Magnetic information acquisition sensor and magnetic information acquisition equipment

Abstract

The present invention provides a magnetic information acquisition sensor and a magnetic information acquisition device, comprising: a butterfly body structure and two groups of butterfly wing structures, the butterfly body structure comprising a long hollow frame and a coil wound on the outer surface of the hollow frame, each group of butterfly wing structures comprising N butterfly wing rings, wherein N is an integer greater than or equal to 1; the material of the butterfly wing structure is a material with a magnetic resistance less than a preset value; the hollow frame has a hollow through hole passing through both ends of the hollow frame; the first end of each butterfly wing ring penetrates the hollow through hole from the first end of the hollow through hole, and the second end of each butterfly wing ring penetrates the hollow through hole from the second end of the hollow through hole; the butterfly body structure can generate a corresponding electromagnetic field when power is input to the coil, and the magnetic flux of the electromagnetic field can be guided by the butterfly wing ring.

Description

Technical Field

[0001] The present invention relates to the field of sensors, and in particular to a magnetic information acquisition sensor and a magnetic information acquisition device. Background Art

[0002] In the field of sensors, devices that use the physical properties of magnetic fields to achieve information exchange or feature quantity collection can be called magnetic or magnetic sensors.

[0003] In traditional magnetic sensors, directional detection is usually used to detect the characteristic information emitted by the target. As a result, only the magnetic field entering the sensor in one or certain directions can be detected, which can easily lead to information loss and make it difficult to ensure the accuracy and completeness of information collection. Summary of the invention

[0004] The present invention provides a magnetic information omnidirectional acquisition sensor and a magnetic information acquisition device to solve the problem of information loss.

[0005] According to a first aspect of the present invention, a magnetic information acquisition sensor is provided, comprising: a butterfly body structure and two groups of butterfly wing structures, wherein the butterfly body structure comprises a long hollow frame and a coil wound on the outer surface of the hollow frame, and each group of butterfly wing structures comprises N butterfly wing rings, wherein N is an integer greater than or equal to 1; the material of the butterfly wing structure is a material having a magnetic resistance less than a preset value;

[0006] The hollow frame has hollow through holes penetrating through both ends of the hollow frame; the first end of each butterfly wing ring penetrates into the hollow through hole from the first end of the hollow through hole, and the second end of each butterfly wing ring penetrates into the hollow through hole from the second end of the hollow through hole;

[0007] The butterfly body structure can generate a corresponding electromagnetic field when power is input into the coil, and the magnetic flux of the electromagnetic field can be guided by the butterfly wing ring.

[0008] Optionally, each butterfly wing ring includes a first penetration section, a second penetration section and a bending section;

[0009] The first penetration section is located in the hollow through hole and at the first end of the hollow through hole, the second penetration section is located in the hollow through hole and at the second end of the hollow through hole, the curved section is located outside the hollow skeleton, the first penetration section is connected to the first end of the curved section, and the second penetration section is connected to the second end of the curved section; the center of curvature of each part of the curved section is located on the side of the curved section opposite to the hollow skeleton.

[0010] Optionally, the curved shape of the curved segment matches the shape of the magnetic flux lines of the butterfly structure.

[0011] Optionally, the magnetic information acquisition sensor further includes a central magnetic conductive structure, which is arranged at the center of the hollow through hole, and both ends of the central magnetic conductive structure extend outside the hollow through hole along the length direction of the hollow through hole, so that the magnetic flux at the corresponding position of the electromagnetic field can be guided by the central magnetic conductive structure.

[0012] Optionally, the butterfly wing structure is made of nanocrystalline ribbon material.

[0013] Optionally, the two groups of butterfly wing structures are symmetrical about the longitudinal section of the hollow skeleton.

[0014] Optionally, the coil is a single coil, and the starting end and the knotting end of the coil are both located at the same end of the hollow skeleton.

[0015] Optionally, if N is greater than or equal to 2, then: the lengths of different butterfly wing rings in the same butterfly wing structure are increased in sequence, wherein:

[0016] The head end of the first butterfly wing ring is fixed in the hollow through hole, and the tail end of the last butterfly wing ring is also fixed in the hollow through hole;

[0017] Except for the first butterfly wing ring, the head end of each butterfly wing ring is fixedly connected to the tail end of the previous butterfly wing ring, and each butterfly wing ring is located outside the previous butterfly wing ring.

