A monitoring device and method for detecting illegally discharged sewage by the roadside

Abstract

The present invention discloses a monitoring device and method for illegal sewage discharge beside roadsides, which relates to the technical field of environmental monitoring and includes: a distributed sensing optical fiber, which is distributed in an S shape inside a section of ditch and on both sides of the ditch bank. The part of the distributed sensing optical fiber inside the ditch is arranged on the water surface inside the ditch, and the part of the distributed sensing optical fiber on both sides of the ditch bank is buried under the bank and the rainwater confluence ditch; an optical time domain reflectometer, connected to the end of the distributed sensing optical fiber; a monitoring and analysis module, electrically connected to the optical time domain reflectometer; and a plurality of pan-tilt cameras, evenly distributed on one side of the bank and electrically connected to the monitoring and analysis module, which can monitor the illegal sewage discharge situation in the roadside ditch in real time and effectively reduce the false alarm rate.

Description

Technical Field

[0001] The present invention belongs to the technical field of environmental monitoring, and more specifically, relates to a monitoring device and method for detecting illegal sewage discharge by the roadside. Background Art

[0002] With the improvement of the society's requirements for environmental protection, environmental monitoring is facing increasingly high demands. Some illegal enterprises use tank trucks to illegally discharge sewage by the roadside. This way of illegal discharge has the characteristics of strong concealment and randomness; roadside ditches, especially those in remote areas, are often the key locations for illegal sewage discharge, and it is often not discovered until after a period of illegal discharge has caused relatively serious pollution, making it more difficult to control and monitor the pollution.

[0003] Distributed sensing has the characteristics of large monitoring range, convenient layout, and low cost, and can be used to monitor illegal sewage discharge by the roadside; however, distributed sensing itself also has the disadvantages of low positioning accuracy and high false alarm rate. Generally, the illegal discharge in roadside ditches is mainly industrial wastewater, and in fact, roadside ditches also undertake the function of accumulating daily precipitation. This poses a challenge to the specific application of distributed sensing. During the monitoring process of distributed sensing, precipitation will enter the roadside ditch from the rainwater confluence ditch, and the situation is extremely similar to that of illegal sewage discharge, and it is difficult for existing monitoring equipment to avoid false alarms. Summary of the Invention

[0004] The purpose of the present invention is to provide a monitoring device and method for detecting illegal sewage discharge by the roadside in view of the deficiencies in the prior art, which can effectively reduce the false alarm rate and lay a good foundation for the application of distributed sensing in environmental monitoring.

[0005] To achieve the above object, the present invention provides a monitoring device for detecting illegal sewage discharge by the roadside, including:

[0006] A distributed sensing optical fiber, which is distributed in an S shape inside a section of ditch and on both sides of the ditch bank. The part of the distributed sensing optical fiber inside the ditch is arranged on the water surface in the ditch, and the part of the distributed sensing optical fiber on both sides of the ditch bank is buried under the bank and below the rainwater confluence ditch;

[0007] An optical time domain reflectometer, connected to the end of the distributed sensing optical fiber;

[0008] A monitoring and analysis module, electrically connected to the optical time domain reflectometer;

[0009] A plurality of pan-tilt cameras, evenly distributed on one side of the bank and electrically connected to the monitoring and analysis module.

[0010] Optionally, at least two distributed sensing optical fibers are arranged side by side, and laser signals can be incident into the at least two distributed sensing optical fibers simultaneously.

[0011] Optionally, a buoy is fixed outside the distributed sensing optical fiber arranged on the water surface in the ditch.

[0012] Optionally, a plurality of buoys are provided, and the plurality of buoys are evenly distributed on the distributed sensing optical fiber on the water surface in the ditch.

[0013] Optionally, the interval between the buoys is 5m - 10m.

[0014] Optionally, traction lines are connected to both sides of the buoy, and the outer ends of the traction lines are fixed to the anchor points on the two side banks of the ditch.

[0015] Optionally, a margin of 5m - 10m is reserved at the turning point where the distributed sensing optical fiber turns from inside the ditch to the bank.

[0016] Optionally, the material of the traction line is nylon line.

