A non-hoop vertical magnetic field induction power taking device design method and energy supply system

Abstract

This invention discloses a design method and power supply system for a non-clamped vertical magnetic field induction energy harvesting device. The method includes analyzing the constraints between the output characteristics of the energy harvesting device and its parameters, transmission line current, and connected load parameters using a block-superimposed magnetic flux calculation method, deriving an analytical expression for the maximum output power of the energy harvesting device; employing a dimension-reduced distributed performance parameter optimization method to analyze the maximum output power of the vertical magnetic field induction energy harvesting device when it is located at the optimal energy harvesting position, and designing the energy harvesting device structure; and introducing X-axis and Y-axis rotation matrices and Z-axis and Y-axis offset parameters to analyze the fluctuation of the maximum output power of the energy harvesting device under offset and rotation conditions. This invention improves the installation freedom, scenario applicability, and anti-saturation capability of the magnetic field induction energy harvesting device, and can replace the empirical columnar energy harvesting device in its prototype development. It fills the research gap in the mechanism and performance optimization theory of non-clamped vertical magnetic field induction energy harvesting, and has practical value and guiding significance.

Description

Technical Field

[0001] This invention relates to magnetic field induction energy harvesting and supply technology, and particularly to a design method and power supply system for a non-clamped vertical magnetic field induction energy harvesting device. Background Technology

[0002] As the power grid enters the digital transformation stage, a large number of wireless load current sensing devices are deployed at key nodes to ensure the safe and stable operation of transmission and transformation lines. However, the problem of their energy source urgently needs to be solved. Currently, some sensing elements use natural environmental energy for power supply, but natural environmental energy has problems such as difficulty in obtaining initial energy sources or the energy harvesting performance being greatly affected by the local environment, making it difficult to guarantee the reliability of power supply. Magnetic field induction energy harvesting has the advantages of abundant energy, wide distribution, and stable field source, making it one of the stable energy sources for wireless low-power sensing devices. Magnetic field induction energy harvesting technology has become a current research hotspot.

[0003] While ring-type magnetic field induction power harvesting devices offer high power density, they suffer from core saturation under high current conditions. This leads to heat generation, noise, and high-voltage spikes in the harvesting core, significantly limiting the development of magnetic field induction power harvesting technology. In contrast, non-closed-loop induction power harvesting devices, due to their high saturation characteristics, can withstand currents in the hundreds of amperes, but their output power is drastically reduced. With the current trend towards minimizing power consumption in wireless sensors and communication transmission methods, non-closed-loop magnetic field induction power harvesting devices can support intermittent operation. In particular, current research on non-clamped vertical magnetic field induction power harvesting devices is limited, lacking precise theoretical support for their output characteristics. Comprehensive system-level optimization analysis of vertical magnetic field induction devices is also lacking. Furthermore, unlike ring-type devices, horizontal and vertical offsets or multi-angle installations of non-clamped vertical devices can affect their power harvesting performance, and no reports on the impact of these effects have been found in existing literature. Summary of the Invention

[0004] Purpose of the invention: One purpose of this invention is to provide a design method for a non-clamping vertical magnetic field induction energy harvesting device, which collects magnetic field energy around transmission lines to power a wireless sensor system, thereby significantly improving the anti-saturation capability, bus current tolerance, and installation freedom of the magnetic field induction energy harvesting device.

[0005] Another objective of this invention is to provide a non-clamping vertical magnetic field induction power supply system.

[0006] Technical solution: The present invention provides a design method for a non-clamping vertical magnetic field induction energy harvesting device, comprising the following steps:

[0007] S1. The block superposition magnetic flux calculation method is used to analyze the constraint relationship between the output power of the energy harvesting device and the structural dimensions of the energy harvesting device, the number of turns of the energy harvesting winding, the permeability of the energy harvesting core, the transmission line current and the connected load parameters, and to obtain the analytical expression of the maximum output power of the energy harvesting device; wherein, the initial coordinate system of the energy harvesting device is O-XYZ.

[0008] S2. Using a dimensionality-reduced distributed performance parameter optimization method, the maximum output power of the vertical magnetic field induction energy harvesting device when it is located at the optimal energy harvesting position is analyzed. After fixing the height of the energy harvesting magnetic core, the cross-sectional size of the energy harvesting magnetic core, the connected load, and the transmission line current, the influence of the number of turns of the energy harvesting winding on the maximum output power of the energy harvesting device is analyzed. After selecting the optimal number of turns N of the energy harvesting winding, the influence of the winding method on the maximum output power of the energy harvesting device is further analyzed. The winding method is to decompose the number of turns N of the energy harvesting winding into N... i Circle and N j Layered winding, and N = N i ×N j After selecting the optimal winding method, other parameters are kept fixed to analyze the influence of the energy harvesting core height on the maximum output power of the energy harvesting device. If the trend is linear, a suitable energy harvesting core height is selected according to the usage scenario and the power required by the load. Furthermore, finite element analysis software is used to study the influence of the size of the central through hole of the vertical magnetic core on the maximum output power of the energy harvesting device. Finally, the relationship between the volume ratio of the vertical magnetic field induction energy harvesting device before and after adding the through hole and the change in the maximum output power of the energy harvesting device is obtained. Finally, the through hole size is selected according to the self-weight or portability requirements of the energy harvesting device and the power required by the load.

[0009] S3. In the analytical formula for the maximum output power of the energy harvesting device obtained in step S1, the X-axis rotation matrix A1, the Y-axis rotation matrix A2, the longitudinal offset parameter △z, and the lateral offset parameter △y are introduced to analyze the fluctuation of the maximum output power of the non-clamped vertical magnetic field induction energy harvesting device under the offset and rotation conditions. The coordinate system of the energy harvesting device after rotation is OX′Y′Z′.

