JP4554465B2 - Marine organism adhesion detector - Google Patents

Description

  The present invention relates to a marine organism adhesion detection apparatus for adhering and observing marine organisms.

  In power plants that use seawater as cooling water, if marine organisms, especially barnacles, adhere to the cooling water piping path, the load of the intake pump increases due to increased fluid resistance, cooling efficiency decreases, piping clogging, etc. Adhesion control measures were taken regularly to cause various damages.

  As countermeasures for adhesion prevention, work is performed such as injecting chemicals into the seawater to be used, increasing the frequency of cleaning with sponge balls, etc., or periodically stopping the equipment and brush cleaning. However, these maintenance operations require a large amount of money, and the operating rate is lowered by suspending the power plant facilities.

It has been proposed that anti-adhesion measures be taken only during the breeding season of barnacles, focusing on barnacles that cause serious damage among marine organisms (Patent Document 1).
JP 2003-304796 A

  The method for controlling adhesion of barnacles of Patent Document 1 is obtained by irradiating light to barnacles collected from seawater to be used, and unique in vivo fluorescence distribution pattern recognition information of barnacles obtained and stored in advance from a sample. It compares the fluorescence distribution pattern information of each individual, decides the timing of control measures, injects chemicals into seawater, and cleans equipment.

  In order to collect in-vivo fluorescence distribution pattern recognition information in advance, it is necessary to obtain a large number of samples. Samples are obtained from the seawater used, but the temperature and tides of the seawater are not constant during the season and year-round, so the growth speed of barnacles differs, and long-term data collection is required when trying to increase the accuracy of recognition information from many samples. It became indispensable and time consuming.

  The marine organism adhesion detection device according to the present invention has a seawater introduction pipe for introducing seawater and a bioadhesion chamber having a channel cross section wider than the channel cross section of the seawater introduction pipe and having one side wall as a transparent observation window. And a seawater discharge pipe for discharging seawater in the organism adhesion chamber.

  The biological attachment chamber is, for example, a rectangular box, and the observation window is configured as a transparent plate at least one of the side walls of the box, and the seawater introduction pipe is provided on the side wall adjacent to the observation chamber, You may provide the said seawater discharge piping in the side wall facing the side wall which provided seawater introduction piping.

  An image capturing device that captures image data of attached marine organisms may be provided in the observation window. In this case, the image capturing device may be a scanner device. Furthermore, a transfer device that transfers the image data captured by the image capture device may be provided.

  In this marine organism adhesion detection device, the flow path cross section of the bio adhesion chamber is wider than the flow path cross section of the seawater introduction pipe, and one side wall of the bio adhesion chamber is a transparent observation window. A place where the flow of seawater stagnates is formed on the observation window in the organism attachment chamber. The position where the flow stagnates is easy to attach marine organisms, and the state of attachment of marine organisms on the observation window can be observed.

  Further, the biological attachment chamber is a rectangular box, and the observation window is configured with at least one of the side walls of the box as a transparent plate, and the seawater introduction pipe is provided on the side wall adjacent to the observation chamber, A configuration in which the seawater discharge pipe is provided on the side wall opposite to the side wall provided with the seawater introduction pipe can form a stagnation of a slow flow rate of seawater at the corner of the organism adhesion chamber. In addition, when the seawater introduction pipe and the seawater discharge pipe are arranged in a straight line, the flow rate of the seawater flowing on the line connecting the seawater introduction pipe and the seawater discharge pipe that face each other in the rectangular biofouling chamber is fast and fast. Stagnation with a slow flow rate of seawater can be formed in a corner away from the flow rate. This makes it easier for the marine organisms to attach to the position where the itch is formed on the observation window, and the state of attachment of the marine organisms can be observed at the position of the observation window.

