CA2870189A1 - Improved apparatus and methode for measuring and monitoring the water height level and corresponding volume of overflow water in sewer overflow chamber - Google Patents
Improved apparatus and methode for measuring and monitoring the water height level and corresponding volume of overflow water in sewer overflow chamber Download PDFInfo
- Publication number
- CA2870189A1 CA2870189A1 CA2870189A CA2870189A CA2870189A1 CA 2870189 A1 CA2870189 A1 CA 2870189A1 CA 2870189 A CA2870189 A CA 2870189A CA 2870189 A CA2870189 A CA 2870189A CA 2870189 A1 CA2870189 A1 CA 2870189A1
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- Prior art keywords
- height level
- liquid height
- liquid
- overflow
- water
- 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
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/0007—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm for discrete indicating and measuring
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F7/00—Other installations or implements for operating sewer systems, e.g. for preventing or indicating stoppage; Emptying cesspools
- E03F7/12—Installations enabling inspection personnel to drive along sewer canals
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B3/00—Measuring instruments characterised by the use of mechanical techniques
- G01B3/02—Rulers with scales or marks for direct reading
- G01B3/04—Rulers with scales or marks for direct reading rigid
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
A video apparatus for measuring and monitoring the water height level of overflow water in municipality's sewer overflow chambers. More specifically, a video camera taking multiples pictures during the occurrence of an overflow with a large scaled ruler positioned beside the area of the overflow. Whereas the video information produced by said video apparatus is analyzed to provide the needed additional information to calculate with higher precision the volume of overflow water in sewer overflow chamber for a corresponding measured overflow water height level.
Description
IMPROVED APPARATUS AND METHODE FOR MEASURING AND
MONITORING THE WATER HEIGHT LEVEL AND CORRESPONDING VOLUME
OF OVERFLOW WATER IN SEWER OVERFLOW CHAMBER
FIELD OF THE INVENTION
This invention relates to an apparatus and method for measuring and monitoring more precisely the water level and associated water volume and water flow rate on a sewer overflow chamber.
BACKGROUND OF THE INVENTION
With the recent changes in global weather, aged municipality sewer systems are often stressed beyond designed capacities, causing increases in waste water overflow. Such waste water overflow needs to be monitored in a number of events, volume per event, water flow rate per event, etc. Such a monitoring system must initially measure accurately the height of the water level at the physical point of overflow needed to calculate the corresponding water overflow rate.
Current measuring equipment systems either use hydrostatic pressure sensor or ultrasound liquid level sensor including a combination of both. Both equipment are prone to measurement error, especially in water overflow chamber, characterized by high turbulence, high volume of debris and high risk of surface foam formation.
Current calculations of the water overflow rate corresponding to a measured overflow water level multiply the water level measurement error into higher water overflow rate calculation error. In addition, the complexity of some water overflow chambers contribute to increasing the overall calculated water overflow rate.
Most industrialized countries regulate municipalities to report every sewer water overflow incident. While some regulations call only to report the number of incidents per time period (i.e. per week) independent of the total volume of overflowed sewer water per incident, other regulations call to report the volume of overflowed sewer water per incident. The latter case is known by government authorities to be prone to a wide range of errors, starting from water height equipment measurement error to the corresponding calculated water overflow rate error, making government authorities reluctant to filling regulations that call on municipalities to publish water overflow rate per incident.
Current techniques to reduce the error are known to be expensive in equipment acquisition and installation fees. One technique to reduce the water height equipment measurement error is to combine the hydrostatic water pressure sensor with the ultrasound water level sensor. One technique to reduce the corresponding calculated water overflow rate error is to add a water flow rate equipment in the water overflow channel.
This invention presents an apparatus and a method that contributes to reducing substantially both; the water height measured error as well as its corresponding calculated water overflow rate error with minimum equipment acquisition and installation fees. It is based on the installation of a camera inside the overflow chamber, aimed at the point of overflow, assisted by a ruler mounted beside the point of overflow, where still pictures or video are taken at the time of overflow triggered by the water level measurement equipment. The picture showing; the water level ruler reading, the water level surface condition and the water level slant angle at and nearby the area of overflow, contributes collectively when integrated with current water level measuring equipment (either hydrostatic pressure or ultrasound level equipment, including simple water presence sensor) to reduce the water level measurement error as well as its corresponding calculated water overflow rate error.
