Preparation method and application of self-driven water positioning device based on water-induced power generation

Abstract

The invention discloses the preparation and application of a self-driven water positioning device based on water-induced power generation. The water rescue device is composed of a power generation module and a voltage amplification module based on three series-connected carbon black-based water evaporation-induced power generation materials, a low-power wireless positioning module and commercial water rescue equipment. The power generation module embedded in the water rescue equipment serves as a power supply unit. When it comes into contact with water, it can generate an open circuit voltage of 2.1 V and a short circuit current of 0.56 mA. The low-power wireless positioning module can be driven to operate by amplification by the voltage amplification module. Driven by electric energy, the wireless positioning hardware transmits the signal of the detected position of the personnel to the mobile phone App terminal of the searcher in real time through wireless positioning, and sends a pop-up window or voice broadcast of the position through the mobile phone, finally realizing the self-powered positioning function. The present invention uses water evaporation-induced power generation materials, integrates them with low-power wireless positioning devices into water rescue equipment, realizes the self-powered positioning function, perfectly solves the pain points of existing products, and can be widely used in the field of water rescue.

Description

Technical Field

[0001] The present invention belongs to the technical field of new materials, and in particular relates to a preparation method and application of a self-driven water positioning device based on water-induced power generation. Background Art

[0002] Designing a water rescue device that can actively send positioning signals will greatly facilitate rescuers to quickly locate people who fall into the water and rescue them in time, which is of great significance to reducing the loss of life in water accidents and improving the efficiency of water safety rescue. Traditional water rescue devices can only provide buoyancy support and cannot track the location in real time. Lifeguards need to actively search for people who fall into the water, which not only increases the difficulty of the search, but may also threaten the safety of people's lives. With the increasing popularity of water activities, drowning accidents occur from time to time. How to find drowning people in time has become a top priority for rescue. A self-driven water positioning device based on water-induced power generation can well meet this demand.

[0003] At present, there are some water rescue products with positioning functions on the market. When a person falls into the water, they can send out a positioning signal to prompt the searcher's location, but there are also some defects in use. Most of these products use independent positioning transmitters and are not integrated with water rescue equipment. They need to be installed on the body separately, which is not convenient. In addition, the use of metal and plastic shells greatly reduces the wearing comfort. The core problem lies in the power supply method. Most of these products are battery-powered, which not only increases the cost, but also has the risk of environmental pollution, inconvenience in replacement and failure after the power is exhausted. In contrast, a self-powered positioning water rescue system based on the principle of water evaporation induced power generation integrates the power generation module and the positioning module into the water rescue equipment, which not only solves the inconvenience of using existing products, but also avoids the inconvenience and environmental problems caused by battery replacement, and is expected to achieve better positioning functions.

[0004] Self-powered functional devices are attracting widespread attention because they can directly obtain energy from the surrounding environment without the need for an external power source. Currently, the forms of self-powered devices include pyroelectric technology, piezoelectric technology, triboelectric technology, and water evaporation induced power generation technology. In a water environment, traditional power supply devices and other self-powered power generation technologies are prone to failure, while water evaporation induced power generation materials require additional water to ensure continuous power generation. The water environment can provide a steady supply of water. In addition, it can directly output direct current without the need for additional rectification processing, which is especially suitable for powering wearable devices in high humidity environments. This brings natural advantages to the application of water evaporation induced power generation materials in aquatic environments.

[0005] The present invention has developed a water positioning device using water evaporation induced power generation technology. By embedding a power generation module and a low-power wireless positioning module in the water rescue equipment, a self-powered real-time positioning function is realized; the power generation module is driven by the trace heat in the water to achieve continuous and uninterrupted power supply, and is integrated with the traditional water rescue equipment, which is highly practical; at the same time, the positioning water rescue equipment uses water evaporation induced power generation technology, which completely solves the problems of battery capacity and service life, can upload positioning information in real time, effectively improve the efficiency of water search and rescue, and is widely used in rescue work in waters such as sea and rivers. This design is innovative and practical, and is of great significance to improving water safety. Summary of the invention

[0006] The present invention provides a preparation method and application of a self-driven aquatic positioning device based on water-induced power generation. The positioning device enriches the functions of current aquatic rescue equipment and can achieve continuous and uninterrupted power supply.

