Water quality detection system and water quality detection device

Abstract

The invention discloses a water quality detection system and a water quality detection device. The water quality detection system comprises the water quality detection device, a water leaving air bag connected with the water quality detection device and an inflation module. The water quality detection device comprises a body, a sensing light source, a fluorescent sensing film, a light detector and a signal processor. The sensing light source is arranged in the body and used for emitting sensing light. The fluorescent sensing film is arranged on the surface of the body and used for receiving the sensing light to generate feedback light. The light detector is arranged in the body and used for receiving the feedback light to generate a concentration signal. And the signal processor is arranged in the body, is connected to the light detector and is used for determining the concentration of the component to be detected in the aqueous solution according to the concentration signal. The inflation module is used for inflating or deflating the water-leaving air bag. The water leaving air bag is arranged on the body and used for enabling the fluorescent sensing film to float out of the liquid level during inflation.

Description

Technical Field

[0001] This invention relates to a water quality testing system and a water quality testing device. Background Technology

[0002] In optical water quality sensors, the sensor housing and fluorescent sensing membrane suffer wear and tear due to prolonged immersion in aqueous solutions, necessitating frequent sensor replacement. In particular, barnacles or other microorganisms in seawater or aquaculture waters can easily adhere to the fluorescent sensing membrane, and in some water bodies with poor quality, the membrane may become inaccurate within days. These factors contribute to decreased accuracy and increased maintenance costs for current water quality monitoring devices. Summary of the Invention

[0003] In view of the above, the present invention provides a water quality testing system and a water quality testing device.

[0004] A water quality detection system according to an embodiment of the present invention is used to measure the concentration of a analyte in an aqueous solution. It includes a water quality detection device, a water-free air bladder connected to the water quality detection device, and an inflation module. The water quality detection device includes a main body, a sensing light source, a fluorescent sensing membrane, a photodetector, and a signal processor. The sensing light source is disposed within the main body and is used to emit sensing light. The fluorescent sensing membrane is disposed on the surface of the main body and is used to receive the sensing light and generate feedback light. The photodetector is disposed within the main body and is used to receive the feedback light to generate a concentration signal. The signal processor is disposed within the main body and connected to the photodetector, and is used to determine the concentration of the analyte in the aqueous solution based on the concentration signal. The inflation module is used to inflate or deflate the water-free air bladder. The water-free air bladder is disposed within the main body and is used to cause the fluorescent sensing membrane to float above the liquid surface during inflation.

[0005] A water quality testing device according to an embodiment of the present invention is used to measure the concentration of a analyte in an aqueous solution. It includes a main body, a sensing light source, a fluorescent sensing membrane, a photodetector, a signal detector, and an antibacterial light source. The sensing light source is disposed within the main body and emits sensing light. The fluorescent sensing membrane includes a reactive layer and a light-shielding layer. The reactive layer is disposed on the light-transmitting surface of the main body, and the light-shielding layer is disposed on the reactive layer and is in direct contact with the aqueous solution. The reactive layer receives the sensing light to generate feedback light. The photodetector is disposed within the main body and receives the feedback light to generate a concentration signal. The signal processor is disposed within the main body and connected to the photodetector, and determines the concentration of the analyte in the aqueous solution based on the concentration signal. The antibacterial light source is disposed within the main body and emits antibacterial light onto the side of the light-shielding layer that is in direct contact with the aqueous solution.

[0006] Through the aforementioned structure, the water quality detection system and device disclosed in this case, by placing a water-free airbag on the main body of the water quality detection device, allows the fluorescent sensing membrane to float above the liquid surface during inflation. This reduces the time the fluorescent sensing membrane is continuously immersed in the water, thus preventing the rapid growth of biofilm on the surface of the membrane and the natural wear and tear on the membrane material during immersion. Furthermore, the inclusion of an antibacterial light source emits antibacterial light onto the side of the fluorescent sensing membrane in contact with the water, inhibiting the attachment of barnacles or other microorganisms in the water and preventing measurement inaccuracies in the fluorescent sensing membrane. Therefore, the water quality detection device of this case can effectively extend the sensor's maintenance cycle, reduce maintenance costs, and improve the sensor's lifespan.

[0007] The foregoing description of the invention and the following description of the embodiments are intended to demonstrate and explain the spirit and principles of the invention, and to provide a further explanation of the scope of the patent application. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of a water quality detection system according to an embodiment of the present invention;

[0009] Figure 2 This is another schematic diagram illustrating a water quality detection system according to an embodiment of the present invention;

[0010] Figure 3 This is a schematic diagram illustrating a water quality detection system in a sensing state according to another embodiment of the present invention;

[0011] Figure 4 This is a schematic diagram of a water quality detection system according to another embodiment of the present invention;

[0012] Figure 5 This is a schematic diagram of a water quality detection system according to another embodiment of the present invention;

[0013] Figure 6 This is a schematic diagram of a water quality testing device according to an embodiment of the present invention;

[0014] Figure 7 for Figure 6 Another schematic diagram of the water quality testing device illustrated in the embodiment;

[0015] Figure 8 for Figure 6 A schematic diagram of the antibacterial light source of the water quality testing device illustrated in the embodiment;

[0016] Figure 9 This is a flowchart illustrating a control method for a water quality detection system according to an embodiment of the present invention;

[0017] Figure 10 This is a flowchart illustrating a control method for a water quality detection system according to another embodiment of the present invention;

[0018] Figure 11 for Figure 10 A schematic diagram of the dissolved oxygen concentration changes recorded by the control method of the water quality detection system in this embodiment;

[0019] Figure 12 for Figure 6 The examples illustrate a comparison chart showing the intelligent control of the antibacterial light intensity of the antibacterial light source based on the concentration of the component to be measured.

