JP4594779B2 - Attached organism investigation device and attachment organism investigation method - Google Patents

Description

  The present invention relates to a technique for investigating the inhabiting state of attached organisms such as barnacles and mussels that inhabit the rock surface and walls in water. More specifically, the present invention relates to a technique for investigating the inflow amount of adhering organisms into a water intake channel or pipe through which water flows.

  In general, thermal power plants and nuclear power plants are provided with condensers that exchange heat between the steam and seawater in order to cool the steam used to drive the turbine. In this way, the condenser uses seawater, so the inner surface of intake channels and pipes that send seawater to the condenser usually has barnacles, mussels etc. Living organisms (hereinafter referred to as “adhering organisms”) flow from the intake and adhere. These attached organisms flow into the intake channel at the stage of larvae, float in the water while repeatedly separating and attaching, and eventually settle in the intake channel and piping to become adults.

  In general, intake pipes and pipes for condensers are made large with a play called attachment allowance, assuming that attached organisms adhere, but attached organisms attached to the inner surface of intake pipes and pipes If left unattended, waterways and piping will be clogged, making it impossible to operate the plant, and a large amount of waste will be generated during cleaning operations during regular inspections.

Conventionally, as countermeasures against attached organisms,
(1) Injection of chemicals (eg chlorine aqueous solution, hydrochloric acid, hydrogen peroxide preparation, ferrous sulfate, copper ion, etc.)
(2) Cleaning with a cleaning robot,
(3) Sponge ball cleaning by flowing a sponge-like sphere into the pipe,
(4) Applying paint that suppresses adhesion (for example, antifouling paint) to the inner surface of the pipe,
(5) Manual cleaning is carried out. Among the various measures described above, (1) chemical injection, (2) cleaning by a cleaning robot, and (3) sponge ball cleaning have the advantage that they can be performed while the plant is in operation (through water). It is carried out in many plants that use seawater (hereinafter referred to as “seawater utilization plant”) such as power plants.

  Looking at the growth process of attached organisms, barnacles are so-called Nauplius larvae that float in the water when they are erupted from the parent's body, and transform into Cypris larvae that adhere to rocks etc. after molting six times. . Cypris larva repeats attachment and detachment while searching for compatibility with attachment surfaces such as rocks, and eventually decides where it will settle and becomes an adult. Also, the mussel, a kind of mussel, hatches from an egg and becomes a trochophore larva (also called a crocophora larvae). . Pediberger larvae become juveniles that adhere to the rock surface, and eventually become adults.

  As mentioned above, it is known that attached organisms adhere to rocks and walls, etc. at the stage of larvae, and in seawater utilization plants such as power plants, the attached organisms in the intake seawater are used to effectively implement the various measures described above. In some cases, it is determined whether or not to take various measures as described above.

  Conventionally, the determination of whether or not to take the above-mentioned various measures was performed by filtering a predetermined amount of seawater with a plankton net capable of capturing plankton and other organisms, and passing water with the number of attached organisms captured at this time. Based on the amount of seawater. Alternatively, using the characteristics of barnacle cypris larvae that fluoresce specific parts in the body when irradiated with excitation light (for example, ultraviolet rays), as described in Patent Document 1 below, cypris larvae of various barnacles collected from a predetermined amount of seawater Compare the fluorescence distribution pattern of each individual obtained by irradiating excitation light (for example, ultraviolet light) to the various fluorescent distribution patterns to identify the species of barnacles, and that species contained in unit volume of seawater Judgment based on the number of individuals.

JP 2003-304796 A

  However, although the technique of the above-mentioned document is an advanced technique that can identify any captured barnacle seed among 200 or more barnacle seeds, in a seawater utilization plant, in order to determine when to take the above-mentioned various measures. May not need to identify the species of attached organisms. That is, in a seawater utilization plant, if all the attached organisms adhering to the inner surface of the intake channel and the piping are collected together and the inflow situation is grasped as an organism that hinders the operation of the plant, the necessity of countermeasures can be determined. Therefore, in many seawater utilization plants, a simple method that can investigate the state of inflow of attached organisms into intake channels and pipes without the need for advanced knowledge and techniques as described above is desirable.

  In view of the above circumstances, an object of the present invention is to provide an attached organism investigation apparatus and an attached organism investigation method that can easily investigate the inflow state of attached organisms into intake channels and pipes.

  The attached organism investigation device of the present invention is a device for investigating the inhabiting state of attached organisms attached to rocks, walls, etc. in water, and has a transparent observation surface having a contact surface with water in which the attached organisms may exist. And an imaging means for imaging the contact surface from the opposite side and generating the image, and an attached organism counting means for counting and outputting attached organisms on the image.

  In an embodiment of the present invention, the attached organism counting means identifies and counts the attached organism based on the difference between the color of the attached organism on the image and the color of other portions. Alternatively, the attached organism counting means may count the attached organism or, instead of this, identify the attached organism based on the difference between the color of the attached organism on the image and the color of the other part, and The ratio of the attached organism in the total is obtained and output.

  In another embodiment of the present invention, the observation unit is a part of a container including the water introduction unit and the water discharge unit.

  As the attached organism, barnacles or mussels can be investigated.

  As the water, water taken in a power plant or other plant using water can be investigated. In this case, based on the number of attached organisms on the image or the proportion of attached organisms in the image, whether or not to take measures to remove or prevent the attached organisms on the path through which the water flows. A determination unit for determining may be provided.

