Miniature wave energy power generation-based agitated vessel passive wireless sensing system and method

Abstract

The present invention relates to a miniature wave energy power generation-based agitated vessel passive wireless sensing system and method. The system comprises a float floating on the liquid surface inside an agitated vessel, and an energy acquisition module, a multi-parameter sensor module, a wireless transmission module and a dynamic positioning device which are arranged on the float. The energy acquisition module converts kinetic energy of an agitated water flow into electric energy by means of an energy conversion mechanism, and stores the electric energy in an energy storage unit. The multi-parameter sensor module comprises a plurality of different types of sensors encapsulated in a ceramic substrate. The wireless transmission module uses a LoRa-PHY hybrid protocol to perform wireless communication with a remote server. The dynamic positioning device controls the relative distance between the float and agitator impellers on the basis of ultrasonic ranging. The energy storage unit supplies power to the multi-parameter sensor module, the wireless transmission module, and the dynamic positioning device.

Description

Passive Wireless Sensing System and Method for Stirred Container Based on Microwave Energy Generation Technical Field

[0001] This invention relates to a passive wireless sensing system and method for a stirring container based on micro-wave energy generation, belonging to the field of equipment data transmission technology. Background Technology

[0002] In power facilities, many water tanks require real-time monitoring of parameters such as pH, turbidity, and temperature to ensure normal system operation and water quality stability. However, traditional monitoring methods often require wired power supply and wired signal transmission, which not only increases system complexity and cost but also makes effective monitoring difficult in scenarios where wiring is difficult or inconvenient. Furthermore, the commonly used wall-mounted or sleeve-type contact measuring devices in agitated water tanks have the following drawbacks: mechanical damage risk: high-speed rotation of the agitator can cause sensor probe breakage; corrosion failure: traditional metal protective sleeves are prone to electrochemical corrosion in acidic and alkaline environments.

[0003] Wave energy, as a renewable and clean energy source, has broad application prospects. Applying micro-wave energy generation technology to water tank monitoring scenarios can effectively solve the aforementioned problems, achieve passive wireless signal transmission, and improve the reliability and flexibility of the system. Summary of the Invention

[0004] To address the problems existing in the prior art, this invention proposes a passive wireless sensing system and method for a stirring container based on micro wave energy power generation. The system utilizes the wave energy generated by the stirrer in the water tank during operation, converts the wave energy into electrical energy through an energy conversion mechanism, and stores it in an energy storage unit, eliminating the need for an external power supply.

[0005] The technical solution of the present invention is as follows:

[0006] On one hand, the present invention provides a passive wireless sensing system for a stirred container based on micro wave energy power generation, including a float placed on the liquid surface inside the stirred container, and an energy harvesting module, a multi-parameter sensor module, a wireless transmission module and a dynamic positioning device disposed on the float.

[0007] The energy harvesting module converts the kinetic energy of the stirred water into electrical energy through an energy conversion mechanism and stores it in an energy storage unit;

[0008] The multi-parameter sensor module includes multiple different types of sensors encapsulated in a ceramic substrate;

[0009] The wireless transmission module uses the LoRa-PHY hybrid protocol to communicate wirelessly with the remote server.

[0010] The dynamic positioning device controls the relative distance between the float and the stirring blade based on acoustic ranging.

[0011] The energy storage unit supplies power to the multi-parameter sensor module, the wireless transmission module, and the dynamic positioning device.

[0012] In a preferred embodiment, the energy conversion mechanism includes a swing arm, a speed-increasing gear, a permanent magnet rotor, and a stator coil;

[0013] One end of the swing arm contacts the liquid surface and swings with the fluctuation of the liquid surface, while the other end of the swing arm is connected to a rotating shaft;

[0014] The speed-increasing gear includes a first gear located at the end of the shaft away from the swing arm and a second gear fixedly sleeved on the permanent magnet rotor shaft. The second gear is used to drive the permanent magnet rotor shaft to rotate.

[0015] The permanent magnet rotor is coupled to the stator coil.

[0016] In a preferred embodiment, the permanent magnet rotor is a magnetic core array composed of 12 groups of N52 neodymium iron boron permanent magnets arranged in a Halbach pattern.

[0017] In a preferred embodiment, the surface of the ceramic substrate is coated with a polytetrafluoroethylene hydrophobic film, and the surface of the ceramic substrate is provided with annular microchannels of a predetermined width and depth.

[0018] In a preferred embodiment, a pH sensor, a turbidity sensor, and a temperature and humidity sensor are encapsulated within the ceramic substrate.

[0019] In a preferred embodiment, the wireless transmission module includes a carrier frequency dynamic adjustment unit and an electromagnetic interference cancellation circuit;

[0020] The carrier frequency dynamic adjustment unit is used to adaptively adjust the frequency of the transmitted wireless signal;

[0021] The electromagnetic interference cancellation circuit is used to eliminate electromagnetic noise signals in the environment.

