JPS61224690A - Detector of poison of raw water - Google Patents

Abstract

PURPOSE:To monitor the action of fish in a water tank with naked eyes and to satisfy conditions for photographing by shielding light other than the prescribed light outside, constituting the water tank not so as to change the state of the surface of the water and shielding the prescribed light at the time of photographing. CONSTITUTION:The water tank 1 is of a box shape with its top opened. Three side walls 1a, 1b and 1c are made of a material which will not transmit light, or a paint which will not transmit light is applied to said walls in order to minimize the outside optical influence, and a remainder side wall 1d is formed with a glass material so that a person can monitor fish with naked eyes. A deflecting filter 2 is installed on the side wall 1d made of glass. A lighting device 9 lighting only around the water surface L in order to photograph only around it is installed on the top of the water tank 1, and an upper cover 10 shielding the top of the water tank 1 is installed on the top of the lighting device 9. A television camera 11 is loaded on the top of the upper cover 10 and is provided with a deflecting filter 10, where the deflecting filter 2 installed on the side wall 1d intersects orthogonally with the deflection surface, on the front of a lens 12.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a detection device for detecting the presence or absence of toxicity in raw water such as waterworks.

[Technical background of the invention and its problems]

Conventionally, the method used to assess the toxicity of raw water, such as water supplies, was to ingest fish in an aquarium and have a lifeguard visually observe the fish for death or abnormal reactions. However, in recent years, visual inspection by such observers requires continuous detection due to rotation and the distance is large, so there has been a strong demand for a method that allows quick detection without relying on observers.

Therefore, a method has been proposed that uses the fish's breathing and heartbeat, but this method has the problem that it is difficult to separate changes in weak signals from other noise components. Another method is to put the fish in an aquarium containing raw water,
The response of the jiao in this aquarium is photographed using a television camera or an imaging device with the same effect. A device has been developed to detect this.

However, if you try to use an aquarium that uses a device (2) as a monitoring aquarium using the conventional visual inspection (12) described above, light from the outside (2) may cause the water surface to shine or the bottom of the aquarium to be
9, it becomes difficult to distinguish between fish that are behaving normally in the aquarium and fish that are acting abnormally and coming out close to the water surface, or it may cause abnormal erroneous detection. Therefore, in order to solve this problem, it is necessary to install a dedicated aquarium that does not allow light to enter from the outside, separate from the conventional visual inspection (2) aquarium to be monitored, and make effective use of existing equipment. There were other problems, such as the need for large-sized equipment, and difficulty in maintaining and filling the tank.(Secondly, in conventional aquariums, bubbles formed near the reservoir where four people were to handle the raw water, and near the drain where the water was drained.) Bubbles and ripples were generated, and these bubbles and ripples were often mistakenly detected as fish that had experienced an abnormal phenomenon due to m't*y.

In addition, in order to raise fish, it is necessary to feed them, but with conventional feeding methods, the fed food itself floats on the surface of the water. A fish that woke up and surfaced and was mistakenly detected as a right fish.
This has the drawback that the swarming fish C2 may cause ripples on the water surface, or the heads of the fish may be exposed to the surface of the water, resulting in false detection as an abnormal phenomenon.

On the other hand, judging from past results, the frequency of contamination of raw water (= poisonous substances) is extremely low, and the number of times an alarm is issued due to contamination with the four substances is less than 11 times per year. If the '4 bulb is disconnected, no image will appear at all, but even if the video signal with no image is processed by the outside image Ji4m and turned into a turn, this pattern will remain normal. During this time, if a poisonous substance leaks, it will not be detected.In other words, the number of detections by the detection device is very small compared to other devices and Itc.
=, Detection device failure 6; Sometimes the original function is not performed without realizing it.

[Purpose of the invention]

The present invention has been made in response to the above-mentioned circumstances, and an object of the present invention is to provide a raw water substance detection device that eliminates false detections, automatically detects failures, and has high M4 reliability.

[Summary of the invention]

The present invention is a raw water poison detection device that raises fish in an aquarium into which raw water is introduced, photographs the fish's behavior near the water surface, processes the images, and detects poisons mixed into the raw water. (Secondly, the aquarium is constructed so as not to change the condition of the water surface, and the aquarium is constructed so that the specified light is blocked from the outside.) The behavior of the fish inside can be monitored with the naked eye, and photographed (=) without causing any hindrance.

[Examples of hidden inventions]

Hereinafter, an embodiment of the raw water four-object detection device of the present invention will be described with reference to FIG. Figures 1 and 2 (2, water, 4
1 has an open top and has 123 IJs'J, la in order to reduce the influence of external light as much as possible.
, lb, and lc are made of a material that does not transmit light or are coated with a paint that does not transmit light, and one side wall ld is made of a glass material so that monitoring by 11 [(===) is made of a glass material. The material 1dldζ2 is this side fi
Light from the outside enters through ld, and a polarizing filter 2 is provided to prevent this light from illuminating the entire aquarium l and being photographed by a television camera.

In addition, through the introduction #3 that penetrates one 11111 oak 1b and its end is underwater (=), the introduction section 4 of raw water by the 4 entry pipe 3 and the photographing section that takes pictures 5, the upper part of the vomit is above the water surface and is partially submerged;
By providing a drainage f7 that penetrates the drainage pipe 46 that has a waterfall hole and the opposing 51d1m, the drainage pipe 7 penetrates 1.
An outflow groove @8 is provided for each of the two t57a4 to prevent the occurrence of raw water leakage and drainage (double and ripples).

