Water quality profiling system with biofouling prevention

Abstract

The application discloses a water quality profile observation system capable of preventing biological adhesion, comprising a central base station and a plurality of water quality monitoring terminals; each monitoring terminal comprises a control module and a reading module; the control module is used for controlling a motor to drive a winch to drive a water quality probe to sense temperature in surface seawater; after the temperature sensing is completed, the control module is used for controlling the motor to drive the winch to drive the water quality probe to descend in the seawater; the control module is also used for controlling the motor to drive the winch to drive the water quality probe to ascend when the target observation depth is reached; the reading module is used for reading water quality data through a cable to form a vertical profile of water quality parameters with depth distribution; and the central base station is used for judging whether the water quality profile is abnormal through a judgment algorithm according to the vertical profile. By adopting the technical scheme, the water quality profile of a target sea area such as a marine ranch can be continuously observed without manual attendance, meanwhile, the adhesion of aquatic organisms such as barnacles in seawater is avoided, the probe is prevented from being invalid due to adhesion, and the maintenance frequency of the whole system is significantly reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of information technology, and in particular relates to a water quality profile observation system for preventing biological attachment. Background Art

[0002] The quality of seawater in marine ranching areas is directly related to the growth, reproduction, and disease resistance of aquaculture organisms. It also directly affects the distribution and growth of aquatic crops and is a key factor in determining the yield and quality of aquatic products. Therefore, real-time monitoring of aquaculture water quality parameters in marine ranching areas is crucial to improving the quality of aquaculture products.

[0003] Currently, the vertical resolution of water quality and environmental parameters captured by monitoring instruments is too low to meet the actual monitoring needs of production. Marine ranching areas typically have a depth of 10-30 meters. Real-time monitoring systems for marine ranching water quality parameters have been implemented in actual marine ranching operations. However, these systems monitor the sea surface or use multiple sensors to monitor water quality parameters at specific depths. This means that continuous, real-time monitoring at a specific depth cannot meet the needs of monitoring water quality parameters across the entire seawater layer. The vertical resolution of these parameters is too low to be effective in practical production.

[0004] More importantly, nearshore waters are characterized by high biomass and abundant zooplankton. Prolonged submersion of monitoring instruments in seawater can lead to the serious problem of aquatic organisms (such as barnacles and tubeworms) attaching to them. This poses a significant risk to real-time monitoring instruments, requiring cleaning of attached organisms after only ten days or so. Failure to clean these attachments can reduce measurement accuracy and even render the instruments inoperable.

[0005] In order to solve the problem of seawater aquatic organism attachment, currently, near-shore water quality monitoring mostly uses special coatings to prevent biological attachment. The problem with this anti-attachment method is that these coatings will pollute farmed seafood, and the instrument probe is immersed in seawater for too long, making biological attachment inevitable. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a water quality profile observation system that prevents biological attachment.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] A water quality profile observation system for preventing biological attachment includes: a central base station and multiple water quality monitoring terminals; each monitoring terminal includes: a control module, a reading module and a data sending module; wherein,

[0009] The control module is used to control the motor to drive the winch to drive the water quality probe to sense temperature in the surface seawater; after the temperature sensing is completed, the motor is controlled to drive the winch to lower the water quality probe in the seawater; and when the target observation depth is reached, the motor is controlled to drive the winch to raise the water quality probe;

[0010] A reading module is used to read water quality data through a cable to form a vertical profile of the water quality parameters with depth;

[0011] A data sending module, used for sending the vertical profile to the central base station;

[0012] The central base station is used to determine whether the water quality profile is abnormal based on the vertical profile through a discrimination algorithm.

[0013] Preferably, the water quality data include: seawater temperature, seawater salinity, pH value, dissolved oxygen, total nitrogen, and chlorophyll a concentration.