[0010] Furthermore, step S1 specifically includes:

[0011] Using a block-superimposed flux calculation method, the area enclosed by the i-th turn and j-th layer of the coil is divided into five parts: the cross-sectional area of ​​the energy-harvesting core and the cross-sectional area of ​​the energy-harvesting winding, which is divided into four parts by the tangent of the cylindrical core along the X-axis. The cross-sectional area of ​​the energy-harvesting core is S4, the cross-sectional area of ​​the winding closest to the transmission line is S1, the two identical cross-sectional areas parallel to the energy-harvesting core along the X-axis are S2 and S2', and the cross-sectional area of ​​the winding farthest from the transmission line is S3. Φ s1 Φ is the magnetic flux flowing through the air with a cross-sectional area S1 between the energy harvesting winding and the energy harvesting core. s2 Φ is the magnetic flux flowing through the air with a cross-sectional area S2 or S2' between the energy harvesting winding and the energy harvesting core. s3Φ is the magnetic flux flowing through the air with a cross-sectional area S3 between the energy harvesting winding and the energy harvesting core. s4 For the magnetic flux flowing through the cross-sectional area S4 of the energy harvesting core, the total magnetic flux Φ flowing through the i-th turn and j-th layer of the energy harvesting winding is... ij (t) is represented as:

[0012] Φ ij (t)=∫ S B P cosθdS=Φ s1 (t)+2Φ s2 (t)+Φ s3 (t)+Φ s4 (t)

[0013] Among them, B p Let B be the magnetic flux density at point P, and θ be the magnetic flux density at point P. p The angle between the vector and the Z-axis, where P is a point inside the j-th layer of the coil in the YZ plane;

[0014] Then take the open-circuit induced voltage U of the energy winding. oc (t) is represented as:

[0015]

[0016] Where N1 is the number of turns of the energy harvesting winding, i is the i-th turn of the energy harvesting winding, N2 is the number of layers of the energy harvesting winding, and j is the j-th layer of the energy harvesting winding;

[0017] Under resonant conditions, neglecting the additional coil resistance caused by eddy current effects in non-high-frequency operating environments, the coil resistance value R is taken as... w Represented as:

[0018]

[0019] Where ρ is the resistivity of the energy harvesting winding coil, S is the cross-sectional area of ​​the energy harvesting winding coil, r1 is the outer radius of the hollow cylindrical energy harvesting device, and d is the diameter of the energy harvesting winding coil.

[0020] The output power P of the energy harvesting device is:

[0021]

[0022] According to the maximum power transfer theorem, when the resistance of the connected load is R L With winding resistance R w When the power is consistent, the power obtained is the maximum, and the maximum output power P of the energy harvesting device is the maximum. max Represented as:

[0023]

[0024] Among them, R LThis is the resistance value of the connected load.

[0025] Furthermore, Φ s1 (t), Φ s2 (t), Φ s3 (t) and Φ s4 The expressions for (t) are as follows:

[0026]

[0027] Where m1 is the horizontal distance of the transmission line from the origin O, the origin O is the center point of the energy harvesting device, μ0 is the free magnetic permeability, I1(t) is the magnitude of the current flowing through the transmission line, and μ e The intrinsic permeability of the energy-harvesting core is given by y, where y is the distance from any point P on the core to the X-axis of the core coordinate system.

[0028] The selection of m1 is subject to the following constraints:

[0029] m1≥(N2d+r1+D / 2)

[0030] Where D is the radial length of the energy harvesting core;

[0031] Intrinsic permeability of energy harvesting core μ r Let δ = h / 2r1, where h is the height of the energy-harvesting core cylinder. Different values ​​of δ correspond to different values ​​of k, as follows:

[0032]

[0033] Furthermore, step S2 specifically includes:

[0034] The influence of the number of turns in the energy harvesting winding on the maximum output power of the energy harvesting device is analyzed: The number of turns in the energy harvesting winding directly affects the induced voltage of the energy harvesting winding. The induced voltage increases with the increase of the number of turns. Therefore, when the number of turns is taken to the limit, the maximum output power of the energy harvesting device reaches the optimal value. At this time, the energy harvesting winding is the optimal number of turns. The influence of the winding method on the maximum output power of the energy harvesting device is also analyzed: Under the same number of turns but different winding methods, the maximum output power of the energy harvesting device deviates. Moreover, as the number of coil turns increases, the maximum output power in both simulation and numerical calculation shows a trend of first increasing and then decreasing. Therefore, when the energy harvesting core is perpendicular to the transmission line and the center point is on the same horizontal axis as the line center point, the extreme cases of full-core winding or mainly horizontal stacking winding are eliminated. The winding method is used to obtain a better maximum output power. The influence of the energy harvesting core height on the maximum output power of the energy harvesting device is analyzed: the maximum output power of the energy harvesting device is positively correlated with the core height, and the trend is linear. In the scenario where the load resistance is always less than the coil internal resistance, the maximum height allowed by the scenario is selected to obtain the maximum output power. The influence of the through hole size of the vertical core on the maximum output power of the energy harvesting device: as the through hole radius increases, the volume ratio of the through hole energy harvesting device to the original energy harvesting device gradually decreases, and the maximum output power of the energy harvesting device continues to decrease. When the energy harvesting core is completely removed, the maximum output power of the energy harvesting device drops sharply. Therefore, the through hole size is selected according to the self-weight or portability requirements of the energy harvesting device and the power required by the load.

[0035] Furthermore, step S3 specifically includes the following steps:

[0036] First, we analyze the impact of lateral or longitudinal offset on energy harvesting performance. The magnetic fluxes corresponding to the offset of the energy harvesting device in the positive Y-axis and Z-axis directions are:

[0037]

[0038] Where, Φ s ′1(t),Φ s ′2(t), Φ s ′3(t) and Φ s ′4(t) correspond to Φ after the energy harvesting device is offset in the positive Y-axis and Z-axis directions, respectively. s1 (t), Φ s2 (t), Φ s3 (t) and Φ s4 The changing magnetic flux Φ(t) corresponds to Φ. s4 (t) represents the magnetic flux flowing through the cross-sectional area of ​​the energy extraction core, Φ s1 (t), Φ s2 (t) and Φ s3(t) represents the magnetic flux flowing through the cross-sectional areas S1, S2 or S2', S3 between the energy harvesting winding and the energy harvesting core, respectively. S1, S2, S2', and S3 are the cross-sectional areas of the energy harvesting winding divided into four parts by the tangent along the X-axis of the cylindrical core. S1 is the cross-sectional area of ​​the winding closest to the transmission line, S2 and S2' are two identical cross-sectional areas parallel to the energy harvesting core along the X-axis, and S3 is the cross-sectional area of ​​the winding farthest from the transmission line. A j (y) is the rotation matrix of the energy harvesting device rotating counterclockwise around the coordinate axis; Δy and Δz are the offsets of the energy harvesting device in the positive directions of the Y and Z axes, respectively; m1 is the horizontal distance of the transmission line from the origin O, where the origin O is the center point of the energy harvesting device; μ0 is the permeability of free space; I1(t) is the magnitude of the current flowing through the transmission line; μ e r1 is the intrinsic permeability of the energy harvesting core; r1 is the outer radius of the hollow cylindrical energy harvesting device; and d is the coil diameter of the energy harvesting winding.