[0017] The present invention also provides a monitoring method for illegal sewage discharge beside the road, including:

[0018] Step 1: Calibrate the corresponding spatial positions of the distributed sensing optical fiber on the water surface and the inner part of the bank according to the length to jointly determine the illegal discharge event and locate and calibrate the position of the rainwater confluence ditch;

[0019] Step 2: Start the optical time domain reflectometer, inject a laser signal into the distributed sensing optical fiber, and use the optical time domain reflectometer to monitor the temperature and vibration conditions at different calibrated positions of the distributed sensing optical fiber;

[0020] Step 3: The optical time domain reflectometer transmits the monitoring data to the monitoring and analysis module, and the monitoring and analysis module analyzes the temperature and vibration conditions at different positions of the distributed sensing optical fiber;

[0021] Step 4: When there are changes in the temperature and vibration conditions between the distributed sensing optical fiber on the bank part on one side of the ditch and the distributed sensing optical fiber on the water surface part, it is used as the first criterion for illegal discharge events;

[0022] Step 5: Take the position with continuous high vibration and obvious temperature change as the key monitoring object. If this position is near the calibration point of the rainwater confluence ditch, compare the monitoring conditions of the calibration points of the rainwater confluence ditch around this key monitoring position. If there are similar continuous high vibrations and obvious temperature changes and the intensities are similar, it is determined that the vibration and temperature changes here are caused by heavy rainfall in a short time;

[0023] Step 6: Take the positions with continuous high vibration and obvious temperature change as the key monitoring objects. If there is no such continuous high vibration and obvious temperature change at the calibration points of the rainwater runoff ditches around this position, it is determined that this key monitoring position is a sewage theft monitoring area. The monitoring and analysis module controls the pan-tilt camera to take pictures and evidence at this place. After confirming the fact of sewage theft by watching the images taken by the pan-tilt camera, the situation is reported to the environmental protection department.

[0024] Optionally, it further includes: after the step 6, the time when the tanker drives into the ditch section can also be recorded by the roadside camera. If the roadside camera does not capture the tanker driving out of the ditch section within the preset time, the sewage theft event in this ditch section can be further confirmed.

[0025] The present invention provides a monitoring device and method for sewage theft by the roadside, and its beneficial effects are as follows: Distributed sensing optical fibers are arranged on the water surface inside the ditch, on the shore, and in the rainwater runoff ditches on the shore, which can simultaneously monitor the water flow temperature and vibration conditions inside the ditch and along both sides of the ditch; it has a monitoring and analysis module, and through the comparative analysis of multiple criteria, the false alarm rate of sewage theft is reduced; it has a pan-tilt camera, which can take pictures, confirm and obtain evidence after detecting sewage theft, and conduct real-time monitoring, with good use effects.

[0026] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. Description of the Drawings

[0027] By describing the exemplary embodiments of the present invention in more detail in conjunction with the drawings, the above and other objects, features, and advantages of the present invention will become more obvious. Among them, in the exemplary embodiments of the present invention, the same reference numerals generally represent the same components.

[0028] Figure 1 It shows a schematic diagram of the distribution position of the distributed sensing optical fiber of a monitoring device for sewage theft by the roadside according to an embodiment of the present invention.

[0029] Figure 2 It shows a schematic diagram of the distribution position of the distributed sensing optical fiber of a monitoring device for sewage theft by the roadside according to another embodiment of the present invention.

[0030] Description of the Reference Numerals:

[0031] 1. Distributed sensing optical fiber; 2. Optical time domain reflectometer; 3. Monitoring and analysis module; 4. Pan-tilt camera; 5. Buoy; 6. Towing line; 7. Anchor point; 8. Shore; 9. Ditch; 10. Rainwater runoff ditch. Detailed Description of the Invention

[0032] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0033] The present invention provides a monitoring device for detecting illegal sewage discharge beside the road, comprising:

[0034] A distributed sensing optical fiber, which is distributed in an S shape inside a section of ditch and on both sides of the ditch bank. The part of the distributed sensing optical fiber inside the ditch is arranged on the water surface inside the ditch, and the parts of the distributed sensing optical fiber on both sides of the ditch bank are buried under the bank and below the rainwater confluence ditch;

[0035] An optical time domain reflectometer, connected to the end of the distributed sensing optical fiber;

[0036] A monitoring and analysis module, electrically connected to the optical time domain reflectometer;

[0037] A plurality of pan-tilt cameras, evenly distributed on one side of the bank and electrically connected to the monitoring and analysis module.

