In-plane omnidirectional wave field vector detection method, sensor, apparatus, and system

Abstract

An in-plane omnidirectional wave field vector detection method, a sensor, an apparatus, and a system, relating to the technical field of electromagnetic ultrasonic detection. The sensor comprises a housing (1), and a shielding layer (3), a vector transduction unit (2), a magnet and a signal interface (5) which are sequentially arranged in the housing (1) in the axial direction, wherein the signal interface (5) penetrates through the housing (1); and the vector transduction unit (2) comprises at least two linear detection elements (22), which can simultaneously detect induced potential field components in at least two different directions. The in-plane omnidirectional wave field vector detection method allows for in-plane omnidirectional wave field vector detection on the basis of induced potential field components in multiple directions detected by a vector electromagnetic ultrasonic sensor. The in-plane omnidirectional wave field vector detection system uses a vector electromagnetic ultrasonic sensor to implement induction signal detection. Omnidirectional wave field detection can be achieved, effectively reducing the transduction area of a receiver, thus improving the measurement resolution of a wave field.

Description

In-plane omnidirectional wave field vector detection method, sensor, device and system Technical Field

[0001] The present application relates to the field of electromagnetic ultrasonic detection technology, and in particular to an in-plane omnidirectional wave field vector detection method, sensor, device and system. Background Art

[0002] Measuring the wave field propagating in solids is crucial for applications such as measuring the sound field radiated by acoustic transducers and ultrasonic flaw detection. Sensors for wave field measurement primarily include piezoelectric sensors, magnetostrictive sensors, laser vibrometers, and electromagnetic ultrasonic sensors. Traditional sensors can only detect the synthetic sound pressure in the transducer area and lack the ability to detect vector vibration fields.

[0003] For example, piezoelectric and magnetostrictive sensors, limited by their transducer effect and structure, can often only measure sound pressure on a single surface. Strongly directional transducers can often only measure wave field information in a certain direction, making it difficult to collect vector vibration information of the wave field at the measured point, especially when the vibration direction is time-varying and multi-directional or when the vibration direction is inconsistent at each measurement point in the measurement area. Furthermore, due to the influence of coupling agents, piezoelectric and magnetostrictive sensors have difficulty achieving good consistency across measurement points when measuring wave fields over a large area.

[0004] The 3D laser vibrometer uses three laser vibrometer heads for collaborative measurement. It can obtain the displacement / velocity information of each measured point during three-dimensional vibration and can conveniently perform large-area scanning detection. It has great advantages in in-plane omnidirectional wave field detection. However, it is expensive and has high requirements for the operating environment due to its complex electromechanical control system. It is mainly used in indoor environments and is inconvenient to use in ultrasonic deep wound engineering sites with diverse operating environments.

[0005] Due to their coupling agent-free nature, electromagnetic ultrasonic sensors offer excellent repeatability and consistency in fluctuating field detection, finding important applications in radiated sound field measurement and ultrasonic flaw detection. However, conventional electromagnetic ultrasonic sensors primarily utilize single structures such as toroidal coils, butterfly coils, runway coils, folded coils, and cable coils. These sensors are unable to obtain vector vibration field information at the measurement point when detecting fluctuating fields. Because the vibration direction of the measurement point is unknown, the electromagnetic ultrasonic linear detection elements (particularly directional coils such as butterfly coils, runway coils, folded coils, and cable coils) in the measurement setup exhibit random angles with the actual vibration direction of the measurement point. Performing a fluctuating field scanning measurement will yield measurement results that differ significantly from the actual sound field, rendering the measurement method unfeasible. Furthermore, existing electromagnetic ultrasonic transducers are limited by their coil loop structure and have a large transduction area (generally no less than 5 mm in diameter), making it difficult to achieve high-resolution fluctuating field measurements. Consequently, existing methods for fluctuating field detection based on magnetic induction signals from multiple directions are also lacking.

[0006] Summary of the Invention

[0007] In order to solve at least one of the above-mentioned existing problems, the present invention provides an in-plane omnidirectional wave field vector detection method, sensor, device and system, which can be used for scanning detection of ultrasonic vibration vectors in the surface of the measured point and the vector vibration distribution map of each point in the entire domain.

[0008] According to a first aspect of the embodiments of the present application, the present application provides an in-plane omnidirectional wave field vector detection method, comprising:

[0009] Acquire sensing signals in multiple directions at the measured position, wherein the sensing signals are generated by the in-plane omnidirectional fluctuating field of the measured position under the action of an external magnetic field; the sensing signals are acquired based on any vector electromagnetic ultrasonic sensor provided in this application;

[0010] Determine the induction potential field of the measured position according to the induction signals in various directions;

[0011] The in-plane omnidirectional wave field at the measured position is determined according to the interaction relationship among the induced potential field, the external magnetic field and the in-plane omnidirectional wave field, and the external magnetic field and the induced potential field.

[0012] According to a second aspect of the embodiments of the present application, the present application provides a vector electromagnetic ultrasonic sensor for obtaining the induction signal of the method described in the first aspect of the present application, the sensor comprising: a hollow cylindrical housing and a shielding layer, a vector transducer unit, a magnet, and a signal interface arranged in sequence along the axial direction within the housing;

[0013] The vector transducer unit includes a bracket and at least two linear detection elements arranged on the bracket, and each linear detection element transmits the detected induction signal to the signal interface through a corresponding lead;

[0014] The shielding layer covers the bottom surface of the vector transducer unit, and an opening is provided at the center thereof, wherein the center of the opening is aligned with the center of the bottom surface of the vector transducer unit;

[0015] The magnet is used to provide a bias magnetic field perpendicular to the vector transducer unit;

[0016] The signal interface is used to output the sensing signal.

[0017] According to a third aspect of the embodiments of the present application, the present application provides an in-plane omnidirectional wave field vector detection device, comprising:

[0018] An induction signal acquisition module, configured to acquire induction signals in multiple directions at a measured position, the induction signals being generated by an in-plane omnidirectional wave field at the measured position under the action of an external magnetic field; the induction signals being acquired based on any of the vector electromagnetic ultrasonic sensors provided in this application;

[0019] an induction potential field determination module, configured to determine the induction potential field of the measured position according to the induction signals in various directions;

[0020] The in-plane omnidirectional wave field determination module is used to determine the in-plane omnidirectional wave field at the measured position based on the induced potential field, the external magnetic field, and the interaction relationship among the in-plane omnidirectional wave field, the external magnetic field and the induced potential field.

[0021] According to a fourth aspect of the embodiments of the present application, the present application provides an in-plane omnidirectional wave field vector detection system, the system comprising:

[0022] A vector electromagnetic ultrasonic sensing subsystem for simultaneously detecting sensing signals in N directions at a measured position, wherein the sensing signals are generated by an in-plane omnidirectional wave field at the measured position under the action of a bias magnetic field, where N is a positive integer greater than or equal to 2; the vector electromagnetic ultrasonic sensing subsystem includes any vector electromagnetic ultrasonic sensor provided in this application;

[0023] a signal transmission and processing subsystem, the input of which is connected to the vector electromagnetic ultrasonic sensing subsystem, and is used to transmit and process the sensing signal detected by the vector electromagnetic ultrasonic sensing subsystem;

[0024] The vector receiving and analyzing subsystem is connected to the signal transmission subsystem and is used to receive and analyze the sensing signal and determine the in-plane omnidirectional wave field of the measured position.