[0039] If the coil plane is located on the positive half-axis of the Z-axis, Δz±jd takes a "+" sign in each expression; if the coil plane is located on the negative half-axis of the Z-axis, Δz±jd takes a "-" sign in each expression. A rotation matrix is ​​introduced to analyze the energy harvesting device. The rotation matrices for the counterclockwise rotation of the energy harvesting device around the X-axis and Y-axis are A1 and A2, respectively:

[0040]

[0041] Where, θ x and θ y These are the rotation angles of the columnar induction energy harvesting device around the X-axis and Y-axis, respectively.

[0042] Furthermore, the transformation formula Φ′ of the variables is... ij (t)=Φ′ s1 (t)+2Φ′ s2 (t)+Φ′ s3 (t)+Φ′ s4 (t) Substituting into the following energy harvesting characteristic model, we can obtain the maximum output power P′ of the energy harvesting device under the condition of offset and rotation:

[0043]

[0044] Among them, U′ oc (t) is the output voltage after the energy harvesting device is deflected and rotated, Φ′ ij (t) is the corresponding magnetic flux after the energy harvesting device is deflected and rotated, R L N1 represents the resistance of the connected load, i represents the number of turns of the power extraction winding, N2 represents the number of layers of the power extraction winding, and j represents the j-th layer of the power extraction winding.

[0045] Furthermore, the energy harvesting device rotates around the X-axis, and the rotation angle is affected by the distance between the energy harvesting magnetic core and the transmission line. The rotatable angle of the magnetic core can be divided into three cases:

[0046] Case 1: When the height of the energy harvesting core cylinder meets the requirements Under certain conditions, the rotation angle of the magnetic core is unrestricted;

[0047] Case 2: In the YZ coordinate system, the height of the energy harvesting core cylinder satisfies At this time, the rotation angle of the magnetic core is limited, and the rotatable angle in the (0~π / 2) interval can be divided into two segments, which are: and

[0048] Case 3: In the Y′Z′ coordinate system, when the height of the energy-harvesting core cylinder satisfies h>2(m1-D / 2), the rotation angle of the core is still limited. The rotatable angle in the range of (0~90°) is only one interval, which is (0,arccos[(D / 2+r1) / m1]).

[0049] The present invention discloses a non-clamping vertical magnetic field induction energy harvesting device, which includes an energy harvesting magnetic core and an energy harvesting winding wound on the energy harvesting magnetic core. The energy harvesting device is installed on one side of the transmission line and is used to collect magnetic field energy around the transmission line, serving as a wireless sensor system function; the energy harvesting device is designed using the above-mentioned method.

[0050] This invention discloses a non-clamped vertical magnetic field induction power supply system, comprising a non-clamped vertical magnetic field induction power harvesting device, an energy management module, a wireless sensor, and a microcontroller. The non-clamped vertical magnetic field induction power harvesting device is designed using the method described in any one of claims 1-6. A resonant thin-film capacitor C1 is connected in series between the power harvesting winding of the non-clamped vertical magnetic field induction power harvesting device and the energy management module. The energy management module is used to store and manage the magnetic field induction energy. A Zener diode and an energy storage capacitor C2 are connected in parallel to the energy management module. The Zener diode provides voltage regulation protection for the energy storage capacitor connected to the energy management module. The energy output terminal of the energy management module is connected in parallel with the microcontroller chip, the wireless sensor, and the power supply terminal of the communication module connected to the microcontroller. The microcontroller chip packages and processes the sensing signal output by the wireless sensor and transmits it to the communication module, which then transmits it to the monitoring terminal.

[0051] Preferably, the capacitance value of the resonant thin film capacitor is... f represents the frequency, L represents the inductance of the energy extraction winding; the energy management module includes the LTC3588-1 energy management chip and peripheral circuitry; the capacitance of the energy storage capacitor is... t is the time required for one complete sensing data transmission, p is the number of times the complete sensing data is transmitted, p≥1, U + and U -These are the discharge voltage and charging voltage of the energy storage capacitor set by the energy management chip, P total This refers to the total power dissipated by wireless sensors, microcontrollers, and communication modules.

[0052] The present invention provides a design method for a non-clamped vertical magnetic field induction power supply system, comprising the following steps:

[0053] (1) Optimized design of non-clamping vertical magnetic field induction energy harvesting device: Design a non-clamping vertical magnetic field induction energy harvesting device according to any one of claims 1-6;

[0054] (2) Power supply circuit design, including:

[0055] Select wireless sensor: Select a wireless sensor that can transmit data intermittently in non-real-time mode, and the communication method is a low-power medium-to-long-distance communication method.

[0056] Design of an energy management module: An energy management module is designed using the LTC3588-1 energy management chip and peripheral circuitry;

[0057] A resonant thin-film capacitor C1 is connected in series between the energy harvesting winding and the energy management circuit of the non-clamped vertical magnetic field induction energy harvesting device. The capacitance value of the resonant capacitor is... f is the frequency, and L is the inductance of the energy extraction winding.

[0058] A Zener diode and energy storage capacitor C2 are connected in parallel on the energy management module. The capacitance value of the energy storage capacitor is... t is the time required for one complete sensing data transmission, p is the number of times the complete sensing data is transmitted, p≥1, U + and U - These are the discharge voltage and charging voltage of the energy storage capacitor set by the energy management chip, P total The total power dissipated by wireless sensors, microcontrollers, and communication modules;

[0059] The energy output terminal of the energy management chip is connected in parallel with the power supply terminals of the microcontroller chip, wireless sensor, and communication module.

[0060] The microcontroller chip packages and processes the sensing signals output by the wireless sensor and transmits them to the communication module.

[0061] Beneficial effects: Compared with the prior art, the significant technical effects of the present invention are: (1) The energy harvesting device adopts a non-clamping vertical magnetic field energy harvesting structure, which improves the installation freedom and multi-scenario applicability of the magnetic field induction energy harvesting device; (2) Based on the block superposition magnetic flux calculation method, the output external characteristics of the vertical energy harvesting magnetic core are accurately analyzed, and the stray parameters of the vertical induction energy harvesting device are optimized in a step-by-step manner in a dimension reduction manner. It can replace the empirical columnar energy harvesting device and fill the research gap in the energy harvesting mechanism and performance optimization theory of the non-clamping vertical magnetic field induction energy harvesting device. It has practical value and guiding significance. Attached Figure Description

[0062] Figure 1 This is a flowchart of the energy harvesting device optimization design method of the present invention;

[0063] Figure 2 This is a schematic diagram of a non-clamping type vertical magnetic field induction energy harvesting device; where (a) is a schematic diagram of the location of the energy harvesting device, and (b) is a schematic diagram of the ideal arrangement of the energy harvesting windings.

