CN110853464A

CN110853464A - Mathematical probability demonstration model

Info

Publication number: CN110853464A
Application number: CN201911247042.4A
Authority: CN
Inventors: 周宏宪; 袁雅婧; 张营奎
Original assignee: Xuchang University
Current assignee: Xuchang University
Priority date: 2019-12-09
Filing date: 2019-12-09
Publication date: 2020-02-28
Anticipated expiration: 2039-12-09
Also published as: CN110853464B

Abstract

The invention discloses a mathematical probability demonstration model which comprises a base, wherein a support is fixed on the base, a hollow shell is fixed on the support, a ball body is arranged in the hollow shell, a rotating fan is arranged in the hollow shell, the hollow shell is respectively connected with a ball inlet pipe and a ball outlet pipe, the ball inlet pipe and the ball outlet pipe are connected through a number display pipe, through holes are respectively formed in the joints of the hollow shell and the ball inlet pipe and the ball outlet pipe, the height of the joint of the number display pipe and the ball outlet pipe is lower than that of the joint of the ball inlet pipe and the number display pipe, a plurality of identifiers are arranged in the number display pipe, and a recorder for recording numbers for a user, a first display screen for displaying the number of times of the recorded numbers and a second display screen for displaying the frequency of the recorded numbers are arranged on the base. The invention picks a certain amount of numbers randomly, compares the numbers with the numbers set by the corresponding players, repeatedly executes the steps, obtains the result through statistics, and calculates the winning frequency of the current lottery ticket in real time according to the result of the statistics.

Description

Mathematical probability demonstration model

Technical Field

The invention relates to the technical field of demonstration models, in particular to a mathematical probability demonstration model.

Background

Probability, also called probability, chance rate, probability or likelihood, is the basic concept of probability theory. Probability is a measure of the likelihood of a random event occurring and generally represents the magnitude of the likelihood of an event occurring in a real number between 0 and 1. The closer to 1, the more likely the event is to occur; the closer to 0, the less likely the event is to occur. What is more, how many percent of people have to be able to pass this test, what is the probability that a certain event will occur, is an example of probability.

In real life, a lottery is an improved event, and the playing method of the lottery is that a player selects a string of a certain number of numbers, then randomly lottery for the number of numbers, when the lottery number is consistent with the number lottery by the player, the player is considered to win, and if the lottery number is not consistent with the number lottery by the player, the player is considered to lose the prize.

In this regard, many experts and scholars have studied to calculate the probability of winning a lottery ticket, but all of them are only operated theoretically and have no practical support. Therefore, providing a mathematical probability demonstration model is a necessary issue for the probability study.

Disclosure of Invention

The present invention has been made to overcome the above-mentioned problems occurring in the prior art, and an object of the present invention is to provide a mathematical probability demonstration model which repeatedly performs a certain number by randomly drawing the number and comparing the number with the number set by the corresponding player, and obtains a result by counting, and calculates the winning frequency of the current lottery ticket in real time according to the result of the counting.

The invention provides a mathematical probability demonstration model, which comprises a base, wherein a support is fixed on the base, a hollow shell is fixed at the top of the support, a plurality of spheres with numbers marked on the surfaces are arranged in the hollow shell, a rotary fan used for enabling the spheres to do irregular motion is arranged in the hollow shell, the left side and the right side of the lower end of the hollow shell are respectively connected with a sphere inlet pipe and a sphere outlet pipe, the free ends of the sphere inlet pipe and the sphere outlet pipe are connected through a number display pipe, the inner surfaces and the outer surfaces of the sphere inlet pipe, the number display pipe and the number display pipe are smooth and continuous, through holes used for passing through the spheres are respectively arranged at the joints of the hollow shell and the sphere inlet pipe and the sphere outlet pipe, the edge of the through hole corresponding to the sphere inlet pipe is provided with a sphere inlet automatic door used for closing and opening the through holes and a first detector used for recording the number of the spheres passing through the spheres, the edge of the through-hole that goes out the bulb and correspond is equipped with the play ball automatically-controlled door that is used for sealing and opening the through-hole and is used for the record to pass through the second detector of spheroidal number, the height that shows the bulb and go out the bulb junction is less than go into the height of bulb and show the bulb junction, be equipped with a plurality ofly in the show the number of being used for detecting the digital recognizer in spheroid surface, the quantity of recognizer equals and the position one-to-one with the spheroidal number that can hold in the show the number of tubes, the show the bulb is equipped with to be used for with the junction that goes into the bulb to the through-hole department that goes out the bulb correspondence and is used for pushing the spheroid to the pushing mechanism in the hollow shell, be equipped with on the base and be used for providing the user and type the ware of typeeing digit, be used for showing the first display screen of the number of times that typeeing digit appears and be used for showing the second display screen of the frequency that type, the central processing unit is respectively in signal connection with the rotating fan, the ball inlet automatic door, the ball outlet automatic door, the first detector, the second detector, the recognizer, the pushing mechanism, the input device, the first display screen and the second display screen, and the power supply device is respectively in electric connection with the central processing unit, the rotating fan, the ball inlet automatic door, the ball outlet automatic door, the first detector, the second detector, the recognizer, the pushing mechanism, the input device, the first display screen and the second display screen.

