WO2019131583A1 - Particle capturer and rotorcraft comprising same - Google Patents

Abstract

[Problem] To provide a particle capture technology that makes it possible to maintain airflow efficiency. [Solution] This particle capturer comprises: an airflow generation means that generates an airflow; and a capture means that captures prescribed particles. The capture means is provided to at least the surface of the airflow generation means. The particle capturer is configured such that the capture means captures at least particles included in the airflow during periodic operation of the airflow generation means, and said configuration prevents the problems that arise in air purifiers that use a filter or the like. Furthermore, rotorcraft that employ this particle capturer at a propeller can capture airborne particles during flight.

Description

Particle capture device and rotary wing aircraft equipped with the same

The present invention relates to a particle trap and a rotary wing equipped with the same.

Conventionally, various air cleaners using a fan and a filter are known. According to these principles, air is forced into a filter using a fan and passed through the filter to trap particulate matter in the air, aerosol particles, and the like in the filter to clean the air. An air purifier that is usually used is of a type in which a fan and a filter are completely separated and a fan applies air to the filter (for example, see Patent Document 1).

As another method, air cleaners and humidifiers have been proposed in which the filter has both the impeller blade and filter functions by bending the filter in a wave shape and rotating the filter itself (eg, for example) See Patent Document 2)

JP, 2009-202051, A JP 2001-120933 A

The above-described air purifiers are all configured to remove particulate matter and aerosol particles in the air by filtering the air flow generated by the blowing means with a filter. Therefore, not only a load is generated on the blowing means, but also the blowing efficiency is deteriorated as particles are captured by the filter.

Then, an object of the present invention is to provide the particle capture technology which can maintain blowing efficiency.

According to the invention
Air flow generating means for generating air flow;
And a capturing means for capturing predetermined particles.
The capturing means is provided on at least a surface of the air flow generating means,
When the air flow generation means periodically moves, at least particles contained in the air flow are configured to be captured by the capture means.
A particle trap is obtained.

According to the present invention, it is possible to provide a particle capture technology capable of maintaining the blowing efficiency.

It is an image figure which represents notionally the function of the capture means used for the particle capture device by embodiment of this invention. It is an image figure which shows the other example of the capture means of FIG. It is a figure which shows the propeller (rotor blade) provided with the capture means of FIG. FIG. 4A is a cross-sectional view of the propeller of FIG. 3 taken along the line A-A '. FIG.4 (b) is a figure which shows the cross section of the modification of the propeller of FIG. It is a figure which shows the propeller which stuck the sheet-like capture | acquisition means by this Embodiment to the normal propeller. It is an image figure of the air purification system using the rotary wing aircraft provided with the propeller of FIG. It is an image figure which shows the state which attached the detection means to the capture means of FIG. It is a figure which shows the functional block of the rotary wing aircraft of FIG. FIG. 2 shows a particle trap which further comprises detection means for detecting (analyzing) information about particles captured by the capture means of FIG. 1; It is a photograph which shows the propeller and collection means which were used for the aerosol collection experiment by a present Example. It is an electron micrograph of the collection means of FIG.

The contents of the embodiment of the present invention will be listed and described. A particle trap according to an embodiment of the present invention and a rotorcraft equipped with the same have the following configuration.
[Item 1]
Air flow generating means for generating air flow;
And a capturing means for capturing predetermined particles.
The capturing means is provided on at least a surface of the air flow generating means,
When the air flow generation means periodically moves, at least particles contained in the air flow are configured to be captured by the capture means.
Particle trap.
[Item 2]
A particle trap according to claim 1, wherein
A particle trap, wherein the capture means is configured to selectively capture predetermined particles.
[Item 3]
The particle trap according to claim 1 or 2, wherein
The air flow generating means is a propeller,
The capturing means is a particle capturing device provided on the surface of the propeller.
[Item 4]
A particle trap according to claim 3, wherein
The capturing means is a particle capturing device that is a capturing structure of a surface of the propeller.
[Item 5]
A rotorcraft provided with the particle capturer according to claim 4.
[Item 6]
The rotorcraft according to claim 5, wherein
Rotorcraft [Item 7] further comprising means for analyzing information on the particles captured by the propeller
A capturing means for capturing predetermined particles formed in a sheet shape, comprising:
It further comprises an adhesive means for attaching to at least the air flow generating means,
Capture means.

<Details of Embodiment>
Hereinafter, a particle trap according to an embodiment of the present invention and a rotary wing equipped with the same will be described with reference to the drawings.