[0018] According to a second aspect of the present invention, there is provided a magnetic information acquisition device, comprising a data processing module and the magnetic information acquisition sensor involved in the first aspect and its optional solutions;

[0019] When the power supply is input into the coil and the external magnetic field enters the butterfly wing structure, the electrical parameter change information of the magnetic information acquisition sensor is obtained, so as to characterize the magnetic information of the external magnetic field by using the electrical parameter change information; the electrical parameter change information includes at least one of the following:

[0020] voltage variation information of a power source input to the coil;

[0021] Frequency variation information of power input to the coil;

[0022] Current change information of the induced current generated in the loop where the butterfly ring is located.

[0023] Optionally, the data processing module is further used for:

[0024] According to the mapping relationship between the electrical parameter change information and a plurality of preset detection information, target detection information is determined from the plurality of detection information; the detection information includes preset material information and / or property variation information of the object to be detected.

[0025] In the magnetic information acquisition sensor and magnetic information acquisition device provided by the present invention, since the magnetic resistance of the butterfly wing structure is relatively low, and the two ends of the butterfly wing ring can penetrate the butterfly body structure from the two ends of the hollow structure, the magnetic flux of the electromagnetic field of the butterfly body structure can be guided by the butterfly wing ring, and then, the external magnetic field entering the butterfly wing ring from multiple directions can be detected by the magnetic information acquisition sensor, which enriches the direction of information acquisition, and is conducive to improving the integrity and accuracy of information acquisition. At the same time, the power loss caused by "eddy current" heating can also be reduced or eliminated with lower magnetic resistance. In addition, the absorption of the electromagnetic field by the butterfly wing ring can help reduce or eliminate the magnetic flux at various points outside the sensor.

[0026] In a further optional scheme, by setting a central magnetic conductive structure at the center position of the central through hole, the magnetic flux at both ends of the butterfly body structure can also be magnetically conductive, and the magnetic information of the external magnetic field entering this position can also be accurately detected, which makes up for the detection blind spot of the butterfly wing ring. Furthermore, through the combined use of the butterfly wing ring and the central magnetic conductive structure, omni-directional magnetic information collection is achieved.

[0027] In further optional options, after selecting suitable materials such as nanocrystalline ribbon materials, it can help ensure the full absorption of the alternating electromagnetic field, so that the magnetic flux at each point outside the sensor is zero. At the same time, the use of nanocrystalline ribbon materials can also improve the lag problem in dynamic acquisition and meet the needs of quantitative analysis, judgment and decision-making of big data in production and life in modern society. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0029] Figure 1 The structure of the omnidirectional magnetic information acquisition sensor in one embodiment of the present invention is shown in FIG. Figure 1 ;

[0030] Figure 2 The structure of the omnidirectional magnetic information acquisition sensor in one embodiment of the present invention is shown in FIG. Figure 2 ;

[0031] Figure 3 is a schematic diagram of the structure of a magnetic information omnidirectional acquisition sensor in another embodiment of the present invention Figure 1 ;

[0032] Figure 4 is a schematic diagram of the structure of a magnetic information omnidirectional acquisition sensor in another embodiment of the present invention Figure 2 ;

[0033] Figure 5 This is a schematic diagram of the structure of a magnetic information omnidirectional acquisition sensor in another embodiment of the present invention. Figure 1 ;

[0034] Figure 6 This is a schematic diagram of the structure of a magnetic information omnidirectional acquisition sensor in another embodiment of the present invention. Figure 2 ;

[0035] Figure 7 It is a structural schematic diagram of a magnetic information omnidirectional acquisition sensor in another embodiment of the present invention.

[0036] Description of reference numerals:

[0037] 1-Butterfly wing structure;

[0038] 11- butterfly wing ring;

[0039] 111- first access unit;

[0040] 112- second access unit;

[0041] 113-curve part;

[0042] 2-Sphenoid structure;

[0043] 21-Hollow skeleton;

[0044] 22- coil;

[0045] 221-starting thread;

[0046] 222-knot head;

[0047] 23- hollow through hole;

[0048] 3-Center magnetic structure. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0051] The technical solution of the present invention is described in detail with specific embodiments below. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0052] Please refer to Figures 1 to 7 The magnetic information acquisition sensor comprises: a butterfly body structure 2 and two groups of butterfly wing structures 1, wherein the butterfly body structure 2 comprises a long hollow frame 21 and a coil 22 wound on the outer surface of the hollow frame, and each group of butterfly wing structures 1 comprises N butterfly wing rings 11, wherein N is an integer greater than or equal to 1.