[0022] In a preferred embodiment, the dynamic positioning device includes two sets of orthogonally arranged ultrasonic ranging units, a position calculation unit, and a reverse-thrust micro-propeller disposed below the float.

[0023] On the other hand, the present invention also provides a passive wireless sensing method for a stirred container based on micro-wave energy power generation, which is implemented using the passive wireless sensing system for a stirred container based on micro-wave energy power generation as described in any embodiment of the present invention. The method includes the following steps:

[0024] Preset data collection time points;

[0025] When the data acquisition time point is reached, the energy storage unit supplies power to the multi-parameter sensor module and the wireless transmission module;

[0026] The multi-parameter sensor module starts up by collecting corresponding sensor data from multiple sensors and outputting it to the wireless transmission module.

[0027] The wireless transmission module sends the received sensor data to a remote server.

[0028] In another aspect, the present invention also proposes an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the passive wireless sensing method for a stirring container based on micro-wave energy power generation as described in any embodiment of the present invention.

[0029] In another aspect, the present invention also proposes a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the passive wireless sensing method for a stirring container based on micro-wave energy generation as described in any embodiment of the present invention.

[0030] Additional aspects and advantages of the invention will be set forth in the following description, and some of them will be obvious from the description, or may be learned by practicing the invention. Furthermore, various aspects and advantages of the invention may be realized and obtained by means of method steps and combinations particularly pointed out in the appended claims. Attached Figure Description

[0031] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present invention;

[0032] Figure 2 is a schematic diagram of the internal structure of the energy harvesting module in an embodiment of the present invention.

[0033] The attached figures are labeled as follows:

[0034] 100. Float; 200. Energy harvesting module; 201. Swing arm; 202. Speed-increasing gear; 203. Permanent magnet rotor; 204. Stator coil; 300. Multi-parameter sensor module; 400. Wireless transmission module; 500. Dynamic positioning device; 600. Reverse thrust micro-propeller. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] It should be understood that the step numbers used in the text are for ease of description only and are not intended to limit the order in which the steps are performed.

[0037] It should be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0038] The terms “comprising” and “including” indicate the presence of the described feature, whole, step, operation, element and / or component, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or collections thereof.

[0039] The term “and / or” refers to any combination of one or more of the associated listed items, as well as all possible combinations, and includes these combinations. Example

[0040] Referring to Figure 1, this embodiment provides a passive wireless sensing system for a stirred container based on micro wave energy power generation, including a float 100 placed on the liquid surface inside the stirred container, and an energy harvesting module 200, a multi-parameter sensor module 300, a wireless transmission module 400 and a dynamic positioning device 500 disposed on the float 100.

[0041] The energy harvesting module 200 converts the kinetic energy of the stirred water into electrical energy through an energy conversion mechanism and stores it in an energy storage unit;

[0042] The multi-parameter sensor module 300 includes multiple sensors of different types encapsulated in a ceramic substrate;

[0043] The wireless transmission module 400 uses the LoRa-PHY hybrid protocol to communicate wirelessly with the remote server.

[0044] The dynamic positioning device 500 controls the relative distance between the float 100 and the stirring blade based on acoustic ranging.

[0045] The energy storage unit supplies power to the multi-parameter sensor module 300, the wireless transmission module 400, and the dynamic positioning device 500.

[0046] As a preferred embodiment of this example, as shown in Figure 2, the energy conversion mechanism includes a swing arm 201, a speed-increasing gear 202, a permanent magnet rotor 203, and a stator coil 204.

[0047] One end of the swing arm 201 is in contact with the liquid surface and swings with the fluctuation of the liquid surface. The other end of the swing arm 201 is connected to one end of the rotating shaft. The swing arm is impacted by the water flow and swings at ±45° → the drive shaft transmits the angular displacement to the rotating shaft.

[0048] The speed-increasing gear 202 includes a first gear disposed at the end of the rotating shaft away from the swing arm 201 and a second gear fixedly sleeved on the rotating shaft of the permanent magnet rotor 203. The second gear is used to drive the rotating shaft of the permanent magnet rotor 203 to rotate.

[0049] The permanent magnet rotor 203 is coupled to the stator coil 204.

[0050] Specifically, the swing arm 201 is 150mm long and 8mm in diameter, and is installed at a 22° angle to the horizontal plane; the speed-increasing gear 203 has a module of 0.5 and a transmission ratio of 1:15.

[0051] In a preferred embodiment, the permanent magnet rotor 203 is a magnetic core array composed of 12 groups of N52 neodymium iron boron permanent magnets arranged in a Halbach pattern, including 12 10×10×5mm permanent magnets with alternating N and S poles.