  In addition, an apparatus equipped with an image capturing device that captures image data of marine organisms attached to the observation window can capture the state of attachment of marine organisms in the observation window as image data. The image data can use various methods for evaluating the state of attachment of marine organisms by image processing technology or the like. When the image capturing device is a scanner device, image data can be captured along the side wall, so that planar image data is obtained, and image data is not distorted. Also, those equipped with a transfer device that transfers the image data captured by the image capture device can see the image data even at a remote location, so the evaluation accuracy can be improved using image processing technology etc. at a remote location. Can be raised. In particular, when the installation location is limited, such as seawater, it is not necessary to make a person resident or patrol at the installation location for observation.

  Hereinafter, marine organism adhesion detection devices according to embodiments of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, this marine organism adhesion detection device 1 has a seawater introduction pipe 2 for introducing seawater, a flow passage section wider than the flow passage section of the seawater introduction pipe 2, and one side wall is transparent. The observation window 3 includes a biological adhesion chamber 4 and a seawater discharge pipe 5 that discharges seawater introduced into the biological adhesion chamber 4.

  In this embodiment, the biological attachment chamber 4 is formed in a rectangular box as shown in FIG. 1, and the observation window 3 is configured such that at least one of the side walls of the box is a transparent plate, The seawater introduction pipe 2 is provided on the vertical wall 6a of the side wall adjacent to the observation room 3, and the seawater discharge pipe 5 is provided on the vertical wall 6b of the side wall opposite to the vertical wall 6a of the side wall provided with the seawater introduction pipe 2. . As shown in FIG. 1, the biofouling chamber 4 includes a side wall 7 and vertical walls 6 a and 6 b and horizontal walls 6 c and 6 d extending in the same direction from the peripheral edge of the side wall 7. The observation window 3 made of a flat transparent body is covered with a screw 9 through a seal 8 in a watertight manner. The seal 8 has waterproof grease applied to both sides of the rubber packing. The shape and material of the seal 8 are not limited to this and may be any material that can seal watertightly.

  A seawater introduction pipe 2 is provided at the longitudinal center of the vertical wall 6 a of the organism adhesion chamber 4. Further, a seawater discharge pipe 5 is provided at the center in the vertical direction of the vertical wall 6 b facing the vertical wall 6 a of the organism adhesion chamber 4. And the seawater introduction piping 2 and the seawater discharge piping 5 are arrange | positioned on the straight line. In the illustrated example, the tips of the seawater introduction pipe 2 and the seawater discharge pipe 5 protrude from the inner peripheral surface of the biofouling chamber 4 of the vertical walls 6a and 6b. It may be the same surface as the peripheral surface. And the flow path cross section of the biological adhesion chamber 4 is made wider than the flow path cross section of the seawater introduction pipe 2.

  In this embodiment, the inner surface of the biological attachment chamber 4 is formed in a size of 210 mm long × 300 mm wide × 40 mm thick. And the thickness of the biological adhesion chamber 4 is formed with 10 mm in consideration of the pressure of seawater. The biological adhesion chamber 4 is formed from a transparent acrylic resin. The biological attachment chamber 4 can also be formed of glass or metal. However, it is desirable that only the observation window 3 is formed of a transparent body such as glass or resin in order to observe the inside of the biological adhesion chamber 4. In this embodiment, the seawater introduction pipe 2 and the seawater discharge pipe 5 are formed of pipes made of vinyl chloride resin (PVC) and have an inner diameter of 24.8 mm.

  Hereinafter, the case where the state of attachment of marine organisms in a cooling water piping path of a power plant or the like is observed using such a marine organism adhesion detection device 1 will be described.

  In order to introduce seawater into the organism adhesion chamber 4, one end of the seawater introduction pipe 2 is branched from a pipe taking water as cooling water. For example, the seawater introduction pipe 2 may be pumped directly from the vicinity of the water intake.