[0053] The hollow skeleton 21 has a hollow through hole 23 passing through both ends of the hollow skeleton 21; the first end of each butterfly wing ring 11 passes through the hollow through hole 23 from the first end of the hollow through hole 23, and the second end of each butterfly wing ring 11 passes through the hollow through hole 23 from the second end of the hollow through hole 23.

[0054] The butterfly structure 2 can generate a corresponding electromagnetic field (such as an alternating electromagnetic field) when power is input to the coil 22, and the magnetic flux of the electromagnetic field can be guided by the butterfly wing ring.

[0055] Since the hollow skeleton 21 can be used for winding the coil and also has a hollow through hole 23, it can also be understood as a coil core tube, and the cross-sectional shape of the outer wall and the cross-sectional shape of the inner wall can be the same. Figure 2 , Figure 4 , Figure 6 and Figure 7 For example, it can be a polygon such as a rectangle, or a circle or other regular or irregular shapes. The desired shape can be selected arbitrarily according to the actual needs of the product.

[0056] In addition, solutions in which the cross-sectional shapes of the outer wall and the inner wall are different or not completely the same do not depart from the scope of the embodiments of the present invention.

[0057] The coil can be formed by winding any conductive material. In the specific implementation process, the coil can be a single coil. Figure 1 , Figure 3 and Figure 5 For example, the starting end 221 and the tying end 222 of the coil 22 are both located at the same end of the hollow frame 21 .

[0058] In addition, the position of the butterfly wing structure relative to the butterfly body structure can be fixed in any manner. The figure only illustrates the relative position relationship. Any structural fixing means that can achieve the relative position relationship can be applied to the embodiments of the present invention. For example, an internal fixing structure can be set in the hollow through hole 23, and then the butterfly wing structure 1 can be fixedly connected to the fixed connection structure. For another example, an external fixing structure can also be set outside the hollow skeleton 21, and then the hollow skeleton 21 and the butterfly wing structure 1 are both fixedly connected to the external fixing structure.

[0059] The material of the butterfly wing structure is a material with a magnetic resistance less than a preset value, which can also be understood as a material with a certain magnetic conductivity; no matter what material is used, it only requires to be able to guide the magnetic flux of the electromagnetic field to a certain extent, and it does not deviate from the scope of the embodiments of the present invention.

[0060] Since the magnetic resistance of the butterfly wing structure is low, and the two ends of the butterfly wing ring can penetrate the butterfly body structure from the two ends of the hollow structure, the magnetic flux of the electromagnetic field of the butterfly body structure can be guided by the butterfly wing ring, and then, the external magnetic field entering the butterfly wing ring from multiple directions can be detected by the magnetic information acquisition sensor, which enriches the direction of information collection, and is conducive to improving the integrity and accuracy of information collection. At the same time, the power loss caused by "eddy current" heating can be reduced or eliminated with low magnetic resistance. In addition, the absorption of electromagnetic fields by the butterfly wing ring can help reduce or eliminate the magnetic flux at various points outside the sensor.

[0061] In one embodiment, the material of the butterfly wing structure can be a soft magnet, and further, can be iron, low carbon steel, ferrite, etc. In one preferred solution, a nanocrystalline ribbon material can be used.

[0062] After selecting a suitable material such as nanocrystalline ribbon material, it can be helpful to ensure sufficient absorption of the alternating electromagnetic field, so that the magnetic flux at each point outside the sensor is zero.

[0063] Specifically, taking the electromagnetic field as an alternating electromagnetic field and the excitation current as an alternating current as an example, based on the butterfly wing structure and the butterfly body structure, after the coil of the butterfly body structure is passed with an alternating current, an alternating electromagnetic field will be spread in the surrounding air. At this time, the butterfly wing structure of highly saturated nanocrystalline material (that is, the butterfly wing structure of nanocrystalline strip material) can form a fully absorbed closed magnetic flux alternating uniform magnetic field, so that the magnetic flux at each point in the air in the space near the sensor is zero (which can be represented as Σ￠=0).

[0064] If the alternating voltage U applied to the sensor is a sine wave, then: the magnetic flux Φ in the sensor's AC magnetic circuit is also a sine wave, and the sinusoidal excitation current i (i.e., alternating current) that generates the magnetic flux is 90 degrees to U. 0 Phase difference. The magnetic flux of the two butterfly wing structures is equal and the sum of the magnetic flux of the two butterfly wing structures is equal to the magnetic flux of the butterfly body magnetic circuit. The magnetic flux at both ends of the coil in the butterfly body structure (which can be understood as the nodes of the magnetic circuit) is zero;

[0065] The alternating magnetic flux Φ in the sensor magnetic circuit has a reaction effect on the coil excitation circuit in the butterfly structure, that is, the induced electromotive force (i.e. induced voltage) generated in the excitation circuit is: N·dφ / dt;

[0066] The voltage equation of the sensor excitation circuit is:

[0067] U(t)=ri(t)+N·dφ / dt;

[0068] in:

[0069] ri(t) represents the voltage generated by the internal resistance of the sensor under micro-current;

[0070] N represents the number of turns of the coil.

