River water quality on-line monitoring system

Abstract

The application provides a river water body water quality on-line monitoring system, which comprises a water body treatment unit, a monitoring unit for monitoring water quality and a remote monitoring center; the monitoring unit comprises a water body monitoring module, a first water quality monitoring module, a second water quality monitoring module and a control module; the water body treatment unit comprises a pre-settling module and a water flow control module; the water flow control module comprises a first chamber and a second chamber, the first chamber and the second chamber are communicated with an output port of the pre-settling module through input flexible pipelines, the first chamber and the second chamber are respectively arranged on two lifting mechanisms with the same structure, the control module controls the action of the lifting mechanisms, two electromagnetic valves are respectively arranged on the input flexible pipelines of the first chamber and the second chamber, the first water quality monitoring module is arranged on the first chamber, and the second water quality monitoring module is arranged on the second chamber; a control input end of the electromagnetic valve is connected to the control module, output ends of the water body monitoring module and the water quality monitoring module are connected to the control module, and the control module is in communication connection with the remote monitoring center through a wireless transmission module.

Description

Technical Field

[0001] This invention relates to a monitoring system, and more particularly to an online monitoring system for river water quality. Background Technology

[0002] In existing technologies, river water quality monitoring is generally carried out manually. This involves technicians taking samples of the river water regularly or irregularly, and then analyzing them in a laboratory to obtain the corresponding data. This method suffers from low data continuity and low efficiency. Since this testing method is similar to random sampling, omissions are possible. More importantly, after the sampled water is taken to the laboratory for analysis, it is easy to be polluted due to storage and transportation interference, resulting in a large deviation from the actual collected samples and low accuracy.

[0003] With the development of technology, people have proposed some water quality monitoring systems based on the Internet of Things (IoT). These systems monitor water quality information through sensors, upload the data, and then analyze the water quality using the uploaded data. This method effectively solves the problems mentioned above. However, the following issues still exist:

[0004] Current online monitoring technologies typically involve directly placing sensors in the river to collect data. However, while this method can collect data, the data is inaccurate, especially for parameters such as pH and conductivity. This is because rivers contain a significant amount of sediment, which interferes with the electrodes of the conductivity and pH sensors, resulting in low accuracy. Even if the water sample is taken and allowed to settle before testing, the pH and conductivity data collected in the settled state still show deviations and remain inaccurate.

[0005] Therefore, in order to solve the above-mentioned technical problems, it is urgent to propose a new technical approach. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide an online water quality monitoring system for rivers, which can reduce the impact of sediment on sensors during water quality monitoring, and ensure that water quality is monitored under the same conditions as the river flow velocity, thereby effectively ensuring monitoring accuracy and providing accurate data for subsequent pollution treatment.

[0007] The present invention provides an online monitoring system for river water quality, comprising a water treatment unit, a monitoring unit for monitoring water quality, and a remote monitoring center;

[0008] The monitoring unit includes a water body monitoring module, a water quality monitoring module, and a control module;

[0009] The water quality monitoring module includes a first water quality monitoring module and a second water quality monitoring module. The first water quality monitoring module includes a pH sensor and a conductivity sensor.

[0010] The water treatment unit includes a pre-sedimentation module and a water flow control module;

[0011] The water flow control module includes a first chamber and a second chamber. The first and second chambers are connected to the output port of the pre-settling module via flexible input pipes. The first and second chambers are respectively located in two identical lifting mechanisms. The control module controls the operation of the lifting mechanisms. Two solenoid valves are respectively installed in the flexible input pipes of the first and second chambers. The first water quality monitoring module is located in the first chamber, and the second water quality monitoring module is located in the second chamber. The control input terminals of the solenoid valves are connected to the control module. The output terminals of the water body monitoring module and the water quality monitoring module are connected to the control module. The control module communicates with a remote monitoring center via a wireless transmission module.

[0012] Furthermore, the lifting mechanism includes a mounting housing, a support plate, and an electric cylinder. Slider blocks are provided on the left and right sides of the support plate, and a sliding groove is provided on the inner side wall of the mounting housing. The sliders are conformally embedded in the sliding grooves and can reciprocate along the length of the sliding grooves. The electric cylinder is located below the support plate, and the power output end of the electric cylinder is fixedly connected to the lower surface of the support plate. The control input end of the electric cylinder is connected to the control output end of the control module.

[0013] Furthermore, the water monitoring module includes a first velocity sensor for monitoring the flow velocity of the river water and a temperature sensor for monitoring the temperature of the river water, with the output terminals of the first velocity sensor and the temperature sensor connected to the input terminal of the control module.