<Overview>
A particle trap, according to an embodiment of the present invention, has a structure that captures specific particles present in the air. Details of the structure will be described later. Moreover, a rotary wing aircraft makes a specific particle which exists in air capture on the said rotary blade by utilizing a particle capturer for the rotary blade.

The above-mentioned rotary wing aircraft is called Drone, Multicopter, Unmanned aerial vehicle (UAV), remote piloted aircraft systems (RPAS), or Unmanned Aircraft Systems (UAS). There is something to be done.

Furthermore, although the particle trap according to the present invention is processed into a propeller shape and employed in the above-described rotary wing aircraft, any particle trap may be employed as long as it has a propeller shape. Furthermore, the present invention is applicable to any member that generates an air flow.

<Particle trap>
FIG. 1 is a view schematically showing the cross-sectional structure of the particle capturing device according to the present embodiment. As shown, the particle trap comprises capture means and air flow generation means.

The air flow generating means is a base of a propeller attached to the rotary wing aircraft. The equipment is mainly made of resin or the like, but may be made of other materials. Also, the substrate may be a single material, or may be a plywood-like one obtained by combining a plurality of substrates.

As can be seen by comparing (a) and (b) in FIG. 1, the capturing means is present on the surface of the air flow generating means, and has particles of a predetermined physical or chemical structure to capture particles on the surface. It is

The arrows in the figure indicate the direction of the air flow generated by the air flow generating means. That is, it shows the flow of the air flow generated by the rotation of the propeller. In the present embodiment, when the propeller rotates, an air flow is generated in the lower direction of the drawing (in other words, an upward thrust is generated in the rotorcraft having the propeller).

The air flow generating means and the catching means may be the same material or may be other materials. In this case, the capturing means is configured to be coated on the surface with the air flow generating means as a substrate.

In addition, the capturing means may have a structure (for example, having a predetermined unevenness or the like) suitable for capturing the specific particles in the physical or chemical structure of the surface, or the surface May have a structure suitable for attracting specific particles electrostatically.

(A) of FIG. 2 is a figure which shows the other example of a particle capturing device. The illustrated particle trap has capture means for selectively capturing only particle A out of a plurality of different particles A and particles B.

(B) of FIG. 2 is a view schematically showing a surface structure for selectively capturing only the particle A. As shown in FIG. As shown, the capture means has a shape suitable for capturing particle A, while having a shape not suitable for capturing particle B.

According to this structure, when the air flow is generated by the rotation of the propeller, only the particle A can be selectively captured by the capturing means.

FIG. 3 is a view showing a propeller 10 as a particle trap. The propeller 10 includes a shaft portion 11 which is a rotation shaft, and a blade portion 12 which generates a thrust (lifting force) by rotation. The propeller 10 (at least the blade portion 12) according to the present embodiment is formed by the catching means 20.

FIG. 4 is a cross-sectional view taken along the line A-A 'of FIG. As shown, capture means 20 are formed on the base of propeller 10.

FIG. 5 shows a propeller 10 'as a particle trap. Similar to the propeller 10 of FIG. 3, the propeller 10 ′ includes a shaft 11 that is a rotation shaft, and a blade 12 that generates thrust (lift) by rotation. The propeller 10 'according to the present embodiment is attached with a capturing means 20' formed in a seal shape.

The capture means 20 ′ formed in a seal shape includes a capture material formed in a sheet shape and an adhesive portion as a means for attaching to the blade portion 12. The means for attaching to the blade portion 12 may use other means.

FIG. 6 is an image diagram showing how particles are captured by the rotated propeller 10. When the propeller 10 rotates, an air flow is generated in the downward direction W, and an upward thrust (lift is exerted) on the propeller 10 ′. This allows the rotorcraft (not shown) to ascend and hover in the air (hovering) It becomes.

FIG. 7 is an image diagram showing the propeller 10 or 10 'of FIG. 3 or FIG. 5 mounted on a rotary wing and placed in the atmosphere. By hovering in the air, the rotary wing aircraft exhibits a function of capturing particulate matter and aerosol particles in the atmosphere.

As shown in the drawing, a plurality of rotary wing aircraft are arranged in the upper sky and communicate with each other to control the positional relationship between the respective aircraft. Note that, if necessary, management may be performed by a management control system disposed on the ground or in combination.

The above-mentioned rotary wing aircraft mainly refers to those that move in the air, but also include, for example, rotary wing aircraft having a combined function of land use, underwater use, and the like.

The rotorcraft described above has, for example, the functional blocks shown in FIG. The functional block in FIG. 8 is the minimum reference configuration.

The flight controller can include one or more processors, such as a programmable processor (e.g., a central processing unit (CPU)).

The flight controller has a memory (not shown) and can access the memory. The memory stores logic, code, and / or program instructions that can be executed by the flight controller to perform one or more steps.