[0052] The stator coil 204 uses a 6-layer 0.8mm thick FR4 board, with 42 turns of copper wire per layer. The 6-layer stator coil 204 adopts a star-delta hybrid connection method. The odd-numbered layers (1 / 3 / 5) are connected in delta to reduce eddy current losses; the even-numbered layers (2 / 4 / 6) are connected in star to increase the output voltage.

[0053] When the magnetic core array rotates, the stator coil 204 generates three-phase alternating current (frequency 50-125Hz, peak voltage 12-18V).

[0054] In a preferred embodiment of this invention, the surface of the ceramic substrate is coated with a polytetrafluoroethylene hydrophobic film, and the surface of the ceramic substrate is provided with annular microchannels of a predetermined width and depth.

[0055] In a preferred embodiment of this invention, a pH sensor, a turbidity sensor, and a temperature and humidity sensor are encapsulated within the ceramic substrate.

[0056] In a preferred embodiment of this invention, the wireless transmission module 400 includes a carrier frequency dynamic adjustment unit and an electromagnetic interference cancellation circuit.

[0057] The carrier frequency dynamic adjustment unit is used to adaptively adjust the frequency of the transmitted wireless signal; it can automatically hop frequencies within a range of 868MHz±10% to adapt to different communication environments.

[0058] The electromagnetic interference cancellation circuit includes a second-order Butterworth filter and a magnetic ring common-mode choke, used to eliminate electromagnetic noise signals in the environment.

[0059] As a preferred embodiment of this invention, the dynamic positioning device 500 includes two sets of orthogonally arranged ultrasonic ranging units, a position calculation unit, and a reverse thrust micro-propeller 600 disposed below the float 100.

[0060] The ultrasonic ranging unit uses an ultrasonic transducer operating at a frequency of 200kHz and a beam angle of 60° to measure the relative distance between the sensor and the agitator blades. Two sets of ultrasonic transducers are arranged orthogonally, meaning their emission directions are perpendicular to each other. This arrangement provides distance information in two directions, thus enabling precise positioning in two-dimensional space.

[0061] By measuring the time difference between the ultrasonic wave emitted from the sensor to the agitator blade and reflected back, the distance between the float 100 and the agitator blade in two directions can be calculated.

[0062] The position calculation unit, based on the TDOA algorithm, achieves a positioning accuracy of ±3 mm and is used to calculate the real-time position of float 100. The TDOA algorithm is a time-difference positioning algorithm. It calculates the position of the signal source (i.e., the agitator blade) by measuring the time difference between the arrival times of the ultrasonic signal at different transducers. Specifically, it assumes that the ultrasonic signal, after being reflected from the agitator blade, reaches two orthogonally arranged transducers. Since the positions between the transducers are known, the relative position between the agitator blade and float 100 can be calculated by measuring the time difference between the signals received by the two transducers. This unit's position calculation unit can achieve a positioning accuracy of ±3 mm. This high-precision positioning capability is achieved through accurate time measurement and algorithm optimization.

[0063] The reverse thrust micro-thruster has a thrust range of 0.1-0.5N and a response time of <100ms. It is used to adjust the position of float 100. This rapid response capability allows the thruster to adjust the position of the sensor in a timely manner to maintain a suitable distance from the stirring blade.

[0064] Once the position calculation unit calculates the relative position of the float 100 and the stirring blade, if it finds that the distance between them exceeds the preset safety range, the reverse thrust micro-propeller will adjust according to the position deviation signal. The reverse thrust micro-propeller will generate reverse thrust to push the float 100 to a new position, thereby restoring it to the preset safety distance range.

[0065] Based on the above working principle, the dynamic positioning device can monitor and adjust the relative distance between the float 100 and the stirring blade in real time, ensuring that the float 100 operates stably in the complex stirring container environment, while avoiding collision with the stirring blade. Example

[0066] This invention also provides a passive wireless sensing method for a stirred container based on micro-wave energy generation, implemented using the passive wireless sensing system for a stirred container based on micro-wave energy generation as described in any embodiment of this invention. The method includes the following steps:

[0067] Preset data collection time points;

[0068] When the data acquisition time point is reached, the energy storage unit supplies power to the multi-parameter sensor module 300 and the wireless transmission module 400.

[0069] The multi-parameter sensor module 300 starts up by collecting corresponding sensing data from multiple sensors and outputting it to the wireless transmission module 400.

[0070] The wireless transmission module 400 sends the received sensor data to the remote server. Example

[0071] This embodiment proposes an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the passive wireless sensing method for a stirring container based on micro-wave energy generation as described in any embodiment of the present invention. Example

[0072] This embodiment proposes a computer-readable storage medium storing a computer program that, when executed by a processor, implements the passive wireless sensing method for a stirring container based on micro-wave energy generation as described in any embodiment of the present invention.