  The method for investigating attached organisms of the present invention is a method for investigating the habitat of attached organisms that adhere to rocks, walls, etc. in water, wherein water on which the attached organisms may exist and one surface of a transparent observation section And an image of the surface seen from the opposite side is generated, and the attached organisms on the image are counted.

  In an embodiment of the present invention, the number of attached organisms is obtained by identifying the attached organisms based on the difference between the color of the attached organisms on the image and the color of other portions. Alternatively, in addition to counting or instead of the attached organism, the attached organism is identified based on the difference between the color of the attached organism on the image and the color of other parts, and the percentage of the attached organism in the image Ask for.

  According to the attached organism research apparatus of the present invention, it is possible to automatically count and output the attached organisms on the image, and thus it is possible to easily check the habitat state (inflow status, adhesion status, etc.) of the attached organism. The number of attached organisms can be determined by identifying the attached organisms based on the difference between the color of the attached organisms on the image and the color of other parts. In this case, for example, an attached organism can be identified by using a general image processing technique such as an image binarization process. Furthermore, by obtaining the ratio of attached organisms in the image, it is possible to investigate the habitat of the attached organisms as in the case of obtaining the number of attached organisms.

  By making a part of the container equipped with a water introduction part and a discharge part where adhering organisms can exist as an observation part, it is possible to attach the adhesion organism only to one surface of the container, When viewed from the opposite side, the bottom portion (white portion) of the attached attached organism becomes easier to see. In addition, since water can be introduced with the container placed on an appropriate place such as the ground or a workbench, there is no need to hold the observation part itself by hand, which is convenient for investigation. .

  Moreover, since the habitat of barnacles or mussels can be investigated, it is possible to investigate by a much simpler method compared to the conventional complicated investigation method using a plankton net. In this case, by examining the water taken in the power plant or other plants that use water, it is possible to envisage the habitat of attached organisms (for example, the inflow situation and the attachment situation) in the path through which this water flows. . Furthermore, various measures can be effectively taken by determining whether or not to take measures for removing attached organisms or preventing adherence to the path through which the taken water flows.

  FIG. 1 shows an attached organism investigation system 1 for carrying out the attached organism investigation method of the embodiment.

  In order to investigate the habitat status (inflow status) of attached organisms in seawater taken by a plant that uses seawater (for example, a power plant), the attached organism survey system 1 uses, for example, the collected seawater to use seawater utilization equipment (for example, The investigation system 4 can be branched from the condensate system 3 to be sent to the condenser, and can be provided on the investigation system 4.

Specifically, the attached organism research system 1
It consists of a hollow container with a transparent observation part provided on the investigation system 4. When the seawater introduced into this container comes into contact with one surface of the observation part, the state of attachment of attached organisms on that surface is observed. An attached organism observation container 5 that can be observed from the opposite side through the section;
In order to remove attached organisms that are connected in parallel to the attached organism observation container 5 on the investigation system 4 and adhere to the inner surface of the attached organism observation vessel 5, a hydrochloric acid solution (for example, a hydrochloric acid concentration of 30%) is contained in the attached organism observation vessel 5. ) Is circulated.

The cleaning liquid circulating means 7
A cleaning liquid storage tank 10 for storing a hydrochloric acid solution;
It is comprised with the pump 11 which sends out hydrochloric acid solution.

  Further, the investigation system 4 is provided with a plurality of valves 13a, 13b, 13c, 13d for opening and closing the path. For example, by closing the valves 13b, 13c provided immediately before and after the cleaning liquid storage tank 10, The seawater branched from the condensate system 3 flows through the attached organism observation container 5 and is discharged. On the contrary, when the valves 13a and 13d are closed, the seawater from the condensate system 3 side is shut off, and the valves 13b and 13c before and after the cleaning liquid storage tank 10 are opened to operate the pump 11. The hydrochloric acid solution circulates between the attached organism observation container 5 and the cleaning liquid storage tank 10.

Furthermore, the attached organism research system 1
The attached organism observation container 5 is a component, and data such as the number of attached organisms attached to the inner surface of the attached organism observation container 5 (specifically, one surface of the observation unit) is obtained and attached in the condensate system 3. It is provided with an attached organism investigation device 8 that determines whether it is necessary to take measures for removing organisms or preventing adhesion, and presenting the determination result in an image or sound.

Specifically, the attached organism investigation device 8
In addition to the attached organism observation container 5,
A CCD camera 15 as an imaging means for imaging the contact surface of the attached organism observation container 5 with seawater from the opposite side (outside);
Whether the number of attached organisms on the image or the percentage of attached organisms in the image is obtained and whether or not measures should be taken to remove or prevent attached organisms in the condensate system 3 based on the data. And the attached organism counting means 16 for outputting the data and the discrimination result;
An output unit (for example, a monitor, a speaker, etc.) 17 capable of presenting the current or past data and the discrimination result output from the attached organism counting means 16 with an image or sound is configured.

  The CCD camera is an image pickup means including a charge coupled device (an element called CCD [Charge-Coupled Device]) that generates a current proportional to the brightness of input light as a light receiving unit.

  FIG. 2 is a perspective view of the attached organism observation container 5, and FIG. 3 is a cross-sectional view of the attached organism observation container 5 taken along the line AA.

  The attached organism observation container 5 is a container for investigating the living state of attached organisms such as barnacles and mussels adhering to rocks and walls in seawater, and makes one surface of a transparent observation part contact seawater. The attached organism can be attached by this, and the state of attachment can be observed from the opposite side of the surface.

