CN214068085U

CN214068085U - Probability theory and mathematical statistics principle demonstration device

Info

Publication number: CN214068085U
Application number: CN202022708948.6U
Authority: CN
Inventors: 韩丽; 陈思颖; 李周红; 张远; 白丽艳; 文萍
Original assignee: Yuxi Normal University
Current assignee: Yuxi Normal University
Priority date: 2020-11-21
Filing date: 2020-11-21
Publication date: 2021-08-27
Anticipated expiration: 2030-11-21

Abstract

The utility model provides a probability theory and mathematical statistics principle presentation device, includes the demonstration platform, the upper end of demonstration platform is provided with the component of accepting that is used for accepting the bobble, the upside of accepting the component is provided with the experiment component that is used for carrying out the experiment, the inside of demonstration platform is provided with the protection component of protecting whole device, the utility model discloses a motor drives the carousel and rotates and accept the bobble, thereby demonstrates the randomness of final result through bobble quantity and the colour of observing in the glass pipe, drives the bobble among the stirring rod stirring funnel through two motors for the dropping of bobble has more the randomness, guarantees the reliability of experiment, reduces the error that the motor vibrations produced whole experiment through installing at inside spring of demonstration platform and shock attenuation board, avoids external factor to influence the experimental result.

Description

Probability theory and mathematical statistics principle demonstration device

Technical Field

The utility model relates to a teaching experiment technical field specifically is a probability theory and mathematical statistics principle presentation device.

Background

Probability theory is the mathematical branch of studying the laws of the number of random phenomena. Random phenomena are relative to deterministic phenomena, and phenomena that necessarily lead to a certain result under certain conditions are called deterministic phenomena. The probability of an event is a measure of the likelihood that the event will occur. Although an event occurs by chance in a random experiment, random experiments in which a large number of repetitions can occur under the same conditions tend to exhibit a significant quantitative regularity.

At present, in probability theory teaching, in order to enable students to quickly master relevant knowledge, an auxiliary teaching mold is adopted.

The existing demonstration device often cannot completely ensure the randomness of test results when in use, so that the reliability of probability theory cannot be proved, and external interference factors cannot be discharged when in use, so that the results are not convincing enough, therefore, the probability theory and mathematical statistics principle demonstration device is provided at present.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a probability theory and mathematical statistics principle presentation device to solve the problem that proposes in the above-mentioned background art.

In order to realize the purpose, the probability theory and mathematical statistics principle demonstration device comprises a demonstration table, wherein a bearing component for bearing a small ball is arranged at the upper end of the demonstration table, an experimental component for experiment is arranged on the upper side of the bearing component, and a protection component for protecting the whole device is arranged in the demonstration table.

Preferably, it includes the carousel to accept the component, the demonstration bench upper end is connected with the shock attenuation board, the carousel is installed in the shock attenuation board upper end, the upper end of carousel is provided with a plurality of groups of bellmouths, and it has the glass pipe to peg graft on the bellmouth, the glass pipe lower extreme is seted up flutedly, the glass pipe passes through recess and bellmouth joint, demonstration bench internally mounted has motor one, the lower extreme center welding of shock attenuation board and carousel is passed to a motor upper end, drives the carousel through the motor and rotates, and then lets the bobble fall into the glass pipe at random, and the experiment conclusion is drawn to the bobble number of different colours in the accessible observation glass pipe, and glass pipe and bellmouth joint can be at any time according to the quantity of experiment demand adjustment glass pipe.

Preferably, the experiment component includes the support frame, the quantity of support frame has two sets ofly, and is two sets of the both sides at the carousel are installed respectively to the support frame, be provided with the motor bridge between the upper end of support frame, the inside motor that is provided with of motor bridge is two, two lower extremes of motor pass motor bridge lower extreme welding and have the rotary rod, the welding of rotary rod lower extreme has the stirring rod, be connected with the funnel between the support frame middle part, the funnel is installed under the rotary rod, drives the rotary rod through two motors of motor bridge inside and rotates, and then drives the bobble among the stirring rod stirring funnel for the bobble that falls is more random.

Preferably, the protection component includes the shock attenuation board, shock attenuation board sliding connection is in the demonstration bench upper end, the spring has all been welded to the lower extreme both sides of shock attenuation board, the quantity of spring has a plurality of groups, a plurality of groups the vibrations that the spring produced about the central line symmetrical arrangement of shock attenuation board through the spring absorption motor during operation avoid external factors to influence the experimental result, make the experimental result more reliable.

Preferably, the quantity of stirring rod has a plurality of groups, a plurality of groups the stirring rod is about rotary rod barycenter symmetrical arrangement, the material of stirring rod is the steel, chooses for use the hardness that the stirring rod can be strengthened as the material to the steel, prolongs the life of stirring rod.