[0064] Figure 3 The diagram shows the rotation angle of a non-clamping vertical magnetic field induction energy harvesting device, where (a) is a diagram of the energy harvesting device rotating counterclockwise around the X-axis, and (b) is a diagram of the energy harvesting device rotating counterclockwise around the Y-axis.

[0065] Figure 4 This is a schematic diagram of a non-clamping vertical magnetic field induction energy harvesting device rotating around the X-axis in the YZ plane.

[0066] Figure 5 This describes the output characteristics of the energy harvesting device of the present invention under offset conditions;

[0067] Figure 6 This refers to the change in energy harvesting performance of the energy harvesting device of the present invention when it rotates around the Y-axis;

[0068] Figure 7 This refers to the change in energy harvesting performance of the energy harvesting device of the present invention when it rotates around the X-axis;

[0069] Figure 8 This is a schematic diagram of the power supply system structure of the present invention. Detailed Implementation

[0070] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0071] The non-clamped vertical columnar magnetic field induction energy harvesting device of the present invention includes an energy harvesting magnetic core and an energy harvesting winding wound on the energy harvesting magnetic core. The energy harvesting magnetic core does not need to be a high-permeability magnetic core. The energy harvesting magnetic core can be a columnar or cuboid vertical magnetic core. The energy harvesting winding is a multi-layer dense winding wound on the energy harvesting magnetic core. When harvesting energy, the energy harvesting device is set on one side of the transmission line to collect the magnetic field energy around the transmission line and power the wireless sensor system. The optimal energy harvesting position is that the longitudinal centerline of the non-clamped vertical magnetic field induction energy harvesting device (hereinafter referred to as the energy harvesting device) is perpendicular to the transmission line, and the transverse centerline is in the same plane as the centerline of the transmission line.

[0072] In this embodiment, a cylindrical vertical magnetic core is used as an example for describing the energy harvesting core. Figure 1 As shown, the design method of the non-clamping vertical magnetic field induction energy harvesting device of the present invention includes the following steps:

[0073] S1. First, the block superposition magnetic flux calculation method is used to analyze the constraint relationship between the output power of the energy harvesting device and the structural dimensions of the energy harvesting device, the number of turns of the energy harvesting winding, the permeability of the energy harvesting core, the transmission line current and the connected load parameters, and obtain the analytical expression of the maximum output power of the energy harvesting device.

[0074] like Figure 2 As shown in (a), O-XYZ is the initial coordinate system of the energy harvesting device, with the origin O being the center point of the energy harvesting device. The energy harvesting device is set on one side of the transmission line, parallel to the X-axis and perpendicular to the Y-axis, with the Z-axis being the central axis of the energy harvesting device. Let m1 be the horizontal distance of the transmission line from the origin O. The selection of m1 is subject to the following constraints:

[0075] m1≥(N2d+r1+D / 2) (1)

[0076] Where N2 is the number of layers of the energy extraction winding, d is the coil diameter of the energy extraction winding, r1 is the outer radius of the hollow cylindrical vertical magnetic core, and D is the path length of the transmission line.

[0077] The ideal winding arrangement of the energy-collecting winding is as follows: Figure 2 As shown in (b). The total number of turns N of the energy harvesting winding is decomposed into N1 turns and N2 layers, i.e., N = N1 × N2. To simplify the analysis, in this embodiment, the inner radius r2 of the hollow cylindrical energy harvesting device is set to 0, and the area enclosed by the i-th turn and j-th layer of coil is divided into five parts: the cross-sectional area of ​​the energy harvesting magnetic core and the cross-sectional area of ​​the energy harvesting winding divided into four parts by the tangent of the cylindrical magnetic core along the X-axis direction. Among them, the cross-sectional area of ​​the energy harvesting magnetic core is S4, the cross-sectional area of ​​the winding closest to the transmission line is S1, the two identical cross-sectional areas parallel to the energy harvesting magnetic core in the X-axis direction are S2 and S2', and the cross-sectional area of ​​the winding farthest from the transmission line is S3. s1 (t) represents the magnetic flux in the air flowing through the cross-sectional area S1 between the energy harvesting winding and the energy harvesting core, Φs2 (t) represents the magnetic flux flowing through the air with a cross-sectional area S2 or S2' between the energy harvesting winding and the energy harvesting core, Φ s3 (t) represents the magnetic flux in the air flowing through the cross-sectional area S3 between the energy harvesting winding and the energy harvesting core, Φ s4 (t) represents the magnetic flux flowing through the cross-sectional area S4 of the energy extraction core. Using a block-superposition magnetic flux calculation method, the total magnetic flux Φ flowing through the i-th turn and j-th layer of the energy extraction winding is... ij (t) is represented as:

[0078] Φ ij (t)=∫ S B P cosθdS=Φ s1 (t)+2Φ s2 (t)+Φ s3 (t)+Φ s4 (t) (2)

[0079] Among them, B p Let B be the magnetic flux density at point P, and θ be the magnetic flux density at point P. p The vector makes an angle with the Z-axis, P is a point inside the j-th layer of the coil in the YZ plane, and Φ s1 (t), Φ s2 (t), Φ s3 (t) and Φ s4 (t) are respectively represented as:

[0080]

[0081] Where μ0 is the free permeability, I1(t) is the magnitude of the current flowing through the transmission line, y is the distance from any point P on the magnetic core to the X-axis of the magnetic core coordinate system, and μ e To the intrinsic permeability of the energy harvesting core, and μ r Let δ = h / 2r1, where h is the height of the energy-harvesting core cylinder. Different values ​​of δ corresponding to different values ​​of k can be expressed as:

[0082]

[0083] Unlike ring-type magnetic field harvesting devices, cylindrical harvesting devices have relatively low sensitivity to the intrinsic permeability of the magnetic core. Therefore, to avoid resource waste or cost savings, it is not necessary to use a high-permeability magnetic core as the magnetic guiding material for non-clamped magnetic field induction harvesting devices. The open-circuit induced voltage of the harvesting winding is then expressed as:

[0084]

[0085] Where i is the i-th turn of the energy harvesting winding, and j is the j-th layer of the energy harvesting winding;

[0086] Therefore, in the case of resonance, i.e. Where L is the inductance of the energy extraction winding, C is the resonant capacitance, ω is the angular frequency, and the additional coil resistance caused by eddy current effects under non-high-frequency operating conditions is ignored. The resistance of the secondary winding (i.e., the energy extraction winding) is R. w Represented as:

[0087]

[0088] Wherein, ρ is the resistivity of the energy extraction winding coil. In this invention, the energy extraction winding is a copper coil with a resistivity of 0.0172 Ω·mm. 2 / m, S is the cross-sectional area of ​​the energy harvesting winding, and the output power P of the energy harvesting device is:

[0089]

[0090] Furthermore, according to the maximum power transfer theorem, when the resistance of the connected load is R... L When the resistance of the energy harvesting winding is the same, the output power of the energy harvesting device is the maximum, and the maximum output power P of the energy harvesting device is the maximum. max Represented as:

[0091]

[0092] Among them, R L This is the resistance value of the connected load.

