JP2003139764A - Water quality detector using fish - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide technology allowing detection continuously for a long period, even when an alga is generated in a water vessel for detecting water quality, capable of enhancing detection precision, and capable of reducing an installation area. SOLUTION: In this water quality detector wherein fishes inhabited in the water vessel for passing raw water continuously are monitored all the time by a monitor camera, and wherein a behavior run out of a sound existence behavior pattern set preliminarily in an automatic detection circuit is detected to determine the raw water as water not suitable for service water, the monitor camera 13 photographs the fishes 10 while looking through a water surface 23 from an upper opening part of the water vessel 12, the fishes have positive rheotaxis, and an automatic detection circuit unit 3 monitors the number of the fishes within a monitoring range set in an upstream of the water vessel 12 overlooked on a monitoring screen, so as to output an alarm signal when the monitored number is fluctuated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for detecting abnormal water quality by constantly monitoring with a video camera a fish kept in raw water taken from a river or the like and analyzing a monitor image of the fish. In particular, the present invention relates to a water quality detection device using fish, which can achieve long-term continuous detection, improvement in detection accuracy, and reduction in installation area.

[0002]

2. Description of the Related Art Toxic substances such as organochlorine compounds such as PCB (polychlorinated biphenyl), mercury, cadmium, etc. are contained in raw water taken from rivers and lakes as drinking water.
It is possible that harmful heavy metals such as lead and zinc, the worst dioxin in the history, potassium cyanide and pesticides that are acute poisons will be mixed in. For this reason, it is very important to control the quality of raw water taken from rivers and lakes as drinking water, and 24-hour continuous monitoring is required. It is very difficult for surveillance personnel to monitor for 24 hours, so in order to inspect this poison, conventionally, a part of the raw water was always drawn into the aquarium and the fish that lived in it were photographed with a surveillance camera for 24 hours. In addition, there is a device that automatically detects an abnormality by pattern recognition of fish that processed the image signal of this surveillance camera. This water quality detection device uses fish, raw water is made to flow through an aquarium made of a transparent plate such as glass on at least one side, and the behavior of fish living in the aquarium is monitored from the transparent side. The behavior pattern of the fish is constantly monitored by photographing with a camera, and when there is an abnormality in the behavior pattern of the fish, an alarm is automatically issued.

[0003]

However, when raw water from rivers and lakes is allowed to flow into a monitoring tank, various nutrients contained in the raw water are photosynthesized by external light, which rapidly generate as algae for monitoring. It adheres to the glass surface of (the transparent plastic tends to attach algae faster than the glass). 1. Therefore, in the conventional water quality detection device using the surveillance camera, the surveillance camera is in a state of monitoring the fish through the green blind, and it becomes impossible to take an image with the surveillance camera in a short period of time. Particularly in summer, algae start to adhere to the glass surface in a few days, and in a week, fish adhere to such a degree that the fish cannot be monitored. Due to this, the following problems further occur. The supervisor needs to clean the aquarium frequently, which requires extra labor and cost. Since it is not possible to monitor during cleaning of the aquarium, it is unknown whether there is any abnormality in the raw water during cleaning. Cleaning the aquarium drains the physical strength of the fish, making normal monitoring difficult. 2. In the conventional device, a surveillance camera was installed on the side of the aquarium and the fish in the raw water was monitored through the side glass of the aquarium. It was 3. In addition, while the fish being monitored show positive flowability when the raw water is normal, when abnormalities occur, various patterns such as nose lift behavior, mad behavior, repellent behavior, and rollover behavior are subtly analyzed and selected. However, in the conventional monitoring device, when it is actually fed, it is floated on the surface of the water when it is fed. There is a problem that the original behavior of fish may be judged as an abnormal behavior, and an erroneous alarm may be issued, such as misidentifying the behavior as a behavior and misidentifying it as a crazy behavior when swimming by being surprised by noise. 4. Carcasses of small fish such as medaka tend to float on the bottom surface at the beginning of death and on the water surface after some time passes, and when the automatic detection circuit counts this as living fish, it outputs the wrong result There is a fear. 5. Raw water is constantly flowing into the aquarium, but if the amount of inflow is smaller than the number of fish, oxygen becomes insufficient and the life of the fish becomes shorter, and the fish must be replenished to maintain a continuous operating state. Had a problem that it took time. 6. When the water temperature becomes low, there is a problem that the activity of fish becomes dull or hibernation occurs, and the reliability of detection may not be obtained. 5. Raw water from rivers and lakes is always BOD depending on the weather and temperature.
(Biochemical oxygen demand) is changing, but among small fish, small medaka (a kind of medaka) also changes its behavior due to changes in BOD. Even if you want to select larger fish, such as locusts, hibuna, juvenile carp, etc., the conventional device used an algorithm that was limited to a single fish, so it could not be changed immediately, which is not practical. was there.

The present invention has been made to solve the above problems, and its purpose is to:
To provide a water quality detection device using fish, which enables continuous detection for a long period of time even if algae are generated in a detection water tank, and can improve detection accuracy and reduce the installation area. It is in. Another object of the present invention is to select an appropriate fish from a plurality of fishes according to the difference in BOD concentration of raw water and to enable an appropriate detection immediately by an algorithm capable of dealing with various fishes. It is to provide a high-performance water quality detection device.

[0005]

As a means for solving the above-mentioned problems, in a water quality detecting device using fish according to claim 1 of the present invention, the raw water taken in is continuously passed through a water tank, The fish inhabiting the aquarium are constantly monitored by a surveillance camera, and it is detected that the fish being monitored behaves outside the healthy living behavior pattern set in advance in the automatic detection circuit, and the raw water is not suitable for water use. In the water quality detection device adapted to determine that the fish is the one, the monitoring camera is arranged so as to photograph the fish through the water surface through the upper opening of the water tank.

