Adaptive control electromagnetic induction energy harvesting method and system for transmission conductor

Abstract

The present application provides an adaptive control electromagnetic induction energy harvesting method and system for a transmission conductor. The adaptive control electromagnetic induction energy harvesting method for a transmission conductor comprises: on the basis of an electromagnetic induction energy harvesting apparatus fixed to a transmission conductor, acquiring a first electromagnetic induction electromotive force; if the first electromagnetic induction electromotive force is smaller than a working electromagnetic induction electromotive force, controlling the electromagnetic induction energy harvesting apparatus to adaptively control a magnetic core unit on the basis of the first electromagnetic induction electromotive force to extend or retract in a coil unit, so as to obtain a second electromagnetic induction electromotive force; performing filtering, rectification and voltage conversion processing on the first electromagnetic induction electromotive force or / and the second electromagnetic induction electromotive force to obtain an electromagnetic induction output voltage; and on the basis of the electromagnetic induction output voltage, selecting to supply power to or charge an electric device.

Description

Transmission line adaptive control electromagnetic induction energy harvesting method and system

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on March 26, 2024, with application number 202410346976.8, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of power monitoring auxiliary equipment, for example, to a method and system for adaptively controlling electromagnetic induction energy extraction from transmission lines. Background Art

[0003] The importance of safe power transmission line operation and the increasing potential for accidents and safety hazards necessitate the installation of a large number of secondary low-voltage devices, such as monitoring and control equipment, on power cables and in their surroundings to ensure their safe and normal operation. Due to the long transmission distances of power cables, the diverse transmission methods of power transmission lines, and the complex environments, powering the secondary low-voltage devices on power transmission lines has become a major challenge. Therefore, developing a power supply with excellent performance, suitable for a variety of working environments, including outdoor environments, and relatively easy maintenance and installation, and applying it to online monitoring of power cable status parameters and ensuring its reliability is essential for ensuring safe production and power supply throughout the power system.

[0004] CN115528791A discloses an adaptive energy extraction and discharge method, system, and device for an inductive energy extraction circuit. Based on the real-time voltage of the energy storage capacitor, a first voltage threshold or a second voltage threshold is determined as a discharge voltage threshold. Specifically, when the real-time voltage of the energy storage capacitor is less than the full-charge voltage, that is, the energy storage capacitor is not fully charged, and the energy output of the inductive energy extraction circuit does not exceed the workload, the controller controls the first voltage threshold as the discharge voltage threshold, which is equivalent to increasing the discharge voltage threshold. This allows the inductive energy extraction circuit to obtain more energy to charge the energy storage capacitor, so that the energy storage capacitor can power the workload when the inductive energy extraction circuit discharges energy. When the real-time voltage of the energy storage capacitor is greater than or equal to the full-charge voltage, that is, the energy storage capacitor is fully charged, and the energy output of the inductive energy extraction circuit exceeds the workload, the controller controls the second voltage threshold as the discharge voltage threshold, which is equivalent to lowering the discharge voltage threshold. This allows the inductive energy extraction circuit to discharge energy at a lower power supply output voltage, preventing the inductive energy extraction circuit from excessive current and workload overload, thereby achieving the purpose of adaptive energy extraction and automatic protection of the inductive energy extraction circuit. However, since the inductive energy harvesting circuit cannot adaptively adjust the structure between the magnetic core and the coil, the inductive energy harvesting circuit is prone to magnetic saturation and the magnetic induction time is short, and it is impossible to inductively harvest energy for a longer period of time to obtain more electrical energy.

[0005] Summary of the Invention

[0006] The present application provides a method and system for adaptively controlling electromagnetic induction energy harvesting from a transmission line. An electromagnetic induction energy harvesting device is fixed to the transmission line, and a magnetic core unit is adaptively controlled to extend or retract within a coil unit to obtain electromagnetic induced electromotive force, and to selectively power or charge electrical equipment.

[0007] A method for adaptively controlling electromagnetic induction energy extraction from a transmission line, comprising: obtaining a first electromagnetic induced electromotive force based on an electromagnetic induction energy extraction device fixed to the transmission line, wherein the electromagnetic induction energy extraction device comprises a magnetic core unit, a processor unit, a voltage protection unit, a filter and rectifier unit, a voltage conversion unit, a telescopic unit, and a coil unit, wherein the processor unit is connected to the telescopic unit, the filter and rectifier unit are respectively connected to the voltage protection unit and the voltage conversion unit, the voltage protection unit is connected to the coil unit, the telescopic unit is fixedly connected to the magnetic core unit, the magnetic core unit is arranged in the coil unit, and the processor unit is arranged to transmit the telescopic unit. A contraction control signal is sent to the telescopic unit, and the telescopic unit is configured to control the magnetic core unit to extend or retract in the coil unit based on the telescopic control signal to obtain an electromagnetic induced electromotive force; if the first electromagnetic induced electromotive force is less than the working electromagnetic induced electromotive force, the electromagnetic induction energy acquisition device is controlled to adaptively control the magnetic core unit to extend or retract in the coil unit based on the first electromagnetic induced electromotive force to obtain a second electromagnetic induced electromotive force; the first electromagnetic induced electromotive force and / or the second electromagnetic induced electromotive force are filtered, rectified and voltage converted to obtain an electromagnetic induction output voltage; and power supply or charging of the electrical equipment is selected based on the electromagnetic induction output voltage.

[0008] The magnetic core unit and the coil unit are both cylindrical in shape. The magnetic core unit includes a first magnetic core sub-unit, a second magnetic core sub-unit, a magnetic core fixing sub-unit and a magnetic core connecting sub-unit. The magnetic core fixing sub-unit is fixedly connected to the first magnetic core sub-unit, the second magnetic core sub-unit and the magnetic core connecting sub-unit, wherein the magnetic core connecting sub-unit is arranged between the first magnetic core sub-unit and the second magnetic core sub-unit; the coil unit includes a first coil sub-unit and a second coil sub-unit, and the voltage protection unit is connected to the first coil sub-unit and the second coil sub-unit.

[0009] The electromagnetic induction energy harvesting device is fixed to the transmission line via a fixing unit, and a first electromagnetic induced electromotive force is obtained based on the electromagnetic induction energy harvesting device fixed to the transmission line, including: controlling a processor unit in the electromagnetic induction energy harvesting device to transmit a telescopic control signal to the telescopic unit, so that the telescopic unit controls the magnetic core unit to extend or retract within the first coil sub-unit based on the telescopic control signal, thereby obtaining the first electromagnetic induced electromotive force. The expression of the first electromagnetic induced electromotive force is as follows:

[0010] Wherein, V1 is the first electromagnetic induced electromotive force, N1 is the number of turns of the first coil subunit, μ1 is the magnetic permeability of the first magnetic core subunit, S1 is the equivalent cross-sectional area of ​​the first coil subunit, ω is the angular velocity, i y1 is the effective value of the current of the first coil sub-unit, and L1 is the magnetic path length of the first coil core.

