and other forms may also be adopted, as long as the shading column is given an initial velocity within a set range at the bottom end of the transparent tube.

[0059] like Figure 7 As shown, the launching device includes a launching frame 5-1, a launching rod 5-2, and a rubber band 5-3. The launching frame is mounted on a transparent tube via a threaded connection. The launching frame is provided with a guide hole and a rubber band hanging slot 5-4. The size of the guide hole matches the size of the launching rod, and the axis of the guide hole and the axis of the transparent tube are aligned. Two rubber band hanging slots are symmetrically arranged on either side of the guide hole. The launching rod is provided with a through hole, through which a circular rubber band passes, with its ends respectively hanging in the rubber band hanging slots on either side. In this embodiment, when the operator pulls the launching rod, the rubber band is also pulled with the launching rod, elastically deforming the rubber band and accumulating elastic potential energy. When the operator releases the launching rod, the accumulated elastic potential energy of the rubber band drives the launching rod to move within the guide hole, thereby indirectly driving the light-shielding column to move upward within the transparent tube at a certain initial velocity.

[0060] In Example 3, in order to facilitate the operator to give the light-shielding column an ​​appropriate initial velocity range during the experiment, intervals or pulling scales marked with paint are provided on the launching rod according to the specifications of the selected rubber band. When the lower end of the guide hole is located in the paint interval, the speed given to the light-shielding column by the launching rod is within the appropriate initial velocity range.

[0061] Based on Examples 1-3, a preferred structure of infrared optical coupler is given, such as Figure 8 As shown, the infrared optical coupler is fixed on the transparent tube by using a strapping tape; the infrared optical coupler includes a frame 6-1 matching the transparent tube, an optical coupler 6-2 arranged on the frame, a wire 6-3 and a strapping tape 6-4.

[0062] Based on Examples 1-3, a preferred support structure and pipe clamping structure are provided, such as Figure 5 As shown, the bracket includes a base 1-1 and a column 1-2 vertically arranged on the base; Figure 6 As shown, the pipe clamping structure includes a horizontal clamp 2-1, a clamping rod 2-2, and a pipe clamp 2-3. The horizontal clamp is composed of two arc-shaped hoops, the axis of one arc-shaped hoop is arranged vertically, and the axis of the other arc-shaped hoop is arranged horizontally; the clamping rod is fixed in the horizontally arranged arc-shaped hoop in a detachable connection manner, and the pipe clamp is arranged at the end of the clamping rod, and the axis of the pipe clamp is perpendicular to the axis of the clamping rod; the transparent tube is fixed in the pipe clamp, and the axes of the two coincide; the angle of the pipe clamp axis is adjusted by rotating the clamping rod.

[0063] The working principle and process of this utility model:

[0064] Since the length of the light-shielding column is smaller than the size of the entire motion path of the light-shielding column, the speed change of the light-shielding column itself is small during the period when the light-shielding column blocks the infrared light coupler. By default, the light-shielding column blocks the infrared light coupler and moves at a constant speed. Taking the embodiment in the figure as an example, there are four infrared light couplers, namely the first, second, third and fourth infrared light couplers, and the corresponding light-shielding column passing times are t1 and t2, t3 and t4, t5 and t6, t7 and t8, respectively. Therefore, the time and speed corresponding to the first light coupler are t1 and t2. The time and speed corresponding to the second optocoupler are t3 and The time and speed corresponding to the third optocoupler are t4 and The time and speed corresponding to the fourth optocoupler are t7 and Read the distance between adjacent infrared photocouplers and input it into the computer to form the vt graph and xt graph of this experiment.

[0065] Specifically:

[0066] This utility model demonstrates the method of uniform acceleration linear motion law, such as Figure 1shown

[0067] Step 1: Keep a large angle between the transparent tube and the horizontal plane to ensure that the light-shielding column can slide down quickly in the tube; the optical coupler, microprocessor and computer are connected as follows: Figure 10 Show.