A water quality detecting device using fish according to claim 2 is the water quality detecting device using fish according to claim 1, wherein the fish is a fish having positive flowability, The automatic detection circuit is characterized by monitoring the number of fish within the monitoring range set in the aquarium on the monitor screen and outputting an alarm signal when the number of monitoring changes.

In the water quality detecting device using fish according to claim 3, in the water quality detecting device using fish according to claim 2, the automatic detection circuit is within a monitoring range set on the upstream side of the water tank. An alarm signal is output when the number of monitored fish is decreased.

In the water quality detecting device using fish according to claim 4, in the water quality detecting device using fish according to claim 2, the automatic detection circuit sets the monitoring range set on the upstream side of the water tank. It is equipped with a detection unit for monitoring and a detection unit for monitoring the monitoring range set on the downstream side, and when there is a decrease in the number of fishes monitored by the upstream detection unit or an increase in the number of fishes monitored by the downstream detection unit. It is characterized by outputting an alarm signal when there is.

A water quality detecting device using fish according to claim 5 is the water quality detecting device using fish according to claim 1 or 2, wherein the aquarium is formed by bending four corners. It is characterized by being

In the water quality detecting device using fish according to claim 6, in the water quality detecting device using fish according to claim 5, the aquarium prevents the carcasses of the fish from moving in the water flow. It is characterized in that the trapping material of the carcass is arranged.

A water quality detecting device using fish according to claim 7 is the water quality detecting device using fish according to any one of claims 1 to 6, wherein the water tank is the water tank. In addition, a filter device for filtering raw water before water supply is provided.

The water quality detecting device using fish according to claim 8 is the water quality detecting device using fish according to any one of claims 1 to 7, wherein the water tank is submerged in water. It is characterized in that it is provided with the air supply device.

The water quality detecting device using fish according to claim 9 is the water quality detecting device using fish according to any one of claims 1 to 8, wherein the water temperature of the water tank is adjusted. Is equipped with a heater for.

The water quality detecting device using fish according to claim 10 is the water quality detecting device using fish according to any one of claims 1 to 9, wherein the water tank is automatically fed. It is characterized by having a device.

A water quality detecting device using fish according to claim 11 is the water quality detecting device using fish according to any one of claims 1 to 10.
It is characterized in that the water tank has a plurality of raw water inlets side by side.

The water quality detecting device using fish according to claim 12 is the water quality detecting device using fish according to any one of claims 1 to 11.
The water tank is characterized in that the floor surface is inclined downward from the raw water inlet to the raw water outlet.

The water quality detecting device using fish according to claim 13 is the water quality detecting device using fish according to any one of claims 1 to 12.
When the surveillance camera is provided with a zoom lens or an interchangeable lens, and when the size of the aquarium is selected according to the size of fish body and / or the number of inhabitants suitable for detecting the raw water, adjustment of the zoom lens in the surveillance camera or It is characterized in that the positions of the water tank and the surveillance camera are always kept at a fixed position by exchanging the lenses.

A water quality detecting device using fish according to claim 14 is the water quality detecting device using fish according to any one of claims 1 to 13.
The automatic detection circuit divides the luminance signal of one screen imaged by the surveillance camera into a large number of dots to which horizontal and vertical addresses are given, and forms a detectable dot, which is collectively stored in a block arranged in a large number of rows and columns. At the same time, the blocks within the monitoring range of the same screen and the screen after the lapse of an arbitrary time are compared with each other, and an alarm signal is output when the level of the change of the luminance signal is outside the preset range.

In the water quality detecting device using fish according to claim 15, in the water quality detecting device using fish according to claim 14, the automatic detection circuit is a color signal from a video signal of the surveillance camera. , A clamp circuit for inputting an output signal of the color burst removal circuit to output a luminance signal with a constant voltage, and an output signal of the clamp circuit for a horizontal synchronization signal and a vertical synchronization signal. An input synchronization separation circuit for separation and an A / C for converting the output signal of the clamp circuit into a digital signal
A D conversion circuit, and a detection processing circuit that generates horizontal and vertical addresses based on the horizontal synchronization signal and the vertical synchronization signal and sets horizontal and vertical detection dots in a digital output signal of one screen of the A / D conversion circuit. , Each detection dot is assigned as an address, the total number and arrangement of detection dots are stored in a memory, and the brightness signal of the screen currently being output is changed with respect to the change level of the brightness signal preset in each detection dot or block. And a microcomputer that outputs an alarm signal to the detection processing circuit when is out of the range.

The water quality detecting device using fish according to claim 16 is the water quality detecting device using fish according to claim 15, wherein the microcomputer includes 1
An external operation switch for setting the level of change of the luminance signal is connected to the detection dot or block in the screen, and a superimpose circuit is connected between the microcomputer and the video signal output circuit. Characterize.

The water quality detecting device using fish according to claim 17 is the water quality detecting device using fish according to claim 16, wherein the microcomputer has a function of selectively detecting the dots or blocks. Is connected to a personal computer or / and a sequencer.

A water quality detecting device using fish according to claim 18 is the water quality detecting device using fish according to any one of claims 14 to 17, wherein one block is provided. It is characterized in that it is set to a size that can surround the height of the fish of.

In the water quality detecting device using fish according to claim 19, in the water quality detecting device using fish according to claim 18, the automatic detection circuit is a degree of danger depending on the number of fish that survive. Is provided in a stepwise manner.

The water quality detecting device using fish according to claim 20 is the water quality detecting device using fish according to claim 19, wherein the water tank, the monitoring camera, the automatic detection circuit, the filter device, and the air supply. It is characterized in that a set of the device, the heater, the automatic feeding device, and the monitor device is housed in a portable cabinet.

