Solution concentration detection device and detection method

Abstract

The invention relates to the technical field of solution detection, in particular to a solution concentration detection device and method.The solution concentration detection device comprises a self-power-generation module, an energy storage module, a detection module and a signal processing module which are installed on a solution circulation pipeline, and a solution to be detected flows through the solution circulation pipeline to drive the self-power-generation module to generate power; the energy storage module adjusts, distributes and controls electric energy, the energy storage module sends an electric signal to the emitter, the electric signal emitted by the emitter passes through a solution to be detected and then is received by the receiver, and the signal processing module processes and calculates the electric signal received by the receiver to obtain the concentration of the solution to be detected. Mechanical energy generated by chemical substances in the solution is converted into electric energy through the displacement current effect, the solution concentration is detected, compared with a traditional solution concentration detection method, the device has the advantages of being simple in structure, free of an external power source, low in cost, easy to operate, capable of achieving real-time monitoring and the like, and self-powered solution concentration detection can be achieved; and the application scene is expanded.

Description

Technical Field

[0001] The present invention relates to the technical field of solution detection, and in particular to a solution concentration detection device and a detection method. Background Art

[0002] With the continuous development of science and technology and the increase in social needs, solution testing technology has been widely used in many fields. Solution testing involves the analysis of the composition, concentration, physical properties, chemical properties, etc. of liquid samples, and its application covers many important fields such as agriculture, industrial production, medical diagnosis, food safety, etc.

[0003] At present, the solution concentration detection methods include traditional titration, spectrophotometry, gravimetric methods and other classical technologies, as well as modern electrochemical methods, chromatography, microfluidics and other advanced methods. The detection devices used in these solution concentration detection methods all need to rely on external batteries or power supplies. During the detection process, it may be necessary to frequently replace batteries or perform detection in an environment with power supply, which is not only cumbersome, but also limits the use scenarios. Summary of the invention

[0004] The present invention provides a solution concentration detection device and a detection method, which are used to solve the defect that the solution concentration detection in the prior art needs to rely on external batteries or power supply, and realize self-powered detection of solution concentration.

[0005] The present invention provides a solution concentration detection device, comprising a solution circulation pipeline, a self-generating module, an energy storage module, a detection module and a signal processing module, wherein the solution circulation pipeline is used to circulate a solution to be tested; the self-generating module is installed on the solution circulation pipeline to generate electricity through the solution to be tested that circulates through the solution circulation pipeline; the energy storage module is installed on the solution circulation pipeline and is electrically connected to the self-generating module to receive the electric energy generated by the self-generating module; the detection module comprises a transmitter and a receiver located in the solution circulation pipeline, the transmitter is electrically connected to the energy storage module, the transmitter is used to send an electric signal, and the receiver is used to receive the electric signal sent by the transmitter; the signal processing module is installed on the solution circulation pipeline, the signal processing module is electrically connected to the receiver, and is used to obtain the electric signal received by the receiver to calculate the concentration of the solution to be tested.

[0006] According to a solution concentration detection device provided by the present invention, the self-generating module includes a fixed static energy friction plate and a movable kinetic energy friction plate, the kinetic energy friction plate abuts against the surface of the static energy friction plate, and is suitable for rubbing with the static energy friction plate so that the static energy friction plate generates electrical energy, and the static energy friction plate is connected to the energy storage module via a wire.

[0007] According to a solution concentration detection device provided by the present invention, the self-generating module also includes a three-way tube body, an outer shell, a connecting rod and an impeller. The three-way tube body is serially connected in the solution circulation pipeline through a first pipe opening and a second pipe opening; the outer shell is connected to the third pipe opening of the three-way tube body, and the static energy friction plate is fixed in the outer shell; the first end of the connecting rod passes through the static energy friction plate and is connected to the kinetic energy friction plate; the impeller is connected to the second end of the connecting rod, and the impeller is located in the three-way tube body, and is suitable for rotating under the push of the solution to be tested flowing in the three-way tube body.

[0008] According to a solution concentration detection device provided by the present invention, the static energy friction plate includes a copper-clad PCB board and a dielectric loss material film attached to the copper-clad PCB board, the dielectric loss material film is used to generate electrical energy by friction with the kinetic energy friction plate, the copper-clad PCB board includes a PCB board and a plurality of copper foils attached to the PCB board, the plurality of copper foils are evenly arranged along the circumference of the PCB board, wherein two adjacent copper foils are respectively provided with solder joints, the two solder joints are respectively used as a positive contact point and a negative contact point, so as to be connected to the energy storage module through a wire.

