Mixing container passive wireless sensing system and method based on micro wave energy power generation

Abstract

The invention relates to a stirring container passive wireless sensing system and method based on micro wave energy power generation. The system comprises a floater placed on the liquid level in a stirring container, and an energy collection module, a multi-parameter sensor module, a wireless transmission module and a dynamic positioning device which are arranged on the floater; the energy acquisition module is used for converting kinetic energy of stirring water flow into electric energy through an energy conversion mechanism and storing the electric energy in an energy storage unit; the multi-parameter sensor module comprises a plurality of different types of sensors packaged in a ceramic substrate; the wireless transmission module is in wireless communication with a far-end server by adopting a LoRa-PHY (Physical Layer) mixed protocol; the dynamic positioning device is used for controlling the relative distance between the floater and the stirring blade based on sound wave distance measurement. The energy storage unit supplies power to the multi-parameter sensor module, the wireless transmission module and the dynamic positioning device.

Description

Technical Field

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

[0002] In power facilities, many water tanks need to monitor parameters such as PH, turbidity, and temperature inside them in real time to ensure the normal operation of the system and the stability of water quality. However, traditional monitoring methods often require wired power supply and wired signal transmission, which not only increases the complexity and cost of the system, but also makes it difficult to achieve effective monitoring in some scenarios where wiring is difficult or inconvenient. In addition, wall-mounted or sleeve-type contact measurement devices are commonly used for stirring water tanks, which have the following defects: risk of mechanical damage: the high-speed rotation of the stirrer causes the sensor probe to break; corrosion failure: traditional metal protection sleeves are prone to electrochemical corrosion in acidic and alkaline environments.

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

[0004] In order to solve the problems existing in the above-mentioned prior art, the present invention proposes a passive wireless sensing system and method for a stirring container based on micro-wave energy generation, which utilizes the wave energy generated during the operation of the stirrer in the water tank, converts the wave energy into electrical energy through an energy conversion mechanism, and stores it in an energy storage unit without external power supply.

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

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

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

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

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

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

[0011] Among them, the energy storage unit powers the multi-parameter sensor module, the wireless transmission module, and the dynamic positioning device.

[0012] As 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, and the other end of the swing arm is connected to a rotating shaft;

[0014] The speed increasing gear includes a first gear arranged at the end of the rotating shaft away from the swing arm and a second gear fixedly sleeved on the rotating shaft of the permanent magnet rotor, and the second gear is used to drive the rotation of the rotating shaft of the permanent magnet rotor;

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

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

[0017] As a preferred embodiment, the surface of the ceramic substrate is coated with a polytetrafluoroethylene hydrophobic film, and a ring-shaped microchannel with a preset width and depth is provided on the surface of the ceramic substrate.

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

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

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

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

[0022] As a preferred embodiment, the dynamic positioning device includes two sets of orthogonally arranged ultrasonic ranging units, a position calculation unit, and a push-back type micro thruster arranged below the float.

[0023] On the other hand, the present invention also provides a passive wireless sensing method for a stirring container based on micro-wave energy generation, which is realized by using the passive wireless sensing system for a stirring container based on micro-wave energy generation according to any embodiment of the present invention. The method includes the following steps:

[0024] Preset the acquisition time node;

[0025] When it is at the acquisition time node, the energy storage unit powers the multi-parameter sensor module and the wireless transmission module;

[0026] The multi-parameter sensor module starts to collect corresponding sensing data through multiple sensors and outputs it to the wireless transmission module;

[0027] The wireless transmission module uploads the received sensing data to the remote server.

[0028] In another aspect, the present invention also proposes an electronic device, including a memory, a processor, and a computer program stored on 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.

[0029] In another aspect, the present invention also proposes a computer-readable storage medium, on which a computer program is stored. When the program is executed by a processor, 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.

[0030] The additional aspects and advantages of the present invention will be clarified in the following description, and some of them will be obvious from the description, or can be understood by practicing the present invention. In addition, the various aspects and advantages of the present invention can be realized and obtained through the method steps and combinations specifically pointed out in the appended claims. Description of the Drawings

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

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

[0033] The reference numerals in the figure are:

[0034] 100, float; 200, energy collection 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 thruster. Detailed Embodiments

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0036] It should be understood that the step numbers used in the text are only for convenient description and do not limit the execution order of the steps.

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

[0038] The terms "comprising" and "including" indicate the presence of the described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their combinations.