[0025]

In the water quality detecting device using fish according to the first aspect of the present invention, the fish is photographed from the upper opening of the water tank. Then, only raw water is present between the fish and the surveillance camera, and the surveillance camera monitors the fish through the surface of the raw water passing through the tank. Therefore, in the invention according to claim 1, even if the various nutrients contained in the raw water are photosynthesized by the external light and rapidly generate as algae and adhere to the aquarium wall, the fish body can be clearly defined forever. You can shoot with
Accurate monitoring can be continued for a long period of time. Further, this eliminates the need for the supervisor to clean the water tank, thus eliminating extra labor and cost. There are no drawbacks such as not being able to detect abnormalities in the raw water during cleaning of the aquarium, and cleaning the aquarium exhausting the physical strength of the fish and making normal monitoring difficult. . Further, since the surveillance camera is installed above the water tank, there is no protrusion to the side of the water tank, and the effect that the installation area of the entire device can be made extremely small is obtained.

In the water quality detection device using fish according to claim 2, claim 3, or claim 4, the automatic detection circuit detects a change in the number of fish within the monitoring range set in the water tank to detect water quality. When the monitoring range is set on the upstream side of the aquarium, there is no change when all fish maintain positive runtability due to the inflow of raw water, that is, there is no change in water quality. It can be seen that when the fish weaken or die, the fish flow to the downstream side and the number of fish in the upstream monitoring range decreases, that is, the water quality fluctuates. In addition, when the monitoring range is set on the downstream side, the number of fish has increased due to the invasion of the fish, and it can be seen that the water quality also fluctuated. Therefore, in the inventions according to claims 2 to 4, first, since the detection is performed by a plurality of fish, the inspection accuracy is improved. By making the water depth shallow within the range where fish can live, it becomes possible to arrange them side by side, and it is possible to monitor the state of all fish. The detection is made based on whether or not there is an initial set number of fish within the monitoring range on the upstream side or the downstream side of the aquarium, and the nose lifting action, rollover action, and frenzy action based on the original behavior of the fish were detected. The effect of not issuing an alarm can be obtained.

In the water quality detection device using fish according to the fifth aspect, the raw water introduced into the water tank forms a clean circulation flow along the curved portions of the four corners. Therefore, according to the invention described in claim 5, the water in the aquarium does not flow neatly and does not give stress to the fish, so that the same fish can be used for a long period of time.

In the water quality detecting device using fish according to the sixth aspect, the water flows so as to swirl in the water tank whose four corners are curved. Therefore, if the fish dies, the water flows along the flow. The shed carcass is blocked by a hooking material formed of a net or the like, and is prevented from moving in the same manner as a living fish, and remains in a fixed state until it is discharged to the outside. Therefore, in the invention according to claim 6, when a fish dies, it is immediately brought into a state in which it can be discriminated from the surviving fish, and this has the effect of enabling highly accurate continuous detection. To be

The water quality detecting device using fish according to any one of claims 7 to 10 is for improving the living environment of the fish to be used, and the water quality detecting device using fish according to claim 7 Wastes contained in raw water are filtered to introduce highly transparent water. In the water quality detection device using fish according to the eighth aspect, the dissolved oxygen in the water in the water tank is maintained so as not to be insufficient. In the water quality detecting device using fish according to the ninth aspect, the temperature of the water in the water tank is maintained so as not to fall below the temperature preferred by the fish. In the water quality detection device using fish according to the tenth aspect of the present invention, the bait preferred by the fish is periodically introduced into the aquarium so that the fish can maintain the bait necessary for survival. Therefore, in the inventions according to claims 7 to 10, the living environment is maintained so that the fish used for detection do not die due to factors other than the detection substance, and the life is maintained for a long time. It is possible to obtain an effect that highly accurate detection can be performed over a long period of time without being applied.

In the water quality detection device using fish according to the eleventh and twelfth aspects, since the inflow ports of the raw water are arranged side by side in the water tank, the fish are appropriately detected so that they can be clearly detected one by one. It will be in a scattered state. Therefore, in the inventions of claim 11 and claim 12, compared with the conventional water quality detection device in which the inlet to the water tank is not specially devised,
Further, the detection accuracy can be improved. In addition, because the floor of the aquarium has a slope that descends to the downstream side, weakened or dead fish should move quickly to the downstream detection range due to the action of water flow and gravity, and perform quick detection. You can Further, since the surveillance camera can photograph the entire length of the horizontal posture, it is possible to obtain an effect such as reliable detection.

In the water quality detecting device using fish according to the thirteenth aspect, when it is desired to use a fish larger than the fish when detecting the water quality using a small fish such as an medaka, or When it is desired to increase or decrease the number of inhabitants, the water tank can be sized accordingly, and the lens of the surveillance camera can be replaced or the zoom lens can be adjusted to make the shooting range the same as before. Therefore, claim 13
In the invention described in (3), even if any fish is adopted so as to match the condition of the water quality test, it can be detected by a single algorithm, and appropriate measures can be easily taken. The effect is obtained.

In the water quality detection apparatus using fish according to claim 14 and claim 15, since the image of one screen is made into detection dots and the detection dots of the whole one screen are made into blocks, the change level of the old and new images is changed. Settings can also be made in block units. Then, the change levels of the old and new images can be compared in block units. Therefore, claim 1
4. In the invention of claim 15, in the block unit setting, the detection range in which the inflow side of the raw water is the upstream side, the detection range in which the outflow side of the raw water is the downstream side, or the intermediate zone thereof is detected. It is possible to obtain an effect that an extremely accurate detection can be performed by setting an unnecessary range or the like so that the detection is easy.

In the water quality detecting device using fish according to the sixteenth, seventeenth and eighteenth aspects, various settings are made by an external operation switch, a personal computer (hereinafter referred to as a personal computer), a sequencer or the like. Of these, for example, an external operation switch is used to set the level of change in the brightness signal in a detection dot or block in one screen, and in a personal computer or a sequencer, the number of detection blocks or the number of detection dots, or a block encloses one fish. There are settings such as making it as large as possible. Therefore,
In the inventions of claims 16, 17, and 18, precise setting can be performed automatically and reliably by performing detailed setting.
Further, the above setting can be performed on the monitor screen via the superimpose circuit, and the setting range, the number of fishes, the date and time, etc. can be displayed on the screen.