[0071] Since ri(t) is very small compared with the two phases, U(t)≈N·dφ / dt, that is:

[0072] Therefore, the power supply voltage U(t) in this sensor is basically balanced by the induced voltage N·dφ / dt (N is the number of turns).

[0073] In addition, the use of nanocrystalline ribbon materials can also improve the lag problem in dynamic collection and meet the needs of quantitative analysis, judgment and decision-making of big data in production and life in modern society.

[0074] In one implementation, please refer to Figure 1 , Figure 3 and Figure 5 Each butterfly wing ring 11 includes a first penetration section 111 , a second penetration section 112 and a bending section 113 .

[0075] The first penetration section 111 is located in the hollow through hole 23 and is at the first end of the hollow through hole 23 (it can be understood that one end of the first penetration section 111 is at the end surface of the first end of the hollow through hole 23), the second penetration section 112 is located in the hollow through hole 23 and is at the second end of the hollow through hole 23 (it can be understood that one end of the second penetration section 112 is at the end surface of the second end of the hollow through hole 23), the bending section 113 is located outside the hollow skeleton 21, the first penetration section 111 is connected to the first end of the bending section 113, and the second penetration section 112 is connected to the second end of the bending section 113; the center of curvature of each part of the bending section 113 is on the side of the bending section 113 opposite to the hollow skeleton 21, that is, the bending sections 113 are all bent toward the hollow skeleton 21.

[0076] With respect to the curved section 113, in a preferred solution, the curved shape of the curved section 113 matches the shape of the magnetic flux lines of the butterfly structure 2, and further, can be the same as or similar to the magnetic flux lines. Specifically, its shape can be the same as or similar to the magnetic flux lines theoretically determined by the butterfly structure 2 or the magnetic flux lines measured by actual simulation. At the same time, since the magnetic flux lines of the butterfly structure 2 satisfy the shape of the magnetic flux lines of a conventional long strip magnet, the curved shape of the curved section 113 can also be determined based on the shape of the magnetic flux lines of a conventional and common long strip magnet in the art. Regardless of the method used to determine the curved shape, it does not deviate from the scope of the above embodiments.

[0077] The butterfly wing ring with this structural form can be conducive to achieving full guidance and absorption of magnetic flux. Furthermore, combined with the above structural form of the butterfly wing ring, it can further ensure that the external magnetic flux is zero.

[0078] However, in other optional schemes, the shape of the curved section 113 can also be, for example, an arc formed with the same radius of curvature or other arbitrary curved shapes. When other shapes are adopted, it can also have a certain guiding effect on the magnetic flux. Therefore, they can all be used as a variation scheme under the embodiments of the present invention.

[0079] Further, Figure 3 For example, the first access section 111 and the second access section 112 of the same butterfly wing ring 11 can be connected together, and then Figure 1 For example, the first access section 111 and the second access section 112 of the same butterfly wing ring 11 may not be connected together. In addition, in a solution not shown, even if a butterfly wing structure 1 includes only one butterfly wing ring 11, the first access section 111 and the second access section 112 may not be connected together.

[0080] At the same time, the number of butterfly wing rings 11 can be as follows: Figure 3 The one shown can also be Figure 1 The two shown may be three or more in embodiments not shown.

[0081] If N mentioned above is greater than or equal to 2, that is, the number of butterfly wing rings 11 is greater than or equal to 2, then: the lengths of different butterfly wing rings 11 in the same butterfly wing structure are increased in sequence, wherein:

[0082] The head end of the first butterfly wing ring 11 is fixed in the hollow through hole 23, and the tail end of the last butterfly wing ring 11 is also fixed in the hollow through hole 23; except for the first butterfly wing ring 11, the head end of each butterfly wing ring 11 is fixedly connected to the tail end of the previous butterfly wing ring 11, and each butterfly wing ring 11 is located on the outside of the previous butterfly wing ring 11 (for example, the first access section 111 of each stacked wing ring 11 is fixedly connected to the second access section 112 of the previous butterfly wing ring 11, and the curved section 113, the first access section 111 and the second access section 112 of each butterfly wing ring 11 are all located on the outside of the curved section 113, the first access section 111 and the second access section 112 of the previous butterfly wing ring 11).