[0009] According to a solution concentration detection device provided by the present invention, a disc is provided at the first end of the connecting rod, and the kinetic energy friction plate includes an acrylic plate, which is attached and connected to the end surface of the disc facing the static energy friction plate, and a friction member is provided on the surface of the acrylic plate facing the static energy friction plate, and the friction member is suitable for obtaining electricity after friction with the static energy friction plate.

[0010] According to a solution concentration detection device provided by the present invention, the energy storage module includes a supercapacitor and / or a micro battery.

[0011] According to a solution concentration detection device provided by the present invention, the transmitter is a ring antenna transmitter, and the transmitter is embedded in the inner wall of the solution circulation pipeline.

[0012] The receiver is a serial receiver, and the receiver and the transmitter are arranged at intervals in the solution flow pipeline, so that the electrical signal emitted by the transmitter is received by the receiver after passing through the solution to be tested.

[0013] According to a solution concentration detection device provided by the present invention, the signal processing module includes a signal amplification unit, a filtering unit, a calculation unit, an analog-to-digital conversion unit and a display unit connected in sequence, the signal amplification unit is connected to the receiver and is used to amplify the electrical signal received by the receiver, the filtering unit is used to remove noise and interference in the electrical signal, the calculation unit is used to calculate the concentration of the solution to be tested according to the received electrical signal, the analog-to-digital conversion unit is used to convert the analog electrical signal into a digital signal, and the display unit is used to display the detection result of the concentration of the solution to be tested in real time.

[0014] The present invention also provides a solution concentration detection method, which is applicable to any of the solution concentration detection devices described above, and the solution concentration detection method includes: controlling the solution to be tested to flow through a solution circulation pipeline, and the self-generating module generates electricity through the solution to be tested flowing through the solution circulation pipeline, and stores the electric energy in an energy storage module; sending an electrical signal to a transmitter through the energy storage module, and the transmitter transmits the electrical signal to the solution to be tested; receiving the electrical signal sent by the transmitter through a receiver; and a signal processing module acquiring the electrical signal received by the receiver, and performing data processing and calculation to obtain the concentration of the solution to be tested.

[0015] According to a solution concentration detection method provided by the present invention, the concentration of the solution to be tested is calculated by the following formula: , where Indicates the concentration of the solution to be tested. represents the applied current signal, represents the applied voltage signal, Indicates the coverage area of ​​the transmitter end. represents the distance between the transmitter and the receiver, It represents the conductivity of the solute in the solution to be tested. Indicates the conductivity of the solvent in the solution to be tested.

[0016] The solution concentration detection device and detection method provided by the present invention drive the self-generating module to generate electricity by allowing the solution to be tested to flow through the solution circulation pipeline, converting mechanical energy into electrical energy and storing it in the energy storage module. The energy storage module regulates, distributes and controls the electrical energy. The energy storage module sends an electrical signal to the transmitter. The transmitter transmits the electrical signal and passes through the solution to be tested and then receives it from the receiver. The signal processing module processes and calculates the electrical signal received by the receiver to obtain the concentration of the solution to be tested. The solution concentration detection device of the present invention utilizes the principle of a friction generator to convert the mechanical energy generated by the chemical substances in the solution into electrical energy through the displacement current effect, and utilizes the electrical energy to detect the solution concentration. Compared with the traditional solution concentration detection method, it has the advantages of simple structure, no need for external power supply, low cost, easy operation and real-time monitoring, etc. It realizes self-powered detection of solution concentration without the need for external power supply, thus expanding the application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or 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 some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of a solution concentration detection device provided by the present invention.

[0019] Figure 2 It is a schematic diagram of the external structure of the detection module provided by the present invention.

[0020] Figure 3 It is a schematic diagram of the cross-sectional structure of the detection module provided by the present invention.

[0021] Figure 4 It is a schematic diagram of the explosion structure of the self-generating module provided by the present invention.

[0022] Figure 5 It is a structural schematic diagram of the copper-clad PCB board provided by the present invention.

[0023] Figure 6 It is a schematic flow chart of the solution concentration detection method provided by the present invention.