[0007] The technical solution to achieve the above object is: a self-driven water positioning device based on water induced power generation, comprising a water rescue equipment body, characterized in that: it comprises at least one power generation module installed on the water rescue equipment body and one end of which is in contact with water when in use, and the power generation module comprises a plurality of water evaporation induced power generation bodies connected in series;

[0008] A wireless positioning module connected to the power generation module is also provided on the water rescue equipment body. A voltage amplification module is connected in series between the power generation module and the wireless positioning module. The positioning device also includes a positioning terminal that is communicatively connected to the wireless positioning module.

[0009] Furthermore, the preparation method of the power generation module is:

[0010] 1) Preparation of mixed solution of carbon black and carbon nanotubes

[0011] Mixing carbon black, sodium dodecylbenzene sulfonate, hydroxylated multi-walled carbon nanotubes and deionized water, and then performing ultrasound to obtain a uniformly stirred mixed solution;

[0012] 2) Preparation of water evaporation induced power generation materials

[0013] Soaking the cut absorbent cotton in the mixed solution to form a carbon cloth, taking out the carbon cloth, squeezing out the excess mixed solution and drying it to obtain a water evaporation induced power generation material;

[0014] 3) Preparation of water evaporation induced electricity generator

[0015] Electrodes are coupled at both ends of the water evaporation induced power generation material to obtain a water evaporation induced power generation body;

[0016] 4) Preparation of power generation module

[0017] A plurality of water evaporation induction generators are connected in series through wires to obtain a power generation module.

[0018] Furthermore, in step 1) of the preparation method, the mass ratio of carbon black, sodium dodecylbenzene sulfonate, hydroxylated multi-walled carbon nanotubes, and deionized water is 0.9:3:0.1:80.

[0019] Furthermore, in step 1) of the preparation method, the ultrasonic time is 30 minutes.

[0020] Furthermore, in step 3) of the preparation method, the water evaporation induced power generation material is square, with a length and width of 4.0 cm×2.0 cm.

[0021] Furthermore, the power generation module, the voltage amplification module and the wireless positioning module are respectively attached to the water rescue equipment body by means of traceless double-sided adhesive tape.

[0022] Furthermore, when the power generation module is in use, water evaporation induces one end of each power generation body to contact with water and the other end to extend upwardly out of the water surface.

[0023] Furthermore, the wireless positioning module adopts a low-power wireless positioning module, and the low-power wireless positioning module and the voltage amplification module, as well as the voltage amplification module and the power generation module are respectively connected by waterproof plug-in terminals.

[0024] Furthermore, in step 3) of the preparation method, the coupling electrode is an iron-nickel alloy electrode and is a cube with a length, width and thickness of 9 mm×0.21 mm×2 mm.

[0025] Furthermore, the positioning terminal is a mobile terminal App. After water enters the power generation module, a signal is sent to the positioning terminal through the low-power wireless positioning module, and the positioning terminal obtains real-time location information through the mobile terminal App.

[0026] The present invention uses an impregnation method to load carbon black on absorbent cotton to form a water evaporation induced power generation material. The size of the water evaporation induced power generation body can be arbitrarily adjusted by cutting, and then they are connected in series to form a power generation module and placed on the surface of the absorption layer of the water rescue equipment. In the case of falling into water, water passes through the pore structure of the carbon cloth itself and the primary battery formed by the iron-nickel alloy electrode to achieve spontaneous evaporation drive + primary battery power generation, and no rectification and boost module processing is required. When falling into water, water evaporation induced power generation is achieved, the wireless positioning module is powered, the positioning terminal obtains the wireless positioning module connection signal, and sends a pop-up window or voice broadcast of the location through the mobile phone, finally realizing the self-powered positioning function of the water rescue equipment.

