CN210865272U - Normal analysis presentation device for mathematical statistics - Google Patents

Abstract

The utility model relates to the technical field of teaching demonstration devices, in particular to a normal analysis demonstration device for mathematical statistics, which comprises two limiting seats, and a connecting frame is detachably connected between the two limiting seats, sliding grooves are symmetrically arranged on two sides of the connecting frame, the connecting frame is connected with two photoelectric sensors through sliding, the chute is connected with two supporting blocks through sliding, the supporting block is provided with a bracket, the top of the bracket is provided with two connectors, the outer side of the circumference of each connector is provided with a fixed connecting shaft, the device reasonable in design simple structure has not only realized that quick installation is fixed, has made things convenient for this presentation device's transport and deposit, can also direct demonstration concrete experimental data, and the convenience of very big degree the teacher explains normal analysis, helps the student to understand, is fit for promoting.

Description

Normal analysis presentation device for mathematical statistics

Technical Field

The utility model relates to a teaching presentation device technical field especially relates to a normal analysis presentation device is used to mathematical statistics.

Background

Along with the development of economy, the requirement of people on the teaching quality is higher and higher, the government pays more and more attention to education, auxiliary equipment for teaching is more and more, as students, class learning is a main learning mode, teachers teach students with knowledge in a class teaching mode, but some classes are dull in nature, students listen to the dull, teachers do not have the desire to teach the students, so a large number of teaching auxiliary equipment is provided, teachers can vividly teach some boring knowledge to students, the probability theory and mathematical statistics related contents of the class are richer, knowledge points are more, the mathematical statistics concepts are abstract and difficult to understand, although the teaching form of teachers is changed into electronic courseware for tutoring teaching, the students still cannot intuitively help the students to understand the principle of the class, and therefore a demonstration device is needed for assisting teaching, but present normal analysis presentation device for mathematical statistics demonstrates effect lively, but can not audio-visually demonstrate concrete statistics experimental data, needs oneself to go to statistics experimental data in person, and it is very loaded down with trivial details to use to the most formula structures as an organic whole of device, all very inconvenient when carrying and depositing, can't satisfy the actual demand in the teaching, provides a normal analysis presentation device for mathematical statistics for this reason.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the shortcoming that the existing normal analysis presentation device for mathematical statistics can not show concrete experimental data and carry and deposit and is very inconvenient among the prior art.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a normal analysis demonstration device for mathematical statistics is designed, which comprises two limiting seats, wherein a connecting frame is detachably connected between the two limiting seats, sliding grooves are symmetrically formed in two sides of the connecting frame, two photoelectric sensors are connected to the connecting frame in a sliding manner, two supporting blocks are connected to the sliding grooves in a sliding manner, a support is arranged on each supporting block, two connectors are arranged at the top of each support, a fixed connecting shaft is arranged on the outer side of the circumference of each connector, a second bearing is arranged at the center of the fixed connecting shaft, a connecting rod is arranged on the inner side of the circumference of the second bearing, a spherical connector is arranged at one end of each connecting rod, a motor is arranged at one end of each connecting rod, which is far away from the spherical connector, a press switch is electrically connected to one end of the motor through a lead, and a rotary table is, the lower terminal surface of carousel is equipped with a plurality of connecting axles, every be equipped with rotating vane through rotating to connect on the connecting axle, it is left one side that photoelectric sensor is close to rotating vane is equipped with the laser emission head, every the equal symmetry in photoelectric sensor left and right sides is equipped with the fixed block, be equipped with spacing post through sliding connection on the fixed block, the one end of spacing post is equipped with spacing dish, be equipped with the spring between spacing dish and the fixed block.

Preferably, a plurality of limiting holes are symmetrically arranged on the connecting frame at equal intervals, the diameter of each limiting column is the same as that of each limiting hole, and one end, far away from each limiting column, of the fixing block extends into each limiting hole.

Preferably, the photoelectric sensor on the left side is an emitting end, the photoelectric sensor on the right side is a receiving end, and the photoelectric sensor on the right side is electrically connected with an external counter through a wire.

