Experimental teaching aid for simulating sun shadow measurement of guytometer
By designing an experimental teaching aid including a table model, a horizon model and a sun model, the problem of non-standard and easy deformation exists when students make simple tables by themselves, simplifying experimental operations and accurately simulating the changes in the four seasons of the sun, improving the teaching effect.
Patent Information
- Application Number
- CN202323451156.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-18
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2033-12-18
AI Technical Summary
In the prior art, when students make simple watches and use flashlights to simulate the sun, there are problems such as unstandard and easy to deform, no relatively certain guide rails moving to the flashlight, and obvious phantoms or ghosts around the surroundings when the flashlight is irradiated, affecting the simulation experiment effect.
Design an experimental teaching aid to simulate the sun shadow measurement of the guitar, including the guitar model, the horizon model and the sun model. The gauze model consists of a horizontal gauze plate and a vertical gauze plate, the horizon model consists of a horizontal substrate and a semi-circular arc track, and the sun model consists of a slider, a battery, a switch and a light bulb. The slider slides along the semi-circular arc track to simulate the rising and falling of the sun.
Through this experimental teaching aid, students can quickly assemble various modules, simplify experimental operations, reduce experimental difficulty, accurately simulate and observe changes in the sun shadows and seasons, and improve teaching effectiveness.
Smart Images
Figure CN222600378U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of teaching aids, in particular to an experimental teaching aid for simulating a gnomon to measure the sun's shadow. Background Art
[0002] The guibiao is a traditional astronomical instrument in ancient China. It has the functions of identifying directions and determining solar terms. The guibiao consists of two parts: the gui and the biao. The part parallel to the horizon is called the gui, and the part vertical to the horizon is called the biao. The endpoints of the two parts are connected.
[0003] In the sixth grade science textbook, there is an experiment to make a simple gnomon to observe the changes of the shadows in the four seasons. The purpose is to allow students to observe the experimental phenomena and explore the causes behind them through modular experiments, and to connect natural phenomena with scientific knowledge. This simulation experiment mainly has two parts: one is to determine the use requirements of the gnomon and simulate the conditions required for the shadow of the gnomon; the other is to simulate the use of the gnomon to observe the changes of the sun's shadow in the four seasons. If the students make a simple gnomon and use a flashlight to simulate the sun to complete the above experiment, there are problems such as the gnomon made is not standard and easy to deform, the flashlight has no relatively determined guide track when moving, and there are obvious virtual shadows or double images around when the flashlight is irradiated, which affect the effect of the simulation experiment. Therefore, in order to appropriately reduce the difficulty of the experiment and improve the teaching effect of the experiment, it is necessary to design a teaching aid dedicated to the experiment. Utility Model Content
[0004] The utility model provides an experimental teaching aid for simulating the sundial to measure the sun's shadow, aiming to overcome the above-mentioned shortcomings of the current experiment.
[0005] The utility model provides a technical solution to the above-mentioned technical problems as follows: an experimental teaching aid for simulating the use of a gnomon to measure the sun's shadow, comprising a gnomon model, a horizon model and a sun model, the gnomon model comprising a long horizontal gnomon plate and a long vertical gnomon plate, the vertical gnomon plate being arranged at one end of the horizontal gnomon plate, the horizon model comprising a horizontal substrate with direction marks on the upper surface, a plurality of groups of slots being symmetrically arranged on the left and right sides of the horizontal substrate, each group of the slots being provided for corresponding insertion and fixing of the left and right ends of a vertically arranged semicircular track, the sun model comprising a slider, a battery, a switch and a light bulb, the slider being slidably connected to the semicircular track, the battery, the switch and the light bulb being fixed on the slider, the light bulb being electrically connected to the battery and the switch being able to control the power on and off of the light bulb, and the horizontal gnomon plate being placed on the upper surface of the horizontal substrate.
[0006] On the basis of the above technical solution, the present invention can also be improved as follows.
[0007] Furthermore, the semi-circular track is provided with a semi-circular slide groove which is bent and extended in the left and right directions. The slider includes a front panel, a rear panel and an intermediate clip connecting the front panel and the rear panel. The intermediate clip is inserted into the semi-circular slide groove and can slide along the semi-circular slide groove. The light bulb is fixed to the front surface of the front panel, and the battery and the switch are fixed to the rear surface of the rear panel.