[0027] Beneficial effects of the present invention:

[0028] 1) The open circuit voltage of a single water evaporation induced power generator of carbon black and carbon nanotubes of the present invention can reach 0.78 V, and the short circuit current can reach 75 µA. Compared with the single water evaporation induced power generator prepared by removing the hydroxylated multi-walled carbon nanotubes (length and width of 4.0 cm×2.0 cm, open circuit voltage of 0.45 V, short circuit current of 34 µA) and the single water evaporation induced power generator prepared by removing the carbon black (length and width of 4.0 cm×2.0 cm, open circuit voltage of 0.57 V, short circuit current of 39 µA), the electrical performance of the power generator can be significantly improved, and the electrical performance reaches the optimal value.

[0029] 2) The water evaporation-induced power generation body prepared by the present invention can output power up to 14.7 µW under optimized conditions. The evaporation-driven power generation module greatly reduces the load weight of the water rescue equipment while improving the output performance, thereby improving the user experience.

[0030] 3) The present invention uses self-powered power generation materials. Compared with the battery + sensor sensing devices sold on the market, the circuit composition difficulty is reduced and the wearing comfort is greatly improved. It is more efficient to use while achieving the positioning function and is environmentally friendly.

[0031] 4) The present invention is simple in construction, low in cost, and environmentally friendly. It increases the positioning function of water rescue equipment at a very low cost, thus providing assistance for water rescue. Meanwhile, the wireless positioning module is connected to the power module through a plug-in port and can be used repeatedly, thus reducing the cost.

[0032] 5) The positioning water rescue equipment uses water evaporation induced power generation technology, which completely solves the problems of battery capacity and service life. It uploads positioning information in real time, effectively improves the efficiency of water search and rescue, and is widely used in rescue work in seas, rivers and other waters. The design is innovative and practical, and is of great significance to improving water safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 The open circuit voltage test results of a single water evaporation induced generator prepared in the embodiment of the present invention and comparative examples 1 and 2 are as a function of time;

[0034] Figure 2 The test results of the short-circuit current variation over time of a single water evaporation induced generator prepared in the embodiment of the present invention and comparative examples 1 and 2;

[0035] Figure 3 The test results of the power variation over time of the evaporation driven power generation module prepared by the present invention;

[0036] Figure 4 The test results of the short-circuit current of the water evaporation induced generator prepared by the present invention in parallel connection;

[0037] Figure 5 The test results of the open circuit voltage of the water evaporation induced electricity generator prepared by the present invention in series connection;

[0038] Figure 6 It is a schematic diagram of the structure of the present invention applied to a life buoy and a life jacket;

[0039] Figure 7 It is a circuit principle block diagram of the present invention;

[0040] Figure 8 This is a schematic diagram of the App display when the present invention falls into water in the application state. DETAILED DESCRIPTION

[0041] In order to more clearly illustrate the technical solution of the present invention, the following examples are listed. Unless otherwise stated, the raw materials, reactions and post-treatment methods shown in the examples are common raw materials on the market and technical methods well known to those skilled in the art.

[0042] 1. Implementation

[0043] The present invention discloses a self-driven water positioning device based on water-induced power generation, and the specific process is as follows:

[0044] 1) Preparation of small-sized water evaporation-induced power generation materials

[0045] 0.45 g of carbon black, 1.5 g of sodium dodecylbenzene sulfonate, 0.05 g of hydroxylated multi-walled carbon nanotubes, and 40 ml of deionized water were mixed, sealed with plastic wrap, and subjected to ultrasound (100 W) for 30 minutes to obtain a mixed solution.

[0046] The cut absorbent cotton (2 cm × 5 cm) was soaked in the mixed solution for 1 minute, and the excess mixed solution was squeezed out with tweezers and placed in a 60 °C oven to dry for more than 12 h to obtain dry carbon cloth. The dry carbon cloth was cut again to obtain the power generation material (4.0 cm × 2.0 cm).

[0047] 2) Preparation of power generation module

[0048] like Figure 6 As shown, electrodes are coupled at both ends of the water evaporation induced power generation material to obtain a water evaporation induced power generation body, and three water evaporation induced power generation bodies are connected in series with wires to form a power generation module.

