Shock wave generation and observation device

Abstract

The utility model provides a shock wave generating and observing device which comprises a shock wave generating unit, the shock wave generating unit comprises an air source and an experimental sample, the air source is connected with an air blowing pipe, the air blowing pipe is provided with an on-off valve, and the experimental sample is arranged at an air blowing port of the air blowing pipe; the shock wave observation unit comprises a one-way light source, a light ray reflection module and an image acquisition module, light rays emitted by the one-way light source can be reflected to the image acquisition module through the light ray reflection module after passing through the experimental sample, and the image acquisition module is used for acquiring image information of the received light rays. The shock wave generation and observation device can realize the generation and observation of shock waves under a normal temperature condition, is simple in structure, is not limited by sites, can operate in a common classroom, can synchronously and vividly display aerodynamic principles and phenomena taught in a theory classroom to students through experiments, and improves the interestingness and interactivity of teaching.

Description

Technical Field

[0001] The utility model relates to the technical field of aerospace, in particular to a shock wave generation and observation device. Background Art

[0002] The study of aerodynamics plays an important role in the development of the aviation field. Almost all aviation equipment inevitably needs to use scientific theories related to aerodynamics. The mastery of knowledge related to shock waves in aerodynamics (i.e., strong compression waves in supersonic gases) is very important for the design of supersonic aircraft. However, shock wave generation involves a lot of formulas, and the related teaching is quite boring, uninteresting, and abstract, which makes it difficult to arouse students' interest and limits the improvement of aerodynamic teaching efficiency. Summary of the invention

[0003] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a shock wave generation and observation device to solve the problems existing in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose and other related purposes, the utility model provides a shock wave generation and observation device, including a shock wave generation unit, the shock wave generation unit includes an air source and an experimental sample, wherein the air source is connected to an air blowing pipe, the air blowing pipe is provided with an on-off valve, and the experimental sample is arranged at the air blowing port of the air blowing pipe; a shock wave observation unit, the shock wave observation unit includes a unidirectional light source, a light reflection module and an image acquisition module, the light emitted by the unidirectional light source passes through the experimental sample and then can be reflected to the image acquisition module through the light reflection module, and the image acquisition module is used to obtain image information of the received light.

[0005] Preferably, the light reflection module includes a first concave mirror and a second concave mirror, the first concave mirror and the second concave mirror are arranged at an interval, the experimental sample is arranged between the first concave mirror and the second concave mirror, the unidirectional light source is arranged at the focal position of the first concave mirror, and the image acquisition module is arranged at the focal position of the second concave mirror, and the light emitted by the unidirectional light source is reflected by the first concave mirror, then passes through the experimental sample, and finally reflected by the second concave mirror to the image acquisition module.

[0006] Preferably, the image acquisition module is an industrial camera.

[0007] Preferably, the air blowing pipe includes a hose and a hard nozzle, the first end of the hose is connected to the air source, the second end of the hose is connected to the first end of the hard nozzle, the second end of the hard nozzle forms the air blowing port, and the on-off valve is arranged on the hard nozzle.

[0008] Preferably, the gas source is an air compressor.

[0009] Preferably, the focal lengths of the first concave mirror and the second concave mirror are 1m to 2m.

[0010] Preferably, the unidirectional light source is an LED flash of a smartphone, the image acquisition module is a camera of the smartphone, the light reflection module is a concave mirror, the smartphone and the concave mirror are spaced apart, and the experimental sample is arranged between the smartphone and the concave mirror.

[0011] As described above, a shock wave generation and observation device of the utility model has the following beneficial effects: when in use, the gas source is turned on so that the air blowing tube sprays high-pressure gas to the experimental sample, and the air density around the experimental sample will change. According to the principle that different air densities will cause different refractive indices of light in the flow field, the light emitted by the unidirectional light source will undergo different degrees of refraction after passing through the experimental sample and the surrounding area of ​​the experimental sample, that is, a wavy light pattern will be generated. Then, the light passing through the experimental sample and the surrounding area will be reflected to the image acquisition module through the light reflection module. The image acquisition module obtains the image information of the received light, and the wavy image, that is, the shape of the shock wave, will be displayed on the image information. Compared with the prior art, the shock wave generation and observation device of the utility model can realize the generation and observation of shock waves under normal temperature conditions, and has a simple structure, is not restricted by the site, and can be operated in an ordinary classroom, thereby being able to meet the requirements of synchronously and vividly displaying the aerodynamic principles and phenomena taught in the theoretical classroom to students through experiments, thereby improving the fun and interactivity of teaching and improving the teaching efficiency of aerodynamics. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 Shown is a structural schematic diagram of Embodiment 1 of the shock wave generation and observation device provided by the present invention.

