JPS6159260A - Water quality examination apparatus - Google Patents
Water quality examination apparatusInfo
- Publication number
- JPS6159260A JPS6159260A JP18065984A JP18065984A JPS6159260A JP S6159260 A JPS6159260 A JP S6159260A JP 18065984 A JP18065984 A JP 18065984A JP 18065984 A JP18065984 A JP 18065984A JP S6159260 A JPS6159260 A JP S6159260A
- Authority
- JP
- Japan
- Prior art keywords
- water
- aquarium
- fish
- water quality
- storage means
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/18—Water
- G01N33/186—Water using one or more living organisms, e.g. a fish
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の技術分野〕
この発ｆ！Ａは、上水道用の水の水質検旌等に好適な水
質検査装置に関するものである。[Detailed description of the invention] [Technical field of the invention] This invention f! A relates to a water quality testing device suitable for testing the quality of water for water supply.
上水道用の水には毒性が無いことが絶対的な条件である
から、水質検査が不可欠である。従来の斯種水質検査と
しては、上水道の通水管から分岐した管よシ得た水に川
魚や金魚などを入れてこれを飼育し、その死や異常反応
を監視員が目視観察する手法が採られていた。しかしな
がら、このような監視員による目視観察は、監視員の疲
労を招くので他の手法として、魚の呼吸や心拍を利用す
るものが提案されている。しかし、このような呼吸や心
拍のデータは、微弱な信号の変化を他の雑音成分から識
別して得るため、上記手法は実現が困難でるる。Water quality testing is essential, as it is an absolute prerequisite that water for public drinking be non-toxic. Conventional water quality testing of this type involves raising river fish, goldfish, etc. in water obtained from a pipe branching off from a water supply pipe, and then visually observing the fish for death or abnormal reactions. It was getting worse. However, such visual observation by lifeguards causes fatigue on the lifeguards, so other methods have been proposed that utilize the fish's breathing and heartbeat. However, such respiration and heartbeat data is obtained by distinguishing weak signal changes from other noise components, making the above method difficult to implement.
また、向流性を有する魚のその能力低下を観察する手法
も提案されているが、特殊な魚に限定されるので実現が
困難であ）、また監視員によるときには、従来と同様の
欠点がある。In addition, a method has been proposed to observe the decline in the ability of fish that have countercurrent properties, but it is difficult to implement because it is limited to special fish), and when it is done by observers, it has the same drawbacks as conventional methods. .
更に、上記の呼吸や心拍による手法や魚の向流性による
手法のいずれでも、環境の変化等によって反応が変化す
ることがあシ、魚の個々によっても反応が異なることが
あるので、必ずしも毒性と関係ある反応を求めることが
できに＜＜、誤検出となることがめる。Furthermore, both of the above-mentioned methods based on respiration and heartbeat, and methods based on the countercurrent flow of fish, the reactions may change due to changes in the environment, and the reactions may differ depending on the individual fish, so there is no guarantee that there will be a correlation with toxicity. If a certain reaction cannot be determined, false positives may occur.
本発明はこのような従来の水質検査の手法が有する欠点
に鑑みなされたもので、その目的は、自動的忙早く検査
が可能であるとともに、精度の良い検査を行なうことの
できる水質検査装置を提供することである。The present invention was developed in view of the shortcomings of conventional water quality testing methods, and its purpose is to provide a water quality testing device that is capable of automatic, quick testing and highly accurate testing. It is to provide.
そこで本発明では、飼育される魚が入れられた水槽の水
の略表面を照射するように配設された照明装置と、上記
水の表面を撮像する撮像装置と、との撮像装置！！によ
って得られる映像信号の明度の高い信号によって形成さ
れるノターンに基づいて上記水槽の水の水質を検査する
検査部とを具備するように水質検査装置を構成し、画像
処理により水面における魚の動作から水質を検査するよ
うにし、上記目的を達成したものである。Therefore, in the present invention, an imaging device includes an illumination device arranged to illuminate substantially the surface of water in an aquarium in which fish to be kept are placed, and an imaging device that images the surface of the water! ! The water quality testing device is configured to include a testing section that tests the water quality of the water in the aquarium based on a notarn formed by a high-brightness video signal obtained by The above purpose was achieved by testing the water quality.