Further, pushing mechanism is including seting up along length direction respectively the spout of display number pipe and play bulb bottom, the spout of display number pipe is connected with the spout of play bulb and the junction surface is level and smooth continuous, sliding fit is connected with the slider on the spout, and the higher authority of slider is equipped with the riser, and the upper surface of riser is not in when minimum state is not exceeded the notch of spout, the upper surface contactless of riser in the maximum state the display number pipe of spout or the pipe wall of play bulb, the slider drives through actuating mechanism, central processing unit with actuating mechanism signal connection, power supply unit with the actuating mechanism electricity is connected.

Further, actuating mechanism includes follows the width direction of slider sets up the recess of slider bottom is equipped with the pivot that can be at the recess internal rotation along the length direction of recess in the recess, the one end of pivot and the output shaft of first motor, and first motor is fixed on the cell wall of recess one side, the other end of pivot passes through the bearing and connects on the cell wall of recess opposite side, the pivot axle body has the gear through the key-type connection, and wheel and rack toothing, the rack is established the tank bottom of spout, central processing unit with first motor signal connection, power supply unit with first motor electricity is connected.

Furthermore, the quantity of recess has a plurality ofly, and a plurality of recesses are followed respectively the even distribution of width direction of slider, the quantity and the position of pivot, first motor, gear and rack all with the quantity and the position one-to-one of recess.

Further, an RFID electronic tag with a working frequency band of 13.56M is arranged in the ball body, the RFID electronic tag is used for storing a number consistent with the number marked on the surface of the ball body, and the identifier is an RFID reader used for identifying the RFID electronic tag.

Further, the hollow shell is spherical in shape.

Further, a through hole for enabling a user to observe the numbers marked on the surface of the sphere is arranged in front of the number display tube, and transparent glass is arranged on the through hole.

Furthermore, the rotary fan is fixed at the bottom of the hollow shell and comprises a second motor fixed at the bottom of the hollow shell, an output shaft of the second motor is connected with a plurality of rotary blades, each rotary blade is fixedly provided with an air blower, the central processing unit is respectively in signal connection with the second motor and the air blower, and the power supply device is respectively electrically connected with the second motor and the air blower.

Furthermore, the central processing unit is in signal connection with a remote terminal, and the remote terminal is used for receiving and displaying the data displayed by the first display screen and the second display screen and sent by the central processing unit.

The mathematical probability demonstration model provided by the invention has the following beneficial effects:

1. repeatedly executing the step by randomly drawing a certain amount of numbers and comparing the numbers with the numbers set by the corresponding players, obtaining the result through statistics, and calculating the winning frequency of the current lottery ticket in real time according to the result of the statistics;

2. the stored numbers in the ball body are identified through the RFID, so that the method is more accurate compared with the traditional method for detecting the numbers on the surface of the ball body through image identification, and meanwhile, the identification speed is higher;

3. the transparent glass is arranged on the display tube, so that the player can visually see the numbers on the shaken ball.