PRIOR ART
There is a plurality of pipe sewer inspection camera, mainly used to find and locate pipe flow anomaly and root cause of water leak. The USA owned, Canadian patent application CA 2309018 filled in 2000, entitled, Improved Apparatus for Inspecting Lateral Sewer Pipes, by Michael R. McGrew, describe such typical camera based
MONITORING THE WATER HEIGHT LEVEL AND CORRESPONDING VOLUME
OF OVERFLOW WATER IN SEWER OVERFLOW CHAMBER
FIELD OF THE INVENTION
This invention relates to an apparatus and method for measuring and monitoring more precisely the water level and associated water volume and water flow rate on a sewer overflow chamber.
BACKGROUND OF THE INVENTION
With the recent changes in global weather, aged municipality sewer systems are often stressed beyond designed capacities, causing increases in waste water overflow. Such waste water overflow needs to be monitored in a number of events, volume per event, water flow rate per event, etc. Such a monitoring system must initially measure accurately the height of the water level at the physical point of overflow needed to calculate the corresponding water overflow rate.
Current measuring equipment systems either use hydrostatic pressure sensor or ultrasound liquid level sensor including a combination of both. Both equipment are prone to measurement error, especially in water overflow chamber, characterized by high turbulence, high volume of debris and high risk of surface foam formation.
Current calculations of the water overflow rate corresponding to a measured overflow water level multiply the water level measurement error into higher water overflow rate calculation error. In addition, the complexity of some water overflow chambers contribute to increasing the overall calculated water overflow rate.
Most industrialized countries regulate municipalities to report every sewer water overflow incident. While some regulations call only to report the number of incidents per time period (i.e. per week) independent of the total volume of overflowed sewer water per incident, other regulations call to report the volume of overflowed sewer water per incident. The latter case is known by government authorities to be prone to a wide range of errors, starting from water height equipment measurement error to the corresponding calculated water overflow rate error, making government authorities reluctant to filling regulations that call on municipalities to publish water overflow rate per incident.
Current techniques to reduce the error are known to be expensive in equipment acquisition and installation fees. One technique to reduce the water height equipment measurement error is to combine the hydrostatic water pressure sensor with the ultrasound water level sensor. One technique to reduce the corresponding calculated water overflow rate error is to add a water flow rate equipment in the water overflow channel.
This invention presents an apparatus and a method that contributes to reducing substantially both; the water height measured error as well as its corresponding calculated water overflow rate error with minimum equipment acquisition and installation fees. It is based on the installation of a camera inside the overflow chamber, aimed at the point of overflow, assisted by a ruler mounted beside the point of overflow, where still pictures or video are taken at the time of overflow triggered by the water level measurement equipment. The picture showing; the water level ruler reading, the water level surface condition and the water level slant angle at and nearby the area of overflow, contributes collectively when integrated with current water level measuring equipment (either hydrostatic pressure or ultrasound level equipment, including simple water presence sensor) to reduce the water level measurement error as well as its corresponding calculated water overflow rate error.
PRIOR ART
There is a plurality of pipe sewer inspection camera, mainly used to find and locate pipe flow anomaly and root cause of water leak. The USA owned, Canadian patent application CA 2309018 filled in 2000, entitled, Improved Apparatus for Inspecting Lateral Sewer Pipes, by Michael R. McGrew, describe such typical camera based
2 application with emphasis on its motion characteristic within the sewer piping system.
The more recent Canadian owned and patent application CA 2798446 filled in 2011, entitled, Method of Inspecting and Preparing a Pipeline, based on the assistance of a camera also restrict its application to sewer pipe.
Advanced patent search could not produce any prior art filled patent nor patent application based on this invention.
Therefore, the main advantages of this invention are: improvement of sewer water overflow height measurement accuracy at the point of overflow, improvement of the corresponding calculated sewer overflow rate accuracy needed to calculate the overall volume of sewer water overflow per incident, at a minimum equipment acquisition and installation cost.
SUMMARY OF THE INVENTION
The present invention presents an apparatus and a method of improving the accuracy of measuring the sewer water height level of overflow and corresponding calculated overflow rate and corresponding total volume of overflow sewer water per overflow incident without substantially increasing the number and cost of additional measuring equipment such as flow meter equipment which required high maintenance level.
Thus, in accordance with one aspect of the invention, a wireless digital camera is positioned inside the overflow chamber such that the field of view of the camera lens is aimed at the point of overflow, where a scaled ruler is mounted to be also in the field of view capturing in the picture the water sewer height level.