[0093] S2. Secondly, a dimensionality-reduced distributed performance parameter optimization method is adopted to analyze the maximum output power of the vertical magnetic field induction energy harvesting device when it is directly opposite the transmission line (i.e., the optimal energy harvesting position). After fixing the height of the energy harvesting core, the cross-sectional size of the energy harvesting core, the connected load, and the transmission line current, the influence of the number of turns of the energy harvesting winding on the maximum output power of the energy harvesting device is analyzed. The number of turns of the energy harvesting winding directly affects the induced voltage of the energy harvesting winding. The induced energy harvesting voltage increases with the increase of the number of turns. Therefore, when the number of turns is taken to the limit, the maximum output power of the energy harvesting device reaches the optimal value. At this time, the energy harvesting winding has the optimal number of turns. After selecting the optimal number of turns N of the energy harvesting winding, the influence of the winding method on the maximum output power of the energy harvesting device is further analyzed. The winding method decomposes the number of turns N of the energy harvesting winding into N i Circle and N j Layered winding, and N = N i ×N jWith the same number of turns but different winding methods, the maximum output power of the energy harvesting device varies. Furthermore, as the number of coil turns increases, both the simulated and numerical calculations show a trend of first increasing and then decreasing the maximum output power. Therefore, when the energy harvesting core is perpendicular to the transmission line and its center point is on the same horizontal axis as the line center point, extreme winding methods such as full-core winding or horizontally stacked winding should be avoided to obtain a better maximum output power. After selecting the optimal winding method, the influence of the energy harvesting core height on the maximum output power of the energy harvesting device is analyzed while keeping other parameters constant. The maximum output power of the energy harvesting device is positively correlated with the core height, and the trend is linear. This is particularly relevant in scenarios where the load resistance is always less than the coil internal resistance. The maximum output power can be obtained at the maximum height allowed by the scenario. Furthermore, finite element analysis software can be used to study the influence of the size of the central through hole of the vertical magnetic core on the maximum output power of the energy harvesting device. The central through hole of the energy harvesting magnetic core penetrates the vertical magnetic core, and the cross-section of the through hole can be circular or square, etc. Finally, the relationship between the volume ratio of the vertical magnetic field induction energy harvesting device before and after adding the through hole and the change in energy harvesting power is obtained. As the radius of the through hole increases, the volume ratio of the through hole energy harvesting device to the original energy harvesting device gradually decreases, and the maximum output power of the energy harvesting device continues to decrease. When the energy harvesting magnetic core is completely removed, the maximum output power of the energy harvesting device drops sharply. Therefore, the through hole size can be selected according to the self-weight or portability requirements of the energy harvesting device and the power required by the load.

[0094] S3. Considering the high degree of freedom in the installation of the non-clamped vertical magnetic field induction energy harvesting device, the installation method, installation distance, or installation angle can be freely selected according to the application scenario. Analyze the maximum output power of the high-degree-of-freedom vertical magnetic field induction energy harvesting device and the attenuation when it deviates from the transmission line. Considering the infinite transmission line length and symmetry, in the analytical formula of step S1 (i.e., formula (8)), for U oc Formula (3) for calculating magnetic flux introduces X-axis rotation matrix A1, Y-axis rotation matrix A2, longitudinal offset parameter Δz, and lateral offset parameter Δy to analyze the maximum output power fluctuation of the non-clamped vertical magnetic field induction energy harvesting device under offset and rotation conditions. A1 and A2 represent... Where θ x and θ y These represent the rotation angles of the columnar induction energy harvesting device around the X and Y axes, respectively.

[0095] Due to limited mobility, the positional deviation of the ring-type magnetic field induction energy harvesting device has minimal impact on its energy harvesting performance. However, non-clamped vertical energy harvesting devices may experience lateral or longitudinal offsets during installation, tilt under external forces, or be unable to be installed ideally due to environmental factors, such as the bottom surface of the non-clamped vertical induction energy harvesting device being on the same plane as the transmission line. Therefore, further research is needed on the impact of positional differences on the energy harvesting performance of columnar energy harvesting devices. Figure 3As shown in (a) and (b), the influence of lateral or longitudinal offset on energy harvesting performance is first analyzed. Let Δy and Δz be the offsets of the energy harvesting device in the positive Y-axis and Z-axis directions, respectively, and the changes in magnetic flux are as follows:

[0096]

[0097] Where, Φ s ′1(t),Φ s ′2(t), Φ s ′3(t) and Φ s ′4(t) correspond to Φ after the energy harvesting device is offset in the positive Y-axis and Z-axis directions, respectively. s1 (t), Φ s2 (t), Φ s3 (t) and Φ s4 The changing magnetic flux corresponding to (t), A j (y) is the rotation matrix of the energy harvesting device rotating counterclockwise around the coordinate axis;

[0098] If the coil plane is located on the positive half-axis of the Z-axis, Δz±jd takes a "+" sign in each expression; if the coil plane is located on the negative half-axis of the Z-axis, Δz±jd takes a "-" sign in each expression. A rotation matrix is ​​introduced to analyze this energy harvesting device. Figure 3 Figures (a) and (b) show schematic diagrams of the energy harvesting device rotating counterclockwise around the X and Y axes, respectively. OX′Y′Z′ represents the coordinate system after rotation. The rotation matrices for the counterclockwise rotation of the energy harvesting device around the X and Y axes are set as A1 and A2, respectively, and their expressions are as follows:

[0099]

[0100] Furthermore, the transformation formula Φ of the variables can be... ij ′(t)=Φ s ′1(t)+2Φ s ′2(t)+Φ s ′3(t)+Φ s Substituting ′4(t) into the following energy harvesting characteristic model:

[0101]

[0102] Among them, U o ′ c (t) is the output voltage after the energy harvesting device is deflected and rotated, Φ ij ′(t) is the corresponding magnetic flux after the energy harvesting device is deflected and rotated. The maximum output power P′ under the condition that the energy harvesting device is deflected and rotated is obtained.