[0011] Controlling the electromagnetic induction energy acquisition device to adaptively control the magnetic core unit to extend or retract within the coil unit based on the first electromagnetic induction electromotive force to obtain a second electromagnetic induction electromotive force, including: controlling the electromagnetic induction energy acquisition device to adaptively perform voltage compensation processing based on the first electromagnetic induction electromotive force; controlling the electromagnetic induction energy acquisition device to adaptively perform voltage compensation processing based on the first electromagnetic induction electromotive force, including: controlling the processor unit in the electromagnetic induction energy acquisition device to determine a second coil extension control signal or a second coil retraction control signal according to the coil voltage signal, and transmitting the second coil extension control signal or the second coil retraction control signal to the telescopic unit, so that the telescopic unit controls the magnetic core unit to extend or retract within the second coil sub-unit based on the second coil extension control signal or the second coil retraction control signal, and adaptively adjusts to obtain the second electromagnetic induction electromotive force, and the expression of the second electromagnetic induction electromotive force is as follows:

[0012] Wherein, V2 is the second electromagnetic induced electromotive force, N2 is the number of turns of the second coil subunit, μ2 is the magnetic permeability of the second magnetic core subunit, S2 is the equivalent cross-sectional area of ​​the second coil subunit, ω is the angular velocity, i y2 is the effective value of the current of the second coil sub-unit, and L2 is the magnetic path length of the second coil core.

[0013] Performing filtering, rectification, and voltage conversion processing on at least one of the first electromagnetic induced electromotive force and the second electromagnetic induced electromotive force to obtain an electromagnetic induction output voltage, including: when the first electromagnetic induced electromotive force is greater than or equal to the working electromagnetic induced electromotive force, performing filtering, rectification, and voltage conversion processing on the first electromagnetic induced electromotive force to obtain the electromagnetic induction output voltage; when the first electromagnetic induced electromotive force is less than the working electromagnetic induced electromotive force, and the second electromagnetic induced electromotive force is greater than or equal to the working electromagnetic induced electromotive force, disconnecting the first coil subunit, performing filtering, rectification, and voltage conversion processing on the second electromagnetic induced electromotive force to obtain the electromagnetic induction output voltage; when the first electromagnetic induced electromotive force is less than the working electromagnetic induced electromotive force, and the second electromagnetic induced electromotive force is also less than the working electromagnetic induced electromotive force, performing filtering, rectification, and voltage conversion processing on the sum of the first electromagnetic induced electromotive force and the second electromagnetic induced electromotive force to obtain the electromagnetic induction output voltage.

[0014] Selecting to power or charge the electrical equipment based on the electromagnetic induction output voltage includes: comparing the electromagnetic induction output voltage with a threshold voltage; selecting to power or charge based on the voltage comparison result: if the electromagnetic induction output voltage is less than the threshold voltage, charging the electric energy storage unit, or / and powering the electrical equipment by the electric energy storage unit; if the electromagnetic induction output voltage is greater than or equal to the threshold voltage, powering the electrical equipment.

[0015] A transmission line adaptive control electromagnetic induction energy acquisition system, including an electromagnetic induction energy acquisition device and an analysis and control unit, wherein the electromagnetic induction energy acquisition device includes a magnetic core unit, a processor unit, a voltage protection unit, a filter and rectifier unit, a voltage conversion unit, a telescopic unit and a coil unit, the processor unit is connected to the telescopic unit, the filter and rectifier unit is connected to the voltage protection unit and the voltage conversion unit, the voltage protection unit is connected to the coil unit, the telescopic unit is fixedly connected to the magnetic core unit, the magnetic core unit is arranged in the coil unit, the processor unit is configured to transmit a telescopic control signal to the telescopic unit, and the telescopic unit is configured to control the telescopic unit based on the telescopic control signal. The magnetic core unit is extended or retracted in the coil unit to obtain an electromagnetic induced electromotive force; the analysis and control unit is configured to obtain a first electromagnetic induced electromotive force based on an electromagnetic induction energy acquisition device fixed to the transmission line; if the first electromagnetic induced electromotive force is smaller than the working electromagnetic induced electromotive force, the electromagnetic induction energy acquisition device is controlled to adaptively control the magnetic core unit to extend or retract in the coil unit based on the first electromagnetic induced electromotive force to obtain a second electromagnetic induced electromotive force; the first electromagnetic induced electromotive force and / or the second electromagnetic induced electromotive force are filtered, rectified and voltage converted to obtain an electromagnetic induction output voltage; and power supply or charging of electrical equipment is selected based on the electromagnetic induction output voltage.

[0016] The magnetic core unit and the coil unit are both cylindrical in shape. The magnetic core unit includes a first magnetic core sub-unit, a second magnetic core sub-unit, a magnetic core fixing sub-unit and a magnetic core connecting sub-unit. The magnetic core fixing sub-unit is fixedly connected to the first magnetic core sub-unit, the second magnetic core sub-unit and the magnetic core connecting sub-unit, wherein the magnetic core connecting sub-unit is arranged between the first magnetic core sub-unit and the second magnetic core sub-unit; the coil unit includes a first coil sub-unit and a second coil sub-unit, and the voltage protection unit is connected to the first coil sub-unit and the second coil sub-unit.

[0017] The voltage conversion unit includes a chip MAX5035, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a transistor D1, a first variable resistor R1, a second variable resistor R2 and an inductor L1. Pin 1 of the chip MAX5035 is connected to one end of the first capacitor C1, the other end of the first capacitor C1 is respectively connected to one end of the inductor L1, pin 8 of the chip MAX5035 and the cathode of the transistor D1, the anode of the transistor D1 is grounded, the other end of the inductor L1 is connected to one end of the third capacitor C3, and the other end of the third capacitor C3 is connected to the ground. The first terminal of the MAX5035 chip is connected to the ground, the pin 2 of the chip MAX5035 is connected to one end of the second capacitor C2, the other end of the second capacitor C2 is connected to the pin 3 of the chip MAX5035, the pin 7 of the chip MAX5035 is respectively connected to one end of the second variable resistor R2, one end of the fourth capacitor C4 and the electrical device, the pin 5 of the chip MAX5035 is respectively connected to the other end of the second variable resistor R2 and one end of the first variable resistor R1, and the pin 6 of the chip MAX5035, the other end of the first variable resistor R1 and the other end of the fourth capacitor C4 are all grounded.

[0018] The electromagnetic induction energy harvesting device is fixed to the power transmission line via a fixing unit, and the analysis and control unit is configured to obtain a first electromagnetic induced electromotive force based on the electromagnetic induction energy harvesting device fixed to the power transmission line in the following manner: controlling the processor unit in the electromagnetic induction energy harvesting device to transmit a telescopic control signal to the telescopic unit, so that the telescopic unit controls the magnetic core unit to extend or retract within the first coil sub-unit based on the telescopic control signal, thereby obtaining the first electromagnetic induced electromotive force. The expression of the first electromagnetic induced electromotive force is as follows:

[0019] Wherein, V1 is the first electromagnetic induced electromotive force, N1 is the number of turns of the first coil subunit, μ1 is the magnetic permeability of the first magnetic core subunit, S1 is the equivalent cross-sectional area of ​​the first coil subunit, ω is the angular velocity, i y1 is the effective value of the current of the first coil sub-unit, and L1 is the magnetic path length of the first coil core.