Compared with the prior art, the beneficial effects of the utility model are that:

because glass pipe and tang joint, the installation of glass pipe is all comparatively simple and convenient with the dismantlement, so can be before the experiment begins according to the quantity of this experiment demand decision glass pipe, the vibrations that the welded spring can absorb the motor during operation production between demonstration platform and the shock attenuation board, avoid external factors to influence the experimental result, ensure the reliability of experimental result, the ball can be earlier through the stirring of stirring rod before the whereabouts for final experimental result is with having the randomness.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a side sectional view of the receiving member and the protecting member of the present invention;

fig. 3 is a side sectional view of the experimental member of the present invention.

In the figure: 1. a demonstration table; 2. a receiving member; 3. an experimental component; 4. a protective member; 5. A turntable; 6. a convex opening; 7. a groove; 8. a glass tube; 9. a first motor; 10. a support frame; 11. A motor bridge; 12. a second motor; 13. rotating the rod; 14. a stirring rod; 15. a funnel; 16. a damper plate; 17. a spring.

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. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, a probability theory and mathematical statistics principle demonstration device includes a demonstration table 1, a receiving member 2 for receiving a small ball is disposed at an upper end of the demonstration table 1, an experimental member 3 for performing an experiment is disposed at an upper side of the receiving member 2, and a protection member 4 for protecting the whole device is disposed inside the demonstration table 1.

Experiment component 3 includes support frame 10, the quantity of support frame 10 has two sets ofly, and is two sets of the both sides at carousel 5 are installed respectively to support frame 10, be provided with motor bridge 11 between the upper end of support frame 10, motor bridge 11 is inside to be provided with two 12 motors, two 12 lower extremes of motor pass motor bridge 11 lower extreme welding and have rotary rod 13, the welding of 13 lower extremes of rotary rod has stirring rod 14, be connected with funnel 15 between the support frame 10 middle part, funnel 15 is installed under rotary rod 13.

The two ends of the funnel 15 are welded in the middle of the support frame 10 through support rods, and the circle center of the discharge pipeline of the funnel 15 and the circle center of the rotary rod 13 are on the same plumb line.

In the scheme: before the experiment begins, the user drops into the bobble in funnel 15, open two 12 motors, two 12 motors drive rotary rod 13 and rotate, and then make stirring rod 14 stir the bobble, after the stirring is abundant, close two 12 motors, open one motor 9, one 9 motors drives the carousel 5 rotatory, make the bobble that falls from funnel 15 enter into glass pipe 8 at random, close one motor 9 after the experiment finishes, can observe the different colours in the glass pipe 8 bobble number and draw the conclusion of experiment, because the vibrations that the welded spring 17 can absorb the motor during operation production between demonstration platform 1 and the shock attenuation board 16, avoid external factor to influence the experimental result.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A probability theory and mathematical statistics principle presentation device comprises a presentation table (1), and is characterized in that: a receiving component (2) for receiving the small balls is arranged at the upper end of the demonstration table (1), an experimental component (3) for carrying out experiments is arranged on the upper side of the receiving component (2), and a protective component (4) for protecting the whole device is arranged in the demonstration table (1);

accept component (2) including carousel (5), demonstration platform (1) upper end is connected with shock attenuation board (16), install in shock attenuation board (16) upper end carousel (5), the upper end of carousel (5) is provided with a plurality of groups tang (6), and glass pipe (8) lower extreme is seted up fluted (7), glass pipe (8) are through recess (7) and tang (6) joint, demonstration platform (1) internally mounted has motor (9), the lower extreme center welding of shock attenuation board (16) and carousel (5) is passed to motor (9) upper end.

2. A probability theory and mathematical statistics principle demonstration apparatus according to claim 1, wherein: experiment component (3) are including support frame (10), the quantity of support frame (10) has two sets ofly, and is two sets of the both sides in carousel (5) are installed respectively in support frame (10), be provided with motor bridge (11) between the upper end of support frame (10), motor bridge (11) inside is provided with motor two (12), motor two (12) lower extreme passes motor bridge (11) lower extreme welding and has rotary rod (13), rotary rod (13) lower extreme welding has stirring rod (14), be connected with funnel (15) between support frame (10) middle part, install under rotary rod (13) funnel (15).

3. A probability theory and mathematical statistics principle demonstration apparatus according to claim 1, wherein: the protection component (4) includes shock attenuation board (16), shock attenuation board (16) sliding connection is in demonstration platform (1) upper end, spring (17) have all been welded to the lower extreme both sides of shock attenuation board (16), the quantity of spring (17) has a plurality of groups, a plurality of groups spring (17) are about the central line symmetrical arrangement of shock attenuation board (16).

4. A probability theory and mathematical statistics principle demonstration apparatus according to claim 2, wherein: the number of the stirring rods (14) is provided with a plurality of groups, the stirring rods (14) are symmetrically arranged about the center of mass of the rotating rod (13), and the stirring rods (14) are made of steel.