[0020] Symbol Explanation

[0021] 1: Water quality testing system

[0022] 10,10': Water quality testing device

[0023] 101:Ontology

[0024] 1011: Transparent substrate

[0025] 102: Sensing Light Source

[0026] 103: Fluorescence sensing film

[0027] 1031: Reaction Layer

[0028] 1032: Reflective layer

[0029] 1033: Light-shielding layer

[0030] 104: Light Detector

[0031] 105: Signal Processor

[0032] 106: Hollow cover

[0033] 1061: Opening

[0034] 107: Antibacterial Light Source

[0035] 1071: Encapsulation housing

[0036] 1072: First light-emitting element

[0037] 1073: Second light-emitting element

[0038] 1074: Photoelectric sensing element

[0039] 1075: Electrode contacts

[0040] 1076: Circuit Layer

[0041] 11,11': Water-free airbag

[0042] 12: Inflatable module

[0043] 13: Floating Platform

[0044] 14:Floating body

[0045] 15: Cleaning equipment

[0046] 151: Cleaning Module

[0047] 152: Nozzle

[0048] L: Liquid level

[0049] A1, A2, A3: Interval

[0050] C1, C2: Data

[0051] S1-S6, S21-S25: ​​Steps Detailed Implementation

[0052] The following detailed description of the features and advantages of the present invention in the embodiments is sufficient to enable anyone skilled in the art to understand the technical content of the present invention and implement it accordingly. Based on the disclosure, claims, and drawings in this specification, anyone skilled in the art can easily understand the related objectives and advantages of the present invention. The following embodiments are intended to further illustrate the points of the present invention, but are not intended to limit the scope of the present invention in any way.

[0053] Please refer to the reference. Figures 1 to 2 , Figure 1 This is a schematic diagram of a water quality testing system according to an embodiment of the present invention. Figure 2 This is another schematic diagram of a water quality detection system according to an embodiment of the present invention. Figures 1 to 2 As shown, a water quality detection system 1 for measuring the concentration of a analyte in an aqueous solution includes a water quality detection device 10, a water-detaching airbag 11 connected to the water quality detection device 10, and an inflation module 12. The water quality detection device 10 includes a body 101, a sensing light source 102, a fluorescent sensing membrane 103, a photodetector 104, and a signal processor 105. The sensing light source 102 is disposed within the body 101 and emits sensing light. The fluorescent sensing membrane 103 is disposed on the surface of the body 101 and receives the sensing light to generate feedback light. The photodetector 104 is disposed within the body 101 and receives the feedback light to generate a concentration signal. The signal processor 105 is disposed within the body 101 and electrically connected to the photodetector 104, and determines the concentration of the analyte in the aqueous solution based on the concentration signal. The water-detaching airbag 11 is disposed within the body 101 and, during inflation, causes the fluorescent sensing membrane 103 to float above the liquid surface L. The inflation module 12 is used to inflate or deflate the water-free airbag 11.

[0054] In this example, the body 101 may have a cavity and a light-transmitting surface. For example, the light-transmitting surface may be located on a light-transmitting substrate 1011 (e.g., a plastic or glass substrate). The body 101 in this example has a rod-shaped structure, but this is not limited to this; that is, the body 101 may also have other arbitrary shapes and structures. The sensing light source 102 may include a reference light source and an excitation light source, wherein the wavelength of the excitation light source can excite the fluorescent sensing film 103, causing the fluorescent sensing film 103 to emit feedback light (fluorescence). Based on the principle of fluorescence quenching, the intensity or phase of the excitation light detected by the photodetector will change due to the variation in the concentration to be measured. The wavelength of the reference light source will not produce a fluorescence reaction with the fluorescent sensing film 103, so the intensity or phase of the excitation light detected by the photodetector will not change due to the variation in the concentration to be measured. Based on the difference in the light intensity or phase signals, the concentration of the aqueous solution can be calculated. For example, the reference light source may be a red light-emitting diode, and the excitation light source may be a blue light-emitting diode. A fluorescence sensing film 103 can be disposed on the surface of a light-transmitting substrate 1011, and one side of the fluorescence sensing film 103 can be directly contacted with the aqueous solution to react with the analyte in the aqueous solution. When the fluorescence sensing film 103 is excited by the aforementioned excitation light, it can emit feedback light (fluorescence), and the feedback light can be detected by a photodetector 104. Furthermore, when the fluorescence sensing film 103 reacts with the analyte, the fluorescence intensity and phase signal emitted by it will change. Taking the sensing of dissolved oxygen concentration in an aqueous solution as an example, based on the principle of fluorescence quenching, from the time the excitation light source is driven to emit light, to the time it is incident on the fluorescence film to generate fluorescence, and then back to the photodetector, the phase or intensity will be proportional to the dissolved oxygen concentration in the water. However, the phase or intensity of the reference light source in the same process will not be related to the concentration. Therefore, the concentration of dissolved oxygen in the aqueous solution can be obtained by the phase difference or intensity difference between the excitation light and the reference light.

[0055] The photodetector 104 can receive the feedback light and generate a corresponding concentration signal. The photodetector 104 can be, for example, a photodiode, but is not limited thereto. When the signal processor 105 receives the concentration signal from the photodetector 104, it can determine the concentration of a analyte in the aqueous solution based on the intensity of the concentration signal. Specifically, the signal processor 105 may include one or more processing / control units with data receiving, recording, processing, storage, and output functions. These processing / control units may be, for example, a microcontroller, a central processing unit, a graphics processor, a programmable logic controller, or any combination thereof. With this configuration, when the concentration of the analyte in the aqueous solution changes, the phase or intensity of the feedback light (fluorescence) changes, and the phase or intensity of the concentration signal also changes, allowing the signal processor 105 to determine the change in the concentration of the analyte in the aqueous solution.