[0025] The in-plane omnidirectional wave field vector detection method and device of the present application perform vector analysis based on the induction signals in multiple directions of the measured position, which can realize the detection of the planar omnidirectional wave field at the measured position and effectively improve the sensitivity of omnidirectional wave field detection.

[0026] The vector electromagnetic ultrasonic sensor provided by the present application can detect the induced potential field components in at least two directions on the measured point on the surface of a solid metal material by arranging at least two linear detection elements with a certain angle. As the number of linear detection elements increases, the vector electromagnetic ultrasonic sensor of the present application can detect the induced potential field components in more directions of the measured point, thereby achieving high sensitivity response in any direction in the detection of the randomly distributed in-plane omnidirectional wave field and obtaining more accurate analytical results. At the same time, the detection sensing area of ​​the vector electromagnetic ultrasonic sensor of the present application is determined by the size of the central hole area of ​​the shielding layer, which effectively reduces the transducer area of ​​the receiver, greatly improves the measurement resolution of the omnidirectional wave field, and is conducive to obtaining a high-resolution wave field vector vibration distribution map.

[0027] The in-plane omnidirectional wave field vector detection system provided by the present application utilizes a vector electromagnetic ultrasonic sensing subsystem to simultaneously detect the induced potential field components in multiple different directions at the measured position, and transmits and conditions the induced potential field components through a signal transmission and processing subsystem so that the vector receiving and analyzing subsystem can analyze the induced potential field components, thereby realizing the detection of the ultrasonic vibration vector in the plane of the measured position and the scanning detection of the vector vibration distribution map of each point in the entire domain. The in-plane omnidirectional wave field vector detection system of the present application greatly improves the omnidirectional wave field measurement resolution, thereby obtaining a high-resolution wave field vector vibration distribution map, which is conducive to improving the accuracy of the analysis results. 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 following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 any creative work.

[0029] FIG1 is a schematic diagram of an in-plane omnidirectional wave field vector detection method provided in an embodiment of the present application.

[0030] FIG2 is a schematic diagram of a sensor provided in an embodiment of the present application.

[0031] FIG3 is a schematic diagram of a vector transducer unit provided in an embodiment of the present application.

[0032] 4A and 4B are schematic diagrams of a shielding layer and a vector transducer unit provided in an embodiment of the present application.

[0033] FIG5 is a schematic diagram of a step for determining an induced potential field provided in an embodiment of the present application.

[0034] FIG6 is a schematic diagram of another step of determining the induced potential field provided in an embodiment of the present application.

[0035] FIG7 is a schematic diagram of an in-plane omnidirectional wave field vector detection device provided in an embodiment of the present application.

[0036] FIG8 is another schematic diagram of the in-plane omnidirectional wave field vector detection device provided in an embodiment of the present application.

[0037] FIG9 is another schematic diagram of the in-plane omnidirectional wave field vector detection device provided in an embodiment of the present application.

[0038] FIG10 is a block diagram of an in-plane omnidirectional wave field vector detection system provided in an embodiment of the present application.

[0039] FIG11 is another block diagram of the in-plane omnidirectional wave field vector detection system provided in an embodiment of the present application.

[0040] FIG12A is a connection diagram of an in-plane omnidirectional wave field vector detection system provided in an embodiment of the present application.

[0041] FIG12B is a schematic diagram showing a connection between a vector electromagnetic ultrasonic sensor and a signal transmitter provided in an embodiment of the present application.

[0042] FIG12C is another connection diagram of the in-plane omnidirectional wave field vector detection system provided in an embodiment of the present application.

[0043] FIG13 is another block diagram of the in-plane omnidirectional wave field vector detection system provided in an embodiment of the present application.

[0044] FIG14 is a schematic diagram of a computer device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0046] The present application provides an in-plane omnidirectional wave field vector detection method. FIG1 is a schematic diagram of the in-plane omnidirectional wave field vector detection method provided by an embodiment of the present application. As shown in FIG1 , the method includes steps S101 to S103:

[0047] Step S101, acquiring sensing signals in multiple directions of the measured position;

[0048] Step S102, determining the induction potential field of the measured position according to the induction signals in various directions;

[0049] Step S103 : determining the in-plane omnidirectional wave field at the measured position according to the interaction relationship among the induced potential field, the external magnetic field, and the in-plane omnidirectional wave field.

[0050] Therefore, the in-plane omnidirectional wave field vector detection method of the present application performs vector analysis based on the induction signals in multiple directions of the measured position, which can realize the detection of the planar omnidirectional wave field at the measured position and effectively improve the sensitivity of omnidirectional wave field detection.

[0051] In step S101, sensing signals in multiple directions of a measured position are acquired.

[0052] In some embodiments, the measured position of the present application is the surface of the measured object, such as the surface of a solid metal material. The sensing signal is collected by a sensor disposed at the measured position, and this step can obtain sensing signals in multiple directions of the measured position from the sensor end.

[0053] In some embodiments, the induction signal is generated by the in-plane omnidirectional fluctuating field of the measured position under the action of an external magnetic field.

[0054] For example, suppose that at a certain measuring point on the surface of the object being measured There is an in-plane omnidirectional wave field along a certain direction The omnidirectional wave field in this plane Under the action of an external magnetic field (not shown), an induced potential field is formed The induced potential field is sensed and received by a sensor disposed directly above the measurement point via electromagnetic induction. The induced signals in multiple directions in step S101 are components of the induced potential field in multiple directions.

[0055] In some embodiments, the sensing signal in each of the multiple directions can be obtained according to any existing method that complies with the principle of electromagnetic induction.

[0056] In some embodiments, the sensing signal in each of the multiple directions is acquired by a sensor.

[0057] FIG2 is a schematic diagram of a sensor provided in an embodiment of the present application. The sensor is a vector electromagnetic ultrasonic sensor, which can be used to obtain sensing signals in multiple directions in step S101.

[0058] As shown in Figure 2, the vector electromagnetic ultrasonic sensor comprises a hollow housing 1, a vector transducer unit 2, a shielding layer 3, leads 4, a signal interface 5, a magnet (not shown), and a protective layer 6. The protective layer 6, shielding layer 3, vector transducer unit 2, magnet, and signal interface 5 are arranged in sequence along the axial direction of the housing 1. One end of the signal interface 5 is located inside the housing 1 and connected to each lead 4 via a multi-core connector. The other end is exposed from the housing 1 and is used to connect to a signal receiver, sampler, or other instrument. The protective layer 6 is made of a non-metallic material.

[0059] Figure 3 is a schematic diagram of a vector transducer unit provided in an embodiment of the present application. As shown in Figure 3, the vector transducer unit 2 includes a bracket 21 and linear detector elements 22 arranged at different angles on the bracket 21. There are at least two linear detector elements, each used to sense the components of the induced potential field at the measured point in different directions. The shape of the bracket 21 can be, for example, a flat cylindrical shape as shown in Figure 2, or a flat polygon or other shape. In addition, the thickness of the bracket 21 can be adjusted according to actual conditions and is not limited by this application.