Specifically, the attached organism observation container 5 is
It is sufficient if the transparent observation part is included at least in part, but in the illustrated example, the container body 20 made entirely transparent,
An introduction part 22 for introducing seawater containing attached organisms into the container body 20;
The seawater introduced into the container body 20 from the introduction part 22 can be constituted by a discharge part 23 that discharges the seawater outside the container body 20.

  The container body 20 is made by combining a plurality of acrylic plates 24 in a box shape, and is entirely transparent. The acrylic plate 24 located on the upper surface of the container body 20 is formed in a rectangular ring shape through the central portion, and is fixed with screws 27 so that it can be easily removed together with the transparent glass plate 25 forming the observation portion. . Thereby, the part which comprises the upper surface of the container main body 20 is further improved in transparency as an observation part. If attached organisms adhere to one surface of the glass plate 25 as an observation part, that is, the surface that appears inside the container body 20, the state of attachment can be observed from the outside of the container body 20 through the glass plate 25.

  Further, when seawater is introduced into the container body 20 from the introduction portion 22, the following treatment is performed in order to attach more adhered organisms to the inner surface of the container body 20.

  First, one surface of the glass plate 25 that forms the observation part of the container body 20 (the surface that appears inside the container body 20) is made of acrylic resin or the like in a direction substantially perpendicular to the direction of seawater flowing in the container body 20. Irregularities are provided by attaching a plurality of the elongated plate-like members 29 (for example, by bonding) or by integrally forming them. Moreover, as shown in FIG. 3, among the unevenness | corrugation produced by the glass plate 25 and the plate-shaped member 29, especially the recessed part is coated with the paste 30 made by grinding adhering organisms (for example, barnacles).

  By applying the above treatment to one surface of the glass plate 25 of the container body 20, when introducing seawater containing attached organisms for a predetermined time (for example, 1 hour), compared to the case where the above treatment is not performed, The number of attached organisms adhering to the treated site is greatly increased (for example, increased from 0 to 2 to several tens). In this way, by attaching a much larger number of attached organisms, it is possible to reliably grasp the habitat state of attached organisms in the introduced seawater (such as the number of attached organisms and their changes over time).

  As described above, when the glass plate 25 of the container main body 20 is made uneven, the reason for the increase in the number of adhering organisms attached is that, for example, a part of seawater introduced from the introduction unit 22 It can be mentioned that a sufficient amount of time is required for the larvae of the attached organisms to adhere by staying with the attached organisms in the recesses formed between the shaped members 29.

  Moreover, when the paste 13 made of the attached organisms to be controlled is applied to the glass plate 8, the following may be considered as the reason for the increase in the number of attached organisms attached. Since the attached organisms live on the base, they cannot easily move their habitats. Therefore, if they attach to a place where there are no same species of attached organisms around, they may not be able to reproduce. In other words, for attached organisms, the selection of the attachment location at the larval stage is a matter of life and death. In addition, the place where the same kind of adult as the larva is attached is a place where there is a record of survival, and it can be said that it is also a suitable place in the sense that there is a partner who will perform breeding behavior in the near future. Further, in the case of barnacles, it is known that adults secrete substances that induce the attachment of larvae of the same species. For example, in JP-A-8-81496, a larvae adhesion inducer secreted by adults Has been identified. As described above, the paste 30 is applied to the back side of the glass plate 25 where the attached organism is to be attached during the survey, so that the attached organism larva flowing in the container body 20 adheres near the same species of living organism. Instinct to try is considered to work.

  The introduction part 22 and the discharge part 23 are both cylindrical tubes connected to the container body 20 and are respectively attached to both sides of the container body 20 so as to face each other. Further, as shown in FIG. 3, an annular or spiral groove 31 is provided at each end of the introduction part 22 and the discharge part 23 along the outer periphery. Accordingly, when pipes 33 and 34 made of resin (for example, rubber or vinyl chloride) having a slightly smaller inner diameter than these outer diameters are fitted into the introduction part 22 and the discharge part 23, respectively, The tube 33 and the discharge portion 23 and the tube 34 are connected together without being easily disconnected.

  FIG. 4 shows an arrangement configuration of the attached organism observation container 5 and the CCD camera 15 as the imaging means.

  In the embodiment, when the attached organism observation container 5 is installed in the system, the container main body 20 is placed in a box 37 having an upper portion opened, and provided on the side surfaces (left and right surfaces in the figure) of the box 37. The holes 39 are fitted into the introduction part 22 and the discharge part 23 from the outside of the box 37 through the pipes 33 and 34. The CCD camera 15 is held above the container body 20 by a camera holder 40 attached to the back surface (rear surface in the figure) of the box 37, and a cable 41 attached to the upper part of the CCD camera 15 is counted. Connected to means 16 (FIG. 1).

  The box 37 is made in such a size that the container main body 20 can enter, and the inner surface is painted in a dark color (for example, black). By coating the inner surface of the box 37 with a dark color, the difference in the shade value between the light color (for example, white) of the attached organism attached to the glass plate 25 of the container body 20 and the background dark color stands out, and the attached organism described later. Identification becomes easy.

The camera holder 40 is
A pole 43 made of a plastic material such as metal or resin;
A pole fixing member 44 which is attached to the inner surface (rear surface in the figure) of the box 37 up and down and fixes one end of the pole 43 to the box 37;
A camera fixing member 45 that fits the pole 43 and is fixed so as to be movable along the pole 43 and that fixes the CCD camera 15.