[0056] A water-detaching airbag 11 is disposed on the main body 101, and when inflated, it causes the fluorescent sensing membrane 103 to float above the liquid surface L. For example, the water-detaching airbag 11 can have a first state and a second state depending on the amount of inflation inside; the first state can be the state where the water-detaching airbag 11 is fully inflated, and the second state can be the state where the water-detaching airbag 11 is fully deflated. There may be various embodiments regarding the arrangement of the water-detaching airbag 11. Figure 1 In one embodiment, the water-removing airbag 11 can be positioned on the side of the main body 101 near the fluorescent sensing membrane 103. Thus, when the water-removing airbag 11 is not inflated (in the second state), the fluorescent sensing membrane 103 can be submerged in the liquid surface L to measure the concentration of the analyte in the aqueous solution; when the water-removing airbag 11 is inflated (in the first state), the fluorescent sensing membrane 103 can float above the liquid surface L. Furthermore, the water-removing airbag 11 can be positioned between the center of gravity of the water quality detection device 10 and the fluorescent sensing membrane 103, such that when the water-removing airbag 11 is inflated, the heavier side of the water quality detection device 10 (the side where the center of gravity is located) remains below the liquid surface L, while the lighter side (the side where the fluorescent sensing membrane 103 is located) floats above the liquid surface L. Specifically, the center of gravity can refer to the common center of gravity of all components included in the water quality detection device 10. It should be noted that this application is not limited to the aforementioned example of the configuration of the water-free airbag 11. Any configuration of the water-free airbag 11 that allows the fluorescent sensing membrane 103 to float above the liquid surface L during inflation falls within the scope of this application. In practice, the configuration of the water-free airbag 11 can be adjusted according to the shape, structure, or counterweight of the main body 101 to achieve the same or similar effects.

[0057] The inflation module 12 can be installed on a floating platform 13 offshore or floating on the liquid surface L, and connected to the water-leaving airbag 11 via a gas pipeline to inflate or deflate the water-leaving airbag 11. Specifically, the inflation module 12 may include an inflation pump and / or a controller, and control the inflation or deflation of the water-leaving airbag 11 according to a judgment criterion or the measurement results of the water quality detection device 10. For example, the inflation module 12 may control the inflation or deflation of the water-leaving airbag 11 according to a water-leaving cycle. Alternatively, the signal processor 105 may generate a sensing command to drive the inflation module 12 to deflate the water-leaving airbag 11, causing the fluorescent sensing membrane 103 to sink into the liquid surface L; and the signal processor 105 may also generate a water-leaving command to drive the inflation module 12 to inflate the water-leaving airbag, causing the fluorescent sensing membrane 103 to float out of the liquid surface L. Furthermore, the inflation module 12 can adjust the length of the water separation cycle based on the concentration of the component to be tested measured by the water quality testing device 10 through its own controller (e.g., an inflation pump control circuit), achieving a flexible control effect. For example, the inflation pump control circuit can be connected to the signal processor 105 to obtain the concentration of the component to be tested measured by the water quality testing device 10, and determine whether to inflate or deflate the water separation airbag 11 based on the concentration of the component to be tested.

[0058] Please refer to Figure 1 In this example, the water quality testing system 1 may optionally include a floating platform 13. The floating platform 13 may be equipped with a power supply module and connected to the water quality testing device 10 via a cable for power supply. Alternatively, the water quality testing device 10 may be equipped with its own battery or further connected to a solar panel for power generation; this is not a limitation in this case. Furthermore, the water quality testing device 10 may optionally include a hollow cover 106. In this example, the hollow cover 106 is disposed on the body 101, corresponding to the fluorescence sensing membrane 103, and forms an open space between itself and the fluorescence sensing membrane 103 through at least one opening to allow the aqueous solution to flow. In summary, in this example, when the water-detaching airbag 11 is inflated and in the first state, the fluorescent sensing membrane 103 of the water quality detection device 10 floats above the liquid surface L; when the water-detaching airbag 11 is deflated and in the second state, the fluorescent sensing membrane 103 of the water quality detection device 10 sinks into the liquid surface L and is pulled to a given depth below the liquid surface L by the airflow pipe between the water-detaching airbag 11 and the inflation module 12 or the cable between the floating platform 13 and the water quality detection device 10. This avoids the fluorescent sensing membrane 103 from being submerged in the water for extended periods, thus preventing bacterial growth and effectively extending the product's lifespan.

[0059] Furthermore, the air bladder 11, depending on its internal inflation level, can have not only a first state of full inflation (100% inflation) and a second state of full deflation (0% inflation), but also several intermediate states. In this example, the inflation module 12 can also adjust the balance between the buoyancy of the air bladder 11 and the weight of the sensor body by controlling the inflation level of the air bladder 11 from 0% to 100%, allowing the fluorescent sensing membrane to hover at different specific depths below the liquid surface L to meet the needs of detecting different aquaculture species (e.g., fish and shrimp inhabiting different depths); it can also measure the dissolved oxygen value at different depths by inflating and deflating the air bladder, establishing a 2D numerical map of dissolved oxygen concentration changes in the vertical direction of the water surface to understand the distribution of dissolved oxygen in the water. In addition, if there is horizontal water flow interference during the hovering process, the current hovering depth can be confirmed by a gravity sensing chip, such as a three-axis gyroscope or a three-axis accelerometer, and then the inflation and deflation levels can be adjusted to achieve hovering at a specific depth in the water.