[0073] In this application embodiment, "at least one" refers to one or more, and "more than one" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent the existence of A alone, A and B simultaneously, or B alone. A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one of the following" and similar expressions refer to any combination of these items, including any combination of singular or plural items. For example, at least one of a, b, and c can represent: a, b, c, a and b, a and c, b and c, or a and b and c, where a, b, and c can be single or multiple.

[0074] Those skilled in the art will recognize that the units and algorithm steps described in the embodiments disclosed herein can be implemented using electronic hardware, computer software, or a combination of electronic hardware and software. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0075] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0076] In the several embodiments provided in this application, any function, if implemented as a software functional unit and sold or used as an independent product, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0077] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A passive wireless sensing system for a stirred container based on micro-wave energy generation, characterized in that, It includes a float (100) placed on the liquid surface inside the stirring container, and an energy harvesting module (200), a multi-parameter sensor module (300), a wireless transmission module (400) and a dynamic positioning device (500) set on the float (100). The energy harvesting module (200) converts the kinetic energy of the stirred water into electrical energy through an energy conversion mechanism and stores it in an energy storage unit; The multi-parameter sensor module (300) includes multiple different types of sensors encapsulated in a ceramic substrate; The wireless transmission module (400) uses the LoRa-PHY hybrid protocol to communicate wirelessly with the remote server. The dynamic positioning device (500) controls the relative distance between the float (100) and the stirring blade based on acoustic ranging. The energy storage unit supplies power to the multi-parameter sensor module (300), the wireless transmission module (400), and the dynamic positioning device (500).

2. The passive wireless sensing system for a stirring container based on micro-wave energy generation according to claim 1, characterized in that: The energy conversion mechanism includes a swing arm (201), a speed-increasing gear (202), a permanent magnet rotor (203), and a stator coil (204). One end of the swing arm (201) is in contact with the liquid surface and swings with the fluctuation of the liquid surface, while the other end of the swing arm (201) is connected to a rotating shaft; The speed-increasing gear (202) includes a first gear located at the end of the shaft away from the swing arm (201) and a second gear fixedly sleeved on the shaft of the permanent magnet rotor (203). The second gear is used to drive the shaft of the permanent magnet rotor (203) to rotate. The permanent magnet rotor (203) is coupled to the stator coil (204).

3. The passive wireless sensing system for a stirred container based on micro-wave energy generation according to claim 1, characterized in that: The permanent magnet rotor (203) is a magnetic core array composed of 12 groups of N52 neodymium iron boron permanent magnets arranged in a Halbach pattern.

4. The passive wireless sensing system for a stirred container based on micro-wave energy generation according to claim 1, characterized in that: The surface of the ceramic substrate is coated with a hydrophobic polytetrafluoroethylene film, and the surface of the ceramic substrate is provided with annular microchannels of a predetermined width and depth.

5. The passive wireless sensing system for a stirred container based on micro-wave energy generation according to claim 1, characterized in that: The ceramic substrate encapsulates a pH sensor, a turbidity sensor, and a temperature and humidity sensor.

6. The passive wireless sensing system for a stirred container based on micro-wave energy generation according to claim 1, characterized in that: The wireless transmission module (400) includes a carrier frequency dynamic adjustment unit and an electromagnetic interference cancellation circuit; The carrier frequency dynamic adjustment unit is used to adaptively adjust the frequency of the transmitted wireless signal; The electromagnetic interference cancellation circuit is used to eliminate electromagnetic noise signals in the environment.

7. The passive wireless sensing system for a stirred container based on micro-wave energy generation according to claim 1, characterized in that: The dynamic positioning device (500) includes two sets of orthogonally arranged ultrasonic ranging units, a position calculation unit, and a reverse thrust micro-propeller (600) located below the float (100).

8. A passive wireless sensing method for a stirred container based on micro-wave energy generation, characterized in that, The passive wireless sensing system for a stirred container based on micro-wave energy generation, as described in any one of claims 1 to 7, is used, and the method includes the following steps: Preset data collection time points; When the data acquisition time point is reached, the energy storage unit supplies power to the multi-parameter sensor module (300) and the wireless transmission module (400); The multi-parameter sensor module (300) starts to collect corresponding sensing data through multiple sensors and outputs it to the wireless transmission module (400). The wireless transmission module (400) sends the received sensor data to the remote server.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the passive wireless sensing method for a stirring container based on micro-wave energy generation as described in claim 8.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by the processor, the program implements the passive wireless sensing method for a stirred container based on micro-wave energy generation as described in claim 8.

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