Demonstration device for discrete mathematical probability experiment

A demonstration device and technology for experiments, applied in educational appliances, teaching models, instruments, etc., can solve the problems of single demonstration device, not intuitive enough, and troublesome to use, and achieve the effect of ensuring accuracy and saving space.

Active Publication Date: 2019-04-26
HARBIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In college mathematics probability courses, probability is difficult to derive through formulas, and teachers often only use a coin toss, record the number of occurrences of heads and tails, and then make simple statistics and explain it, which is not intuitive enough and difficult for students to grasp related information
In order to ensure the accuracy of the probability event, it is sometimes necessary to randomly select values ​​and demonstrate through multiple experiments. Although the existing probability event demonstration device is intuitive and clear, when demonstrating the demons

Method used

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  • Demonstration device for discrete mathematical probability experiment
  • Demonstration device for discrete mathematical probability experiment
  • Demonstration device for discrete mathematical probability experiment

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Experimental program
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specific Embodiment approach 1

[0019] Specific implementation mode one: as Figure 1~Figure 6 As shown, the present invention discloses a demonstration device for discrete mathematical probability experiments, including a box body 1, a cover plate 2, an initial mixing tank 3, a moving device 4, a retractable collection box 5, a stirring mechanism 6, and a flap control mechanism 7. The control mechanism of the ball ejection board 8, the ball pushing device 9, a plurality of goal flaps 10 and at least one ball blocking board 11;

[0020] The upper end of the box body 1 is an open end, and the left and right side plates, the front side plate and the bottom plate of the box body 1 are all fixed side plates, and the bottom plate of the box body 1 is provided with at least one through ball hole 1-1, and the box body 1. At least one ball blocking plate 11 is slidably provided on the lower end surface of the bottom plate. The number of the ball blocking plates 11 is consistent with the number of the through ball ho...

specific Embodiment approach 2

[0021] Specific implementation mode two: as figure 1 , figure 2 As shown, this embodiment is a further description of Embodiment 1. The mobile device 4 includes four telescopic outriggers 4-1 and four universal casters 4-2;

[0022] The upper ends of the four telescopic outriggers 4-1 are all fixedly connected to the lower end surface of the bottom plate of the box body 1, and the lower ends of each telescopic outrigger 4-1 are fixedly connected to the corresponding universal casters 4-2.

specific Embodiment approach 3

[0023] Specific implementation mode three: as figure 2 As shown, this embodiment is a further description of the second embodiment, each of the telescopic outriggers 4-1 includes an inner tube 4-11, an outer tube 4-12 and a top wire 4-13;

[0024] The upper end of the inner pipe 4-11 is fixedly connected to the lower end of the bottom plate of the box body 1, the lower end of the outer pipe 4-12 is fixedly connected to the universal caster 4-2, and the lower end of the inner pipe 4-11 is connected to the outer The upper ends of the pipes 4-12 are nested and fixedly connected by the top wire 4-13.

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Abstract

The invention discloses a demonstration device for a discrete mathematical probability experiment and belongs to the technical field of teaching experiment aided equipment. A ball passing hole is formed in a bottom plate of a box body; a ball baffle is arranged on the bottom plate of the box body in a sliding manner; a telescopic collection box is connected to the bottom plate of the box body in asliding manner; a moving device is fixed at the lower end of the box body; a stirring mechanism is fixed in the box body; a ball pushing device is fixed in the box body; the box body is fixedly connected with a preliminary mixing tank; multiple ball inlet turning plates are mounted in the preliminary mixing tank by virtue of a turning plate control mechanism; the turning plate control mechanism is fixed on the box body; a rear side plate of the box body is hinged onto the preliminary mixing tank by virtue of a hinge; a transverse rod is fixed on a rear side plate of the box body and connectedwith a ball outlet plate control mechanism; and the ball outlet plate control mechanism is fixed on the box body. The demonstration device disclosed by the invention is intuitive and can be continuously operated, so that the students are easy to understand, and the learning efficiency is improved. Meanwhile, the demonstration balls are fully discrete and are mixed, the accuracy of a probability event is ensured, the demonstration balls are automatically collected after demonstration completion, and time and labor can be saved.

Description

technical field [0001] The invention relates to a demonstration device for mathematical probability, in particular to a demonstration device for discrete mathematical probability experiments, which belongs to the technical field of teaching experiment auxiliary equipment. Background technique [0002] In college mathematics probability courses, probability is difficult to derive through formulas, and teachers often only use a coin toss, record the number of occurrences of heads and tails, and then make simple statistics and explain it, which is not intuitive enough and difficult for students to grasp related information. In order to ensure the accuracy of probability events, sometimes it is necessary to randomly select values ​​and demonstrate through multiple experiments. Although the existing probability event demonstration device is intuitive and clear, when demonstrating the demonstration ball, the demonstration ball is placed in the demonstration slot. The small balls ...

Claims

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Application Information

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IPC IPC(8): G09B23/02
CPCG09B23/02
Inventor 黄永辉
Owner HARBIN UNIV
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