[0024] Figure numerals: 1. solution circulation pipeline; 2. self-generating module; 21. static energy friction plate; 211. PCB board; 212. copper foil; 213. solder joint; 22. kinetic energy friction plate; 23. three-way pipe body; 24. outer shell; 25. connecting rod; 26. impeller; 27. disc; 3. energy storage module; 4. detection module; 41. transmitter; 42. receiver; 5. signal processing module. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are 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 creative work are within the scope of protection of the present invention.

[0026] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0027] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0028] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0029] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0030] Combine the following Figures 1 to 6 The solution concentration detection device and detection method of the present invention are described.

[0031] One embodiment of the present invention provides a solution concentration detection device, see Figure 1 As shown, the solution concentration detection device includes a solution circulation pipeline 1, a self-generating module 2, an energy storage module 3, a detection module 4 and a signal processing module 5, wherein the solution circulation pipeline 1 is used to circulate the solution to be tested; the self-generating module 2 is installed on the solution circulation pipeline 1 to generate electricity through the solution to be tested flowing through the solution circulation pipeline 1; the energy storage module 3 is installed on the solution circulation pipeline 1 and is electrically connected to the self-generating module 2 to receive the electric energy generated by the self-generating module 2; the detection module 4 includes a transmitter 41 and a receiver 42 located in the solution circulation pipeline 1, the transmitter 41 is electrically connected to the energy storage module 3, the transmitter 41 is used to send an electric signal, and the receiver 42 is used to receive the electric signal sent by the transmitter 41; the signal processing module 5 is installed on the solution circulation pipeline 1, and the signal processing module 5 is electrically connected to the receiver 42, and is used to obtain the electric signal received by the receiver 42 to calculate the concentration of the solution to be tested.

[0032] Combination Figure 2 and Figure 3 The structure of the detection module 4 shown is that it can be understood that the solution concentration detection device of this embodiment, through the solution to be tested flowing through the solution circulation pipeline 1, drives the self-generating module 2 to generate electricity, converts mechanical energy into electrical energy and stores it in the energy storage module 3, the energy storage module 3 regulates, distributes and controls the electrical energy, and the energy storage module 3 sends an electrical signal to the transmitter 41, the transmitter 41 transmits the electrical signal and passes through the solution to be tested and then is received by the receiver 42, and the signal processing module 5 processes and calculates the electrical signal received by the receiver 42 to obtain the concentration of the solution to be tested. The solution concentration detection device of this embodiment, using the principle of a friction generator, converts the mechanical energy generated by the chemical substances in the solution into electrical energy through the displacement current effect, and uses the electrical energy to detect the solution concentration. Compared with the traditional solution concentration detection method, it has the advantages of simple structure, no need for external power supply, low cost, easy operation and real-time monitoring, etc., and realizes self-powered detection of solution concentration without external power supply, which expands the application scenario.

[0033] In some embodiments of the solution concentration detection device of the present invention, see Figure 4As shown, the self-generating module 2 includes a fixed static friction plate 21 and a movable kinetic friction plate 22. The kinetic friction plate 22 abuts against the surface of the static friction plate 21 and is suitable for rubbing against the static friction plate 21 so that the static friction plate 21 generates electrical energy. The static friction plate 21 is connected to the energy storage module 3 through a wire. It can be understood that the kinetic friction plate 22 abuts against the surface of the static friction plate 21, and relative movement can occur between the static friction plate 21 and the kinetic friction plate 22. When the kinetic friction plate 22 and the static friction plate 21 rub against each other, the static friction plate 21 will generate electrical energy. This structural design of the present embodiment utilizes the principle of a friction nanogenerator (TENG), converting mechanical energy into electrical energy, and the static friction plate 21 transmits the generated electrical energy to the energy storage module 3 through a wire. The energy storage module 3 can be a supercapacitor or a micro battery, ensuring that the system can continue to work in a low-power mode and provide stable power support for other components.

[0034] Furthermore, the self-generating module 2 also includes a three-way tube body 23, an outer shell 24, a connecting rod 25 and an impeller 26. The three-way tube body 23 is serially connected in the solution circulation pipeline 1 through a first pipe opening and a second pipe opening; the outer shell 24 is connected to the third pipe opening of the three-way tube body 23, and the static energy friction plate 21 is fixed in the outer shell 24; the first end of the connecting rod 25 passes through the static energy friction plate 21 and is connected to the kinetic energy friction plate 22; the impeller 26 is connected to the second end of the connecting rod 25, and the impeller 26 is located in the three-way tube body 23, and is suitable for rotating under the push of the solution to be tested flowing in the three-way tube body 23.