  The pole fixing member 44 is attached to the box 37 by an appropriate method such as bolting or adhesion. The pole fixing member 44 is provided with a hole 47 large enough to receive the pole 43. By inserting a screw or a bolt 48 from the side with the pole 43 inserted into the hole 47, the pole 43 is fixed. It fixes to the box 47 integrally.

  The camera fixing member 45 is provided with holes 50a and 50b at both ends, and the CCD camera 15 is fixed by screwing screws or bolts 51 from the side with the CCD camera 15 inserted into one hole 50a. Then, the adjustment screw 53 is screwed in from the side with the pole 43 inserted into the other hole 50b, so that the pole 43 is fixed at an appropriate position. The adjustment screw 53 has a head made of resin or the like so that it can be gripped and rotated easily.

  FIG. 5 shows a configuration of the attached organism counting means 16 and a signal flow in the attached organism counting means 16.

The attached organism counting means 16
An imaging controller 55 that controls the CCD camera 15 to operate at predetermined time intervals;
A shading correction unit 56 that uniformly corrects the brightness of a monochrome image sent from the CCD camera 15;
The color of each pixel is converted to white or black on the basis of a value representing the shade of color of each pixel constituting the image (hereinafter referred to as “shade value”) and a predetermined shade threshold, and the image is converted to white. A binarization processing unit 57 represented by binary values (the gray value is “0”) and black (the gray value is “1”);
In a binarized image, a noise removal unit 58 that removes noise by replacing white or black pixels (noise) that exist in isolation by one pixel with black or white, and
The attached organism observation container 5 appearing on the image is converted into the background, that is, the color (white) of the pixel representing the attached organism observation container 5 is converted into a color different from the pixel representing the attached organism (the same black as the background) (hereinafter “filtering”). A filter application unit 59 for processing);
After removing the pixels that form the outline of the region representing the attached organism on the image and performing a contraction process that makes the area one size smaller, the contracted area is subjected to a process opposite to the contraction process to Shrink expansion treatment that separates multiple attached organisms (specifically, areas representing attached organisms) that are in contact with each other and appear as a lump, and identifies each attached organism by applying an expansion treatment that makes it one size larger Part 60;
A counting unit 61 that obtains the number of attached organisms appearing on the image by performing a labeling process that numbers each clustered region representing each attached organism;
Whether it is necessary to take measures to remove or prevent adherence in the condensate system 3 (FIG. 1) by comparing the number of individuals obtained by the counting unit 61 with a predetermined criterion. A determination unit 63 for determining whether or not
A data storage unit 65 for storing data such as the number of individuals obtained by the counting unit 61, a determination result by the determination unit 63, and a determination criterion;
A data processing unit 67 for obtaining processing information such as statistics of data such as the number of attached organisms in the data storage unit 65 or a graph of change over time;
An input unit (for example, a mouse and a keyboard) 69 that can perform operations such as selecting or editing the content of information to be output to the output unit 17 and editing a determination criterion.

  The filter used by the filter application unit 59 for the filtering process, that is, the black pixel region having the same shape as the attached organism observation container 5 that appears on the image, is, for example, the initial state in which the attached organism observation container 5 is installed in the box 37. The image is captured by the CCD camera 15, the image is displayed on the output unit 17 (monitor), and the position of each pixel representing the attached organism observation container 5 on the image is stored in the filter application unit 59.

  The output unit 17 presents the number of attached organisms determined by the counting unit 61 and the determination result by the determination unit 63 as an image or sound, and presents processing information obtained by the data processing unit 67 (for example, displays a graph). To do.

  FIG. 6 is a flowchart of the attached organism investigation method of the embodiment.

  In order to examine the inflow state of attached organisms in seawater flowing through the condensate system 3, first, the valve 13a provided on the most upstream side of the investigation system 4 and the valve 13d provided on the most downstream side are opened, and the attached organisms are opened. Seawater is introduced into the observation vessel 5 (step [hereinafter referred to as ST] 1), and the number of attached organisms attached to the inner surface of the attached organism observation vessel 5 is counted. Specifically, the number of attached organisms is determined by the attached organism investigation device 8 performing an attached organism counting process (ST2).

  FIG. 7 is a flowchart of the attached organism counting process.

  First, the imaging control unit 55 of the attached organism counting unit 16 controls the CCD camera 15 to contact the attached organism observation container 5 with seawater when the predetermined investigation time has come (the determination in ST11 is “YES”). The surface is imaged from the opposite side, and the image is generated, that is, the state of attachment of attached organisms on one surface of the glass plate 25 is imaged (ST12). The investigation time determined by the imaging control unit 55 is, for example, immediately after the attached organism counting means 16 is turned on or when a predetermined time (for example, 1 hour) has passed, and a predetermined time from the immediately preceding investigation time ( For example, 1 hour) has elapsed, and these predetermined times are appropriately determined according to the circumstances of the manager (for example, power plant) of the attached organism survey system 1 and the inflow situation of attached organisms ( For example, the survey interval can be shortened when the number of adhering organisms is large.

  FIG. 8 shows the state of attachment of attached organisms (for example, vertical barnacles) 71 on the glass plate 25 of the attached organism observation container 5 taken by the CCD camera 15. The CCD camera 15 adheres to the contact surface by focusing on the contact surface with the seawater of the glass plate 25 forming the upper surface of the container body 20 (strictly, the surface appearing inside the container body 20). Attached organisms can be clearly imaged. Moreover, in the example of illustration, although the container main body 20, the introducing | transducing part 22, and the discharge | emission part 23 were represented with the light color (white), since these are originally made transparent, when using light (sunlight or illumination) Depending on how the light hits, the color of the background (the inner surface of the box 37) may affect and appear dark (for example, black or dark gray).

