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Mathematical probability demonstration device

A demonstration device and probability technology, which is applied in the field of mathematical probability demonstration devices, can solve problems such as unfavorable demonstration and insufficient probability demonstration, and achieve the effect of convenient demonstration

Inactive Publication Date: 2020-07-31
XI'AN PETROLEUM UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing technology, in mathematics teaching, the demonstration of probability is not clear enough, which is not conducive to the demonstration in teaching, and if the speed is fast, it is difficult to count the results of probability, so there is room for improvement

Method used

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  • Mathematical probability demonstration device
  • Mathematical probability demonstration device

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with accompanying drawing:

[0017] like figure 1 and figure 2 As shown: the present invention includes a rotating disk 1, a bead outlet pipe 2, a driving motor 4 and a base 5, the driving motor 4 is fixedly arranged on the base 5, the lower end of the rotating disk 1 is connected to the bottom of the driving motor 4 The rotating shaft is fixedly connected, and a plurality of bead outlet tubes 2 are arranged on the circumference of the rotating disk 1 .

[0018] As an improvement, an infrared sensor 3 for detecting beads is arranged on the side of the bead outlet tube 2 .

[0019] Preferably, the infrared sensor 3 adopts wireless transmission.

[0020] Specifically, the infrared sensor 3 is powered by a button battery.

[0021] As an improvement, one side of the base 5 is provided with a column 6, and the upper end of the column 6 is provided with a bead opening 7, and the bead opening 7 is connec...

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Abstract

The invention discloses a mathematical probability demonstration device which comprises a rotating disc, bead outlet pipes, a driving motor and a base. The driving motor is fixedly arranged on the base, a lower end of the rotating disc is fixedly connected with a rotating shaft of the driving motor, and a plurality of bead outlet pipes are arranged on the circumference of the rotating disc. The rotating disc is started to rotate; steel balls are placed in the middle of the rotating disc; the rotation of the rotating disc enables the steel balls to run to the edge of the rotating disc under centrifugal force and to be discharged from one ball outlet pipe on the rotating disc randomly such that the probability of discharging the steel balls is obtained, the demonstration is convenient, the bead outlet pipes are provided with infrared sensors, the automatic and accurate distinguishing of the ball outlet probability is facilitated, the mathematical probability teaching is facilitated, andthe popularization and application value is achieved.

Description

technical field [0001] The invention relates to a teaching device, in particular to a mathematical probability demonstration device. Background technique [0002] Probability is a numerical measure of the likelihood of an event occurring by chance. If after repeated experiments (represented by X), the accidental event (represented by A) appeared several times (represented by Y). With X as the denominator and Y as the numerator, a numerical value (represented by P) is formed. In multiple experiments, P is relatively stable at a certain value, and P is called the probability of A appearing. If the probability of an accidental event is determined through long-term observation or a large number of repeated experiments, this probability is statistical probability or empirical probability. In the prior art, in mathematics teaching, the demonstration of probability is not clear enough, which is not conducive to the demonstration in teaching, and if the speed is fast, it is diffi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09B23/02
CPCG09B23/02
Inventor 付瑞琴马儇龙杨海
Owner XI'AN PETROLEUM UNIVERSITY
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