[0035] Continue to see Figure 4 As shown, it can be understood that in this embodiment, the three-way pipe body 23 is connected in series in the solution flow pipeline 1 through its first pipe opening and the second pipe opening to form a complete fluid channel, so that the solution to be tested can flow smoothly, and the third pipe opening of the three-way pipe body 23 is used to connect the shell 24, which provides protection and support for the internal components. The static friction plate 21 is fixed in the shell 24 to ensure its position stability and provide a friction surface for the kinetic friction plate 22. The connecting rod 25 is a through-type rod, the first end of which passes through the static friction plate 21 and is connected to the kinetic friction plate 22, and the second end is connected to the impeller 26. The impeller 26 is located in the three-way pipe body 23. When the solution to be tested flows, it is subjected to the impact force of the water flow and rotates. This structure cleverly utilizes the principle of fluid dynamics, so that even under a small pressure difference, the impeller 26 can be driven to rotate effectively.

[0036] The impeller 26 rotates under the impetus of the solution fluid, thereby driving the connecting rod 25 to move together. The function of the connecting rod 25 is to transmit the rotational motion of the impeller 26 to the kinetic friction plate 22, so that the kinetic friction plate 22 can rotate relatively on the surface of the static friction plate 21, thereby generating a triboelectric effect. After the generated charges accumulate, they are transmitted to the energy storage module 3 (such as a supercapacitor or a micro battery) through a wire to achieve energy storage. This process does not require an external power supply at all, but is driven by the kinetic energy of the fluid itself. Therefore, it has a self-powered characteristic and is very suitable for scenarios that require long-term monitoring and are inconvenient to access external power supply, such as water quality monitoring in outdoor environments.

[0037] For some specific examples, see Figure 5 As shown, the static energy friction plate 21 includes a copper-clad PCB board and a dielectric material film attached to the copper-clad PCB board, the dielectric material film is used to generate electrical energy by friction with the kinetic energy friction plate 22, the copper-clad PCB board includes a PCB board 211 and a plurality of copper foils 212 attached to the PCB board 211, the plurality of copper foils 212 are evenly arranged along the circumference of the PCB board 211, wherein two adjacent copper foils 212 are respectively provided with solder joints 213, the two solder joints 213 are respectively used as positive contact points and negative contact points, so as to be connected to the energy storage module 3 through wires.

[0038] It can be understood that the copper-clad PCB board, as a base material, provides a basis for structural support and circuit connection, wherein the PCB board 211 constitutes the main frame of the static energy friction plate 21, and has good mechanical stability and electrical insulation. A plurality of copper foils 212 are applied to the PCB board 211 and are evenly arranged along its circumference. These copper foils 212 form a grid electrode for enhancing the conductive performance and can effectively collect the charge generated by friction. Solder points 213 are respectively provided on two adjacent copper foils 212, and these two solder points serve as positive contact points and negative contact points, respectively. In this way, it is ensured that the charge generated by friction can be effectively guided to the energy storage module 3 for storage. The film of the de-electrification material is applied to the copper-clad PCB board, directly contacts and rubs with the kinetic energy friction plate 22. The film of the de-electrification material is crucial to improving the efficiency of triboelectric charging. Usually, materials with high triboelectric negativity or positivity are selected, such as Teflon, polytetrafluoroethylene (PTFE), nylon, etc.

[0039] When the kinetic friction plate 22 and the static friction plate 21 are rubbed against each other, due to the different triboelectric series between the two materials, charge separation will occur on the interface, that is, one surface is positively charged and the other surface is negatively charged. The kinetic friction plate 22 and the static friction plate 21 are positively charged, and the copper foil 212 on the copper-clad PCB is responsible for collecting these charges and transmitting the charges to the energy storage module 3 through the positive and negative electrodes formed by the solder joints 213.

[0040] In other specific examples, a disc 27 is provided at the first end of the connecting rod 25, and the kinetic energy friction plate 22 includes an acrylic plate, which is attached to the end surface of the disc 27 facing the static energy friction plate 21, and a friction member is provided on the surface of the acrylic plate facing the static energy friction plate 21, and the friction member is suitable for obtaining electricity after friction with the static energy friction plate 21.