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

[0040] Embodiment 1:

[0041] See Figure 1 , this embodiment provides a passive wireless sensing system for a stirring container based on micro-wave energy generation, including 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 arranged on the float 100;

[0042] The energy harvesting module 200 converts the kinetic energy of the stirring water flow into electrical energy through an energy conversion mechanism and stores it in an energy storage unit;

[0043] The multi-parameter sensor module 300 includes a plurality of different types of sensors encapsulated in a ceramic matrix;

[0044] The wireless transmission module 400 uses a LoRa-PHY hybrid protocol to communicate wirelessly with a remote server;

[0045] The dynamic positioning device 500 controls the relative distance between the float 100 and the stirring blade based on acoustic ranging;

[0046] Among them, the energy storage unit supplies power to the multi-parameter sensor module 300, the wireless transmission module 400 and the dynamic positioning device 500.

[0047] As a preferred implementation manner of this embodiment, specifically see 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;

[0048] One end of the swing arm 201 contacts 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 a rotating shaft. The swing arm is impacted by the water flow to generate a ±45° swing → the drive shaft transmits the angular displacement to the rotating shaft;

[0049] The speed-increasing gear 202 includes a first gear disposed at one 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, and the second gear is used to drive the rotation of the rotating shaft of the permanent magnet rotor 203;

[0050] The permanent magnet rotor 203 is coupled with the stator coil 204.

[0051] Specifically, the length of the swing arm 201 is 150 mm, the diameter is 8 mm, and the installation inclination angle with the horizontal plane is 22°; the module of the speed-increasing gear 203 is 0.5, and the transmission ratio is 1:15.

[0052] As a preferred embodiment, the permanent magnet rotor 203 is a magnetic core array with a Halbach arrangement composed of 12 groups of N52 neodymium iron boron permanent magnets, including 12 permanent magnets of 10×10×5 mm, and the N-S poles are arranged alternately.

[0053] The stator coil 204 uses 6 layers of 0.8 mm thick FR4 plates, with 42 turns of copper wire per layer. The 6-layer stator coil 204 adopts a star-delta hybrid connection method. The odd layers (1 / 3 / 5) are connected in delta to reduce eddy current losses; the even layers (2 / 4 / 6) are connected in star to increase the output voltage.

[0054] When the magnetic core array rotates, the stator coil 204 generates three-phase alternating current (frequency 50 - 125 Hz, peak voltage 12 - 18 V).

[0055] As a preferred embodiment of this embodiment, the surface of the ceramic substrate is coated with a polytetrafluoroethylene hydrophobic film, and a ring-shaped microchannel with a preset width and depth is provided on the surface of the ceramic substrate.

[0056] As a preferred embodiment of this embodiment, a pH sensor, a turbidity sensor, and a temperature and humidity sensor are encapsulated in the ceramic substrate.

[0057] As a preferred embodiment of this embodiment, the wireless transmission module 400 includes a carrier frequency dynamic adjustment unit and an electromagnetic interference elimination circuit;

[0058] The carrier frequency dynamic adjustment unit is used to adaptively adjust the frequency of the transmitted wireless signal; it can automatically hop within the range of 868 MHz ± 10% to adapt to different communication environments.

[0059] The electromagnetic interference elimination circuit includes a second-order Butterworth filter and a magnetic ring common-mode choke coil, and is used to eliminate electromagnetic noise signals in the environment.

[0060] As a preferred embodiment of this embodiment, the dynamic positioning device 500 includes two sets of orthogonally arranged ultrasonic ranging units, a position calculation unit, and a reverse-thrust micro thruster 600 disposed below the float 100.

[0061] Among them, the ultrasonic ranging unit uses an ultrasonic transducer with an operating frequency of 200 kHz and a beam angle of 60°, and is used to measure the relative distance between the sensor and the stirring blade; two sets of ultrasonic transducers are orthogonally arranged, that is, their emission directions are perpendicular to each other. This arrangement can provide distance information in two directions, so as to achieve precise positioning in a two-dimensional space.

[0062] By measuring the time difference between the ultrasonic wave emitted from the sensor to the stirring blade and reflected back, the distances between the float 100 and the stirring blade in two directions can be calculated.

[0063] The position calculation unit is based on the TDOA algorithm with a positioning accuracy of ±3 mm, and is used to calculate the real-time position of the float 100; the TDOA algorithm is a positioning algorithm based on time difference. It calculates the position of the signal source (i.e., the stirring blade) by measuring the time difference of the ultrasonic signal arriving at different transducers. Specifically, it is assumed that after the ultrasonic signal is reflected from the stirring blade, it reaches two orthogonally arranged transducers respectively. Since the positions of the transducers are known, by measuring the time difference of the signals received by the two transducers, the relative position between the stirring blade and the float 100 can be calculated. The position calculation unit of this unit can achieve a positioning accuracy of ±3 mm. This high-precision positioning ability is achieved through precise time measurement and algorithm optimization.

[0064] The reverse-thrust micro thruster has a thrust range of 0.1 - 0.5 N and a response time < 100 ms, and is used to adjust the position of the float 100. This fast response ability enables the thruster to timely adjust the position of the sensor to maintain an appropriate distance from the stirring blade.