以下図面を参照して本発明の一実施例を説明する。 An embodiment of the present invention will be described below with reference to the drawings.
第１ｒＩ！Ｊは本発明の実施例のブロック図である・同
図において、１は水槽を示す。この水槽１には図示せぬ
導管から上水道用の水が分岐して導かれ、常に上水道用
の水と水質が一致させられている。1st rI! J is a block diagram of an embodiment of the present invention. In the figure, 1 indicates a water tank. Water for municipal water supply is branched and led to this water tank 1 from a conduit (not shown), and the quality of the water is always made to match that of water for municipal water supply.
また、水槽１は、その側面、底面等から光が入射せぬよ
うに、必要に応じて遮光される。水槽ｌには、体長１０
０ｎ〜１５ａｎの生魚２が飼育される。この生魚２はコ
イやフナ、または金魚などが用いられる。Further, the aquarium 1 is shaded as necessary to prevent light from entering from its side surfaces, bottom surface, etc. Aquarium l has a body length of 10
Raw fish 2 of 0n to 15an are raised. As the raw fish 2, carp, crucian carp, goldfish, or the like is used.
３は照明装置である螢光灯を示す。この螢光灯３は、そ
の光が水槽１の水の略表面を照射するように配設され、
水の表面部分の高反射体のみがある明度をもち、水中等
の部分は、フントラスト比が圧縮されたｖ！、像が得ら
れるようになされている。3 indicates a fluorescent lamp which is an illumination device. This fluorescent lamp 3 is arranged so that its light illuminates substantially the surface of the water in the aquarium 1,
Only the highly reflective material on the surface of the water has a certain brightness, and the parts in the water have a compressed hill-to-last ratio v! , so that an image can be obtained.
また、螢光灯３の光が水面を十分広範囲に均一に照射可
能なように、螢光灯３にはツーＰや反射板が付設され、
後述するテレビカメラに直接光が入射しないようにして
いる。ここで、水に毒物等が混入し、水質に異常をきた
した場合、魚は、１、時々暴れ回る。In addition, in order to uniformly irradiate the water surface with the light of the fluorescent lamp 3 over a sufficiently wide range, the fluorescent lamp 3 is equipped with a two-P and a reflector.
This prevents direct light from entering the television camera, which will be described later. Here, when poisonous substances etc. are mixed into the water and the water quality becomes abnormal, the fish sometimes become violent.
２、腹を横にして数秒〜数十秒漂い、再び正常姿勢に戻
って回遊するという動作を繰返す。2. They float on their bellies for a few seconds to tens of seconds, then return to their normal posture and move around again, repeating this process.
３、腹を横にして浮いたままとなる。また、酸欠の場合
には、鼻上げ状態となる。3. Stay floating with your belly on your side. In addition, in the case of oxygen deficiency, the nose becomes raised.
このように、魚は時開とともにその反応を変化させ、つ
いに死に至る。この場合、魚の行動を映像で捕えると、
１、暴れ回る魚は、水面に波を発生させ広がった明点な
与える。暴れを停止すると、明点は自然減衰し消滅する
。In this way, fish change their reactions over time and eventually die. In this case, if you capture the fish's behavior on video: 1. The rampaging fish creates waves on the water surface and gives off a bright spot that spreads out. When the rampage stops, the bright spot naturally attenuates and disappears.
λ 魚の腹は種類にかかわらず高反射率を示し明点とな
るが、正常姿勢の時は暗部となる。Regardless of the species, the belly of a λ fish exhibits high reflectance and forms a bright spot, but when it is in its normal position, it becomes a dark area.
３、鼻上げ状態では、魚の口や頭、背ぎしの一部が水面
で凸部をなし、明点となる。3. When the fish's nose is up, the fish's mouth, head, and part of its back form a convex part on the water surface, which becomes a bright spot.
以上の水面での変化のみを捕え、水中での魚の行動に左
右されない映像を得るため、螢光灯３の光の照射角度が
上述の如く決められている。In order to capture only the above-mentioned changes on the water surface and obtain an image that is not affected by the behavior of the fish in the water, the irradiation angle of the light from the fluorescent lamp 3 is determined as described above.
