JP2018012544A - Sewage water amount measurement system - Google Patents

Sewage water amount measurement system Download PDF

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JP2018012544A
JP2018012544A JP2016144969A JP2016144969A JP2018012544A JP 2018012544 A JP2018012544 A JP 2018012544A JP 2016144969 A JP2016144969 A JP 2016144969A JP 2016144969 A JP2016144969 A JP 2016144969A JP 2018012544 A JP2018012544 A JP 2018012544A
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sewage
scale
manhole
belt
pipe
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JP6806357B2 (en
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健司 長谷川
Kenji Hasegawa
健司 長谷川
達昭 飯島
Tatsuaki Iijima
達昭 飯島
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Kansei Co
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Kansei Co
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Abstract

PROBLEM TO BE SOLVED: To provide a cheap sewage water amount measurement system which can be used for various forms of manholes.SOLUTION: A belt-like scale 15 is fitted along a tip inner face of an upstream side sewer pipe 13 connected to a manhole 11, a submerged state of the scale 15 is photographed and recorded at a prescribed time interval by an infrared night vision camera 7 located at the manhole 11. The scale 15 is configured from a stainless belt-like body 19 which is slender and thin, and a scale tape 23 bonded to a surface of the belt-like body 19. Graduations which represent a length are given onto the scale tape 23.SELECTED DRAWING: Figure 3

Description

本発明はマンホールを利用してこのマンホールに接続されている下水管路を流れる下水の流量を計測する下水量計測システムに関する。   The present invention relates to a sewage measurement system that measures the flow rate of sewage flowing through a sewage pipe connected to the manhole using a manhole.

分流式下水道では、雨水と汚水を同一の合流管で処理するのではなく、雨水を河川等に放流する雨水管渠と汚水を処理する汚水管渠を構築して雨水と汚水を別々に処理している。したがって、汚水管渠系は基本的には汚水のみを処理できるように設計されているので、例えば損傷している汚水ますから雨水が汚水管内に流入すると、汚水管内の流量が増加し、マンホール蓋から下水が溢れ出したり、下水処理場の負荷を増大させたりし、場合によっては処理能力を超えた下水が下水処理場に流れ込んで処理場が機能不全になるといった事態も生じ得る。   In the sewer system, instead of treating rainwater and sewage with the same combined pipe, rainwater and sewage are treated separately by constructing a stormwater culvert that discharges rainwater to rivers, etc. and a sewage tractor that treats sewage. Yes. Therefore, the sewage pipe system is basically designed so that only sewage can be treated. For example, if rainwater flows into the sewage pipe, the flow rate in the sewage pipe increases and the manhole cover increases. The sewage may overflow from the sewage treatment plant, or the load of the sewage treatment plant may be increased. In some cases, the sewage that exceeds the treatment capacity may flow into the sewage treatment plant, resulting in malfunction of the treatment plant.

したがって、雨水等の不明水の流入の有無を確認し、流入がある場合には流入個所を特定して必要な補修等を行うこととなるが、雨水等の流入の有無及びその程度の把握は例えば特許文献１に記載されたような流量計をマンホールのインバートに設置して行われている。   Therefore, the presence or absence of inflow of unknown water such as rainwater will be confirmed, and if there is inflow, the inflow location will be identified and necessary repairs will be performed. For example, a flow meter as described in Patent Document 1 is installed in an invert of a manhole.

登録実用新案第３０６１７１５号公報Registered Utility Model No. 3061715

特許文献１に記載されたようなフリューム式流量計を用いる場合には超音波水位センサによって水位を計測することにより流量を算出しているが、フリューム式流量計は価格が高く、しかも流量計測個所の管径に合った寸法のフリュームを大量に所持しておく必要があるため、機材の管理が困難である。したがって、不明水調査のように多くの調査個所での流量調査が必要になる場合には、少数の流量計を順番に調査個所に設置しながら流量調査を行うので調査期間が長くなってしまう。しかもフリューム式流量計は下水の流れに平行に設置する必要があるので、インバートで流れの方向を変化させているようなマンホールへの適用は難しい。   When a flume type flow meter as described in Patent Document 1 is used, the flow rate is calculated by measuring the water level with an ultrasonic water level sensor. However, the flume type flow meter is expensive and the flow rate is measured. Because it is necessary to have a large amount of flume that matches the pipe diameter, it is difficult to manage the equipment. Therefore, when it is necessary to conduct a flow rate survey at many survey points, such as an unknown water survey, the flow rate survey is performed while a small number of flow meters are installed in the survey site in order, so the survey period becomes longer. Moreover, since the flume type flow meter needs to be installed in parallel to the sewage flow, it is difficult to apply it to a manhole in which the flow direction is changed by inversion.