[0020] The analysis and control unit is configured to control the electromagnetic induction energy acquisition device to adaptively control the magnetic core unit to extend or retract within the coil unit based on the first electromagnetic induction electromotive force to obtain a second electromagnetic induction electromotive force by: controlling the electromagnetic induction energy acquisition device to adaptively perform voltage compensation processing based on the first electromagnetic induction electromotive force; the analysis and control unit is configured to control the electromagnetic induction energy acquisition device to adaptively perform voltage compensation processing based on the first electromagnetic induction electromotive force by: controlling the processor unit in the electromagnetic induction energy acquisition device to determine a second coil extension control signal or a second coil retraction control signal based on the coil voltage signal, and transmit the second coil extension control signal or the second coil retraction control signal to the telescopic unit, so that the telescopic unit controls the magnetic core unit to extend or retract within the second coil sub-unit based on the second coil extension control signal or the second coil retraction control signal, and adaptively adjusts to obtain the second electromagnetic induction electromotive force, and the expression of the second electromagnetic induction electromotive force is as follows:

[0021] Wherein, V2 is the second electromagnetic induced electromotive force, N2 is the number of turns of the second coil subunit, μ2 is the magnetic permeability of the second magnetic core subunit, S2 is the equivalent cross-sectional area of ​​the second coil subunit, ω is the angular velocity, i y2 is the effective value of the current of the second coil sub-unit, and L2 is the magnetic path length of the second coil core.

[0022] The analysis and control unit is configured to filter, rectify, and voltage-convert the first electromagnetic induction electromotive force and / or the second electromagnetic induction electromotive force in the following manner to obtain an electromagnetic induction output voltage: when the first electromagnetic induction electromotive force is greater than or equal to the working electromagnetic induction electromotive force, the first electromagnetic induction electromotive force is filtered, rectified, and voltage-converted to obtain the electromagnetic induction output voltage; when the first electromagnetic induction electromotive force is less than the working electromagnetic induction electromotive force, and the second electromagnetic induction electromotive force is greater than or equal to the working electromagnetic induction electromotive force, the first coil subunit is disconnected, and the second electromagnetic induction electromotive force is filtered, rectified, and voltage-converted to obtain the electromagnetic induction output voltage; when the first electromagnetic induction electromotive force is less than the working electromagnetic induction electromotive force, and the second electromagnetic induction electromotive force is also less than the working electromagnetic induction electromotive force, the sum of the first electromagnetic induction electromotive force and the second electromagnetic induction electromotive force is filtered, rectified, and voltage-converted to obtain the electromagnetic induction output voltage.

[0023] The analysis and control unit is configured to select power supply or charging of the electrical device based on the electromagnetic induction output voltage in the following manner: comparing the electromagnetic induction output voltage with a threshold voltage, wherein the expression of the threshold voltage value is as follows:

[0024] Among them, V mis the threshold voltage, R1 is the resistance of the first variable resistor R1 in the voltage conversion unit, R2 is the resistance of the second variable resistor R2 in the voltage conversion unit, V out is a preset output voltage value; power supply or charging is selected based on the voltage comparison result: the selection of power supply or charging based on the voltage comparison result includes: if the electromagnetic induction output voltage is less than the threshold voltage, the electric energy storage unit is charged, or / and the electric energy storage unit is used to power the electrical equipment; if the electromagnetic induction output voltage is greater than or equal to the threshold voltage, the electrical equipment is powered. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] FIG1 is a schematic structural diagram of an electromagnetic induction energy harvesting device provided in an embodiment of the present application;

[0026] FIG2 is a schematic diagram of electrical connections between multiple units in an electromagnetic induction energy harvesting device provided in an embodiment of the present application;

[0027] FIG3 is a circuit structure diagram of a voltage conversion unit provided in an embodiment of the present application;

[0028] FIG4 is a flow chart of a method for adaptively controlling electromagnetic induction energy extraction from a transmission line provided in an embodiment of the present application;

[0029] FIG5 is a schematic diagram showing a connection between an electromagnetic induction energy harvesting device and a power transmission line provided in an embodiment of the present application;

[0030] FIG6 is a schematic structural diagram of a transmission line adaptively controlled electromagnetic induction energy harvesting system provided in an embodiment of the present application.

[0031] The reference numbers in the figure are: 1- telescopic unit, 2- second magnetic core subunit, 3- first magnetic core subunit, 4- magnetic core fixing subunit, 5- first coil subunit, 6- magnetic core connecting subunit, 7- second coil subunit, 101- transmission line, 102- fixing unit, 201- magnetic core unit, 301- voltage protection unit, 401- filtering and rectifying unit, 501- coil unit, 601- voltage conversion unit, 701- processor unit, 10- electromagnetic induction energy acquisition device, 20- analysis and control unit. DETAILED DESCRIPTION

[0032] The present application is described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present application, and provides a detailed implementation method and specific operation process, but the scope of protection of the present application is not limited to the following embodiments.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the art of the present disclosure. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure.

[0034] The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0035] Example 1

[0036] As shown in Figures 1-2 and 5-6, this embodiment provides an electromagnetic induction energy harvesting device 10, including a magnetic core unit 201, a processor unit 701, a voltage protection unit 301, a filtering and rectifying unit 401, a voltage conversion unit 601, a telescopic unit 1 and a coil unit 501.

[0037] In one embodiment, the magnetic core unit 201 is fixedly connected to the telescopic unit 1. The magnetic core unit 201 includes a first magnetic core sub-unit 3, a second magnetic core sub-unit 2, a magnetic core fixing sub-unit 4 and a magnetic core connecting sub-unit 6. The magnetic core fixing sub-unit 4 is fixedly connected to the first magnetic core sub-unit 3, the second magnetic core sub-unit 2 and the connecting sub-unit 6 respectively. The magnetic core connecting sub-unit 6 is arranged between the first magnetic core sub-unit 3 and the second magnetic core sub-unit 2. The magnetic core connecting sub-unit 6 can be a non-magnetic material or an air gap. The magnetic permeability of the first magnetic core sub-unit 3 can be greater than, equal to or less than the magnetic permeability of the second magnetic core sub-unit 2, depending on the actual situation. Other embodiments generated by increasing or decreasing the number of magnetic core sub-units and the number of coil sub-units all fall within the scope of protection of this application.

[0038] In this embodiment, the magnetic core unit 201 and the coil unit 501 are both cylindrical in shape. Because the magnetic core unit 201 is cylindrical, compared to the "sun" shape of a conventional magnetic core structure, it is easier to secure the electromagnetic induction energy harvesting device 10 to the power transmission line 101 using a minimalist fixing structure. Conventional closed-loop electromagnetic induction energy harvesting devices, such as those with a "sun" shape, require the power transmission line to pass through their structure and be secured thereto, resulting in an overly complex fixing structure. In other embodiments, the magnetic core unit 201 and the coil unit 501 may also have other shapes, and other embodiments resulting from these changes in shape fall within the scope of protection of this application.