４＃−ｉ水面を撮像する撮像ｖｃ誼であるテレビカメラ
を示す。このテレビカメラ４は、水槽１の水の表面のみ
を撮像する画角を持つように、水槽１の上方に配設され
る。4#-i This shows a television camera that is an imaging device that images the water surface. This television camera 4 is arranged above the aquarium 1 so as to have an angle of view that images only the surface of the water in the aquarium 1.
５は、検査部を示す。この検査部５ｔｊ：、テレビカメ
ラ４から得られる映像信号を受は取シ、映像信号の明度
の高い信号によって形成されるパターンに基づいて水（
１１の水の水質を検査するものである。5 indicates an inspection section. This inspection section 5tj: receives the video signal obtained from the television camera 4, and detects the water (
This test tests the water quality of 11 waters.
検査部５は、例えば、第２図の如く構成される。The inspection section 5 is configured as shown in FIG. 2, for example.
同図において、１１はテレビカメラ４かも映像信号を受
は取る入力端子を示す。入力端子１１を経て２値化回路
１２へ到った映像信号は、ここで２値画信号とされてノ
イズ除去回路１３へ送られる。ノイズ除去回路１３では
、水面に浮遊していた♂ミや泡等の微小浮遊物による小
明点が除去される。In the figure, reference numeral 11 indicates an input terminal for receiving and taking video signals from the television camera 4. The video signal that has reached the binarization circuit 12 via the input terminal 11 is converted into a binary image signal and sent to the noise removal circuit 13. The noise removal circuit 13 removes small bright spots caused by minute floating objects such as male fish and bubbles floating on the water surface.
ノイズ除去回路１３から出力された２値画信号は、演算
回路と記憶回路とを１組とした３岨Ｑ演算記憶手段に取
シ込まれる。演算回路１４は２値画信号から、魚２の腹
の大きさ、その形状に相当する「白」信号（明点）のパ
ターンの位置のデータを求め、このデータを記憶回路１
７へ送る。また、演算回路１５は２値画信号から、魚２
の腹の大きさより大きいパターンの位置のデータを求め
、このデータを記憶回路１８へ送る。更に、演算回路１
６は２値画信号から、魚２の腹の大きさより小さいパタ
ーンの数又はその総面積（明点数Ｘ画素の面積）のデー
タを求め、このデータを記憶回路１９へ送出する。記憶
回路１７〜１９では、送出されたデータの記憶がなされ
る。ここで、記憶回路１７〜１９は、データの記憶を例
えば、１〜２秒毎に、次々に行なうものとする。２０は
記憶回路１７〜１９を含む処理回路を示す、処理回路加
には、予め、水質によって魚が行動するときに得られる
パターンから、その数や総面積のデータが類型化されて
与えられている。また、処理回路加内には図示せぬ比較
手段があり、この比較手段は、例えば、四秒毎に、記憶
回路１７〜１９に記憶されたデータと予め与えられ丁い
るデータとを比較し、毒性のある物質が混入したか、あ
るいは、酸欠の状態にあるか等を検出する。The binary image signal outputted from the noise removal circuit 13 is taken into a 3-Q calculation storage means which includes a calculation circuit and a storage circuit. The arithmetic circuit 14 obtains data on the position of a "white" signal (bright spot) pattern corresponding to the size and shape of the belly of the fish 2 from the binary image signal, and stores this data in the storage circuit 1.
Send to 7. Further, the arithmetic circuit 15 calculates the fish 2 from the binary image signal.
The data at the position of the pattern larger than the antinode size is obtained and this data is sent to the storage circuit 18. Furthermore, the arithmetic circuit 1
6 obtains data on the number of patterns smaller than the belly size of the fish 2 or their total area (number of bright spots x area of pixels) from the binary image signal, and sends this data to the storage circuit 19. The storage circuits 17 to 19 store the sent data. Here, it is assumed that the storage circuits 17 to 19 sequentially store data, for example, every 1 to 2 seconds. Reference numeral 20 indicates a processing circuit including memory circuits 17 to 19. Data on the number and total area of fish is categorized and given in advance to the processing circuit based on patterns obtained when fish behave depending on water quality. There is. Further, there is a comparison means (not shown) in the processing circuit, and this comparison means compares the data stored in the memory circuits 17 to 19 with the data given in advance, every four seconds, for example. It detects whether toxic substances have been mixed in or there is a lack of oxygen.
