Random sampling device for statistics

Abstract

The utility model relates to the field of statistical equipment, and discloses a random sampling device for statistics, which comprises a first disc body with an upward opening and a column body, the bottom of the first disc body is fixedly connected with the column body, the top surface of the first disc body is provided with a through hole, a sphere is placed in the first disc body, the diameter of the sphere is smaller than that of the through hole, and the through hole is communicated with the through hole. The inner side wall of the first disc body is fixedly connected with an annular pipe, the inner side of the annular pipe communicates with a nozzle, an air pump is fixed to one side of the first disc body, and the air outlet end of the air pump is connected with the annular pipe through an air pipe. The novel ball body rolls under the action of gas flow, so that the ball body falls off through a certain through hole in the moving process, the operation is repeated, the number of times that the ball body falls off through each through hole is recorded, statistics is completed, and the number of the ball bodies placed in the first disc body is changed, and initial conditions of random sampling are changed. The device is used for simulating random sampling under more conditions, so that the application range of the device is widened.

Description

Technical Field

[0001] The utility model relates to the technical field of statistical equipment, in particular to a random sampling device for statistics. Background Art

[0002] In statistics, random sampling is an inferential statistical method that extracts a part of individuals from the target population as a sample, observes one or some attributes of the sample, and makes an estimate of the quantitative characteristics of the population with a certain degree of reliability based on the data obtained, thereby achieving an understanding of the population.

[0003] Announcement No.: CN 213301716 U discloses a random sampling device for applied statistics, including a control box, a touch screen fixedly installed on the right end of the front wall of the control box, a connecting line connected to the rear wall of the control box, and a signal transmitter fixedly connected to the other end of the connecting line, a back cover fixedly installed on the bottom of the signal transmitter, and a gasket is installed in contact with the other side wall of the back cover, a sampling box is connected to the right end of the gasket, and a storage tank is sleeved on the bottom of the outer ring surface of the sampling box, and a bottom plate is installed in contact with the bottom of the storage tank, a sampling control lever is rotatably installed on the top of the front wall of the control box, a mounting frame is welded and installed on the top of the left front side of the sampling box, and a sampling motor is installed in contact with the right wall of the mounting frame, and a digital sampler is rotatably installed on the lower left side of the sampling motor, which solves the problem that traditional random sampling devices require repeated placement of objects and low efficiency of manual counting.

[0004] In the process of using, the previous random sampling device can only simulate the random sampling operation within a specified range according to the initial parameters of the device, but cannot conveniently change the initial parameters, resulting in a small application range of the device. Therefore, those skilled in the art provide a statistical random sampling device to solve the problems raised in the above background technology. Utility Model Content

[0005] The main purpose of the utility model is to provide a statistical random sampling device to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A random sampling device for statistics comprises a first disk body and a column body with an opening upward, wherein the bottom of the first disk body is fixedly connected to the column body, a through hole is provided on the top surface of the first disk body, a sphere is placed in the first disk body, the diameter of the sphere is smaller than the diameter of the through hole, an annular tube is fixedly connected to the inner wall of the first disk body, the inner side of the annular tube is connected to a nozzle, an air pump is fixed to one side of the first disk body, and the air outlet end of the air pump is connected to the annular tube through an air pipe.

[0008] Furthermore, a plurality of fixing holes are equidistantly formed at the bottom of the first disk body along the circumference, and gear rods are inserted into the fixing holes, and the distance between the gear rods is smaller than the diameter of the sphere.

[0009] Furthermore, the tops of the plurality of gear levers are commonly connected to a plate body, and a fan-shaped through groove is provided on the top of the plate body.

[0010] Furthermore, a rubber sleeve is glued and connected to the periphery of the gear lever inserted into the fixing hole.

[0011] Furthermore, a handle is fixedly connected to the top of the board body, and the handle is located at the center of the board body.

[0012] Furthermore, a base is fixedly connected to the bottom of the column, and the base is made of steel.

[0013] Furthermore, a second disk is disposed at the bottom of the first disk, and the second disk is fixed to the periphery of the column.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The ball will roll under the action of gas flow, so that the ball will fall through a through hole during the movement. This operation is repeated, and the number of times the ball falls through each through hole is recorded to complete the statistics. In addition, by changing the number of balls placed in the first plate, the initial conditions of random sampling are changed to simulate random sampling in more situations, thereby improving the applicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is a schematic diagram of the overall structure of a random sampling device for statistics.

[0017] Figure 2 The utility model is a schematic diagram of the first disk structure of a random sampling device for statistics.

[0018] Figure 3 The utility model is a schematic diagram of the connection structure of a plate body and a gear lever of a random sampling device for statistics.

[0019] Figure 4 The utility model is a schematic diagram of the connection structure of an annular tube, a nozzle and an air pump of a random sampling device for statistics.