[0041] It can be understood that the connecting rod 25, as a transmission component, is responsible for transmitting the rotational motion of the impeller 26 to the kinetic friction plate 22. A disc 27 is provided at the first end of the connecting rod 25. The disc 27 is located at the end of the connecting rod 25 close to the static friction plate 21, and plays a role of connection and support. The disc 27 not only increases the stability of the structure, but also provides a mounting platform for the kinetic friction plate 22. The kinetic friction plate 22 is made of an acrylic plate, which has good mechanical strength, transparency and easy processing characteristics, and is suitable for triboelectric applications. The acrylic plate is firmly attached to the disc 27 by an adhesive or other fixing method to ensure that it can rotate with the connecting rod 25 and always maintain good contact with the static friction plate 21. Friction pieces are provided on the surface of the acrylic plate facing the static friction plate 21. These friction pieces are key components specially designed to improve the triboelectric effect. The friction member may be made of a highly triboelectrically negative material (such as animal hair, etc.) to enhance the charge separation phenomenon between the friction member and the static energy friction plate 21. When the two rub against each other, the friction member will quickly accumulate negative charge, thereby achieving efficient energy conversion.

[0042] As the impeller 26 is pushed to rotate by the solution to be tested, the connecting rod 25 drives the disc 27 and the kinetic friction plate 22 to rotate synchronously. In this process, the friction parts on the kinetic friction plate 22 continuously rub against the surface of the static friction plate 21, resulting in a large amount of charge separation. The copper foil on the copper-clad PCB board collects these charges and transmits them to the energy storage module 3 for storage through the positive and negative electrodes formed by the solder joints. The structural design of this embodiment improves the energy conversion efficiency of the self-generating module 2, and also enhances the stability and reliability of the system. It is particularly suitable for application in solution concentration detection devices that require long-term stable operation. In this way, even in a complex and changeable environment, the device can continue to effectively power other components to ensure the smooth completion of the detection task.

[0043] In some embodiments of the solution concentration detection device of the present invention, see Figure 3 As shown, the transmitter 41 is a ring antenna transmitter, and the transmitter 41 is embedded in the inner wall of the solution circulation pipeline 1. The receiver 42 is a serial receiver, and the receiver 42 and the transmitter 41 are arranged at intervals in the solution circulation pipeline 1, so that the electrical signal emitted by the transmitter 41 is received by the receiver 42 after passing through the solution to be tested.

[0044] It is understandable that the transmitter 41 is a ring antenna transmitter, which is embedded in the inner wall of the solution circulation pipeline 1 to ensure that it can fit closely to the internal structure of the pipeline without affecting the flow of the solution to be tested. The receiver 42 is a serial receiver, which is arranged at intervals with the transmitter 41 in the solution circulation pipeline 1, ensuring that the electrical signal emitted by the transmitter 41 can fully penetrate the solution to be tested and be captured by the receiver 42. The electric energy provided by the energy storage module 3 drives the transmitter 41 to work, so that it generates and emits electrical signals of a specific frequency, which are evenly distributed around the inner wall of the solution circulation pipeline 1 and propagates into the solution. The electrical signal emitted by the transmitter 41 is transmitted through the solution to be tested. Since solutions of different concentrations have different electrical conductivity (conductivity), this will cause the electrical signal to be attenuated or changed to varying degrees during the transmission process. The electrical signal after being conducted by the solution is finally received by the receiver 42, which is located at a distance from the transmitter 41 to ensure that the signal received is affected by the solution, rather than the unaffected signal leaked directly from the transmitter 41. The signal received by the receiver 42 is transmitted to the signal processing module 5 , which processes and calculates the received electrical signal to obtain the concentration value of the solution to be tested.

[0045] This embodiment uses a combination of a ring antenna transmitter and a serial receiver to more accurately capture the effect of the solution on the electrical signal, thereby improving the accuracy of the solution concentration measurement. The design of the transmitter 41 embedded in the inner wall of the solution circulation pipeline 1 reduces the interference of external environmental factors on the received signal, ensures the stability of the measurement process, and the compact design of the transmitter and receiver facilitates integration with other components, simplifying the assembly and maintenance process of the entire system. In the solution concentration detection device of the present invention, the structure and position design of the transmitter 41 and the receiver 42 not only improves the accuracy of the solution concentration measurement, but also enhances the stability and reliability of the system, and is particularly suitable for complex environments that require long-term stable operation.

