KR102141531B1 - Apparatus And Method For Detecting Marine Red Tide - Google Patents

Abstract

The present invention relates to a red tide detection device and a detection method. More particularly, the present invention relates to a red tide detection device and a detection method. The red tide detection device comprises: a case (100) having an empty inside and a predetermined shape; a lighting unit (200) accommodated in the case (100) to irradiating a wavelength of a predetermined region downward; a camera (300) accommodated in the case (100) to photograph a lower side; and a controller (500) for controlling the lighting unit (200) and the camera (300).

Description

Red tide detection device and detection method {Apparatus And Method For Detecting Marine Red Tide}

The present invention relates to a red tide detection device and a detection method, and more specifically, a red tide detection device and a red tide detection device capable of accurately determining the occurrence and amount of red tide using multi-wavelength irradiation and a flow visualization technique (PIV, Particle Image Velocimetry). It relates to a detection method.

The dictionary definition of red tide refers to the phenomenon in which plankton suddenly reproduces in huge numbers and changes the color of the sea, rivers, canals, and lakes. Planktons causing red tide include phytoplanktons such as diatoms and dinoflagellates, cyanobacteria and protozoan noctilucas and mesodiniums.

The major causes of this red tide are so-called eutrophication, a phenomenon in which organic substances containing various detergents flow into the water system, rising water temperature due to temperature changes, and stagnation of water that is not circulating well. .

When red tide occurs, the dissolved oxygen in the water decreases primarily, and fish and shellfish breathing using oxygen in the water are suffocated and killed, and in some cases, plankton is stuck in the gills of the fish, causing physical suffocation. In addition, there are toxic algae among the planktons that cause red tide, which can lead to death, resulting in fatal losses to fish and fish farming.

When the red tide occurs in this way, it not only destroys the aquatic ecosystem, but also causes a great economic loss. Therefore, it is necessary to accurately and promptly check whether the red tide has occurred. Should be.

In relation to red tide detection, Korean Patent Publication No. 2016-0076626 identifies a digital red tide detection sensor configured to detect a red tide in the sea and output a corresponding digital detection signal, and a digital detection signal output from a digital red tide detection sensor. Thus, a red tide detection system in a sea including a red tide detection control device configured to transmit red tide information to a maritime base station when the digital detection signal reaches a predetermined level or more is disclosed. However, in the prior art, since a digital signal is generated by generating a spike pulse, projecting it into the sea, and converting the reflected signal back to A/D to generate a digital detection signal based on this, it is determined whether or not red tide has occurred. There is a problem in that it is difficult to make accurate judgments due to the large influence.

Another document, Korean Patent Publication No. 2010-0137938, includes generating an acoustic signal from an ultrasonic acoustic sensor, receiving a reflected signal received for the acoustic signal, and whether red tide is generated or not from the received signal. Disclosed is a method for detecting harmful red tide using an ultrasonic acoustic sensor that includes measuring the intensity.

However, according to the prior literature, a difference occurs in the received signal reflected according to the activity of the red tide, and particularly, when a large amount of various floating substances is contained in the water, there is a problem that they are not properly received.

Korean Patent Publication No. 2016-0076626 Korean Patent Publication No. 2010-0137938

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a red tide detection device and a detection method capable of accurately determining whether red tide has occurred or not.

Red tide detection device of the present invention for solving the above problems, the inside is empty and has a predetermined shape case 100; An illumination unit 200 accommodated inside the case 100 and irradiating a wavelength of a predetermined region downward; A camera 300 accommodated inside the case 100 to photograph the downward direction; And it characterized in that it comprises a control unit 500 for controlling the lighting unit 200 and the camera 300.

In addition, in the red tide detection device of the present invention, the upper part of the case 100 is convex upward, and the lower part is characterized in that it is a flat plane.

In addition, in the red tide detection device of the present invention, a transparent lighting window 400 is further provided under the case 100.

