CN110148335B - High school physics free fall experiment analogue means - Google Patents
High school physics free fall experiment analogue means Download PDFInfo
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- CN110148335B CN110148335B CN201910442563.9A CN201910442563A CN110148335B CN 110148335 B CN110148335 B CN 110148335B CN 201910442563 A CN201910442563 A CN 201910442563A CN 110148335 B CN110148335 B CN 110148335B
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Abstract
The invention discloses a high school physics free fall experiment simulation device, and particularly relates to the technical field of physics teaching equipment. According to the invention, the heights of the adjusting transverse frame and the bearing plate are adjusted, so that the first experiment cylinder and the second experiment cylinder are slidably stretched, the falling height of the experiment ball is adjusted, the vacuum pump exhausts air to ensure that the interiors of the first experiment assembly and the second experiment assembly are vacuum, two experiment balls with different masses are simultaneously released from the same height, free fall experiment demonstration is carried out, the influence of external force is small, the experiment result is accurate, the experiment error is reduced, the contrast is distinct, and the relation between the mass and the acceleration is convenient to observe.
Description
Technical Field
The invention relates to the technical field of physical teaching equipment, in particular to a high school physics free fall experiment simulation device.
Background
In the teaching process of middle school physics, in order to enable students to understand acceleration data more intuitively, free fall simulation movement needs to be demonstrated for the students, and in the free fall experiment, special equipment is needed for supporting, but the traditional free fall experiment simulation device has many problems, the structure is complex, the use and regulation are inconvenient, the fixation is not firm enough, the balance is difficult to guarantee, the accuracy of simulation test is uncertain, and great troubles are brought to the use of users.
Chinese patent application publication No. CN 109461352A discloses a high school physics free falling body experiment simulation device, which comprises a bottom plate, wherein balance adjusting devices are arranged at four corners of the upper end of the bottom plate, the high school physics free falling body experiment simulation device is simple in structure, convenient to use and adjust, firm in fixation, accurate in simulation test, brings great convenience to users, can adjust the horizontal angle of a falling surface and a placing surface through the balance adjusting devices according to requirements, conveniently adjust the placing height through a lifting device, and facilitates the adjustment of different free falling heights to ensure the accuracy of experiment data through a plurality of groups of tests, facilitates the quick release of falling balls through a releasing device, detects the position information of the falling balls in real time through an infrared sensor and a pressure sensor, and completes a plurality of groups of free falling body experiments under the timing effect of a timer, the teaching burden of teachers is reduced, the simulation test accuracy is improved, and the service efficiency of the free fall experiment simulation device is improved.
But the high school physics free fall experiment analogue means that provides among the above-mentioned technical scheme still has more shortcoming when the in-service use, if lack the contrast group, is not convenient for audio-visually to observe the relation of free fall and quality, and the experimental result receives external force to influence greatly, leads to the experimental result to have great error, is unfavorable for teaching demonstration experiment.
Disclosure of Invention
In order to overcome the above defects in the prior art, embodiments of the present invention provide a high school physics free fall experiment simulation apparatus, which adjusts heights of an adjusting cross frame and a bearing plate to enable a first experiment cylinder and a second experiment cylinder to slide and stretch, adjusts a falling height of an experiment sphere, and evacuates air from a vacuum pump to enable interiors of a first experiment assembly and a second experiment assembly to be vacuum, so as to release two experiment spheres with different masses from the same height simultaneously to perform free fall experiment demonstration.