In the water quality detection device using fish according to claim 19, the automatic detection circuit gives a stepwise notification by a notification means such as a lamp, a buzzer, or a monitor screen depending on the number of living fish. . Therefore, in the water quality detecting device using fish according to claim 19, according to the notified stage, for example, numerical values such as 1, 2, 3 and the like, colors such as red, yellow and blue, and buzzer sounding intervals. The effect is that the current state of raw water can be immediately grasped.

In the water quality detecting device using fish according to claim 20, a portable cabinet containing a set of a water tank, a monitoring camera, an automatic detection circuit, a filter device, an air supply device, a heater and an automatic feeding device. Is installed by transporting it to a water source that requires water quality inspection, and is connected to a water supply / drainage pipe and a power source so that it can be used. Therefore, in the water quality detection device using fish according to claim 20, a water source that requires a water quality test for toxicity, such as a water bureau, a food maker, a beverage or brewing maker, and a drug maker, manages the water. It is possible to easily provide a water quality detection device near the water source and obtain an accurate detection result easily.

[0036]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows the overall configuration of the device according to the first embodiment, in which 1 is an auxiliary tank, 2 is a sensor unit, 3 is an automatic detection circuit unit, 4 is a monitor TV, 5 is an alarm device, and 5a is an alarm. Buzzer, 5b
Is an alarm lamp. The auxiliary tank 1 includes an external intake pipe 7, a drain pipe 8 for taking in the raw water 6 from a river (not shown),
It has an overflow pipe 9 and the like.

The sensor unit 2 is for constantly monitoring the state of the fish 10 living in the flowing raw water 6 while swimming, and is a unit case 11 for shielding external noise, etc. It comprises a water tank 12 installed on the floor of the case 11, a surveillance camera 13 installed on the ceiling side above the center of the water tank 12, and a fluorescent lamp 14 for illumination fixed to the ceiling.
It should be noted that this illumination can be set arbitrarily inside the water tank, at the bottom, at the side, and the like. Further, a change filter or the like can be attached to the lens of the surveillance camera as appropriate.
The unit case 11 has a door with a monitoring window on its side,
The fish in the aquarium are set so as not to be surprised by external noise. The size of the aquarium 12 is set according to the size of the fish 10 and the number of inhabitants, and in particular, the aquarium 12 is replaceable. The water tank 12 has a shallow water depth and an open upper surface, has an internal water intake pipe 15 and an inflow port 16 communicating with the auxiliary tank 1 on the front side, and a drain port 17, a drain pipe 18 on the rear side. A drain pipe 19 and an overflow pipe 20. In addition, in the water tank 12, the water depth on the drain port 17 side is the inflow port 1
The floor surface 21 is inclined so as to be deeper than the water depth on the 6th side. As the surveillance camera 13, a color television camera is used, and a replaceable manual aperture lens 22 is attached.

The automatic detection circuit unit 3 is for inputting a video signal from the surveillance camera 13 to detect an abnormality in raw water from the state of fish, and will be described with reference to the automatic detection circuit shown in FIG. In the figure, reference numeral 30 denotes a color burst elimination circuit, and in the case of a color surveillance camera, only a luminance signal is necessary for detection, and therefore, the color signal included in the video signal from the surveillance camera 13 is removed in advance here. Of. Although color surveillance cameras are now in widespread use, removing the color signals for processing simplifies circuit design and can be provided at low cost. Reference numeral 31 denotes a clamp circuit, which pedestal clamps the video signal so that the sync level does not change due to a change in the image, keeps the voltage constant, and outputs the luminance signal. Reference numeral 32 denotes an input sync separation circuit, which separates the luminance signal into a horizontal sync signal and a vertical sync signal. 33 is an 8-bit A / D
The conversion circuit converts the luminance signal output from the clamp circuit into a digital signal and allocates it in 8 bits in the range of 3V to 5V.

Reference numeral 34 is a detection processing circuit composed of a prograndmable logic device (CPLD) having a large gate scale, which inputs horizontal and vertical sync signals of the input sync separation circuit 32, and generates horizontal address, vertical address, etc. Then, one screen of the luminance signal is divided into a large number of detection dots to which horizontal and vertical addresses are given, and stored in the RAM 35 as a video memory. Further, the alarm processing is performed in cooperation with a microcomputer (hereinafter, referred to as a microcomputer) 36 described later.

Reference numeral 36 denotes a microcomputer, which is assigned as an address at the same time when the detection dots are set and stores the number and arrangement of all the detection dots. The detection dots are grouped into blocks by an arbitrary number. 64 detection dots of 8 × 8 are arranged in one block. Figure 3 shows a screen with detection dots set on a monitor TV.
Reference numeral 37 is a detection dot, and 38 is a block. in this case,
Although only the outer frame 39 is displayed on the screen of the monitor TV, 64 detection dots are actually arranged. The number of blocks 38 is set to 8 × 7 = 56. Therefore, the total number of detection dots is 64 × 56 = 3584.
Within this range, the microcomputer 36 detects that the surveillance camera 13
By specifying the number of detection dots and the number of detection blocks occupied by the fish caught by, there is a function to prevent false alarms. In addition, in block 38, block 4 that needs to be detected
It has a function of specifying 0 and a block 41 not requiring detection, and adjusting the detection sensitivity of the detection dot or the detection block. In the figure, 42 indicates a cursor. The number of detection dots, the arrangement of blocks, the number, sensitivity, etc. are programmed in the built-in ROM 43.

The microcomputer 36 stores the sequentially input 8-bit digital signal for one field as sampling data in the RAM 35 as a video memory, and sets the timing once every 2 to 14 fields (Speed setting) by setting. The data processing is performed while comparing the sampling data of two sheets. In this data processing, the microcomputer 36 does not give an alarm if the change in the brightness level is within the set value while always checking the data written in the RAM 35, and when the change is outside the set range,
An alarm signal is output via the detection processing circuit 34.