[0060] The water-detaching airbag and inflation module of this invention are combined with a water quality testing device for detecting dissolved oxygen concentration. However, they can also be combined with other testing devices, such as a device for detecting pH value. Therefore, the water quality testing device is not limited to detecting dissolved oxygen concentration. Furthermore, the water-detaching airbag and inflation module of this invention can also be combined with multiple testing devices with different functions simultaneously, such as a combination of devices for detecting dissolved oxygen concentration and pH value, to simultaneously drive multiple testing devices to float to the surface.

[0061] Please combine Figure 1 refer to Figure 3 , Figure 3 This is a schematic diagram of a water quality detection system in a sensing state, according to another embodiment of the present invention. (Comparison) Figure 1 In this embodiment, the water quality detection system may further include a float 14. Compared to the water-removing airbag 11 located on the side of the body 101 near the fluorescent sensing membrane 103, the float 14 can be located on the other side of the body 101 away from the fluorescent sensing membrane 103. The float 14 can provide a fixed buoyancy greater than the overall weight of the water quality detection device. For example, the float 14 can be implemented using a sealed hollow tube made of plastic material or a low-density solid object (such as EVA foam), and its shape can be, but is not limited to, circular, square, or centrally perforated. With this configuration, the end of the body 101 with the float 14 can continuously float on the liquid surface L, and when the water-removing airbag 11 is inflated, the fluorescent sensing membrane 103 can float above the liquid surface L, while the sensor body 101 can also completely leave the water surface, thus reducing the risk of corrosion caused by prolonged immersion (e.g., in seawater).

[0062] The water-detaching airbag, inflation module, and float of the present invention are combined with a water quality testing device for detecting dissolved oxygen concentration. However, they can also be combined with other testing devices with different functions, such as a device for detecting pH value. Therefore, the water quality testing device is not limited to detecting dissolved oxygen concentration. Furthermore, the water-detaching airbag, inflation module, and float of the present invention can also be combined with multiple testing devices with different functions simultaneously, such as a combination of devices for detecting dissolved oxygen concentration and pH value, to achieve the goal of driving multiple testing devices to float to the surface.

[0063] According to another embodiment of the present invention, the float 14 can also be another airbag that is inflated and deflated by the inflation module 12. When it is inflated and the water-removing airbag 11 is deflated, the fluorescent sensing membrane 103 can sink into the liquid surface L, thus enabling the water quality detection device to enter the sensing state; when the float 14 is deflated and the water-removing airbag 11 is inflated, the fluorescent sensing membrane 103 can float out of the liquid surface L. In another embodiment, the float 14 and the water-removing airbag 11 are inflated simultaneously, and the fluorescent sensing membrane 103 can also float out of the liquid surface L. In comparison, the main difference between the state in which the float 14 and the water-removing airbag 11 are inflated simultaneously and the state in which the float 14 is deflated and the water-removing airbag 11 is inflated is that the sensor body 101 can be completely removed from the water surface, thereby reducing the corrosion of the body 101 caused by prolonged immersion (e.g., seawater).

[0064] Please refer to Figure 4 , Figure 4 This is a schematic diagram of a water quality detection system according to another embodiment of the present invention. In this example, elements that are the same as in the previous embodiments, such as the body 101, the fluorescence sensing membrane 103, and the hollow cover 106 (including at least one opening 1061), will be omitted from repeated description. Figure 4 (And some of the accompanying figures) may appropriately omit the depiction of certain components (e.g., the inflation module) without hindering understanding, in order to make the description and illustrations more concise. In this example, the water-removing airbag 11 extends from one side of the body 101 to the other. In this example, when the water-removing airbag 11 is inflated (in the first state), the body 101, together with the fluorescent sensing membrane 103, can float above the liquid surface L; when the water-removing airbag is deflated (in the second state), the body 101, together with the fluorescent sensing membrane 103, can sink below the liquid surface L.

[0065] Please refer to Figure 5 , Figure 5 This is a schematic diagram of a water quality detection system according to another embodiment of the present invention. In this example, elements that are the same as in the previous embodiments, such as the body 101, the fluorescence sensing membrane 103, and the aeration module 12, will be omitted from repeated description. Figure 5 As shown, the water quality detection system in this example may further include a cleaning device 15, disposed on the hollow cover 106 and corresponding to the fluorescent sensing membrane 103, for cleaning the fluorescent sensing membrane 103 after it floats out of the liquid surface L. Specifically, the cleaning device 15 may include a cleaning module 151 and a nozzle 152, wherein the cleaning module 151 is connected to the nozzle 152 through a pipe and uses water flow or air flow to clean the fluorescent sensing membrane 103. With this cleaning device 15, when the water-free airbag 11 is inflated and the fluorescent sensing membrane 103 floats out of the liquid surface L, foreign matter on the surface of the fluorescent sensing membrane 103 can be cleaned with water flow or air flow, thereby effectively extending the maintenance cycle of the fluorescent sensing membrane 103. It should be noted that the cleaning module 151 may have a signal connection with the inflation module 12, so that the cleaning module 151 can start the cleaning operation after determining that the water-free airbag 11 has inflated and the fluorescent sensing membrane 103 has floated out of the liquid surface L.