Drawings

FIG. 1 is a schematic diagram of an overall structure of a mathematical probability demonstration model provided by the present invention;

FIG. 2 is a schematic structural sectional view of a display tube of a mathematical probability demonstration model along a length direction according to the present invention;

fig. 3 is a schematic structural sectional view of a display tube of a mathematical probability demonstration model along a width direction.

Description of reference numerals:

1. a hollow shell; 2. a first detector; 3. an automatic ball-entering door; 4. a ball inlet pipe; 5. rotating a fan; 6. a digital display tube; 7. an input device; 8. a base; 9. a pillar; 10. a ball outlet pipe; 11. a second detector; 12. an automatic ball outlet door; 13. a sphere; 14. a chute; 15. a lifter; 16. a slider; 17. a gear; 18. a port; 19. a rotating shaft; 20. an RFID reader; 21. an RFID electronic tag; 22. a first display screen; 23. a second display screen; 24. and (4) a groove.

Detailed Description

Several embodiments of the present invention will be described in detail below with reference to the drawings, but it should be understood that the scope of the present invention is not limited to the embodiments.

In the present application, the type and structure of components that are not specified are all the prior art known to those skilled in the art, and those skilled in the art can set the components according to the needs of the actual situation, and the embodiments of the present application are not specifically limited.

Example 1

The embodiment provides a mathematical probability demonstration model, and the mathematical probability demonstration model is realized through basic necessary technical features so as to solve the problems provided by the technical background part in the application document.

Specifically, as shown in fig. 1, an embodiment of the present invention provides a mathematical probability demonstration model, which includes a base 8, a pillar 9 is fixed on the base 8, a hollow casing 1 is fixed on the top of the pillar 9, a plurality of spheres 13 with numbers marked on the surfaces are installed in the hollow casing 1, a rotating fan 5 for making the spheres 15 move irregularly is installed in the hollow casing 1, a sphere inlet pipe 4 and a sphere outlet pipe 10 are respectively connected to the left and right sides of the lower end of the hollow casing 1, the free ends of the sphere inlet pipe 4 and the sphere outlet pipe 10 are connected through a number display pipe 6, the inner and outer surfaces and the joints of the sphere inlet pipe 4, the number display pipe 6 and the number display pipe 6 are smooth and continuous, through holes for passing through the spheres 13 are respectively opened at the joints of the hollow casing 1 and the sphere inlet pipe 4 and the sphere outlet pipe 10, wherein a sphere inlet automatic door 3 for closing and opening the through holes and recording the number of the spheres 13 are provided at the edge of the through hole corresponding to the sphere inlet pipe 4 The first detector 2, the edge of the through-hole that goes out bulb 10 and correspond is equipped with play ball automatically-controlled door 12 that is used for sealing and opening the through-hole and is used for the record to pass through the second detector 11 of the number of spheroid 13, the height that shows number pipe 6 and play bulb 10 junction is less than go into the height of bulb 4 and the display pipe 6 junction, be equipped with a plurality of being used for detecting in the display pipe 6 the recognizer of spheroid 13 surface digit, the quantity of recognizer equals and the position one-to-one with the quantity of spheroid 13 that can hold in the display pipe 6, show number pipe 6 and the junction that goes into bulb 4 be equipped with to be used for with in to the through-hole that play bulb 10 corresponds spheroid 13 the pushing mechanism in the hollow shell 1, be equipped with on the base 8 and be used for providing the user and type the digital recorder 7, be used for showing the first display screen 22 of the number of appearing of typing the digit and be used for showing the second display screen 23 of the frequency that the typing digit appears, still be equipped with central processing unit and power supply unit on the base 8, central processing unit respectively with rotatory fan 5, income ball automatically-controlled door 3, play ball automatically-controlled door 12, first detector 2, second detector 11, recognizer, pushing mechanism, income ware 7, first display screen 22 and the 23 signal connection of second display screen, power supply unit respectively with central processing unit, rotatory fan 5, income ball automatically-controlled door 3, play ball automatically-controlled door 12, first detector 2, second detector 11, recognizer, pushing mechanism, income ware 7, first display screen 22 and the 23 electricity of second display screen are connected.