[0038] Specifically, for a road with drainage ditches beside it, the heights of both sides of the ditch bank are higher than the daily water level height of the ditch, and rainwater confluence ditches are provided at fixed positions on both sides of the ditch bank; the optical time domain reflectometer emits laser light into the distributed sensing optical fiber, and the temperature and vibration conditions of the water flow inside the ditch and on the bank are monitored in real time through the distributed sensing optical fiber arranged on the water surface inside the ditch and inside both sides of the ditch bank. The monitoring and analysis module can analyze whether there is illegal sewage discharge into the ditch through the signals monitored by the optical time domain reflectometer; when there is precipitation in this area, part of the rainwater directly falls into the ditch, and part of the rainwater flows into the ditch through the rainwater confluence ditch. At this time, obvious temperature changes and strong vibrations occur in the distributed sensing optical fiber inside the ditch and on the bank. To prevent misjudgment of illegal sewage discharge by this monitoring device, the monitoring and analysis module analyzes the monitoring conditions of the distributed sensing optical fiber at multiple surrounding rainwater confluence ditches. If obvious temperature changes and strong vibrations also occur at each surrounding rainwater confluence ditch, it can be determined that there is short-term precipitation in this area; if obvious temperature changes and strong vibrations are monitored only in a small area of a certain place by the distributed sensing optical fiber, it is determined that there is illegal sewage discharge in this area. At this time, the pan-tilt camera takes pictures and collects evidence of this area to stop and deal with the illegal sewage discharge situation in this area.

[0039] In one example, at least two distributed sensing optical fibers are arranged side by side, and laser signals can be incident into the at least two distributed sensing optical fibers simultaneously.

[0040] Specifically, the setting of at least two distributed sensing optical fibers arranged side by side can improve the reliability of the monitoring device. The same laser signal is introduced into the two distributed sensing optical fibers for monitoring. When an accidental break occurs in one of them, the other one can still monitor all positions in its coverage area. The same laser signal in the same or different directions can be incident on at least two distributed sensing optical fibers as a monitoring backup or reference.

[0041] In one example, a buoy is fixed outside the distributed sensing optical fiber arranged on the water surface in the ditch.

[0042] Specifically, the distributed sensing optical fiber floats on the water surface in the ditch through the buoy.

[0043] In one example, a plurality of buoys are provided, and the plurality of buoys are evenly distributed on the distributed sensing optical fiber on the water surface in the ditch.

[0044] In one example, the interval between the buoys is 5m - 10m.

[0045] Specifically, the evenly distributed buoys can not only ensure the uniform buoyancy received by the distributed sensing optical fiber, but also be used as the calibration of the monitoring position, which is convenient for the positioning and judgment of the monitoring results.

[0046] In one example, traction lines are connected to both sides of the buoy, and the outer ends of the traction lines are fixed to the anchor points on the two sides of the ditch bank.

[0047] Specifically, the buoy is traction-fixed through the traction lines on both sides of the buoy to ensure that the distributed sensing optical fiber floats in the middle of the ditch, which is beneficial to the monitoring effect of the distributed sensing optical fiber.

[0048] In one example, a margin of 5m - 10m is reserved at the turning point where the distributed sensing optical fiber turns from the ditch to the shore.

[0049] Specifically, the setting of the reserved margin of the distributed sensing optical fiber can utilize the reserved margin of the distributed sensing optical fiber when dredging the ditch and removing sundries. The traction rope is used to move the optical fiber on the water surface, which is convenient for ditch cleaning. After cleaning, it is re-fixed to the anchor point, and the position of the distributed sensing optical fiber is corrected.

[0050] In one example, the material of the traction line is nylon line.

[0051] In other examples, the material of the traction line can also be silica gel braided line or polyethylene fiber braided line.