[0039] The coil unit 501 includes a first coil sub-unit 5 and a second coil sub-unit 7, and the voltage protection unit 301 is connected to the first coil sub-unit 5 and the second coil sub-unit 7. The first coil sub-unit 5 is configured to obtain a first electromagnetic induced electromotive force, and the second coil sub-unit 7 is configured to obtain a second electromagnetic induced electromotive force (for voltage compensation). The number of coil turns of the first coil sub-unit 5 can be greater than, equal to, or less than the number of coil turns of the second coil sub-unit 7, depending on the actual situation. Increasing or decreasing the number of coil sub-units and the number of coil turns of the coil sub-units falls within the protection scope of this application.

[0040] The telescopic unit 1 is configured to control the magnetic core unit 201 to extend or retract within the coil unit 501 based on a telescopic control signal. The telescopic control signal includes an extension control signal and a retraction control signal. The extension control signal includes a first coil extension control signal (for controlling the extension of the first coil sub-unit 5) and a second coil extension control signal (for controlling the extension of the second coil sub-unit 7). The retraction control signal includes a first coil retraction control signal (for controlling the retraction of the first coil sub-unit 5) and a second coil retraction control signal (for controlling the retraction of the second coil sub-unit 7).

[0041] The electrical connection method between multiple units is shown in Figure 2. The processor unit 701 is connected to the telescopic unit 1, the filter and rectifier unit 401 is connected to the voltage protection unit 301 and the voltage conversion unit 601, the voltage protection unit 301 is connected to the coil unit 501, the telescopic unit 1 is fixedly connected to the magnetic core unit 201, the magnetic core unit 201 is arranged in the coil unit 501, the processor unit 701 is configured to transmit a telescopic control signal to the telescopic unit 1, and the telescopic unit 1 is configured to control the magnetic core unit 201 to extend or retract in the coil unit 501 based on the telescopic control signal to obtain electromagnetic induced electromotive force.

[0042] In one embodiment, the electromagnetic induction energy harvesting device 10 further includes an electric energy storage unit.

[0043] In one embodiment, as shown in FIG3 , the voltage conversion unit 601 includes a chip MAX5035, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a transistor D1, a first variable resistor R1, a second variable resistor R2, and an inductor L1. Pin 1 of the chip MAX5035 is connected to one end of the first capacitor C1, and the other end of the first capacitor C1 is connected to one end of the inductor L1, pin 8 of the chip MAX5035, and the cathode of the transistor D1. The anode of the transistor D1 is grounded, and the other end of the inductor L1 is connected to one end of the third capacitor C3. The other end of the capacitor C3 is grounded, pin 2 of the chip MAX5035 is connected to one end of the second capacitor C2, the other end of the second capacitor C2 is connected to pin 3 of the chip MAX5035, pin 7 of the chip MAX5035 is respectively connected to one end of the second variable resistor R2, one end of the fourth capacitor C4, and the electrical device, pin 5 of the chip MAX5035 is respectively connected to the other end of the second variable resistor R2 and one end of the first variable resistor R1, and pin 6 of the chip MAX5035, the other end of the first variable resistor R1, and the other end of the fourth capacitor C4 are all grounded.

[0044] Example 2

[0045] This embodiment provides a method for adaptively controlling electromagnetic induction energy extraction from a transmission line, as shown in FIG4 , including the following steps:

[0046] S101. Obtain a first electromagnetic induction electromotive force based on an electromagnetic induction energy harvesting device fixed to a transmission line.

[0047] S101 includes the following steps:

[0048] 1) As shown in FIG5 , the electromagnetic induction energy harvesting device 10 is fixed to the transmission line 101 by the fixing unit 102 . The structure of the electromagnetic induction energy harvesting device 10 is as described in Example 1 and will not be described in detail in this embodiment.

[0049] 2) Controlling the processor unit 701 in the electromagnetic induction energy harvesting device 10 to transmit a telescopic control signal to the telescopic unit 1, so that the telescopic unit 1 controls the magnetic core unit 201 to extend or retract within the first coil sub-unit 5 based on the telescopic control signal, thereby obtaining a first electromagnetic induced electromotive force.

[0050] The extension and retraction control signals include an extension control signal and a retraction control signal. The extension control signal includes a first coil extension control signal (used to control the extension of the first coil sub-unit 5) and a second coil extension control signal (used to control the extension of the second coil sub-unit 7). The retraction control signal includes a first coil retraction control signal (used to control the retraction of the first coil sub-unit 5) and a second coil retraction control signal (used to control the retraction of the second coil sub-unit 7). The electromagnetic induction energy harvesting device 10 is fixed to the power transmission line 101 via the fixing unit 102. The electromagnetic induction energy harvesting device 10 obtains a first electromagnetic induced electromotive force. That is, based on the first coil extension control signal or the first coil retraction control signal, the first magnetic core sub-unit 3 is controlled to extend or retract within the first coil sub-unit 5 to obtain the first electromagnetic induced electromotive force.

[0051] The first coil extension control signal includes a primary extension control signal, a secondary extension control signal, and a tertiary extension control signal. The processor unit 701 transmits the primary extension control signal, the secondary extension control signal, or the tertiary extension control signal to the telescopic unit 1. The telescopic unit 1 receives the primary extension control signal, the secondary extension control signal, or the tertiary extension control signal transmitted by the processor unit 701. Based on the primary extension control signal, the secondary extension control signal, or the tertiary extension control signal, the telescopic unit 1 controls the extension of the magnetic core unit 201 within the coil unit 501. Specifically, based on the primary extension control signal, the secondary extension control signal, or the tertiary extension control signal, the telescopic unit 1 controls the extension of the first magnetic core sub-unit 3 within the first coil sub-unit 5. The configuration of the second coil extension control signal is similar to that of the first coil extension control signal described above and will not be further described here.

[0052] The retraction control signal includes a primary retraction control signal, a secondary retraction control signal, and a tertiary retraction control signal. The processor unit 701 transmits the primary retraction control signal, the secondary retraction control signal, or the tertiary retraction control signal to the telescopic unit 1. The telescopic unit 1 receives the primary retraction control signal, the secondary retraction control signal, or the tertiary retraction control signal transmitted by the processor unit 701. The telescopic unit 1 controls the degree of retraction of the magnetic core unit 201 within the coil unit 501 based on the primary retraction control signal, the secondary retraction control signal, or the tertiary retraction control signal. That is, the telescopic unit 1 controls the degree of retraction of the first magnetic core subunit 3 within the first coil subunit 5 based on the primary retraction control signal, the secondary retraction control signal, or the tertiary retraction control signal. The setting of the second coil retraction control signal is similar to the first coil retraction control signal described above and will not be repeated here. The number of extension control signals and the number of levels of the retraction control signal can be set according to actual usage. By increasing or decreasing the number of extension control signals and the number of retraction control signals, it falls within the scope of protection of this application.

[0053] The expression of the first electromagnetic induced electromotive force is as follows:

[0054] Wherein, V1 is the first electromagnetic induced electromotive force, N1 is the number of turns of the first coil subunit 5, μ1 is the magnetic permeability of the first magnetic core subunit 3, S1 is the equivalent cross-sectional area of ​​the first coil subunit 5, ω is the angular velocity, i y1 is the effective value of the current of the first coil sub-unit 5, and L1 is the magnetic path length of the first coil core.