[0046] In some embodiments of the solution concentration detection device of the present invention, the signal processing module 5 includes a signal amplification unit, a filtering unit, a calculation unit, an analog-to-digital conversion unit and a display unit connected in sequence, the signal amplification unit is connected to the receiver 42, and is used to amplify the electrical signal received by the receiver 42, the filtering unit is used to remove noise and interference in the electrical signal, the calculation unit is used to calculate the concentration of the solution to be tested based on the received electrical signal, the analog-to-digital conversion unit is used to convert the analog electrical signal into a digital signal, and the display unit is used to display the detection result of the concentration of the solution to be tested in real time.

[0047] It can be understood that the signal processing module 5 in this embodiment may have a weak signal strength after being conducted through the solution. In this embodiment, the signal processing module 5 is directly connected to the receiver 42 through a signal amplification unit to amplify the weak electrical signal received by the receiver 42 and enhance the signal amplitude for subsequent processing. In actual environments, the received signal is often accompanied by various types of noise (such as electromagnetic interference, thermal noise, etc.), which will affect the received signal and reduce the measurement accuracy. In this embodiment, the noise and interference in the electrical signal are removed by the filtering unit. The filtering unit can effectively eliminate or weaken these interference factors through appropriate filtering algorithms or hardware circuit design to ensure the purity of the signal. The calculation unit calculates the concentration of the solution to be tested based on the received electrical signal. The calculation unit has a built-in preset algorithm (such as regression analysis, neural network model, etc.), which can infer the conductivity or other related parameters of the solution based on the signal change characteristics, and further convert it into a concentration value. The calculation unit is the core part of the entire system, and the accuracy of its algorithm directly affects the reliability of the final detection result. The analog-to-digital conversion unit converts analog electrical signals into digital signals. Since most modern data processing and display devices work based on digital signals, an analog-to-digital conversion unit is required to convert the amplified and filtered analog signals into digital format for subsequent digital processing and display. The display unit is used to display the test results of the concentration of the solution to be tested in real time. The display unit usually includes a display screen (such as LCD, LED screen, etc.) and other user interface components, which can intuitively present the measurement data and facilitate operators to instantly understand the solution concentration information. In addition, some advanced display units can also provide historical data recording, alarm prompts and other functions to meet more complex application requirements.

[0048] The signal processing module 5 in this embodiment realizes the complete process from signal acquisition to data processing to result display. Through signal amplification, filtering and precise calculation, it ensures high-precision measurement of solution concentration. The filtering unit effectively removes noise and interference, improves the stability and reliability of the system, and the compact and modular design makes the signal processing module easy to integrate with other components, and can be functionally expanded according to specific application requirements. The display unit provides real-time data display, allowing users to quickly obtain the latest measurement results. The signal processing module 5 in this embodiment ensures the efficiency, accuracy and real-time performance of solution concentration detection, and is particularly suitable for applications that require long-term stable operation and have high requirements for measurement accuracy, such as water quality monitoring, industrial process control and other fields.

[0049] Another aspect of the present invention further provides a solution concentration detection method, which is applicable to the solution concentration detection device in any of the above embodiments. In some specific embodiments, see Figure 6 As shown, the solution concentration detection method of the present invention includes the following steps S1 to S4.

[0050] S1 , controlling the test solution to flow through the solution circulation pipeline 1 , the self-generating module 2 generates electricity through the test solution flowing through the solution circulation pipeline 1 , and stores the electric energy in the energy storage module 3 .

[0051] Specifically, the solution to be tested flows through the solution circulation pipeline 1. When the solution to be tested flows through the self-generating module 2, it drives the impeller 26 to rotate, thereby driving the connecting rod 25 and the kinetic friction plate 22 to rub against the static friction plate 21. Based on the principle of the friction nanogenerator (TENG), the static friction plate 21 generates electrical energy, and the electrical energy generated by the static friction plate 21 is transmitted to the energy storage module 3 (such as a supercapacitor or a micro battery) through a wire, ensuring that the system can continue to work in a low-power mode.

[0052] S2. Send an electrical signal to the transmitter 41 through the energy storage module 3, and the transmitter 41 transmits the electrical signal to the solution to be tested.