[0014] Preferably, the water quality monitoring terminal includes: a chassis shell, a motor, a winch, a solar panel, a battery, a water quality probe, an anti-evaporation one-way water storage tank, a shower hose, and a shower controller; wherein, a solar panel is installed on the top of the monitoring terminal chassis shell; a control module, a reading module and a data sending module, a motor and a battery are installed inside the monitoring terminal chassis shell; a winch is installed on the side of the monitoring terminal chassis; the observation cable is collected in the winch, and the terminal of the observation cable is a water quality probe; after the observation is completed, the water quality probe hovers 0.5 to 2 meters above the water surface; the shower controller controls the fresh water in the anti-evaporation one-way water storage tank to flush the water quality probe through the shower hose.

[0015] As a preference, the central base station uses the mean and standard deviation discrimination algorithm of the data to identify abnormal water quality profiles. The mean and standard deviation are calculated as follows:

[0016] ;

[0017] in, for j The data observed at all times, is the mean value of the observed data, i =1,2,3…, represents the monitored water quality parameters, N is the average amount of data;

[0018] ;

[0019] in, for j The data observed at all times, is the standard deviation of the observed data, i =1,2,3…, represents the monitored water quality parameters, N is the average amount of data;

[0020] Abnormalities in water quality parameters are classified according to the following standards:

[0021] ;

[0022] in, for j +1 moment observation data, abnor is the outlier judgment coefficient;

[0023] if abnor If the value is greater than a certain threshold, the data is judged to be abnormal and a water quality alarm is issued according to the parameter category.

[0024] The control module of the present invention controls the motor-driven winch to drive the water quality probe to sense temperature in the surface seawater; after the temperature sensing is completed, the motor-driven winch drives the water quality probe to descend in the seawater; the reading module reads the water quality data through the cable to form a vertical profile of the water quality parameters distributed with depth; when it reaches the target observation depth, the control module controls the motor-driven winch to drive the water quality probe to rise, and the water quality probe is suspended 0.5 meters to 2 meters above the water surface after it comes out of the water; the flushing device is controlled to flush the water quality probe; the data sending module sends the data back to the central base station; the central base station uses a discrimination algorithm to determine if the water quality profile is abnormal. The technical solution of the present invention is adopted to realize unmanned continuous observation of the water quality profile of target sea areas such as marine ranches. The method of the water quality probe coming out of the water and suspending after the observation is completed can avoid the attachment of aquatic organisms such as barnacles in the seawater, prevent the probe from failing due to adhesion, and significantly reduce the maintenance frequency of the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0026] Figure 1 This is a schematic diagram of the framework of the water quality profile observation system for preventing biofouling according to an embodiment of the present invention;

[0027] Figure 2 Schematic diagram of the structure of the water quality profile observation system for preventing biological attachment according to an embodiment of the present invention. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Example 1:

[0031] like Figure 1 、 2 As shown, an embodiment of the present invention provides a water quality profile observation system for preventing biological attachment, comprising: a central base station and multiple water quality monitoring terminals; the water quality monitoring terminals can observe the vertical profile distribution of water quality in situ and transmit the observation data to the central base station via 4G signals or Beidou communication network, and the central base station executes the discrimination algorithm and determines whether to send an abnormal water quality alarm; each monitoring terminal comprises: a control module, a reading module and a data sending module; wherein,

[0032] The control module is used to control the motor to drive the winch to drive the water quality probe to sense temperature in the surface seawater; after the temperature sensing is completed, the motor is controlled to drive the winch to lower the water quality probe in the seawater; and when the target observation depth is reached, the motor is controlled to drive the winch to raise the water quality probe;

[0033] The reading module is used to read water quality data through the cable to form a vertical profile of the water quality parameters such as seawater temperature, salinity, pH value, dissolved oxygen, total nitrogen, and chlorophyll a concentration with depth;

[0034] A data sending module, used for sending the vertical profile to the central base station;

[0035] The central base station is used to determine whether the water quality profile is abnormal based on the vertical profile through a discrimination algorithm.