[0055] S102: If the first electromagnetic induction electromotive force is smaller than the working electromagnetic induction electromotive force, the electromagnetic induction energy harvesting device is controlled to adaptively control the magnetic core unit to extend or retract in the coil unit based on the first electromagnetic induction electromotive force, thereby obtaining a second electromagnetic induction electromotive force.

[0056] The electromagnetic induction energy harvesting device 10 is controlled and adjusted through the first electromagnetic induction electromotive force, and the second electromagnetic induction electromotive force is obtained based on the second coil sub-unit 7, thereby obtaining the total electromagnetic induction electromotive force. When the total electromagnetic induction electromotive force is greater than or equal to the working electromagnetic induction electromotive force, the working electromagnetic induction electromotive force is the minimum electromotive force that meets the power consumption of the electronic equipment.

[0057] If the first electromagnetic induced electromotive force is less than the working electromagnetic induced electromotive force, the electromagnetic induction energy harvesting device 10 is controlled to adaptively perform voltage compensation processing based on the first electromagnetic induced electromotive force. The processor unit 701 determines the second coil extension control signal or the second coil retraction control signal according to the coil voltage signal, and transmits the second coil extension control signal or the second coil retraction control signal to the telescopic unit 1. The telescopic unit 1 controls the magnetic core unit 201 to extend or retract in the second coil sub-unit 7 based on the second coil extension control signal or the second coil retraction control signal, and adaptively adjusts to obtain the second electromagnetic induced electromotive force.

[0058] The processor unit 701 obtains the voltage signal output by the coil unit 501 and generates an extension control signal or a retraction control signal based on the coil voltage signal and transmits it to the telescopic unit 1. The key to this application lies in "adaptability", that is, the extension or retraction of the magnetic core is adaptive. For example, if the processor unit 701 controls the magnetic core unit 201 to extend or retract within the second coil sub-unit 7, the wire current may change, which may cause the total electromagnetic induction electromotive force to be too large or too small. If the electromagnetic induction electromotive force exceeds the set maximum electromotive force value, the telescopic unit 1 controls the magnetic core unit 201 to retract within the coil unit 501 based on the second coil retraction control signal. If the electromagnetic induction electromotive force is smaller after the magnetic core unit 201 is retracted within the coil unit 501 and does not reach the working voltage, the magnetic core unit 201 is controlled to continue to extend into the coil unit 501. The electromagnetic induction electromotive force is adjusted through a series of adaptive extension and retraction adjustment processes until the total electromagnetic induction electromotive force is greater than or equal to the working electromagnetic induction electromotive force. That is, the extension or retraction control is adaptive and can self-adjust the extension and contraction degree of the magnetic core unit 201 in the coil unit 501 based on the magnitude of the induced electromotive force to output a suitable voltage.

[0059] For example, when the telescopic unit 1 controls the extension of the magnetic core unit 201 within the coil unit 501 based on the primary extension control signal, and the resulting primary electromagnetic induced electromotive force is less than the operating electromagnetic induced electromotive force, the processor unit 701 transmits a secondary extension control signal to the telescopic unit 1. The telescopic unit 1 receives the secondary extension control signal transmitted by the processor unit 701 and controls the magnetic core unit 201 to continue extending within the coil unit 501 based on the secondary extension control signal, thereby generating a secondary electromagnetic induced electromotive force. If the secondary electromagnetic induced electromotive force is still less than the operating electromagnetic induced electromotive force, the processor unit 701 transmits a tertiary extension control signal to the telescopic unit 1. The telescopic unit 1 receives the tertiary extension control signal transmitted by the processor unit 701 and controls the magnetic core unit 201 to continue extending within the coil unit 501 based on the tertiary extension control signal, thereby generating a tertiary electromagnetic induced electromotive force. If the three-level electromagnetic induced electromotive force is still smaller than the working electromagnetic induced electromotive force, the processor unit 701 transmits the second coil extension control signal to the telescopic unit 1. The telescopic unit 1 receives the second coil extension control signal transmitted by the processor unit 701. The telescopic unit 1 controls the magnetic core unit 201 to continue extending within the coil unit 501 based on the multi-level second coil extension control signal until the obtained electromagnetic induced electromotive force is greater than or equal to the working electromagnetic induced electromotive force.

[0060] The expression of the second electromagnetic induced electromotive force is as follows:

[0061] Wherein, V2 is the second electromagnetic induced electromotive force, N2 is the number of turns of the second coil subunit 7, μ2 is the magnetic permeability of the second magnetic core subunit 2, S2 is the equivalent cross-sectional area of ​​the second coil subunit 7, ω is the angular velocity, i y2 is the effective value of the current of the second coil sub-unit 7, and L2 is the magnetic path length of the second coil core.

[0062] S103 , filtering, rectifying, and voltage converting the first electromagnetic induced electromotive force and / or the second electromagnetic induced electromotive force to obtain a stable electromagnetic induced output voltage.

[0063] There are three situations:

[0064] 1. Determine the electromagnetic induction output voltage based on the first electromagnetic induction electromotive force: When the first electromagnetic induction electromotive force is greater than or equal to the working electromagnetic induction electromotive force, that is, no voltage compensation processing is required at this time, and no second electromagnetic induction electromotive force is generated, the first electromagnetic induction electromotive force is directly filtered, rectified and voltage converted to obtain the electromagnetic induction output voltage.

[0065] 2. Determining the electromagnetic induction output voltage based on the second electromagnetic induction electromotive force: When the first electromagnetic induction electromotive force is less than the operating electromagnetic induction electromotive force, voltage compensation processing (step S102) is required. If the generated second electromagnetic induction electromotive force is greater than or equal to the operating electromagnetic induction electromotive force, it indicates that operation can now rely solely on the second electromagnetic induction electromotive force. By disconnecting the first coil subunit, the first electromagnetic induction electromotive force is reduced to zero. Then, the second electromagnetic induction electromotive force is filtered, rectified, and voltage converted to obtain the electromagnetic induction output voltage.

[0066] 3. Determine the electromagnetic induction output voltage based on the first electromagnetic induction electromotive force and the second electromagnetic induction electromotive force: When the first electromagnetic induction electromotive force is less than the working electromagnetic induction electromotive force, it is necessary to perform voltage compensation processing in step S102. During this process, a second electromagnetic induction electromotive force is generated. If the second electromagnetic induction electromotive force is less than the working electromagnetic induction electromotive force, it is impossible to use the second electromagnetic induction electromotive force alone to work. Therefore, it is necessary to use the second electromagnetic induction electromotive force to compensate for the first electromagnetic induction electromotive force (that is, add the two together) to obtain the total electromagnetic induction electromotive force, and perform filtering, rectification and voltage conversion on the total electromagnetic induction electromotive force to obtain the electromagnetic induction output voltage. In this case, in step S102, the magnetic core unit will be adaptively controlled to extend or retract in the second coil unit until the total electromagnetic induction electromotive force is greater than or equal to the working electromagnetic induction electromotive force.