[0020] In the figure: 1, base; 2, column; 3, second plate; 4, first plate; 5, nozzle; 6, annular tube; 7, plate; 8, handle; 9, gear lever; 10, through hole; 11, sphere; 12, air pump; 13, fixing hole; 14, fan-shaped through groove; 15, rubber sleeve. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] like Figure 1-4 As shown, a random sampling device for statistics includes a first disk body 4 with an opening upward and a column 2, the bottom of the first disk body 4 is fixedly connected to the column 2, the top surface of the first disk body 4 is provided with a through hole 10, a sphere 11 is placed in the first disk body 4, the diameter of the sphere 11 is smaller than the diameter of the through hole 10, an annular tube 6 is fixedly connected to the inner wall of the first disk body 4, the inner side of the annular tube 6 is connected to a nozzle 5, an air pump 12 is fixed to one side of the first disk body 4, and the air outlet end of the air pump 12 is connected to the annular tube 6 through an air pipe.

[0023] The sphere 11 can be separated from the first disk body 4 through the through hole 10, and the air pump 12 can blow into the first disk body 4 through the annular tube 6 and the nozzle 5, so that the sphere 11 rolls in the first disk body 4, and then the sphere 11 falls through a certain through hole 10 during the movement. The number of times the sphere 11 passes through a certain through hole 10 is counted and sampling is performed, thereby achieving the purpose of random sampling.

[0024] A plurality of fixing holes 13 are equidistantly formed at the bottom of the first disk body 4 along the circumference, and the fixing holes 13 are inserted with the gear rods 9 . The distance between the gear rods 9 is smaller than the diameter of the sphere 11 .

[0025] like Figure 1 , 2 As shown in FIG. 3 , the stop rod 9 can intercept the ball 11 to prevent the ball 11 from being stuck at the angle between the annular tube 6 and the nozzle 5 .

[0026] The tops of the plurality of shift rods 9 are commonly connected to a plate body 7 , and a fan-shaped through groove 14 is formed on the top of the plate body 7 .

[0027] like Figure 3 As shown, a person can control a plurality of levers 9 through the plate body 7 , and a person can control the movement of the tubular sphere 11 through the fan-shaped through slot 14 .

[0028] A rubber sleeve 15 is glued and connected to the outer periphery of the shift rod 9 inserted into the fixing hole 13 .

[0029] like Figure 3 As shown, the rubber sleeve 15 has good deformation ability, which can improve the connection stability between the fixing hole 13 and the gear lever 9.

[0030] A handle 8 is fixedly connected to the top of the plate body 7 , and the handle 8 is located at the center of the plate body 7 .

[0031] like Figure 3 As shown, a person can apply force to the board body 7 through the handle 8 to control the movement of the board body 7 .

[0032] like Figure 1 As shown, the bottom of the column 2 is fixedly connected to a base 1, which is made of steel material and is heavy, so that the device has good stability after being placed.

[0033] The second plate body 3 is disposed at the bottom of the first plate body 4 , and the second plate body 3 is fixed to the periphery of the column body 2 .

[0034] like Figure 1 As shown, the second tray 3 can receive the balls 11 that fall through the through holes 10 to collect the balls 11 .

[0035] The working principle of the utility model is: the air pump 12 is connected to the mains electricity, so that the air pump 12 can blow air into the first disk body 4 through the nozzle 5. At this time, the ball 11 in the first disk body 4 will roll under the action of the gas flow, so that the ball 11 falls through a certain through hole 10, and this operation is repeated. The number of times the ball 11 falls from each through hole 10 is recorded to complete the statistics. In addition, by changing the number of balls 11 placed in the first disk body 4, the initial conditions of random sampling are changed to simulate random sampling in more situations, thereby improving the scope of application of the device.

[0036] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A random sampling device for statistics, comprising a first disk (4) with an opening facing upward and a column (2), characterized in that: The bottom of the first disk body (4) is fixedly connected to the column body (2); a plurality of through holes (10) are provided on the top surface of the first disk body (4); a sphere (11) is placed inside the first disk body (4); the diameter of the sphere (11) is smaller than the diameter of the through hole (10); an annular tube (6) is fixedly connected to the inner wall of the first disk body (4); the inner side of the annular tube (6) is connected to a nozzle (5); an air pump (12) is fixedly provided on one side of the first disk body (4); the air outlet end of the air pump (12) is connected to the annular tube (6) via an air pipe.

2. A statistical random sampling device according to claim 1, characterized in that: The inner bottom of the first disk body (4) is provided with a plurality of fixing holes (13) at equal intervals along the circumference, and the fixing holes (13) are inserted with gear rods (9), and the distance between the gear rods (9) is smaller than the diameter of the sphere (11).

3. A statistical random sampling device according to claim 2, characterized in that: The tops of the plurality of shift rods (9) are commonly connected to a plate body (7), and a fan-shaped through groove (14) is provided on the top of the plate body (7).

4. A statistical random sampling device according to claim 2 or 3, characterized in that: The outer periphery of the shift rod (9) inserted into the fixing hole (13) is glued and connected with a rubber sleeve (15).

5. A statistical random sampling device according to claim 3, characterized in that: A handle (8) is fixedly connected to the top of the plate body (7), and the handle (8) is located at the center of the plate body (7).

6. A statistical random sampling device according to claim 1, characterized in that: The bottom of the column (2) is fixedly connected to a base (1), and the base (1) is made of steel.

7. A statistical random sampling device according to claim 1, characterized in that: A second disk body (3) is arranged at the bottom of the first disk body (4), and the second disk body (3) is fixed to the periphery of the column (2).

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