[0014] Furthermore, the water monitoring module also includes a second flow velocity sensor for monitoring the water flow velocity in the first chamber and a third flow velocity sensor for monitoring the second chamber, with the output terminals of the second and third flow velocity sensors connected to the input terminal of the control module.

[0015] Furthermore, the control module adjusts the water flow rate in the first and second detection chambers as follows:

[0016] S1. Set the optimal flow velocity range of the water in the first chamber [a,b]; where a is the lower limit of the optimal flow velocity range of the water in the first chamber, and b is the upper limit of the optimal flow velocity range of the water in the first chamber.

[0017] S2. Obtain the flow velocity from the first flow velocity sensor and determine whether the flow velocity output by the first flow velocity sensor is within the optimal flow velocity range. If so, the control module controls the opening of the solenoid valve of the flexible pipe in the first chamber and controls the action of the electric cylinder in the first chamber to adjust the height difference between the output port of the pre-settling module and the first chamber, so that the flow velocity values ​​output by the first flow velocity sensor and the second flow velocity sensor are equal. If not, proceed to step S3.

[0018] S3. If the flow velocity value output by the first flow velocity sensor is less than a, the control module controls the opening of the solenoid valve of the flexible pipe in the first chamber and controls the action of the electric cylinder in the first chamber to adjust the height difference between the output port of the pre-settling module and the first chamber, so that the flow velocity value output by the second flow velocity sensor is equal to a.

[0019] If the flow velocity value output by the first flow velocity sensor is greater than b, the control module controls the opening of the solenoid valve of the flexible pipe in the first chamber and controls the action of the electric cylinder in the first chamber to adjust the height difference between the output port of the pre-settling module and the first chamber, so that the flow velocity value output by the second flow velocity sensor is equal to b.

[0020] S4. The control module obtains the flow velocity from the first flow velocity sensor, then controls the opening of the solenoid valve of the flexible pipe in the second chamber and controls the action of the electric cylinder in the second chamber to adjust the height difference between the output port of the pre-settling module and the second chamber, so that the flow velocity value output by the third flow velocity sensor is equal to the flow velocity value output by the first flow velocity sensor.

[0021] Furthermore, the pre-settling module includes a settling tank and a water pump;

[0022] The control terminal of the water pump is connected to the control output terminal of the control module. The output port of the water pump is connected to the input port of the settling tank. The output port of the settling tank is connected to the first chamber and the second chamber through a flexible pipe. The bottom inner side of the settling tank is a convex spherical structure. A sewage outlet is provided at the bottom edge of the settling tank, and a sewage discharge electric control valve is provided at the sewage outlet. An electric rotating nozzle is provided at the top of the settling tank, and the control terminal of the electric rotating nozzle is connected to the control module.

[0023] Furthermore, the second water quality monitoring module includes an ORP sensor, a TOC sensor, and a sulfide sensor.

[0024] Furthermore, the control module includes a GPS positioning circuit, a microcontroller, and a memory;

[0025] The GPS positioning circuit is connected to the microcontroller, the microcontroller is connected to the memory, and the microcontroller is connected to the remote monitoring center via a wireless transmission module.

[0026] Furthermore, the remote monitoring center includes a monitoring server, a storage server, input / output devices, and early warning devices;

[0027] The monitoring server and the control module are connected via a wireless transmission module. The monitoring server is also connected to the storage server and to input / output devices and early warning devices.

[0028] Furthermore, the warning device is an audible and visual alarm.

[0029] The beneficial effects of this invention are as follows: This invention can reduce the impact of sediment on sensors during water quality monitoring, and ensure that water quality is monitored under conditions that are the same as the river flow velocity, thereby effectively ensuring monitoring accuracy and providing accurate data for subsequent pollution treatment. Attached Figure Description

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0031] Figure 1 This is a schematic diagram of the electrical structure of the present invention.

[0032] Figure 2 This is a schematic diagram of the settling tank structure of the present invention.

[0033] Figure 3 This is a schematic diagram of the lifting mechanism of the present invention.

[0034] Figure 4 for Figure 3 Top view of the housing after the top cover has been removed. Detailed Implementation

[0035] The present invention will be further described in detail below:

[0036] The present invention provides an online monitoring system for river water quality, comprising a water treatment unit, a monitoring unit for monitoring water quality, and a remote monitoring center;

[0037] The monitoring unit includes a water body monitoring module, a water quality monitoring module, and a control module;

[0038] The water quality monitoring module includes a first water quality monitoring module and a second water quality monitoring module. The first water quality monitoring module includes a pH sensor and a conductivity sensor.