[0068] Step 2: Let the light-shielding column slide into the tube from the upper end of the tube; the light-shielding column performs uniformly accelerated linear motion in the tube, and the time t when it passes the optical coupler and the corresponding speed v are recorded by the microprocessor and sent to the computer; the experimenter reads the position scale value x of each optical coupler on the tube.

[0069] Step 3: The experimenter explores the law of speed change of uniformly accelerated linear motion through v, t values ​​or vt images; and explores the law of displacement change of uniformly accelerated linear motion through x, t values ​​or xt images.

[0070] This utility model demonstrates the method of uniform deceleration linear motion law, such as Figure 2 As shown,

[0071] Step 1: Install the transparent tube horizontally or at a certain angle; put the light shielding column into the tube; nest the launcher at the bottom port of the tube, and let the launch rod support the light shielding column; connect the optical coupler, microprocessor and computer as follows Figure 10 Show.

[0072] Step 2: Pull the launch rod backward to tighten the rubber band (pay attention to the interval or pulling scale marked with paint on the launch rod to avoid excessive force). After letting go, the light-shielding column acquires an initial upward velocity under the action of the launch rod; the light-shielding column decelerates in the tube, and the time t and corresponding speed v passed by the optical coupler are recorded by the microprocessor and sent to the computer; the experimenter reads the position scale value x of each optical coupler on the tube.

[0073] Step 3: The experimenter explores the law of speed change of uniformly accelerated linear motion through v, t values ​​or vt images; and explores the law of displacement change of uniformly accelerated linear motion through x, t values ​​or xt images.

[0074] This utility model demonstrates the method of free fall motion law, such as Figure 3 As shown,

[0075] Step 1: Install the level bracket on the upper end of the transparent tube through the sleeve, put the bubble level on the level bracket, and use the bubble level to adjust the transparent tube to a vertical fixed state; in order to highlight the characteristic of the free fall motion with an initial velocity of 0, the top optical coupler should be as close to the upper end of the tube as possible; the optical coupler, microprocessor and computer are connected as follows Figure 10 Show.

[0076] Step 2: Let the light-shielding column fall into the tube from the upper end without initial velocity; the time t when the light-shielding column passes the optical coupler and the corresponding speed v are recorded by the microprocessor and sent to the computer; the experimenter reads the position scale value x of each optical coupler on the tube.

[0077] Step 3: The experimenter explores the law of velocity change of uniformly accelerated linear motion through v, t values ​​or vt images; and explores the law of displacement change of uniformly accelerated linear motion through x, t values ​​or xt images.

[0078] This utility model demonstrates the method of vertical throwing motion law, such as Figure 4 As shown,

[0079] Step 1: Install the level bracket on the upper end of the transparent tube through the sleeve, put the bubble level on the level bracket, and use the bubble level to adjust the transparent tube to a vertical fixed state; put the light shielding column into the tube from the lower end; install the launcher on the lower end of the tube, and let the launch rod support the light shielding column; the optical coupler, microprocessor and computer are connected as follows Figure 10 Show.

[0080] Step 2: Pull the launch rod backward to tighten the rubber band (pay attention to the interval or pulling scale marked with paint on the launch rod to avoid excessive force). After letting go, the light-shielding column obtains an initial vertical upward velocity under the action of the launch rod; the light-shielding column performs a vertical upward motion in the tube, and the time t and corresponding speed v of the optical coupler are recorded by the microprocessor and sent to the computer; the experimenter reads the position scale value x of each optical coupler on the tube.

[0081] Step 3: The experimenter explores the law of speed change of uniformly accelerated linear motion through v, t values ​​or vt images; and explores the law of displacement change of uniformly accelerated linear motion through x, t values ​​or xt images.

[0082] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Any ordinary technician in this industry can smoothly implement the present invention as shown in the drawings and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with this profession without departing from the scope of the technical solution of the present invention using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the scope of protection of the technical solution of the present invention.