[0103] It is worth noting that there is an angle limitation when the non-clamped vertical magnetic field energy harvesting device rotates around the X-axis. Figure 4This indicates that if the energy harvesting device rotates around the X-axis, the rotation angle is affected by the distance between the energy harvesting magnetic core and the transmission line. The rotation angle of the magnetic core can be mainly divided into three cases.

[0104] Case 1: When the height of the energy harvesting core cylinder meets the requirements Under certain conditions, the rotation angle of the magnetic core is unrestricted;

[0105] Case 2: In the YZ coordinate system, the core height At this time, the rotation angle of the magnetic core is limited, and the rotatable angle in the (0~π / 2) interval can be divided into two segments, which are: and

[0106] Case 3: In the Y′Z′ coordinate system, when the core height h > 2(m1-D / 2), the core rotation angle is still limited. The rotatable angle in the range of (0 to 90°) is only one interval, which is (0, arccos[(D / 2+r1) / m1]).

[0107] A dimensionality-reduced distributed performance parameter optimization method was employed, and finite element analysis software was used to study and analyze the energy harvesting power of a vertical magnetic field induction energy harvesting device under conditions of displacement or rotation (i.e., non-optimal position). Figure 5 , Figure 6 and Figure 7 The figures represent the performance changes of the magnetic core offset, the magnetic core rotation around the Y-axis, and the magnetic core rotation around the X-axis, respectively. The maximum output power of the energy harvesting device gradually decreases as the longitudinal offset increases, while there is an optimal value for the maximum output power as the lateral offset increases. As the rotation angle increases, the output power drops significantly. Therefore, when there is no lateral offset, the energy harvesting device should be placed as close as possible to the transmission line. When there is a lateral offset, there is an optimal longitudinal distance for the energy harvesting device to obtain the maximum output power. At the same time, the energy harvesting device should avoid excessive tilting in the given position.

[0108] like Figure 8 As shown, an energy supply system includes a non-clamped vertical magnetic field induction energy harvesting device, an energy management module, a wireless sensor, and a microcontroller. The non-clamped vertical magnetic field induction energy harvesting device is designed according to the above-described design method. A resonant thin-film capacitor C1 is connected in series between the energy harvesting winding of the non-clamped vertical magnetic field induction energy harvesting device and the energy management module. The capacitance value of the resonant thin-film capacitor is... L represents the inductance of the energy extraction winding. The energy management module includes an LTC3588-1 energy management chip and peripheral circuitry to store and manage the energy induced by the magnetic field. A Zener diode and energy storage capacitor C2 are connected in parallel to the energy management module. The Zener diode provides voltage regulation protection for the energy storage capacitor connected to the energy management module. The energy management chip offers four output voltages: 3.6V, 3.3V, 2.5V, and 1.8V. The energy output terminal of the energy management chip is connected in parallel to the power supply terminal of the microcontroller's microcontroller chip, the wireless sensor, and the communication module connected to the microcontroller. The microcontroller chip packages and processes the sensing signal output from the wireless sensor and transmits it to the communication module. To ensure at least one complete wireless data transmission, the energy output of the energy storage capacitor equipped with the energy management chip must be at least equal to the energy dissipated during one complete wireless data transmission. Therefore, the capacitance value of the energy storage capacitor is... t is the time required for one complete sensing data transmission, p (p≥1) is the number of times the complete sensing data is transmitted, and U + and U - These are the discharge voltage and charging voltage of the energy storage capacitor set by the energy management chip, P total This refers to the total power dissipated by the wireless sensors, microcontroller, and communication module. The final data sensed by the wireless sensors is received by the monitoring terminal.

[0109] Wireless sensors can transmit data such as temperature, humidity, current, and angle in a non-real-time, intermittent manner. Communication methods include, but are not limited to, low-power, long-distance communication methods such as LoRa.

[0110] The present invention provides a design method for a non-clamped vertical magnetic field induction power supply system, comprising the following steps:

[0111] (1) Optimization design of non-clamped vertical magnetic field induction energy harvesting device; The specific design method is designed according to the above-mentioned optimization design method of non-clamped vertical magnetic field induction energy harvesting device.

[0112] (2) Power supply circuit design; including:

[0113] Wireless sensors can be non-real-time, intermittent wireless sensors that transmit data such as temperature, humidity, current, and angle. Communication methods include, but are not limited to, low-power, long-distance communication methods such as LoRa.

[0114] In the non-clamping vertical magnetic field induction energy harvesting device, a resonant thin-film capacitor C1 is connected in series between the energy harvesting winding and the energy management circuit. The capacitance value of the resonant capacitor is... L represents the inductance of the energy extraction winding. The energy management unit includes an LTC3588-1 energy management chip and peripheral circuitry to store and manage the energy induced by the magnetic field. The energy management circuit has a Zener diode and an energy storage capacitor C2 connected in parallel. The Zener diode provides voltage regulation protection for the energy management circuit connected to the energy storage capacitor. The energy management chip offers four selectable output voltages: 3.6V, 3.3V, 2.5V, and 1.8V. The energy output terminal of the energy management chip is connected in parallel with the power supply terminals of the microcontroller chip, wireless sensor, and communication module. The microcontroller chip packages and processes the sensing signal output from the wireless sensor and transmits it to the communication module. The capacitance value of the energy storage capacitor is... t is the time required for one complete sensing data transmission, p (p≥1) is the number of times the complete sensing data is transmitted, and U + and U - These are the discharge voltage and charging voltage of the energy storage capacitor set by the energy management chip, P total This refers to the total power dissipated by wireless sensors, microcontrollers, and communication modules.

Claims

1. A method of designing a non-clamp, vertical magnetic field induction power supply device, characterized by, Comprise the following steps: S1, using block superposition type magnetic flux calculation method analyzes the power output of the power taking device and the power taking device structure size, the number of turns of the power taking winding, the magnetic permeability of the power taking magnetic core, the current of the power transmission line and the access load parameter, obtains the maximum output power analytical expression of the power taking device; wherein, the initial coordinate system of the power taking device is O-XYZ; S2, using dimension reduction distributed performance parameter optimization method, analyzing the maximum output power of vertical magnetic field induction power supply device at the optimal power supply position, fixing the power supply magnetic core height, power supply magnetic core cross-sectional size, accessing load and power line current, analyzing the influence of power supply winding turns on the maximum output power of power supply device, selecting the optimal power supply winding turns N, further analyzing the influence of winding method on the maximum output power of power supply device, the winding method is to decompose the power supply winding turns N into N i turns and N j layer winding, and N=N i ×N j ; after selecting the optimal winding method, still fixing other parameters to analyze the influence of power supply magnetic core height on the maximum output power of power supply device, if the trend is linear, select the appropriate power supply magnetic core height according to the use scene and the required power of load; further, using finite element analysis software to study the influence of vertical magnetic core center hole size on the maximum output power of power supply device, finally get the volume ratio of vertical magnetic field induction power supply device before and after adding hole and the change relationship of the maximum output power of power supply device, finally select the hole size according to the weight or lightness requirement of power supply device and the required power of load; S3, the maximum output power analytical expression of the power taking device obtained in step S1 is introduced into X axis rotation matrix A1, Y axis rotation matrix A2, longitudinal offset parameter△z and transverse offset parameter△y, the maximum output power fluctuation of the non-holding magnetic field induction power taking device under the condition of offset and rotation is analyzed, and the coordinate system of the power taking device after rotation is O-X'Y'Z'.