[0066] Please refer to Figure 6 and Figure 7 , Figure 6 This is a schematic diagram of a water quality testing device according to an embodiment of the present invention. Figure 7 It is based on Figure 6 Another schematic diagram of the water quality testing device illustrated in the embodiment. (See diagram below.) Figure 6As shown, a water quality detection device 10' for measuring the concentration of a analyte in an aqueous solution includes a body 101, a sensing light source 102, a fluorescent sensing film 103, a photodetector 104, a signal processor 105, and an antibacterial light source 107. The sensing light source 102 is disposed within the body 101 and emits sensing light. The fluorescent sensing film 103 includes a reaction layer 1031 and a light-shielding layer 1033. The reaction layer 1031 is disposed on the light-transmitting surface of the light-transmitting substrate 1011 of the body 101, and the light-shielding layer 1033 is disposed on the reaction layer 1031 and is in direct contact with the aqueous solution. The reaction layer 1031 receives the sensing light to generate a feedback light. The photodetector 104 is disposed within the body 101 and receives the feedback light to generate a concentration signal. The signal processor 105 is disposed within the body 101 and connected to the photodetector 104, and determines the concentration of the analyte in the aqueous solution based on the concentration signal. An antibacterial light source 107 is disposed on the body and is used to emit an antibacterial light to the side of the light-shielding layer 1033 that is in direct contact with the aqueous solution.

[0067] and Figures 1 to 5 Compared to the previous embodiments, the water quality detection system in this example may not include a water-free airbag or an inflation module, but may additionally include an antibacterial light source 107, or may simultaneously include a water-free airbag, an inflation module, and an antibacterial light source 107; this is not limited. Components identical to those in the previous embodiments, such as the body 101, the sensing light source 102, and the photodetector 104, will be omitted from repeated descriptions. Figure 7 As shown, in this example, the fluorescence sensing film 103 can be a three-layer structure, specifically including a reactive layer 1031, a reflective layer 1032, and a light-shielding layer 1033. Taking dissolved oxygen detection in water as an example, the reactive layer 1031 is used to generate fluorescence and can react with oxygen; the reflective layer 1032 is used to reflect light and allows oxygen molecules to permeate; the light-shielding layer 1033 is used to block light from outside the body 101 (e.g., the antibacterial light of the antibacterial light source 107) and allows oxygen molecules to permeate. Through this stacked structure, the antibacterial light of the antibacterial light source 107 can illuminate the side of the light-shielding layer 1033 that is in direct contact with the aqueous solution, reducing the growth of bacteria, microorganisms, and barnacles, while not interfering with the measurement operation of the photodetector 104 located inside the body 101.

[0068] The water quality testing device 10' may optionally include a hollow cover 106. The hollow cover 106 is disposed on the body 101, corresponding to the fluorescence sensing membrane 103, and forms an open space between it and the fluorescence sensing membrane 103 to allow the aqueous solution to flow. An antibacterial light source 107 is disposed on the hollow cover 106. Figure 6As shown, the hollow cover 106 may have multiple openings 1061 to form an open space between itself and the fluorescence sensing membrane 103. In this example, the antibacterial light source 107 can be disposed on the body 101 through the hollow cover 106; however, in other embodiments, the antibacterial light source 107 may also be disposed inside or outside the body 101, and this invention is not limited thereto. For example, the antibacterial light source 107 may be disposed inside the body 101, and through a special optical path design, the antibacterial light may be directed outside the body to inhibit bacteria on the side of the fluorescence sensing membrane 103 that is in contact with the aqueous solution, thereby reducing the growth of bacteria, microorganisms, and barnacles. Specifically, the antibacterial light source 107 may include a light-emitting diode with a specific wavelength.

[0069] Please combine Figure 6 , Figure 7 refer to Figure 8 , Figure 8 It is based on Figure 6 A schematic diagram of the antibacterial light source in the water quality testing device illustrated in the embodiment. As an example, the antibacterial light source 107 can be a semiconductor device with a TO-39 package architecture, or it can be other package architectures, such as surface mount devices (SMD). Figure 8 As shown, the antibacterial light source 107 may include a package housing 1071, a first light-emitting element 1072, a second light-emitting element 1073, a photoelectric sensing element 1074, multiple electrode contacts 1075, and a circuit layer 1076. In this example, the antibacterial light source 107 may emit antibacterial light of blue or ultraviolet wavelengths. For example, the first light-emitting element 1072 may be a blue light-emitting diode with a center wavelength of 410 nanometers, and the second light-emitting element 1073 may be an ultraviolet light-emitting diode with a center wavelength of 265 nanometers. By selecting antibacterial light sources 107 with blue and ultraviolet wavelengths, specific bacteria and aquatic organisms can be inhibited. For example, blue light with a wavelength of 410 nanometers can inhibit the attachment and growth of aquatic organisms (such as barnacles), and ultraviolet light with a wavelength of 265 nanometers can inhibit the attachment and growth of bacteria (biofilm). The photoelectric sensing element 1074, for example, is a photodiode, used to sense the lateral light emitted by the first light-emitting element 1072 and the second light-emitting element 1073, thereby monitoring the intensity of the antibacterial light. Furthermore, a feedback circuit can be used to control the driving current of the two light-emitting elements to achieve stable control of the antibacterial light intensity. In addition, changes in the driving current can be used to estimate the current degradation status and lifespan of the antibacterial light source. It should be noted that, for the active biological species in the environment, those skilled in the art can use light-emitting elements of any wavelength in combination as the antibacterial light source of this invention. For example, the wavelength of the antibacterial light source is between 250 and 285 nanometers; this invention is not limited to this.