[0060] In some embodiments, each linear detector element 22 is arranged on the support 21 at a different angle, and each linear detector element 22 overlaps at the exact center of the upper and lower bottom surfaces of the support 21. Taking the 10 linear detector elements shown in FIG3 as an example, the production process of the linear detector elements is as follows: first, a first group of independent straight wires is wound around the support 21 to form a first layer of linear detector elements AA'. Then, linear detector elements BB', CC', ..., JJ' are wound in the same manner to form the vector transducer unit shown in FIG3. It can be understood that the later-wound linear detector element BB' presses the earlier-wound linear detector element AA' at the center of the upper and lower bottom surfaces of the support 21. Therefore, the height of the later-wound linear detector element BB' at the center of the upper and lower bottom surfaces of the support is slightly higher than the earlier-wound linear detector element BB'. Therefore, during the actual detection process, the lift-off distances of the linear detector elements in different layers from the detection point on the surface of the measured material are also different. In order to achieve consistent detection results of the linear detector elements, it is necessary to establish lift-off calibration data for each linear detector element before detection.

[0061] Thus, by deploying at least two linear detectors at a certain angle, during the measurement of a fluctuating field on the surface of a solid metal material, the metal material surface area corresponding to the receiving transducer area is used as the measurement point. Since different linear detectors are arranged in different directions, the fluctuating field vibrations in any direction at any measurement point during the measurement process can be detected by the vector transducer unit. This application can achieve the measurement of any fluctuating field on the surface of a solid metal material, while effectively reducing the receiver transducer area and improving the resolution of fluctuating field measurements.

[0062] In some embodiments, a plurality of protrusions 24 are provided on the bracket 21 , and wire grooves are formed between adjacent protrusions 14 .

[0063] In some embodiments, the number of wire slots can be arranged in pairs based on the number of linear detector elements 22. When viewed from the upper or lower bottom surface of the bracket 21, the two wire slots in a pair are aligned with the center of the bottom surface of the bracket 21. Each linear detector element 22 is engaged and wound around a pair of wire slots. The provision of wire slots helps secure the linear detector elements 22 and prevent them from falling apart.

[0064] In some embodiments, each linear detector element 22 is independent of one another and is connected to a lead wire for transmitting sensing signals. When measuring the acoustic field on the surface of a solid metal material, each linear detector element 22 independently receives ultrasonic sensing signals in the direction corresponding to the measured point and transmits the detected sensing signals to the signal interface via the lead wire connected to it. In other words, each linear detector element 22 and its connected lead wire constitute an independent detection channel for signal detection and acquisition.

[0065] In some embodiments, the vector transducing unit 2 includes a vector detection transducing area at its center.

[0066] In some embodiments, the vector detection transducer region is provided by way of an outer shielding layer.

[0067] Figures 4A and 4B are schematic diagrams of a shielding layer and a vector transducer unit according to an embodiment of the present application. Figure 4A is a perspective of the lower bottom surface of the vector transducer unit, and Figure 4B is a perspective of the upper bottom surface of the vector transducer unit.

[0068] The detailed structure of the shielding layer 3 can be seen in FIG4A . As shown in FIG4A , the shielding layer 3 covers the lower surface of the vector transducer unit 2. Its shape is similar to that of the lower surface of the vector transducer unit 2, and its size is sufficient to cover the coil area of ​​the vector transducer unit 2. The shielding layer 3 has an opening 31 in the center, with the center of the opening 31 aligned with the center of the bottom surface of the vector transducer unit 2.

[0069] In some embodiments, the opening 31 of the shielding layer 3 may be in various shapes. For example, the opening 31 may be circular as shown in FIG4A , or may be polygonal or in other shapes, which are not limited in the present application.

[0070] For the vector detection transduction area, please refer to the schematic diagram of the lower bottom surface of the vector transduction unit 2 shown in Figure 4A and the schematic diagram of the upper bottom surface of the vector transduction unit 2 shown in Figure 4B. The vector detection transduction area 23 corresponds to the opening 31 of the shielding layer 3, and the remaining area is the shielding area 25. All linear detector elements within the shielding area 25 are isolated and shielded, and do not have the function of sensing or receiving signals, but only have the function of signal transmission. Only the linear detector elements within the vector detection transduction area 23 can sense or receive signals.

[0071] In some embodiments, a magnet is disposed directly above the upper bottom surface of the vector transducer unit 2, with its magnetic poles pointing vertically downward. The magnet is used to provide a bias magnetic field perpendicular to the vector transducer unit. In this application, magnets include but are not limited to permanent magnets, flexible magnets, and electromagnets.

[0072] In some embodiments, referring to FIG4B , the width d of each linear detection element of the vector transducer unit 2 is the same, and the angle α between adjacent linear detection elements is the same, that is, each linear detection element is evenly arranged on the bracket with the upper and lower bottom surfaces of the bracket as the center.

[0073] In some embodiments, each linear detector element is formed by winding a wire, and each linear detector element can be composed of a single wire or a single wire wound into multiple turns in parallel. The number of turns, winding direction, and winding method of each linear detector element are consistent.

[0074] In some embodiments, the linear detector elements are fabricated using a printed circuit board.

[0075] In some embodiments, in conjunction with FIG. 4A and FIG. 4B , the radius of the circular opening 31 of the shielding layer 3 may be half the width d of each linear detection element 22 , ie In other words, the diameter of the vector detection transducer region 23 is the same as the width d of the linear detection element. This allows the conductors of the linear detection elements in different directions to fully cover the vector detection transducer region, ensuring that the transducer areas of the linear detection elements in all directions are completely consistent.

[0076] In some embodiments, the diameter of the circular opening 31 is, for example, 2 mm.

[0077] Therefore, through the above embodiments, the vector electromagnetic ultrasonic sensor can have a better detection effect.

[0078] The vector electromagnetic ultrasonic sensor of the above embodiment can detect the induced potential field components in at least two directions on the measured point on the surface of the solid metal material by arranging at least two linear detection elements with a certain angle. As the number of linear detection elements increases, the vector electromagnetic ultrasonic sensor of the present application can detect the induced potential field components in more directions of the measured point, thereby achieving high-sensitivity response to any direction in the randomly distributed in-plane omnidirectional wave field detection and obtaining more accurate analysis results.

[0079] Moreover, by applying the above-mentioned vector electromagnetic ultrasonic sensor to the in-plane omnidirectional wave field vector detection method of the present application, a more accurate induced potential field can be obtained at the measured point, thereby effectively reducing the receiver transduction area and improving the wave field measurement resolution.

[0080] In some embodiments, when a sensor acquires inductive signals in multiple directions at a measured location, the external magnetic field that forms the inductive signals is the external magnetic field set by the sensor. A specific interaction exists between the in-plane omnidirectional fluctuating field at any measured location, the external magnetic field applied to the same measured location, and the induced potential field formed by the in-plane omnidirectional fluctuating field under the action of the external magnetic field. Based on any two of these three factors and this interaction, the third of these three factors can be determined.

[0081] In step S102, the induced potential field of the measured position is determined according to the induced signals in various directions.

[0082] The sensing signal S in the i-th direction among multiple directions i (t) as an example, assuming that the sensing signal S i and induced potential field The angle is θ i , then the following relationship exists:

[0083] Wherein, 1≤i≤N, i and N are both positive integers, and N is the number of sensing signals acquired in step S101. The present application determines the sensing potential field based on the acquired sensing signals and the above relationship.