In order to achieve the purpose, the invention provides the following technical scheme: a high school physics free fall experiment simulation device comprises a fixed base, wherein a balance plate is arranged at the top of the fixed base, two symmetrically distributed support slide bars are arranged on two sides of the top of the fixed base, slide sleeves are slidably connected to the outer sides of the support slide bars, an adjusting cross frame is arranged between the two slide sleeves, two symmetrical mounting plates are fixedly connected to the top of the balance plate, buffering assemblies are arranged at the tops of the two mounting plates, a first experiment assembly and a second experiment assembly are respectively arranged on the outer sides of the two buffering assemblies, and vacuum pumps are arranged on one sides of the first experiment assembly and one side of the second experiment assembly;
the first experiment assembly and the second experiment assembly are composed of a first experiment cylinder and a second experiment cylinder, the first experiment cylinder penetrates through the top end of the second experiment cylinder, the first experiment cylinder is connected with the axis of the second experiment cylinder in a sliding mode, the top end of the first experiment cylinder is provided with a sealing plug, two sides of the sealing plug are connected with two adjusting rods which are distributed in parallel in a sliding mode, the bottom end of each adjusting rod is fixedly connected with a bearing plate, a falling hole penetrates through the axis of the bearing plate, a plurality of sliding grooves which are distributed uniformly are formed in the inner side of the falling hole, supporting pieces are connected in the sliding grooves in a sliding mode, and one end, away from the falling hole, of each supporting piece is provided with an electric push;
the buffer assembly comprises a buffer groove, a shielding boss is arranged on the outer side of the buffer groove, a buffer plate is connected in the buffer groove in a sliding mode, an arc-shaped groove is formed in the upper surface of the buffer plate, a plurality of buffer rods which are uniformly distributed are fixedly connected to the bottom of the buffer groove, the buffer rods penetrate through the buffer plate and are connected with the buffer plate in a sliding mode, and a first spring is sleeved on the outer side of each buffer rod;
a first experiment ball is arranged in the first experiment component, a second experiment ball is arranged in the second experiment component, the diameters of the first experiment ball and the second experiment ball are equal, the first experiment ball is made of stainless steel metal, and the second experiment ball is made of plastic;
sliding sleeve one side is equipped with first screw hole, first threaded hole is equipped with first set screw, the sliding sleeve passes through first set screw fixed connection with the support slide bar, thereby adjust the pole and pass the through hole in adjusting the crossbearer and realize vertical sliding connection, it is equipped with the second screw hole to adjust crossbearer one side, the threaded second that is equipped with second set screw, adjust the crossbearer and pass through second set screw with the regulation pole and realize side direction fixed connection.
In a preferred embodiment, a touch display screen is fixedly connected to one side of the fixed base, a single chip microcomputer is arranged at a connecting end of the touch display screen, and a timing module is arranged at a connecting end of the single chip microcomputer.
In a preferred embodiment, a through hole is formed in the axis of the arc-shaped groove, infrared sensors are fixedly connected in the through hole, the number of the timing modules is two, and the two timing modules are respectively matched with the two infrared sensors.
In a preferred embodiment, the surface of the supporting slide rod is provided with a first scale bar, and the surface of the second experimental cylinder is provided with a second scale bar.
In a preferred embodiment, the fixed base is fixedly connected with the sucker at the bottom, the balance rods are fixedly connected with the four corners of the top of the fixed base, the balance rods penetrate through the balance plate and are connected with the balance plate in a sliding mode, external threads are arranged at the top ends of the balance rods, nuts are connected to the top ends of the balance rods in a threaded mode, second springs are sleeved on the outer sides of the balance rods, and the second springs are arranged between the fixed base and the balance plate.
In a preferred embodiment, the top end of the first experiment cylinder is fixedly connected with the adjusting cross frame, the second experiment cylinder is fixedly connected with the balance plate, a sealing gasket is fixedly connected at the joint of the first experiment cylinder and the second experiment cylinder, and the input end of the vacuum pump is matched with one side of the bottom of the second experiment cylinder.
In a preferred embodiment, the first and second test cartridges are made of acrylic glass material, and the sealing gasket and sealing plug are made of rubber material.
In a preferred embodiment, the bottom end of the bearing plate is arc-shaped and matched with the arc-shaped groove, the cross-sectional shape of the falling hole is horn-shaped, and the first experiment ball and the second experiment ball are respectively arranged in the two falling holes.
In a preferred embodiment, an a/D converter is arranged at an input end of the single chip microcomputer, a D/a converter is arranged at an output end of the single chip microcomputer, the infrared sensor is electrically connected with the a/D converter, and the timing module is electrically connected with the D/a converter.
The invention has the technical effects and advantages that:
1. the height of the adjusting cross frame and the height of the bearing plate are adjusted, so that the first experiment cylinder and the second experiment cylinder are slidably stretched, the falling height of the experiment ball is adjusted, the vacuum pump exhausts air to enable the interiors of the first experiment assembly and the second experiment assembly to be vacuum, two experiment balls with different masses are released from the same height at the same time, free falling body experiment demonstration is performed, the influence of external force is small, the experiment result is accurate, the experiment error is reduced, the contrast is distinct, and the relation between the masses and the acceleration is convenient to observe;
2. the fixing base is installed on a platform through the sucker, the nut is screwed down to enable the second spring to be compressed tightly, the balance plate is horizontally placed according to the inclination angle of the platform, the free falling tracks of the first experiment ball and the second experiment ball are respectively overlapped with plumb lines of the first experiment ball and the second experiment ball, the stability is good, the error of the experiment result is small, the buffering component effectively buffers the release pressure of the two balls, the balls are prevented from popping out and striking the second experiment cylinder, the arc-shaped groove enables the balls to roll down to the circle center point of the second experiment cylinder, the installation of the balls is convenient, the structure of the device is;
3. through releasing first experiment ball and second experiment ball simultaneously, two timing modules time simultaneously when releasing, and two infrared sensor cooperation singlechip analysis processes to control timing module when falling to the ground and stop, the timing result shows at touch display screen, and the experiment contrast of being convenient for improves simulation experiment's timing precision.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is an overall left side view of the present invention.