[0067] S104: Selecting to power or charge the electrical device based on the electromagnetic induction output voltage.

[0068] Step S104 includes the following steps:

[0069] 1) Compare the electromagnetic induction output voltage with the threshold voltage.

[0070] In one embodiment, the expression of the threshold voltage value is as follows:

[0071] Among them, V m is the threshold voltage, R1 is the resistance of the first variable resistor R1 in the voltage conversion unit 601, R2 is the resistance of the second variable resistor R2 in the voltage conversion unit 601, V out is the preset output voltage value;

[0072] 2) Selecting to power or charge based on the voltage comparison result: If the electromagnetic induction output voltage is less than the threshold voltage, the electric energy storage unit is charged, and / or the electric energy storage unit is used to power the electrical device; if the electromagnetic induction output voltage is greater than or equal to the threshold voltage, the electrical device is powered.

[0073] This application determines a threshold value based on the first and second variable resistors R1, R2 in the voltage conversion unit 601, and compares it with the electromagnetic induction output voltage. Power supply or charging is selected based on the voltage comparison result. This allows for threshold values ​​to be determined based on different scenarios, rather than fixed preset threshold values, further improving the stability of the output voltage of the electromagnetic induction energy harvesting device 10. Conventional voltage conversion modules perform simple voltage conversion without setting threshold values. This application, through the first and second variable resistors R1, R2, allows for threshold values ​​to be set and adjusted based on actual usage, thereby improving the stability of the output voltage of the electromagnetic induction energy harvesting device 10.

[0074] Example 3

[0075] As shown in FIG1-6 , this embodiment provides a transmission line adaptive control electromagnetic induction energy harvesting system, including:

[0076] The electromagnetic induction energy harvesting device 10 includes a magnetic core unit 201, a processor unit 701, a voltage protection unit 301, a filter and rectifier unit 401, a voltage conversion unit 601, a telescopic unit 1, and a coil unit 501. The processor unit 701 is connected to the telescopic unit 1, the filter and rectifier unit 401 is connected to the voltage protection unit 301 and the voltage conversion unit 601, the voltage protection unit 301 is connected to the coil unit 501, the telescopic unit 1 is fixedly connected to the magnetic core unit 201, the magnetic core unit 201 is arranged in the coil unit 501, the processor unit 701 is configured to transmit a telescopic control signal to the telescopic unit 1, and the telescopic unit 1 is configured to control the magnetic core unit 201 based on the telescopic control signal. The coil unit 501 is extended or retracted to obtain an electromagnetic induced electromotive force; the analysis and control unit 20 is configured to perform the following steps: based on the electromagnetic induction energy acquisition device 10 fixed to the transmission line 101, a first electromagnetic induced electromotive force is obtained; if the first electromagnetic induced electromotive force is less than the working electromagnetic induced electromotive force, the electromagnetic induction energy acquisition device 10 is controlled to adaptively control the magnetic core unit 201 to extend or retract in the coil unit 501 based on the first electromagnetic induced electromotive force to obtain a second electromagnetic induced electromotive force; the first electromagnetic induced electromotive force and / or the second electromagnetic induced electromotive force are filtered, rectified and voltage converted to obtain an electromagnetic induction output voltage; and power supply or charging of the electrical equipment is selected based on the electromagnetic induction output voltage.

[0077] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the structure of the electromagnetic induction energy harvesting device 10 can refer to the content in the aforementioned embodiment 1, and the specific working process of the analysis and control unit 20 described can refer to the corresponding process in the aforementioned method embodiment 2, which will not be repeated here.

[0078] Compared with related technologies, this application can achieve the following effects:

[0079] 1. The present application realizes that an electromagnetic induction energy harvesting device is fixed on a transmission line, and adaptively controls the extension or retraction of a magnetic core unit in a coil unit to obtain electromagnetic induced electromotive force, and selects to supply power or charge electrical equipment.

[0080] 2. The present application determines a threshold value based on the first variable resistor R1 and the second variable resistor R2 in the voltage conversion unit, and compares the voltage with the electromagnetic induction output voltage. Power supply or charging is selected based on the voltage comparison result. The threshold value can be determined according to different scenarios instead of a fixed preset threshold value, which can further improve the stability of the output voltage of the electromagnetic induction energy harvesting device.

[0081] 3. The magnetic core unit and coil unit of the present application are both cylindrical in shape. Compared with the "sun" shape of the traditional magnetic core structure, it is easier to fix the electromagnetic induction energy harvesting device on the transmission line through a very simple fixing structure, and maintenance and installation are more convenient.

[0082] 4. The present application controls the extension and retraction degrees of the magnetic core unit in the coil unit by respectively setting a plurality of extension control signals and a plurality of retraction control signals, thereby improving the stability of the output voltage of the electromagnetic induction energy harvesting device.

[0083] The terms "first", "second" and "third" in the specification of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application described herein can, for example, be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, the process, method, system, product or equipment comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or that are inherent to these processes, methods, products or equipment. In the absence of more restrictions, it is not excluded that there are other identical or equivalent elements in the process, method, product or equipment comprising the elements. For example, if words such as first and second are used to represent names, they do not represent any specific order.

[0084] When an element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intervening element. In addition, the "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc., if there is transmission of electrical signals or data between the connected objects.

[0085] It should be understood that in this application, "at least one (item)" means one or more, and "plurality" means two or more. "And / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0086] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interface, device or unit, which can be electrical, mechanical or other forms.

[0087] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0088] In addition, multiple functional units in the embodiments of the present application may be integrated into one processing unit, or multiple units may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware or software functional units.

[0089] If the integrated unit 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 the present application can essentially be embodied in the form of a software product, which is stored in a storage medium and includes multiple instructions for enabling 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 method described in the embodiment of the present application. The aforementioned storage medium includes: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and other media that can store program codes.

Claims

1. A method for adaptively controlling electromagnetic induction energy extraction from a transmission line, comprising: A first electromagnetic induced electromotive force is obtained based on an electromagnetic induction energy acquisition device fixed to a power transmission line, wherein the electromagnetic induction energy acquisition device includes a magnetic core unit, a processor unit, a voltage protection unit, a filter and rectifier unit, a voltage conversion unit, a telescopic unit, and a coil unit, the processor unit is connected to the telescopic unit, the filter and rectifier unit are respectively connected to the voltage protection unit and the voltage conversion unit, the voltage protection unit is connected to the coil unit, the telescopic unit is fixedly connected to the magnetic core unit, the magnetic core unit is disposed in the coil unit, the processor unit is configured to transmit a telescopic control signal to the telescopic unit, and the telescopic unit is configured to control the magnetic core unit to extend or retract in the coil unit based on the telescopic control signal to obtain the electromagnetic induced electromotive force; In response to the first electromagnetic induced electromotive force being less than the working electromagnetic induced electromotive force, controlling the electromagnetic induction energy acquisition device to adaptively control the magnetic core unit to extend or retract within the coil unit based on the first electromagnetic induced electromotive force, thereby generating a second electromagnetic induced electromotive force; performing filtering, rectification, and voltage conversion processing on at least one of the first electromagnetic induced electromotive force and the second electromagnetic induced electromotive force to obtain an electromagnetic induced output voltage; Power supply or charging processing of the electrical device is selected based on the electromagnetic induction output voltage.