[0052] The present invention also provides a monitoring method for illegal sewage discharge by the roadside, including:

[0053] Step 1: Calibrate the corresponding spatial positions of the distributed sensing optical fiber in the water surface and the inner part of the shore according to the length to jointly determine the illegal discharge event, and locate and calibrate the position of the rainwater confluence ditch;

[0054] Step 2: Start the optical time domain reflectometer, inject a laser signal into the distributed sensing optical fiber, and use the optical time domain reflectometer to monitor the temperature and vibration conditions at different calibrated positions of the distributed sensing optical fiber;

[0055] Step 3: The optical time domain reflectometer transmits the monitored data to the monitoring and analysis module, and the monitoring and analysis module analyzes the temperature and vibration conditions at different positions of the distributed sensing optical fiber;

[0056] Step 4: When there are changes in the temperature and vibration conditions of the distributed sensing optical fiber in the shore part on one side of the ditch and the distributed sensing optical fiber in the water surface part, as the first criterion for the illegal discharge event, it can be determined by the change in the temperature and vibration conditions input by a single distributed sensing optical fiber or the change in the temperature and vibration conditions at different positions in two or more distributed sensing optical fibers;

[0057] Step 5: Take the position with continuous high vibration and obvious temperature change as the key monitoring object. If this position is near the calibration point of the rainwater confluence ditch, compare the monitoring conditions of the calibration points of the rainwater confluence ditch around this key monitoring position. If there are similar continuous high vibrations and obvious temperature changes and the intensities are similar, it is determined that the vibration and temperature changes here are caused by heavy precipitation in a short time;

[0058] Step 6: Take the position with continuous high vibration and obvious temperature change as the key monitoring object. If there are no such continuous high vibrations and obvious temperature changes at the calibration points of the rainwater confluence ditch around this position, it is determined that this key monitoring position is the illegal sewage discharge monitoring area. The monitoring and analysis module controls the pan-tilt camera to take pictures and evidence here. After confirming the fact of illegal sewage discharge by watching the images taken by the pan-tilt camera, the situation is reported to the environmental protection department.

[0059] In an example, it further includes: after the said Step 6, the time when the tanker drives into the ditch section can also be recorded by the roadside camera. If the roadside camera does not capture the tanker driving out of the ditch section within the preset time, the illegal sewage discharge event in this ditch section can be further confirmed.

[0060] Specifically, after Step 6, the original roadside camera can be used to record whether there is a tanker staying in the illegal sewage discharge monitoring area at the corresponding time to confirm the illegal discharge event; the original roadside camera is used to record the time when the tanker drives into the ditch section. If the roadside camera does not capture the tanker driving out of the ditch section within the preset time, an alarm can be issued through the alarm device to further confirm the illegal sewage discharge event in this ditch section.

[0061] Embodiment

[0062] As Figure 1 shown, the present invention provides a monitoring device for detecting illegal sewage discharge along the roadside, comprising:

[0063] A distributed sensing optical fiber 1, which is distributed in an S shape inside a section of ditch 9 and on both sides of the bank 8 of the ditch 9. The part of the distributed sensing optical fiber 1 inside the ditch 9 is arranged on the water surface in the ditch 9, and the part of the distributed sensing optical fiber 1 on both sides of the bank 8 of the ditch 9 is buried under the bank 8 and the rainwater confluence ditch 10;

[0064] An optical time domain reflectometer 2, connected to the end of the distributed sensing optical fiber 1;

[0065] A monitoring and analysis module 3, electrically connected to the optical time domain reflectometer 2;

[0066] A plurality of pan-tilt cameras 4, evenly distributed on one side of the bank 8 and electrically connected to the monitoring and analysis module 3.

[0067] In this embodiment, at least two distributed sensing optical fibers 1 are arranged side by side, and laser signals can be incident from the at least two distributed sensing optical fibers 1 simultaneously.

[0068] In this embodiment, a buoy 5 is fixed outside the distributed sensing optical fiber 1 arranged on the water surface in the ditch 9.

[0069] In this embodiment, a plurality of buoys 5 are provided, and the plurality of buoys 5 are evenly distributed on the distributed sensing optical fiber 1 on the water surface in the ditch 9, and the interval between the buoys 5 is 10 m.

[0070] In this embodiment, traction lines 6 are connected to both sides of the buoy 5, and the outer ends of the traction lines 6 are fixed to the anchor points 7 on both sides of the bank 8 of the ditch 9.