Reference numeral 44 is a superimposing circuit for displaying characters such as month, day, hour, minute, block setting and brightness level setting on the monitor screen of the monitor television 4.
In addition, the operation switch 45, the sequencer (pro-grandmable controller) 46, or the interface 4
Various settings are made by operating the personal computer 48 or the like via 7. The interface 47 is based on the RS-232C standard for serial binary data transmission with a microcomputer so that the sensor function can be turned on and off and the sensitivity can be adjusted by operating a personal computer. Reference numeral 49 is a video signal output circuit, 50 is an output synchronization separation circuit for separating the video signal output from the video signal output circuit 49 into horizontal and vertical synchronization signals and outputting the same to a superimpose circuit, and 51 is an external alarm device 5. An alarm relay 52 to be connected is a backup RAM.

Next, the function and effect of this embodiment will be described. First, as a fish used for water quality detection, if the BOD of raw water to be taken in is low, medaka fish is used for monitoring.
In the case of raw water with a high BOD, fish larger than medaka fish, such as locusts, hibuna, and carp juveniles, are selected.
Next, the aquarium 12 has different sizes suitable for small fish and larger fish, but the size of the sensor unit 2 is not changed, that is, the distance between the aquarium 12 and the surveillance camera 13 is not changed. Make the aquarium available.
In this case, small fish can be stored in a small aquarium.
Select a lens with a large focal length, and use the sensor unit 2
The size of the water tank that fits within the comprehensive angle of the lens is set at the water tank installation position. Conversely, for large fish, select a lens with a small focal length and set it to a size that fits within the included angle. In this way, if the water tank is manufactured according to the comprehensive angle of the lens, any water tank imaged by the surveillance camera can be properly stored on the entire screen of the TV monitor.

Specifically, in the case of medaka, the focal length is 12
Using a lens of mm, the size of the water tank is set so that the comprehensive angle is set to 29.9 degrees horizontally and 22.6 degrees vertically and the height of one medaka fish is within one block. For larger fish such as locusts and hibuna, the focal length is 6 mm (horizontal angle horizontal 56.14 degrees, vertical 43.6 degrees) and focal length 3.5 mm (horizontal angle horizontal 84.8 degrees, vertical 68.8 degrees).
Interchangeable lens etc. can be used.

Next, the setting operation is performed. Operation switch 4
5. By operating the sequencer 46, the personal computer 48, or the like, the allowable number of medaka showing normality, the setting of the brightness level, the detection range in the water tank by the block, and the like are performed on the monitor TV screen. In the above setting, the detection dot 37 and the detection range of the block 38 are freely set by the monitor. In the present embodiment, as shown in FIG. 3, the detection block 4 includes three rows of blocks on the side where the raw water 6 flows (four dots are shown inside the block).
0 and others are set as detection unnecessary blocks 41 (only the outer frame of the block is shown). Further, even if only one detection dot is detected, it is set to detect only when several dots are touched at the same time. Fish do not always swim only in one block, and sometimes swim across two blocks, so limit the number of detection dots in the block,
Detect only one when more than one touches at the same time. By setting this, even if one fish straddles two blocks, it is not judged that two fish are detected.

Next, the detection procedure will be described. First, with the above settings, the monitoring camera 13 monitors the medaka 10 through the water surface 23 from the upper surface of the water tank 12. The medaka 10 has a positive flowability with respect to the raw water 6 flowing in from the inflow port 16. In the present embodiment, as shown in FIG. 3, four medaka fishes are put in and monitored, but if the water quality is normal, the medaka fishes are also normal. By swimming in the detection block 40 and counting the set number of dot clusters at the set brightness level in the circuit, four fish detection signals are output.
When one of these four animals loses swimming due to an abnormality, the weakened medaka is washed away to the drain 17 side. At the drain outlet 17 side, no matter how many times the medaka 10 swims, it is not detected only by the arrangement of the block 41 that does not need to be detected. Therefore, it is not possible to count dots with a brightness level of one fish in the circuit, and fish can be detected. There are 3 signals. In this case, an alarm is issued indicating that there is an abnormality in the water quality. However, the observer should give an alarm of water quality abnormality when one of the animals is abnormal and only three are swimming in the normal position. It becomes practically easy to use if the observer can select whether or not it is off. In this case, the observer sets an appropriate algorithm according to the judgment, such as one abnormal animal and two abnormal animals.

As described above, in the water quality detecting device using the medaka of the present embodiment, since the medaka 10 is directly photographed by the monitoring camera 13 through the water surface, algae adhere to the aquarium wall. Regardless of what you do, you can clearly shoot medaka fish forever and keep accurate monitoring for a long time. The observer does not need to clean the aquarium 12, which saves extra labor and cost. Aquarium 1
Even if there is something wrong with the raw water 6 during the cleaning of 2,
Cleaning the water tank eliminates the drawbacks such as the exhaustion of the medaka fish and the difficulty of normal monitoring. . Since the monitoring camera 13 is installed above the water tank 12, there is no protrusion to the side of the water tank, and the installation area of the sensor unit 2 can be made extremely small. It does not give a false alarm by detecting nose-up behavior, rollover behavior, or mad behavior based on the original behavior of fish. In addition, it is possible to detect with a single algorithm, and it is possible to easily take appropriate measures. By making the detection block 40 large enough to surround one medaka 10, it is possible to obtain an effect such that accurate detection can be performed. By making the aquarium shallow, the fish come close to the surface of the water, and because it does not double up and down, it has the effect of clearly detecting fish in any location compared to the side-capture type aquarium. In addition, the retention time of water is shortened, so that feces and debris flow out quickly, algae are hard to attach, and water does not rot.