In this embodiment, the player starts the invention, at which point, the player needs to enter a number on the input device 7 on the base 8, the input number is the number with the set number and is used as the number set by the player, then the central processing unit reads the number input by the player and stores the number in the buffer area, after the central processing unit reads the number, the central processing unit controls the rotary fan 5 to start working, the rotary fan 5 makes the ball body 15 in the hollow shell 1 do irregular movement, after the rotary fan 5 works for a set time, the central processing unit controls the ball inlet automatic door 3 to open so that the ball body 13 can enter the ball inlet pipe 4, meanwhile, the number of the passing balls 13 recorded by the first detector 2 is received, and when the number of the passing balls 13 recorded by the first detector 2 reaches the set number of entering balls, the central processing unit controls the automatic entering ball door 3 to be closed. The set number of the entered balls is equal to the set number of the figures entered by the player, at the moment, the central processing unit waits for the set waiting time, after the ball 13 enters the number display tube 6, the central processing unit identifies the figures on the surface of the ball 13 through the identifier and respectively sends the identified figures to the central processing unit, the central processing unit respectively compares the figures identified by the identifier with the figures set by the player, when the figures identified by the identifier are respectively consistent with the figures set by the player, the entered figures are determined to appear once, and at the same time, if not, the figures are determined to not appear, meanwhile, the central processing unit counts the frequency of appearing the entered figures and the frequency of appearing the entered figures, respectively displays the frequency of appearing the entered figures on the first display screen 22, the frequency of appearing the entered figures is displayed on the second display screen 23, and then, the central processing unit controls the pushing mechanism to push out the ball 13 in the number display tube 6, at this moment, the central processing unit controls the ball outlet automatic door 12 to be opened so that the ball 13 can enter the hollow shell 1, the number of the balls 13 passing through is recorded by the second detector 11, when the number of the balls 13 passing through and recorded by the second detector 11 reaches the set number of the balls entering, the central processing unit controls the ball outlet automatic door 12 to be closed, the central processing unit controls the pushing mechanism to return to the original position, at the moment, one experiment is completed, and for the accumulation of multiple experiments, the central processing unit and each part repeatedly perform the work.

In the embodiment of the present invention, the ball 13 is a light ball 13, and the light ball 13 similar to a table tennis ball can be blown by wind.

Example 2

The present embodiment is based on example 1 and optimizes the implementation scheme in example 1, so that the present embodiment is more stable and better in performance during the operation process, but the present embodiment is not limited to the implementation manner described in the present embodiment.

Specifically, as shown in fig. 2 to 3, the pushing mechanism includes a sliding groove 14 respectively formed at the bottoms of the display tube 6 and the ball outlet tube 10 along the length direction, the sliding groove 14 of the display tube 6 is connected with the sliding groove 14 of the ball outlet tube 10, the surface of the joint is smooth and continuous, a sliding block 16 is connected to the sliding groove 14 in a sliding manner, a lifter 15 is arranged on the sliding block 16, the upper surface of the lifter 15 does not exceed the notch of the sliding groove 14 when the lifter 15 is in the lowest state, the upper surface of the lifter 15 does not contact with the display tube 6 of the sliding groove 14 or the wall of the ball outlet tube 10 when the lifter 15 is in the highest state, the sliding block 16 is driven by a driving mechanism, the central processing unit is in signal connection with the driving mechanism, and the power supply device is electrically connected with the driving mechanism.

When the central processing unit controls the pushing mechanism to push, the central processing unit controls the lifter 15 to rise firstly, then the central processing unit controls the driving mechanism to drive the sliding block 16 to move towards the ball outlet automatic door 12, so that the ball 13 is pushed out by the lifter 15, when the central processing unit controls the pushing mechanism to return to the original position, the central processing unit controls the lifter 15 to fall firstly, and then the central processing unit controls the driving mechanism to drive the sliding block 16 to move to the original position. The chute 14 of the display tube 6 is connected with the chute 14 of the ball outlet tube 10, and the surface of the connection part is smooth and continuous, so that the driving mechanism can not influence the driving slide block 16 to move.