例えば、毒物が混入した場合、既述３項の事象のように
魚２は腹を横にして浮いた状態となるので、腹の大きさ
罠相当する「白」信号のパターンが、画面の一部または
全体を覆い、この状態が所定（Ｔｘ ）秒以上絖〈こと
になる、この場合、魚２の数から上記パターンの数がＮ
ｔ個以上あること（（Ｎｚ以上の魚２が死んだこと）を
条件として毒物の混入を検知することとする。このよう
に、Ｔｘ。For example, if a poisonous substance is mixed in, Fish 2 will float with its belly on its side, as in the event described in Section 3 above, so the "white" signal pattern corresponding to the size of the belly will be displayed on the screen. In this case, the number of the above patterns is N from the number of fish 2.
Contamination with poisonous substances is detected on the condition that there are t or more fish ((Nz or more fish 2 are dead). In this way, Tx.
Ｎ、を適当に選択すること罠よって、毒物混入の検出感
度を与えることができる。従って、上記比較手段は、予
め与えられたＴｘ ＝ ＮＸ Ｋ基づいて、記憶回路１
７に記憶されているデータを参照し、腹の大きさく相当
する「白」信号のパターンの位置がＴ、秒経過しても大
きく変化せず、かつ、とのパターンの数がＮ１以上であ
れば、毒物混入を示す信号を出力する。By appropriately selecting N, the detection sensitivity for poisonous contamination can be provided. Therefore, the comparison means compares the storage circuit 1 based on the predetermined Tx = NX K.
Referring to the data stored in 7, if the position of the "white" signal pattern corresponding to the size of the antinode does not change significantly after T seconds have elapsed, and the number of patterns is N1 or more, For example, it outputs a signal indicating poisonous substance contamination.
また、毒物が混入して初期の段階か、その量が少ないと
き等には、既述２項の事象のような魚２の異常反応が生
じる。このときは、魚２の暴れＫよシ、水面に波が発生
し、広がった明点が現われ、暴れの停止によシ明点が自
然減衰し、消滅する。Furthermore, when the poisonous substance is in the initial stage or when the amount thereof is small, an abnormal reaction of the fish 2 as described in the above-mentioned item 2 occurs. At this time, as the fish 2 moves wildly, waves are generated on the water surface and a widening bright spot appears, and when the rampage stops, the bright spot naturally attenuates and disappears.
そこで、画面内には、魚２の腹よシ大きな明点が８１１
個存在し、各々は所定時間ｔ。、静止後消滅する状況が
所定時間ＴＩ！にＭｕ回以上繰返される。このため、比
較手段は、予め与えられたｔｌ、、Ｉ’ｌＨｇ ＴＩＸ
ｅ Ｎｂｘｅに基づいて、記憶回路１８に記憶されて
いるデータを参照し、腹の大きさよりも大きい「白」信
号の・ぐターンのｉ数が８１１以上あり、各々がｔｘｘ
時間静止後消滅し、この状況がＴ１１時間内に油！回以
上繰返されたとき、毒物の混入の予見を示す信号を出力
する。Therefore, on the screen there is a bright spot 811 larger than the belly of fish 2.
each exists for a predetermined time t. , the situation that disappears after being stationary for a predetermined time TI! is repeated Mu times or more. For this reason, the comparison means uses the previously given tl, , I'lHg TIX
e Nbxe, referring to the data stored in the memory circuit 18, there are 811 or more i-turns of the "white" signal that are larger than the antinode size, and each one is txx
It disappears after time stops, and this situation is oil within T11 time! When repeated more than once, a signal is output indicating that poisonous substances have been detected.
更に１酸欠状態となると、魚２が鼻上げ状態となるから
、画面内に比較的小さい明点が多数存在し、所定時間Ｔ
ｓｖ以上これが続くことになる。従って、上記比較手段
は、予め与えられたＴ、に基づいて、記憶回路１９に記
憶されているデータを参照し、腹の大金さよりも小さな
「白」信号のパターンの数が所定数以上あるか、又は明
点の総面積が所定値以上あシ、この状態がＴ、以上続く
ときには、酸欠である旨を示す信号を出力する。Furthermore, when the state of 1 oxygen deficiency occurs, the fish 2 becomes in a state where its nose is raised, so there are many relatively small bright spots within the screen, and the predetermined time T
This will continue for more than sv. Therefore, the comparison means refers to the data stored in the storage circuit 19 based on the predetermined value T, and determines that the number of patterns of "white" signals smaller than the large amount of money is equal to or greater than a predetermined number. Or, if the total area of bright spots exceeds a predetermined value and this condition continues for T or more, a signal indicating oxygen deficiency is output.
