CN113640393A - Electromagnetic ultrasonic phased array probe and electromagnetic ultrasonic detection method - Google Patents

Abstract

The invention discloses an electromagnetic ultrasonic phased array probe and an electromagnetic ultrasonic detection method, wherein the electromagnetic ultrasonic phased array probe comprises a packaging shell, and the electromagnetic ultrasonic phased array probe also comprises: phased array transducer unit and magnetic unit of setting in encapsulation shell, wherein, phased array transducer unit includes: the phased array transduction device comprises a plurality of phased array transduction array elements which are linearly arranged, wherein the phased array transduction array elements are runway-type conductive coils which are symmetrical along two sides of a center line, a magnetic unit is used for providing a bias magnetic field and covers the phased array transduction unit, and the magnetic pole direction of the magnetic unit is perpendicular to the phased array transduction unit. By the invention, electromagnetic ultrasonic phased array detection can be realized.

Description

Electromagnetic ultrasonic phased array probe and electromagnetic ultrasonic detection method

Technical Field

The invention relates to the field of ultrasonic nondestructive testing, in particular to an electromagnetic ultrasonic phased array probe and an electromagnetic ultrasonic testing method.

Background

The ultrasonic phased array imaging detection has the advantages of visual and reliable detection result, high detection efficiency, easiness in quantitative analysis of the defects of the detected object and the like, and is widely applied to industrial nondestructive detection. However, in the conventional piezoelectric ultrasonic phased array, a coupling agent must be used between the probe and the object to be detected during detection, and the surface condition of the object to be detected has strict requirements, and the surface of the object to be detected often needs to be polished so as to obtain a good coupling state when the probe and the object to be detected are in contact. Therefore, the detection result of the piezoelectric ultrasonic phased array is very susceptible to the surface condition and the coupling state of the object to be detected, and the polishing of the surface of the object to be detected may reduce the detection efficiency and may cause new damage to the object to be detected. In addition, the piezoelectric ultrasonic phased array is difficult to realize high-temperature online detection, so that the traditional piezoelectric ultrasonic phased array is difficult to meet the detection requirements of working conditions such as high-temperature online, rough surface condition, polishing and the like.

At present, the electromagnetic ultrasonic detection method has the characteristics of no need of polishing, no need of a coupling agent, non-contact detection, applicability to extremely high and low temperature objects and the like, and is widely applied to the aspects of corrosion residual wall thickness measurement, high-temperature online detection and the like. But the method is difficult to be applied to nondestructive inspection due to low transduction efficiency, weak detection signal, low sensitivity of defect echo and the like. In addition, most of conventional electromagnetic ultrasonic probes only have one transducer coil, can only perform single-point detection, and cannot perform synthesis and deflection control of sound beams so as to realize electromagnetic ultrasonic flaw detection.

Disclosure of Invention

In view of the above, the present invention provides an electromagnetic ultrasonic phased array probe and an electromagnetic ultrasonic detection method to solve at least one of the above-mentioned problems.

According to a first aspect of the present invention, there is provided an electromagnetic ultrasonic phased array probe including a package housing, the electromagnetic ultrasonic phased array probe further including: a phased array transducing unit and a magnetic unit disposed within the package housing, wherein the phased array transducing unit includes: a plurality of linear arrangement's phased array transduction array element, phased array transduction array element is along the runway type conductive coil of central line bilateral symmetry, the magnetism unit for provide bias magnetic field, cover in phased array transduction unit top, the magnetic pole direction of magnetism unit with phased array transduction unit is perpendicular.

Wherein the track-type conductive coil comprises: the connecting section comprises parallel straight-line section leads positioned on two sides of the central line and connecting section leads connected with the parallel straight-line sections.

Specifically, the shape of the connecting segment wire is one of the following: semi-circle, arc, straight line, wave broken line, sharp angle line.

Preferably, the excitation current direction of each phased array transducing array element is set to be the same.

Further, the magnetic unit is a single magnet.

Or the magnetic unit comprises a plurality of combined magnet units, each combined magnet unit comprises two magnets with opposite magnetic pole directions, the two magnets respectively cover two sides of the central line of the phased array transduction array element,

the number of the combined magnet units is the same as that of the phased array transduction array elements.

Preferably, the excitation current directions of adjacent phased array transducing array elements are set to be opposite.

Further, the magnetic unit comprises a plurality of single magnets covering parts of adjacent phased array transducing array elements with the same direction of excitation current.

Preferably, the electromagnetic ultrasonic phased array probe further includes: the base of predetermined thickness sets up between phased array transducer unit and the magnetic unit, the base includes the barrier film, set up in the base with between the magnetic unit.

The base is made of a non-metal non-magnetic material.

Preferably, the electromagnetic ultrasonic phased array probe further includes: and the protective layer is arranged between the phased array transduction unit and the detected object so as to protect the phased array transduction unit.

The protective layer is a high temperature resistant protective layer.

Preferably, the electromagnetic ultrasonic phased array probe further includes: the connector, set up in on the encapsulation shell, the one end of connector with phased array transducer unit passes through signal lead connection, the other end and the check out test set of connector pass through external signal line connection.