[0083] The inner side and the outer side can be understood as follows: the side closer to the side wall of the hollow frame 21 is the inner side, and the side farther from the side wall of the hollow frame 21 is the outer side.

[0084] At the same time, the inner side and outer side only represent the relative position relationship between the inner and outer sides. Figure 2 , Figure 4 and Figure 6 The distribution is based on the same two-dimensional direction (ie, the annular edges on the same side of each butterfly wing ring are coplanar). Figure 2 , Figure 4 and Figure 6 From a bird's-eye view, only the outermost butterfly wing ring can be seen, and each butterfly wing ring can also be seen as Figure 7 As shown, based on the three-dimensional distribution (i.e., the annular edges of at least two butterfly wing rings on the same side are not coplanar, and a certain acute angle can be formed between different butterfly wing rings of the same butterfly wing structure), furthermore, in Figure 7 The top view shown shows the different butterfly wing rings.

[0085] Further, Figure 1 , Figure 3 and Figure 5 For example, the first access section 111 and the second access section 112 may extend to the middle position of the hollow through hole 23 along the length direction respectively.

[0086] In addition, the cross-section of the butterfly wing ring 11 may be rectangular, polygonal, circular, or other regular or irregular shapes.

[0087] In one embodiment, the two groups of butterfly wing structures 1 may be symmetrical about the longitudinal section of the hollow frame 21. The longitudinal section may be, for example Figure 2 , Figure 4 , Figure 6 and Figure 7 The longitudinal section P shown can be understood as a section passing through the geometric center line of the hollow frame 21. If the cross-section of the inner wall and the outer wall of the hollow frame 21 is rectangular, the longitudinal section P can specifically be a longitudinal section passing through the midlines of a pair of long sides of the rectangle.

[0088] In other embodiments not shown in the figure, the two groups of butterfly wing structures 1 can also be distributed in an asymmetrical manner.

[0089] Further, in Figure 2 and Figure 4 In the illustrated embodiment, the two groups of butterfly wing structures 1 may also be centrally symmetrical about the center line of the hollow through hole 23 .

[0090] In actual use, Figure 2 and Figure 4 The centrally symmetrical structure shown can be applied to the application scenario of detecting planar components. Figure 6 The non-centrosymmetric structure shown can be applied to the application scenario of detecting the strip-shaped component, and further, the strip-shaped component can be partially surrounded by the two butterfly-wing structures 1 forming the angle α.

[0091] The angle α can be understood as follows: the two butterfly wing structures are in different orientations relative to the outer contour of the cross section of the butterfly body structure, and the angle between the different orientations is the angle α.

[0092] During the manufacturing process, for the butterfly structure 1, a single wire can be unidirectionally wound around a slender hollow skeleton 21, so that the starting wire end 221 and the knotting wire end 222 are both left at the same end of the coil. The formed cylindrical coil is the central axis butterfly body of the sensor, that is, the butterfly structure 2; furthermore, the two sides of the butterfly structure can form a butterfly wing structure by utilizing nanocrystalline strips that reciprocately penetrate inside and outside the coil.

[0093] Specifically, for the butterfly-wing structure, two long nanocrystalline ribbons can be respectively inserted into the hollow skeleton 21 from one end of the coil, so that one end of the nanocrystalline ribbon is placed in the middle position of the tube (corresponding to the first access section 111 above), and the nanocrystalline ribbon is bent so that the other end is folded toward the other end of the hollow through hole 23 and inserted (corresponding to the second access section 112 above).

[0094] In one embodiment, the two ends of the nanocrystalline ribbon are butt-jointed and closed in the coil core tube (i.e., the hollow frame 21) to form a butterfly wing ring on the outside, for example, Figure 3 The structure shown.

[0095] In another case, one end can also pass through the hollow through hole 23 and then be folded back and penetrated again to form two outer butterfly wing rings.

[0096] In another case, the butterfly wing rings can be reciprocated and inserted into the outer side multiple rings.

[0097] Meanwhile, the nanocrystalline ribbons of the two butterfly-wing structures 1 can be manufactured in the same way, and furthermore, can be symmetrically or asymmetrically placed outside the hollow framework 21 to form the desired butterfly body structure and butterfly-wing structure.