そこで本発明は、種々の形態のマンホールに利用可能で、しかも安価な下水量計測システムの提供を目的とする。   SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an inexpensive sewage measurement system that can be used for various types of manholes.

この目的を達成するための本発明の下水量計測システムは、下水管渠の下水流量を計測する下水量計測システムであって、下水管路とマンホールとの接続部内又はマンホールのインバートに形成されている流路内に設けられたスケールと、前記マンホール内に配置され、前記スケールが設けられた個所を連続的に又は所定時間間隔で撮影する撮影装置と、を備えたものである。下水管路とマンホールとの接続部内は例えば断面円形に形成され、インバートの流路は例えば断面円形又は断面Ｕ字形に形成される。スケールは例えば下水流に水没している部分の長さを下水流の上側から確認できるものであり、下水流の水位を直接読み取ることができるもの又は下水流の水位を算出できるものとすることができる。撮影装置は例えば水没しているスケール部分を撮影する。   A sewage amount measuring system of the present invention for achieving this object is a sewage amount measuring system for measuring a sewage flow rate of a sewage pipe, and is formed in a connecting portion between a sewage pipe and a manhole or inverting a manhole. A scale provided in the flow path, and a photographing device that is arranged in the manhole and photographs a portion where the scale is provided continuously or at predetermined time intervals. The inside of the connecting portion between the sewer pipe and the manhole is formed, for example, in a circular cross section, and the invert channel is formed, for example, in a circular cross section or a U-shaped cross section. For example, the scale can confirm the length of the portion submerged in the sewage flow from the upper side of the sewage flow, and can directly read the water level of the sewage flow or calculate the water level of the sewage flow. it can. The photographing device photographs, for example, a scale portion that is submerged.

スケールは下水管路とマンホールとの接続部内面又は流路内面の周方向の長さを示すものとすることができる。このようなスケールを用いれば下水流量を算出するための潤辺と水位をスケールで確認できる。スケールは流入側の下水管路とマンホールとの接続部内に設けるのが好ましい。   The scale may indicate the length in the circumferential direction of the inner surface of the connecting portion or the inner surface of the flow path between the sewer pipe and the manhole. If such a scale is used, the wetness and water level for calculating the sewage flow rate can be confirmed on the scale. The scale is preferably provided in a connection portion between the sewage pipe on the inflow side and the manhole.

スケールは長さを示す目盛が設けられたバネ弾性を有する、例えばステンレス等の金属製の帯状体又は長尺体を備えることができる。このようなスケールは、例えば、帯状体が接続部内面又は流路内面に沿って周方向に延びるように湾曲して取り付けられることにより設けられる。   The scale can include a belt-like body or a long body made of metal such as stainless steel having spring elasticity provided with a scale indicating the length. Such a scale is provided by, for example, being attached so that the belt-like body extends in the circumferential direction along the inner surface of the connection portion or the inner surface of the flow path.

帯状体の長さ方向中央部には帯状体と直角の方向に延びるサポート体を設けておくことが好ましい。ここではこのサポート体が下水管内面、具体的には下水管内面底部又は流路底部と接触してスケールの取り付け安定性が増加する。サポート体はスケールのいずれか一方側又は両側に設けることができる。   It is preferable to provide a support body extending in a direction perpendicular to the belt-like body at the center in the longitudinal direction of the belt-like body. Here, the support body comes into contact with the inner surface of the sewage pipe, specifically, the bottom surface of the sewage pipe or the bottom of the flow path, thereby increasing the mounting stability of the scale. The support body can be provided on either one side or both sides of the scale.

撮影装置は赤外線暗視カメラであることが効果的である。これにより２４時間にわたってスケールの目盛、例えば水没しているスケールの目盛を正確に確認できる画像又は映像を確保できる。   It is effective that the photographing apparatus is an infrared night vision camera. As a result, it is possible to secure an image or video that can accurately confirm the scale of the scale over 24 hours, for example, the scale of the scale submerged.

本発明の下水量計測システムは十分な汎用性を有し、下水管渠への雨天時浸入水等の不明水の流入量を低コストで把握するのに役立つ。   The sewage amount measuring system of the present invention has sufficient versatility and is useful for grasping the inflow amount of unknown water such as rainwater intrusion into the sewer pipe at low cost.