2. The method of claim 1, wherein the non-holding clamp vertical magnetic field induction power supply device is characterized in that, Step S1 specifically comprises: The area surrounded by the i-th coil of the j-th layer is divided into five parts by using the block superposition method: the cross-sectional area of the energy-taking magnetic core and the tangent of the cross-sectional area of the energy-taking magnetic core along the X-axis direction are divided into four parts, and the cross-sectional area of the energy-taking winding is divided into two parts. Among them, the cross-sectional area of the energy-taking magnetic core is S4, the cross-sectional area of the winding closest to the power transmission line is S1, the cross-sectional area of the two identical parts parallel to the X-axis direction of the energy-taking magnetic core is S2 and S2', the cross-sectional area of the winding farthest from the power transmission line is S3, and Φ s1 Φ1 is the magnetic flux flowing through the air between the energy-taking winding and the cross-sectional area S1 of the energy-taking magnetic core, s2 Φ2 is the magnetic flux flowing through the air between the energy-taking winding and the cross-sectional area S2 or S2' of the energy-taking magnetic core, s3 Φ3 is the magnetic flux flowing through the air between the energy-taking winding and the cross-sectional area S3 of the energy-taking magnetic core, and s4 Φ4 is the magnetic flux flowing through the cross-sectional area S4 of the energy-taking magnetic core. Then, the total magnetic flux Φi,j flowing through the i-th coil of the j-th layer of the energy-taking winding is ij (t) is represented as: Φ ij (t) = ∫ S B P cos θ dS = Φ s1 (t) + 2Φ s2 (t) + Φ s3 (t) + Φ s4 (t) Wherein, B p B is the magnetic induction intensity of point P, θ is the angle between the magnetic induction intensity B p The angle between the vector and the Z axis, P is a point in the jth layer coil of the YZ plane; U = 4.44 f Nφmax oc (t) is represented as: Wherein, N1 is the number of turns of the power taking winding, i is the i-th turn of the power taking winding, N2 is the number of layers of the power taking winding, and j is the j-th layer of the power taking winding; In the resonant case, the additional resistance of the coil due to eddy current effect in the non-high frequency working environment is ignored, and the resistance R of the power taking winding is taken w is represented as: Wherein, ρ is the resistivity of the power taking winding coil, S is the cross-sectional area of the power taking winding coil, r1 is the outer radius of the hollow cylindrical power taking device, and d is the diameter of the power taking winding coil; The output power P of the power taking device is: From the maximum power transfer theorem, when the load resistance R L is equal to the winding resistance R w , the resulting power is maximum, and the maximum output power P max of the power pickup device is represented as: wherein R L is the load resistance value for the access.

3. The method of claim 2, wherein the method is characterized by: Φ s1 (t), Φ s2 (t), Φ s3 (t) and Φ s4 (t) are respectively: Wherein, m1 is the horizontal distance of the power transmission line from the coordinate origin O, the coordinate origin O is the center point of the power taking device, μ0 is the vacuum permeability, I1(t) is the current size of the power transmission line, μ e is the intrinsic permeability of the power taking magnetic core, and y is the distance from any point P on the magnetic core to the X-axis of the magnetic core coordinate. The selection of m1 has the following constraint conditions: m1≥(N2d+r1+D / 2) Wherein, D is the radial length of the power taking magnetic core; Intrinsic permeability of a power supply core μ r The relative permeability of the power supply core is μr, k is the demagnetization factor, 0 < k < 1, let δ = h / 2r1, h is the height of the power supply core cylinder, and k corresponding to different δ is expressed as:

4. The non-clamp vertical magnetic field induction power supply device design method according to claim 1, characterized in that, Step S2 specifically comprises: The influence of the number of turns of the power taking winding on the maximum output power of the power taking device is analyzed: the number of turns of the power taking winding directly affects the induced voltage of the power taking winding, and the induced voltage increases with the increase of the number of turns, therefore, when the number of turns reaches the limit value, the maximum output power of the power taking device reaches the optimal value, at this time, the power taking winding is the optimal number of turns; The influence of the winding method on the maximum output power of the power taking device is analyzed: under the same number of turns but different winding methods, the maximum output power of the power taking device exists deviation, and with the increase of the number of turns, the maximum output power of simulation and numerical calculation presents the trend of first increasing and then decreasing, therefore, when the power taking magnetic core is perpendicular to the power transmission line and the center point is horizontally aligned with the center point of the line, the extreme winding method of laying full magnetic core or mainly using transverse superposition is abandoned, so as to obtain the optimal maximum output power; The influence of the height of the power taking magnetic core on the maximum output power of the power taking device is analyzed: the maximum output power of the power taking device is positively correlated with the height of the magnetic core, and the change trend is linear, in the scene where the load access resistance value is always less than the coil resistance, the maximum height allowed by the scene is obtained to obtain the maximum output power; The influence of the size of the vertical magnetic core central through hole on the maximum output power of the power taking device: with the increase of the through hole radius, the volume ratio of the through hole power taking device to the original power taking device gradually decreases, and the maximum output power of the power taking device continuously decreases, when the maximum output power of the power taking device after completely removing the power taking magnetic core sharply decreases, therefore, the through hole size is selected according to the weight or lightness requirement of the power taking device and the required power of the load.