以上のようにして比較手段から出力嘔れる信号は、処理
回路２０に接続される書報出力回路２１へ与えられる。The signal output from the comparison means as described above is applied to the report output circuit 21 connected to the processing circuit 20.
１１報出力回路２１は処理回路加から出力される信号の
内容に応じて異なった書報音を発生させる。The 11 report output circuit 21 generates different report sounds depending on the content of the signal output from the processing circuit.
このように本実施例では、３組の演算記憶手段を使用し
て、水質を的確に検査することができるものである。In this way, in this embodiment, water quality can be accurately tested using three sets of calculation storage means.
尚、演算回路１４〜１６と処理回路２０とは、所謂コン
ビエータによシ構成し、ソフトウェアによって実現して
も良い。また、演算記憶手段の数は、本実施例のより第
３ｍでなくとも、２組以下または４組以上でも検査する
水質の指標の種類によって変えることができる。更に、
魚２が金魚であるときには、赤系の影響を除去するため
、テレビカメラ２の前面に赤系除去の光学フィルタを配
設する。Note that the arithmetic circuits 14 to 16 and the processing circuit 20 may be configured as a so-called combinator and realized by software. Further, the number of arithmetic storage means does not have to be the third meter according to the present embodiment, but can be changed to 2 or less or 4 or more depending on the type of water quality index to be tested. Furthermore,
When the fish 2 is a goldfish, an optical filter for removing the red color is disposed in front of the television camera 2 in order to remove the influence of the red color.
以上説明したように本発明によれば、背景の影響を受け
ずに魚の反応を明度の高い信号から形成されるパターン
として捕えることができ、自動的に１早＜、シかも、精
度の良い水質検査を行なうことができる。しかも、複数
の魚の行動を統計的に処理し、水質の判定を自動化させ
ているので、監視員が監視する巻合のような個人差を除
去でき、この点でも精度の向上が大きいものである。As explained above, according to the present invention, it is possible to capture fish reactions as a pattern formed from signals with high brightness without being influenced by the background, and it is possible to automatically detect fish reactions with high accuracy in water quality. Tests can be carried out. Furthermore, since the behavior of multiple fish is statistically processed and the judgment of water quality is automated, individual differences such as the number of fish that are monitored by lifeguards can be eliminated, and accuracy is greatly improved in this respect as well. .
第１図は本発明の一実施例のブロック図、第２図は第１
図の要部の詳細ブロック図である。
１・・・水槽 ２・・・魚 ３・・・螢光灯４・・・テ
レビカメラ ５・・・検査部１２・・・２値化回路 １
３・・・ノイズ除去回路１４〜１６・・・演算回路 １
７〜１９・・・記憶回路２０・・・処理回路FIG. 1 is a block diagram of one embodiment of the present invention, and FIG. 2 is a block diagram of an embodiment of the present invention.
FIG. 3 is a detailed block diagram of the main part of the figure. 1...Aquarium 2...Fish 3...Fluorescent light 4...TV camera 5...Inspection section 12...Binarization circuit 1
3... Noise removal circuit 14-16... Arithmetic circuit 1
7-19...Storage circuit 20...Processing circuit
Claims (3)
射するように配設された照明装置と、前記水の表面を撮
像する撮像装置と、該撮像装置から得られる映像信号の
明度の高い信号によって形成されるパターンに基づいて
前記水槽の水の水質を検査する検査部とを具備する水質
検査装置。(1) An illumination device arranged to illuminate substantially the surface of water in an aquarium containing fish to be kept, an imaging device that takes an image of the surface of the water, and a video signal obtained from the imaging device. A water quality testing device comprising: an testing section that tests the water quality of the water in the aquarium based on a pattern formed by signals with high brightness.
