Demonstration device for rotary motion

Abstract

The utility model relates to a rotary motion demonstration device which comprises a shell, a rotary assembly, a sensor and a display module, the shell wraps the sensor, the display module and a part of the rotary assembly, the rotary assembly, the sensor and the display module are sequentially connected, the rotary assembly comprises a mass block, at least one pull wire and a first connecting piece, and the mass block is connected with the sensor. The mass block is located outside the shell and connected to the first connecting piece through at least one pull wire, the first connecting piece is arranged in the shell and connected to the sensor, and the first connecting piece is configured in the mode that when the mass block rotates around the shell in the horizontal plane, the sensor senses centripetal force of the mass block through the at least one pull wire and the first connecting piece; and displaying the sensed result by a display module. The rotary motion demonstration device is held by an observer and driven by the observer, so that the observer can change the state of the rotary motion conveniently, and the observer can also feel the experience brought by the rotary motion by holding the demonstration device.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of teaching experiment, in particular to a demonstration device of rotational motion. BACKGROUND

[0002] In the physical exploration activities, in order to enable the user to form the visualization of the cognitive theory knowledge, various instruments for reproducing physical phenomena are emerging. Among them, in the process of studying rotational motion, especially verifying centripetal force, although the existence of centripetal force can be experienced through various experimental equipment. However, in these experimental equipment on the market, a part is desktop, which means that although this type of experimental equipment can display the numerical value of the relevant physical quantity in rotational motion, it cannot let the observer experience the feeling brought by the rotational motion of the object; another part is handheld, but the handheld experimental equipment cannot provide accurate measurement values, so it cannot experience the rotational motion while verifying the experimental data obtained.

[0003] Chinese utility model patent CN219958396U discloses a centripetal force experiment demonstration instrument, which comprises a bottom frame, a tension sensor, a motor, a gear and a single-chip microcomputer are arranged in the bottom frame. However, in the whole process of experiment and sensing data, the observer has almost no opportunity to participate in the experiment, which reduces the observer's experience of the rotational motion of the object in the research process, and is not conducive to the observer's understanding of the principle of rotational motion. SUMMARY

[0004] In order to overcome the above problems of the prior art, the present application provides a demonstration device of rotational motion, which comprises a shell, a rotating assembly, a sensor and a display module, wherein the shell wraps the sensor, the display module and part of the rotating assembly, the rotating assembly, the sensor and the display module are connected in sequence, wherein:

[0005] The rotating assembly comprises a mass, at least one traction line and a first connecting piece, the mass is located outside the shell and connected to the first connecting piece through the at least one traction line, the first connecting piece is arranged in the shell and connected to the sensor, the first connecting piece is configured to, when the mass rotates around the shell in the horizontal plane, the sensor senses the centripetal force of the mass through the at least one traction line and the first connecting piece, and the sensed result is displayed by the display module.

[0006] According to one embodiment, the rotating assembly further comprises a head arranged at the top end of the housing, the head comprising a first part and a second part, the second part being connected to the housing by a first bearing, the at least one pull wire passing through the second part and extending out of a gap between the first part and the second part.

[0007] According to another embodiment, the at least one pull wire comprises a pull wire, a steering wire and a second connector, one end of the pull wire being connected to the mass, the other end of the pull wire being connected to the steering wire by the second connector, the steering wire being connected to the first connector.

[0008] According to yet another embodiment, the first connector comprises a second bearing arranged at its top end, wherein the steering wire is connected to an inner ring of the second bearing, an outer ring of the second bearing being fixed relative to the first connector.

[0009] According to yet another embodiment, the second part has a magnet; the top end of the housing further comprises a Hall switch facing the head, the Hall switch being configured to time a rotation time of a corresponding turn of the mass as the magnet rotates with the mass for each turn.

[0010] According to yet another embodiment, the sensor is in the form of a strain gauge.

[0011] According to yet another embodiment, the sensor further comprises a computing unit, the computing unit obtaining the rotation time from the Hall switch, thereby calculating a rotational angular velocity of the mass.

[0012] According to yet another embodiment, the display module is further configured to display the rotational angular velocity.

[0013] According to yet another embodiment, the display module further comprises a wireless transmission terminal configured to transmit the centripetal force and the rotational angular velocity to an external device.

[0014] According to yet another embodiment, the mass further comprises a light emitting and / or sound emitting device, the light emitting and / or sound emitting device being activated when the mass rotates around the housing in a horizontal plane.