5. The non-clamp stand magnetic field induction power supply device design method according to claim 1, characterized in that, Step S3 specifically comprises the following steps: First, analyze the influence of transverse or longitudinal offset on the power taking performance, the corresponding magnetic flux of the power taking device after offset in the positive direction of Y axis and Z axis is: wherein, Φ s ′1(t), Φ s ′2(t), Φ s ′3(t) and Φ s ′4(t) correspond to the change of magnetic flux, Φ s1 (t), Φ s2 (t), Φ s3 (t) and Φ s4 (t) respectively, Φ s4 (t) is the magnetic flux flowing through the cross-sectional area of the energy-taking magnetic core, Φ s1 (t), Φ s2 (t) and Φ s3 (t) are the magnetic fluxes in the air flowing through the cross-sectional area S1, S2 or S2', S3 between the energy-taking winding and the energy-taking magnetic core, S1, S2, S2', S3 are the cross-sectional areas of the energy-taking winding divided into four parts by the tangent of the cylindrical magnetic core along the X-axis direction, S1 is the cross-sectional area of the winding closest to the power transmission line, S2 and S2' are two identical cross-sectional areas parallel to the energy-taking magnetic core in the X-axis direction, S3 is the cross-sectional area of the winding farthest from the power transmission line, A j (y) is the rotation matrix of the energy-taking device rotating counterclockwise around the coordinate axis; Δy and Δz are the offsets of the energy-taking device in the positive direction of the Y-axis and the Z-axis respectively; m1 is the horizontal distance of the power transmission line from the coordinate origin O, which is the center point of the energy-taking device, μ0 is the magnetic permeability of vacuum, I1(t) is the current flowing through the power transmission line, μ e is the intrinsic magnetic permeability of the energy-taking magnetic core; r1 is the outer radius of the hollow cylindrical energy-taking device, and d is the coil diameter of the energy-taking winding. The "+ " is taken in each expression of △z±jd, the "- " is taken in each expression of △z±jd when the coil plane is located at the negative half axis of the Z axis, a rotation matrix is introduced to analyze the power taking device, the rotation matrixes of the power taking device rotating counterclockwise around the X axis and the Y axis are A1 and A2 respectively: wherein θ x and θ y are the rotation angles of the cylindrical inductive power pickup device around the X-axis and the Y-axis, respectively. Further, the transformation of the variables Φ ij ′(t) = Φ s ′1(t) + 2Φ s ′2(t) + Φ s ′3(t) + Φ s ′4(t) into the following power extraction model to obtain the maximum output power P' of the power extraction device under the conditions of the power extraction device offset and rotation: Wherein, U o c (t) is the output voltage of the energy-harvesting device after rotation offset, Φ ij (t) is the corresponding magnetic flux of the energy-harvesting device after rotation offset, R L is the resistance value of the connected load, N1 is the number of turns of the energy-harvesting winding, i is the i-th turn of the energy-harvesting winding, N2 is the number of layers of the energy-harvesting winding, and j is the j-th layer of the energy-harvesting winding.​ 6. The non-clamp vertical magnetic field induction power supply device design method according to claim 5, wherein, The power taking device rotates around the X axis, the rotation angle is affected by the distance between the power taking magnetic core and the power transmission line, and the rotatable angle of the magnetic core can be divided into three cases: Case 1: When the height of the energy-taking magnetic core cylinder satisfies the condition, the rotation angle of the magnetic core is not limited; Case 2: In YZ coordinate system, the height of the energy-taking magnetic core cylinder satisfies When the magnetic core rotation angle is limited, and the rotatable angle in the interval (0~π / 2) can be divided into two intervals, which are and Case 3: In the Y'Z' coordinate system, when the cylindrical height of the power taking magnetic core satisfies h>2(m1-D / 2), the rotatable angle of the magnetic core is still limited, and the rotatable angle in (0~90°) is only an interval, which is (0,arccos[(D / 2+r1) / m1]).

7. A non-clamp, stand-alone magnetic field induction power supply device, characterized by, The device comprises a power taking magnetic core and a power taking winding wound on the power taking magnetic core, the power taking device is arranged on one side of the power transmission line, and is used for collecting the magnetic field energy around the power transmission line to realize the function of the wireless sensor system; the power taking device is designed by using the method in any one of claims 1-6.

8. A non-hooping vertical magnetic field induction power supply system, characterized by, The device comprises a non-hooping vertical magnetic field induction power taking device, an energy management module, a wireless sensor and a microcontroller, the non-hooping vertical magnetic field induction power taking device is designed by using the method in any one of claims 1-6, a resonance film capacitor C1 is connected in series between the power taking winding of the non-hooping vertical magnetic field induction power taking device and the energy management module, the energy management module is used for realizing storage and management of the magnetic field induction energy, a voltage stabilizing tube and an energy storage capacitor C2 are connected in parallel to the energy management module, the voltage stabilizing tube realizes voltage stabilizing protection of the energy management module connected to the energy storage capacitor; an energy output end of the energy management module is connected in parallel to a micro control chip of the microcontroller, a power supply end of a communication module connected to the wireless sensor and the microcontroller; the micro control chip packs and processes sensing signals output by the wireless sensor and transmits the sensing signals to the communication module, and the communication module transmits the sensing signals to a monitoring terminal.

9. A non-clamp vertical magnetic field induction power supply system according to claim 8, characterized in that, Resonant thin film capacitor capacitance value f is frequency, L is the energy taking winding inductance; the energy management module includes LTC3588-1 energy management chip and peripheral circuit; the energy storage capacitor capacity value t is the time required for a complete sensing data, p is the number of complete sensing data transmission, p≥1, U + and U - respectively the energy storage capacitor discharge voltage and the energy storage capacitor charging voltage set by the energy management chip, P total The total power dissipated by the wireless sensor, microcontroller and communication module.

10. A non-cage vertical magnetic field induction power supply system design method, characterized by, The device comprises the following steps: (1) Optimal design of the non-hooping vertical magnetic field induction power taking device: the non-hooping vertical magnetic field induction power taking device is designed according to the method in any one of claims 1-6; (2) Design of the energy supply circuit, comprising: Selecting a wireless sensor: selecting a non-real time intermittent data transmission wireless sensor, and selecting a micro-power consumption long-distance communication mode as the communication mode; Designing an energy management module: designing the energy management module by using an LTC3588-1 energy management chip and a peripheral circuit; A resonant thin film capacitor C1 is connected in series between the energy taking winding of the non-holding clamp vertical magnetic field induction power taking device and the energy management circuit, and the resonant capacitor has a capacitance value f is the frequency, and L is the inductance of the energy taking winding. A voltage stabilizing tube and an energy storage capacitor C2 are connected in parallel on the energy management module, and the energy storage capacitor has a capacitance t is the time required for a complete sensing data, p is the number of complete sensing data transmission, p≥1, U + and U - are the energy storage capacitor discharge voltage and the energy storage capacitor charging voltage set by the energy management chip respectively, P total is the total power dissipated by the wireless sensor, the microcontroller and the communication module; An energy output end of the energy management chip is connected in parallel to a micro control chip of the microcontroller, a wireless sensor and a power supply end of a communication module; The micro control chip packs and processes sensing signals output by the wireless sensor and transmits the sensing signals to the communication module.

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