[0008] The beneficial effect of adopting the above-mentioned further scheme is that the front and rear panels are preferably rectangular plates and wider than the semi-circular arc slide groove, while the middle clip strip is narrower and can be designed to be an arc strip that matches the shape of the semi-circular arc groove. The slider can only have the freedom to move along the semi-circular arc slide groove on the semi-circular arc track, and is restricted and positioned in other directions (such as the front and rear directions), is not easy to fall off, and is easy to operate.
[0009] Furthermore, a power box is fixed on the rear side of the rear panel, the switch is fixed to one end of the power box, and the battery is installed in the power box.
[0010] The beneficial effect of adopting the above further solution is that it is convenient to remove and install the battery and to electrically connect the battery to the circuit connecting the light bulb and the switch.
[0011] Furthermore, the horizontal substrate is a rectangular plate, the slots are located at left and right sides of the rear portion of the horizontal substrate, and the direction mark is located at the upper left corner or the upper right corner of the front portion of the horizontal substrate.
[0012] The beneficial effect of adopting the above further solution is that, when the slot is located at the rear of the horizontal substrate, more space for placing the gnomon model is reserved at the front of the horizontal substrate.
[0013] Furthermore, the direction mark includes a cross-shaped marking line indicating east, west, south and north, and the left, right, front and rear directions of the rectangular plate correspond to the west, east, north and south directions of the cross-shaped marking line respectively.
[0014] The beneficial effect of adopting the above further scheme is that it is convenient for students to observe the direction of the sun's movement and the orientation of the gnomon during the experiment.
[0015] Furthermore, a rectangular frame-shaped alignment mark is provided in the middle of the front part of the horizontal base plate to indicate the placement position of the horizontal guide plate. The alignment mark is the same size and shape as the bottom surface of the horizontal guide plate, and the front-to-back center line of the alignment mark is located in the symmetry plane of the semicircular arc track.
[0016] The beneficial effect of adopting the above further solution is that the alignment of the marking lines can guide students to place the gnomon model faster and more standardly.
[0017] Furthermore, there are three semi-circular arc tracks, namely large, medium and small, and three groups of slots are provided correspondingly. The three semi-circular arc tracks are arranged on the horizontal substrate at intervals from front to back and from large to small, and the three semi-circular arc tracks share the same symmetry plane.
[0018] The beneficial effect of adopting the above further solution is that semicircular arc tracks of different sizes can facilitate the simulation of the sun at different heights and angles in different seasons.
[0019] Furthermore, the horizontal guide plate and the horizontal base plate are acrylic plates.
[0020] The beneficial effect of adopting the above further scheme is that it is convenient for students to draw the length position of the sun shadow on the horizontal guide plate or horizontal substrate with a pencil or a marker during the experiment and then erase it for repeated use.
[0021] Compared with the prior art, the beneficial effects of the utility model are:
[0022] The device has a gnomon model, a horizon model and a sun model. During experimental teaching, the modules can be quickly assembled. After assembly, the horizontal substrate of the horizon model simulates the ground, and the slider and the light bulb in the sun model slide left and right along the semicircular track to simulate the sun rising in the east and setting in the west. Students can place the gnomon model on the horizontal substrate, and simulate the conditions for the formation of the shadow of the gnomon by adjusting the placement of the gnomon and the position of the sun. After the conditions for the formation of the shadow are explored, the length of the shadow on the gnomon changes when the light bulb moves on different semicircular tracks, so as to achieve the purpose of simulating the observation of the change of the sun shadow in four seasons. This set of experimental teaching aids can simplify the experimental operation, reduce the difficulty of the experiment, and achieve the experimental purpose better and more accurately, thereby improving the teaching effect of the experiment. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 A top view of an experimental teaching aid for simulating the sundial measuring the sun's shadow provided by the utility model when looking down from the rear side (only one semicircular arc track at the rear is installed);
[0024] Figure 2 for Figure 1 A rear view of the experimental teaching aid shown;
[0025] Figure 3 for Figure 1 A top view of the horizontal substrate in the experimental teaching aid shown looking down from the rear side;
[0026] Figure 4 for Figure 1 The rear view of the semicircular arc track in the experimental teaching aid shown;
[0027] Figure 5 for Figure 1A top view of the slider and the components mounted thereon in the experimental teaching aid, looking down from the rear side;
[0028] Figure 6 A top view of a horizontal substrate with alignment markings.