[0013] Figure 2 Shown is a structural schematic diagram of a second embodiment of the shock wave generation and observation device provided by the present utility model.

[0014] Description of reference numerals:

[0015] 10 Air source

[0016] 11. Blowpipe

[0017] 110 On / Off Valve

[0018] 111 Hose

[0019] 112 Hard Nozzle

[0020] 20 Unidirectional light source

[0021] 31 First concave mirror

[0022] 32 Second concave mirror

[0023] 40 Image acquisition module

[0024] 100 experimental samples

[0025] 200 Smartphone

[0026] 300 Concave Mirror DETAILED DESCRIPTION

[0027] The following is an explanation of the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0028] In the description of the present utility model, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a mechanical connection, it can be an electrical connection, it can be a direct connection, it can be connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used in the present invention to indicate the orientation or position relationship is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0030] See also Figure 1 to Figure 2It should be noted that the illustrations provided in this embodiment are only used to schematically illustrate the basic concept of the utility model, and the drawings only show the components related to the utility model rather than the number, shape and size of the components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0031] The utility model provides a shock wave generation and observation device, such as Figure 1 As shown, the shock wave generation and observation device includes a shock wave generation unit and a shock wave observation unit, wherein the shock wave generation unit includes a gas source 10 and an experimental sample 100. Specifically, the gas source 10 is connected to a blow pipe 11, and the blow pipe 11 is provided with an on-off valve 110. The experimental sample 100 is arranged at the blow port of the blow pipe 11; the shock wave observation unit includes a unidirectional light source 20, a light reflection module and an image acquisition module 40. Specifically, the light emitted by the unidirectional light source 20 passes through the experimental sample 100, and then can be reflected to the image acquisition module 40 through the light reflection module. The image acquisition module 40 is used to obtain image information of the received light.

[0032] When the shock wave generation and observation device of the utility model is in use, the gas source 10 is turned on, so that the blowing tube 11 sprays high-pressure gas (supersonic airflow) toward the experimental sample 100, and the air density around the experimental sample 100 will change. According to the principle that different air densities will lead to different refractive indices of light in the flow field, the light emitted by the unidirectional light source 20 will be refracted to different degrees after passing through the experimental sample 100 and the surrounding area of ​​the experimental sample, that is, a wavy light pattern will be generated. The light passing through the experimental sample and its surrounding area is then reflected to the image acquisition module 40 through the light reflection module. The image acquisition module 40 obtains the image information of the received light, and the wavy image, that is, the shape of the shock wave, will be displayed on the image information. Compared with the prior art, the shock wave generation and observation device of the utility model can realize the generation and observation of shock waves under normal temperature conditions, and has a simple structure, is not restricted by the site, and can be operated in an ordinary classroom. It can meet the needs of synchronously and vividly demonstrating the aerodynamic principles and phenomena taught in the theoretical classroom to students through experiments, thereby improving the interest and interactivity of teaching and improving the teaching efficiency of aerodynamics.

[0033] Embodiment 1

[0034] As a preferred example, Figure 1As shown, in the first embodiment, the light reflection module includes a first concave mirror 31 and a second concave mirror 32, the first concave mirror 31 and the second concave mirror 32 are arranged at intervals, the unidirectional light source 20 is arranged at the focal position of the first concave mirror 31, the image acquisition module 40 is arranged at the focal position of the second concave mirror 32, the experimental sample 100 is arranged between the first concave mirror 31 and the second concave mirror 32, and the light emitted by the unidirectional light source 20 is emitted by the first concave mirror 31 and then passes through the experimental sample 100, and then is reflected by the second concave mirror 32 to the image acquisition module 40. According to the principle of the concave mirror, when the light source is at the focal point of the concave mirror, the light emitted by the light source will form a parallel light beam after being reflected by the concave mirror. Therefore, through this structural design, that is, by setting the unidirectional light source 20 at the focal position of the first concave mirror 31, the light emitted by the unidirectional light source 20 first passes through the first concave mirror 31 and then is emitted to the experimental sample 100, so that the light emitted to the experimental sample 100 is parallel light, thereby improving the effect of the experiment. And through the setting of the second concave mirror 32, the light passing through the experimental sample 100 will be all collected in the image acquisition module 40 after being reflected by the second concave mirror 32, thereby improving the collection of light, further improving the experimental effect, and further improving the observation effect of the shock wave.

[0035] Specifically, in this embodiment, the image acquisition module 40 is an industrial camera; the air source 10 is preferably an air compressor, which has a simple structure and is easy to set up. When in use, all experimental devices, namely the first concave mirror 31, the second concave mirror 32, the experimental sample 100, the unidirectional light source 20 and the industrial camera can be placed on a desktop or a laboratory table. When in use, the air compressor can compress the air to produce high-pressure gas when the power is turned on. Specifically, the air storage pressure of the air compressor can be 0.8-1.8MPa.