[0071] In this embodiment, a 5-m margin is reserved at the turning point where the distributed sensing optical fiber 1 turns from inside the ditch 9 to the bank 8.

[0072] In this embodiment, the material of the traction line 6 is nylon wire.

[0073] The present invention also provides a monitoring method for detecting illegal sewage discharge along the roadside, comprising:

[0074] Step 1: Calibrate the spatial positions corresponding to the lengths of the part of the distributed sensing optical fiber 1 on the water surface and the part inside the bank 8 to jointly determine illegal discharge events, and calibrate the position of the rainwater confluence ditch 10 to facilitate the comparative analysis of the monitoring situation of the rainwater confluence ditch 10 around when obvious temperature changes and strong vibrations are detected by a certain part of the distributed sensing optical fiber 1;

[0075] Step 2: Start the optical time domain reflectometer 2, inject a laser signal into the distributed sensing optical fiber 1, and use the optical time domain reflectometer 2 to monitor the temperature and vibration conditions at different calibrated positions of the distributed sensing optical fiber 1;

[0076] Step 3: The optical time domain reflectometer 2 transmits the monitored data to the monitoring and analysis module 3. The monitoring and analysis module 3 analyzes the temperature and vibration conditions at different positions of the distributed sensing optical fiber 1. When obvious temperature changes or strong vibrations are detected at a certain part of the distributed sensing optical fiber 1, the monitoring and analysis module 3 determines whether a sewage theft and discharge event has occurred at that place through comparison and analysis;

[0077] Step 4: When there are changes in the temperature and vibration conditions of the distributed sensing optical fiber 1 at the part of the bank 8 on one side of the ditch 9 and the part of the distributed sensing optical fiber 1 on the water surface, it is used as the first criterion for the sewage theft and discharge event. At this time, it is also necessary to further compare and analyze the changes in the temperature and vibration conditions monitored by the distributed sensing optical fiber 1 at this place through the monitoring and analysis module 3 to avoid misjudgment;

[0078] Step 5: Take the position with continuous high vibration and obvious temperature change as the key monitoring object. If this position is near the calibration point of the rainwater confluence ditch 10, compare the monitoring conditions of the calibration points of the rainwater confluence ditch 10 around this key monitoring position. If there are similar continuous high vibrations and obvious temperature changes, and the intensities are similar, it is determined that the vibration and temperature changes here are caused by heavy rainfall in a short period of time;

[0079] Step 6: Take the position with continuous high vibration and obvious temperature change as the key monitoring object. If there are no such continuous high vibrations and obvious temperature changes at the calibration points of the rainwater confluence ditch 10 around this position, it is determined that this key monitoring position is the sewage theft and discharge monitoring area. The monitoring and analysis module 3 controls the pan-tilt camera 4 to take pictures and evidence at this place. After confirming the fact of sewage theft and discharge by watching the images taken by the pan-tilt camera 4, report the situation to the environmental protection department.

[0080] In this embodiment, it further includes: after the said Step 6, the time when the tanker drives into the ditch section can also be recorded by the roadside camera. If the roadside camera does not capture the tanker driving out of the ditch section within the preset time, the sewage theft and discharge event in this ditch section can be further confirmed.

[0081] Such as Figure 2As shown, in another embodiment of the present invention, for the dry waterless ditch 9 in daily use, the distributed sensing optical fiber in the present invention can also adopt a U-shaped distribution. The distributed sensing optical fiber with a U-shaped distribution is only buried under the shore 8 and the rainwater confluence ditch 10, and there is no need to lay it in the ditch 9, which can save the buoys, towing lines and anchor points for fixing the distributed sensing optical fiber arranged on the water surface in the ditch 9. At this time, whether a sewage theft event occurs can be determined by the same method according to the changes in temperature and vibration monitored by the distributed sensing optical fiber buried under the shore 8 and the rainwater confluence ditch 10, which is more cost-saving, and the user can use it flexibly according to different situations of the ditch 9.