[0053] Specifically, the electric energy provided by the energy storage module 3 enables the transmitter 41 to work. The transmitter 41 is a ring antenna transmitter embedded in the inner wall of the solution circulation pipeline 1. The transmitter 41 uniformly transmits electrical signals into the solution. These signals will pass through the solution to be tested, and their propagation characteristics will be affected by the properties of the solution.

[0054] S3. Receive the electrical signal sent by the transmitter 41 through the receiver 42.

[0055] Specifically, the receiver 42 is a serial receiver, which is arranged in the solution flow pipeline 1 at intervals from the transmitter 41. The receiver 42 captures the signal affected by the solution, rather than the unaffected signal directly leaked from the transmitter 41, to ensure that the received signal is the true response of the solution to the signal.

[0056] S4. The signal processing module 5 obtains the electrical signal received by the receiver 42, and performs data processing and calculation to obtain the concentration of the solution to be tested.

[0057] Specifically, the signal amplification unit of the signal processing module 5 first amplifies the received weak signal, and then the filtering unit removes noise and interference in the signal to ensure the signal is pure. The calculation unit then analyzes the signal change according to a preset algorithm (such as regression analysis, neural network model, etc.), calculates the conductivity or other relevant parameters of the solution, and further converts it into a concentration value. The analog-to-digital conversion unit converts the analog signal into a digital signal for subsequent processing; the display unit displays the detection result of the concentration of the solution to be tested in real time, so that the user can instantly understand the solution information.

[0058] In some examples of the solution concentration detection method of the present invention, the concentration of the solution to be tested is calculated by the following formula: , where Indicates the concentration of the solution to be tested. represents the applied current signal, represents the applied voltage signal, Indicates the coverage area of ​​the transmitter end. represents the distance between the transmitter and the receiver, It represents the conductivity of the solute in the solution to be tested. Indicates the conductivity of the solvent in the solution to be tested.

[0059] It can be understood that the voltage signal and current signal applied by the energy storage module 3 to the detection module 4 can be obtained through the signal processing module 5. According to Ohm's law, the conductivity and the current, the applied voltage and the geometric shape of the solution (such as the surface area and distance of the electrodes) satisfy the following relationship: , where represents the applied current signal, represents the applied voltage signal, represents the conductivity of the solution, Indicates the coverage area of ​​the transmitter end. Indicates the distance between the transmitter and the receiver. Based on the annular area of ​​the annular transmitter (transmitter 41), the distance between the transmitter 41 and the receiver 42, and the voltage signal and current signal applied by the energy storage module 3 to the detection module 4 obtained by the signal processing module 5, the conductivity of the solution to be tested can be calculated. .

[0060] For electrolyte solutions, the conductivity of the solution usually has a certain relationship with the concentration of the solute. The higher the conductivity, the higher the ion concentration in the solution. This relationship may be nonlinear in different concentration ranges, but it can generally be approximated as a linear relationship at low concentrations. The relationship can be expressed as: , where Indicates the conductivity of the solution to be tested. It indicates the conductivity of the solvent in the solution to be tested. It represents the conductivity of the solute in the solution to be tested. represents the concentration of the solution to be tested. Then , according to the measured conductivity of the solution to be tested and the known conductivity of the solvent in the test solution , the conductivity of the solute in the solution to be tested The concentration of the solution to be tested can be calculated.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A solution concentration detection device, characterized in that: include: A solution circulation pipeline (1) for circulating the solution to be tested; A self-generating module (2) is installed on the solution circulation pipeline (1) to generate electricity from the solution to be tested flowing through the solution circulation pipeline (1); An energy storage module (3) is installed on the solution circulation pipeline (1) and is electrically connected to the self-generating module (2) to receive the electric energy generated by the self-generating module (2); A detection module (4), comprising a transmitter (41) and a receiver (42) located in the solution circulation pipeline (1), wherein the transmitter (41) is electrically connected to the energy storage module (3), the transmitter (41) is used to send an electrical signal, and the receiver (42) is used to receive the electrical signal sent by the transmitter (41); A signal processing module (5) is installed on the solution circulation pipeline (1), and the signal processing module (5) is electrically connected to the receiver (42) and is used to obtain the electrical signal received by the receiver (42) to calculate the concentration of the solution to be tested.