Next, a second embodiment shown in FIGS. 4 and 5 will be described. In the description of the present embodiment, when there is the same part as that of the first embodiment, the same reference numeral is given and the specific description is omitted. FIG. 4 is a plan view showing the water tank unit 60 of the second embodiment, and FIG. 5 is a sectional view taken along the line CC of FIG. As shown in the figure, the aquarium unit 60 includes a first room 61, a second room 62, and a third room 63.
Are placed in communication with each other through the circulation ports 64, and the third
A water tank 66 in which the killifish 65 live is arranged on the downstream side of the room 63. The first room 61 has a raw water inlet 6
7 and an overflow port 68 are opened. In the second room 62, a waterproof electric heater 69 for adjusting the water temperature is installed in the lower part. In the third room 63, a submersible pump 70 that supplies the raw water of this room to an adjacent water tank 66 is installed. Reference numeral 71 denotes its discharge port, which is arranged in the lower part of one corner portion of the water tank 66 in the direction along the wall.

The water tank 66 is formed in a substantially elliptical shape by bending the four corners of the peripheral wall. The water tank 66 is provided with a recovery hole 72 for recovering the corpses 65a of the killifish that have approached the center and a net 75 for catching the corpses that flow on the water stream. The recovery hole 72 is arranged in the center of the floor, and a vertically long opening 74 for introducing the medaka carcass 65a is provided on the recovery hole 72.
The guide 73 having the above is provided upright, and the net 75 is stretched between the guide 73 and the peripheral wall of the water tank 66 so as to receive the dead body 65a toward the flow of the raw water.
This net 75 does not block or disturb the flow of raw water. In addition, a hook plate 76a for hooking a dead body 65a flowing near the water surface is also provided above the net 75.
A hooking plate 76b for catching a carcass flowing along the bottom surface is arranged in the lower part of the above, and also serves to hold the net 75 up and down. In the figure, reference numeral 77 is an outlet for discharging raw water to the outside, and 78 is an overflow outlet for returning the raw water to the upstream room.

Next, the operation of this embodiment will be described. First, the water tank 66 of the present embodiment has a substantially elliptical shape, and since the raw water is discharged along the peripheral wall, it flows so as to swirl around the center of the bottom surface of the water tank. Further, since the water tank 66 has an elliptical shape as described above, in the detection block for detecting fish, the block portions cut off at the four corners of the water tank are not required to be detected and all others are set to be detectable. Next, in the water tank 66, the raw water discharged by the submersible pump 70 is caused to flow along the curved walls of the four corners in a swirling state so as not to be disturbed, so that the raw water flows in the same state everywhere in the water tank 66. As a result, the medaka fish 65 are in a state of being scattered around the aquarium and swimming. Further, the dead killed medaka catches on the net 75 or the hooking plates 76a and 76b after one round at the longest, and becomes stationary, so that it can be immediately distinguished from the living killed medaka.
The medaka caught on the hook plates 76a and 76b may be collected in the collecting hole 72 after being guided to the guide 73 side by the hook plates. Also, the aquarium unit 6
0 can be used under the same conditions throughout the year. That is, when the raw water introduced such as in winter is at a low temperature such that the medaka is in a hibernation state, the temperature of the raw water is adjusted to an appropriate temperature by the electric heater 69 provided in the second chamber 62, and then the raw water is discharged to the water tank 66. As described above, in the detection device of the present embodiment, the movement of the medaka 65 is activated throughout the year, and when the medaka dies, it is fixed by a net or the like to further improve the detection accuracy. is there. Further, even if a dead body is generated, the water supply / drainage port and the overflow port are not blocked by the dead body, and the state in the water tank can be always maintained in a normal state. The reason for returning the raw water from the water tank 66 to the third chamber 63 via the overflow port 78 is that the low temperature raw water does not reach an appropriate temperature instantly even if it is heated by the electric heater 69, so that the heat energy is reused as much as possible. Is.

Next, a third embodiment shown in FIGS. 6A and 6B will be described. In the description of the present embodiment, when there are the same parts as those in the first and second embodiments, the same reference numerals are given and the specific description thereof is omitted. FIG. 6A is an explanatory view showing the front of the device in which the set of devices of the present embodiment is housed in a portable cabinet, and FIG. 6B is an explanatory view showing the same side. The water quality detection device using fish according to the present embodiment is characterized in that a set of the automatic detection circuit unit 3, the monitor TV 4, the aquarium unit 60, the switchable filter device 80, etc. is housed in a vertical portable cabinet 81. . The automatic detection circuit unit 3 has a two-stage configuration including a control unit 82 and an image processing device 83, and the control unit 82 is provided with an informing means 84 for gradually changing the lighting position according to the number of surviving killifish. . A pH indicator 85 measures and displays the pH concentration of the raw water by a pH sensor 86 provided in the third chamber. In addition, 90 is a delight switch, 91 is a temperature controller that controls the heater 69, 92 is a power switch, 93 is a water leak drain pad, 94 is a water leak sensor provided on the pad, and 95 is a door switch that monitors opening and closing of the door. Is. The details will be described below.

First, the present apparatus is equipped with an automatic feeder 87, which is adapted to feed medaka on a regular basis. 88
Is a ventilation fan, and the steam generated by heating the raw water with the electric heater 69 by the detection device feeds the feeding device 87.
It is designed to prevent condensation on the surface. This is because the bait for medaka is in powder form and the supply port gets wet and the powder is easily fixed. In addition, 89 is an illuminator that illuminates the inside of the aquarium from a horizontally long window. By illuminating the inside of the aquarium 66 from the side, the reflection on the surface of the water that is mistaken for a medaka is eliminated, and the appearance of the medaka in the water is clear. It helps to bring it up. Further, the present apparatus is provided with an aeration device 96 as an air supply device in the second chamber 63. As described above, in this device, the oxygen concentration in the raw water is improved, the feeding device 87 is used to feed the food regularly, and the water temperature is adjusted to improve the living environment of the medaka fish to be inhabited so as not to give stress. , The system is always operated without any problems and stable water quality inspection can be performed for a long period of time.