[0015] The demonstration device of the rotational motion according to the present application is held and driven by an observer, so that the mass rotates around the shell in a horizontal plane, and the observer can change the state of the rotational motion (for example, the angular velocity of rotation), and at the same time, the observer can also personally experience the experience (for example, the centripetal force) brought by the rotational motion by holding the demonstration device. In addition, the first bearing and the second bearing are respectively arranged at the top end of the shell and the top end of the first connecting piece, so as to reduce the abrasion of the rotational motion of the mass and the at least one traction line on other components of the demonstration device as much as possible, on the one hand, prolonging the service life of the demonstration device, and on the other hand, completely transmitting the rotational centripetal force of the mass to the sensor as much as possible without damage, so as to avoid measurement errors. Furthermore, the mass itself has a light / sound emitting device, and the observer can more intuitively feel the rotational motion of the mass through various sensory ways during the experiment, so as to promote the observer to understand and verify the related physical elements of the rotational centripetal force. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0017] Figure 1 A perspective view of the demonstration device of the rotational motion according to an embodiment of the present application is shown.

[0018] Figure 2 A perspective view of the head and the first connecting piece in the demonstration device of the rotational motion of the embodiment shown is shown. Figure 1 A perspective view of the head and the first connecting piece in the demonstration device of the rotational motion of the embodiment shown is shown.

[0019] Figure 3 A simple schematic diagram of the internal circuit of the demonstration device of the rotational motion according to another embodiment of the present application is shown. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the present application more clear, the technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0021] In the description of the present application, it needs to be understood that the terms "X-axis", "Y-axis", "Z-axis", "vertical", "parallel", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0022] In the description of the present application, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0023] As shown in Figure 1 , it shows a perspective view of a rotational motion demonstration device according to an embodiment of the present application. The rotational motion demonstration device includes a housing 10, a rotating assembly 20, a sensor 30 and a display module 40. The sensor 30 and the display module 40 are completely wrapped in the housing 10, while a part of the rotating assembly 20 is also wrapped in the housing 10. In some embodiments, the sensor 30 can be in the form of a strain gauge, of course, other forms of force measuring sensor 30 are also available.

[0024] In combination with Figure 2The rotating assembly 20 comprises a mass 21 (e.g. a ball), a head 22, a pulling line 23, a steering line 24 and a first connector 25 (e.g. a connecting bolt). The mass 21 is located outside the housing 10. The head 22 is arranged at the top end of the housing 10 and comprises a first part 221 and a second part 222. The head 22 further comprises a first bearing (not shown), wherein the second part 222 is fixedly connected to one of the inner / outer rings of the first bearing, and the other of the inner / outer rings is fixed at the top end of the housing 10, whereby the second part 222 is rotatable relative to the housing 10. The first part 221 is stationary relative to the housing 10. The pulling line 23 has one end tied to the mass 21 and the other end passing through a gap between the first part 221 and the second part 222 until reaching the center of the second part 222, where it is connected to the steering line 24 by a second connector 26, e.g. a lobster claw. The steering line 24 extends downward through the second part 222 to the first connector 25 and is connected thereto. The top end of the first connector 25 is provided with a second bearing (not shown), wherein the steering line 24 is connected to the inner ring of the second bearing, and the outer ring of the second bearing is fixed at the top end of the first connector 25, whereby the steering line 24 is rotatable relative to the first connector 25. The advantage of this configuration is that, when the observer operates the demonstration device such that the mass 21 rotates around the housing 10 in the horizontal plane, the first bearing and the second bearing respectively bear the rotational movement of the second part 222 and the steering line 24, so as to prevent the rotational movement of the second part 222 and the steering line 24 from causing abrasion to the housing 10 and the first connector 25. Furthermore, the centripetal force of the mass 21 during the rotational movement can be transmitted to the first connector 25 and even to the sensor 30 without being partially borne by the second part 222 or being offset by the torsion of the steering line 24.

[0025] In other embodiments, only one pulling line 23 can be provided, which has one end tied to the mass 21 and the other end passing through the above-mentioned gap, the second part 222 and into the housing 10 until being connected to the first connector 25. When it is necessary to replace the mass 21 of different mass, compared to the previous embodiment of opening the lobster claw in order to replace the pulling line 23 and the mass 21, the present embodiment replaces the only one pulling line 23 together with the mass 21 at the first connector 25.

[0026] Further, the second part 222 is further provided with a magnet 223, which can be inferred to rotate with the second part 222 when the mass 21 rotates around the housing 10 in the horizontal plane. Conversely, the top end of the housing 10 is further provided with a Hall switch 11 facing the second part 222, which is configured to sense the passing of the magnet 223 above it when the magnet 223 rotates with the mass 21 and the second part 222 for one revolution, at which time the rotation time corresponding to the one revolution is timed.