[0070] The water quality testing devices described above can be combined to produce an additive effect. The operation of the water quality testing devices in each embodiment will be further explained below. Please refer to... Figure 9 , Figure 9 This is a flowchart illustrating a control method for a water quality detection system according to an embodiment of the present invention. Figure 9 As shown, the water quality testing system can execute the following process to continuously measure the concentration of the analyte in an aqueous solution, including step S1: obtaining the concentration of the analyte in the aqueous solution; step S2: determining the length of the water separation cycle based on the concentration of the analyte; step S3: inflating the water separation airbag according to the water separation cycle; step S4: obtaining the concentration of the analyte in the air; step S5: performing self-calibration using the concentration of the analyte in the air as a standard value; and step S6: deflating the water separation airbag, and then returning to step S1. In this example, steps S2, S4, and S5 are selective. For example, in step S3, the signal processor can control the inflation module to inflate the water separation airbag according to a fixed water separation cycle, thus entering a first state. In step S6, the signal processor can control the inflation module to deflate the water separation airbag after the set water separation cycle length is met, thus entering a second state, to complete a water separation-sinking cycle operation. Additionally, as... Figure 3 As shown in the embodiment, the signal processor can also control the inflation module to switch between inflating or deflating the water-leaving airbag and the float according to the water-leaving cycle. That is, when the inflation module deflates the water-leaving airbag, it can simultaneously inflate the float. This water-leaving scheme can reduce the time that the fluorescent sensing membrane and the body are submerged in the liquid, effectively extending the sensor's maintenance cycle, reducing maintenance costs, and improving the sensor's service life.

[0071] The intelligent water separation control scheme for step S2 is described below. Please refer to the reference. Figure 1 , Figure 2 In this example, the signal processor 105 can be connected to the inflation module 12, and the signal processor 105 can be further used to determine an out-of-water cycle based on the concentration of the component to be measured, and control the inflation module 12 to inflate or deflate the out-of-water airbag 11 according to the out-of-water cycle. As mentioned above, the inflation module 12 can be set on the shore or on a floating platform, and the signal processor 105 and the inflation module 12 can establish a signal connection through a specific cable or wireless transmission method to realize signal communication between the upper and lower parts of the water surface. In step S2, the signal processor 105 can determine the length of the out-of-water cycle based on the concentration of the component to be measured. Specifically, the higher the concentration of the component to be measured, the longer the length of the out-of-water cycle can be. Please refer to... Figure 10 , Figure 10 This is a flowchart illustrating a control method for a water quality detection system according to another embodiment of the present invention. Figure 10As shown, for example, step S2 above may include step S21: determining whether the concentration of the component to be measured deviates from the normal range; if the determination result of step S21 is no, then step S22 is executed: setting the time length of the water separation cycle to a first time length; if the determination result of step S21 is yes, then step S23 is executed: determining the degree of deviation of the concentration of the component to be measured; when the determination result of step S23 corresponds to the degree of deviation reaching a first preset value, then step S24 is executed: setting the time length of the water separation cycle to a second time length; when the determination result of step S23 corresponds to the degree of deviation reaching a second preset value, then step S25 is executed: setting the time length of the water separation cycle to zero (no water separation); and after steps S22, S24, and S25, the following is executed: Figure 9 Step S3 is shown. The second preset value is greater than the first preset value, and the first time length is greater than the second time length. Furthermore, the above-mentioned normal range can be pre-entered into the system or summarized based on historical measurement data.

[0072] Taking dissolved oxygen detection as an example, in steps S21 and S22, when the dissolved oxygen concentration obtained by the signal processor does not deviate from the normal dissolved oxygen concentration range by more than 20%, the signal processor can set the length of the water-removal cycle to a relatively long first time length (e.g., 60 minutes), so that the fluorescent sensing membrane only needs to be submerged in the liquid surface once every 60 minutes, with each submersion time being 5-10 minutes (depending on the time it takes for the sensing signal to reach stability), for periodic measurement. In steps S23 and S24, when the dissolved oxygen concentration obtained by the signal processor deviates from the normal dissolved oxygen concentration range by more than 20%, the signal processor can set the length of the water-removal cycle to a relatively short second time length (e.g., 30 minutes), so that the fluorescent sensing membrane only needs to be submerged in the liquid surface once every 30 minutes, for periodic measurement. In steps S23 and S25, when the dissolved oxygen concentration obtained by the signal processor deviates from the normal dissolved oxygen concentration range by more than 40%, the signal processor can set the length of the water-removal cycle to zero, so that the fluorescent sensing membrane is submerged in the liquid surface without leaving the water, for continuous measurement. Understandably, the criteria for judging the degree of deviation in component concentration can be defined in more ranges, and different water removal cycles can be selected for each range.