In addition, in the red tide detection device of the present invention, the lighting unit 200 is characterized by consisting of a first lighting unit 210 and the second lighting unit 220.

In addition, in the red tide detection device of the present invention, the illumination unit 200 irradiates a green wavelength of 500 to 550 nm in the first illumination unit 210, and irradiates a red wavelength of 630 to 680 nm in the second illumination unit 220. It is characterized by.

In addition, in the red tide detection device of the present invention, the lighting unit 200, the lens of the camera 300 is located in the center, the first lighting unit 210 and the first lighting unit 210 in a shape surrounding the lens It characterized in that the second lighting unit 220 is located.

In addition, in the red tide detection device of the present invention, the first cable 230 connecting the lighting unit 200 and the control unit 500, and the second cable 320 connecting the camera 300 and the control unit 500 It characterized in that it further comprises.

In addition, in the red tide detection device of the present invention, the case 100, the first cable 230 and the second cable 320 is provided with a case connector 110 through which is further provided.

In addition, in the red tide detection device of the present invention, the case connector 110, the first connector 111 fixed to the upper portion of the case 100, and the second connector 112 detachably coupled to the first connector 111 It is characterized by consisting of.

In addition, in the red tide detection device of the present invention, a transparent illumination window 400 under the case 100; A first cable 230 connecting the lighting unit 200 and the control unit 500; A second cable 320 connecting the camera 300 and the control unit 500; And the upper portion of the case 100 is convex upward, the first connector 111 and the first fixed to the upper portion of the case 100 so that the first cable 230 and the second cable 320 can pass through Further comprising a case connector 110 made of a second connector 112 detachably coupled to the connector 111, the lighting unit 200, the lens of the camera 300 is located in the center, surrounding the lens Characterized in that the first illumination unit 210 for irradiating green wavelengths of 500 to 550 nm in shape, and the second illumination unit 220 for irradiating red wavelengths of 630 to 680 nm in a shape surrounding the first illumination unit 210 are located. Is done.

The red tide detection method of the present invention comprises the steps of: placing a red tide detection device at a predetermined depth in water; Photographing while irradiating a wavelength of a predetermined region; And analyzing the spectrum difference from the absorption spectrum and the action spectrum.

The red tide detection method of the present invention comprises the steps of: placing a red tide detection device at a predetermined depth in water; Photographing while irradiating a wavelength of a predetermined region; And analyzing the photographed image information.

According to the red tide detection device and method of the present invention, an illumination unit that irradiates multiple wavelengths inside a sealed case and a camera that works in conjunction with this are provided, so that the structure of the device is very simple and can be manufactured at low cost.

In addition, according to the red tide detection apparatus and method of the present invention, it is advantageous in that accuracy is very high because it is determined whether red tide is generated from spectral difference and turbulent intensity.

1 is a perspective view of a red tide detection device according to a preferred embodiment of the present invention.
FIG. 2 is a plan view of the red tide detection device of FIG. 1 as viewed from below.
3 is a result of checking whether red tide has occurred by applying a red tide detection method according to an embodiment of the present invention.
Figure 4 is a result of confirming whether or not the occurrence of red tide by applying the red tide detection method according to another embodiment of the present invention.

Hereinafter, a red tide detection device according to the present invention will be described with reference to the accompanying drawings.

In this application, the terms “include”, “have” or “have” are intended to indicate that there are features, numbers, steps, elements, parts or combinations thereof described in the specification, but one or more other. It should be understood that features or numbers, steps, actions, components, parts, or combinations thereof are not excluded in advance.

In addition, unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by a person skilled in the art to which the present invention pertains. Terms such as those defined in a dictionary used in general should be interpreted as having meanings consistent with meanings in the context of related technologies, and should not be interpreted as ideal or excessively formal meanings unless explicitly defined in the present application. Does not.