2. The solution concentration detection device according to claim 1, characterized in that: The self-generating module (2) comprises a fixed static energy friction plate (21) and a movable kinetic energy friction plate (22); the kinetic energy friction plate (22) abuts against the surface of the static energy friction plate (21) and is suitable for rubbing against the static energy friction plate (21) so that the static energy friction plate (21) generates electrical energy; the static energy friction plate (21) is connected to the energy storage module (3) via a wire.

3. The solution concentration detection device according to claim 2, characterized in that: The self-generating module (2) further comprises: A three-way pipe body (23), the three-way pipe body (23) being serially connected in the solution circulation pipeline (1) via a first pipe opening and a second pipe opening; A shell (24) connected to the third pipe opening of the three-way pipe body (23), wherein the static energy friction plate (21) is fixed in the shell (24); A connecting rod (25), wherein a first end of the connecting rod (25) passes through the static friction plate (21) and is connected to the kinetic friction plate (22); An impeller (26) is connected to the second end of the connecting rod (25). The impeller (26) is located in the three-way pipe body (23) and is suitable for rotating under the impetus of the solution to be tested flowing in the three-way pipe body (23).

4. The solution concentration detection device according to claim 3, characterized in that: The static energy friction plate (21) comprises a copper-clad PCB board and a dielectric material film attached to the copper-clad PCB board, the dielectric material film being used to generate electrical energy by friction with the kinetic energy friction plate (22), the copper-clad PCB board comprising a PCB board (211) and a plurality of copper foils (212) attached to the PCB board (211), the plurality of copper foils (212) being evenly arranged along the circumference of the PCB board (211), wherein two adjacent copper foils (212) are respectively provided with soldering points (213), the two soldering points (213) serving as a positive contact point and a negative contact point, respectively, to be connected to the energy storage module (3) via a wire.

5. The solution concentration detection device according to claim 3, characterized in that: A disc (27) is provided at the first end of the connecting rod (25); the kinetic energy friction plate (22) comprises an acrylic plate, the acrylic plate is attached and connected to the end surface of the disc (27) facing the static energy friction plate (21); a friction piece is provided on the surface of the acrylic plate facing the static energy friction plate (21); the friction piece is suitable for generating electricity after friction with the static energy friction plate (21).

6. The solution concentration detection device according to claim 1, characterized in that: The energy storage module (3) comprises a supercapacitor and / or a microbattery.

7. The solution concentration detection device according to claim 1, characterized in that: The transmitter (41) is a ring antenna transmitter, and the transmitter (41) is embedded in the inner wall of the solution circulation pipeline (1); The receiver (42) is a serial receiver, and the receiver (42) and the transmitter (41) are arranged at intervals in the solution circulation pipeline (1), so that the electrical signal emitted by the transmitter (41) passes through the solution to be tested and is received by the receiver (42).

8. The solution concentration detection device according to claim 1, characterized in that: The signal processing module (5) comprises a signal amplification unit, a filtering unit, a calculation unit, an analog-to-digital conversion unit and a display unit which are connected in sequence, the signal amplification unit being connected to the receiver (42) and being used to amplify the electrical signal received by the receiver (42), the filtering unit being used to remove noise and interference in the electrical signal, the calculation unit being used to calculate the concentration of the solution to be tested based on the received electrical signal, the analog-to-digital conversion unit being used to convert the analog electrical signal into a digital signal, and the display unit being used to display the detection result of the concentration of the solution to be tested in real time.

9. A method for detecting solution concentration, characterized in that: The solution concentration detection device according to any one of claims 1 to 8, wherein the solution concentration detection method comprises: Controlling the test solution to flow through the solution circulation pipeline (1), the self-generating module (2) generates electricity through the test solution flowing through the solution circulation pipeline (1), and storing the electric energy in the energy storage module (3); The energy storage module (3) sends an electrical signal to a transmitter (41), and the transmitter (41) transmits the electrical signal to a solution to be tested; Receiving the electrical signal sent by the transmitter (41) through a receiver (42); The signal processing module (5) obtains the electrical signal received by the receiver (42), and performs data processing and calculation to obtain the concentration of the solution to be tested.

10. The method for detecting solution concentration according to claim 9, characterized in that: The concentration of the solution to be tested is calculated by the following formula: , where Indicates the concentration of the solution to be tested. represents the applied current signal, represents the applied voltage signal, Indicates the coverage area of ​​the transmitter end. represents the distance between the transmitter and the receiver, It represents the conductivity of the solute in the solution to be tested. Indicates the conductivity of the solvent in the solution to be tested.

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