不明水の調査把握から対策に至るまでの処理手順を説明する図である。It is a figure explaining the processing procedure from investigation grasp of unknown water to measures. ポンプ施設のマンホール内に設置した下水量調査装置を示す図である。It is a figure which shows the amount-of-sewage investigation apparatus installed in the manhole of pump facilities. 本発明に係る下水量調査システムを示す図である。It is a figure which shows the sewage amount investigation system which concerns on this invention. スケールを示す斜視図である。It is a perspective view which shows a scale. スケールを示す分解斜視図である。It is a disassembled perspective view which shows a scale. サポート体を両側に設けた場合を示す図である。It is a figure which shows the case where a support body is provided in both sides. ターンバックルを用いたスケールを示す図である。It is a figure which shows the scale using a turnbuckle. 赤外線暗視カメラの撮影画像を示す図である。It is a figure which shows the picked-up image of an infrared night vision camera. 水位の求め方を説明する図である。It is a figure explaining how to obtain the water level. 雨天日の各撮影時間での下水流量を示し、降雨量が併記されているグラフである。It is a graph showing the sewage flow rate at each shooting time on a rainy day, and the rainfall amount. 晴天日の各撮影時間での下水流量を示すグラフである。It is a graph which shows the sewage flow rate in each imaging time on a clear day. 別の晴天日の各撮影時間での下水流量を示すグラフある。It is a graph which shows the sewage flow rate in each shooting time on another sunny day. 雨天時浸入水の流量を示すグラフである。It is a graph which shows the flow volume of infiltration water at the time of rain.

まず、図１を参照して不明水の調査把握から対策に至るまでの処理手順を概略的に説明する。ここでは、雨天時浸入水だけでなく常時浸入水（地下水や海水など）も不明水として調査及び対策の対象としている。   First, with reference to FIG. 1, the process procedure from the investigation grasp of unknown water to a countermeasure will be schematically described. Here, not only inundation water in rainy weather but also regular infiltration water (groundwater, seawater, etc.) is subject to investigation and countermeasures as unknown water.

不明水の調査にあたっては最初に過去の下水管渠の維持管理履歴を調査（予備調査）して数百ヘクタールの調査実施個所（特定の大ブロック）を選定する（Ｓ１）。次に、雨天時や晴天時の下水流量を計測して不明水量を調査し、調査対象の２０乃至３０ヘクタール程度の中ブロックを絞り込み（Ｓ２）、さらに雨天時や晴天時の下水流量を計測して不明水量を調査し、モデル地区としての２乃至５ヘクタール程度の小ブロックを絞り込む（Ｓ３）。特にＳ２で行われる不明水量の調査は概略的なものであってもよく、例えば図２に示すようにポンプ施設のマンホール１内に高さスケール３を立てておき、ステップ５に取り付けたデジタルカメラ６で撮影したマンホール１内の画像又は映像から時間の経過にともなう下水量の増加態様を分析し、雨天時の流量増加を把握するといった手法を含めてもよい。また、Ｓ３で行われる不明水の調査には図３に示す本発明に係る下水量計測システムを主として用いることができる。小ブロックを絞り込んだら、下水管内を走行するテレビカメラ車などを用いて損傷個所等を確認し、損傷個所等の程度に基づき補修優先順位を求めて補修個所を算出する（Ｓ４）。補修個所が算出されたら補修工事を実施し（Ｓ５）、Ｓ３と同一の個所で下水量の調査を再度実施して改善効果を確認する（Ｓ６）。これらの調査結果及び改善効果は下水管の維持管理データとして蓄積され（Ｓ７）、例えば同じような状況の下水管渠での補修個所の算出に利用される（Ｓ８）。   In the investigation of unknown water, first, the past management history of sewage pipes is investigated (preliminary survey), and several hundred hectares of survey locations (specific large blocks) are selected (S1). Next, measure the sewage flow rate in rainy weather or clear weather to investigate the unknown water volume, narrow down the middle block of about 20 to 30 hectares to be investigated (S2), and further measure the sewage flow rate in rainy weather or sunny weather. The amount of unknown water is investigated, and a small block of about 2 to 5 hectares as a model district is narrowed down (S3). In particular, the survey of the unknown water amount performed in S2 may be schematic. For example, as shown in FIG. 2, a digital camera mounted in step 5 with a height scale 3 standing in the manhole 1 of the pump facility. A method may be included in which the manner in which the amount of sewage increases with the passage of time is analyzed from the image or video in the manhole 1 taken in step 6 to grasp the increase in the flow rate during rainy weather. Moreover, the sewage amount measuring system according to the present invention shown in FIG. 3 can be mainly used for the investigation of unknown water performed in S3. Once the small blocks are narrowed down, the damaged portion or the like is confirmed using a TV camera car or the like traveling in the sewer pipe, and the repair priority is calculated based on the degree of the damaged portion or the like (S4). When the repair location is calculated, repair work is performed (S5), and the amount of sewage is checked again at the same location as S3 to confirm the improvement effect (S6). These survey results and improvement effects are accumulated as sewage pipe maintenance management data (S7), and are used for, for example, calculation of repair points in a sewage pipe dredger in the same situation (S8).