[0098] In one implementation, please refer to Figures 1 to 7 The magnetic information acquisition sensor also includes a central magnetic conductive structure 3, which is arranged at the center position of the hollow through hole 23. Both ends of the central magnetic conductive structure 3 extend to the outside of the hollow through hole 23 along the length direction of the hollow through hole 23. The magnetic flux at the corresponding position of the electromagnetic field (such as the alternating electromagnetic field) can also be guided by the central magnetic conductive structure 3.

[0099] The material of the central magnetic conductive structure 3 can be understood with reference to the butterfly wing structure 1. Furthermore, the material is a material with a magnetic resistance less than a preset value, which can also be understood as a material with a certain magnetic conductivity. No matter what material is used, it only requires to be able to guide the magnetic flux of the electromagnetic field to a certain extent, and it does not deviate from the scope of the embodiments of the present invention.

[0100] In one embodiment, the material of the central magnetic conductive structure 3 can be a soft magnet, and further, can be an iron material, a low-carbon steel material, a ferrite material, etc. In one preferred solution, the material of the central magnetic conductive structure 3 can be a nanocrystalline ribbon material. In addition, the material of the central magnetic conductive structure 3 can be the same as that of the butterfly wing structure 1, or it can be different.

[0101] The shape of the central magnetic conductive structure 3 can be arbitrary. Figure 2 , Figure 4 and Figure 6 For example, its cross section can be rectangular. In other schemes not shown in the figure, it can also be polygonal, circular or other regular or irregular shapes.

[0102] Meanwhile, if the central magnetic conductive structure 3 and the butterfly wing ring 11 are both in a strip shape, the width of the central magnetic conductive structure 3 may be greater than the width of the butterfly wing ring 11 .

[0103] The central magnetic conductive structure in the butterfly body structure can sense the magnetic information existing in the zero zone of the junction of the two butterfly wings (which can be regarded as the interval area between the two butterfly wing structures), eliminate the blind spot of butterfly wing field effect magnetic information collection, and implement omnidirectional coverage information data collection of target information.

[0104] Specifically, when an alternating current of a set frequency is input into the butterfly-wing field effect magnetic information omnidirectional acquisition sensor, when current passes through the coil 22 in the butterfly body structure 2, the butterfly-wing structures on both sides form a closed fixed-frequency alternating magnetic field; when there is no external magnetic field intervention, the butterfly-wing field effect magnetic information omnidirectional acquisition sensor's self-induced magnetic field is quantitatively stable and changes synchronously with the input set alternating electrical quantity.

[0105] It can be seen that in the above scheme, by setting a central magnetic conductive structure at the center position of the central through hole, the magnetic flux at both ends of the butterfly body structure can also be magnetically conductive, and the magnetic information of the external magnetic field entering this position can also be accurately detected, which makes up for the detection blind spot of the butterfly wing ring. Furthermore, through the combined use of the butterfly wing ring and the central magnetic conductive structure, omnidirectional magnetic information collection is realized.

[0106] In summary, it can be seen that the magnetic information sensor provided by the optional scheme of the embodiment of the present invention has a simple structure, and can collect magnetic information in multiple or even omnidirectional directions by utilizing the magnetic field interconnection effect and the principle of magnetoelectric alternation, and can sense the associated information magnetic field in a non-contact manner, fundamentally overcoming the various working drawbacks of previous magnetic sensors in collecting information.

[0107] Based on the sensors involved in the above solutions and optional solutions thereof, an embodiment of the present invention further provides a magnetic information acquisition device, including a data processing module and the magnetic information acquisition sensor involved in the first aspect and optional solutions thereof.

[0108] The data processing module can be any circuit module with data processing capability, and the data processing module and the information acquisition sensor can be arranged in the same structure (such as a housing), or in different structures. The data processing module can be directly or indirectly connected to the circuit of the magnetic information acquisition sensor, for example, it can be connected to at least one of the coil, the power supply of the coil, and the loop where the butterfly wing ring is located through a detection circuit, and can also communicate remotely with the detection circuit to obtain the required electrical parameter change information.

[0109] The data processing module is used for:

[0110] The electrical parameter change information when the power is input into the coil and the external magnetic field enters the butterfly wing structure is obtained, so as to characterize the magnetic information of the external magnetic field by using the electrical parameter change information.

[0111] Optionally, the data processing module is further used for:

[0112] According to the mapping relationship between the magnetic information of the external magnetic field and the preset multiple detection information, the target detection information is determined in the multiple detection information; the detection information includes the preset material information and / or property variation information of the object to be detected.