[0049] 3) Installation of power generation module

[0050] like Figure 6As shown, the power generation module is attached to the water rescue equipment body by traceless double-sided tape. When the power generation module is in use, water evaporation induces one end of the power generation body to contact with water and the other end to extend upward out of the water. Specific technicians in this field can reasonably install it according to actual use conditions. For example, a life buoy can be installed on the lower side wall, and a life jacket can be installed on the chest. When in use, the contact between the power generation module and the water can be manually controlled.

[0051] As a further illustration of this embodiment, water rescue equipment includes but is not limited to life buoys, life jackets and other life-saving equipment.

[0052] 4) Connect the wireless positioning module

[0053] The wireless positioning module adopts a low-power wireless positioning module with waterproof function. The low-power wireless positioning module can be specifically but not limited to the wireless positioning module of model F35 produced by Guangdong Xiaolangxing IoT Co., Ltd. The wireless positioning module adopts a low-power wireless positioning module. The low-power wireless positioning module is connected to the positive and negative poles of the power generation module through the voltage amplification module. The low-power wireless positioning module and the voltage amplification module, and the voltage amplification module and the power generation module are respectively connected through waterproof plug-in terminals. The specific connection circuit is as follows Figure 7 shown.

[0054] The wireless positioning module and the voltage amplification module are simultaneously attached to the water rescue equipment body by means of traceless double-sided tape, so as to facilitate the wireless positioning module to be installed on different water rescue equipment. Preferably, the wireless positioning module is installed on the side of the water rescue equipment body that faces away from the water or a part that does not contact the water when in use.

[0055] 2. Comparative Example 1

[0056] The overall scheme of the comparative example is substantially the same as that of the embodiment, except that the hydroxylated multi-walled carbon nanotubes are removed from the mixed solution.

[0057] 3. Comparative Example 2

[0058] The overall scheme of the comparative example is substantially the same as that of the embodiment, except that carbon black is removed from the mixed solution.

[0059] 3. Performance test and results:

[0060] The positive and negative electrodes of the water evaporation induced generator prepared in the embodiment of the present invention and comparative examples 1 and 2 were connected to a current and voltage tester, and 50 microliters of water was dripped into the water evaporation induced generator. The measurement results of the current and voltage tester were as follows: Figure 1 , 2 As shown, Figure 1 The open circuit voltage of the water evaporation induced generator of the embodiment of the present invention and comparative examples 1 and 2 varies with time. Figure 2The test results of the short-circuit current variation of the water evaporation-induced generator in the embodiment of the present invention and comparative examples 1 and 2 over time are shown; Figure 1 , 2 It can be seen that the water evaporation induced generator prepared in comparative example 1 has an open circuit voltage of 0.45 V and a short circuit current of 34 µA, the water evaporation induced generator prepared in comparative example 2 has an open circuit voltage of 0.57 V and a short circuit current of 39 µA, and the water evaporation induced generator prepared in this embodiment has an open circuit voltage of 0.78 V and a short circuit current of 75 µA. It is obvious that the design of carbon black plus carbon nanotubes has better power generation performance than pure carbon black and pure carbon nanotubes.

[0061] Figure 3 The test results of the power variation over time of a single water evaporation induced power generator with a length and width of 4.0 cm×2.0 cm after contacting water are prepared for the embodiment of the present invention. Figure 4 The test results of short-circuit current when different numbers of water evaporation-induced generators are connected in parallel are prepared for the embodiments of the present invention. Figure 5 The test results of short-circuit current when different numbers of water evaporation-induced generators are connected in series are prepared for the embodiments of the present invention. Figure 4 It can be seen that when the number of parallel connections of the water evaporation induced power generator prepared in the embodiment of the present invention increases, the short-circuit current gradually increases. Figure 5 It can be seen that when the number of water evaporation induced electricity generators prepared in the embodiment of the present invention increases in series, the open circuit voltage gradually increases. Therefore, the water evaporation induced electricity generator prepared in the embodiment of the present invention has a series effect and a parallel effect.

[0062] 5. Application Objects

[0063] Example 1: Water staff

[0064] like Figure 6 As shown, it is used to monitor the position and status of water workers wearing water rescue equipment (life jackets) in real time.