[0084] FIG5 is a schematic diagram of a step for determining an induction potential field according to an embodiment of the present application. As shown in FIG5 , step S102, determining the induction potential field of the measured position according to each of the induction signals, includes:

[0085] Step S1021, selecting a first sensing signal and a second sensing signal from the sensing signals in multiple directions;

[0086] The first sensing signal and the second sensing signal may be randomly selected from sensing signals in multiple directions, or may be selected according to a specific rule, for example, based on the amplitude of each sensing signal. Therefore, in some embodiments, selecting the first sensing signal and the second sensing signal from sensing signals in multiple directions includes the following steps:

[0087] (1) extracting the amplitude of the induced signal in each direction;

[0088] (2) sorting the sensing signals according to the amplitude;

[0089] (3) The two sensing signals with the largest amplitudes in the sorting results are respectively determined as the first sensing signal and the second sensing signal.

[0090] Wherein, if step (2) is sorted in descending order, then in step (3), the first-ranked sensing signal and the second-ranked sensing signal are respectively determined as the first sensing signal and the second sensing signal; if step (2) is sorted in ascending order, then in step (3), the last-ranked sensing signal and the second-last-ranked sensing signal are respectively determined as the first sensing signal and the second sensing signal.

[0091] In this embodiment, the two sensing signals with the largest amplitudes are respectively used as the first sensing signal and the second sensing signal, which is beneficial to improving the sensitivity of omnidirectional wave field detection.

[0092] Step S1022: determining the induced potential field according to the first induced signal, the second induced signal, and an angle between the first induced signal and the second induced signal.

[0093] For example, step S1022 specifically includes the following steps:

[0094] (1) constructing a set of equations according to the first sensing signal, the second sensing signal, and the angle between the first sensing signal and the second sensing signal;

[0095] The system of equations is:

[0096] Among them, S j (t) is the first sensing signal, S k (t) is the second sensing signal, α is the angle between the first sensing signal and the second sensing signal, is the induced potential field, θ j is the angle between the first induction signal and the induction potential field, θ k is the angle between the second induction signal and the induction potential field.

[0097] (2) Solving the equation group to obtain the orientation and magnitude of the induced potential field.

[0098] In the above equations, the first sensing signal S j (t), the second sensing signal S k (t) and the angle α between the first induction signal and the second induction signal are known quantities. By solving the equations, the unknown induction potential field can be obtained: The size of the induced potential field With the first sensing signal S j (t) the angle θ j And the induced potential field and the second sensing signal S k (t) the angle θ k , and then determine the orientation of the induced potential field at the measured position.

[0099] According to the above embodiment, the present application reversely solves the size and orientation of the induced potential field through the components (induced signals) of the unknown induced potential field in different directions.

[0100] FIG6 is a schematic diagram of another step of determining the induced potential field according to an embodiment of the present application. As shown in FIG6 , step S102, determining the induced potential field of the measured position according to the induced signals in various directions, includes:

[0101] Step S1023, determining the orientation of the induced potential field according to the first induced signal and the second induced signal in the induced signals in multiple directions;

[0102] Determining the orientation of the induced potential field in this step can be achieved according to step S1021 and step S1022. For example, first, a first sensing signal and a second sensing signal are selected from the sensing signals in multiple directions; then, the orientation of the induced potential field is determined according to the first sensing signal, the second sensing signal, and the angle between the first sensing signal and the second sensing signal.

[0103] Since the implementation of step S1023 is similar to the above-mentioned steps S1021 and S1022, the above contents are merged here and will not be repeated here.

[0104] Step S1024: extracting phase information of the sensing signals in each direction, and adjusting the sensing signals to be in phase according to the phase information;

[0105] The phase information of the induction signals in multiple directions obtained by this application exists in two states: in-phase and out-phase. In this step, the phase of each induction signal is adjusted to the same phase, where it is assumed that the induction signal in the i-th direction before the phase adjustment is represented by S i (t), its phase is Then the induced signal in the i-th direction after phase adjustment is expressed as Wherein, 1≤i≤N, i and N are both positive integers, and N is the number of sensing signals acquired in step S101.

[0106] Step S1025, determining the induction potential field to be calibrated according to the induction signals with the same phase;

[0107] Specifically, the induction signals with the same phase after phase adjustment are vector-summed to obtain the induction potential field to be calibrated:

[0108] Step S1026: Perform omnidirectional consistency calibration on the induced potential field to be calibrated according to the orientation to obtain the induced potential field.

[0109] Specifically, this step is to calibrate the induced potential field to be calibrated obtained in step S1025 according to the orientation of the induced potential field determined in step S1023. The azimuth is calibrated to obtain the induced potential field

[0110] In the above embodiment, the present application performs vector summation on the sensing signals in multiple directions, which can improve the detection sensitivity of the in-plane omnidirectional wave field even when the energy of the wave field is weak and the sensing signals obtained in multiple directions are also relatively weak.

[0111] In step S103, the in-plane omnidirectional wave field at the measured position is determined according to the interaction relationship among the induced potential field, the external magnetic field and the in-plane omnidirectional wave field.

[0112] The induced potential field in this step is determined by the above-mentioned step S102, and the external magnetic field and the interaction relationship are known. Therefore, based on the external magnetic field applied to the same measured position, the induced potential field formed by the in-plane omnidirectional fluctuating field under the action of the external magnetic field, and the above-mentioned known interaction relationship, the in-plane omnidirectional fluctuating field at the measured position can be determined.

[0113] According to the above embodiments, the in-plane omnidirectional wave field vector detection method of the present application performs vector analysis based on the induction signals in multiple directions of the measured position, which can realize the detection of the planar omnidirectional wave field at the measured position and effectively improve the sensitivity of omnidirectional wave field detection.

[0114] Based on the same inventive concept as the in-plane omnidirectional fluctuation field vector detection method, the embodiment of the present application also provides an in-plane omnidirectional fluctuation field vector detection device, which can be used to implement the method described in the above embodiment, as described in the following embodiment. Since the principle of solving the problem by the in-plane omnidirectional fluctuation field vector detection device is similar to that of the in-plane omnidirectional fluctuation field vector detection method, the implementation of the in-plane omnidirectional fluctuation field vector detection device can refer to the implementation of the in-plane omnidirectional fluctuation field vector detection method, and the repetitions will not be repeated. As used below, the term "unit" or "module" can be a combination of software and / or hardware that implements a predetermined function. Although the system described in the following embodiments is preferably implemented in software, implementation in hardware, or a combination of software and hardware, is also possible and conceived.

[0115] FIG7 is a schematic diagram of an in-plane omnidirectional wave field vector detection device provided by an embodiment of the present application. As shown in FIG7 , the device includes:

[0116] The sensing signal acquisition module 401 is used to acquire sensing signals in multiple directions at the measured position, where the sensing signals are generated by the in-plane omnidirectional wave field at the measured position under the action of an external magnetic field;

[0117] An induction potential field determination module 402 is configured to determine an induction potential field at a measured position based on the induction signals in various directions;

[0118] The in-plane omnidirectional wave field determination module 403 is used to determine the in-plane omnidirectional wave field at the measured position according to the interaction relationship among the induced potential field, the external magnetic field and the in-plane omnidirectional wave field.