[0039] The water treatment unit includes a pre-sedimentation module and a water flow control module;

[0040] The water flow control module includes a first chamber and a second chamber. The first and second chambers are connected to the output of the pre-settling module via flexible input pipes. The first and second chambers are respectively housed in two identical lifting mechanisms. The control module controls the operation of these lifting mechanisms. Two solenoid valves are respectively installed on the flexible input pipes of the first and second chambers. The first water quality monitoring module is located in the first chamber, and the second water quality monitoring module is located in the second chamber. The control input terminals of the solenoid valves are connected to the control module, and the output terminals of the water body monitoring module and the water quality monitoring module are also connected to the control module. The control module communicates with the remote monitoring center via a wireless transmission module. This structure reduces the impact of sediment on the sensors during water quality monitoring and ensures that water quality is monitored at the same rate as the river flow, thus effectively ensuring monitoring accuracy and providing accurate data for subsequent pollution treatment. The wireless transmission module can be any one of LoRa, ZigBee, UWB, 4G, or 5G modules. Flexible pipes are also installed at the output ports of the first and second chambers to avoid interference with them.

[0041] In this embodiment, the lifting mechanism includes a mounting housing 7, a support plate 9, and an electric cylinder 10. Slider blocks 11 are provided on the left and right sides of the support plate. A groove is provided on the inner wall of the mounting housing. The sliders are conformally embedded in the grooves and can reciprocate along the length of the grooves. The electric cylinder is located below the support plate, and its power output end is fixedly connected to the lower surface of the support plate. The control input end of the electric cylinder is connected to the control output end of the control module. As shown in the figure, the sliders adopt a dovetail structure, which provides good stability. At least two electric cylinders are provided below each support plate. The electric cylinders on the same support plate rise or fall simultaneously. The first chamber 8 and the second chamber (with the same structure as the first chamber, not shown in the figure) are fixedly mounted on two different support plates. Through the above structure, the microcontroller controls the action of the electric cylinders, thereby adjusting the height of the support plate and thus adjusting the height difference between the first and second chambers and the output port of the settling tank.

[0042] In this embodiment, the water monitoring module includes a first velocity sensor for monitoring the flow velocity of the river water and a temperature sensor for monitoring the temperature of the river water. The output terminals of the first velocity sensor and the temperature sensor are connected to the input terminal of the control module.

[0043] The water monitoring module also includes a second flow velocity sensor for monitoring the water flow velocity in the first chamber and a third flow velocity sensor for monitoring the second chamber. The output terminals of the second and third flow velocity sensors are connected to the input terminal of the control module. Furthermore, the first and second chambers are each equipped with a flow sensor. Through the above structure, the flow velocity can be accurately adjusted, and the sensors in the water quality monitoring module can be used to monitor the water quality at the specified flow rate.

[0044] In this embodiment, the control module adjusts the water flow rate in the first detection chamber and the second chamber in the following manner:

[0045] S1. Set the optimal flow velocity range of the water in the first chamber [a, b]; where a is the lower limit of the optimal flow velocity range of the water in the first chamber, and b is the upper limit of the optimal flow velocity range of the water in the first chamber; where the optimal flow velocity range is set experimentally.

[0046] S2. Obtain the flow velocity from the first flow velocity sensor and determine whether the flow velocity output by the first flow velocity sensor is within the optimal flow velocity range. If so, the control module controls the opening of the solenoid valve of the flexible pipe in the first chamber and controls the action of the electric cylinder in the first chamber to adjust the height difference between the output port of the pre-settling module and the first chamber, so that the flow velocity values ​​output by the first flow velocity sensor and the second flow velocity sensor are equal. If not, proceed to step S3.

[0047] S3. If the flow velocity value output by the first flow velocity sensor is less than a, the control module controls the opening of the solenoid valve of the flexible pipe in the first chamber and controls the action of the electric cylinder in the first chamber to adjust the height difference between the output port of the pre-settling module and the first chamber, so that the flow velocity value output by the second flow velocity sensor is equal to a.

[0048] If the flow velocity value output by the first flow velocity sensor is greater than b, the control module controls the opening of the solenoid valve of the flexible pipe in the first chamber and controls the action of the electric cylinder in the first chamber to adjust the height difference between the output port of the pre-settling module and the first chamber, so that the flow velocity value output by the second flow velocity sensor is equal to b.