[0065] Example 2 Swimmer

[0066] like Figure 6 As shown, it is used to monitor the whereabouts and status of swimmers wearing water rescue equipment (life buoy or life jacket) in real time.

[0067] Example 3 Cruise ship passengers

[0068] Cruise ship passengers wearing water rescue equipment (life jackets) can use the positioning system to obtain location information for rescue investigation when they accidentally fall into the water.

[0069] Example 4: Lifeguard at sea

[0070] Monitor the location of lifeguards wearing water rescue equipment (life jackets) to facilitate command and dispatch and improve water rescue efficiency.

[0071] Place the mobile phone in the signal transmission range of the wireless positioning module. After testing, in the application process of Example 1-4, the mobile terminal App is as follows when falling into the water Figure 8 It is shown that the positioning signal sent by the wireless positioning module can be obtained 100% smoothly.

[0072] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A self-driven water positioning device based on water-induced power generation, comprising a water rescue equipment body, characterized in that: The water rescue equipment comprises at least one power generation module installed on the water rescue equipment body, wherein the power generation module comprises a plurality of water evaporation induced power generation bodies connected in series; a wireless positioning module connected to the power generation module is also arranged on the water rescue equipment body, a voltage amplification module is connected in series between the power generation module and the wireless positioning module, and the positioning device further comprises a positioning terminal connected to the wireless positioning module in communication; The preparation method of the power generation module is as follows: 1) Preparation of mixed solution of carbon black and carbon nanotubes Mixing carbon black, sodium dodecylbenzene sulfonate, hydroxylated multi-walled carbon nanotubes and deionized water, and then performing ultrasound to obtain a uniformly stirred mixed solution; 2) Preparation of water evaporation induced power generation materials The cut absorbent cotton is soaked in the mixed solution to form a carbon cloth, and the excess mixed solution is squeezed out after the carbon cloth is taken out and then dried to obtain a water evaporation induced power generation material; the water evaporation induced power generation material is square, with a length and width of 2 cm×4 cm; 3) Preparation of water evaporation induced electricity generator Electrodes are coupled at both ends of the water evaporation induced power generation material to obtain a water evaporation induced power generation body; 4) Preparation of power generation module A plurality of water evaporation induction generators are connected in series through wires to obtain a power generation module.

2. A self-driven water positioning device based on water-induced power generation according to claim 1, characterized in that: In step 1) of the preparation method, the mass ratio of carbon black, sodium dodecylbenzene sulfonate, hydroxylated multi-walled carbon nanotubes and deionized water is 0.9:3:0.1:

80.

3. A self-driven water positioning device based on water-induced power generation according to claim 1, characterized in that: The ultrasonic time in step 1) of the preparation method is 30 minutes.

4. The self-driven water positioning device based on water-induced power generation according to claim 1, characterized in that: The power generation module, the voltage amplification module and the wireless positioning module are respectively attached to the water rescue equipment body by means of traceless double-sided adhesive tapes.

5. The self-driven water positioning device based on water-induced power generation according to claim 1, characterized in that: When the power generation module is in use, each water evaporates and one end of the induction power generation body contacts the water, while the other end extends upward out of the water surface.

6. The self-driven water positioning device based on water-induced power generation according to claim 1, characterized in that: The wireless positioning module adopts a low-power wireless positioning module, and the low-power wireless positioning module and the voltage amplification module, as well as the voltage amplification module and the power generation module are respectively connected by waterproof plug-in terminals.

7. The self-driven water positioning device based on water-induced power generation according to claim 1, characterized in that: In step 3) of the preparation method, the coupling electrode is an iron-nickel alloy electrode and is in the shape of a cube with a length, width and thickness of 9 mm×0.21 mm×2 mm.

8. The self-driven water positioning device based on water-induced power generation according to claim 1, characterized in that: The positioning terminal is a mobile terminal App. After water enters the power generation module, a signal is sent to the positioning terminal through the low-power wireless positioning module, and the positioning terminal obtains real-time location information through the mobile terminal App.

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