[0119] FIG8 is another schematic diagram of an in-plane omnidirectional wave field vector detection device provided by an embodiment of the present application. As shown in FIG8 , the induced potential field determination module 402 includes:

[0120] A sensing signal selection unit 4021 is configured to select a first sensing signal and a second sensing signal from the sensing signals in multiple directions;

[0121] The induced potential field determining unit 4022 is configured to determine the induced potential field according to the first induced signal, the second induced signal, and the angle between the first induced signal and the second induced signal.

[0122] In some embodiments, the sensing signal selection unit 4021 includes:

[0123] an amplitude extraction subunit, configured to extract the amplitude of the sensing signal in each direction;

[0124] a sensing signal sorting subunit, configured to sort the sensing signals according to the amplitude;

[0125] The sensing signal selection subunit is configured to determine the two sensing signals with the largest amplitudes in the sorting result as the first sensing signal and the second sensing signal, respectively.

[0126] In some embodiments, the induced potential field determining unit 4022 includes:

[0127] an equation group construction subunit, configured to construct an equation group according to the first sensing signal, the second sensing signal, and the angle between the first sensing signal and the second sensing signal;

[0128] an equation group analysis subunit, configured to solve the equation group to obtain the orientation and magnitude of the induced potential field;

[0129] The system of equations is:

[0130] Among them, S j (t) is the first sensing signal, S k (t) is the second sensing signal, α is the angle between the first sensing signal and the second sensing signal, is the induced potential field, θ j is the angle between the first induction signal and the induction potential field, θ k is the angle between the second induction signal and the induction potential field.

[0131] FIG9 is another schematic diagram of an in-plane omnidirectional wave field vector detection device provided by an embodiment of the present application. As shown in FIG9 , the induced potential field determination module 402 includes:

[0132] an orientation determining unit 4023, configured to determine an orientation of the induced potential field according to a first induced signal and a second induced signal among the induced signals in multiple directions;

[0133] a phase unification unit 4024 configured to extract phase information of the sensing signals in various directions and adjust the sensing signals to be in phase according to the phase information;

[0134] an induction potential field calculation unit 4025, configured to determine an induction potential field to be calibrated based on the induction signals of the same phase;

[0135] The induced potential field calibration unit 4026 is configured to perform omnidirectional consistency calibration on the induced potential field to be calibrated according to the orientation to obtain the induced potential field.

[0136] The in-plane omnidirectional wave field vector detection device of the present application performs vector analysis based on the induction signals in multiple directions of the measured position, which can realize the detection of the planar omnidirectional wave field at the measured position and effectively improve the sensitivity of omnidirectional wave field detection.

[0137] In some embodiments, the present application further provides an in-plane omnidirectional wave field vector detection system. Figure 10 is a schematic diagram of an in-plane omnidirectional wave field vector detection system provided in an embodiment of the present application.

[0138] As shown in FIG10 , the in-plane omnidirectional wave field vector detection system 100 includes a vector electromagnetic ultrasound subsystem 41 , a signal transmission and processing subsystem 42 , and a vector receiving and analyzing subsystem 43 .

[0139] FIG11 is another block diagram of an in-plane omnidirectional wave field vector detection system provided in an embodiment of the present application. As shown in FIG11 , the vector electromagnetic ultrasonic sensing subsystem 41 includes a vector electromagnetic ultrasonic sensor 411. The vector electromagnetic ultrasonic sensor has multiple sensing units, for example, N sensing units, where N is a positive integer greater than or equal to 2. When the vector electromagnetic ultrasonic sensing subsystem 41 is located directly above the measured position, the N sensing units are respectively used to detect the induced signals in N different directions of the measured position. In addition, the vector electromagnetic ultrasonic sensing subsystem 41 also has a signal output interface for outputting the induced signals detected by the N sensing units to the signal transmission and processing subsystem 42.

[0140] In some embodiments, the vector electromagnetic ultrasonic sensor 411 is any vector electromagnetic ultrasonic sensor provided in the embodiments of the present application; in other embodiments, the vector electromagnetic ultrasonic sensor 411 is other sensors capable of obtaining induction signals in N different directions at the measured position, and the present application does not impose any restrictions on this.

[0141] In some embodiments, the measured position of the present application is the surface of the measured object, such as the surface of a solid metal material, which can be a plane or a curved surface. The induced signal detected by the sensing unit of the vector electromagnetic ultrasonic sensor is a component of the induced potential field formed by the in-plane omnidirectional wave field of the measured position under the action of an external bias magnetic field. The vector electromagnetic ultrasonic sensor simultaneously detects the induced signals in N different directions of the measured position through N sensing units, that is, the induced potential field components. In the present application, the external bias magnetic field is, for example, a bias magnetic field set by the sensor.

[0142] In some embodiments, the input of the signal transmission and processing subsystem 42 is connected to the output of the vector electromagnetic ultrasonic sensing subsystem 41, and the output of the signal transmission and processing subsystem 42 is connected to the input of the vector receiving and analyzing subsystem 43. The signal transmission and processing subsystem 42 is configured to transmit the induced signal detected by the vector electromagnetic ultrasonic sensing subsystem 41 to the vector receiving and analyzing subsystem 43.

[0143] In some embodiments, the vector receiving and analyzing subsystem 43 receives the sensing signal detected by the vector electromagnetic ultrasonic sensing subsystem 41 through its receiving channel and the signal transmission and processing subsystem 42, and analyzes the sensing signal to determine the in-plane omnidirectional wave field of the measured position.

[0144] According to the above embodiment, the in-plane omnidirectional wave field vector detection system of the present application utilizes a vector electromagnetic ultrasonic sensing subsystem to simultaneously detect the induced potential field components in multiple different directions of the measured position, and transmits and conditions the induced potential field components through the signal transmission and processing subsystem so that the vector receiving and analyzing subsystem can analyze the induced potential field components, thereby realizing the detection of the ultrasonic vibration vector in the plane of the measured position and the scanning detection of the vector vibration distribution map of each point in the entire domain. The in-plane omnidirectional wave field vector detection system of the present application greatly improves the omnidirectional wave field measurement resolution, so that a high-resolution wave field vector vibration distribution map can be obtained, which is conducive to improving the accuracy of the analysis results.

[0145] In some embodiments, as shown in FIG11 , the vector reception and analysis subsystem 43 includes a host computer 431. The input of the host computer 431 is connected to the output of the signal transmission and processing subsystem 42. The host computer 431 includes a software program that, when executed, stores, displays, and processes the received sensing signals.

[0146] For example, when the software program in the host computer 431 is executed, it implements the following functions: recording each induction signal received from the signal interface of the vector electromagnetic ultrasonic sensor; extracting the amplitude and phase of each induction signal; performing phase adjustment on all the induction signals, and summing the induction signals after phase adjustment to obtain an induction potential field to be calibrated; determining the azimuth information of the induction potential field based on two induction signals in each induction signal; performing omnidirectional consistency calibration on the induction potential field to be calibrated based on the azimuth information; analyzing the in-plane vibration direction and amplitude of the measured point based on the detection direction information of each sensing unit in the vector electromagnetic ultrasonic sensor and the phase and amplitude information of the induction signal detected by each sensing unit, and obtaining the in-plane vector vibration detection result of the measured point.

