CN107731057B

CN107731057B - Propeller photographing distortion simulation device and application method thereof

Info

Publication number: CN107731057B
Application number: CN201711222221.3A
Authority: CN
Inventors: 张舜尧
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-11-29
Filing date: 2017-11-29
Publication date: 2023-04-07
Anticipated expiration: 2037-11-29
Also published as: CN107731057A

Abstract

The invention discloses a propeller photographing distortion simulation device which comprises propellers and a base, wherein a rectangular groove is formed in the base, a drawable drawing plate is arranged at the bottom of the groove, a long hole groove perpendicular to the drawing direction is formed in the middle of the drawing plate, the propellers are erected on the groove, the bottoms of blades are close to the upper surface of the drawing plate, the moving area of the long hole groove covers the orthographic projection area of the propellers, soft cloth is connected to the outer edge of the bottom of each propeller blade, and the long hole groove is located in the drawing direction. The use method of the propeller photographing distortion simulation device is also disclosed, and the simulation display effect is achieved by placing paper below the drawing plate and impregnating pigment on soft cloth and then rotating the propeller and drawing the drawing plate; the invention has the beneficial effects that: the structure is reasonable, the manufacture and the popularization are convenient, and the principle demonstration is clear and clear; the application method is simple, people in different age groups can use the device quickly, and the device can interact with each other and teach through lively activities.

Description

Propeller photographing distortion simulation device and application method thereof

Technical Field

The invention relates to a propeller photographing distortion simulation device and a use method thereof, and belongs to the technical field of experimental equipment and simulation.

Background

In daily life, when a plurality of people shoot the rotating propellers, the people have a doubt as to why the propellers in shot pictures are deformed, the deformed shapes of the same propeller pictures shot by different cameras and mobile phones are different, and the propellers shot by the same lens at different rotating speeds can obtain different pictures. Most people, facing the doubt, want to explore an understanding, especially students, but the searched data are large-section formulas and professional terms, so that the understanding is difficult, and many people choose to give up to continuously exploring the reason; there is no device for demonstrating the principle in the prior art, so a novel experimental device or scientific prop is needed to assist understanding.

Disclosure of Invention

In order to overcome the defects, the invention provides the propeller photographing distortion simulation device which is used for simulating camera photographing and propeller rotation, displaying different distortion results according to different speeds, and being reasonable in structure and clear in principle demonstration.

In order to overcome the defects, the invention further provides a using method of the propeller photographing distortion simulation device.

In order to achieve the purpose, the technical scheme of the invention is as follows: the utility model provides a screw distortion analogue means that shoots, includes the screw, still includes a base, be equipped with a rectangle recess on the base, the recess bottom is equipped with the drawing board of a telescopic, the drawing board middle part is equipped with the slot with pull direction vertically, the screw erects on the recess and the paddle bottom is close the drawing board upper surface, and slot motion region covers screw orthographic projection region, and every screw paddle bottom outer fringe is connected with soft cloth, the slot is located the pull direction.

Preferably, the groove penetrates through one side edge or two side edges of the base in the moving direction of the drawing plate.

A using method of a propeller photographing distortion simulation device comprises the following steps:

step 1), paving and fixing a piece of paper below the drawing plate, wherein the paper is positioned right below the propeller and covers the orthographic projection area of the propeller;

step 2), soaking a water-based dye on the soft cloth;

step 3), arranging a long hole groove on the drawing plate to be positioned at the inner side edge of the forward projection area of the propeller or at a position closer to the inner side;

step 4), rotating the propeller at a constant speed and drawing the pulling plate outwards at a constant speed, wherein the soft cloth below the propeller can be swept into the long hole groove and leave a trace on the paper when passing through the long hole groove;

step 5), stopping rotating the propeller and drawing the drawing plate when the long hole slot reaches the outer edge of the orthographic projection area of the propeller or is further away from the outer position;

and 6) taking out the paper, wherein the dye trace on the paper is the propeller photographing distortion shape.

Preferably, the paper is white paper and the aqueous dye is ink.

A CMOS sensor is commonly used in digital cameras, which uses an electronic rolling shutter. The electronic rolling shutter pull-down shutter utilizes a switching-on and switching-off control sensor to lead different parts of the electronic rolling shutter to have different sensitivities to light in different time, thereby realizing line-by-line exposure and recording and storing pixels on a shutter line. All pixels are recorded and stored as the shutter release moves. Because of the line-by-line exposure, there is a priori a distortion of the picture when a digital camera is used to take a high-speed moving object. The device and the method are designed by simulating the principle, the principle of the propeller photographing distortion generation under different conditions can be perfectly restored and demonstrated, the device and the method help people to design a general method for reducing distortion, users can be guided to reasonably set the aperture size and the shutter speed, and the imaging quality of a digital camera for photographing fast objects is improved.