  In addition, since the paste 30 made of attached organisms is applied to the contact surface of the glass plate 25 of the attached organism observation container 5 with seawater as described above (FIG. 3), the inside state is slightly visible on the image. Although it is difficult, the attached organism 71 adheres directly to the glass plate 25 and the attached organism 71 is white, so that the bottom of the attached organism 71 appears clearly on the image as shown in the figure. Furthermore, if the paste 30 is colored in a dark color (for example, black), the white color of the attached organism 71 stands out, and the attached state of the attached organism 71 can be more reliably grasped on the image.

  Next, the shading correction unit 56 performs shading correction on the monochrome image sent from the CCD camera 15 (ST13), and corrects uneven brightness.

  The binarization processing unit 57 performs binarization processing on the shading-corrected image (ST14). Specifically, when the number of pixels constituting the image (also referred to as “appearance frequency”) and the density value of the color are represented by a density histogram as shown in FIG. 9, valleys appearing in the density histogram are shown. The gray value of the portion can be determined as a binarization processing reference (threshold value). As shown in FIG. 10, pixels that show a gray value that is higher than the threshold value are represented by a dark color (black with a gray value of “1”), and pixels that show a gray value that is lower than the threshold value are a light color (the gray value is “0”). "White"), the counting object (attached organism 71) and attached organism observation container 5 can be separated from the background. In addition, for example, regarding the handling of a pixel having the same gray value as the threshold value, it may be determined that the pixel is converted into either a dark color or a light color. In the illustrated example, a portion (background) that originally appears in black is shown in gray for convenience of explanation.

  Then, after the noise removing unit 58 removes noise from the binarized image (ST15), the filter applying unit 59 applies a filter composed of pixels having the same shape as the attached organism observation container 5 appearing on the image. Thus, as shown in FIG. 11, the pixel representing the attached organism observation container 5 appearing on the image is backgrounded (converted to black) (ST16).

  Thereafter, the contraction / expansion processing unit 60 performs contraction processing (ST17) and expansion processing (ST18) on the image after the filter application. Specifically, first, by removing the contour pixels of the regions 75a and 75b representing the attached organism 71 on the image (FIG. 12A), a region 76a, which is slightly smaller as shown in FIG. 76b is obtained (shrinkage process). In general, a planar image processed by a computer is represented by two-dimensional coordinates, and an image g (x, y) obtained by shrinking an image f (x, y) can be obtained by the following equation.

  In Equation 1, “0” is a white pixel and “1” is a black pixel. In addition, 4 neighborhoods are four pixels on the top, bottom, left, and right when an arbitrary one pixel is focused, and 8 neighborhoods are the surroundings when an arbitrary one pixel is focused. These are 8 pixels.

  Then, the contraction / expansion processing unit 60 performs a process opposite to the contraction process on the image subjected to the contraction process (FIG. 12B), thereby obtaining a slightly larger area as shown in FIG. Expansion treatment). Specifically, an image h (x, y) obtained by expanding the image g (x, y) after the shrinkage process can be obtained by the following equation.

  By performing the contraction process and the expansion process, two white pixel areas 75a and 75b (specifically, areas representing attached organisms) that are in contact with each other and appear as a lump in FIG. As shown in (c), they are separated into separate regions 77a and 77b.

  After performing shrinkage processing and expansion processing on the image, the counting unit 61 counts the number of individuals of the attached organism 71 (ST19), and stores data such as the obtained number of individuals and the investigation time in the data storage unit 65. Specifically, by attaching a number (label) to each of the regions 77a and 77b of the white pixels (pixels indicating the attached organism 71) appearing on the image (FIG. 12C), the glass plate of the attached organism observation container 5 The number of the attached organisms 71 attached to 25 can be obtained.

  Returning again to the flowchart of FIG. 6, the determination unit 63 is for removing the attached organism 71 or preventing the attachment to the condensate system 3 based on the number of the attached organism 71 obtained by the counting unit 61. It is determined whether or not countermeasures are taken (ST3).

For this measure, for example,
(1) Injection of chemicals (eg chlorine aqueous solution, hydrochloric acid, hydrogen peroxide preparation, ferrous sulfate, copper ion, etc.)
(2) Cleaning with a cleaning robot,
(3) Sponge ball cleaning by flowing a sponge-like sphere into the pipe,
(4) Applying paint (for example, organotin paint) to the inner surface of the pipe to suppress the adhesion of attached organisms,
(5) There is manual cleaning, and the above (1) to (3) can be performed even while the plant is in operation.

  The following are examples of criteria for determining the necessity of countermeasures.

  The number of attached organisms 71 obtained in the first attached organism coefficient processing (ST2) can be used as a reference. In this case, since it is not possible to determine the necessity of countermeasures by simply looking at the number of individuals of the attached organism 71, past results and experimental results (specifically, attached organisms after a predetermined time has elapsed in the attached organism observation container 5). The relationship between the number of 71 individuals and the number of individuals actually attached to the condensate system 3 after that) is also considered. Or, as will be described later, since the attached organism counting process (ST2) is repeatedly performed, the difference in the number of individuals and the change rate of the attached organisms 71 obtained at the time of each survey (ST2) can be used as a reference. It is also possible to determine an original judgment criterion in consideration of various circumstances in each plant and make a judgment according to this. These standards can be represented by a table in which the number of individuals of the attached organism 71 and the necessity of countermeasures are associated with each other, and are stored in the data storage unit 65.

