CN214847343U

CN214847343U - Circular motion law quantitative exploration device

Info

Publication number: CN214847343U
Application number: CN202120219865.2U
Authority: CN
Inventors: 陈剑峰
Original assignee: Putian No 2 Middle School; Fujian Education Equipment And Infrastructure Center
Current assignee: Putian No 2 Middle School; Fujian Education Equipment And Infrastructure Center
Priority date: 2021-01-26
Filing date: 2021-01-26
Publication date: 2021-11-23
Anticipated expiration: 2031-01-26

Abstract

The utility model discloses a device is probed into to circular motion law ration relates to educational apparatus technical field. This device is probed into to circular motion law ration, including the box, the top fixedly connected with glass board of box, the last inner wall fixedly connected with gear motor of box, and gear motor's output shaft extends to the inside and the fixedly connected with carousel of glass board. The device for quantitatively exploring the circular motion law can accurately acquire data by using the photoelectric gate sensor, indirectly measure angular velocity and linear velocity, quantitatively explore the relation between the linear velocity and the angular velocity and the radius by experimental means, use the speed reduction motor as a drive to control the angular velocity to be constant, accurately acquire centripetal force, the angular velocity, the radius and the mass, quantitatively explore the influence factors of the centripetal force, acquire centripetal acceleration values under different angular velocities and different radii by using the DIS acceleration sensor, and quantitatively explore the relation between the centripetal acceleration and the angular velocity and the radius by experimental means.

Description

Circular motion law quantitative exploration device

Technical Field

The utility model relates to an educational equipment technical field specifically is a device is probed into to circular motion law ration.

Background

For a long time, the high school physics in China researches the content of the influence factors of the centripetal force, a traditional centripetal force demonstration instrument is continuously used, when a rotating arm rotates, a steel ball on the rotating arm generates a centrifugal phenomenon and moves along the radius direction, the radius value and the power arm value are changed, the measured centripetal force has deviation, the demonstration instrument rotates by hand, the rotating speed is unstable, the structure is not visual, the safety is poor, the steel ball frequently flies out during rotation and is dangerous, only the size of the centripetal force can be visually observed, the error is large, the influence factors of the centripetal force are roughly verified by using a conical pendulum, the small ball can hardly make circular motion along a certain circle on paper in the operation process, most of the pendulum balls do elliptic motion, when the pendulum ball does circular motion, the pendulum ball has a certain distance from the paper surface, and the pendulum ball cannot be determined to make circular motion along which circle, the measured radius error is large, the length of the center of the pendulum ball in the conical pendulum from a fixed point is difficult to determine, and the data error of height measurement is large.

SUMMERY OF THE UTILITY MODEL

The utility model provides a device is probed into to circular motion law ration comprises box and the carousel that has control gear motor speed circuit, and scale and fixed bolster are taken to the carousel, can fix micro-force transducer, photoelectric door sensor, fender polished rod and acceleration sensor etc. and the device is furnished with the weight cover, utilizes the scale on the carousel can be fast the radius that the accurate measurement weight center was located.

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: the utility model provides a device is probed into to circular motion law ration, the power distribution box comprises a box body, the top fixedly connected with glass board of box, the last inner wall fixedly connected with gear motor of box, and gear motor's output shaft extends to the inside and the fixedly connected with carousel of glass board, the little force transducer of top fixedly connected with of carousel, the top of carousel is close to two A-frame supports of right side fixedly connected with, and fixed mounting has the horizontal pole between two A-frame supports, the one end and the little force transducer fixed connection of horizontal pole, and the sliding surface cover of horizontal pole is equipped with the weight, the surperficial fixedly connected with weight cover in both sides about the weight, the top of carousel is close to left side fixedly connected with and keeps off polished rod and acceleration sensor, and the light blocking rod is located acceleration sensor's left side.

Furthermore, the top surface of the glass plate is provided with a sliding chute, and the inside of the sliding chute is connected with a photoelectric door sensor in a sliding manner.

Further, the upper inner wall of the box body is fixedly connected with a transformer, and the right inner wall of the box body is fixedly provided with a speed regulator.

Further, the speed regulator is provided with speed governing knob, shift knob and voltmeter through the wire, the speed regulator passes through the wire and respectively with gear motor and transformer electric connection.

Furthermore, the top surface of carousel is carved with the cross scale, and a plurality of spacing grooves have evenly been seted up at the top of carousel.

Furthermore, a center hole is formed in the center of the top of the weight, and a side lock screw hole is formed in the outer surface of the left side of the weight.

Further, the weight cover comprises locating lever, gear, baffle and base, the front surface sliding connection of base has two baffles, the front surface fixed connection of base has two locating levers, and the front surface of base rotates and is connected with the gear, two the inner wall of baffle all is connected with gear engagement, and the inside of two baffles respectively with two locating levers sliding connection.

The utility model provides a device is probed into to circular motion law ration. The method has the following beneficial effects:

the device for quantitatively exploring the circular motion law can accurately acquire data by using the photoelectric gate sensor, indirectly measure the angular rate omega and the linear velocity v, quantitatively explore the relationship between the linear velocity v and the angular rate omega as well as the relationship between the linear velocity v and the radius r by an experimental means, and obtain a proportionality coefficient in a conclusion through data processing.