In this embodiment, actuating mechanism includes follows slider 16's width direction sets up the recess 24 of slider 16 bottom is equipped with the pivot 19 that can be at the internal rotation of recess 24 along the length direction of recess in the recess 24, and the one end of pivot 19 is connected with the output shaft of first motor, and first motor is fixed on the cell wall of recess 24 one side, and the other end of pivot 19 passes through the bearing and connects on the cell wall of recess 24 opposite side, and 19 shafts of pivot have gear 17 through the key-type connection, and gear 17 and rack toothing, rack are established the tank bottom of spout 14, central processing unit with first motor signal connection, power supply unit with first motor electricity is connected.

When the central processing unit controls the driving mechanism to move, a rotating instruction is sent to the first motor, the rotating direction is set according to the moving direction of the sliding block 16, the rotating shaft 19 rotates due to the rotation of the first motor, the gear 17 rotates due to the rotation of the rotating shaft 19, and the sliding block 16 slides along the sliding groove 14 due to the fact that the rack meshed with the gear 17 is arranged at the bottom of the sliding groove 14, and the effect of driving the sliding block 16 to slide on the sliding groove 14 is achieved.

In this embodiment, the number of the grooves 24 is plural, and the plural grooves 24 are respectively and uniformly distributed along the width direction of the slider 16, and the number and the positions of the rotating shaft 19, the first motor, the gear 17 and the rack are all in one-to-one correspondence with the number and the positions of the grooves 24. The plurality of gears 17 act simultaneously, so that the efficiency is higher during work.

Example 3

Specifically, an RFID electronic tag 21 with a working frequency band of 13.56M is arranged in the spherical body 13, the RFID electronic tag 21 is used for storing a number consistent with a number marked on the surface of the spherical body 13, and the identifier is an RFID reader 20 used for identifying the RFID electronic tag 21.

When the numbers on the surface of the sphere 13 are identified, the RFID electronic tag 21 with the working frequency band of 13.56M is arranged inside the sphere 13, and the corresponding RFID reader 20 is used for identifying the numbers, so that the numbers on the surface of the sphere 13 are more accurate and the identification speed is faster compared with the traditional method for detecting the numbers on the surface of the sphere 13 through image identification. Due to the small identification range of 13.56M RFID, the RFID reader 20 may not identify the RFID tag 21 in the adjacent sphere 13.

In the present embodiment, the hollow shell 1 is spherical in shape.

In this embodiment, the front of the number display tube 6 is provided with a through hole for allowing the user to observe the numbers marked on the surface of the sphere 13, and the through hole is provided with transparent glass. This allows the player to visually see the numbers on the ball 13 being shaken.

In this embodiment, the rotating fan 5 is fixed at the bottom of the hollow shell 1, the rotating fan 5 comprises a second motor fixed at the bottom of the hollow shell 1, an output shaft of the second motor is connected with a plurality of rotating blades, each rotating blade is fixed with a blower, the central processing unit is respectively connected with the second motor and the blower through signals, and the power supply device is respectively electrically connected with the second motor and the blower.

When the rotating fan 5 works, the central processing unit controls the second motor to rotate, at the moment, the plurality of rotating blades rotate, and meanwhile, the central processing unit controls the hair drier on the plurality of rotating blades to blow, so that upward rotating airflow is formed in the hollow shell 1, and the ball 13 moves.

In this embodiment, the central processing unit can also randomly change the rotation direction of the second motor, so that the airflow formed in the hollow shell 1 becomes more irregular, the movement of the ball 13 also becomes more irregular, and the generated random effect is better.

In this embodiment, the central processing unit is further in signal connection with a remote terminal, and the remote terminal is configured to receive and display data displayed on the first display screen 22 and the second display screen 23, which are sent by the central processing unit.

The data of the first display screen 22 and the second display screen 23 on the spot are presented to the remote terminal of the user in real time through the remote terminal, so that the player can observe the data in real time.