  When the counting unit 61 obtains the number of the attached organisms 71, the determination unit 63 can determine the necessity of countermeasures by comparing this with a table stored in the data storage unit 65. The determination unit 63 stores the determination result in the data storage unit 65 and sends the determination result to the output unit 17. The output unit 17 presents the determination result sent from the determination unit 63 as an image or sound.

  And in the plant which installed the adhesion organism investigation system 1, when the necessity of a countermeasure is recognized in the result of discrimination | determination (ST3), the above-mentioned appropriate countermeasure of (1)-(5) can be performed. In addition to being able to examine the timing of future measures.

  After determining the necessity of countermeasure (ST3), it is determined whether or not the inside of the attached organism observation container 5 is to be washed (ST4). As a case where cleaning is necessary, when the glass plate 25 of the attached organism observation container 5 is completely covered with the attached organism 71, or other organisms (for example, hydroworms) adhere to the glass plate 25. This is the case when visibility deteriorates. In addition to this, the time interval for cleaning may be determined in advance.

  A method for cleaning the attached organism observation container 5 will be described. First, when the determination in ST4 is “YES”, that is, when the inside of the attached organism observation container 5 is washed, the upstream valve 13a of the investigation system 4 is closed to stop the introduction of seawater (ST5), and the downstream side The valve 13d is also closed. Then, after opening the valves 13b and 13c provided before and after the cleaning liquid circulation means 7, the pump 11 is operated to circulate the hydrochloric acid solution between the attached organism observation container 5 and the cleaning liquid storage tank 10, thereby attaching the attached organism. The inside of the observation container 5 is washed (ST6). The cleaning time is not particularly determined, and the cleaning may be performed until the attached organism (such as a vertical barnacle) 71 and other organisms attached to the inner surface of the container body 20 are completely removed.

  When the inside of the attached organism observation container 5 is cleaned or not cleaned (when the determination result of ST4 is “NO”), it is determined whether or not to end the investigation (ST7). Keeps the valve 13a firmly closed in order to block the inflow of seawater to the investigation system 4 side. On the other hand, when the survey is continued, the introduction of seawater is started or continued (ST1), and the procedures of ST2 to ST7 are repeated.

  Although the attached organism investigation method of the embodiment has been described above, the attached organism 71 is identified based on the difference between the light color of the attached organism 71 appearing on the image and the dark color of the other part (background) by the same method as described above. (ST14 to ST18), the ratio of attached organisms 71 occupying the image (FIG. 11) is obtained, and the necessity of countermeasures against attached organisms in the condensate system 3 can be determined from this ratio. Specifically, the counting unit 61 of the attached organism counting means 16 counts the number of white pixels constituting an area (for example, the areas 77a and 77b in FIG. 12C) representing the attached organism 71 on the image (FIG. 11). By counting, the sum of the areas of the respective regions representing the attached organisms can be obtained, and the ratio of the attached organisms 71 (specifically, the area of the region representing the attached organisms) in the entire image (FIG. 11) can be obtained. . Then, the determination unit 63 determines the necessity of countermeasures against attached organisms in the condensate system 3 based on the reference stored in advance in the data storage unit 65 and the ratio obtained by the counting unit 61. In this case, the criteria used for determining the necessity of countermeasures should be stored in the data storage unit 65 as a table, as in the case described above. In addition, when calculating | requiring the ratio of the adhesion organism 71 which occupies for an image, unlike the case of calculating | requiring the number of individuals of the adhesion organism 71 adhering to the glass plate 25, as shown to Fig.12 (a), several several which can be recognized as one lump on an image. Since there is no need to separate the regions, the contraction process (ST17) and the expansion process (ST18) by the contraction / expansion processing unit 60 can be omitted.

  Further, the survey system 4 may be directly taken from the sea instead of being branched from the condensate system 3. In this case, it is better to take water as close to the intake of the condensate system 3 as possible, rather than taking water in an arbitrary sea area.

  Although the upper surface of the container main body 20 (FIGS. 2 and 3) of the attached organism observation container 5 is made of a transparent glass plate 25 as an observation part, the glass plate 25 may be replaced with a transparent acrylic plate 24. Is possible. Moreover, in the Example, although the glass plate 25 which comprises the upper surface of the container main body 20 comprises the observation part, it is also possible to make other transparent parts, such as a side surface and a bottom face of the container main body 20, into an observation part. . Furthermore, in the embodiment, the container body 20 is made by combining the acrylic plates 24. However, as long as a transparent observation part can be provided on at least a part of the container body 20, the container body 20 is not limited to acrylic resin, and any other arbitrary (For example, vinyl, polyethylene terephthalate, etc.).

  Further, in the attached organism observation container 5 (FIGS. 2 and 3) of the embodiment, the unevenness provided on the inner surface of the container body 20 is plate-like on one surface of the glass plate 25 (the surface appearing inside the container body 20). It is formed by attaching a plurality of members 29, but the member located on the upper surface of the container main body 20 is replaced with a flat plate made of resin or the like, and the rear surface of the flat plate (the surface appearing inside the container main body 20) is appropriately selected. You may make it form by shaving this part.

  Furthermore, in the embodiment, each plate-like member 29 is attached with the same length as the inner width of the container body 20 (the length in the direction perpendicular to the flowing water direction), but may be shorter than this. However, you may attach the thing from which thickness differs. That is, any irregularity can be obtained as long as a concave portion to which a certain number of adhering organisms 71 can adhere is secured on one surface of the portion that forms the upper surface of the container body 20 when seawater is introduced (the surface that appears inside the container body 20). You can turn on.