2. The method for adaptively controlling electromagnetic induction energy harvesting through transmission lines according to claim 1, wherein: The magnetic core unit and the coil unit are both cylindrical in shape. The magnetic core unit includes a first magnetic core sub-unit, a second magnetic core sub-unit, a magnetic core fixing sub-unit and a magnetic core connecting sub-unit. The magnetic core fixing sub-unit is fixedly connected to the first magnetic core sub-unit, the second magnetic core sub-unit and the magnetic core connecting sub-unit, wherein the magnetic core connecting sub-unit is arranged between the first magnetic core sub-unit and the second magnetic core sub-unit; the coil unit includes a first coil sub-unit and a second coil sub-unit, and the voltage protection unit is connected to the first coil sub-unit and the second coil sub-unit.

3. The method for adaptively controlling electromagnetic induction energy harvesting through transmission lines according to claim 2, wherein: The electromagnetic induction energy acquisition device is fixed to the transmission line through a fixing unit, and the electromagnetic induction energy acquisition device fixed to the transmission line acquires a first electromagnetic induced electromotive force, including: The processor unit in the electromagnetic induction energy harvesting device is controlled to transmit a telescopic control signal to the telescopic unit, so that the telescopic unit controls the magnetic core unit to extend or retract within the first coil sub-unit based on the telescopic control signal, thereby obtaining a first electromagnetic induced electromotive force. The expression of the first electromagnetic induced electromotive force is as follows: Wherein, V1 is the first electromagnetic induced electromotive force, N1 is the number of turns of the first coil subunit, μ1 is the magnetic permeability of the first magnetic core subunit, S1 is the equivalent cross-sectional area of ​​the first coil subunit, ω is the angular velocity, i y1 is the effective value of the current of the first coil subunit, L1 is the magnetic core of the first coil Magnetic path length.

4. The method for adaptively controlling electromagnetic induction energy harvesting through transmission lines according to claim 2, wherein: The controlling the electromagnetic induction energy obtaining device to adaptively control the magnetic core unit to extend or retract within the coil unit based on the first electromagnetic induction electromotive force to obtain a second electromagnetic induction electromotive force includes: Controlling the electromagnetic induction energy harvesting device to adaptively perform voltage compensation processing based on the first electromagnetic induction electromotive force; The controlling the electromagnetic induction energy harvesting device to adaptively perform voltage compensation processing based on the first electromagnetic induction electromotive force includes: The processor unit in the electromagnetic induction energy harvesting device is controlled to determine a second coil extension control signal or a second coil retraction control signal based on the coil voltage signal, and transmit the second coil extension control signal or the second coil retraction control signal to the telescopic unit, so that the telescopic unit controls the magnetic core unit to extend or retract within the second coil sub-unit based on the second coil extension control signal or the second coil retraction control signal, and adaptively adjusts to obtain the second electromagnetic induced electromotive force. The expression of the second electromagnetic induced electromotive force is as follows: Wherein, V2 is the second electromagnetic induced electromotive force, N2 is the number of turns of the second coil subunit, μ2 is the magnetic permeability of the second magnetic core subunit, S2 is the equivalent cross-sectional area of ​​the second coil subunit, ω is the angular velocity, i y2 is the effective value of the current of the second coil sub-unit, and L2 is the magnetic path length of the second coil core.

5. The method for adaptively controlling electromagnetic induction energy harvesting through transmission lines according to claim 2, wherein: The filtering, rectifying, and voltage conversion processing of at least one of the first electromagnetic induced electromotive force and the second electromagnetic induced electromotive force to obtain an electromagnetic induced output voltage includes: In response to the first electromagnetic induced electromotive force being greater than or equal to the working electromagnetic induced electromotive force, filtering, rectifying and voltage converting the first electromagnetic induced electromotive force to obtain the electromagnetic induced output voltage; In response to the first electromagnetic induced electromotive force being less than the working electromagnetic induced electromotive force and the second electromagnetic induced electromotive force being greater than or equal to the working electromagnetic induced electromotive force, disconnecting the first coil subunit, filtering, rectifying, and voltage converting the second electromagnetic induced electromotive force to obtain the electromagnetic induced output voltage; In response to the first electromagnetic induced electromotive force being smaller than the working electromagnetic induced electromotive force, and the second electromagnetic induced electromotive force also being smaller than the working electromagnetic induced electromotive force, filtering, rectifying, and voltage conversion are performed on the sum of the first electromagnetic induced electromotive force and the second electromagnetic induced electromotive force to obtain the electromagnetic induced output voltage.

6. The method for adaptively controlling electromagnetic induction energy harvesting through transmission lines according to claim 1, wherein: The selecting of power supply or charging of an electric device based on the electromagnetic induction output voltage includes: Comparing the electromagnetic induction output voltage with a threshold voltage; Selecting to supply power or charge based on the voltage comparison result; The selecting of power supply or charging based on the voltage comparison result includes: In response to the electromagnetic induction output voltage being less than the threshold voltage, at least one of the following is performed: charging the electric energy storage unit; supplying power to the electric device by the electric energy storage unit; In response to the electromagnetic induction output voltage being greater than or equal to the threshold voltage, power supply processing for the electric device is performed.

7. A transmission line adaptive control electromagnetic induction energy harvesting system, comprising an electromagnetic induction energy harvesting device (10) and an analysis and control unit (20), wherein: The electromagnetic induction energy acquisition device (10) comprises a magnetic core unit (201), a processor unit (701), a voltage protection unit (301), a filtering and rectifying unit (401), a voltage conversion unit (601), a telescopic unit (1) and a coil unit (501), wherein the processor unit (701) is connected to the telescopic unit (1), the filtering and rectifying unit (401) is connected to the voltage protection unit (301) and the voltage conversion unit (601), the voltage protection unit (301) is connected to the coil unit (501), the telescopic unit (1) is fixedly connected to the magnetic core unit (201), the magnetic core unit (201) is arranged in the coil unit (501), the processor unit (701) is arranged to transmit a telescopic control signal to the telescopic unit (1), and the telescopic unit (1) is arranged to control the magnetic core unit (201) to extend or retract in the coil unit (501) based on the telescopic control signal, so as to obtain electromagnetic induced electromotive force; The analysis and control unit (20) is configured to obtain the first electromagnetic induction electromotive force based on the electromagnetic induction energy acquisition device (10) fixed to the transmission line (101); in response to the first electromagnetic induction electromotive force being less than the working electromagnetic induction electromotive force, control the electromagnetic induction energy acquisition device (10) to adaptively control the magnetic core unit (201) to extend or retract within the coil unit (501) based on the first electromagnetic induction electromotive force, thereby obtaining a second electromagnetic induction electromotive force; perform filtering, rectification, and voltage conversion processing on at least one of the first electromagnetic induction electromotive force and the second electromagnetic induction electromotive force, thereby obtaining an electromagnetic induction output voltage; and select power supply or charging processing for an electrical device based on the electromagnetic induction output voltage.