Meanwhile, the propeller distortion display can be designed into a scientific exhibit to show the distortion principle of the propeller of the airplane in a digital photo to the public; through the experience of the public in-person operation, the understanding of the spiral rotating motion and the uniform-speed movement of the shutter is deepened, and the reason that the propeller of the airplane is distorted in the electronic photo is understood. Is helpful for improving scientific interest of people.

The beneficial effects of the invention are: the structure is reasonable, the manufacture and the popularization are convenient, and the principle demonstration is clear and clear; the application is simple in use method, people in different age groups can use the interactive teaching device quickly, and the interactive teaching device can be used for teaching through lively activities.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a cross-sectional view of fig. 1 of the present invention.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

As shown in fig. 1 and fig. 2, a propeller photographing distortion simulation device adopts an organic glass base 1 provided with a groove 2 with the length of 300mm, the width of 210mm and the depth of 10mm, an A4 paper 3 used for simulating a photosensitive element can be exactly placed on the bottom surface of the groove 2, a drawing plate 4 is placed on the A4 paper 3, a long hole groove 5 is arranged on the drawing plate 4, and the length of the drawing plate at two sides of the long hole groove 5 is larger than the diameter of a propeller 6 in the moving direction of the drawing plate 4; the drawing plate 4 is pulled, the long hole slot 5 can move along with the drawing plate to simulate an electronic pull-down shutter release, a propeller 6 is arranged above the drawing plate 4, the propeller 6 is detachably fixed on the base 1, and the outer edge of the bottom of each blade of the propeller 6 is connected with a soft cloth 7, so that the soft cloth 7 absorbs ink; at this moment, one person can rotate the propeller 6 at the uniform speed, the other person pulls the drawing plate 4 at the uniform speed, and when the soft cloth 7 sweeps the overlong hole slot 5, traces can be left on the A4 paper 3, after the long hole slot 5 is separated from the rotating range of the propeller 6, the propeller 6 and the drawing plate 4 can be stopped, the propeller 6 and the drawing plate 4 are taken down, the A4 paper 3 is taken out, and ink traces on the A4 paper 3 are the propeller photographing distortion photos obtained by the current simulation.

The embodiment can be used in the popularization of teaching or science education, and is helpful for improving the interest of students and enhancing the understanding through interactive operation with the students.

Example 2

The structure is basically the same as that of the embodiment 1, the difference is that the propeller 6 and the drawing plate 4 can be driven by a speed regulating motor, the speed control is stable and accurate, in addition, the adjustment is convenient, the relationship between the rotation period of the propeller 6 and the drawing speed of the drawing plate 4 is conveniently verified theoretically, and the difference of the simulated propeller photographing distortion photos generated in different relationships is suitable for more rigorous occasions such as scientific exhibition and the like.

The technical solution of the present invention is not limited to the limitations of the above specific embodiments, and all technical modifications made according to the technical solution of the present invention fall within the protection scope of the present invention.

Claims

1. The use method of the propeller photographing distortion simulation device comprises a propeller, and is characterized in that: the propeller photographing distortion simulation device further comprises a base, wherein a rectangular groove is formed in the base, a drawable drawing plate is arranged at the bottom of the groove, a long hole groove perpendicular to the drawing direction is formed in the middle of the drawing plate, the propeller is erected on the groove, the bottom of each propeller blade is close to the upper surface of the drawing plate, the moving area of the long hole groove covers the forward projection area of the propeller, soft cloth is connected to the outer edge of the bottom of each propeller blade, and the long hole groove is located in the drawing direction;

the using method of the propeller photographing distortion simulation device comprises the following steps:

step 2), soaking a water-based dye on the soft cloth;

step 4), rotating the propeller at a constant speed and drawing the pulling plate outwards at a constant speed, wherein the soft cloth below the propeller can be swept into the long hole groove when passing through the long hole groove and leaves a trace on the paper;

2. The use method of the propeller photographing distortion simulation device according to claim 1, wherein the propeller photographing distortion simulation device comprises the following steps: the groove penetrates through one side edge or two side edges of the base in the moving direction of the drawing plate.

3. The use method of the propeller photographing distortion simulation device according to claim 1, wherein the propeller photographing distortion simulation device comprises the following steps: the paper is white paper, and the water-based dye is ink.