The device for quantitatively exploring the circular motion law utilizes a speed reduction motor as a drive, controls the angular speed to be constant, accurately acquires the centripetal force F, the angular speed omega, the radius r and the mass m, quantitatively explores the influence factors of the centripetal force and obtains the proportional coefficient in the centripetal force formula through data processing.

The device for quantitatively exploring the circular motion law utilizes the DIS acceleration sensor to acquire centripetal acceleration values under different angular rates omega and different radiuses r, quantitatively explores the relation between the centripetal acceleration and the angular rates omega and the radiuses r through an experimental means, and obtains a proportionality coefficient in a centripetal acceleration exploration conclusion through data processing.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a top view of the turntable of the present invention;

FIG. 3 is a top view of the glass sheet of the present invention;

fig. 4 is a top view of the weight sleeve of the present invention.

In the figure: 1. a glass plate; 2. a polish rod is blocked; 3. a box body; 4. a photogate sensor; 5. a chute; 6. an acceleration sensor; 7. a turntable; 8. a micro-force sensor; 9. a cross bar; 10. a weight; 11. a triangular bracket; 12. a weight sleeve; 121. positioning a rod; 122. a gear; 123. a baffle plate; 124. a base; 13. a speed regulation knob; 14. a switch button; 15. a reduction motor; 16. a transformer; 17. a speed regulator; 18. a voltmeter.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

Referring to fig. 1-4, the present invention provides a technical solution: the utility model provides a device is probed into to circular motion law ration, the power distribution box comprises a box body 3, the top fixedly connected with glass board 1 of box 3, the last inner wall fixedly connected with gear motor 15 of box 3, and gear motor 15's output shaft extends to glass board 1's inside and fixedly connected with carousel 7, the little force sensor 8 of top fixedly connected with of carousel 7, two A-frame supports 11 of right side fixedly connected with are close to on the top of carousel 7, and fixed mounting has horizontal pole 9 between two A-frame supports 11, the one end and the little force sensor 8 fixed connection of horizontal pole 9, and the slip surface cover of horizontal pole 9 is equipped with weight 10, weight 10's the left and right sides fixed surface is connected with weight cover 12, the top of carousel 7 is close to left side fixedly connected with and keeps off polished rod 2 and acceleration sensor 6, and the pole 2 that is in the light is located acceleration sensor 6's left side.

In this embodiment: the glass plate 1 is fixed through the box body 3, the speed reducing motor 15 is fixed below the upper panel of the box body 3, the type of the speed reducing motor 15 can adopt TAKANAWA7, the speed reducing motor 15 works to provide drive for the device, the speed reducing motor 15 works to drive the rotary table 7 to rotate, two triangular supports 11 are installed on the other side of the top of the rotary table 7, triangular corners of the triangular supports 11 are provided with grooves and used for erecting a cross rod 9 penetrating through the center of a weight 10, so that the weight 10 can slide on the surface of the cross rod 9 under the influence of centripetal force, a weight sleeve 12 is designed to quickly and accurately measure the radius value of the center of the weight 10, a micro-force sensor 8 can be used for measuring the relation between the centripetal force and the angular velocity, the radius and the mass, the light blocking rod 2 is a cylinder with the diameter of 1.2cm, the acceleration sensor 6 can be used for collecting centripetal quantitative acceleration values under different angular velocities and different radiuses, and the centripetal acceleration and the angular velocity and the centripetal quantitative acceleration and the mass are researched through experimental means, And (4) obtaining a proportionality coefficient in a centripetal acceleration exploration conclusion through data processing.

Specifically, the top surface of the glass plate 1 is provided with a sliding groove 5, and the sliding groove 5 is connected with a photoelectric door sensor 4 in a sliding manner.

In this embodiment: the spout 5 of 5mm width is taken to the top of glass sheet 1, and spout 5 can change the position of photogate sensor 4 at will, utilizes photogate sensor 4, and accurate measurement cycle T, according to 2 pi/T indirect measurement angular velocity value is become to omega, utilizes photogate sensor 4 accurate measurement time of being in the light simultaneously.

Specifically, the upper inner wall of the box 3 is fixedly connected with a transformer 16, and the right inner wall of the box 3 is fixedly provided with a speed regulator 17.

In this embodiment: the transformer 16 is fixed through the box 3, so that current can be converted into voltage adaptive to each device for power supply, and the speed regulator 17 is designed into a stepless speed regulating circuit by a PWM stepless speed regulating plate and can be used for controlling the angular speed (linear speed).

Specifically, the speed regulator 17 is provided with a speed regulating knob 13, a switch button 14 and a voltmeter 18 through a lead, and the speed regulator 17 is electrically connected with the speed reducing motor 15 and the transformer 16 through leads respectively.

In this embodiment: a digital display voltmeter 18 is installed to facilitate coarse adjustment of angular velocity, and the speed regulator 17 is electrically connected with the speed reducing motor 15 and the transformer 16 through leads.