FIG. 7 is a block diagram showing the detection device housed in the cabinet of this embodiment. Basically, all the devices can be monitored in the cabinet 81. When using and monitoring in an office away from the installation location of this device, it is possible to monitor and analyze by sending and receiving by wireless or communication line. The image processing device 83 includes a video distributor 83a that distributes an image signal from the surveillance camera 13 to four circuits and an image processing circuit 8.
3b and a time setting unit 83c. Also,
The control unit 82 has a notification means 84 on the front panel.
Is equipped with. Next, a means for giving a stepwise notification of the degree of danger of raw water will be described. 64 sensor dots of 8x8 are set in one of the detection blocks arranged in the entire aquarium, and each of the sensor dots has a sensor function of detecting with a brightness signal, so that the medaka swims. The sensor dots are set to detect when touched, and the number of alarms is specified for each detection block. Medakas smaller than one of the sensor blocks are placed in the water tank in the range of 10 to 20 fishes, and the monitoring video is branched into four by the video distributor 83a and input to the image processing circuit 83b.
The image processing circuit 83b has four circuits so as to detect the number of alarms in the sensor block by taking charge of one of four different stages. The control unit 82 receives the signal from the image processing circuit 83b,
The notification means 84 displays the information in stages. In the present embodiment, when there is a slight decrease in medaka, the warning light 84b is turned on, the danger light 84e is turned on in total erasure, and the intermediate part is divided into two stages to turn on the warning light 84c and the warning light 84d. The normal lamp 84a is turned on when there is no alarm. However, even if the decrease in medaka fish is detected by the video signal from the surveillance camera 13, the medaka fish may actually be in a temporarily stationary state. Therefore, the image processing device 83 uses the time setting circuit 83c for 10 to 60 seconds, for example. It is provided so that the time can be set and determined. The control unit 82 also has a pH (and temperature) indicator 85. A personal computer 48 is connected to the control unit 82 to store data. Further, based on this data, the data of the history analysis 48e, the notifying means 84 and the pH and temperature indicator 48d is displayed on the monitor screen of the personal computer 48b.

FIG. 8 shows a concrete display of the monitor screen 98 of the personal computer, which is a five-step display section of normal 99a, caution 99b, warning 99c, caution 99d, danger 99e for notifying the state of water quality (degree of danger). The display unit 100 includes a buzzer on / off display for notifying the degree by a sound, a current state content display unit 101 in the water quality state display, and a water tank leakage presence / absence display unit 102. Further, FIG. 9 shows a history / analysis screen in which the content display section 101 is clicked by the click section 103 to instruct. The water quality detection device using fish of the present embodiment is configured as described above, and the cabinet 81 allows the set of devices to be easily carried to the site and installed. Therefore, simply connect the water supply / drainage pipe and power source at the water source requiring a toxicity test, for example, the water source for water supply, adjust the water temperature to the temperature preferred by the medaka, and supply the bait preferred by the medaka with the automatic feeder 87 as appropriate. Therefore, the effect that the water source can be accurately detected over a long period of time can be obtained. In addition, by using national standards or internationally standardized cabinets, space can be saved by synchronizing with peripheral devices.

Although the embodiment of the present invention has been described above, the specific configuration of the present invention is not limited to this embodiment, and there are design changes and the like within the scope not departing from the gist of the invention. Are also included in the present invention. Although the monitoring camera 13 has been described as an interchangeable lens, a zoom lens may be used to support water tank exchange. The detection block 40 is the aquarium 12
Although three rows are provided on the raw water inlet 16 side, the number can be arbitrarily set such as one or two rows. In addition, this inlet 16
Although the detection block is arranged on the side, the detection block may be provided on the side of the drainage port 17 so as to detect fish that have weakened and flowed to this side. Alternatively, the detection blocks may be arranged in appropriate rows on both the inlet side and the drain side, and the determination may be made from the count numbers of both. When the raw water is made to flow vertically through the water tank, a plurality of the raw water inlets may be provided side by side so that the fish spread in the plane direction, so that the fish can be prevented from being easily duplicated in one detection block. The number of dots, the number of blocks, the number of fish, etc. for detection can be set appropriately. When it is detected that there is an abnormality in the raw water 6 due to a change in the luminance signal, the video signal of the surveillance camera can be recorded, or the printer can record the date and time. Further, the alarm and image can be transmitted to a remote place through a telephone line.

[Brief description of drawings]

FIG. 1 is a system configuration diagram showing a water quality detection device using fish according to a first embodiment of the present invention.

FIG. 2 is a block circuit diagram showing an automatic detection circuit according to the first embodiment.

FIG. 3 is an explanatory diagram showing a state in which the display area according to the first embodiment is divided into blocks.

FIG. 4 is a plan view showing a water tank unit according to a second embodiment.

5 is a cross-sectional view taken along the line CC of FIG.

6A and 6B show an apparatus according to a third embodiment, where FIG. 6A is an explanatory view showing the front of the apparatus in which the complete apparatus is housed in a portable cabinet, and FIG. 6B is an explanatory view showing the same side.

FIG. 7 is a block diagram showing an apparatus according to a third embodiment.

FIG. 8 is a diagram of a monitor screen showing an informing means for displaying the degree of danger of water quality in stages according to the third embodiment.

FIG. 9 is a diagram of a monitor screen showing history / analysis contents according to the third embodiment.