[0113] It can be seen that based on the "field effect" generated by the butterfly wing structure and the intervening external magnetic field, the magnetic information of the external magnetic field can be effectively collected. In a further scheme, through the mapping relationship between the magnetic characteristic variables evolved by the field effect (such as the electrical parameter change information itself, or its characteristic information) and the target material or property variation, the data information reflecting the target characteristics or changes (that is, reflecting the target detection information) can be quantified.

[0114] Specifically, under the magnetic conduction of the butterfly wing structure and the central magnetic conduction structure, the magnetic field of the butterfly body structure, the butterfly wing structure and the central magnetic conduction structure can be understood as the induced magnetic field of the butterfly wing field effect sensor. In standby mode, the induced magnetic field of the butterfly wing field effect sensor can be in a controllable electromagnetic equilibrium state, in which the magnetic flux generated by the excitation current exists completely in the material constituting the butterfly wing field effect sensor, and the magnetic flux in the air near the outside of the material is zero.

[0115] by Figures 1 to 6 Taking the structure shown as an example, the alternating voltage U, frequency f output by the power supply, and the alternating magnetic flux Φ and number of turns N of the butterfly structure conform to the general relationship of electromagnetic devices: U = 2πfNΦ.

[0116] When an external magnetic field (which can also be understood as the information magnetic field of target detection information) intersects with the induced magnetic field of the butterfly wing field effect sensor in space, the induced magnetic field of the butterfly wing field effect sensor will lose its original balance. Assuming that the intervening external magnetic field is expressed as a micro-incremental magnetic flux △Фi in the butterfly wing magnetic field, an induced electromotive force will be generated in the sensor, and an induced voltage will be generated in the 22 coils of the butterfly body structure 2; because the magnetic wing structure is not only a high-saturation magnetic conductor but also a conductor, a micro-induced current △i will be generated in the loop where the magnetic wing ring is located, and the magnetic resistance of the magnetic wing ring is close to zero, and the loop where the magnetic wing ring is located will not cause power loss due to "eddy current" heating.

[0117] It can be seen from the relationship U=2πfNФ that when the magnetic flux Ф in the equilibrium state inside the sensor changes to (Ф+△Фi), other related parameters will also change to achieve a new balance.

[0118] If the alternating voltage U is kept constant at the input end, the change in the alternating frequency f (sine wave waveform change) reflects the ΔΦi intervention amount (i.e., the change in magnetic flux caused by the external magnetic field); correspondingly, the electrical parameter change information may include frequency change information of the power supply input to the coil, and the frequency change information may be any information that can characterize the change in the alternating frequency, for example;

[0119] If the given alternating frequency f is kept unchanged, the electric quantity compensation for restoring the balance will be provided by the input alternating voltage U; correspondingly, the electric parameter change information may include voltage change information of the power supply input to the coil, and the voltage change information may be any information that can characterize the change of the alternating voltage, for example;

[0120] In addition, the amount of magnetic information access △Φi can also be reflected by the butterfly wing loop current increment △i. Correspondingly, the electrical parameter change information can also include the current change information of the induced current generated in the loop where the butterfly wing ring is located, and the current change information can, for example, characterize any information of the current increment △i or its change.

[0121] It can be seen that the electrical parameter change information mentioned above may include, for example, at least one of the following:

[0122] voltage variation information of a power source input to the coil;

[0123] Frequency variation information of power input to the coil;

[0124] Current change information of the induced current generated in the loop where the butterfly ring is located.

[0125] Among them, the loop in which the butterfly wing ring is located can be formed by the butterfly wing ring itself, or it can be formed by the butterfly wing ring in conjunction with other conductive circuits. For example: each butterfly wing structure can form a loop through a conductive circuit, and two butterfly wing structures can also form an overall loop through corresponding conductive circuits.

[0126] In addition to the above examples, since magnetic information can be understood as information about the magnetic flux of the external magnetic field entering the sensor or information associated with it, any other information associated with the change in magnetic flux can also be used as an electrical parameter change information.

[0127] It can be seen that in the above scheme, the "captured" magnetic information can be quantitatively characterized by multiple parameters. This omnidirectional magnetic information acquisition working mode that does not analyze single electrical quantity changes can be understood as a "field effect" mode.

[0128] Based on the information of electrical parameter changes, multi-parameter magnetic information analysis and selection can be performed, and then, they can be defined separately according to data quantization accuracy or evolution requirements. The definition results can be understood as the mapping relationship mentioned above.