As an added benefit, the picture is used to define the sewer water surface conditions when the presence of debris, foams, waves and turbulence is known to be the cause of error in measuring the sewer water height level with electronic equipment such as hydrostatic pressure or ultrasound sensor, whereas ultrasound sensor is known to be more problematic under difficult sewer water surface conditions.
The more recent Canadian owned and patent application CA 2798446 filled in 2011, entitled, Method of Inspecting and Preparing a Pipeline, based on the assistance of a camera also restrict its application to sewer pipe.
Advanced patent search could not produce any prior art filled patent nor patent application based on this invention.
Therefore, the main advantages of this invention are: improvement of sewer water overflow height measurement accuracy at the point of overflow, improvement of the corresponding calculated sewer overflow rate accuracy needed to calculate the overall volume of sewer water overflow per incident, at a minimum equipment acquisition and installation cost.
SUMMARY OF THE INVENTION
The present invention presents an apparatus and a method of improving the accuracy of measuring the sewer water height level of overflow and corresponding calculated overflow rate and corresponding total volume of overflow sewer water per overflow incident without substantially increasing the number and cost of additional measuring equipment such as flow meter equipment which required high maintenance level.
Thus, in accordance with one aspect of the invention, a wireless digital camera is positioned inside the overflow chamber such that the field of view of the camera lens is aimed at the point of overflow, where a scaled ruler is mounted to be also in the field of view capturing in the picture the water sewer height level.
As an added benefit, the picture is used to define the sewer water surface conditions when the presence of debris, foams, waves and turbulence is known to be the cause of error in measuring the sewer water height level with electronic equipment such as hydrostatic pressure or ultrasound sensor, whereas ultrasound sensor is known to be more problematic under difficult sewer water surface conditions.
3 When the sewer height level measurement equipment is already equipped with communication means to relay the measured data to a backend or Internet portal system, the wireless camera uses the existing equipment communication means to relay its pictures to the same backend or Internet portal system.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will now be described in more detail, by way of example only, with reference to the accompanying drawings, in which:
Figure 1 is a block diagram and data flow diagram of the overall system Figure 2 is a picture of a Go-Pro classic water submergible digital wireless camera.
Figure 3 is a picture a classic large scale survey type ruler.
Figure 4 is a picture of a classic hydrostatic pressure water level measurement equipment equipped with a wireless transmitter mounted at the other end in order to maintain wireless communication with the camera under a sewer overflow condition.
Figure 5 is a picture taken by the camera mounted on the wall of a sewer overflow chamber, showing also the ruler.
Figure 6 is a picture taken by the camera mounted under the man hole cover, showing the PVC pipe used to guide the insertion of the hydrostatic pressure water level measurement equipment.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
In figure 1, an overall system block diagram and data flow diagram such as the picture taken from the wireless camera (bottom left corner of the block diagram) is sent to the wireless hydrostatic pressure sensor, which sent to the wireless gateway, which sent to the wireless reader, which send via different wireless root the picture to the data center where the sewer water level data of the picture is process.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will now be described in more detail, by way of example only, with reference to the accompanying drawings, in which:
Figure 1 is a block diagram and data flow diagram of the overall system Figure 2 is a picture of a Go-Pro classic water submergible digital wireless camera.
Figure 3 is a picture a classic large scale survey type ruler.
Figure 4 is a picture of a classic hydrostatic pressure water level measurement equipment equipped with a wireless transmitter mounted at the other end in order to maintain wireless communication with the camera under a sewer overflow condition.
Figure 5 is a picture taken by the camera mounted on the wall of a sewer overflow chamber, showing also the ruler.
Figure 6 is a picture taken by the camera mounted under the man hole cover, showing the PVC pipe used to guide the insertion of the hydrostatic pressure water level measurement equipment.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
In figure 1, an overall system block diagram and data flow diagram such as the picture taken from the wireless camera (bottom left corner of the block diagram) is sent to the wireless hydrostatic pressure sensor, which sent to the wireless gateway, which sent to the wireless reader, which send via different wireless root the picture to the data center where the sewer water level data of the picture is process.
4 In figure 2, a classic battery operated waterproof wireless digital camera such as the popular Go-Pro camera is mounted on the sewer chamber wall in opposite distance to the area of overflow.