[0036] Specifically, when in use, the experimental sample 100 can be placed on a laboratory table or desktop through a bracket, and experimental samples of different shapes can be replaced according to experimental requirements. For example, the experimental sample can be in the shape of a triangle, square, pentagon or wing.

[0037] Preferably, considering the experimental accuracy and the limitation of the site size, in the first embodiment, the focal lengths of the first concave mirror 31 and the second concave mirror 32 are 1 m to 2 m.

[0038] Preferably, Figure 1 As shown, in the first embodiment, the air blowing pipe 11 includes a hose 111 and a hard nozzle 112, the first end of the hose 111 is connected to the air source 10, i.e., the air compressor, the second end of the hose 111 is connected to the first end of the hard nozzle 112, the second end of the hard nozzle 112 forms the air blowing port, and the on-off valve 110 is arranged on the hard nozzle 112.

[0039] Embodiment 2

[0040] like Figure 2 As shown, in the second embodiment, the unidirectional power supply is the LED flash of the smart phone 200, the image acquisition module is the camera of the smart phone 200, the light reflection module is the concave mirror 300, the smart phone 200 and the concave mirror 300 are arranged at intervals, and the experimental sample 100 is arranged between the smart phone 200 and the concave mirror 300. When in use, the LED flash of the smart phone 200 emits light, the light passes through the experimental sample 100 and then reflects back through the concave mirror 300, and the camera of the smart phone 200 obtains the image information of the reflected light. Compared with the above-mentioned first embodiment, the overall structure of the second embodiment is simpler and easier to operate. It can be understood that the smart phones described in the second embodiment are all included as long as they have LED flash and camera.

[0041] In summary, the shock wave generation and observation device of the utility model can realize the functions of shock wave generation and shock wave observation under normal temperature conditions. At the same time, the overall structure is simple and lightweight, and each part is assembled separately, and no ready-made stand is required. Therefore, the use of the device is not limited by the site, and it can be operated in an ordinary classroom, and the aerodynamic principles and phenomena taught in the theoretical classroom can be synchronously and vividly demonstrated to students through experiments, thereby improving the interest and interactivity of teaching and improving the teaching efficiency of aerodynamics. The shock wave generation and observation device of the utility model can be used in theoretical teaching, training practice, popular science demonstration and other fields. Therefore, the utility model effectively overcomes the various shortcomings of the prior art and has a high industrial utilization value.

[0042] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A shock wave generation and observation device, characterized in that: include: A shock wave generating unit, the shock wave generating unit comprising an air source and an experimental sample, wherein the air source is connected to an air blowing pipe, the air blowing pipe is provided with an on-off valve, and the experimental sample is arranged at the air blowing port of the air blowing pipe; A shock wave observation unit, the shock wave observation unit includes a unidirectional light source, a light reflection module and an image acquisition module. The light emitted by the unidirectional light source passes through the experimental sample and then can be reflected to the image acquisition module through the light reflection module. The image acquisition module is used to obtain image information of the received light.

2. A shock wave generation and observation device according to claim 1, characterized in that: The light reflection module includes a first concave mirror and a second concave mirror, the first concave mirror and the second concave mirror are arranged at an interval, the experimental sample is arranged between the first concave mirror and the second concave mirror, the unidirectional light source is arranged at the focal position of the first concave mirror, and the image acquisition module is arranged at the focal position of the second concave mirror. The light emitted by the unidirectional light source is reflected by the first concave mirror, then passes through the experimental sample, and finally reflected by the second concave mirror to the image acquisition module.

3. A shock wave generation and observation device according to claim 1 or 2, characterized in that: The image acquisition module is an industrial camera.

4. A shock wave generation and observation device according to claim 1, characterized in that: The air blowing pipe includes a hose and a hard nozzle, the first end of the hose is connected to the air source, the second end of the hose is connected to the first end of the hard nozzle, the second end of the hard nozzle forms the air blowing port, and the on-off valve is arranged on the hard nozzle.

5. The shock wave generation and observation device according to claim 1, characterized in that: The gas source is an air compressor.

6. A shock wave generation and observation device according to claim 2, characterized in that: The focal lengths of the first concave mirror and the second concave mirror are 1m to 2m.

7. A shock wave generation and observation device according to claim 1, characterized in that: The unidirectional light source is an LED flash of a smartphone, the image acquisition module is a camera of the smartphone, the light reflection module is a concave mirror, the smartphone and the concave mirror are spaced apart, and the experimental sample is arranged between the smartphone and the concave mirror.

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