The memory may include, for example, a removable medium such as an SD card or random access memory (RAM) or an external storage device. Data obtained from cameras and sensors may be directly transmitted and stored in a memory. For example, still image / moving image data captured by a camera or the like is recorded in the built-in memory or the external memory.

The flight controller includes a control module configured to control the state of the rotorcraft. For example, the control module may adjust the spatial arrangement, velocity, and / or acceleration of a rotorcraft having six degrees of freedom (translational motion x, y and z, and rotational motion θ _x , θ _y and θ _z ) Control the propulsion mechanism (motor etc.) of the rotorcraft. The control module can control one or more of the mounting unit and the state of the sensors.

The flight controller can be in communication with a transceiver configured to transmit and / or receive data from one or more external devices (e.g., a terminal, a display, or other remote controller). The transceiver may use any suitable communication means, such as wired communication or wireless communication.

For example, the transmitting and receiving unit uses one or more of a local area network (LAN), wide area network (WAN), infrared, wireless, WiFi, point-to-point (P2P) network, telecommunications network, cloud communication, etc. be able to.

The transmission / reception unit can transmit and / or receive one or more of data acquired by sensors, processing results generated by the flight controller, predetermined control data, user commands from a terminal or a remote controller, etc. .

The sensors according to the present embodiment include an inertial sensor (acceleration sensor, gyro sensor), a GPS sensor, a proximity sensor (for example, a rider), a vision / image sensor (for example, a camera) and other physical sensors according to the application. May be included. Furthermore, chemical sensors such as ion sensors, bioaffinity sensors, gas sensors, other electrochemical sensors, optical sensors, etc. may be included.

The rotorcraft of the present invention can be used as an industrial rotorcraft for surveys, surveys, observations and the like. In addition, the rotary wing aircraft of the present invention can be used in the aircraft related industry such as multicopter drone etc. Furthermore, the present invention is suitably used also as a rotary wing aircraft for aerial photography equipped with a camera etc. In addition, it can be used in various industries such as security, agriculture, and infrastructure monitoring.

FIG. 9 shows a particle trap which further comprises detection means for detecting (analyzing) information about the particles A captured by the capture means according to the invention. The detecting means detects the particle A captured (captured) by the capturing means.

The detection means may be a specific material, reagent, or other detection means that reacts with the particle A. Also, the detection means need not necessarily be provided on the capture means, and may be separate.

(Example)
Subsequently, in order to verify the effect of the particle adsorption according to the present invention, an aerosol collection experiment was performed. The outline of the procedure of the experiment is as follows.

As shown in FIG. 10, hydrophobic Durapore F was attached to propeller P with a double-sided tape. The hydrophobic Durapore used in this example is a membrane filter made of polyvinylidene fluoride.

A propeller P was connected to the motor for rotation and was exposed to aerosol standard particles during rotation. Aerosol standard particles are aqueous dispersions of spherical polystyrene particles. The particle size is 0.1 μm ± 0.003 μm.

As a result of microscopic observation after exposure, a small number of particles were confirmed together with the filter F, and a 0.3 mg weight change was confirmed by an electronic balance. As shown in FIG. 11A, white small particles in the figure can be seen. Further, as shown in FIG. 11B, it can be seen that particles of about 0.1 μm are adsorbed.

The embodiments described above are merely examples for facilitating the understanding of the present invention, and are not intended to limit and interpret the present invention. It goes without saying that the present invention can be modified and improved without departing from the gist thereof, and that the present invention includes equivalents thereof.

10, 10 'propeller 11 shaft 12 blade 20, 20' capture means

Claims (7)

Air flow generating means for generating air flow;
And a capturing means for capturing predetermined particles.
The capturing means is provided on at least a surface of the air flow generating means,
When the air flow generation means periodically moves, at least particles contained in the air flow are configured to be captured by the capture means.
Particle trap. A particle trap according to claim 1, wherein
A particle trap, wherein the capture means is configured to selectively capture predetermined particles. The particle trap according to claim 1 or 2, wherein
The air flow generating means is a propeller,
The capturing means is a particle capturing device provided on the surface of the propeller. A particle trap according to claim 3, wherein
The capturing means is a particle capturing device that is a capturing structure of a surface of the propeller. A rotorcraft provided with the particle capturer according to claim 4. The rotorcraft according to claim 5, wherein
A rotorcraft further comprising means for analyzing information about the particles captured by the propeller. A capturing means for capturing predetermined particles formed in a sheet shape, comprising:
It further comprises an adhesive means for attaching to at least the air flow generating means,
Capture means.

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