FIG. 3 is a cross-sectional view of a first experimental set according to the present invention.
FIG. 4 is a schematic structural diagram of a buffer plate according to the present invention.
FIG. 5 is a top view of the carrier plate of the present invention.
FIG. 6 is an enlarged view of the portion A of FIG. 3 according to the present invention.
FIG. 7 is an enlarged view of the portion B of FIG. 3 according to the present invention.
Fig. 8 is a schematic structural diagram of a control system of the present invention.
The reference signs are: 1 fixed baseplate, 2 balance plates, 3 support slide bars, 4 sealing gaskets, 5 sliding sleeves, 6 adjusting crossbearers, 7 mounting plates, 8 buffering components, 81 buffering grooves, 82 shielding bosses, 83 buffering plates, 84 arc-shaped grooves, 85 buffering rods, 86 first springs, 9 first experiment components, 91 first experiment barrels, 92 second experiment barrels, 93 sealing plugs, 94 adjusting rods, 95 bearing plates, 96 dropping holes, 97 supporting plates, 98 electric push rods, 99 first experiment balls, 10 second experiment components, 11 vacuum pumps, 12 first fixing screws, 13 second fixing screws, 14 touch display screens, 15 single-chip microcomputers, 16 timing modules, 17 infrared sensors, 18 first scale strips, 19 second scale strips, 20 sucking discs, 21 balancing rods, 22 nuts and 23 second springs.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The high school physics free fall experiment simulation device shown in fig. 1-7 comprises a fixed base 1, wherein a balance plate 2 is arranged at the top of the fixed base 1, two support slide bars 3 which are symmetrically distributed are arranged on two sides of the top of the fixed base 1, slide sleeves 5 are slidably connected to the outer sides of the support slide bars 3, an adjusting transverse frame 6 is arranged between the two slide sleeves 5, two symmetrical mounting plates 7 are fixedly connected to the top of the balance plate 2, buffer assemblies 8 are arranged on the tops of the two mounting plates 7, a first experiment assembly 9 and a second experiment assembly 10 are respectively arranged on the outer sides of the two buffer assemblies 8, and a vacuum pump 11 is arranged on one side of each of the first experiment assembly 9 and the second experiment assembly 10;
the first experiment assembly 9 and the second experiment assembly 10 are both composed of a first experiment tube 91 and a second experiment tube 92, the first experiment tube 91 penetrates through the top end of the second experiment tube 92, the first experiment tube 91 is connected with the axis of the second experiment tube 92 in a sliding manner, the top end of the first experiment tube 91 is provided with a sealing plug 93, two sides of the sealing plug 93 are connected with two adjusting rods 94 which are distributed in parallel in a sliding manner, the bottom end of each adjusting rod 94 is fixedly connected with a bearing plate 95, the axis of the bearing plate 95 penetrates through a falling hole 96, a plurality of sliding grooves which are distributed uniformly are arranged on the inner side of the falling hole 96, supporting pieces 97 are connected in the sliding grooves in a sliding manner, and one ends, far away from the falling hole 96, of the supporting pieces 97 are provided with electric;
the buffer assembly 8 comprises a buffer groove 81, a shielding boss 82 is arranged on the outer side of the buffer groove 81, a buffer plate 83 is connected in the buffer groove 81 in a sliding mode, an arc-shaped groove 84 is formed in the upper surface of the buffer plate 83, a plurality of buffer rods 85 which are evenly distributed are fixedly connected to the bottom of the buffer groove 81, the buffer rods 85 penetrate through the buffer plate 83, the buffer rods 85 are connected with the buffer plate 83 in a sliding mode, and a first spring 86 is sleeved on the outer side of each buffer rod 85;
a first experiment ball 99 is arranged in the first experiment assembly 9, a second experiment ball is arranged in the second experiment assembly 10, the diameters of the first experiment ball 99 and the second experiment ball are equal, the first experiment ball 99 is made of stainless steel metal, and the second experiment ball is made of plastic;
a first threaded hole is formed in one side of the sliding sleeve 5, a first fixing screw 12 is arranged in the first threaded hole, the sliding sleeve 5 is fixedly connected with the supporting slide rod 3 through the first fixing screw 12, the adjusting rod 94 penetrates through a through hole in the adjusting transverse frame 6 to achieve vertical sliding connection, a second threaded hole is formed in one side of the adjusting transverse frame 6, a second fixing screw 13 is arranged in the second threaded hole, and the adjusting transverse frame 6 and the adjusting rod 94 are laterally fixedly connected through the second fixing screw 13;
the surface of the support slide bar 3 is provided with a first scale bar 18, and the surface of the second experiment barrel 92 is provided with a second scale bar 19;