[0049] S4. The control module obtains the flow velocity from the first flow velocity sensor, then controls the opening of the solenoid valve of the flexible pipe in the second chamber and controls the action of the electric cylinder in the second chamber to adjust the height difference between the output port of the pre-settling module and the second chamber, so that the flow velocity value output by the third flow velocity sensor is equal to the flow velocity value output by the first flow velocity sensor. Flow velocity can affect pH and conductivity readings. However, accurate measurement of pH and conductivity during river flow is crucial for reflecting the fluid's state. Therefore, setting an appropriate flow velocity is essential for ensuring the accuracy of pH and conductivity monitoring results. Adjusting the solenoid valve opening regulates the flow rate, which in turn regulates the flow velocity. However, when adjusting the flow velocity, only the solenoid valve opening needs adjustment. If the flow rate is lower than the set value, it can affect sensor detection. In this case, adjusting the height difference between the first or second chamber and the settling tank is necessary to regulate the flow velocity. This method ensures that the flow velocity is within the optimal range for pH and conductivity measurements, reduces the error between the measured and actual flow velocities, and thus guarantees accuracy while minimizing the impact of sediment. For other parameter measurements, the flow velocity must match the actual flow velocity in the river to ensure synchronization of the measurement environment.

[0050] In this embodiment, the pre-settling module includes a settling tank 1 and a water pump;

[0051] The control terminal of the water pump is connected to the control output terminal of the control module. The output port of the water pump is connected to the input port 6 of the settling tank 1. The output port 4 of the settling tank is connected to the first chamber and the second chamber through a flexible pipe. The bottom inner side of the settling tank has an upwardly convex spherical structure. A sewage outlet 5 is provided at the bottom edge of the settling tank, and a sewage discharge electrically controlled valve is provided at the sewage outlet. An electric rotating nozzle 2 is provided at the top of the settling tank. The electric rotating nozzle is connected to an external water supply device, such as a water pump, through a pipe 3 to provide water for cleaning the settling tank. The control terminal of the electric rotating nozzle is connected to the control module. The water pump draws river water and inputs it into the settling tank, where the settling tank settles larger particles such as silt, thereby reducing the impact of large particles on pH and conductivity. Figure 2 As shown, the outlet of the settling tank is flush with or slightly lower than the inlet of the settling tank to ensure the settling effect. In addition, the electric rotating nozzle facilitates rinsing of the settling tank, and the bottom structure of the settling tank facilitates wastewater discharge.

[0052] In this embodiment, the second water quality monitoring module includes an ORP sensor, a TOC sensor, and a sulfide sensor; of course, more sensors can be set according to actual conditions, which will not be elaborated here.

[0053] In this embodiment, the control module includes a GPS positioning circuit, a microcontroller, and a memory;

[0054] The GPS positioning circuit is connected to the microcontroller, the microcontroller is connected to the memory, and the microcontroller is connected to the remote monitoring center via a wireless transmission module. The microcontroller uses an existing chip, such as the STM32 series microcontroller, and the GPS positioning circuit is used to mark the location of the current monitoring point.

