A mathematical probability demonstration device

Abstract

The present invention belongs to the technical field of probability demonstration, specifically a mathematical probability demonstration device, comprising a box, the bottom wall of the box is provided with a rectangular groove, and a spring plate is hinged at the rectangular groove, and one end of the spring plate is hinged on The rectangular groove is close to one end of the middle part of the bottom wall of the box body, the other end of the spring plate is close to the inner cavity edge of the box body and rotates freely, the top of the spring plate is provided with a guide groove, and the depth of the guide groove at the end far away from the hinge point of the spring plate is greater than The depth of one end close to the hinge point of the spring plate, the width value of the end of the guide groove away from the hinge point of the spring plate is smaller than the width value of the end close to the hinge point of the spring plate; the present invention marks different colors on both sides of the disc, and through the color The recognizer recognizes the color on the disc, so that the results of disc throwing can be counted accurately and quickly, replacing the manual counting method, making the counting process fast and efficient, and reducing possible errors and errors in the counting process, thus ensuring the accuracy of the probability.

Description

technical field [0001] The invention belongs to the technical field of probability demonstration, in particular to a mathematical probability demonstration device. Background technique [0002] Probability is also called probability, chance rate or probability. Probability is the basic concept of mathematical probability theory. It is a real number between 0 and 1, and it is a measure of the possibility of random events. The application of the concept of probability in life can represent the quantity of the possibility of random events, which is an attribute inherent in the event itself that does not change with people's subjective wishes. [0003] There are also some technical solutions about probability demonstrations in the prior art, such as a Chinese patent with application number CN201510151874.1, which discloses an advanced mathematical probability demonstration device, including a base, an ejection assembly, and a coin supply assembly During the demonstration proce...

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Problems solved by technology

[0003] There are also some technical solutions about probability demonstrations in the prior art, such as a Chinese patent with application number CN201510151874.1, which discloses an advanced mathematical probability demonstration device, including a base, an ejection assembly, and a coin supply assembly During the demonstration process, one coin after another was thrown, avoiding the time-consuming and labor-intensive problems caused by the statistician holding the coin for tossing, and liberating manpower; the coin tossing is mainly composed of cylinders, springs and electromagnets. Control, high degree of automation; the spring, first cylinder and electromagnet of each ejection assembly are the same. During the coin tossing process, it can ensure that the throwing environment is the same every time the coin is tossed, ensuring the accuracy of the test results and The persuasiveness of the test; the demonstration device is convenient and simple to operate, and can be popularized and applied on university campuses, but the patent needs to toss multiple coins, and each toss requires manual statistics, which makes the statistical process time-consuming and laborious, and each coin There is a difference between the front and back of the coin, and the weight of the front and back of the coin also has a certain weight difference, which makes the demonstration result have a certain error, thus affecting the accuracy of the probability

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