8. The transmission line adaptive control electromagnetic induction energy harvesting system according to claim 7, wherein: The magnetic core unit (201) and the coil unit (501) are both cylindrical in shape. The magnetic core unit (201) comprises a first magnetic core subunit (3) and a second magnetic core subunit (2), a magnetic core fixing subunit (4) and a magnetic core connecting subunit (6). The magnetic core fixing connecting subunit (4) is fixedly connected to the first magnetic core subunit (3), the second magnetic core subunit (2) and the magnetic core connecting subunit (6), wherein the magnetic core connecting subunit (6) is arranged between the first magnetic core subunit (3) and the second magnetic core subunit (2). The coil unit (502) comprises a first coil subunit (5) and a second coil subunit (7), and the voltage protection unit (301) is connected to the first coil subunit (5) and the second coil subunit (7).

9. The transmission line adaptive control electromagnetic induction energy harvesting system according to claim 7, wherein: The voltage conversion unit (601) includes a chip MAX5035, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a transistor D1, a first variable resistor R1, a second variable resistor R2 and an inductor L1, wherein the pin 1 end of the chip MAX5035 is connected to one end of the first capacitor C1, the other end of the first capacitor C1 is respectively connected to one end of the inductor L1, the pin 8 end of the chip MAX5035 and the cathode of the transistor D1, the anode of the transistor D1 is grounded, the other end of the inductor L1 is connected to one end of the third capacitor C3, and the cathode of the third capacitor C3 is grounded. The other end is grounded, pin 2 of the chip MAX5035 is connected to one end of the second capacitor C2, the other end of the capacitor C2 is connected to pin 3 of the chip MAX5035, pin 7 of the chip MAX5035 is respectively connected to one end of the second variable resistor R2, one end of the fourth capacitor C4 and the electrical device, pin 5 of the chip MAX5035 is respectively connected to the other end of the second variable resistor R2 and one end of the first variable resistor R1, and pin 6 of the chip MAX5035, the other end of the first variable resistor R1 and the other end of the fourth capacitor C4 are all grounded.

10. The transmission line adaptive control electromagnetic induction energy harvesting system according to claim 8, wherein: The electromagnetic induction energy acquisition device (10) is fixed to the power transmission line (101) via a fixing unit (102), and the analysis and control unit (20) is configured to acquire a first electromagnetic induced electromotive force based on the electromagnetic induction energy acquisition device (10) fixed to the power transmission line (101) in the following manner: The processor unit (701) in the electromagnetic induction energy harvesting device (10) is controlled to transmit a telescopic control signal to the telescopic unit (1), so that the telescopic unit (1) controls the magnetic core unit (201) to extend or retract within the first coil sub-unit (5) based on the telescopic control signal, thereby obtaining a first electromagnetic induced electromotive force, wherein the expression of the first electromagnetic induced electromotive force is as follows: Wherein, V1 is the first electromagnetic induced electromotive force, N1 is the number of turns of the first coil subunit (5), μ1 is the magnetic permeability of the first magnetic core subunit (3), S1 is the equivalent cross-sectional area of ​​the first coil subunit (5), ω is the angular velocity, i y1 is the effective value of the current of the first coil subunit (5), and L1 is the magnetic path length of the first coil core.

11. The transmission line adaptive control electromagnetic induction energy harvesting system according to claim 8, wherein: The analysis and control unit (20) is configured to control the electromagnetic induction energy harvesting device (10) in the following manner to adaptively control the magnetic core unit (201) to extend or retract within the coil unit (501) based on the first electromagnetic induction electromotive force, thereby obtaining a second electromagnetic induction electromotive force: Controlling the electromagnetic induction energy harvesting device (10) to adaptively perform voltage compensation processing based on the first electromagnetic induction electromotive force; The analysis and control unit (20) is configured to control the electromagnetic induction energy harvesting device (10) to adaptively perform voltage compensation processing based on the first electromagnetic induction electromotive force in the following manner: The processor unit (701) in the electromagnetic induction energy harvesting device (10) is controlled to determine a second coil extension control signal or a second coil retraction control signal according to a coil voltage signal, and transmit the second coil extension control signal or the second coil retraction control signal to the telescopic unit (1), so that the telescopic unit (1) controls the magnetic core unit (201) to extend or retract within the second coil sub-unit (7) based on the second coil extension control signal or the second coil retraction control signal, and adaptively adjusts to obtain the second electromagnetic induced electromotive force, wherein the expression of the second electromagnetic induced electromotive force is as follows: Wherein, V2 is the second electromagnetic induced electromotive force, N2 is the number of coil turns of the second coil subunit (7), μ2 is the magnetic permeability of the second magnetic core subunit (2), S2 is the equivalent cross-sectional area of ​​the second coil subunit (7), ω is the angular velocity, i y2 is the effective value of the current of the second coil subunit (7), and L2 is the magnetic path length of the second coil core.

12. The transmission line adaptive control electromagnetic induction energy harvesting system according to claim 8, wherein: The analysis and control unit (20) is configured to perform filtering, rectification, and voltage conversion processing on at least one of the first electromagnetic induced electromotive force and the second electromagnetic induced electromotive force in the following manner to obtain an electromagnetic induced output voltage: In response to the first electromagnetic induced electromotive force being greater than or equal to the working electromagnetic induced electromotive force, filtering, rectifying and voltage converting the first electromagnetic induced electromotive force to obtain the electromagnetic induced output voltage; In response to the first electromagnetic induced electromotive force being less than the working electromagnetic induced electromotive force and the second electromagnetic induced electromotive force being greater than or equal to the working electromagnetic induced electromotive force, disconnecting the first coil subunit (5), filtering, rectifying and voltage converting the second electromagnetic induced electromotive force to obtain the electromagnetic induced output voltage; In response to the first electromagnetic induced electromotive force being smaller than the working electromagnetic induced electromotive force and the second electromagnetic induced electromotive force also being smaller than the working electromagnetic induced electromotive force, filtering, rectifying and voltage conversion are performed on the sum of the first electromagnetic induced electromotive force and the second electromagnetic induced electromotive force to obtain the electromagnetic induced output voltage.

13. The transmission line adaptive control electromagnetic induction energy harvesting system according to claim 9, wherein: The analysis and control unit (20) is configured to select power supply or charging processing for the electrical device based on the electromagnetic induction output voltage in the following manner: The electromagnetic induction output voltage is compared with a threshold voltage, wherein the expression of the threshold voltage value is as follows: Among them, V m is the threshold voltage, R1 is the resistance value of the first variable resistor R1 in the voltage conversion unit (601), R2 is the resistance value of the second variable resistor R2 in the voltage conversion unit (601), V out is the preset output voltage value; Selecting to supply power or charge based on the voltage comparison result; The selecting of power supply or charging based on the voltage comparison result includes: In response to the electromagnetic induction output voltage being less than the threshold voltage, at least one of the following is performed: charging the electric energy storage unit; supplying power to the electric device by the electric energy storage unit; In response to the electromagnetic induction output voltage being greater than or equal to the threshold voltage, power supply processing for the electric device is performed.

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