次に、図３、図４及び図５を参照して本発明に係る下水量調査システム９の構成を説明する。   Next, the configuration of the sewage amount survey system 9 according to the present invention will be described with reference to FIG. 3, FIG. 4 and FIG.

下水量調査システム９では、マンホール１１に接続されている下水管のうちの上流側の下水管１３の先端部内面あるいはマンホール１１の流入口部内面に帯状のスケール１５を沿うように取り付け、マンホール１１に掛け渡してある取り付けバー１７に固定した赤外線暗視カメラ７でこのスケール１５の水没状態を所定の時間間隔（例えば２分間隔）で撮影して記録する。ここで、下水管のうちの下流側の下水管１４が別の方向に延びている場合でも下水量調査システム９を使用して下水流量を計測することができる。なお、図３に示されているスケール１５部分の拡大図は赤外線暗視カメラ７側から見た図としている。また、インバート底面１８が水没するほどの下水量の増加がないことが確実な場合には赤外線暗視カメラ７をインバート底面１８に設置しておいてもよい（仮想線参照）。   In the sewage amount survey system 9, the upstream side of the sewage pipes connected to the manhole 11 is attached along the belt-like scale 15 to the inner surface of the upstream end of the sewage pipe 13 or the inner surface of the inlet of the manhole 11. The submerged state of the scale 15 is photographed and recorded at a predetermined time interval (for example, every 2 minutes) with the infrared night vision camera 7 fixed to the mounting bar 17 that is stretched over the space. Here, even when the downstream sewage pipe 14 of the sewage pipes extends in another direction, the sewage flow rate can be measured using the sewage amount investigation system 9. In addition, the enlarged view of the scale 15 shown in FIG. 3 is a view seen from the infrared night vision camera 7 side. In addition, when it is certain that there is no increase in the amount of sewage so that the invert bottom surface 18 is submerged, the infrared night vision camera 7 may be installed on the invert bottom surface 18 (see the virtual line).