[Explanation of symbols]

2 sensor unit 3 Automatic detection circuit unit 4 monitor TV 6 Raw water 10 Medaka (fish) 12 aquarium 13 surveillance cameras 16 Raw water inlet 17 Raw water outlet 21 Sloped floor of aquarium 30 color burst removal circuit 31 Clamp circuit 32 input sync separation circuit 33 A / D conversion circuit 34 Detection processing circuit 35 RAM 36 Microcomputer 37 detection dots 39-block outer frame 40 detection blocks 41 Blocks that do not require detection 44 Superimpose circuit 45 Operation switch 46 Sequencer 48 personal computers 66 water tank 69 Electric heater 70 Submersible Pump 72 Recovery hole for corpses 73 guide (guide of dead body) 75 Net (guide material for carcass) 76a Guide plate near the surface of the water (guide for dead bodies) 80 filter device 81 cabinet 84 Five-level danger level notification means 87 Automatic feeder 88 ventilation fan 96 Aeration device (air supply device)

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kei Yamamoto             20-105 Hodaidai, Jonan-ku, Fukuoka (72) Inventor Takahiro Yamamoto             4-36-8 Kamo, Sawara-ku, Fukuoka (72) Inventor Yuichi Kawamoto             5-11-7 Tenjin, Koga City, Fukuoka Prefecture

Claims (20)

[Claims] 1. A healthy living behavior pattern in which the raw water taken is continuously passed through a water tank, the fish inhabiting the water tank are constantly monitored by a surveillance camera, and the fish being monitored is preset in an automatic detection circuit. In the water quality detection device, which is adapted to detect that the raw water is not suitable for water use, the monitoring camera photographs the fish through the water surface from the upper opening of the aquarium. A water quality detection device using fish, which is characterized in that it is arranged as follows. 2. The fish is a fish having a positive flowability, and the automatic detection circuit monitors the number of fish within the monitoring range set in the aquarium on the monitor screen and the number of monitoring fluctuates. An alarm signal is output at the time of claim 1.
A water quality detecting device using the fish described in 1. 3. The fish according to claim 2, wherein the automatic detection circuit outputs an alarm signal when the number of fish monitored decreases within a monitoring range set on the upstream side of the aquarium. Water quality detector. 4. The number of fishes monitored by the upstream detection unit, wherein the automatic detection circuit comprises a detection unit for monitoring the monitoring range set on the upstream side of the aquarium and a detection unit for monitoring the monitoring range set on the downstream side. 3. The water quality detecting device using fish according to claim 2, wherein an alarm signal is output when the number of fishes decreases or the number of fishes monitored in the downstream detection unit increases. 5. The water quality detecting device using fish according to claim 1, wherein the water tank is formed by curving four corners. 6. The water quality detecting device using fish according to claim 5, wherein the fish tank is provided with a hooking member for the carcass that prevents the carcass of the fish from moving in the water flow. 7. The water quality using fish according to claim 1, wherein the water tank is provided with a filter device for filtering raw water before water supply to the water tank. Detection device. 8. The water quality detection device using fish according to claim 1, wherein the water tank is provided with an air supply device into the water. 9. The water quality detecting device using fish according to claim 1, wherein the water tank is provided with a heater for adjusting water temperature. 10. The water quality detecting device using fish according to claim 1, wherein the aquarium is provided with an automatic feeding device. 11. The water tank has a plurality of raw water inlets arranged side by side.
A water quality detecting device using the fish according to any one of 0. 12. The floor surface of the water tank is inclined downward from the raw water inlet to the raw water outlet, and the floor is inclined downward. Water quality detection device using fish. 13. The surveillance camera is provided with a zoom lens or an interchangeable lens, and when the size of the aquarium is selected according to the size or / and the number of habitats of the fish suitable for detecting the raw water, The fish according to any one of claims 1 to 12, wherein the positions of the water tank and the surveillance camera are always kept at a constant position by adjusting the zoom lens or changing the lens. Water quality detector. 14. The automatic detection circuit divides the luminance signal of one screen imaged by the surveillance camera into a large number of dots to which horizontal and vertical addresses are added to form a detectable dot, and a large number of these are arranged vertically and horizontally. Blocks are stored together and the blocks within the monitoring range of the same screen and the screen after an arbitrary time has elapsed are compared, and an alarm signal is output when the level of change in this brightness signal is outside the preset range. A water quality detecting device using the fish according to any one of claims 1 to 13. 15. The automatic detection circuit inputs a color burst removal circuit for removing a color signal from a video signal of the surveillance camera and an output signal of the color burst removal circuit to output a luminance signal with a constant voltage. A clamp circuit, an input sync separation circuit that separates the output signal of the clamp circuit into a horizontal synchronization signal and a vertical synchronization signal, an A / D conversion circuit that converts the output signal of the clamp circuit into a digital signal, and the horizontal synchronization A detection processing circuit that generates horizontal and vertical addresses based on a signal and a vertical synchronization signal and sets horizontal and vertical detection dots in a digital output signal of one screen of the A / D conversion circuit, and each detection dot as an address. The number and arrangement of all detected dots assigned and stored in memory, and changes in the brightness signal preset for each detected dot or block A microcomputer for outputting an alarm signal to the detection processing circuit when the change of the luminance signal of the screen currently being output is out of the range with respect to the level of
The water quality detection device using fish according to claim 14, characterized in that it is provided. 16. The microcomputer is connected with an external operation switch for setting the level of change of the luminance signal in a detection dot or block in one screen, and between the microcomputer and the video signal output circuit. The water quality detection device using fish according to claim 15, wherein a superimpose circuit is connected. 17. The water quality using fish according to claim 16, wherein the microcomputer is connected to a personal computer or / and a sequencer for selectively providing a detection function to the dots or blocks. Detection device. 18. The water quality using fish according to claim 14, wherein the block is sized so as to surround the height of one fish. Detection device. 19. The water quality detection device using fish according to claim 18, wherein the automatic detection circuit is provided with an informing unit for informing the degree of risk stepwise according to the number of living fish. . 20. The set of the water tank, the surveillance camera, the automatic detection circuit, the filter device, the air supply device, the heater, the automatic feeding device and the monitor device is housed in a portable cabinet. Water quality detection device using fish.