[0129] The mapping relationship can be defined, for example, as: a certain quantified electrical parameter change information is mapped to a certain detection information (a certain material or a certain property characteristic), or a combination of certain quantified electrical parameter change information is mapped to a certain detection information (a certain material or a certain property characteristic), wherein the electrical parameter change information mapped by one detection information may include only one type of electrical parameter change information, or may include multiple types of electrical parameter change information.

[0130] The specific mapping relationship may be determined based on a limited number of experiments, experience or theoretical calculations. Regardless of the mapping relationship ultimately used, it does not depart from the scope of the embodiments of the present invention.

[0131] In addition, in the actual working process, it is also possible to effectively avoid information noise interference based on the actual working conditions of the working environment, maintain and improve the authenticity, reliability and repeatability of the collected information.

[0132] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A magnetic information acquisition sensor, characterized in that: include: A butterfly body structure, two groups of butterfly wing structures, and a central magnetic conductive structure, wherein the butterfly body structure includes a long hollow frame and a coil wound on the outer surface of the hollow frame, and each group of butterfly wing structures includes N butterfly wing rings, where N is an integer greater than or equal to 1; the material of the butterfly wing structure is a material with a magnetic resistance less than a preset value; The hollow frame has hollow through holes penetrating through both ends of the hollow frame; the first end of each butterfly wing ring penetrates into the hollow through hole from the first end of the hollow through hole, and the second end of each butterfly wing ring penetrates into the hollow through hole from the second end of the hollow through hole; The butterfly structure can generate a corresponding electromagnetic field when power is input to the coil, and the magnetic flux of the electromagnetic field can be guided by the butterfly wing ring; The central magnetic conductive structure is disposed at the center of the hollow through hole, and both ends of the central magnetic conductive structure extend outside the hollow through hole along the length direction of the hollow through hole, so that the magnetic flux at the corresponding position of the electromagnetic field can be guided by the central magnetic conductive structure.

2. The magnetic information acquisition sensor according to claim 1, characterized in that: Each butterfly wing ring includes a first penetration section, a second penetration section and a bending section; The first penetration section is located in the hollow through hole and at the first end of the hollow through hole, the second penetration section is located in the hollow through hole and at the second end of the hollow through hole, the curved section is located outside the hollow skeleton, the first penetration section is connected to the first end of the curved section, and the second penetration section is connected to the second end of the curved section; the center of curvature of each part of the curved section is located on the side of the curved section opposite to the hollow skeleton.

3. The magnetic information acquisition sensor according to claim 2, characterized in that: The curved shape of the curved section matches the shape of the magnetic flux lines of the butterfly structure.

4. The magnetic information acquisition sensor according to any one of claims 1 to 3, characterized in that: The material of the butterfly wing structure is a soft magnet, and the soft magnet is any one of the following: iron material, low carbon steel material, ferrite material, and nanocrystalline ribbon material.

5. The magnetic information acquisition sensor according to any one of claims 1 to 3, characterized in that: The two groups of butterfly wing structures are symmetrical with respect to the longitudinal section of the hollow skeleton.

6. The magnetic information acquisition sensor according to any one of claims 1 to 3, characterized in that: The coil is a single coil, and the starting end and the tying end of the coil are both located at the same end of the hollow frame.

7. The magnetic information acquisition sensor according to any one of claims 1 to 3, characterized in that: If N is greater than or equal to 2, then: the lengths of different butterfly wing rings in the same butterfly wing structure are increased in sequence, where: The head end of the first butterfly wing ring is fixed in the hollow through hole, and the tail end of the last butterfly wing ring is also fixed in the hollow through hole; Except for the first butterfly wing ring, the head end of each butterfly wing ring is fixedly connected to the tail end of the previous butterfly wing ring, and each butterfly wing ring is located outside the previous butterfly wing ring.

8. A magnetic information acquisition device, characterized in that: It comprises a data processing module and the magnetic information acquisition sensor according to any one of claims 1 to 7; the data processing module is used for: When the power supply is input into the coil and the external magnetic field enters the butterfly wing structure, the electrical parameter change information of the magnetic information acquisition sensor is obtained, so as to characterize the magnetic information of the external magnetic field by using the electrical parameter change information; the electrical parameter change information includes at least one of the following: voltage variation information of a power source input to the coil; Frequency variation information of power input to the coil; Current change information of the induced current generated in the loop where the butterfly ring is located.

9. The magnetic information acquisition device according to claim 8, characterized in that: The data processing module is also used for: According to the mapping relationship between the electrical parameter change information and a plurality of preset detection information, target detection information is determined from the plurality of detection information; the detection information includes preset material information and / or property variation information of the object to be detected.

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