[0147] In some embodiments, as shown in FIG11 , the signal transmission and processing subsystem 42 includes a signal transmitter 421 and a signal conditioner 422 that are interconnected.

[0148] In some embodiments, the signal transmitter 421 is implemented as a channel switch.

[0149] The channel switch includes M input interfaces and one output interface. N of the M input interfaces are connected in a one-to-one correspondence with the output terminals of the N sensing units of the vector electromagnetic ultrasonic sensor 411, and are respectively used to receive sensing signals detected by the N sensing units of the vector electromagnetic ultrasonic sensor 411, where M ≥ N, and M and N are both positive integers greater than or equal to 2. The output interface of the channel switch is connected to the input terminal of the signal conditioner 422 (second signal conditioner).

[0150] In some embodiments, the signal conditioner 422 is used to receive and condition the sensing signal detected by the vector electromagnetic ultrasonic sensor 411, such as by performing signal conditioning operations such as amplification and filtering on the sensing signal. Because the channel switcher has only one output interface, only the sensing signal detected by one of the N sensing units of the vector electromagnetic ultrasonic sensor 411 can be output to the signal conditioner 422 for conditioning at a time. The conditioned sensing signal by the signal conditioner 422 is then transmitted to the vector receiving and analyzing subsystem 43.

[0151] For example, Figure 12B shows a schematic diagram of a connection between a vector electromagnetic ultrasonic sensor and a signal transmitter according to an embodiment of the present application. As shown in Figure 12A , signal transmitter 421 is a channel switch 4211, which includes N input interfaces and one output interface. Each input interface is connected to an output interface, forming N signal transmission channels CH 1 through CH N. During system operation, the N signal transmission channels CH 1 through CH N are connected according to a preset rule, and only one signal transmission channel is connected at any given time.

[0152] In some embodiments, the N input interfaces of the channel switch 4211 are respectively connected to the N sensing units of the vector electromagnetic ultrasonic sensor 411 in a one-to-one correspondence. For example, Figure 12B is another connection diagram of the in-plane omnidirectional wave field vector detection system provided in an embodiment of the present application. As shown in Figure 12B, the sensing unit of the vector electromagnetic ultrasonic sensor is a coil wound on a bracket. Figure 12B shows 10 sensing units A to J, and each sensing unit (coil) includes a lead. The N input interfaces of the channel switch 4211 are respectively connected to the leads of different sensing units. In Figure 12B, there is a certain angle between each sensing unit (coil) to detect the induction signals in different directions of the measured position.

[0153] In some embodiments, corresponding to the channel switch 4211 , the signal conditioner 422 may be a single-channel receiving signal conditioner (a second signal conditioner).

[0154] Continuing with FIG12A , the single-channel receiving signal conditioner 4221 includes an input channel connected to the output interface of the channel switch 4211 for receiving the sensing signal output by the channel switch 421. It should be noted that, because only one signal transmission channel of the channel switch 4211 is connected at a time, the single-channel receiving signal conditioner 4221 can only receive the sensing signal detected by one sensing unit of the vector electromagnetic ultrasonic sensor 41 at a time. When the signal transmission channels connected to the sensing units of the vector electromagnetic ultrasonic sensor 41 are connected in sequence, the single-channel receiving signal conditioner 4221 can sequentially receive the sensing signals detected by different sensing units.

[0155] Of course, the signal conditioner 422 can also be a multi-channel parallel receiving signal conditioner, which includes multiple input channels. In this case, by connecting any one of the input channels to the output interface of the channel switch 4211, a function similar to that of the single-channel receiving signal conditioner 4221 can be achieved.

[0156] Those skilled in the art will appreciate that the number of input interfaces of the channel switch 4211 may be greater than N. FIG12A and FIG12B are merely examples of possible embodiments, and the present application is not limited thereto. In practical applications, the number of input interfaces of the channel switch 4211 is greater than or equal to the number of sensing units in the vector electromagnetic ultrasonic sensor 41.

[0157] In some embodiments, the signal transmitter 421 uses a multi-channel connector.

[0158] The multi-channel connector includes M input interfaces and M output interfaces corresponding to each input interface; N input interfaces among the M input interfaces are connected one-to-one with the output ends of the N sensing units of the vector electromagnetic ultrasonic sensor 411, and are respectively used to receive the sensing signals detected by the N sensing units; N output interfaces among the M output interfaces corresponding to the N input interfaces are respectively connected to the vector receiving and analyzing subsystem 43, and are used to simultaneously output the sensing signals detected by the N sensing units to the vector receiving and analyzing subsystem; wherein M≥N, M and N are both positive integers greater than or equal to 42.

[0159] For example, Figure 12C shows another connection diagram for the in-plane omnidirectional wave field vector detection system provided in an embodiment of the present application. As shown in Figure 12C , the signal transmitter 421 is a multi-channel connector 212, which includes N input interfaces and N output interfaces corresponding to the N input interfaces. Each input interface is connected to a corresponding output interface, forming N signal transmission channels CH 1 to CH N. During system operation, the N signal transmission channels CH 1 to CH N are connected simultaneously.

[0160] The N input interfaces of the multi-channel connector 4212 are connected one-to-one with the N sensing units of the vector electromagnetic ultrasonic sensor. The connection method is shown in FIG12B . This is similar to the connection method of the N input interfaces of the channel switch 4211 and the N sensing units of the vector electromagnetic ultrasonic sensor in the previous embodiment. The above content is incorporated herein and will not be repeated here.

[0161] Corresponding to the multi-channel connector 4212 , the signal conditioner 422 may be a multi-channel parallel receiving signal conditioner (third signal conditioner).

[0162] The multi-channel parallel receiving signal conditioner includes L input channels; N input channels of the L input channels are connected one-to-one with the N output interfaces of the multi-channel connector 4212, and are used to simultaneously receive N sensing signals output by the channel connector 4212; wherein L ≥ N, L and N are both positive integers greater than or equal to 2.

[0163] For example, referring to FIG12C , corresponding to the multi-channel connector 4212, the signal conditioner 422 is a multi-channel parallel receiving signal conditioner 4222, which includes N input channels, which are respectively connected to the N output interfaces of the multi-channel connector 4212, and are used to receive the sensing signals output by the multi-channel connector 4212. It should be noted that because the N signal transmission channels of the multi-channel connector 4212 are simultaneously connected, the multi-channel parallel receiving signal conditioner 4222 can simultaneously and in parallel receive the sensing signals detected by all sensing units of the vector electromagnetic ultrasonic sensor 411.

[0164] Those skilled in the art will appreciate that the number of input interfaces of multi-channel connector 4212 may be greater than N. FIG12B is merely one possible example, and the present application is not limited thereto. In practical applications, the number of input interfaces of multi-channel connector 4212 is greater than or equal to the number of sensing units in vector electromagnetic ultrasonic sensor 411; and the number of input channels of multi-channel parallel receive signal conditioner 4222 is greater than or equal to the number of sensing units in vector electromagnetic ultrasonic sensor 411.

[0165] In the embodiments shown in FIG. 11 , FIG. 12A , and FIG. 12C , a signal conditioner is provided in the signal transmission and processing subsystem 42 .