In figure 3, a classic scaled ruler such as the one used by surveyor is mounted on the sewer chamber wall adjacent to the area of overflow. To assure reliable readings at all times the lower part of the ruler is positioned to be below the start point of the overflow level, ideally submerge in the normal (non-overflow) running sewer water.
In figure 4, a non-classic hydrostatic pressure sensor includes a wireless radio receiver a transmitter at the upper end of the sensor, allowing for maintaining the wireless radio antenna above the water level during overflow condition. Being located above the overflow water level, the hydrostatic pressure sensor maintains wireless communication with the wireless camera also positioned above the overflow water level. Since the ultrasound sensor is known to be more problematic under difficult sewer water surface condition, the preferred sewer height water level sensor is a hydrostatic pressure sensor.
When the hydrostatic pressure sensor detects the start point of an overflow condition, it wirelessly wakes-up the wireless camera, calling for taking a picture of the overflow area tagged with date and time. Likewise, when the hydrostatic pressure sensor detects nearby the reach of the maximum point overflow level it calls for a second picture.
Finally, when the hydrostatic pressure sensor detects the end point of the overflow it calls for a third picture. The three pictures collected are then transmitted to the hydrostatic pressure sensor which relay the pictures to the backend or Internet portal system via its existing wireless communication means, allowing for checking the calibration at low and high readings and to be sure that the hydrostatic pressure sensor recovers accurately on the way down.
In figure 5, a picture taken by the wireless camera showing a horizontal view of a sewer chamber with the hydrostatic pressure sensor located to the left side of the picture at the bottom end of the white PVC pipe and with the ruler located to the right side of the picture beside the point of overflow. The picture was taken in absence of a sewer water overflow situation.
In figure 6, a picture taken by the wireless camera showing a vertical view of man-hole accessing a sewer overflow chamber. The white PVC pipe is used to guide the insertion of the hydrostatic pressure sensor within the pipe, where the pipe strategically ends at the start point of the sewer water overflow. The ruler is not shown in the picture.
Once the hydrostatic pressure water sewer height level data combined to the pictures are saved at the backend or Internet portal system, image processing is applied to extract the water sewer height of overflow at the time of the picture taken via the usage of the scaled ruler showing the water level line intersection on the ruler. At the current stage of the invention, human processing is used to extract such water level height. Such water level height extracted from the picture is used to back-up the sewer water height level produced by the hydrostatic pressure sensor. Also at the current stage of the invention, human processing is used to analyze the sewer water surface condition, including the surface slant angle at the point of entry into the overflow escape area. Such surface condition will contribute in the calculation of the corresponding overflow rate and finally the total volume of overflow sewer water.
In the future, video analytic signal processing will be used to automatically extract the sewer water height level; whereas such water height level data will be integrated with the hydrostatic pressure water sewer height level data to produce an overall confidence level of integrated overflow sewer water height level.
Likewise, in the future, video analytic signal processing will be used to extract the sewer water surface condition and direction of water flow at the overflow escape area.
Other preferred embodiments:
A further application of the invention also applies to replace mandatory human physical inspection of overflow chamber on a regular basis. The wireless camera takes pictures at present fixed time interval, even in absence of overflow condition.
A further application of the invention uses an ultrasound sewer water height level measurement equipment in replacement or in combination with a hydrostatic pressure sewer water height level measurement equipment.
In figure 3, a classic scaled ruler such as the one used by surveyor is mounted on the sewer chamber wall adjacent to the area of overflow. To assure reliable readings at all times the lower part of the ruler is positioned to be below the start point of the overflow level, ideally submerge in the normal (non-overflow) running sewer water.
In figure 4, a non-classic hydrostatic pressure sensor includes a wireless radio receiver a transmitter at the upper end of the sensor, allowing for maintaining the wireless radio antenna above the water level during overflow condition. Being located above the overflow water level, the hydrostatic pressure sensor maintains wireless communication with the wireless camera also positioned above the overflow water level. Since the ultrasound sensor is known to be more problematic under difficult sewer water surface condition, the preferred sewer height water level sensor is a hydrostatic pressure sensor.
When the hydrostatic pressure sensor detects the start point of an overflow condition, it wirelessly wakes-up the wireless camera, calling for taking a picture of the overflow area tagged with date and time. Likewise, when the hydrostatic pressure sensor detects nearby the reach of the maximum point overflow level it calls for a second picture.