[0036] As an implementation method of an embodiment of the present invention, a water quality monitoring terminal includes: a chassis shell, a storage medium, a motor, a winch, a solar panel, a battery, a water quality probe, and a shower device. The shower device includes: an anti-evaporation one-way water storage tank, a shower hose, and a shower controller; wherein a solar panel is installed on the top of the chassis shell of the monitoring terminal; a control module, a reading module, a motor and a battery are installed inside the chassis shell of the monitoring terminal; a winch is installed on the side of the chassis of the monitoring terminal; an observation cable is collected in the winch, and the terminal of the observation cable is a water quality probe; after the observation is completed, the water quality probe hovers above the water surface 0.5 to 2 meters above; the shower controller controls the fresh water in the anti-evaporation one-way water storage tank to flush the water quality probe through the shower hose; wherein, the water quality probe stays below the shower controller in the standby state; the shower controller is controlled by the control module, and after the observation is completed, the fresh water in the shower hose is used to flush the water quality probe; the shower hose is connected to the anti-evaporation one-way water storage tank for collecting rainwater; the top of the water tank is designed with a wide mouth to facilitate the collection of rainfall, and the mouth is an automatically closing one-way valve. When there is collected rainwater at the wide mouth, the one-way valve opens; when there is no rainwater at the wide mouth, the one-way valve closes to prevent the fresh water in the tank from evaporating.

[0037] Furthermore, the solar panel is connected to the battery, the battery is connected to the motor, and the motor is connected to the control module and the winch. The solar panel can convert solar energy into electrical energy and store it in the battery. The capacity of the battery can support the motor to run continuously for 1 hour to meet the needs of conditions such as bad weather and weak sunlight. Under the control of the control module, the motor starts to rotate the winch, and the cable drives the probe up and down to observe the seawater quality.

[0038] A complete observation process of the water quality monitoring terminal is as follows: the control module controls the motor to rotate forward, and then controls the winch to rotate forward, and the winch drives the water quality probe to descend vertically; the reading module reads the water pressure data observed by the water quality probe through the cable. When the water pressure is greater than 0.5dB (0.5 meters), the control module controls the motor to stop for 2 minutes, and performs temperature sensing of the instrument probe to correctly measure the seawater temperature profile; after 2 minutes, the control module controls the motor to rotate forward, and then controls the winch to rotate forward, and the winch drives the water quality probe to descend vertically; the reading module continuously reads the water quality data observed by the water quality probe through the cable , including: seawater temperature, seawater salinity, pH value, dissolved oxygen, total nitrogen, and chlorophyll a concentration; the water quality probe descends to a predetermined depth in the water, the control module controls the motor to reverse, and then controls the winch to reverse, and the winch drives the water quality probe to rise vertically; the reading module reads the pressure data observed by the water quality probe through the cable, and the motor stops when the water quality probe rises to 0.5 to 2 meters above the water surface; the flushing device is controlled to flush the water quality probe; the data sending module sends the observation data to the central base station, and the central base station executes the judgment algorithm and decides whether to send an abnormal water quality alarm.

[0039] Furthermore, the central base station uses the mean and standard deviation of the data to identify abnormal water quality profiles. The mean and standard deviation are calculated as follows:

[0040] ;

[0041] in, for j The data observed at all times, is the mean value of the observed data, i =1,2,3…, represents the monitored water quality parameters, N The average data volume, for example, 100 can be selected.

[0042] ;

[0043] in, for j The data observed at all times, is the standard deviation of the observed data, i =1,2,3…, represents the monitored water quality parameters, N The average data volume, for example, 100 can be selected.

[0044] Abnormalities in water quality parameters are classified according to the following standards:

[0045] ;

[0046] in, for j +1 moment observation data, abnor is the outlier judgment coefficient. If abnor If the value is greater than a certain threshold, the data is judged to be abnormal and a water quality alarm is issued based on the parameter category.

[0047] During the observation process, the observation time interval can be adjusted according to demand to achieve unmanned monitoring of water depth, water temperature, salinity and water quality, providing a continuous data basis for further research. The central base station can judge the changes in hydrological parameters faced in the production process based on the returned data through manual or artificial intelligence judgment, and provide strategic reference for the production process.