  Seawater introduced from the seawater introduction pipe 2 flows through the biological adhesion chamber 4 from the seawater introduction pipe 2 and is discharged from the seawater discharge pipe 5 as indicated by an arrow A in FIGS. At this time, since the flow path cross section of the organism adhesion chamber 4 is wider than the flow path cross section of the seawater introduction pipe 2, the flow of seawater is stagnation when introduced from the seawater introduction pipe 2 into the bio adhesion chamber 4. As a result, there is a place where the flow of seawater is slow in the organism adhesion chamber 4. For example, in this embodiment, as shown in FIGS. 2 and 3, the seawater introduction pipe 2 and the seawater discharge pipe 5 are provided on a straight line, compared with the straight line connecting the seawater introduction pipe 2 and the seawater discharge pipe 5. As a result, stagnation occurs at the corner of the organism adhesion chamber 4 and a portion where the flow rate of seawater is low is formed.

  Marine organisms do not attach when the flow of seawater is fast, and attach when the flow of seawater is slower than a certain speed. In this marine organism adhesion apparatus 1, seawater faster than the speed at which marine organisms adhere to the seawater introduction pipe 2 and the seawater discharge pipe 5 flows so that marine organisms do not adhere to the inner wall of the pipe. In the biological adhesion chamber 4, stagnation occurs when introduced into the biological adhesion chamber 4 from the seawater introduction pipe 2, and a portion where the flow of seawater is slow occurs in the biological adhesion chamber 4. Marine organisms adhere to the observation window 3. Therefore, by directly observing the observation window 3 from the outside, it is possible to confirm the state of attachment of marine organisms attached on the observation window 3.

  In this way, marine organisms can be attached to the observation window 3 located at a location where the flow velocity is slow by creating a slow location in the flow of seawater introduced into the organism adhesion chamber 4. Observe the state of marine organisms adhering to the top, determine the method and timing of antifouling measures for condensers and other equipment that use cooling water, increase the operating rate by reducing unnecessary stoppages of equipment be able to. In addition, since the concentration of chemicals used for control measures, the timing of use and duration of chemicals can be determined while observing, unnecessary control measures can be avoided. Further, the marine organism detection device 1 can also be used as an evaluation device for determining the effect of a chemical when the chemical is injected into seawater in order to prevent adhesion of marine organisms.

  In addition, by constructing the biological attachment chamber 4 in a rectangular box with the container 6 and the observation window 3, the observation window 3 can be positioned in the stagnation that occurs in the corner of the biological attachment chamber 4. Observation can be ensured.

  Furthermore, by providing the seawater introduction pipe 2 and the seawater discharge pipe 5 in a straight line, the flow velocity of the seawater flowing on the line connecting the seawater introduction pipe 2 and the seawater discharge pipe 5 facing each other in the rectangular organism adhesion chamber 4 However, it is possible to form a stagnation with a slow flow rate of seawater in a corner away from this fast flow rate. This makes it easier for the marine organisms to attach to the position where this itch is formed on the observation window 3, and the state of attachment of the marine organisms can be observed at the position of the observation window.

  As mentioned above, although the marine organism adhesion detection apparatus concerning one embodiment of the present invention was explained, the marine organism adhesion detection apparatus concerning the present invention is not limited to the above-mentioned embodiment, and the summary of the present invention is obtained. Of course, various modifications can be made without departing from the scope.

  For example, as shown in FIG. 4, the concave and convex portions 10 and 11 that cause marine organisms to adhere can be formed on the inner peripheral surface of the observation window 3. In this example of illustration, the uneven | corrugated | grooved parts 10 and 11 are formed in the inner peripheral surface of the observation window 3 near the corner part of the inflow side and outflow side of seawater. This makes it easier for marine organisms to adhere to the uneven portions 10 and 11. The uneven portions 10 and 11 may be fine uneven portions, and the uneven portions in FIG. 4 are exaggerated for easy understanding.