図４及び図５に示すように、スケール１５は、細く薄いステンレス製の帯状体１９と、帯状体１９から直角方向に延びるように帯状体１９の表面に先端部が固定された、細く薄いステンレス製のサポート体２１と、サポート体２１の先端部を含んで帯状体１９の表面に貼り付けられた目盛テープ２３と、を備え、目盛テープ２３の目盛はスケール１５（帯状体１９）の長さを示すようにふられている。目盛テープ２３は黒地に白色で目盛値表示及び目盛を示したものであり、０目盛がスケール１５（帯状体１９）の長さ方向中央部、すなわちサポート体２１の先端部個所に位置し、帯状体１９の長さ方向両端に向かって目盛が増えていくように帯状体１９に貼り付けられている。目盛テープ２３は一枚構成のものとすることができるが、図５に示すように、対称に形成された２枚のテープ片から構成してもよい。このような構成のスケール１５は、サポート体２１が下水管１３の管底に位置するようにして帯状体１９を円形状に湾曲した状態で下水管１３の先端部内面に嵌め付けることにより取り付けられる。湾曲した帯状体１９はバネ弾性復帰力により下水管１３の先端部内面に押し付けられているのでスケール１５の目盛は下水管１３の先端部内面の周方向の長さを示すものとなっている。なお、帯状体１９は直線状ではなく、若干湾曲するように形成されていてもよい。サポート体２１の先端部の後側では帯状体１９の厚さ分だけの段差部２５が形成され、サポート体２１の先端部よりも後側の裏面は帯状体１９の裏面と共面状態となっている。なお、図６に示すようにサポート体２１を０目盛位置で両側に延びるように設けてもよい。また、図７に示すようにＣ字形に変形させた帯状体１９の両端部間にターンバックル２７を取り付けておき、ターンバックル２７の長さ調節により帯状体１９を下水管１３の先端部内面に押し付けるように構成してもよい。ここでは取り付け安定性を確保するためのサポート体２１は設けられていない。   As shown in FIGS. 4 and 5, the scale 15 includes a thin thin stainless steel strip 19 and a thin thin stainless steel whose tip is fixed to the surface of the strip 19 so as to extend in a direction perpendicular to the strip 19. And a scale tape 23 that is attached to the surface of the band-like body 19 including the tip of the support body 21, and the scale of the scale tape 23 is the length of the scale 15 (band-like body 19). Is touched to show. The scale tape 23 is white and has a scale value display and scale on a black background. The 0 scale is located at the center in the length direction of the scale 15 (band-like body 19), that is, at the tip portion of the support body 21, and is strip-like. It sticks to the strip | belt-shaped body 19 so that a scale may increase toward the length direction both ends of the body 19. FIG. The scale tape 23 can be composed of one sheet, but as shown in FIG. 5, it may be composed of two tape pieces formed symmetrically. The scale 15 having such a configuration is attached by fitting the belt-like body 19 on the inner surface of the distal end portion of the sewer pipe 13 in a state where the support body 21 is positioned on the bottom of the sewer pipe 13 and is curved in a circular shape. . Since the curved belt-like body 19 is pressed against the inner surface of the distal end portion of the sewer pipe 13 by the spring elastic restoring force, the scale of the scale 15 indicates the circumferential length of the inner surface of the distal end portion of the sewer pipe 13. In addition, the strip | belt-shaped body 19 may not be linear, but may be formed so that it may curve a little. A stepped portion 25 corresponding to the thickness of the band-shaped body 19 is formed on the rear side of the front end portion of the support body 21, and the back surface behind the front-end portion of the support body 21 is coplanar with the back surface of the band-shaped body 19. ing. In addition, as shown in FIG. 6, you may provide the support body 21 so that it may extend on both sides in a 0 scale position. Further, as shown in FIG. 7, turnbuckles 27 are attached between both ends of the belt-like body 19 deformed in a C shape, and the belt-like body 19 is attached to the inner surface of the distal end portion of the sewer pipe 13 by adjusting the length of the turnbuckle 27. You may comprise so that it may press. Here, the support body 21 for securing the mounting stability is not provided.

赤外線暗視カメラ７により図８に示すような画像が記録されるので、この画像によりスケール１５（帯状体１９）の下水Ａに水没している長さＬはここでは一方側の１５ｃｍの目盛から他方側の１５ｃｍの目盛までの３０ｃｍであることあるいは一方側の１５ｃｍの目盛の２倍の３０ｃｍであることが確認できる。スケール１５の水没長さＬが確認できると、水没長さＬの中心角をＢとして水位ｈはｒ×（１−ｃｏｓ（Ｂ÷２））で導かれる（図９参照）。したがって、潤辺Ｌと水位ｈが求まるのでマニングの公式を用いて下水流量を算出できる。   Since an image as shown in FIG. 8 is recorded by the infrared night vision camera 7, the length L submerged in the sewage A of the scale 15 (band-like body 19) from this image is a scale of 15 cm on one side here. It can be confirmed that the distance is 30 cm up to the 15 cm scale on the other side or 30 cm, which is twice the 15 cm scale on the one side. When the submerged length L of the scale 15 can be confirmed, the water level h is derived by r × (1−cos (B ÷ 2)) where B is the central angle of the submerged length L (see FIG. 9). Therefore, since the wet side L and the water level h are obtained, the sewage flow rate can be calculated using the Manning formula.

図１０乃至図１３を参照して下水量調査システム９による調査成果を説明する。   The investigation result by the sewage amount investigation system 9 will be described with reference to FIGS. 10 to 13.