Furthermore, in the upper part of the aquarium 1, there is a lighting device t9 that illuminates only the vicinity of the water surface in order to photograph only the vicinity of the water surface, and an upper cover 10 that blocks light from the upper part of this illumination device 9 (= the upper part of the water 41). tt (J) is provided.The television camera 11 is attached to the upper part of this upper cover 10, and this television camera 211 has a lens 12 in front (211111
d (two polarizing filters 2 are provided, and n polarizing filters 13 whose polarization planes are perpendicular to each other are provided.

The upper cover illumination 2 is provided with a bait injection port 14, and this injection port 14 is provided with a J115 that can be opened and closed freely, and this door 15 is provided with a feed opening 14.
A switch 16 is provided to detect when the switch is opened.

The signal from this switch 16 causes the image processing device t 17 (second speed (1)) to stop the detection operation for a certain period of time after 7415 is opened.

In addition, the video signal taken by the television camera 11 (2) is processed by image processing (2) to turn it into a turn, and from this pattern it is determined whether the raw water (= poisonous substance has been mixed in or not. On the top of the flow Wk6, there is a white disk (diameter about 3cl!L) for failure detection.
8 is provided.

Next (2, the operation of the above configuration will be explained. As mentioned above, the water pail 1 is completely shielded from light except for the side wall 1 d that is viewed from the inner eye (2! I!), and this side wall 1 d (= Since the polarizing filter 2 is also provided, the light from the outside is only directed in a certain direction (two beams).

Also, a polarizing filter 13 is provided at the front of the lens 12 of the television camera 11, and since the plane of polarization of the polarizing filter 13 is in the direction perpendicular to the polarizing filter 2, the television camera 114= External light that has passed through the polarizing filter 2 does not reach the polarizing filter 2.

Therefore, the television camera 711 only uses the illumination device 19.
Photographing only the area near the illuminated water surface (2). Here, abnormal behavior of fish can be detected by photographing the area near the water surface where the fish is lying on its belly (2) with its nose up. Since it is necessary to target underwater activities, it is preferable not to photograph underwater activities.

For this reason, taking pictures only near the water surface using the above-mentioned TV camera lit is a plus for this plant! It directly improves the detection accuracy of the device (it has two effects).

In addition, since the end of the introduction pipe 3 that introduces the raw water into the water bucket 11 is underwater, it is possible to prevent the generation of bubbles and ripples when introducing the raw water, and between the raw water introduction part 4 and the photographing part 5 (: is equipped with a rectifier Ii6, and the upper part of the rectifier Ii6 is equipped with water 1fi L (:
Since it protrudes, even if bubbles are generated at the introduction 54t, they will not flow into the photographing section 5 and no ripples will be generated on the water surface. Therefore, there are no bubbles or ripples on the water surface (:Therefore, there is no false detection.
Since the outflow weir 8 is provided across the entire length of J4dla, the drainage direction (two flows uniformly (two flows and the water surface L (two ripples do not occur). Therefore, there is no false detection due to ripples on the water surface. .

In addition, a switch 16 is provided on the door 15 of the feed inlet 14 provided on the upper cover 10 of the aquarium 1, and the signal from this switch 16 sends a two-speed signal to the image processing device 17. The detection operation of the image processing is stopped for a certain period of time after the transmission, so when copper is given, the fish may rise to the surface of the water (= erroneously detect that the fish has floated), or the fish may rise to the surface to eat the copper. This prevents false detections of fish with their noses up and improves detection accuracy.

As mentioned above, the frequency of water contamination with raw water (24 substances) is extremely low, about once per year (= once a year), so it is unlikely that a failure of the detection device itself, such as a break in the illumination device 9, will occur. The conventional problem is that the white marker a18 installed on the top of the Hime-ryu wall 6 is always displayed in the image taken from the TV power meter 642, so the image processing device 17 calculates the position ( If there are two signals, it is determined that the device is normal, and if this signal disappears (= it is determined that there is a failure and an alarm is issued) 1: This improves the reliability of the detection device.

〔Effect of the invention〕

Since the present invention is configured as described above, it is not affected by external light, does not generate bubbles or ripples, and when administering feed, the image processing device 1: The detection operation is stopped to eliminate false detections, and the failure of the detection device itself can be confirmed from #2 (2), so reliability can be increased by a large G+2.

[Brief explanation of drawings]

Figure WI1 is a sectional view showing an embodiment of the raw water inspection device of the present invention, Figure fJ2 is a cross-sectional view taken along the line A-A in Figure 1 and viewed in the direction of the arrow (2nd view, Figure 3 is It is a perspective view showing supporting parts of one example of the present invention. 1...Aquarium, 2...Polarizing filter 3...
・Water pipe, 4...Hime flow wall 5...Raw water,
7... Drain pipe 8... Outflow weir, 9...
Illumination device 10...Top cover, 11...TV camera 13...Polarizing filter, 17...Image processing device (8733) Agent: Yoshiaki Inomata, patent attorney
and 1 other person) Figure 1 Figure 2 L t8 Figure 3

Claims (1)

[Claims] In a raw water poison detection device that rears fish in an aquarium into which raw water is introduced, photographs the behavior of the fish near the water surface, processes this video, and detects toxic substances mixed in the raw water, the aquarium is Only the viewing surface is transparent, and the surface of the pond is a light-shielding surface.A light-shielding cover is provided above the tank to cover the top of the tank, and the camera for photographing the water surface is installed within this cover. A raw water poison detection device is provided with a polarizing filter on the surface, a polarizing filter whose polarization plane is perpendicular to the polarizing filter on the lens of the camera, and an illumination device inside the cover that illuminates only the water surface area. Device.