  Further, as shown in FIG. 5, the film 12 can be attached to the inner peripheral surface of the biological attachment chamber 4. The film 12 is made of polyethylene terephthalate (PET) and attached to the inner peripheral surface of the biological adhesion chamber 4. Therefore, when cleaning the inside of the organism adhesion chamber 4 after the control measures are completed, the trouble of cleaning can be saved by replacing the film 12. The film 12a covering the inner peripheral surface of the organism adhesion chamber 4 of the observation window 3 is a light transmissive film 12a such as polyethylene terephthalate (PET), thereby observing marine organisms attached to the light transmissive film 12a. It can be observed from the outside of the window 3. In FIG. 5, the ends of the films 12 and 12a are sandwiched between the container 6 and the observation window 3 and the seal 8 is omitted. However, when the watertightness cannot be maintained, the seal 8 is used. The material of the film 12 is not particularly limited, and for example, vinyl resin, styrene resin, polyethylene resin, polyacetal resin, acrylic resin, polyamide resin, cellulose resin, polycarbonate resin, polyester resin Etc. may be selected.

  In addition, as shown in FIG. 6, the organism adhesion chamber 4 can be shielded from light except for the observation window 3. This prevents light from reaching the organism attachment chamber 4, thereby preventing the attachment of marine organisms that cannot live without light, making it easier to observe by attaching barnacles that grow and adhere even without light. Become. Specifically, as shown in FIG. 6, when the organism adhesion chamber 4 is formed of a transparent body, the light shielding materials 13 and 14 can be provided on the outer peripheral surface of the organism adhesion chamber 4. The light shielding material 13 is configured by applying paint or the like on the outer peripheral surface of the container 6. Further, the light shielding material 14 is detachably attached to the outer peripheral surface of the observation window 3. The reason why the light shielding material 14 provided in the observation window 3 is detachable is that the light shielding material 14 is removed and observed only when it is desired to observe. Therefore, unless the light shielding material 14 is removed, the inner surface of the organism adhesion chamber 4 is kept dark, so that only marine organisms that can inhabit without light such as barnacles are attached to the observation window 3. it can. Further, when the container 6 is not formed of a transparent body but is formed of a light-shielding material, the light-shielding materials 13 and 14 are provided by detachably attaching the light-shielding material 14 to the outer peripheral surface of the observation window 3. The same effect can be obtained. The light shielding members 13 and 14 may be colored so that the light does not need to be completely blocked and the light does not easily pass therethrough.

  Further, for example, as shown in FIGS. 7 and 8, an image capturing device 15 that captures the state of the observation window 3 as image data can be provided in the observation window 3 of the organism adhesion chamber 4. The image capturing device 15 may be any device that can be recorded in a scanner or a camera. As shown in FIG. 8, the image capturing device 15 uses a scanner device 15s. The scanner device 15s is not specially structured and can be sufficiently used even with a commercially available scanner device. In this embodiment, in consideration of the fact that the captured image data is the inner peripheral surface of the observation window 3, a CCD type flat bed type having a deep depth of field is employed as the scanner device 15s.

  In the embodiment, as shown in FIG. 8, the scanner device 15s is mounted such that the platen glass 16 of the scanner device 15s and the observation window 3 of the biological attachment chamber 4 are in surface contact. At this time, since the observation window 3 and the platen glass 16 are both formed in a plane, there is no gap around them. If there is a gap, the periphery should be covered with a sealing material.

  Inside the scanner device 15s, as shown in FIG. 8, a light source 17 that moves along the platen glass 16 and irradiates the observation window 3 with oblique light, and a reflected lens diffusely reflected from the observation window 3 are collected. Reflecting mirrors 19, 20, and 21 that lead to 18 and an image sensor 22 that receives the reflected light from the condenser lens 18 are provided. The image sensor 22 converts received light into an electrical signal and outputs it as an image signal, and a line CCD, a line color CCD, or the like is used. As the light source 17, a fluorescent lamp, a halogen lamp, or the like is used. Further, the light source 17 and the reflection mirrors 19, 20, and 21 are reciprocally moved in synchronization with the arrow B direction in FIG. 8 so that the optical path length from the light source 17 to the image sensor 22 is constant.