In summary, the invention discloses a mathematical probability demonstration model, which comprises a base, wherein a support is fixed on the base, a hollow shell is fixed at the top of the support, a plurality of spheres with numbers marked on the surfaces are arranged in the hollow shell, a rotary fan used for enabling the spheres to do irregular motion is arranged in the hollow shell, the left side and the right side of the lower end of the hollow shell are respectively connected with a sphere inlet pipe and a sphere outlet pipe, the free ends of the sphere inlet pipe and the sphere outlet pipe are connected through a number display pipe, the inner surfaces and the outer surfaces and the joints of the sphere inlet pipe, the number display pipe and the number display pipe are smooth and continuous, through holes used for passing through the spheres are respectively arranged at the joints of the hollow shell and the sphere inlet pipe and the sphere outlet pipe, the edges of the through holes corresponding to the sphere inlet pipe are provided with a sphere inlet automatic door used for closing and opening the through holes and a first detector used for recording the number of the spheres passing, the edge of the through-hole that goes out the bulb and correspond is equipped with the play ball automatically-controlled door that is used for sealing and opening the through-hole and is used for the record to pass through the second detector of spheroidal number, the height that shows the bulb and go out the bulb junction is less than go into the height of bulb and show the bulb junction, be equipped with a plurality ofly in the show the number of being used for detecting the digital recognizer in spheroid surface, the quantity of recognizer equals and the position one-to-one with the spheroidal number that can hold in the show the number of tubes, the show the bulb is equipped with to be used for with the junction that goes into the bulb to the through-hole department that goes out the bulb correspondence and is used for pushing the spheroid to the pushing mechanism in the hollow shell, be equipped with on the base and be used for providing the user and type the ware of typeeing digit, be used for showing the first display screen of the number of times that typeeing digit appears and be used for showing the second display screen of the frequency that type, the central processing unit is respectively in signal connection with the rotating fan, the ball inlet automatic door, the ball outlet automatic door, the first detector, the second detector, the recognizer, the pushing mechanism, the input device, the first display screen and the second display screen, and the power supply device is respectively in electric connection with the central processing unit, the rotating fan, the ball inlet automatic door, the ball outlet automatic door, the first detector, the second detector, the recognizer, the pushing mechanism, the input device, the first display screen and the second display screen. The invention picks a certain amount of numbers randomly, compares the numbers with the numbers set by the corresponding players, repeatedly executes the steps, obtains the result through statistics, and calculates the winning frequency of the current lottery ticket in real time according to the result of the statistics.

The above disclosure is only for a few specific embodiments of the present invention, however, the present invention is not limited to the above embodiments, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present invention.

Claims

1. The utility model provides a mathematics probability demonstration model, includes base (8), its characterized in that, be fixed with pillar (9) on base (8), the top of pillar (9) is fixed with hollow casing (1), is equipped with spheroid (13) that a plurality of surfaces mark digit in hollow casing (1), is equipped with in hollow casing (1) and is used for making spheroid (15) do the rotatory fan (5) of random motion, and the left and right sides of the lower extreme of hollow casing (1) is connected with respectively into bulb (4) and play bulb (10), and the free end of going into bulb (4) and the free end of going out bulb (10) are connected through number display pipe (6), go into the inside and outside surface and the junction of bulb (4), number display pipe (6) and the smooth continuity of junction, hollow casing (1) with go into bulb (4) and play bulb (10) junction respectively offer the through-hole that is used for passing through spheroid (13), wherein go into the edge of the through-hole that bulb (4) corresponds and be equipped with income ball automatically-controlled door (3) that is used for sealing and opening the through-hole and be used for the record to pass through the first detector (2) of the number of spheroid (13), the edge of the through-hole that goes out bulb (10) corresponds is equipped with and is used for sealing and opening play ball automatically-controlled door (12) of through-hole and is used for the record to pass through the second detector (11) of the number of spheroid (13), the height that highly is less than of the bulb (10) junction is gone into bulb (4) and display tube (6), be equipped with a plurality ofly in display tube (6) and be used for detecting spheroid (13) surface digital recognizer, the quantity of recognizer equals and the position one-to-one with the quantity of spheroid (13) that can hold in display tube (6), display tube (6) and the junction of going into bulb (4) are equipped with to the through-hole department that goes out bulb (10) to correspond and be used for with spheroid (13) to push into Pushing mechanism in hollow shell (1), be equipped with on base (8) and be used for providing user's entering ware (7) of entering digit, be used for showing first display screen (22) of the number of times that the entering digit appears and be used for showing second display screen (23) of the frequency that the entering digit appears, still be equipped with central processing unit and power supply unit on base (8), central processing unit respectively with revolving fan (5), income ball automatically-controlled door (3), play ball automatically-controlled door (12), first detector (2), second detector (11), recognizer, pushing mechanism, entering ware (7), first display screen (22) and second display screen (23) signal connection, power supply unit respectively with central processing unit, revolving fan (5), income ball automatically-controlled door (3), play ball automatically-controlled door (12), first detector (2), The second detector (11), the recognizer, the pushing mechanism, the recorder (7), the first display screen (22) and the second display screen (23) are electrically connected.