the bottom of the fixed base 1 is fixedly connected with a sucker 20, four corners of the top of the fixed base 1 are fixedly connected with balance rods 21, the balance rods 21 penetrate through the balance plate 2, the balance rods 21 are connected with the balance plate 2 in a sliding mode, external threads are arranged at the top ends of the balance rods 21, nuts 22 are connected with the top ends of the balance rods 21 in a threaded mode, second springs 23 are sleeved on the outer sides of the balance rods 21, and the second springs 23 are arranged between the fixed base 1 and the balance plate 2;
the top end of the first experiment cylinder 91 is fixedly connected with the adjusting transverse frame 6, the second experiment cylinder 92 is fixedly connected with the balance plate 2, the joint of the first experiment cylinder 91 and the second experiment cylinder 92 is fixedly connected with the sealing washer 4, and the input end of the vacuum pump 11 is matched with one side of the bottom of the second experiment cylinder 92;
the first experiment cylinder 91 and the second experiment cylinder 92 are both made of acrylic glass materials, are firm, durable and convenient to clean, have high transparency and good visual effect, and the sealing washer 4 and the sealing plug 93 are both made of rubber materials;
the bottom end of the bearing plate 95 is arc-shaped, the bottom end of the bearing plate 95 is matched with the arc-shaped groove 84, the cross section of the falling hole 96 is horn-shaped, so that a first experimental ball 99 and a second experimental ball can conveniently enter the falling hole 96, and the first experimental ball 99 and the second experimental ball are respectively arranged in the two falling holes 96;
the implementation mode is specifically as follows: pushing down the bearing plate 95 to make the first experimental ball 99 and the second experimental ball enter two falling holes 96 respectively, starting the electric push rod 98 to make the output end extend, making the supporting sheet 97 extend and bear the first experimental ball 99 and the second experimental ball, sliding the sliding sleeve 5 outside the supporting slide bar 3, adjusting the height of the cross frame 6, adjusting the height of the bearing plate 95 by the sliding adjusting rod 94, and using the first fixing screw 12 and the second fixing screw 13 to fix the position respectively, evacuating the first experimental component 9 and the second experimental component 10 by the vacuum pump 11, and adjusting the height of the first experimental cylinder 91 and the second experimental cylinder 92, releasing the first experimental ball 99 and the second experimental ball from the same height inside the first experimental component 9 and the second experimental component 10 simultaneously, performing free falling body experiment demonstration, having distinct contrast, small influence by external force, more accurate experimental result, and convenient for observing the relation between quality and acceleration, the buffering component 8 effectively buffers the pressure released by the two spheres, the spheres are prevented from popping up and striking the second experiment barrel 92, and the arc-shaped groove 84 enables the spheres to roll down to the center points of the spheres, so that the installation of the spheres is facilitated.
According to the high school physics free fall experiment simulation device shown in fig. 1-8, one side of the fixed base 1 is fixedly connected with a touch display screen 14, a single chip microcomputer 15 is arranged at the connecting end of the touch display screen 14, and a timing module 16 is arranged at the connecting end of the single chip microcomputer 15;
a through hole is formed in the axis of the arc-shaped groove 84, the infrared sensors 17 are fixedly connected in the through hole, the number of the timing modules 16 is two, and the two timing modules 16 are respectively matched with the two infrared sensors 17;
the model of the infrared sensor 17 is GP2Y0A51SK0F, the model of the single chip microcomputer 15 is M68HC16, the model of the vacuum pump 11 is ZX512-503-2900, and the model of the electric push rod 98 is JF-TGA-50;
the implementation mode is specifically as follows: assign the start command through touch display screen 14 and give singlechip 15, make it control electric putter 98 output and retract fast, pulling support sheet 97 retracts to the spout in, the clear first experiment ball 99 of messenger and second experiment ball of the 96 bottom spaces that fall drop, two timing module 16 are timed simultaneously this moment, two infrared sensor 17 sense the distance of first experiment ball 99 and second experiment ball and arc recess 84 bottom respectively, and with apart from information transmission singlechip 15 analysis processes, when the distance detects for 0, singlechip 15 control timing module 16 stops the timing, and show the timing result of two timing module 16 at touch display screen 14, the experiment contrast of being convenient for, improve the timing precision of simulation experiment.