該２値化回路の出力中の「白」信号によって形成される
パターンから所定時間毎に所定の大きさのパターンの位
置、数又は総面積を求めて記憶する演算記憶手段と、該
演算記憶手段に記憶されているデータと予め記憶されて
いる水質異常を示すデータとを比較する比較手段とを具
備することを特徴とする特許請求の範囲第（１）項記載
の水質検査装置。(2) The inspection unit includes a binarization circuit that binarizes the video signal;
an arithmetic storage means for determining and storing the position, number, or total area of patterns of a predetermined size at predetermined time intervals from the pattern formed by the "white" signal output from the binarization circuit; and the arithmetic storage means. The water quality testing device according to claim 1, further comprising comparison means for comparing the data stored in the water quality testing device with pre-stored data indicating a water quality abnormality.
号によって形成されるパターンから所定時間毎に魚の腹
の大きさ及び形状に対応するパターンの位置を求めて記
憶する第１の演算記憶手段と、前記２値化回路の出力中
の「白」信号によって形成されるパターンから所定時間
毎に魚の腹の大きさより大のパターンの位置を求めて記
憶する第２の演算記憶手段と、前記２値化回路の出力中
の「白」信号によって形成されるパターンから所定時間
毎に魚の腹の大きさより小のパターンの数を求めて記憶
する第３の演算記憶手段とを具備することを特徴とする
特許請求の範囲第（２）項記載の水質検査装置。(3) The first arithmetic storage means calculates and stores the position of the pattern corresponding to the size and shape of the fish's belly at predetermined time intervals from the pattern formed by the "white" signal output from the binarization circuit. and a second calculation storage means for determining and storing the position of a pattern larger than the belly of a fish at predetermined time intervals from the pattern formed by the "white" signal output from the binarization circuit. and third arithmetic storage means for determining and storing the number of patterns smaller than the belly of the fish at predetermined time intervals from the patterns formed by the "white" signal output from the binarization circuit. A water quality testing device according to claim (2), characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18065984A JPS6159260A (en) | 1984-08-31 | 1984-08-31 | Water quality examination apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18065984A JPS6159260A (en) | 1984-08-31 | 1984-08-31 | Water quality examination apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6159260A true JPS6159260A (en) | 1986-03-26 |
Family
ID=16087067
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18065984A Pending JPS6159260A (en) | 1984-08-31 | 1984-08-31 | Water quality examination apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6159260A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63179252A (en) * | 1987-01-21 | 1988-07-23 | Hitachi Ltd | Detector of poison produced by aquatic animal |
| JPS6429763A (en) * | 1987-07-27 | 1989-01-31 | Hitachi Ltd | Method and device for monitoring water quality containing knowledge processing |
| JPH05324954A (en) * | 1991-11-28 | 1993-12-10 | Nec Corp | Device for counting the number of parked cars |
| JP2002264227A (en) * | 2001-03-08 | 2002-09-18 | Duplo Seiko Corp | Paper feed sealing device and mailing machine using the same |
| CN108510481A (en) * | 2018-03-22 | 2018-09-07 | 杨明 | Sewage disposal system based on image procossing and method |
| CN111257528A (en) * | 2020-02-11 | 2020-06-09 | 北京知天地环境科技有限公司 | Automatic detection and early warning device for water quality comprehensive toxicity |
-
1984
- 1984-08-31 JP JP18065984A patent/JPS6159260A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63179252A (en) * | 1987-01-21 | 1988-07-23 | Hitachi Ltd | Detector of poison produced by aquatic animal |
| JPS6429763A (en) * | 1987-07-27 | 1989-01-31 | Hitachi Ltd | Method and device for monitoring water quality containing knowledge processing |
| JPH05324954A (en) * | 1991-11-28 | 1993-12-10 | Nec Corp | Device for counting the number of parked cars |
| JP2002264227A (en) * | 2001-03-08 | 2002-09-18 | Duplo Seiko Corp | Paper feed sealing device and mailing machine using the same |
| CN108510481A (en) * | 2018-03-22 | 2018-09-07 | 杨明 | Sewage disposal system based on image procossing and method |
| CN111257528A (en) * | 2020-02-11 | 2020-06-09 | 北京知天地环境科技有限公司 | Automatic detection and early warning device for water quality comprehensive toxicity |
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