2. The mathematical probability demonstration model of claim 1, wherein the pushing mechanism comprises sliding grooves (14) respectively arranged at the bottoms of the display tube (6) and the ball outlet tube (10) along the length direction, the sliding grooves (14) of the display tube (6) are connected with the sliding grooves (14) of the ball outlet tube (10) and the surfaces of the connection parts are smooth and continuous, the sliding grooves (14) are connected with sliding blocks (16) in a sliding way, lifters (15) are arranged on the sliding blocks (16), the upper surfaces of the lifters (15) do not exceed the notches of the sliding grooves (14) in the lowest state of the lifters (15), the upper surfaces of the lifters (15) do not contact with the display tube (6) of the sliding grooves (14) or the tube wall of the ball outlet tube (10) in the highest state of the lifters (15), the sliding blocks (16) are driven by a driving mechanism, and the central processing unit is in signal connection with the driving mechanism, the power supply device is electrically connected with the driving mechanism.

3. The mathematical probability demonstration model as claimed in claim 2, wherein the driving mechanism comprises a groove (24) formed at the bottom of the slide block (16) along the width direction of the slide block (16), a rotating shaft (19) capable of rotating in the groove (24) is arranged in the groove (24) along the length direction of the groove, one end of the rotating shaft (19) is connected with an output shaft of a first motor, the first motor is fixed on the groove wall at one side of the groove (24), the other end of the rotating shaft (19) is connected with the groove wall at the other side of the groove (24) through a bearing, a shaft body of the rotating shaft (19) is connected with a gear (17) through a key, the gear (17) is meshed with a rack, the rack is arranged at the groove bottom of the sliding groove (14), the central processor is in signal connection with the first motor, and the power supply device is electrically connected with the first motor.

4. A mathematical probability demonstration model as claimed in claim 3, wherein there are a plurality of said grooves (24), and a plurality of said grooves (24) are respectively uniformly distributed along the width direction of said slide block (16), and the number and positions of said rotary shaft (19), said first motor, said gear (17) and said rack are in one-to-one correspondence with the number and positions of said grooves (24).

5. A mathematical probability demonstration model as claimed in claim 1, wherein an RFID tag (21) with an operating frequency of 13.56M is provided in the sphere (13), the RFID tag (21) is used for storing a number corresponding to the number marked on the surface of the sphere (13), and the identifier is an RFID reader (20) for identifying the RFID tag (21).

6. A mathematical probability demonstration model as claimed in claim 1, characterised in that said hollow shell (1) is spherical in shape.

7. A mathematical probability demonstration model as claimed in claim 1, characterised in that the display tube (6) starts with a through opening in front of it for allowing the user to observe the numbers marked on the surface of the sphere (13), the through opening being provided with transparent glass.

8. A mathematical probability demonstration model as claimed in claim 1, wherein said rotary fan (5) is fixed to the bottom of said hollow housing (1), said rotary fan (5) comprising a second motor fixed to the bottom of said hollow housing (1), the output shaft of said second motor being connected to a plurality of rotary blades, each of which is fixed to a blower, said cpu being in signal connection with said second motor and blower, respectively, and said power supply means being in electrical connection with said second motor and blower, respectively.

9. A mathematical probability demonstration model as claimed in claim 1 wherein the central processor is further in signal connection with a remote terminal for receiving and displaying data transmitted by the central processor displayed on the first display screen (22) and the second display screen (23).