Finally, when the hydrostatic pressure sensor detects the end point of the overflow it calls for a third picture. The three pictures collected are then transmitted to the hydrostatic pressure sensor which relay the pictures to the backend or Internet portal system via its existing wireless communication means, allowing for checking the calibration at low and high readings and to be sure that the hydrostatic pressure sensor recovers accurately on the way down.
In figure 5, a picture taken by the wireless camera showing a horizontal view of a sewer chamber with the hydrostatic pressure sensor located to the left side of the picture at the bottom end of the white PVC pipe and with the ruler located to the right side of the picture beside the point of overflow. The picture was taken in absence of a sewer water overflow situation.
In figure 6, a picture taken by the wireless camera showing a vertical view of man-hole accessing a sewer overflow chamber. The white PVC pipe is used to guide the insertion of the hydrostatic pressure sensor within the pipe, where the pipe strategically ends at the start point of the sewer water overflow. The ruler is not shown in the picture.
Once the hydrostatic pressure water sewer height level data combined to the pictures are saved at the backend or Internet portal system, image processing is applied to extract the water sewer height of overflow at the time of the picture taken via the usage of the scaled ruler showing the water level line intersection on the ruler. At the current stage of the invention, human processing is used to extract such water level height. Such water level height extracted from the picture is used to back-up the sewer water height level produced by the hydrostatic pressure sensor. Also at the current stage of the invention, human processing is used to analyze the sewer water surface condition, including the surface slant angle at the point of entry into the overflow escape area. Such surface condition will contribute in the calculation of the corresponding overflow rate and finally the total volume of overflow sewer water.
In the future, video analytic signal processing will be used to automatically extract the sewer water height level; whereas such water height level data will be integrated with the hydrostatic pressure water sewer height level data to produce an overall confidence level of integrated overflow sewer water height level.
Likewise, in the future, video analytic signal processing will be used to extract the sewer water surface condition and direction of water flow at the overflow escape area.
Other preferred embodiments:
A further application of the invention also applies to replace mandatory human physical inspection of overflow chamber on a regular basis. The wireless camera takes pictures at present fixed time interval, even in absence of overflow condition.
A further application of the invention uses an ultrasound sewer water height level measurement equipment in replacement or in combination with a hydrostatic pressure sewer water height level measurement equipment.
Claims (19)
1. An apparatus integrating a camera system with a liquid height level measuring equipment, comprising:
a fixed camera mounted above the liquid level aimed at a scaled ruler; and a said scaled ruler partially submerged into the liquid and partially exposed above the liquid surface level; and a liquid height level electronic measurement equipment; and a communication means between the said fixed camera and the said liquid height level electronic measurement equipment.
a fixed camera mounted above the liquid level aimed at a scaled ruler; and a said scaled ruler partially submerged into the liquid and partially exposed above the liquid surface level; and a liquid height level electronic measurement equipment; and a communication means between the said fixed camera and the said liquid height level electronic measurement equipment.
2. A method integrating a camera system to a liquid height level measuring equipment, comprising:
a liquid height level electronic measurement equipment that when the liquid height level exceed a preset recorded threshold sends a trigger signal to the camera; and a camera that when it receives the said trigger signal activates, taking a picture;
and a means of communication for the camera to send the said taken picture to the liquid height level electronic measurement equipment and;
a means to integrate the said taken picture with the liquid height level measuring equipment,
a liquid height level electronic measurement equipment that when the liquid height level exceed a preset recorded threshold sends a trigger signal to the camera; and a camera that when it receives the said trigger signal activates, taking a picture;
and a means of communication for the camera to send the said taken picture to the liquid height level electronic measurement equipment and;
a means to integrate the said taken picture with the liquid height level measuring equipment,
3. A apparatus as claimed in claim 1, wherein the liquid height level measuring equipment is a hydrostatic pressure liquid height level equipment.
4. An apparatus as claimed in claim 1, wherein the liquid height level measuring equipment is an ultrasound liquid height level equipment.
5. An apparatus as claimed in claim 1, wherein the liquid height level measuring equipment is a simple liquid presence sensor.
6. An apparatus as claimed in claim 1, wherein the fixed camera is a digital wireless camera with wide angle lens and flash.
7. A means of communication as claimed in claim 1 and 2, wherein the communication is a bi-directional wireless communication optimized for short range, lower power, short burst and medium data volume.