[0029] Figure 7 This is a photo of the experimental teaching aid for measuring the sun's shadow using a simulated gnomon, with three semicircular tracks installed on a horizontal base plate, as viewed from the upper back side.
[0030] In the accompanying drawings, the components represented by the reference numerals are listed as follows:
[0031] 1. Horizontal guide plate; 2. Vertical plate; 3. Direction mark; 4. Horizontal base plate; 5. Slot; 6. Semi-circular track; 7. Slider; 8. Battery; 9. Switch; 10. Light bulb; 11. Semi-circular slide; 12. Alignment mark; 701. Front panel; 702. Rear panel; 703. Middle card strip; 704. Power supply box. DETAILED DESCRIPTION
[0032] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.
[0033] In the description of the present invention, if terms indicating orientation such as "up", "down", "left", "right", "top", "bottom", "inside" and "outside" are used, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0034] like Figures 1 to 6 As shown, the utility model provides an experimental teaching aid for simulating the measurement of the sun's shadow by a gnomon, comprising a gnomon model, a horizon model and a sun model, the gnomon model comprising a long horizontal gnomon plate 1 and a long vertical plate 2, the vertical plate 2 being arranged at one end of the horizontal gnomon plate 1, the horizon model comprising a horizontal substrate 4 with a direction mark 3 on the upper surface, a plurality of groups of slots 5 being symmetrically arranged on the left and right sides of the horizontal substrate 4, each group of the slots 5 being provided for corresponding insertion and fixing of the left and right ends of a vertically arranged semicircular track 6, the sun model comprising a slider 7, a battery 8, a switch 9 and a light bulb 10, the slider 7 being slidably connected to the semicircular track 6, the battery 8, the switch 9 and the light bulb 10 being fixed on the slider 7, the light bulb 10 being electrically connected to the battery 8 and the switch 9 being able to control the power on and off of the light bulb 10, the horizontal gnomon plate 1 being placed on the upper surface of the horizontal substrate 4.
[0035] It should be noted that, during the experimental teaching, students are first guided to think of the ancients' understanding of heaven and earth as "the sky is round and the earth is square". On this basis, a square bottom plate (horizontal substrate) printed with east, south, west and north is used as the "ground", an arc-shaped bracket (semicircular track) with a slide slot is used as the "sky", and a small light (slider and light bulb, etc.) with a movable switch in the slide slot is used as the "sun". The conditions required for exploring the shadow of the gnomon are simulated, that is, "in the middle of the earth", that is, the gnomon is an instrument for measuring the shadow of the sun shining on an object at noon, and it needs to be placed in the north-south direction. Among them, the width and length of the horizontal gui plate and the vertical plate in the guibiao model can be scaled according to the size of the existing guibiao, and the length of the horizontal gui plate is about one-third of the side length of the horizontal substrate (preferably square). In order for the slider to stay more accurately at the top of the semicircular track, a centering mark can be set in the middle of the semicircular track and the slider.
[0036] In the teaching aids provided by the present invention, the conventional flashlight is abandoned in the selection of lamps because the flashlight will produce "double images" and "virtual images", and light bulbs, switches, and batteries are selected as the "sun". In order to make the lamp lighter, 1.5V light bulbs and batteries are selected. The connection is completed by electric welding as much as possible to reduce the entanglement of wires. It is preferably equipped with a matching battery box for easy reuse.