Specifically, the top surface of carousel 7 is carved with the cross scale, and a plurality of spacing grooves have evenly been seted up at the top of carousel 7.

In this embodiment: the cross scale can quickly and accurately measure the radius of the center of the weight 10, and the limiting groove is used for fixing the light blocking rod 2, the acceleration sensor 6 and the micro-force sensor 8.

Specifically, the top center position of weight 10 has seted up the centre bore, and the left side surface of weight 10 has seted up the side lock screw.

In this embodiment: the center hole is convenient to be used as a reference point for reading the scale of the position of the weight 10, and the side lock screw hole enables the cross rod 9 to penetrate through the center of the weight 10.

Specifically, weight sleeve 12 comprises locating lever 121, gear 122, baffle 123 and base 124, and the front surface sliding connection of base 124 has two baffles 123, and the front surface fixed connection of base 124 has two locating levers 121, and the front surface of base 124 rotates and is connected with gear 122, and the inner wall of two baffles 123 all is connected with the gear 122 meshing, and the inside of two baffles 123 respectively with two locating levers 121 sliding connection.

In this embodiment: move the baffle 123 of both sides on base 124, conveniently adjust both intervals, inject the position of baffle 123 through locating lever 121, during the adjustment, two baffles 123 can drive gear 122 and rotate to make two baffles 123 carry out the equidistance and remove, the weight 10 that is applicable to different thickness is fixed, makes the position of weight 10 be in the intermediate position all the time, ensures the data accuracy.

When the device is used, the experimental device is assembled, the light blocking rod 2 is fixed at the position of 24cm on the rotary table 7, the position of the photoelectric door sensor 4 is adjusted, the light blocking rod 2 is just at the central position of the U shape of the light blocking rod, a switch of the photoelectric door sensor 4 is turned off, a main circuit switch button 14 on the box body 3 is turned off, the speed reduction motor 15 is started, the rotary table 7 starts to rotate, the speed regulation knob 13 is adjusted, the rotating speed of the rotary table 7 is reduced, after the rotary table 7 is stabilized, data of linear velocity v, angular velocity omega and radius r are recorded, the speed regulation knob 13 on the box body 3 is adjusted, the rotating speed of the rotary table 7 is slightly increased, the data of the linear velocity v, the angular velocity omega and the radius r are recorded in a single click mode after stabilization, the numerical value of the voltmeter 18 is observed, the angular velocity is changed by adjusting the speed regulation knob 13 for multiple times, multiple groups of data are collected, and are exported and stored.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a circular motion law quantitative exploration device, includes box (3), its characterized in that: the glass plate (1) is fixedly connected to the top end of the box body (3), the speed reducing motor (15) is fixedly connected to the upper inner wall of the box body (3), an output shaft of the speed reducing motor (15) extends to the inside of the glass plate (1) and is fixedly connected with the turntable (7), the micro-force sensor (8) is fixedly connected to the top end of the turntable (7), the top end of the turntable (7) is close to the two triangular supports (11) fixedly connected to the right side, a cross rod (9) is fixedly installed between the two triangular supports (11), one end of the cross rod (9) is fixedly connected with the micro-force sensor (8), a weight (10) is sleeved on the surface of the cross rod (9) in a sliding mode, weight sleeves (12) are fixedly connected to the left side and the right side of the weight (10), and the top end of the turntable (7) is close to the left side fixedly connected with the polish blocking rod (2) and the acceleration sensor (6), and the light blocking rod (2) is positioned on the left side of the acceleration sensor (6).

2. The device for quantitatively exploring a circular motion law according to claim 1, wherein: the glass plate is characterized in that a sliding chute (5) is formed in the top surface of the glass plate (1), and a photoelectric door sensor (4) is connected to the inside of the sliding chute (5) in a sliding mode.

3. The device for quantitatively exploring a circular motion law according to claim 2, wherein: the upper inner wall of the box body (3) is fixedly connected with a transformer (16), and the right inner wall of the box body (3) is fixedly provided with a speed regulator (17).

4. The device for quantitatively exploring a circular motion law according to claim 3, wherein: the speed regulator (17) is provided with a speed regulating knob (13), a switch button (14) and a voltmeter (18) through leads, and the speed regulator (17) is respectively electrically connected with the speed reducing motor (15) and the transformer (16) through leads.

5. The device for quantitatively exploring a circular motion law according to claim 4, wherein: the top surface of carousel (7) is carved with the cross scale, and a plurality of spacing grooves have evenly been seted up at the top of carousel (7).

6. The device for quantitatively exploring a circular motion law according to claim 5, wherein: the top center position of weight (10) has seted up the centre bore, and the left side surface of weight (10) has seted up the side lock screw.

7. The device for quantitatively exploring a circular motion law according to claim 6, wherein: weight cover (12) comprise locating lever (121), gear (122), baffle (123) and base (124), the front surface sliding connection of base (124) has two baffles (123), the front surface fixed connection of base (124) has two locating levers (121), and the front surface rotation of base (124) is connected with gear (122), two the inner wall of baffle (123) all is connected with gear (122) meshing, and the inside of two baffles (123) respectively with two locating levers (121) sliding connection.