  The container body 20 (FIGS. 2 and 3) of the attached organism observation container 5 of the embodiment is made of a transparent acrylic plate 24 except for the glass plate 25 forming the upper surface. It can be made using a material such as a dark-colored plate (for example, black or blue). As described above, the bottom of the attached organism 71 (the portion attached to the glass plate 25) is light (for example, white), and becomes the background of the attached organism 71 when the attached organism observation container 5 is viewed from above the glass plate 25. By darkening the portion (portion other than the glass plate 25 of the container body 20), the color of the attached organism 71 can be further emphasized, and a specific portion such as the attached organism 71 in the binarization process (ST14). Separation of the background (including the attached organism observation container 5 in the embodiment) and the background can be easily performed.

  In the embodiment, by applying the paste 30 made of attached organisms to the inner surface (glass plate 25) of the container body 20, an effect of increasing the number of attached organisms attached to the glass plate 25 is obtained. In addition, the same effect can be achieved by applying a liquid extracted from the attached organism to the glass plate 25. Specifically, this liquid is a liquid obtained by crushing attached organisms with a mortar or the like, wrapping this with a cloth or the like and squeezing (for example, filtering). Since this liquid is normally transparent and can maintain transparency even if it is applied to the glass plate 25, attached organisms other than barnacles (for example, mussels and hydroworms that stick out from the body) Can also be seen with certainty. Furthermore, an attached organism (which may be either a larva or an adult) may be attached to the inner surface (glass plate 25) of the container body 20 in advance. In this case, before the investigation is started, seawater is introduced from the introduction part 22 of the attached organism observation container 5, or a portion (for example, the glass plate 25) forming the upper surface of the container body 20 is immersed in seawater. The investigation should be started after confirming that the attached organism has adhered.

  In the embodiment, the paste 30 applied to the inner surface of the container body 20 may be colored to a color other than the color (white) of the bottom surface of the attached organism, such as red, blue, or black, by mixing colorants. As a result, when the attached organism adheres to the inner surface (glass plate 25) of the container body 20, the contrast between the white color of the attached organism and the surrounding dark color becomes clearer.

  In the embodiment, a 30% hydrochloric acid solution was circulated as an acidic liquid in order to remove attached organisms adhering to the inner surface of the container body 20. Any acidic liquid can be used as long as it can denature the adhesion protein secreted by the organism. Specifically, any of inorganic acids (hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid, etc.) and organic acids (acetic acid, lactic acid, benzenesulfonic acid, phenol, etc.) may be used. .

  The box 37 in which the container body 20 is installed can be replaced with a sealable one. In this case, a hole into which the imaging means can be inserted is preferably provided on the upper surface of the box 37. Moreover, it is preferable to attach an illuminating unit that emits a flash in accordance with the imaging timing to the imaging unit. Thereby, the difference between the pale color (for example, white) of the adhering organism attached to the inner surface of the container main body 20 and the dark color of the other part (background) can be further emphasized.

In the embodiment, the CCD camera 15 is used as the image pickup means, but a CMOS image sensor (Complementary Metal Oxide Semiconductor Image) is used as the image pickup device.
Any imaging means such as a digital camera using a sensor) can be employed. In addition to this, an image scanner 81 can be employed as the imaging means, as shown in FIGS. In this case, as shown in the figure, the image scanner 81 is turned upside down with the lid 82 open, and the imaging surface of the main body 83 (the lower surface of the main body 83 in the figure) is the upper surface of the attached organism observation container 5. Can be contacted. Further, the image scanner 81 and the attached organism counting means 16 can be connected by a communication cable 85 so that the imaging control unit 55 controls the operation of the image scanner 81. A method for processing an image picked up by the image scanner is the same as that in the case of using the CCD camera 15 described above. Further, when the image scanner 81 is used, the side surface and the lower surface of the container main body 20 of the attached organism observation container 5 are colored or covered with appropriate means such as dark paper or cloth, or the container main body among the imaging surfaces of the main body 83. An image suitable for the above-described image processing can be obtained by previously covering the portion that does not come into contact with 5 with an appropriate means. The image scanner 81 is a general scanner device that generates image information by illuminating an object to be imaged and converting the intensity of the reflected light into a magnitude of current.

  In the attached organism research apparatus 8 of the embodiment, the observation unit for attaching and observing the attached organism is composed of a glass plate 25 that forms a part of the attached organism observation container 5 (upper surface in the embodiment). An observation section can be provided in the pipeline itself constituting the investigation system 4. Specifically, a hole suitable for observation is provided in a part of the pipeline, and the hole is covered with a transparent material such as glass or acrylic. In this case, the observation unit is not limited to a flat plate shape like the glass plate 25 of the embodiment, and can be made in a curved state according to the shape of the pipe line.

  Further, the output unit 17 (FIGS. 1 and 5) of the attached organism research apparatus 8 can be connected to a computer installed at a location distant from the attached organism research system 1. In this case, calculation results such as current or past data and discrimination results obtained by the attached organism counting means 16 can be read by a computer via an appropriate communication medium such as a communication cable or a communication line. Alternatively, the output unit 17 may employ a printing device such as a printer instead of the monitor and the speaker. Further, the attached organism counting means 16 may be a computer main body, and a monitor or a speaker may be employed as the output unit 17.