1 is a perspective view of a red tide detection device according to a preferred embodiment of the present invention, and FIG. 2 is a plan view of the red tide detection device of FIG. 1 as viewed from below. Referring to these FIGS. 1 and 2 together, the red tide detection device of the present invention comprises a case 100, a lighting unit 200, a camera 300, a lighting window 400 and a control unit 500.

First, in detail with respect to the case 100, the interior is empty so that the lighting unit 200 and the camera 300 can be accommodated, and the case connector 110 is provided at the top.

Here, it is preferable that the upper part of the case 100 is convex upward and the lower part is a substantially semi-spherical shape, which is intended to increase the reliability of the measurement result by not receiving the maximum resistance to the flow of water. The material of the case 100 is not particularly limited, but may be a plastic material having excellent corrosion prevention and impact resistance.

The case connector 110 located at the upper portion of the case 100 is for drawing out the first cable 230 and the second cable 320 to be described later. Specifically, one side of the first cable 230 is connected to the lighting unit 200, the other side is connected to the control unit 500, one side of the second cable 320 is connected to the camera 300 and the other side is similarly connected to the control unit 500 have.

The case connector 110 provides a passage through which the first cable 230 and the second cable 320 as described above can extend from the inside of the case 100 to the outside, and the first connector 111 and the second connector ( 112).

Here, the first connector 111 is fixed to the upper portion of the case 100, while the second connector 112 can be coupled to the first connector 111 to be detachable by a male and female fastening method or the like. Of course, it is obvious that the first connector 111 and the second connector 112 must maintain airtightness so that seawater or the like does not flow into the case 100.

Although not shown in the drawings, the other ends of the first cable 230 and the second cable 320 are electrically connected to the first connector 111, while the first connector 111 and the second connector 112 are again After being electrically connected, the second connector 112 and the control unit 500 may be electrically connected.

Next, the lighting unit 200 will be described. The lighting unit 200 located in the inner space portion of the case 100 is for generating an absorption spectrum and an action spectrum of a red tide creature.

The lighting unit 200 may be composed of the first lighting unit 210 and the second lighting unit 220, the first lighting unit 210 irradiates a green wavelength of 500 ~ 550nm, the second lighting unit 220 is 630 ~ It is desirable to irradiate a red wavelength of 680 nm.

The reason for irradiating the wavelength of 500 ~ 550nm in the first illumination unit 210 is to induce the reflection intensity of the phytoplankton. In addition, the wavelength of 630 ~ 680nm of the second illumination unit 220 is for illumination of a camera used for measurement, and is intended to take a clear picture by brightening the surroundings when the water depth is deep or when a large amount of phytoplankton multiplies.

Meanwhile, as shown in FIG. 2, the lighting unit 200 is a donut shape surrounding the lens around the lens of the camera 300, the first lighting unit 210, and the second lighting unit 220 in a shape surrounding the first lighting unit 210. ) Are preferably sequentially

That is, the second illumination unit 220 of the red wavelength is located outside the first illumination unit 210 that irradiates the green wavelength, and in particular, the second illumination unit 220 irradiates relatively more wavelengths, which results in a clearer image. It is to secure.

As described above, the lighting unit 200 is connected to one side of the first cable 230, and various signals from the control unit 500 through the first cable 230, for example, whether the light is irradiated, the wavelength of the irradiation Types, etc. are received.

Meanwhile, the lighting unit 200 may be formed of an LED chip for each wavelength, a semiconductor laser, and an optical lens.

The camera 300 accommodated inside the case 100 is for continuously or discontinuously photographing the state of the water while interlocking with the lighting unit 200, and is located in the center of the case 100 as shown in FIG.

Here, the camera 300 may be a color CCD-charged device camera (CCD) including the lens 110 with a fixed focus, but is particularly limited as long as it is a camera capable of converting an image captured in water into an electrical signal. I never do that.

One side of the second cable 320 is connected to the camera 300, and various signals, such as shutter speed and exposure time of the camera, are received from the control unit 500 through the second cable 320. Works.