[0073] Please refer to further information. Figure 11 , Figure 11 Provided by Figure 10 The control method of the water quality detection device in the embodiment records the changes in dissolved oxygen concentration. For example... Figure 11As shown, taking dissolved oxygen detection as an example, let's first explain the so-called normal range of dissolved oxygen concentration in water. There are two ways to determine this. The first is based on past measurement experience. For example, in aquaculture environments, due to differences in time of day, the empirical values ​​for photosynthesis and oxygen consumption vary under different aquaculture conditions. For instance, a concentration >8 ppm at noon is considered normal, while a concentration >4 ppm in the early morning is within the normal range. Alternatively, one can directly judge based on the absolute value of dissolved oxygen concentration, such as a concentration >8 ppm being within the normal range and a concentration <4 ppm being within the danger range. We will use the first method of judging dissolved oxygen concentration based on empirical values. If the normal dissolved oxygen concentration for this period is 8 ppm, in interval A1, the measured dissolved oxygen concentration is around 8 ppm, which is within the normal range of 10%. In this case, the longest water separation cycle (e.g., 60 minutes / time) can be used for measurement, i.e., Δt1 is 60 minutes. In interval A2, the measured dissolved oxygen concentration drops to around 7 ppm, which has deviated from the normal range of 10%. In this case, a shorter water separation cycle (e.g., 40 minutes / time) can be used for measurement, i.e., Δt2 is 40 minutes. In interval A3, the measured dissolved oxygen concentration drops to around 5-6 ppm, which has deviated from the normal range of 20%. In this case, an even shorter water separation cycle (e.g., 20 minutes / time) can be used for measurement, i.e., Δt3 is 20 minutes. In interval A4, the measured dissolved oxygen concentration drops to below 5 ppm, which has deviated from the normal range of more than 40%. In this case, the water separation cycle can be set to zero to continuously measure the aqueous solution without leaving the water. Another method for determining dissolved oxygen concentration is to use the absolute value of dissolved oxygen concentration. If the absolute value of dissolved oxygen concentration is more than twice the safe value (assuming 4 ppm), for example, >8 ppm, then the time to remove from water is set to T1 (for example, 60 minutes); if the absolute value of dissolved oxygen concentration is between 1 and 2 times the safe value, for example, 4 to 8 ppm, then the time to remove from water is T2 (for example, 30 minutes); if the absolute value of dissolved oxygen concentration is less than the safe value, for example, <4 ppm, then it is not removed from water.

[0074] The above-mentioned intelligent water separation scheme can reduce the time the fluorescent sensing membrane is submerged in the liquid when the water quality is relatively stable, thereby effectively extending the sensor's maintenance cycle, reducing maintenance costs, and increasing the sensor's service life. Furthermore, when the water quality is poor, the time the fluorescent sensing membrane is submerged in the liquid can be increased (or even kept submerged), in order to monitor changes in water quality data in detail.

[0075] The following describes the self-calibration control scheme for steps S4 and S5. When the water-removing airbag inflates (in the first state) and causes the fluorescent sensing membrane to float above the liquid surface, the signal processor can obtain the concentration of the component to be measured in the air and use this concentration as a standard value for self-calibration. Taking dissolved oxygen sensing as an example, the signal processor can use the oxygen concentration in the air as a reference for self-calibration. Specifically, as mentioned above, the signal processor determines the dissolved oxygen concentration based on the concentration signal measured by the photodetector. Therefore, when the fluorescent sensing membrane is exposed to air, the signal processor can determine the oxygen concentration in the air based on the concentration signal measured by the photodetector and use it as a reference value (dissolved oxygen concentration is 100%). Subsequently, when the fluorescent sensing membrane sinks below the liquid surface, the signal processor can re-determine the dissolved oxygen concentration in the aqueous solution based on the updated dissolved oxygen concentration reference value.

[0076] exist Figure 6 In this embodiment, the antibacterial light source 107 can emit antibacterial light and determine its intensity through control executed by the processor of its own control circuit. Alternatively, the antibacterial light source 107 can be connected to the signal processor 105, and the signal processor 105 can be further used to control the intensity of the antibacterial light of the antibacterial light source 107 according to the concentration of the component to be measured. For example, the antibacterial light source 107 may include a light emission control unit, and the signal processor 105 and the antibacterial light source 107 can be electrically connected via a specific cable, wherein this cable can pass through the internal channels of the body 101 to electrically connect the signal processor 105 and the antibacterial light source 107. Please refer to... Figure 12 , Figure 12 It is based on Figure 6 The examples illustrate a comparative chart showing the intelligent control of the antibacterial light intensity of the antibacterial light source based on the concentration of the component to be measured. (See attached chart.) Figure 12 As shown, during the time interval from 0 to T1, the concentration deviation of the analyte in data C1 reaches -50%, at which point the signal processor can control the antibacterial light source to increase the intensity of the antibacterial light. During the same time interval, the concentration deviation of the analyte in data C2 only reaches -5%, at which point the signal processor can control the antibacterial light source to decrease the intensity of the antibacterial light. By intelligently controlling the intensity of the antibacterial light through the control of the antibacterial light source, the irradiation of the antibacterial light can be strengthened when the measurement signal deviation is large, increasing the antibacterial effect and maintaining measurement accuracy; and the irradiation of the antibacterial light can be weakened when the measurement signal deviation is small, saving system energy and extending the lifespan of the antibacterial light source. It should be noted that although this example describes the signal processor 105 controlling the intensity of the antibacterial light from the antibacterial light source 107, in practice, the antibacterial light source 107 can have its own light-emitting control unit and adjust the intensity of the antibacterial light through its own light-emitting control unit; this is not a limitation in this case.

[0077] Through the aforementioned structure, the water quality detection system and device disclosed in this case, by placing a water-detached airbag on the main body of the water quality detection device, allows the fluorescent sensing membrane to float above the liquid surface during inflation, reducing the time the fluorescent sensing membrane is continuously immersed in the water and thus preventing rapid wear and tear. On the other hand, by setting an antibacterial light source, antibacterial light can be emitted towards the side of the fluorescent sensing membrane in contact with the water, inhibiting the attachment of barnacles or other microorganisms in the water and preventing measurement inaccuracies caused by the fluorescent sensing membrane. Therefore, the water quality detection device of this case can effectively extend the sensor's maintenance cycle, reduce maintenance costs, and improve the sensor's lifespan. Furthermore, by intelligently controlling the water-detachment cycle, the time the fluorescent sensing membrane is submerged in the liquid can be reduced when water quality is relatively stable, thus reducing maintenance costs; and when water quality is poor, the time the fluorescent sensing membrane is submerged in the liquid can be increased (or even kept submerged) to monitor changes in water quality data in detail. By using a scheme to intelligently control the intensity of antibacterial light, the irradiation of antibacterial light can be strengthened when the measurement signal deviation is large in order to maintain measurement accuracy; and the irradiation of antibacterial light can be weakened when the measurement signal deviation is small in order to extend the life of the antibacterial light source.