8. A means to integrate as claimed in claim 2, the picture with the liquid height level measuring equipment comprising:
A means of communication as claimed in claim 7, wherein the communication is wireless to send the data comprising the picture and the liquid height level measurement to a server; and A visual technique at the server side to read the liquid level from the picture; and An arithmetic means to integrate the liquid height level obtained from the picture with the liquid height level obtained from the electronic equipment.
A means of communication as claimed in claim 7, wherein the communication is wireless to send the data comprising the picture and the liquid height level measurement to a server; and A visual technique at the server side to read the liquid level from the picture; and An arithmetic means to integrate the liquid height level obtained from the picture with the liquid height level obtained from the electronic equipment.
9. A visual technique as claimed in claim 8, wherein classic analytical digital image processing is used to extract the liquid height level from the scale marked on the ruler.
10, A visual technique as claimed in claim 8, wherein an human is used to extract the liquid height level from the scale marked on the ruler.
11. An arithmetic means as claimed in claim 8, wherein the integration:
in case of discrepancy, defined as more than 20% deviation between both liquid height levels, favor the liquid height level produced the visual technique as claimed in claims 9 and 10; and in case of agreement, defined as less than 20% deviation between both liquid height levels, compute the average between the liquid height level produced the visual technique as claimed in claims 9 and 10 and the liquid height level measurement equipment as claimed in claims 4, 5 and 6; and in all cases produce a confidence level associated with every liquid height level measurement.
in case of discrepancy, defined as more than 20% deviation between both liquid height levels, favor the liquid height level produced the visual technique as claimed in claims 9 and 10; and in case of agreement, defined as less than 20% deviation between both liquid height levels, compute the average between the liquid height level produced the visual technique as claimed in claims 9 and 10 and the liquid height level measurement equipment as claimed in claims 4, 5 and 6; and in all cases produce a confidence level associated with every liquid height level measurement.
12. An operational environment as claimed in claims 1 and 2, wherein the environment is a sewer overflow chamber and the liquid is sewer water.
13. An operational environment as claimed in claims 1 and 2, wherein the environment is a liquid reservoir.
14. An operational environment as claimed as in claims 12 and 13 characterized by liquid surface turbulence, surface waves, surface foam formation and floating debris.
15. A method as claimed in claim 2, wherein the still picture is replaced by a video.
16. A ruler as claimed in claim 1, wherein the scale marked in the ruler is readable under a combination of camera flash on a wet surface.
17. An apparatus as claimed in claim 1 is powered by batteries.
18. An apparatus as claimed in claim 1 is waterproof.
19. An apparatus as claimed in claim 1 is mounted either vertically or horizontally using a detachable bracket, wherein the bracket can be hold by screws or margents.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2870189A CA2870189A1 (en) | 2014-11-12 | 2014-11-12 | Improved apparatus and methode for measuring and monitoring the water height level and corresponding volume of overflow water in sewer overflow chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2870189A CA2870189A1 (en) | 2014-11-12 | 2014-11-12 | Improved apparatus and methode for measuring and monitoring the water height level and corresponding volume of overflow water in sewer overflow chamber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2870189A1 true CA2870189A1 (en) | 2016-05-12 |
Family
ID=55949183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2870189A Abandoned CA2870189A1 (en) | 2014-11-12 | 2014-11-12 | Improved apparatus and methode for measuring and monitoring the water height level and corresponding volume of overflow water in sewer overflow chamber |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2870189A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109443465A (en) * | 2018-12-28 | 2019-03-08 | 深圳衡伟环境技术有限公司 | A kind of excess flow on-Line Monitor Device and construction method |
| CN111750955A (en) * | 2020-06-24 | 2020-10-09 | 武汉世纪水元科技股份有限公司 | Hybrid power supply water level video identification forecasting system |
-
2014
- 2014-11-12 CA CA2870189A patent/CA2870189A1/en not_active Abandoned
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109443465A (en) * | 2018-12-28 | 2019-03-08 | 深圳衡伟环境技术有限公司 | A kind of excess flow on-Line Monitor Device and construction method |
| CN109443465B (en) * | 2018-12-28 | 2024-05-31 | 深圳衡伟环境技术有限公司 | Overflow flow online monitoring device and construction method |
| CN111750955A (en) * | 2020-06-24 | 2020-10-09 | 武汉世纪水元科技股份有限公司 | Hybrid power supply water level video identification forecasting system |
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| Date | Code | Title | Description |
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| FZDE | Dead |
Effective date: 20161114 |