[0082] The embodiments of the present invention have been described above. The above description is exemplary and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A monitoring method for illegal sewage discharge by the roadside, using a monitoring device for illegal sewage discharge by the roadside, characterized in that, The monitoring device for illegal sewage discharge by the roadside includes: A distributed sensing optical fiber, which is distributed in an S shape inside a section of ditch and on both sides of the ditch bank. The part of the distributed sensing optical fiber inside the ditch is arranged on the water surface inside the ditch, and the part of the distributed sensing optical fiber on both sides of the ditch bank is buried under the bank and under the rainwater confluence ditch; An optical time domain reflectometer, connected to the end of the distributed sensing optical fiber; A monitoring and analysis module, electrically connected to the optical time domain reflectometer; Multiple pan-tilt cameras, evenly distributed on one side of the bank, and electrically connected to the monitoring and analysis module; The monitoring method for illegal sewage discharge by the roadside includes: Step 1: Calibrate the spatial positions corresponding to the lengths of the water surface and the inner part of the bank of the distributed sensing optical fiber to jointly determine illegal discharge events, and locate and calibrate the position of the rainwater confluence ditch; Step 2: Start the optical time domain reflectometer, inject a laser signal into the distributed sensing optical fiber, and use the optical time domain reflectometer to monitor the temperature and vibration conditions at different calibrated positions of the distributed sensing optical fiber; Step 3: The optical time domain reflectometer transmits the monitoring data to the monitoring and analysis module, and the monitoring and analysis module analyzes the temperature and vibration conditions at different positions of the distributed sensing optical fiber; Step 4: When there are changes in the temperature and vibration conditions between the distributed sensing optical fiber on one side of the ditch bank and the distributed sensing optical fiber on the water surface part, it is used as the first criterion for illegal discharge events; Step 5: Take the position with continuous high vibration and obvious temperature change as the key monitoring object. If this position is near the calibration point of the rainwater confluence ditch, compare the monitoring conditions of the calibration points of the rainwater confluence ditch around this key monitoring position. If there are similar continuous high vibrations and obvious temperature changes, and the intensities are similar, it is determined that the vibration and temperature changes here are caused by short-term heavy precipitation; Step 6: Take the position with continuous high vibration and obvious temperature change as the key monitoring object. If there are no such continuous high vibrations and obvious temperature changes at the calibration points of the rainwater confluence ditch around this position, it is determined that this key monitoring position is the illegal sewage discharge monitoring area. The monitoring and analysis module controls the pan-tilt camera to take pictures and evidence at this place. After confirming the fact of illegal sewage discharge by watching the images taken by the pan-tilt camera, the situation is reported to the environmental protection department.

2. The monitoring method for detecting illegal sewage discharge by the roadside according to claim 1, wherein At least two distributed sensing optical fibers are arranged side by side, and the laser signal can be incident from at least two distributed sensing optical fibers at the same time.

3. The monitoring method for illegal sewage discharge by the roadside according to claim 1, characterized in that, A buoy is fixed outside the distributed sensing optical fiber arranged on the water surface inside the ditch.

4. The monitoring method for detecting illegal sewage discharge by the roadside according to claim 3, characterized in that, A plurality of the buoys are provided, and the plurality of buoys are evenly distributed on the distributed sensing optical fiber on the water surface inside the ditch.

5. A monitoring method for detecting illegal sewage discharge by the roadside according to claim 4, characterized in that, The interval between the buoys is 5m - 10m.

6. A monitoring method for detecting illegal sewage discharge by the roadside according to claim 4, characterized in that, Both sides of the buoy are connected with towing lines, and the outer ends of the towing lines are fixed to the anchor points on both sides of the ditch bank.

7. A monitoring method for detecting illegal sewage discharge beside roads according to claim 1, characterized in that, A margin of 5m - 10m is reserved at the turning point where the distributed sensing optical fiber turns from inside the ditch to the bank.

8. The monitoring method for detecting illegal sewage discharge by the roadside according to claim 6, wherein The material of the towing line is nylon line.

9. A monitoring method for detecting illegal sewage discharge by the roadside according to claim 1, characterized in that It further includes: After Step 6, the time when the tanker drives into the ditch section is also recorded by the roadside camera. If the roadside camera does not capture the tanker driving out of the ditch section within the preset time, the illegal sewage discharge event in this ditch section is further confirmed.

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