The working principle of the invention is as follows:
referring to the attached drawings 1-7 of the specification, the heights of the adjusting transverse frame 6 and the bearing plate 95 are adjusted, the heights of the first experiment cylinder 91 and the second experiment cylinder 92 are adjusted, the heights of the experiment spheres are determined and adjusted through the reading difference between the first scale bar 18 and the second scale bar 19, the vacuum pump 11 pumps air to enable the interiors of the first experiment assembly 9 and the second experiment assembly 10 to be vacuum, the first experiment sphere 99 and the second experiment sphere are released from the interiors of the first experiment assembly 9 and the second experiment assembly 10 at the same height, free falling experiment demonstration is carried out, two sphere phenomena are compared, and the relation between the mass and the acceleration is observed;
referring to the attached drawings 3-7 of the specification, the fixed base 1 is installed on a platform by using the sucker 20, the second spring 23 is tightly pressed by screwing the nut 22, the balance plate 2 is horizontally placed according to the inclination angle of the platform, the buffer assembly 8 effectively buffers the pressure released by two spheres, the spheres are prevented from popping and striking the second experimental cylinder 92, and the arc-shaped groove 84 enables the spheres to roll down to the center point of the circle;
referring to the attached figures 1-8 of the specification, by releasing the first experiment ball 99 and the second experiment ball at the same time, when the two timing modules 16 are released, the two infrared sensors 17 are matched with the single chip microcomputer 15 to perform analysis and processing, and when the vehicle lands on the ground, the timing modules 16 are controlled to stop, and the timing result is displayed on the touch display screen 14.
The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;
secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the invention, only the structures related to the disclosed embodiments are referred to, other structures can refer to common designs, and the same embodiment and different embodiments of the invention can be combined with each other without conflict;
and finally: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.
Claims (5)
1. The utility model provides a high school physics free fall experiment analogue means, includes fixed baseplate (1), its characterized in that: the balance plate (2) is arranged at the top of the fixed base (1), two symmetrically distributed support slide bars (3) are arranged on two sides of the top of the fixed base (1), slide sleeves (5) are slidably connected to the outer sides of the support slide bars (3), an adjusting cross frame (6) is arranged between the two slide sleeves (5), two symmetrical mounting plates (7) are fixedly connected to the top of the balance plate (2), buffer assemblies (8) are arranged at the tops of the two mounting plates (7), a first experiment assembly (9) and a second experiment assembly (10) are respectively arranged on the outer sides of the two buffer assemblies (8), and vacuum pumps (11) are respectively arranged on one sides of the first experiment assembly (9) and the second experiment assembly (10);
the first experiment assembly (9) and the second experiment assembly (10) are composed of a first experiment cylinder (91) and a second experiment cylinder (92), the first experiment cylinder (91) penetrates through the top end of the second experiment cylinder (92), the first experiment cylinder (91) is in sliding connection with the axis of the second experiment cylinder (92), a sealing plug (93) is arranged at the top end of the first experiment cylinder (91), two sides of the sealing plug (93) are in sliding connection with two adjusting rods (94) which are distributed in parallel, the bottom end of each adjusting rod (94) is fixedly connected with a bearing plate (95), a falling hole (96) penetrates through the axis of the bearing plate (95), a plurality of sliding grooves which are uniformly distributed are formed in the inner side of the falling hole (96), supporting sheets (97) are in sliding connection with the sliding grooves, and an electric push rod (98) is arranged at one end, far away from the falling hole (96), of each supporting sheet (97);
the buffer assembly (8) comprises a buffer tank (81), a shielding boss (82) is arranged on the outer side of the buffer tank (81), a buffer plate (83) is connected in the buffer tank (81) in a sliding mode, an arc-shaped groove (84) is formed in the upper surface of the buffer plate (83), a plurality of buffer rods (85) which are uniformly distributed are fixedly connected to the bottom of the buffer tank (81), the buffer rods (85) penetrate through the buffer plate (83), the buffer rods (85) are connected with the buffer plate (83) in a sliding mode, and first springs (86) are sleeved on the outer side of the buffer rods (85);