[0037] In one embodiment of the utility model, a semi-circular arc groove 11 is provided on the semi-circular arc track 6 and is bent and extended in the left and right directions. The slider 7 includes a front panel 701, a rear panel 702 and an intermediate clip 703 connecting the front panel 701 and the rear panel 702. The intermediate clip 703 is inserted into the semi-circular arc groove 11 and can slide along the semi-circular arc groove 11. The light bulb 10 is fixed to the front surface of the front panel 701, and the battery 8 and the switch 9 are fixed to the rear surface of the rear panel 702.
[0038] It should be noted that the front and rear panels are preferably rectangular plates with a width greater than the middle card strip. In this way, the slider on the semi-circular track only has the freedom to slide left and right along the bending direction of the semi-circular slide groove but has no freedom in the front and back directions or other directions. This is convenient for operation and can more accurately simulate the rising and setting of the sun. It is also beneficial to the relative accuracy of measuring the position of the sun shadow line in different groups of experiments.
[0039] In one embodiment of the present invention, a power box 704 is fixed on the rear side of the rear panel 702 , the switch 9 is fixed to one end of the power box 704 , and the battery 8 is installed in the power box 704 .
[0040] It should be noted that the power box can be fixed to the rear panel by glue or screws, and the power cord can pass through the slider and be electrically connected to the bulb mounting seat (lamp holder) in the front, which is equivalent to building the power cord in, avoiding the power cord from being entangled when exposed and affecting the sliding of the slider along the semi-circular arc groove.
[0041] In one embodiment of the present invention, the horizontal substrate 4 is a rectangular plate, the slots 5 are located on the left and right sides of the rear of the horizontal substrate 4 , and the direction mark 3 is located at the upper left corner or upper right corner of the front of the horizontal substrate 4 .
[0042] It can be understood that the preferred horizontal substrate is a square plate, the side length of which is preferably between 40-60 cm, and the thickness of which is preferably between 0.8-1.5 cm.
[0043] In one embodiment of the present invention, the direction mark 3 includes a cross-shaped marking line indicating east, west, south and north, and the left, right, front and rear directions of the rectangular plate correspond to the west, east, north and south directions respectively.
[0044] In one embodiment of the utility model, a rectangular frame-shaped alignment mark 12 for indicating the placement position of the horizontal guide plate 1 is also provided in the middle of the front portion of the horizontal base plate 4. The alignment mark 12 is the same size and shape as the bottom surface of the horizontal guide plate 1, and the front-to-back center line of the alignment mark 12 is located in the symmetry plane of the semicircular arc track 6.
[0045] It can be understood that the above-mentioned rectangular frame-shaped alignment lines and their features of being the same size and shape as the horizontal guide plate are only preferred methods. In fact, there can also be only alignment lines at the front and rear ends, or even only the front, rear, left or right side alignment lines can also play a role in guiding the placement of the horizontal guide plate.
[0046] In one embodiment of the utility model, the semi-circular arc tracks 6 are large, medium and small, and the slots 5 are provided with three groups accordingly. The three semi-circular arc tracks 6 are arranged on the horizontal substrate 4 in a spaced manner from front to back and from large to small, and the three semi-circular arc tracks 6 share the same symmetry plane.
[0047] It is understandable that the semi-circular arc tracks are not limited to three, but can also be four or more, and can be flexibly set according to needs. The diameter ratio of the above-mentioned large, medium and small semi-circular arc tracks is preferably 1.29:1.14:1, and the actual sizes are preferably 32.2cm, 28.5cm and 25cm. The interval between two adjacent semi-circular arc tracks in the front and rear directions is preferably 5-10cm. For a more realistic and accurate simulation, the size and front and rear interval of the semi-circular arc track can be based on the data in the "Table of Changes in Sunrise and Sunset Times and Noon Sun Elevation Angles in Beijing Area", and can be drawn with a computer first, measured, and then produced.
[0048] In one embodiment of the present invention, the horizontal guide plate 1 and the horizontal base plate 4 are acrylic plates.
[0049] The experimental teaching aids corresponding to the above embodiments are made into physical pictures, such as Figure 7 As shown in the figure, the simulated gnomon shadow measurement experimental device is equipped with three semicircular arc tracks at the same time.