[0065] After the position calculation unit calculates the relative position between the float 100 and the stirring blade, if it is found that the distance between the two exceeds the preset safety range, the reverse-thrust micro thruster will be adjusted according to the position deviation signal. The reverse-thrust micro thruster generates a reverse thrust to push the float 100 to move to a new position, so as to restore to the preset safety distance range.

[0066] Through 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, ensure the stable operation of the float 100 in a complex stirring container environment, and avoid collision with the stirring blade at the same time.

[0067] Embodiment 2:

[0068] The present invention also provides a passive wireless sensing method for a stirring container based on micro-wave energy generation, which is implemented by using the passive wireless sensing system for a stirring container based on micro-wave energy generation according to any embodiment of the present invention. The method includes the following steps:

[0069] Preset the acquisition time node;

[0070] When at the acquisition time node, the energy storage unit supplies power to the multi-parameter sensor module 300 and the wireless transmission module 400;

[0071] The multi-parameter sensor module 300 starts to collect corresponding sensing data through multiple sensors and outputs the data to the wireless transmission module 400;

[0072] The wireless transmission module 400 uploads the received sensing data to the remote server.

[0073] Embodiment III:

[0074] This embodiment provides an electronic device, including a memory, a processor, and a computer program stored on 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 according to any embodiment of the present invention.

[0075] Embodiment IV:

[0076] This embodiment provides a computer-readable storage medium, on which a computer program is stored. When the program is executed by a processor, it implements the passive wireless sensing method for a stirring container based on micro-wave energy generation according to any embodiment of the present invention.

[0077] In the embodiments of the present application, "at least one" means one or more, and "a plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent the case of A existing alone, A and B existing simultaneously, or B existing alone. Where A and B may be singular or plural. The character " / " generally represents an "or" relationship between the associated objects before and after. "At least one of the following" and its similar expressions refer to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, and c may represent: a, b, c, a and b, a and c, b and c, or a and b and c, where a, b, and c may be single or multiple.

[0078] Those of ordinary skill in the art will realize that the various units and algorithm steps described in the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of electronic hardware. Whether these functions are executed in hardware or software depends on the specific application and design constraints of the technical solution. A professional technician can use different methods for each specific application to implement the described functions, but such implementation should not be considered to exceed the scope of this application.

[0079] Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated herein.

[0080] In several embodiments provided in this application, if any function is implemented in the form of a software functional unit and sold or used as an independent product, it 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 this 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 for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memory (hereinafter referred to as ROM), random access memory (hereinafter referred to as RAM), magnetic disks, or optical discs that can store program codes.

[0081] The above are only the embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A passive wireless sensing system for a stirring 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) provided on the float (100); The energy harvesting module (200) converts the kinetic energy of the stirring 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 matrix; The wireless transmission module (400) uses a LoRa-PHY hybrid protocol to communicate wirelessly with a remote server; The dynamic positioning device (500) controls the relative distance between the float (100) and the stirring paddle based on acoustic ranging; Among them, the energy storage unit powers the multi-parameter sensor module (300), the wireless transmission module (400) and the dynamic positioning device (500).

2. A 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) contacts the liquid surface and swings with the fluctuation of the liquid surface, and the other end of the swing arm (201) is connected through a rotating shaft; The speed increasing gear (202) includes a first gear arranged at one 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), and the second gear is used to drive the rotating shaft of the permanent magnet rotor (203) to rotate; The permanent magnet rotor (203) is coupled with the stator coil (204).

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

4. A passive wireless sensing system for a stirring container based on micro-wave energy generation according to claim 1, characterized in that: The surface of the ceramic matrix is coated with a polytetrafluoroethylene hydrophobic film, and a ring-shaped microchannel with a preset width and depth is opened on the surface of the ceramic matrix.

5. A passive wireless sensing system for a stirring container based on micro-wave energy generation according to claim 1, characterized in that: A pH sensor, a turbidity sensor and a temperature and humidity sensor are encapsulated in the ceramic matrix.

6. A passive wireless sensing system for a stirring 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 elimination circuit; The carrier frequency dynamic adjustment unit is used to adaptively adjust the frequency of the transmitted wireless signal; The electromagnetic interference elimination circuit is used to eliminate electromagnetic noise signals in the environment.

7. A passive wireless sensing system for a stirring 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 push-back type micro thruster (600) disposed below the float (100).

8. A passive wireless sensing method for a stirring container based on micro-wave energy harvesting, characterized in that, It is implemented by using the passive wireless sensing system for a stirring container based on micro wave energy generation according to any one of claims 1 to 7, and the method includes the following steps: Preset the acquisition time node; When at the acquisition time node, 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) uploads the received sensing data to the remote server.

9. An electronic device, comprising a memory, a processor, and a computer program stored on 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 according to claim 8.

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

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