[0166] FIG13 is another block diagram of an in-plane omnidirectional wave field vector detection system provided by an embodiment of the present application. As shown in FIG13 , a signal conditioner 412 (a first signal conditioner) can also be provided in the vector electromagnetic ultrasonic sensing subsystem 41. Similarly, a signal conditioner 432 (a fourth signal conditioner) can also be provided in the vector receiving and analyzing subsystem 43. In other words, the signal conditioner of the present application can be deployed in any subsystem, and its functions are similar, and are all used to amplify, filter, and other conditioning of the sensing signal.

[0167] In some embodiments, a signal conditioner is provided in at least two of the three subsystems, namely the vector electromagnetic ultrasonic sensing subsystem 41 , the signal transmission and processing subsystem 42 , and the vector receiving and analyzing subsystem 43 , to achieve hierarchical amplification and conditioning of the sensing signal.

[0168] In some embodiments, the in-plane omnidirectional wave field vector detection system 100 further includes a specific surface scanning device (not shown), wherein the specific surface scanning device is used to carry the vector electromagnetic ultrasonic sensor subsystem 41, and the vector electromagnetic ultrasonic sensor subsystem 41 is fixedly mounted on the specific surface scanning device.

[0169] When the specific surface scanning device moves on the surface to be measured, the specific surface scanning device drives the vector electromagnetic ultrasonic sensor subsystem 41 to move synchronously to achieve scanning of the surface to be measured.

[0170] According to the above embodiments, the in-plane omnidirectional wave field vector detection system of the present application is combined with a specific surface scanning device to obtain a vector vibration distribution diagram of the wave field on the measured surface.

[0171] The in-plane omnidirectional wave field vector detection system of the present application can detect the induced potential field components in at least two directions on the measured point on the surface of the solid metal material by arranging at least two transducer coil linear detection elements with a certain angle. As the number of transducer coil linear detection elements increases, the vector electromagnetic ultrasonic sensor of the present application can detect the induced potential field components in more directions of the measured point, thereby achieving high sensitivity response to any direction in the detection of the randomly distributed in-plane omnidirectional wave field, and obtaining more accurate analytical results. The present application is combined with the vector analytical method to obtain more accurate information on the direction and amplitude of the induced potential field vibration at the measured point. At the same time, the detection sensing area of ​​the vector electromagnetic ultrasonic sensor of the present application is determined by the size of the central hole area of ​​the shielding layer, and is applied to the in-plane omnidirectional wave field measurement method, which effectively reduces the receiver transducer area, greatly improves the omnidirectional wave field measurement sound field measurement resolution, and obtains a high-resolution wave field vector vibration distribution map.

[0172] In some embodiments, the present application further provides a computer device. Referring to FIG14 , the electronic device 100 specifically includes:

[0173] A central processing unit (CPU) 110 , a memory (memory) 120 , a communication module (Communications) 130 , an input unit 140 , an output unit 150 and a power supply 160 .

[0174] The memory 120, the communication module 130, the input unit 140, the output unit 150, and the power supply 160 are respectively connected to the central processing unit 110. The memory 120 stores a computer program, and the central processing unit 110 can call the computer program. When the central processing unit 110 executes the computer program, all steps of the in-plane omnidirectional wave field vector detection method in the above embodiment are implemented.

[0175] In some embodiments, the present application further provides a computer-readable storage medium for storing a computer program, wherein the computer program is executable by a processor. When the computer program is executed by the processor, any of the in-plane omnidirectional wave field vector detection methods provided in the embodiments of the present application is implemented.

[0176] It will be understood by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Thus, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0177] The present invention is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device produce a device for implementing the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0178] These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce a product including an instruction device that implements the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0179] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, so that the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0180] The various embodiments in this specification are described in a progressive manner. Similar parts between the various embodiments can be referenced to each other. Each embodiment focuses on the differences from other embodiments. In the description of this specification, the reference terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" mean that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of this specification.

[0181] In addition, the specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above is only a specific embodiment of the present invention and is not intended to limit the embodiments of this specification. Those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are mutually contradictory. For those skilled in the art, the embodiments of this specification may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of this specification shall be included within the scope of the claims of the embodiments of this specification.

Claims

1. A method for detecting an in-plane omnidirectional wave field vector, characterized in that: include: Acquire induction signals in multiple directions of the measured position, wherein the induction signals are formed by the in-plane omnidirectional wave field of the measured position under the action of an external magnetic field; Determine the induction potential field of the measured position according to the induction signals in various directions; The in-plane omnidirectional wave field at the measured position is determined according to the interaction relationship among the induced potential field, the external magnetic field and the in-plane omnidirectional wave field.

2. The method according to claim 1, characterized in that The step of determining the induction potential field of the measured position according to each of the induction signals comprises: Selecting a first sensing signal and a second sensing signal from the sensing signals in multiple directions; The induced potential field is determined according to the first induced signal, the second induced signal, and an angle between the first induced signal and the second induced signal.

3. The method according to claim 2, characterized in that The selecting the first sensing signal and the second sensing signal from the sensing signals in multiple directions comprises: Extracting the amplitude of the sensing signal in each direction; sorting the sensing signals according to the amplitude; The two sensing signals with the largest amplitudes in the sorting result are respectively determined as the first sensing signal and the second sensing signal.

4. The method according to claim 2, characterized in that: The determining the induced potential field according to the first induced signal, the second induced signal, and the angle between the first induced signal and the second induced signal includes: Constructing a set of equations according to the first sensing signal, the second sensing signal, and the angle between the first sensing signal and the second sensing signal; Solving the set of equations to obtain the orientation and magnitude of the induced potential field; The system of equations is: Among them, S j (t) is the first sensing signal, S k (t) is the second sensing signal, α is the first sensing signal and The angle of the sensing signal, is the induced potential field, θ j is the angle between the first induction signal and the induction potential field, θ k is the angle between the second induction signal and the induction potential field.

5. The method according to claim 1, characterized in that Determining the induction potential field of the measured position according to the induction signals in various directions includes: Determine the orientation of the induced potential field according to a first induced signal and a second induced signal among the induced signals in multiple directions; Extracting phase information of the sensing signals in each direction, and adjusting the sensing signals to be in phase according to the phase information; Determining the induction potential field to be calibrated according to the induction signals of the same phase; The induced potential field to be calibrated is omnidirectionally consistent and calibrated according to the orientation to obtain the induced potential field.

6. An in-plane omnidirectional wave field vector detection device, characterized in that: include: An induction signal acquisition module, used to acquire induction signals in multiple directions of the measured position, wherein the induction signals are formed by the in-plane omnidirectional wave field of the measured position under the action of an external magnetic field; An induction potential field determination module, used to determine the induction potential field of the measured position according to the induction signals in various directions; The in-plane omnidirectional wave field determination module is used to determine the in-plane omnidirectional wave field at the measured position according to the interaction relationship among the induced potential field, the external magnetic field and the in-plane omnidirectional wave field.

7. The device according to claim 6, characterized in that The induced potential field determination module comprises: a sensing signal selecting unit, configured to select a first sensing signal and a second sensing signal from the sensing signals in multiple directions; An induction potential field determining unit is used to determine the induction potential field according to the first induction signal, the second induction signal, and an angle between the first induction signal and the second induction signal.