[0055] In this embodiment, the remote monitoring center includes a monitoring server, a storage server, input / output devices, and an early warning device. The monitoring server is connected to the control module via a wireless transmission module, the monitoring server is connected to the storage server, and the monitoring server is connected to the input / output devices and the early warning device. The early warning device is an audible and visual alarm, for example, that issues an alarm when monitored water quality parameters exceed limits. The input / output device uses an existing touchscreen display.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An online water quality monitoring system for rivers, characterized in that: It includes water treatment units, monitoring units for monitoring water quality, and a remote monitoring center; The monitoring unit includes a water body monitoring module, a water quality monitoring module, and a control module; The water quality monitoring module includes a first water quality monitoring module and a second water quality monitoring module. The first water quality monitoring module includes a pH sensor and a conductivity sensor. The water treatment unit includes a pre-sedimentation module and a water flow control module; The water flow control module includes a first chamber and a second chamber. The first and second chambers are connected to the output port of the pre-settling module via flexible input pipes. The first and second chambers are respectively installed in two identical lifting mechanisms. The control module controls the operation of the lifting mechanisms. Two solenoid valves are respectively installed in the flexible input pipes of the first and second chambers. The first water quality monitoring module is installed in the first chamber, and the second water quality monitoring module is installed in the second chamber. The control input terminals of the solenoid valves are connected to the control module. The output terminals of the water body monitoring module and the water quality monitoring module are connected to the control module. The control module communicates with a remote monitoring center via a wireless transmission module. The water monitoring module includes a first velocity sensor for monitoring the flow velocity of the river water and a temperature sensor for monitoring the temperature of the river water. The output terminals of the first velocity sensor and the temperature sensor are connected to the input terminal of the control module. The water monitoring module further includes a second flow velocity sensor for monitoring the water flow velocity in the first chamber and a third flow velocity sensor for monitoring the second chamber. The output terminals of the second flow velocity sensor and the third flow velocity sensor are connected to the input terminal of the control module. The control module adjusts the water flow rate in the first and second detection chambers as follows: S1. Set the optimal flow velocity range of the water in the first chamber [a,b]; where a is the lower limit of the optimal flow velocity range of the water in the first chamber, and b is the upper limit of the optimal flow velocity range of the water in the first chamber. S2. Obtain the flow velocity from the first flow velocity sensor and determine whether the flow velocity output by the first flow velocity sensor is within the optimal flow velocity range. If so, the control module controls the opening of the solenoid valve of the flexible pipe in the first chamber and controls the action of the electric cylinder in the first chamber to adjust the height difference between the output port of the pre-settling module and the first chamber, so that the flow velocity values ​​output by the first flow velocity sensor and the second flow velocity sensor are equal. If not, proceed to step S3. S3. If the flow velocity value output by the first flow velocity sensor is less than a, the control module controls the opening of the solenoid valve of the flexible pipe in the first chamber and controls the action of the electric cylinder in the first chamber to adjust the height difference between the output port of the pre-settling module and the first chamber, so that the flow velocity value output by the second flow velocity sensor is equal to a. If the flow velocity value output by the first flow velocity sensor is greater than b, the control module controls the opening of the solenoid valve of the flexible pipe in the first chamber and controls the action of the electric cylinder in the first chamber to adjust the height difference between the output port of the pre-settling module and the first chamber, so that the flow velocity value output by the second flow velocity sensor is equal to b. S4. The control module obtains the flow velocity from the first flow velocity sensor, then controls the opening of the solenoid valve of the flexible pipe in the second chamber and controls the action of the electric cylinder in the second chamber to adjust the height difference between the output port of the pre-settling module and the second chamber, so that the flow velocity value output by the third flow velocity sensor is equal to the flow velocity value output by the first flow velocity sensor.

2. The online water quality monitoring system for rivers according to claim 1, characterized in that: The lifting mechanism includes a mounting housing, a support plate, and an electric cylinder. Slider blocks are provided on the left and right sides of the support plate. A sliding groove is provided on the inner side wall of the mounting housing. The sliders are conformally embedded in the sliding groove and can reciprocate along the length of the sliding groove. The electric cylinder is located below the support plate, and the power output end of the electric cylinder is fixedly connected to the lower surface of the support plate. The control input end of the electric cylinder is connected to the control output end of the control module.

3. The online water quality monitoring system for rivers according to claim 1, characterized in that: The pre-settling module includes a settling tank and a water pump; The control terminal of the water pump is connected to the control output terminal of the control module. The output port of the water pump is connected to the input port of the settling tank. The output port of the settling tank is connected to the first chamber and the second chamber through a flexible pipe. The bottom inner side of the settling tank is a convex spherical structure. A sewage outlet is provided at the bottom edge of the settling tank, and a sewage discharge electric control valve is provided at the sewage outlet. An electric rotating nozzle is provided at the top of the settling tank, and the control terminal of the electric rotating nozzle is connected to the control module.

4. The online water quality monitoring system for rivers according to claim 1, characterized in that: The second water quality monitoring module includes an ORP sensor, a TOC sensor, and a sulfide sensor.

5. The online water quality monitoring system for rivers according to claim 1, characterized in that: The control module includes a GPS positioning circuit, a microcontroller, and a memory. The GPS positioning circuit is connected to the microcontroller, the microcontroller is connected to the memory, and the microcontroller is connected to the remote monitoring center via a wireless transmission module.

6. The online water quality monitoring system for rivers according to claim 1, characterized in that: The remote monitoring center includes a monitoring server, a storage server, input / output devices, and early warning devices; The monitoring server and the control module are connected via a wireless transmission module. The monitoring server is also connected to the storage server and to input / output devices and early warning devices.

7. The online water quality monitoring system for rivers according to claim 6, characterized in that: The early warning device is an audible and visual alarm.

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