The utility model provides a pair of normal analysis presentation device is used to mathematical statistics, beneficial effect lies in: when in use, one limiting seat is connected with the connecting frame, the left photoelectric sensor, the supporting block and the right photoelectric sensor are sequentially connected on the connecting frame in a sliding manner, the other limiting seat is connected with the connecting frame, the limiting column is pulled, the locking state is released, the photoelectric sensor is moved to a proper position, the limiting column is loosened, the limiting column is inserted into the limiting hole under the action of a spring to realize installation and fixation, after the experiment is finished, all parts of the device are detached from the connecting frame, the carrying and storage of the demonstration device are greatly facilitated, the left photoelectric sensor is started, laser is emitted through the laser emitting head, the press switch is pressed for a specified time and loosened, the output end of the motor can drive the connecting rod to rotate when the press switch is pressed, and the spherical connector rotates together, further, the turntable is rotated, when the turntable rotates, the rotating blade can shield laser, so that the photoelectric sensor on the right side can intermittently receive signals, when the signals are not received each time, the photoelectric sensor on the right side can transmit the signals to the external counter, the external counter is enabled to count the times, the motor stops rotating after the press switch is released, the experiment stops, the data of the external counter is recorded, an experiment is completed, and the time for rotating the motor each time is controlled by the experimenter through the press switch during the experiment, so that even if fixed press time is specified, the numbers displayed by the counter cannot be completely the same, the distribution range of the numbers can be visually and clearly seen through transverse comparison of experimental data for a plurality of times, so that the course is explained through specific numbers, convenience is brought to teachers for explaining normal analysis, and students can understand the course conveniently, the device reasonable in design simple structure has not only realized that quick installation is fixed, has made things convenient for this presentation device's transport and deposit, can also direct demonstration concrete experimental data, and the convenience of very big degree the teacher explains normal analysis, helps the student to understand, is fit for promoting.

Drawings

Fig. 1 is a schematic view of a three-dimensional structure of a normal analysis demonstration device for mathematical statistics provided by the present invention;

fig. 2 is the utility model provides a normal analysis presentation device's section structure schematic diagram is used in mathematical statistics.

In the figure: the device comprises a limiting seat 1, a connecting frame 2, a photoelectric sensor 3, a laser emitting head 4, a rotary table 5, a connector 6, a motor 7, a press switch 8, a fixed connecting shaft 9, a support 10, a connecting rod 11, a spherical connector 12, a rotating blade 13, a limiting column 14, a fixed block 15, a spring 16, a limiting disc 17, a sliding groove 18, a supporting block 19, a second bearing 20 and a connecting shaft 21.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

referring to fig. 1-2, a normal analysis demonstration device for mathematical statistics is designed, which comprises two limiting seats 1, wherein two limiting seats 1 are arranged, a connecting frame 2 is detachably connected between the two limiting seats 1, sliding grooves 18 are symmetrically formed in two sides of the connecting frame 2, two photoelectric sensors 3 are connected to the connecting frame 2 through sliding, two supporting blocks 19 are connected to the sliding grooves 18 in a sliding manner, a support 10 is arranged on each supporting block 19, two connectors 6 are arranged at the top of the support 10, a fixed connecting shaft 9 is arranged on the outer side of the circumference of each connector 6, a second bearing 20 is arranged at the center of the fixed connecting shaft 9, a connecting rod 11 is arranged on the inner side of the circumference of the second bearing 20, a spherical connector 12 is arranged at one end of the connecting rod 11, a motor 7 is arranged at one end of the connecting rod 11 far away from the spherical connector 12, a press switch 8 is arranged at, the lower terminal surface of carousel 5 is equipped with a plurality of connecting axles 21, connects through rotating on every connecting axle 21 and is equipped with rotating vane 13, and one side that left photoelectric sensor 3 is close to rotating vane 13 is equipped with laser emission head 4, and every photoelectric sensor 3 left and right sides all symmetry is equipped with fixed block 15, is equipped with spacing post 14 through sliding connection on the fixed block 15, and the one end of spacing post 14 is equipped with spacing dish 17, is equipped with spring 16 between spacing dish 17 and the fixed block 15.