[0050] This experimental teaching aid is used in teaching. It adopts the ancient concept of "the sky is round and the earth is square". Through exploration experiments, students know that the gnomon can only be used at noon and the gnomon must be placed in the south and north to successfully produce a certain length of sun shadow on the horizontal gnomon. Then, through progressive exploration experiments, students can personally discover that the shadow length of the gnomon changes regularly with the change of the seasons, and thus understand that the change in the height of the sun is the reason for the change in shadow length. Through this set of experimental teaching aids, the experimental operation can be simplified, the difficulty of the experiment can be reduced, and the experimental purpose can be achieved better and more accurately, thereby improving the teaching effect of the experiment.
[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. An experimental teaching aid for simulating the use of a gnomon to measure the sun's shadow, comprising a gnomon model, a horizon model and a sun model, characterized in that: The sundial model comprises a long horizontal sundial plate (1) and a long vertical sundial plate (2), wherein the vertical sundial plate (2) is arranged at one end of the horizontal sundial plate (1); the horizon model comprises a horizontal base plate (4) with a direction mark (3) on the upper surface, and a plurality of groups of slots (5) are symmetrically arranged on the left and right sides of the horizontal base plate (4), wherein each group of the slots (5) can be inserted and fixed at the left and right ends of a vertically arranged semicircular arc track (6) correspondingly; the sundial model comprises a slider (7), a battery (8), a switch (9) and a light bulb (10), wherein the slider (7) is slidably connected to the semicircular arc track (6), the battery (8), the switch (9) and the light bulb (10) are all fixed on the slider (7), the light bulb (10) is electrically connected to the battery (8) and the switch (9) can control the light bulb (10) to be powered on or off, the horizontal guide plate (1) is placed on the upper surface of the horizontal substrate (4); the semi-circular arc tracks (6) are large, medium and small in total, and the slots (5) are correspondingly provided with three groups, the three semi-circular arc tracks (6) are arranged on the horizontal substrate (4) in a spaced manner from front to back and from large to small, and the three semi-circular arc tracks (6) share the same symmetry plane.
2. The experimental teaching aid for simulating the sundial to measure the sun's shadow according to claim 1, characterized in that: The semi-circular track (6) is provided with a semi-circular slide groove (11) which is bent and extended in the left-right direction; the slider (7) comprises a front panel (701), a rear panel (702) and an intermediate clip (703) connecting the front panel (701) and the rear panel (702); the intermediate clip (703) is inserted into the semi-circular slide groove (11) and can slide along the semi-circular slide groove (11); the light bulb (10) is fixed to the front side surface of the front panel (701); and the battery (8) and the switch (9) are fixed to the rear side surface of the rear panel (702).
3. The experimental teaching aid for simulating the sundial to measure the sun's shadow according to claim 2, characterized in that: A power box (704) is fixed on the rear side of the rear panel (702), the switch (9) is fixed to one end of the power box (704), and the battery (8) is installed in the power box (704).
4. The experimental teaching aid for simulating the sundial to measure the sun's shadow according to claim 1, characterized in that: The horizontal base plate (4) is a rectangular plate, the slots (5) are located on the left and right sides of the rear of the horizontal base plate (4), and the direction mark (3) is located at the upper left corner or the upper right corner of the front of the horizontal base plate (4).
5. The experimental teaching aid for simulating the sundial to measure the sun's shadow according to claim 4, characterized in that: The direction mark (3) comprises a cross-shaped marking line indicating east, west, south and north, and the left, right, front and rear directions of the rectangular plate correspond to the west, east, north and south directions of the cross-shaped marking line respectively.
6. The experimental teaching aid for simulating the sundial to measure the sun's shadow according to claim 4, characterized in that: A rectangular frame-shaped alignment mark (12) for indicating the placement position of the horizontal guide plate (1) is also provided in the middle of the front part of the horizontal base plate (4); the alignment mark (12) is the same size and shape as the bottom surface of the horizontal guide plate (1); and the front-to-back center line of the alignment mark (12) is located in the symmetry plane of the semicircular arc track (6).
7. The experimental teaching aid for simulating the measurement of the sun's shadow by a gnomon according to any one of claims 1 to 6, characterized in that: The horizontal guide plate (1) and the horizontal base plate (4) are acrylic plates.