  In this embodiment, the scanner device 15 s is connected to an external device connection terminal such as a USB or RC232C of the personal computer 23, and the operation is controlled by the personal computer 23. A storage device 24 and a display device 25 are connected to the personal computer 23. As the recording device 24, as shown in FIG. 7, the hard disk of the personal computer 23 is used. As the recording device 24, there are a case where recording is performed on a semiconductor memory, a CD, a DVD, a tape and the like in addition to a hard disk, and a case where recording is performed by directly printing on paper from a printer or the like. As the display device 25, a monitor of a personal computer 23 is used as shown in FIG. As the display device 25, a liquid crystal projector or the like can be used in addition to a CRT or a liquid crystal monitor.

  By attaching the image capturing device 15 to the organism adhesion chamber 4 in this way, the state of the observation window 3 can be captured as image data, so that the image data can be confirmed each time or collectively, and marine organisms. It is possible to improve the efficiency of the confirmation work of the state of adhesion.

  The image data can be used to evaluate the state of attachment of marine organisms by various methods using an image processing technique or the like. Thereby, evaluation of the adhesion state of marine organisms can be performed objectively, and evaluation accuracy can be improved. Furthermore, by recording it as image data, it can be confirmed when necessary and reused in a report or the like.

  By using the scanner device 15s as the image capturing device 15, plane image data can be captured along the observation window 3, so that the image is not distorted as compared with the case of recording with a camera. Image data that is very easy to see can be obtained. Barnacle larvae could be confirmed from a shell diameter of about 1 mm by capturing the state of the observation window 3 as image data using the scanner device 15s. Thereby, marine organisms, such as barnacles, can be detected at an early stage.

  By bringing the observation window 3 of the biofouling chamber 4 and the platen glass 16 of the scanner device 15s into close contact with each other, it is possible to prevent external light from entering the biofouling chamber 4; It is possible to attach only specific marine organisms to the peripheral surface of the organism attachment chamber of the observation window 3. Further, the light for capturing as image data can be sufficiently captured by the light source of the scanner device. Further, even if the observation window 3 is thick, by using a CCD sensor as the image sensor 22 of the scanner device 15s, the marine attached to the observation window 3 by utilizing the deep depth of field by the CCD sensor. It is possible to reliably capture living organisms as image data. According to the applicant's experiment, when the thickness of the observation window 3 is up to 10 mm, the state of marine organisms can be captured as image data.

  In addition, although the platen glass 16 of the image capturing device 15 and the side wall 7 of the biological adhesion chamber 4 are configured separately, the platen glass 16 and the side wall 7 may be used together and one of them may be omitted.

  Further, for example, as shown in FIG. 7, a transfer device 26 for transferring the image data captured by the image capture device 15 can be provided. The transfer device 26 can be performed by LAN, telephone, wireless communication, or the like. As shown in FIG. 7, when the transfer device 26 is configured by a LAN, the LAN cards 27 and 27a are respectively attached to the personal computer 23 installed in the same place as the organism adhesion chamber 4 and the personal computer 23a installed in a remote place. Connected to the LAN via the hubs 28 and 28a and the routers 29 and 29a. If a wired LAN cable is used as the transfer device 26, the cost increases when there is no other device connected to the LAN at the place where the organism adhesion chamber 4 is installed. Furthermore, it is also possible to transfer image data via a mobile phone by connecting the mobile phone and the personal computers 23 and 23a with communication cables. In recent years, mobile phone companies have established a flat-rate and inexpensive environment as a data communication means, so it is cheaper to use a mobile phone depending on the installation location.

  In addition, by providing the remote computer 23a with the recording device 24a and the display device 25a, the personal computer 23 provided in the organism adhesion chamber 4 can be operated in various ways by remote operation to record, display and analyze image data. Yes.