Equidistant symmetry is provided with a plurality of spacing holes on link 2, the diameter of spacing post 14 is the same with the diameter in spacing hole, fixed block 15 one end that spacing post 14 kept away from stretches into to spacing downthehole, earlier be connected with link 2 with a spacing seat 1 during the use, then in proper order with left side photoelectric sensor 3 and supporting shoe 19 and right side photoelectric sensor 3 sliding connection on link 2, be connected another spacing seat 1 and link 2, pulling spacing post 14 after that, relieve the lock-out state, moving photoelectric sensor 3 to suitable position, loosen spacing post 14 after that, under spring 16's effort, insert spacing post 14 to spacing hole in, realize the installation fixed, after the experiment, dismantle the device's each part from the link, the very big degree has made things convenient for this presentation device's transport and deposit.

The photoelectric sensor 3 on the left side is a transmitting end, the photoelectric sensor 3 on the right side is a receiving end, the photoelectric sensor 3 on the right side is electrically connected with an external counter through a wire, the photoelectric sensor 3 on the left side is started, laser is transmitted through the laser transmitting head 4, the push switch 8 is pressed for a specified time and is released, the output end of the motor 7 is driven to rotate with the connecting rod 11 when the push switch 8 is pressed, the spherical connector 12 is driven to rotate together, the rotary disc 5 is driven to rotate, the rotary blade 13 can shield the laser when the rotary disc 5 rotates, therefore, the photoelectric sensor 3 on the right side intermittently receives signals, the photoelectric sensor 3 on the right side transmits the signals to the external counter when the signals are not received each time, the external counter counts once, the motor 7 stops rotating after the push switch 8 is released, the experiment stops, and data of the external counter are recorded, accomplish an experiment, because 7 pivoted time of motor at every turn are that the experimenter passes through push switch 8 control during the experiment, consequently even stipulated fixed press time, the digit that the counter shows also can not be identical, transversely contrast through experimental data many times, can be directly perceived clear see out the distribution range of digit, so explain the course through specific digit, just can be very big degree make things convenient for the teacher to explain normal analysis, help the student to understand.

Above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the design of the present invention, equivalent replacement or change should be covered within the protection scope of the present invention.

Claims (3)

1. The normal analysis demonstration device for the mathematical statistics comprises two limiting seats (1), wherein the two limiting seats (1) are detachably connected with each other to form a connecting frame (2), sliding grooves (18) are symmetrically formed in two sides of the connecting frame (2), the normal analysis demonstration device is characterized in that the connecting frame (2) is connected with two photoelectric sensors (3) in a sliding mode, the sliding grooves (18) are connected with two supporting blocks (19) in a sliding mode, supports (10) are arranged on the supporting blocks (19), two connectors (6) are arranged at the tops of the supports (10), a fixed connecting shaft (9) is arranged on the outer side of the circumference of each connector (6), a second bearing (20) is arranged at the center of each fixed connecting shaft (9), a connecting rod (11) is arranged on the inner side of the circumference of each second bearing (20), and a spherical connector (12) is arranged at one end of each connecting rod (11), one end of the connecting rod (11) far away from the spherical connector (12) is provided with a motor (7), one end of the motor (7) is electrically connected with a press switch (8) through a lead, the outer wall of the circumference of the spherical connector (12) is provided with a turntable (5) through rotary connection, a plurality of connecting shafts (21) are arranged on the lower end face of the rotary disc (5), each connecting shaft (21) is rotatably connected with a rotating blade (13), a laser emitting head (4) is arranged on one side, close to the rotating blade (13), of the left photoelectric sensor (3), fixed blocks (15) are symmetrically arranged on the left side and the right side of each photoelectric sensor (3), a limiting column (14) is arranged on the fixing block (15) through sliding connection, a limiting disc (17) is arranged at one end of the limiting column (14), and a spring (16) is arranged between the limiting disc (17) and the fixing block (15).

2. The normal analysis demonstration device for mathematical statistics as claimed in claim 1, characterized in that the connecting frame (2) is provided with a plurality of spacing holes equidistantly and symmetrically, the diameter of the spacing post (14) is the same as that of the spacing hole, and one end of the fixing block (15) far away from the spacing post (14) extends into the spacing hole.

3. The normal analysis demonstration device for mathematical statistics as claimed in claim 1, wherein the left side of the photoelectric sensor (3) is an emitting end, the right side of the photoelectric sensor (3) is a receiving end, and the right side of the photoelectric sensor (3) is electrically connected with an external counter through a wire.

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