It is preferable that the lower surface of the case 100 is provided with an illumination window 400 that can be detachably coupled to the case 100. Here, the illumination window 400 is preferably made of a transparent material so that the camera 300 can well photograph the external situation while irradiating the wavelength of the illumination unit 200 to the outside. In particular, taking into account the case that the wavelength may not pass well or the shooting of a clear image may be difficult due to a scratch that may occur during storage or transportation of the device, or a scratch caused by various foreign substances in the water during analysis, only the lighting window 400 It is more preferable to be coupled in a detachable form with the case 100 to be replaced. Of course, it is obvious that the coupling portion of the case 100 and the lighting window 400 must be kept airtight so that external seawater can be prevented from entering the case 100.

Subsequently, the control unit 500 for controlling the lighting unit 200, the camera 300, and the like will be described. The control unit 500 includes a camera control unit 510, a lighting control unit 520, a signal input/output unit 530, a system control unit 540, a synchronization unit unit 550, and a power control unit 560.

Specifically, the camera control unit 510 performs a function of adjusting the shutter speed and exposure time of the camera 300, and the lighting control unit 520 manages the exposure time and operation of the wavelength irradiated by the lighting unit 200. In addition, the signal input/output unit 530 transmits signal information and external commands inside the control unit 500, and the system control unit 540 controls the electric and electronic signals inside the control unit 500 and performs monitoring.

The synchronization device unit 550 generates a synchronization signal to control the camera 300 and lighting, and finally, the power control unit 560 is for supplying or blocking power of the control unit 500.

Of course, the control unit 500 may be located near the site where the case 100 is to be installed, and may additionally connect to a separate control means such as a portable terminal in a wired or wireless manner to transmit various signals or receive data. .

The detection method using the red tide detection device of the present invention having the above configuration will be described.

As an embodiment of the red tide detection method, placing the red tide detection device at a predetermined depth in the water; Photographing while irradiating a wavelength of a predetermined region; And analyzing the spectral difference from the absorption spectrum and the action spectrum.

That is, the case 100 of the present invention in which the lighting unit 200 and the camera 300 are built-in is placed into the sea area where red tide is likely to occur or red tide occurs. Subsequently, when the green wavelength of 500 to 550 nm is irradiated and the surroundings are dark, such as when the depth of water is deep or phytoplankton is proliferating largely, underwater photographs are taken continuously or discontinuously while simultaneously irradiating the red wavelength of 630 to 680 nm.

As a result of this shooting, after the filtering process, the difference between the absorption spectrum and the action spectrum is analyzed, and based on this, whether red tide has occurred or the amount of red tide has been confirmed.

Here, briefly explaining the principle of filtering and analyzing results, a filter that detects the green layer among R, G, and B layers of digital image information of the camera 300 is used, and a filter that detects the level of illumination intensity is used. do. When the level of illumination intensity is detected, a difference in reflection level, that is, a spectrum difference occurs in particles such as phytoplankton and soil. In order to predict the density of phytoplankton, particles are detected through particle center extraction among PTV (Particle Tracking Velocimetry) measurement methods.

As another embodiment of the red tide detection method, the step of placing the red tide detection device at a predetermined depth in water, photographing while irradiating a wavelength in a predetermined area, and image information captured through a flow visualization technique (PIV, Particle Image Velocimetry) It may include the step of analyzing.

That is, the case 100 of the present invention in which the lighting unit 200 and the camera 300 are built-in is placed into the sea area where red tide is likely to occur or red tide occurs. Subsequently, when the green wavelength of 500 to 550 nm is irradiated and the surroundings are dark, such as when the depth of water is deep or phytoplankton is proliferating largely, underwater photographs are taken continuously or discontinuously while simultaneously irradiating the red wavelength of 630 to 680 nm.

As a result of this shooting, that is, by analyzing image information, quantitative speed is measured. Here, the flow visualization technique (PIV, Particle Image Velocimetry) is a method of analyzing the flow field by injecting particles of the same specific gravity as the medium of the flow field, and then analyzing the motion of the particles using the visualization technique, more Detailed description will be omitted.