a first experiment ball (99) is arranged in the first experiment assembly (9), a second experiment ball is arranged in the second experiment assembly (10), the diameters of the first experiment ball (99) and the second experiment ball are equal, the first experiment ball (99) is made of stainless steel metal, and the second experiment ball is made of plastic;
a first threaded hole is formed in one side of the sliding sleeve (5), a first fixing screw (12) is arranged in the first threaded hole, the sliding sleeve (5) is fixedly connected with the supporting sliding rod (3) through the first fixing screw (12), the adjusting rod (94) penetrates through a through hole in the adjusting transverse frame (6) to achieve vertical sliding connection, a second threaded hole is formed in one side of the adjusting transverse frame (6), a second fixing screw (13) is arranged in the second threaded hole, and the adjusting transverse frame (6) is fixedly connected with the adjusting rod (94) in a lateral direction through the second fixing screw (13);
a touch display screen (14) is fixedly connected to one side of the fixed base (1), a single chip microcomputer (15) is arranged at the connecting end of the touch display screen (14), and a timing module (16) is arranged at the connecting end of the single chip microcomputer (15);
a through hole is formed in the axis of the arc-shaped groove (84), infrared sensors (17) are fixedly connected in the through hole, the number of the timing modules (16) is two, and the two timing modules (16) are respectively matched with the two infrared sensors (17);
a first scale bar (18) is arranged on the surface of the supporting slide bar (3), and a second scale bar (19) is arranged on the surface of the second experiment barrel (92);
first experiment section of thick bamboo (91) top and regulation crossbearer (6) fixed connection, second experiment section of thick bamboo (92) and balance plate (2) fixed connection, the junction fixedly connected with seal ring (4) of first experiment section of thick bamboo (91) and second experiment section of thick bamboo (92), the input and the second experiment section of thick bamboo (92) bottom one side phase-match of vacuum pump (11).
2. The high school physics free fall experiment simulation device of claim 1, characterized in that: fixed baseplate (1) bottom fixedly connected with sucking disc (20), the equal fixedly connected with balancing beam (21) in fixed baseplate (1) top four corners, balancing beam (21) runs through balance plate (2), and balancing beam (21) and balance plate (2) sliding connection, balancing beam (21) top is equipped with the external screw thread, balancing beam (21) top threaded connection has nut (22), balancing beam (21) outside cover is equipped with second spring (23), second spring (23) set up between fixed baseplate (1) and balance plate (2).
3. The high school physics free fall experiment simulation device of claim 1, characterized in that: the first experiment barrel (91) and the second experiment barrel (92) are both made of acrylic glass materials, and the sealing washer (4) and the sealing plug (93) are both made of rubber materials.
4. The high school physics free fall experiment simulation device of claim 1, characterized in that: the bottom end of the bearing plate (95) is arc-shaped, the bottom end of the bearing plate (95) is matched with the arc-shaped groove (84), the cross section of the falling hole (96) is horn-shaped, and the first experiment ball (99) and the second experiment ball are arranged in the two falling holes (96) respectively.
5. The high school physics free fall experiment simulation device of claim 1, characterized in that: the input end of the single chip microcomputer (15) is provided with an A/D converter, the output end of the single chip microcomputer (15) is provided with a D/A converter, the infrared sensor (17) is electrically connected with the A/D converter, and the timing module (16) is electrically connected with the D/A converter.
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| CN108269467A (en) * | 2018-03-14 | 2018-07-10 | 方浩然 | A kind of experiment with falling objects apparatus for demonstrating |
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| CN109461352A (en) * | 2018-12-21 | 2019-03-12 | 刘家铮 | A kind of high school physics experiment with falling objects simulator |
| CN208903509U (en) * | 2018-04-04 | 2019-05-24 | 曾玉慈 | A kind of senior middle school's experiment with falling objects teaching equipment |
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| CN207529561U (en) * | 2017-06-29 | 2018-06-22 | 赵梦珍 | A kind of student physics free fall experimental device |
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| CN207731516U (en) * | 2017-11-01 | 2018-08-14 | 苏畅 | A kind of free fall experimental device |
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| CN109461352A (en) * | 2018-12-21 | 2019-03-12 | 刘家铮 | A kind of high school physics experiment with falling objects simulator |
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