[0048] The embodiment of the present invention uses a motor-driven cable winch to drive the water quality probe to rise and fall to obtain seawater quality parameters. After the water quality observation is completed, the water quality probe is suspended on the water surface and rinsed with fresh water to protect the water quality probe, prevent the attachment of aquatic organisms from a physical level, and greatly reduce the operation and maintenance costs of the water quality monitoring instrument.

[0049] The embodiment of the present invention adopts a water quality probe and utilizes the rising and falling measurement method to replace the use of multiple water quality probes at different seawater depths, and monitors water quality parameters such as temperature, salinity, dissolved oxygen, and pH of the entire layer of seawater in the target sea area. This method greatly reduces the cost of use.

[0050] The embodiment of the present invention adopts a water quality probe and utilizes the ascending and descending measurement method to enable the water quality of seawater at all depths to be observed. Compared with deploying multiple water quality probes at different seawater depths, the vertical data resolution of the obtained water quality profile is greatly improved; the vertical resolution of the water quality profile data can be increased to up to 0.1 meters.

[0051] The embodiment of the present invention utilizes the characteristic of seawater containing a large amount of rainwater and uses an anti-evaporation automatically closed one-way valve to collect rainwater. After each water quality profile observation, fresh water flushing is used to ensure the cleanliness of the probe, avoid the retention of residual seawater, and maintain the sensitivity of the probe.

[0052] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by persons skilled in the art should fall within the scope of protection defined by the claims of the present invention.

Claims

1. A water quality profile observation system for preventing biological attachment, characterized in that: It includes: a central base station and multiple water quality monitoring terminals; each water quality monitoring terminal includes: a control module, a reading module and a data sending module; wherein, The control module is used to control the motor to drive the winch to drive the water quality probe to sense temperature in the surface seawater; after the temperature sensing is completed, the motor is controlled to drive the winch to lower the water quality probe in the seawater; and when the target observation depth is reached, the motor is controlled to drive the winch to raise the water quality probe; A reading module is used to read water quality data through a cable to form a vertical profile of the water quality parameters with depth; A data sending module, used for sending the vertical profile to the central base station; The central base station is used to determine whether the water quality profile is abnormal based on the vertical profile through a discrimination algorithm; The central base station uses the mean and standard deviation of the data to identify abnormal water quality profiles. The mean and standard deviation are calculated as follows: Among them, α j is the data observed at time j, m i is the average value of the observed data, i = 1, 2, 3…, represents the monitored water quality parameters, and N is the amount of average data; Among them, α j is the data observed at time j, σ i is the standard deviation of the observed data, i = 1, 2, 3…, represents the monitored water quality parameters, and N is the average amount of data; Abnormalities in water quality parameters are classified according to the following standards: Among them, α j+1 is the data observed at time j+1, αbnor is the outlier judgment coefficient; If αbnor is greater than a certain threshold, the data is judged to be abnormal and a water quality alarm message is issued according to the parameter category; The water quality monitoring terminal also includes: a chassis shell, a motor, a winch, a solar panel, a battery, a water quality probe, an anti-evaporation one-way water storage tank, a shower hose and a shower controller; wherein, the solar panel is installed on the top of the chassis shell; the control module, the reading module and the data sending module, the motor and the battery are installed inside the chassis shell; the winch is installed on the side of the chassis shell; the observation cable is collected in the winch, and the terminal of the observation cable is the water quality probe; after the observation is completed, the water quality probe hovers 0.5 to 2 meters above the water surface; the shower controller controls the fresh water in the anti-evaporation one-way water storage tank to flush the water quality probe through the shower hose.

2. The anti-biofouling water quality profile observation system according to claim 1, characterized in that: Water quality data include: seawater temperature, seawater salinity, pH value, dissolved oxygen, total nitrogen and chlorophyll a concentration.

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