  Since the transfer device 26 is provided in this manner, the image data of the image capturing device 15 attached to the organism adhesion chamber 4 can be transferred, and various uses can be made at the transfer destination. For example, the state of the observation window 3 can be captured as image data by periodically operating the personal computer 23. This image data may be transferred to the recording device 24a of the personal computer 23a installed in a separate place each time, or may be transferred collectively at regular intervals. At the same time, the image may be displayed on the display device 25a for observation. The image data can be captured by the image capturing device 15 from the personal computer 23 connected to the image capturing device 15, or the personal computer 23 can be operated from a remote location by setting the personal computer 23a installed at a separate location. Then, the image capturing device 15 may be operated.

  Since the image data captured by the image capture device 15 can be transferred to a separate location by the transfer device 26, the image data can be confirmed at a remote location, reducing the effort for confirming the image. There is no need to reside or visit the installation site. Further, since image data can be analyzed by a computer installed at a separate location, the state of attachment of marine organisms in the observation window 3 can be analyzed, and the evaluation accuracy can be improved as compared with the work performed manually.

The figure is a perspective view of the marine organism attachment apparatus of the present invention. It is a cross-sectional view of FIG. It is a side view of FIG. It is a cross-sectional view provided with the uneven | corrugated | grooved part equivalent to FIG. It is a cross-sectional view provided with the film equivalent to FIG. It is a cross-sectional view which shows the state which covered the biological adhesion chamber with the light shielding material of FIG. It is a conceptual diagram which shows the state which attached the image capture apparatus to the marine organism adhesion detection apparatus of FIG. 1, and was connected to LAN. It is a cross-sectional view showing the relationship between the marine organism adhesion detection device and the image capture device of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Marine organism adhesion detection apparatus 2 Seawater introduction piping 3 Observation window 4 Biological adhesion chamber 6 Container 6a, 6b Vertical wall 6c, 6d Horizontal wall 7 Side wall 8 Seal 10, 11 Uneven part 12, 12a Film 13, 14 Light shielding material 15 Image acquisition 15s Scanner device 16 Platen glass 17 Light source 18 Condensing lenses 19, 20, 21 Reflection mirror 22 Image sensor 23, 23a Personal computer 24 Recording device 24a Recording device 25 Display device 25a Display device 26 Transfer device 27, 27a Cards 28, 28a Hub 29, 29a Router

Claims (7)

A seawater introduction pipe for introducing seawater, a biological adhesion chamber having a channel cross section wider than that of the seawater introduction pipe, and having one side wall as a transparent observation window, and seawater introduced into the biological adhesion chamber A marine organism adhering detection device, comprising: a seawater discharge pipe for discharging the water, and an image capturing device for capturing image data of marine organisms attached to the observation window, wherein the image capturing device is a scanner device. apparatus.   The biological attachment chamber is a rectangular box, the observation window is configured with at least one of the side walls of the box as a transparent plate, the seawater introduction pipe is provided on a side wall adjacent to the observation chamber, and the seawater The marine organism adhesion detection apparatus according to claim 1, wherein the seawater discharge pipe is provided on a side wall opposite to the side wall provided with the introduction pipe.   The marine organism adhesion detection apparatus according to claim 2, wherein the seawater introduction pipe and the seawater discharge pipe are provided on a straight line.   The marine organism adhesion detection apparatus according to claim 1, wherein irregularities that trigger adhesion of marine organisms are formed on an inner peripheral surface of the observation window.   The marine organism adhesion detection apparatus according to claim 1, wherein a film is attached to an inner peripheral surface of the organism adhesion chamber.   The marine organism adhesion detection apparatus according to claim 1, wherein the organism adhesion chamber is configured to block light except for an observation window. The marine organism adhesion detection apparatus according to claim 1 , further comprising a transfer device that transfers image data captured by the image capture device.

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