赤外線暗視カメラ７の記録から調査日ごとに各撮影時間での下水流量を算出してグラフ化したものが図１０乃至図１３に示されている。図１０は雨天日の下水流量を示し、降雨量が併記されている。図１１は晴天日の下水流量を示すグラフであり、図１２は別の晴天日の下水流量を示すグラフである。また、図１３は図１０の調査日における雨天時浸入水量を示すグラフである。図１３の各撮影時間での雨天時浸入水量（不明水）Ｗ１は、各撮影時間での図１０に示す下水流量Ｗ２から各撮影時間での晴天日時間平均下水流量Ｗ３を差し引いた値である。晴天日時間平均下水流量Ｗ３は、図１１の晴天日の下水流量と図１２の晴天日の下水流量との平均を撮影時間ごとに求めた値である（実際にはさらに別の晴天日の下水流量も用いて平均が算出されている）。なお、Ｗ４は降雨量であり、また常時浸入水（不明水）は晴天日の深夜から未明にかけて記録された最少下水量とすることができる。   FIGS. 10 to 13 show graphs obtained by calculating the sewage flow rate at each photographing time from the record of the infrared night vision camera 7 for each survey date. FIG. 10 shows the sewage flow rate on rainy days, and the rainfall amount is also shown. FIG. 11 is a graph showing the sewage flow rate on a clear day, and FIG. 12 is a graph showing the sewage flow rate on another clear day. Moreover, FIG. 13 is a graph which shows the amount of infiltration water at the time of rain on the investigation day of FIG. 13 is a value obtained by subtracting the average daytime sewage flow rate W3 on each shooting time from the sewage flow rate W2 shown in FIG. 10 at each shooting time. . The sunny day time average sewage flow rate W3 is a value obtained by obtaining the average of the sewage flow rate on the sunny day in FIG. 11 and the sewage flow rate on the sunny day in FIG. The average is also calculated using the flow rate). In addition, W4 is the amount of rainfall, and always inundated water (unknown water) can be the minimum amount of sewage recorded from midnight to early morning on a fine day.

７ 赤外線暗視カメラ
９ 下水量調査システム
１１ マンホール
１３ 上流側の下水管
１５ スケール 7 Infrared night vision camera 9 Sewage amount survey system 11 Manhole 13 Sewage pipe 15 on the upstream side Scale

Claims (6)

下水管渠の下水流量を計測する下水量計測システムであって、
下水管路とマンホールとの接続部内又はマンホールのインバートに形成されている流路内に設けられたスケールと、
前記マンホール内に配置され、前記スケールが設けられた個所を連続的に又は所定時間間隔で撮影する撮影装置と、を備えたことを特徴とする下水量計測システム。 A sewage measurement system for measuring the sewage flow rate of a sewage pipe,
A scale provided in the flow path formed in the inversion of the manhole or in the connection between the sewer pipe and the manhole,
A sewage amount measurement system comprising: a photographing device that is disposed in the manhole and photographs a portion where the scale is provided continuously or at predetermined time intervals. 前記スケールは前記下水管路と前記マンホールとの前記接続部内面又は前記流路内面の周方向の長さを示している、ことを特徴とする下水量計測システム。   The scale indicates a circumferential length of the inner surface of the connecting portion or the inner surface of the flow path between the sewage pipe and the manhole. 前記スケールは前記下水管路と前記マンホールとの流入側の前記接続部内に設けられている、ことを特徴とする請求項１又は２記載の下水量計測システム。   The sewage amount measuring system according to claim 1 or 2, wherein the scale is provided in the connecting portion on the inflow side between the sewage pipe and the manhole. 前記スケールは長さを示す目盛が設けられたバネ弾性を有する帯状体を備え、この帯状体が前記下水管路と前記マンホールとの前記接続部内面又は前記流路内面に沿って周方向に延びるように湾曲して取り付けられることにより設けられている、ことを特徴とする請求項１、２又は３記載の下水量計測システム。   The scale includes a belt-like body having a spring elasticity provided with a scale indicating a length, and the belt-like body extends in the circumferential direction along the inner surface of the connecting portion or the inner surface of the flow path between the sewer pipe and the manhole. 4. The sewage amount measuring system according to claim 1, wherein the sewage amount measuring system is provided by being curved and attached. 前記帯状体の長さ方向中央部にはこの帯状体と直角の方向に延びるサポート体が設けられている、ことを特徴とする請求項１、２、３又は４記載の下水量計測システム。   The sewage amount measurement system according to claim 1, 2, 3, or 4, wherein a support body extending in a direction perpendicular to the belt-like body is provided at a central portion in the longitudinal direction of the belt-like body. 前記撮影装置は赤外線暗視カメラである、ことを特徴とする請求項１、２、３、４又は５記載の下水量計測システム。   6. The sewage amount measuring system according to claim 1, wherein the photographing device is an infrared night vision camera.
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