Claims

1. A uniformly variable speed linear motion law demonstrator, characterized by: include A bracket is placed on the external support surface and is provided with a pipe clamping structure; A transparent tube and a light-shielding column. The transparent tube is mounted on a pipe clamping structure, and the inclination angle of the transparent tube is adjusted by the pipe clamping device according to the experiment. The size of the light-shielding column matches the inner diameter of the transparent tube. The light-shielding column slides inside the transparent tube, and both ends of the transparent tube are provided with openings. A launching device is connected to the lower end of the transparent tube in a detachable manner. The launching device is installed on the transparent tube according to the experiment. Infrared photocoupler: The infrared photocoupler is an existing structure, and multiple infrared photocouplers are arranged at intervals on the outer wall of the transparent tube; the position of the infrared photocoupler on the wall of the transparent tube is adjusted according to needs.

2. The uniformly accelerated linear motion law demonstrator according to claim 1, characterized in that: A level measuring instrument is provided on the transparent tube. The level measuring instrument is an existing structure. When the transparent tube is adjusted to a vertical state, the level measuring instrument detects that it is in a horizontal state.

3. The uniformly accelerated linear motion law demonstrator according to claim 1 or 2, characterized in that: It also includes a processor and a computer, both of which are existing structures; the processor is electrically connected to each infrared optical coupler, and the computer is connected to the processor.

4. The uniformly accelerated linear motion law demonstrator according to claim 1, characterized in that: The transparent tube uses an existing high-transparency polycarbonate tube with millimeter scales on the outer wall of the tube. According to experimental requirements, multiple infrared optical couplers are installed and fixed in areas with different scales.

5. The uniformly accelerated linear motion law demonstrator according to claim 1 or 4, characterized in that: A plurality of vent holes are provided on the tube wall.

6. The uniformly accelerated linear motion law demonstrator according to claim 1, characterized in that: The launching device includes a launching frame, a launching rod, and a rubber band. The launching frame is installed on the transparent tube through a threaded connection. A guide hole and a rubber band hanging groove are provided on the launching frame. The size of the guide hole matches the size of the launching rod, and the axis of the guide hole and the axis of the transparent tube are on the same straight line; two rubber band hanging grooves are symmetrically arranged on both sides of the guide hole, and a through hole is provided on the launching rod. The circular rubber band passes through the through hole, and the two ends are hung in the rubber band hanging grooves on both sides respectively.

7. The uniformly accelerated linear motion law demonstrator according to claim 6, characterized in that: According to the specifications of the selected rubber band, intervals or pulling scales marked with paint are provided on the launching rod.

8. The uniformly accelerated linear motion law demonstrator according to claim 2, characterized in that: The level measuring instrument includes a sleeve, a spirit level bracket, and a bubble level. The sleeve is fixed on the transparent tube, and the two are coaxial. The sleeve and the spirit level bracket are fixedly connected, the bubble level is fixed on the spirit level bracket, and the axis of the sleeve is perpendicular to the plane where the bubble level is located.

9. The uniformly accelerated linear motion law demonstrator according to claim 1, characterized in that: The infrared photocoupler is fixed on the transparent tube by using a strapping connection method; the infrared photocoupler includes a frame matching the transparent tube, a photocoupler arranged on the frame, a wire and a strapping.

10. The uniformly accelerated linear motion law demonstrator according to claim 1, characterized in that: The bracket includes a base and a column vertically arranged on the base; the pipe clamping structure includes a horizontal clamp, a clamping rod, and a pipe clamp, the horizontal clamp is composed of two arc-shaped hoops, the axis of one arc-shaped hoop is arranged vertically, and the axis of the other arc-shaped hoop is arranged horizontally; the clamping rod is fixed in the horizontally arranged arc-shaped hoop in a detachable connection manner, the pipe clamp is arranged at the end of the clamping rod, and the axis of the pipe clamp is perpendicular to the axis of the clamping rod; the transparent tube is fixed in the pipe clamp, and the axes of the two coincide; the angle of the axis of the pipe clamp is adjusted by rotating the clamping rod.

Images