The figure which shows the adhesion organism investigation system for enforcing the adhesion organism investigation method of an Example. The perspective view of the adhesion organism observation container of an Example. AA sectional view taken on the line AA of FIG. The figure which shows the arrangement structure of an adhesion organism observation container and a CCD camera. The figure which shows the flow of the signal in a structure of an adhesion organism investigation apparatus and an adhesion organism investigation apparatus. The flowchart of the adhesion organism investigation method. The flowchart of an adhesion organism count process. The figure which shows the adhesion condition of the adhesion organism in the glass plate of the adhesion organism observation container image | photographed with the CCD camera. The figure which shows the relationship between a density histogram and the threshold value used as the reference | standard of a binarization process. The figure which shows the state which carried out the binarization process of the image of FIG. The figure which shows the state which backgrounded the pixel showing an adhering organism observation container on the image, and specified the area | region showing the adhering organism which is a count object. The figure which shows the method of a contraction process and an expansion process. The figure which shows the state which employ | adopted the image scanner as an imaging means. The figure which shows the state which made the image scanner contact the upper surface of an adhesion organism observation container.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Adhesive organism investigation system, 3 ... Condensate system, 4 ... Investigation system, 5 ... Adherence organism observation container, 7 ... Cleaning liquid circulation means, 8 ... Adhesion organism investigation apparatus, 10 ... Cleaning liquid storage tank, 11 ... Pump, 13a , 13b, 13c, 13d ... valve, 15 ... CCD camera, 16 ... attached organism counting means, 17 ... output part, 20 ... container body, 22 ... introduction part, 23 ... discharge part, 24 ... acrylic plate, 25 ... glass plate 27 ... Screw, 29 ... Plate-like member, 30 ... Paste, 31 ... Groove, 33, 34 ... Tube, 37 ... Box, 39 ... Hole, 40 ... Camera holder, 41 ... Cable, 43 ... Pole, 44 ... Pole Fixed member 45 ... Camera fixing member 47, 50a, 50b ... Hole, 48, 51 ... Bolt, 53 ... Adjustment screw, 55 ... Imaging control unit, 56 ... Shading correction unit, 57 ... Binarization processing unit, 58 ... Noise removal unit, DESCRIPTION OF SYMBOLS 9 ... Filter application part, 60 ... Shrinkage expansion process part, 61 ... Counting part, 63 ... Determination part, 65 ... Data storage part, 67 ... Data processing part, 69 ... Input part, 71 ... Adherence organism, 75a, 75b, 76a , 76b, 77a, 77b ... area, 81 ... image scanner, 82 ... lid, 83 ... main body, 85 ... communication cable.

Claims (12)

An attached organism investigation device for investigating the habitat of attached organisms attached to rocks and walls in water,
A transparent observation part having a contact surface with water in which the attached organism may exist;
An image scanner that images the contact surface from the opposite side and generates the image ;
An attached organism counting means for counting and outputting attached organisms on the image,
The surface of the observation unit in contact with water has irregularities in a direction substantially perpendicular to the direction of water flow.   2. The attached organism investigation device according to claim 1, wherein a surface of the observation unit that comes into contact with water has unevenness in a direction substantially perpendicular to a direction of water flow, and a paste obtained by grinding the attached organism is applied to the recessed portion. An attached organism investigation device characterized by being made.   The attached organism research device according to claim 1 or 2, wherein the attached organism counting means specifies and counts the attached organism based on a difference between a color of the attached organism on the image and a color of another portion. An apparatus for investigating attached organisms.   The attached organism research device according to claim 1 or 2, wherein the attached organism counting means counts or instead of the attached organisms, and the difference between the color of the attached organism and the color of other parts on the image. The attached organism investigation device characterized in that the attached organism is identified and the ratio of the attached organism in the image is obtained and output.   5. The adherent organism investigation device according to claim 1, wherein the observation unit is a part of a container including the water introduction unit and the discharge unit.   6. The attached organism research apparatus according to claim 1, wherein the attached organism is a barnacle or a mussel.   7. The apparatus for surveying attached organisms according to claim 1, wherein the water is water taken in a power plant or other plant that uses water.   8. The apparatus for investigating attached organisms according to claim 7, wherein the attached organisms are removed or prevented from adhering to a path through which the water flows based on the number of attached organisms on the image or the proportion of attached organisms in the image. A device for investigating attached organisms, comprising a determination unit that determines whether or not to take measures against the above. A method for investigating attached organisms for investigating the habitat of attached organisms attached to rocks and walls in the water,
One surface of the transparent observation part is brought into contact with water in which the attached organism can exist, and an image obtained by viewing the surface from the opposite side is generated using an image scanner, the attached organism on the image is counted, and the observation is performed. The method for investigating attached organisms, characterized in that the surface of the part in contact with water has irregularities in a direction substantially perpendicular to the direction of water flow.   10. The method for investigating attached organisms according to claim 9, wherein the surface of the observation unit that contacts water has irregularities in a direction substantially perpendicular to the direction of water flow, and the paste is applied to the recesses by grinding the attached organisms. A method for investigating attached organisms, characterized by   11. The method for investigating attached organisms according to claim 9 or 10, wherein the number of attached organisms is obtained by identifying the attached organisms based on the difference between the color of the attached organisms on the image and the color of other parts. A method for investigating attached organisms.   The attached organism investigation method according to claim 9 or 10, wherein the attached organism is specified based on a difference between a color of the attached organism on the image and a color of another portion in addition to counting or instead of the attached organism. And a method for investigating attached organisms, wherein a ratio of the attached organisms in the image is obtained.

Images