[0027] Referring toFigure 3 Fig. 6 shows a simplified schematic diagram of the internal circuit of the demonstration device of the rotational motion according to another embodiment of the present application. It can be seen that the sensor 30 further comprises a computing unit, which is communicatively connected with the Hall switch 11. The computing unit obtains the rotation time required for one rotation from the Hall switch 11, and thus calculates the angular velocity of the mass 21. Further, the sensor 30 is communicatively connected with the display module 40, so that the display module 40 can obtain the data about the angular velocity from the sensor 30, in particular from the computing unit thereof, for external display.

[0028] With continued reference to Figure 3 On the one hand, the mass 21, the traction line 23, the steering line 24, and the first connecting member 25 are sequentially communicatively connected, and finally communicatively connected to the sensor 30 (e.g. a strain gauge), so that the sensor 30 can sense the centripetal force caused by the rotation of the mass 21. On the other hand, the Hall switch 11 cooperates with the magnet 223 to time the rotation time required for one rotation of the mass 21; then, the computing unit in the sensor 30 obtains the rotation time from the Hall switch 11, and thus calculates the angular velocity. The sensor 30 is communicatively connected with the display module 40, so that the display module 40 obtains the sensed centripetal force and the calculated angular velocity, and thus externally displays. The display module 40 further comprises a wireless transmission terminal, which is configured to transmit the values of the centripetal force and the angular velocity to an external device. The external device is for example a personal computer, a mobile intelligent terminal, etc. After the external device obtains and records the data, the data can be further processed, which is not the purpose of the present application, and thus will not be described here.

[0029] Preferably, the mass 21 can further comprise light-emitting and / or sound-emitting devices (not shown), which are activated when the mass 21 rotates around the housing 10 in the horizontal plane. In this way, when the observer operates the demonstration device, the light-emitting and / or sound-emitting devices in the mass 21 sense that the mass 21 is rotating, and thus emit light and / or sound. In particular, when the mass 21 has different angular velocities, the frequencies of the emitted light and / or sound also correspondingly change. The observer visually / hearingly perceives these light and / or sound of different frequencies, and thus more intuitively feels the changing rotational motion of the mass 21.

[0030] It should be understood that the above-described figures and specific embodiments described in the detailed description are merely exemplary embodiments of the present application, and are not exhaustive of the possible embodiments of the present application. Those skilled in the art can make various modifications to the above-described specific embodiments within the scope of the present application without departing from the spirit of the present application.

Claims

1. A demonstration device for rotational motion, comprising a housing, a rotating assembly, a sensor, and a display module, wherein the housing encloses the sensor, the display module, and a portion of the rotating assembly, and the rotating assembly, the sensor, and the display module are connected sequentially, characterized in that: The rotating assembly includes a mass, at least one traction line, and a first connector. The mass is located outside the housing and is connected to the first connector via the at least one traction line. The first connector is disposed inside the housing and connected to the sensor. The first connector is configured such that when the mass rotates around the housing in a horizontal plane, the sensor senses the centripetal force of the mass via the at least one traction line and the first connector, and the sensed result is displayed by the display module.

2. The demonstration device for rotational motion according to claim 1, characterized in that, The rotating assembly also includes a head disposed at the top of the housing, the head comprising a first portion and a second portion, the second portion being connected to the housing via a first bearing, the at least one traction line passing through the second portion and extending from the gap between the first portion and the second portion.

3. The demonstration device for rotational motion according to claim 2, characterized in that, The at least one traction line includes a traction line, a steering line, and a second connector. One end of the traction line is connected to the mass, and the other end is connected to the steering line through the second connector. The steering line is connected to the first connector.

4. The demonstration device for rotational motion according to claim 3, characterized in that, The first connector includes a second bearing disposed at its top end, wherein the steering line is connected to the inner ring of the second bearing, and the outer ring of the second bearing is fixed relative to the first connector.

5. The demonstration device for rotational motion according to claim 4, characterized in that, The second part has a magnet; the top of the housing also includes a Hall switch facing the head, the Hall switch being configured to time the rotation time corresponding to each rotation of the magnet with the mass.

6. The demonstration device for rotational motion according to claim 5, characterized in that, The sensor is in the form of a strain gauge.

7. The demonstration device for rotational motion according to claim 6, characterized in that, The sensor also includes a computing unit, which obtains the rotation time from the Hall switch and calculates the rotational angular velocity of the mass.

8. The demonstration device for rotational motion according to claim 7, characterized in that, The display module is also configured to display the rotational angular velocity.

9. The demonstration device for rotational motion according to claim 8, characterized in that, The display module also includes a wireless transmission terminal configured to transmit the values ​​of the centripetal force and the rotational angular velocity to an external device.

10. The demonstration device for rotational motion according to claim 1, characterized in that, The mass also includes light-emitting and / or sound-emitting devices, which are activated when the mass rotates around the outer shell in a horizontal plane.

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