Claims

1. A water quality testing system for measuring the concentration of a analyte in an aqueous solution, comprising a water quality testing device, a water-free air bladder connected to the water quality testing device, and an inflation module, wherein the water quality testing device comprises: ontology; A sensing light source is disposed within the body and is used to emit sensing light; A fluorescent sensing film is disposed on the surface of the body to receive the sensing light and generate feedback light; A photodetector, disposed within the body, is used to receive the feedback light to generate a concentration signal; and A signal processor, disposed within the main body and connected to the photodetector, is configured to calculate the concentration of the analyte in the aqueous solution based on the concentration signal. The inflation module is used to inflate or deflate the water-free airbag, which is disposed on the body and is used to make the fluorescent sensing membrane float out of the liquid surface when inflated.

2. The water quality detection system as claimed in claim 1, wherein the water-free airbag is disposed on the side of the body near the fluorescent sensing membrane.

3. The water quality detection system as claimed in claim 1, wherein the water-free airbag is disposed between the center of gravity of the water quality detection device and the fluorescence sensing membrane.

4. The water quality detection system of claim 1, wherein the water-free airbag extends from one side of the body to the other side.

5. The water quality detection system as claimed in claim 1, wherein the signal processor is electrically connected to the inflation module, and the signal processor is further configured to determine the water separation cycle based on the concentration of the component to be measured, and to control the inflation module to inflate or deflate the water separation airbag based on the water separation cycle.

6. The water quality detection system as described in claim 5, wherein the signal processor is used to set the time length of the water removal cycle as a first time length when it is determined that the concentration of the analyte is within the normal range. When it is determined that the concentration of the component to be measured deviates from the normal range by a first preset value, the time length of the water separation cycle is set as the second time length, and When the concentration of the component to be tested deviates from the normal range by a second preset value, the duration of the water separation cycle is set to zero. The second preset value is greater than the first preset value, and the first time length is greater than the second time length.

7. The water quality detection system as claimed in claim 1, wherein the water-free airbag has a first state and a second state depending on the internal inflation volume, the signal processor is electrically connected to the inflation module, and the signal processor is configured to perform self-calibration based on the concentration signal when controlling the inflation module to inflate the water-free airbag to reach the first state.

8. The water quality detection system as claimed in claim 1 further includes a float disposed on the side of the main body away from the fluorescence sensing membrane.

9. The water quality detection system as claimed in claim 1, wherein the water-free airbag has multiple states depending on the amount of air inside, and the inflation module is further used to control the amount of air in the water-free airbag so that the fluorescent sensing membrane is suspended at different depths below the liquid surface.

10. The water quality testing system as described in claim 1, further comprising: A floating platform is located on the surface of the liquid, and the inflation module is mounted on the floating platform.

11. The water quality testing system as claimed in claim 1, wherein the water quality testing device further comprises: A hollow cap is disposed on the main body, corresponding to the fluorescence sensing membrane, and forms an open space between the cap and the membrane to allow the aqueous solution to flow. The water quality testing system also includes: A cleaning device is provided on the hollow cover for cleaning the fluorescence sensing membrane after it floats to the surface of the liquid.

12. The water quality testing system as claimed in claim 1, wherein the water quality testing device further comprises: An antibacterial light source is disposed on the body and is used to emit antibacterial light to the side of the fluorescent sensing membrane that is in direct contact with the aqueous solution.

13. The water quality testing system of claim 12, wherein the antibacterial light emitted by the antibacterial light source comprises blue light or ultraviolet light.

14. The water quality detection system of claim 12, wherein the antibacterial light source comprises a plurality of light-emitting diodes corresponding to different wavelength ranges.

15. The water quality testing system of claim 12, wherein the antibacterial light source is connected to the signal processor, and the signal processor is further configured to control the intensity of the antibacterial light generated by the antibacterial light source according to the concentration of the component to be tested.

16. A water quality testing device for measuring the concentration of a analyte in an aqueous solution, comprising: ontology; A sensing light source is disposed within the body and is used to emit sensing light; A fluorescent sensing film includes a reactive layer and a light-shielding layer. The reactive layer is disposed on the light-transmitting surface of the body, and the light-shielding layer is disposed on the reactive layer and is used to directly contact the aqueous solution. The reactive layer is used to receive the sensing light to generate feedback light. A photodetector, disposed within the body, is used to receive the feedback light to generate a concentration signal; A signal processor, disposed within the main body and connected to the photodetector, is used to determine the concentration of the analyte in the aqueous solution based on the concentration signal; and An antibacterial light source is disposed on the body and is used to emit antibacterial light to the side of the light-shielding layer that is in direct contact with the aqueous solution.

17. The water quality testing device of claim 16, wherein the antibacterial light emitted by the antibacterial light source comprises blue light or ultraviolet light.

18. The water quality testing device of claim 16, wherein the antibacterial light source comprises a plurality of light-emitting diodes corresponding to different wavelength ranges.

19. The water quality testing device of claim 16, wherein the antibacterial light source is connected to the signal processor, and the signal processor is further configured to control the intensity of the antibacterial light generated by the antibacterial light source according to the concentration of the component to be tested.

20. The water quality testing device as described in claim 16, further comprising: A hollow cover is disposed on the body, corresponding to the fluorescence sensing membrane, and forming an open space between the cover and the fluorescence sensing membrane to allow the aqueous solution to flow, and the antibacterial light source is disposed on the hollow cover.

Images