The present invention will be described in more detail through the following examples. These examples are only for illustrating the present invention, it will be apparent to those skilled in the art that the scope of the present invention is not to be construed as limited by these examples.

Example 1

The area where the red tide organisms occurred and the water body with only floating matter having a particle size (20 to 30 um) similar to that of the red tide organism were selected as the test area.

Subsequently, a red tide detection device with a built-in lighting unit and a camera inside the case was placed in the water of each test area, and then the underwater wavelengths were continuously photographed while irradiating the natural wavelengths (500-550 nm). It was carried out.

As shown in FIG. 3, it can be seen that there is a marked difference between the spectrum obtained from the water body containing the red tide organism and the spectrum obtained from the water body containing only the floating material, and it can be confirmed whether or not the red tide exists.

Example 2

The area where the red tide organisms occurred and the water body with only floating matter having a particle size (20 to 30 um) similar to that of the red tide organism were selected as the test area.

After placing the red tide detection device with built-in lighting unit and camera inside the case into the water of each test area, the underwater wavelengths were continuously photographed while investigating the natural wavelength (500~532nm). Velocity vectors and turbulent intensities were analyzed.

As shown in FIG. 4, it can be confirmed that while the turbulence intensity obtained from the water body where the red tide organisms occurred was large, the turbulence intensity obtained from the water body containing only floating matter was weak. In the case of red tide organisms, autonomous movement due to living organisms causes a large turbulent intensity, and conversely, turbulent intensity occurs only by the flow of algae in a water body containing only floating matter.

Since the specific parts of the present invention have been described in detail above, to those skilled in the art, this specific technology is only a preferred embodiment, and the scope of the present invention is not limited thereby. It is obvious to those skilled in the art that various changes and modifications can be made within the scope of the scope and technical thought, and it is natural that such modifications and modifications fall within the scope of the appended claims.

100: case
110: case connector
111: first connector 112: second connector
200: lighting unit
210: first lighting unit
220: second lighting unit
230: first cable
300: camera
310: second cable
400: lighting window
500: control unit
510: camera control
520: lighting control
530: signal input and output unit
540: system control
550: synchronization device unit
560: power control

Claims (12)

A case 100 having an empty interior and a predetermined shape;
An illumination unit 200 accommodated in the case 100 and irradiating a wavelength of a predetermined region downward;
A camera 300 accommodated inside the case 100 to photograph the downward direction; And
It includes a control unit 500 for controlling the lighting unit 200 and the camera 300,
A transparent lighting window 400 is provided under the case 100;
A first cable 230 connecting the lighting unit 200 and the control unit 500;
A second cable 320 connecting the camera 300 and the control unit 500; And
The upper portion of the case 100 is convex upward, and the first connector 111 and the first connector fixed to the upper portion of the case 100 to allow the first cable 230 and the second cable 320 to pass therethrough. Further comprising a case connector 110 made of a second connector 112 detachably coupled with (111),
In the center of the lighting unit 200, a lens of the camera 300 is positioned at the center, and a first lighting unit 210 irradiating a green wavelength of 500 to 550 nm in a shape surrounding the lens, and surrounding the first lighting unit 210 Red tide detection device characterized in that the second illumination unit 220 for irradiating a red wavelength of 630 ~ 680nm in shape.
delete delete delete delete delete delete delete delete delete In the red tide detection method using the red tide detection device according to claim 1,
Placing the red tide detection device at a predetermined depth in the water;
Photographing while irradiating a wavelength of a predetermined region; And
And analyzing the spectral difference from the absorption spectrum and the action spectrum.
In the red tide detection method using the red tide detection device according to claim 1,
Placing the red tide detection device at a predetermined depth in the water;
Photographing while irradiating a wavelength of a predetermined region; And
And analyzing the photographed image information.

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