8. The device according to claim 6, characterized in that The induced potential field determination module comprises: an orientation determining unit, configured to determine the orientation of the induced potential field according to a first induction signal and a second induction signal among the induction signals in multiple directions; A phase unification unit, used to extract phase information of the sensing signals in various directions, and adjust the sensing signals to be in phase according to the phase information; an induction potential field calculation unit, used to determine the induction potential field to be calibrated according to the induction signals of the same phase; The induction potential field calibration unit is used to perform omnidirectional consistency calibration on the induction potential field to be calibrated according to the orientation to obtain the induction potential field.

9. A sensor, characterized in that: The sensor is used to obtain the sensing signals in multiple directions of the measured position in the in-plane omnidirectional wave field vector detection method described in any one of claims 1 to 5, or to obtain the sensing signals in multiple directions of the measured position in the in-plane omnidirectional wave field vector detection device described in any one of claims 6 to 8; The sensor comprises: a hollow shell, and a shielding layer, a vector transducer unit, a magnet and a signal interface sequentially arranged in the shell along the axial direction; The vector transducer unit includes a bracket and at least two linear detection elements arranged on the bracket, and each linear detection element transmits the detected induction signal to the signal interface through a corresponding lead wire; The shielding layer covers the bottom surface of the vector transducer unit, and an opening is provided at the center thereof, and the center of the opening is aligned with the center of the bottom surface of the vector transducer unit; The magnet is used to provide a bias magnetic field perpendicular to the vector transducer unit; The signal interface is used to output the sensing signal.

10. The vector electromagnetic ultrasonic sensor according to claim 9, characterized in that: The linear detection elements overlap at the centers of the upper and lower bottom surfaces of the bracket.

11. The vector electromagnetic ultrasonic sensor according to claim 10, characterized in that: The widths of the linear detection elements are the same, and the angles between adjacent linear detection elements are the same.

12. The vector electromagnetic ultrasonic sensor according to claim 11, characterized in that: The linear detection element is formed by winding a conducting wire.

13. The vector electromagnetic ultrasonic sensor according to claim 11, characterized in that: The diameter of the opening is the same as the width of the linear detection element.

14. The vector electromagnetic ultrasonic sensor according to claim 9, characterized in that: The magnet is one of a permanent magnet, a flexible magnet and an electromagnet.

15. The vector electromagnetic ultrasonic sensor according to claim 9, characterized in that: The bracket is provided with a wire groove for fixing the linear detection element.

16. The vector electromagnetic ultrasonic sensor according to claim 9, characterized in that: A protective layer is also arranged on the side of the shielding layer facing away from the vector transducer unit, and the protective layer is made of non-metallic material.

17. An in-plane omnidirectional wave field vector detection system, characterized in that: include: A vector electromagnetic ultrasonic sensor subsystem, for simultaneously detecting induction signals in N directions at a measured position, wherein the induction signals are formed by an in-plane omnidirectional wave field at the measured position under the action of a bias magnetic field, and N is a positive integer greater than or equal to 2; the vector electromagnetic ultrasonic sensor subsystem comprises a sensor according to any one of claims 9 to 16 Device; A signal transmission and processing subsystem, whose input is connected to the vector electromagnetic ultrasonic sensing subsystem and is used to transmit and process the sensing signal detected by the vector electromagnetic ultrasonic sensing subsystem; The vector receiving and analyzing subsystem is connected to the signal transmission subsystem and is used to receive and analyze the sensing signal and determine the in-plane omnidirectional wave field of the measured position.

18. The in-plane omnidirectional wave field vector detection system according to claim 17, characterized in that: The vector electromagnetic ultrasonic sensing subsystem also includes a first signal conditioner; The first signal conditioner is used to amplify, filter and impedance match the N sensing signals detected by the vector electromagnetic ultrasonic sensor.

19. The in-plane omnidirectional wave field vector detection system according to claim 17, characterized in that: The signal transmission and processing subsystem includes a channel switch; The channel switch includes M input interfaces and one output interface; Among them, N input interfaces among the M input interfaces are respectively connected to the vector electromagnetic ultrasonic sensing subsystem, and are respectively used to receive N sensing signals detected by the vector electromagnetic ultrasonic sensing subsystem; The output interface is connected to the vector receiving and analyzing subsystem, and is used to output one sensing signal among the N received sensing signals to the vector receiving and analyzing subsystem; Wherein, M≥N, M and N are both positive integers greater than or equal to 2.

20. The in-plane omnidirectional wave field vector detection system according to claim 19, characterized in that: The signal transmission and processing subsystem also includes a second signal conditioner; The second signal conditioner is a single-channel receiving signal conditioner, which includes an input channel connected to the output interface of the channel switcher and used for receiving the sensing signal output by the channel switcher.

21. The in-plane omnidirectional wave field vector detection system according to claim 17, characterized in that: The signal transmission and processing subsystem includes a multi-channel connector; The multi-channel connector includes M input interfaces and M output interfaces corresponding to each of the input interfaces; Among them, N input interfaces among the M input interfaces are connected to the vector electromagnetic ultrasonic sensing subsystem, and are respectively used to receive one of the N sensing signals detected by the vector electromagnetic ultrasonic sensing subsystem; N output interfaces among the M output interfaces corresponding to the N input interfaces are respectively connected to the vector receiving and analyzing subsystem, and are used to simultaneously output one sensing signal among the N received sensing signals to the vector receiving and analyzing subsystem; Wherein, M≥N, M and N are both positive integers greater than or equal to 2.

22. The in-plane omnidirectional wave field vector detection system according to claim 21, characterized in that: The signal transmission and processing subsystem further includes a third signal conditioner; The third signal conditioner is a multi-channel parallel receiving signal conditioner, which includes L input channels; Among them, N input channels of the L input channels are connected to the N output interfaces of the multi-channel connector in a one-to-one correspondence, so as to simultaneously receive N sensing signals output by the multi-channel connector; Wherein, L≥N, L and N are both positive integers greater than or equal to 2.

23. The in-plane omnidirectional wave field vector detection system according to claim 17, characterized in that: The vector receiving and analyzing subsystem includes a host computer; The host computer includes a software program, and when the software program is executed, the received sensing signal is stored, displayed and subjected to signal analysis processing.

24. The in-plane omnidirectional wave field vector detection system according to claim 23, characterized in that: The vector receiving and analyzing subsystem further includes a fourth signal conditioner; The fourth signal conditioner is used to amplify and filter the N sensing signals detected by the vector electromagnetic ultrasonic sensor respectively.

25. The in-plane omnidirectional wave field vector detection system according to any one of claims 17 to 24, characterized in that: The in-plane omnidirectional wave field vector detection system also includes: A specific surface scanning device, wherein the vector electromagnetic ultrasonic sensor subsystem is fixedly arranged on the specific surface scanning device; The specific surface scanning device is used to drive the vector electromagnetic ultrasonic sensor subsystem to move to achieve scanning of the measured surface.

26. A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the in-plane omnidirectional wave field vector detection method described in any one of claims 1 to 5 is implemented.

27. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the in-plane omnidirectional wave field vector detection method described in any one of claims 1 to 5 is implemented.

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