Further, when the surface of the detected object is a curved surface, the plurality of phased array transducing elements arranged in a linear shape of the phased array transducing elements are arranged to match the surface of the detected object, and the magnetic element is a soft magnet matching the shape of the phased array transducing elements.

According to a second aspect of the present invention, an electromagnetic ultrasonic detection method is provided, which uses the electromagnetic ultrasonic phased array probe to detect an object to be detected.

According to the technical scheme, the phased array transducer which is composed of the phased array transduction array elements is formed by adopting the runway type conductive coils, the transduction efficiency can be greatly improved, the bias magnetic field is provided through the magnetic unit, phased array sound beams such as deflection and focusing can be excited, and compared with an electromagnetic ultrasonic probe in the prior art, the electromagnetic ultrasonic phased array detection device can realize electromagnetic ultrasonic phased array detection.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a block diagram of an electromagnetic ultrasonic phased array probe according to an embodiment of the invention;

FIG. 2 is a schematic diagram of a phased array transducing array element 21 according to an embodiment of the present invention;

fig. 3(a), 3(b) are schematic diagrams of a phased array transducing unit 2 according to an embodiment of the present invention;

fig. 4 is a schematic diagram of the operation principle of the magnetic unit 3 being a single magnet (single magnet) with the same direction of exciting current for each array element according to the embodiment of the present invention;

FIG. 5 is a schematic diagram of an electromagnetic ultrasonic phased array probe with a bias magnetic field provided by a single magnet, according to an embodiment of the invention;

FIG. 6 is a schematic diagram of the operating principle of an electromagnetic ultrasonic phased array probe in which a bias magnetic field is provided by a periodic magnet in accordance with an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of an electromagnetic ultrasonic phased array probe based on the structure shown in FIG. 6;

FIG. 8 is a schematic diagram of another operational principle of an electromagnetic ultrasonic phased array probe in which a bias magnetic field is provided by a periodic magnet in accordance with an embodiment of the present invention;

FIG. 9 is a schematic diagram of an electromagnetic ultrasonic phased array probe implemented with soft magnets according to an embodiment of the present invention;

FIG. 10 is a schematic diagram of an external view of an electromagnetic ultrasonic phased array probe according to an embodiment of the invention;

FIG. 11 is a schematic diagram of an electromagnetic ultrasonic phased array probe with a bias magnetic field provided by a single magnet, according to an embodiment of the invention;

FIG. 12 is a schematic diagram of an electromagnetic ultrasonic phased array probe in which a bias magnetic field is provided by a periodic magnet, according to an embodiment of the invention;

fig. 13-17 are exemplary diagrams of ultrasound waves according to embodiments of the present invention.

Reference numerals:

1. a package housing;

2. a phased array transducing unit;

21. a phased array transducing array element;

211. a parallel straight-line section lead;

212. connecting section wires;

3. a magnetic unit;

51, 112, array transducer array elements;

52. a single magnet;

53, 115, connectors;

54, 111, packaging shell;

55. protecting the wear-resistant layer;

56, 113, a base;

57, 116, signal lines;

91. a soft magnetic body;

92. array element coils;

93. a detected object;

114. a magnet;

117. a periodic magnet.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Because the traditional piezoelectric ultrasonic phased array probe is difficult to meet the detection requirements of working conditions such as high-temperature online, rough surface condition, grinding and the like, the conventional electromagnetic ultrasonic probe can only carry out single-point detection and cannot carry out deflection control on sound beams, and the electromagnetic ultrasonic flaw detection is difficult to realize. Based on this, the embodiment of the present invention provides an electromagnetic ultrasonic phased array probe to solve the above problems.

Fig. 1 is a block diagram of an electromagnetic ultrasonic phased array probe according to an embodiment of the present invention, as shown in fig. 1, the electromagnetic ultrasonic phased array probe includes: encapsulation shell 1, phased array transducing element 2 and magnetic element 3, wherein, phased array transducing element 2 and magnetic element 3 set up in encapsulation shell 1, phased array transducing element 2 includes a plurality of linear arrangement's phased array transducing array element 21, phased array transducing array element 21 (also can be called transducing coil or array element coil) is the runway type conductive coil of following central line bilateral symmetry, magnetic element 3 is used for providing bias magnetic field, cover in phased array transducing element 2 tops, magnetic element's magnetic pole direction is perpendicular with phased array transducing element.

The multiple runway-type conductive coils are used as phased array transduction array elements, the transduction efficiency of the array elements can be greatly improved, the magnetic units provide bias magnetic fields, phased array acoustic beams such as deflection and focusing can be excited, and compared with an electromagnetic ultrasonic probe in the prior art, the method and the device can realize oblique incidence flaw detection.

For a better understanding of embodiments of the present invention, the phased array transducing unit 2 and the magnetic unit 3 are described in detail below with reference to the accompanying drawings.

Fig. 2 is a schematic diagram of a phased array transducer array element 21 according to an embodiment of the present invention, and as shown in fig. 2, the phased array transducer array element 21 is a racetrack type conductive coil, and the coil includes: parallel straight line segment conductors 211 located on both sides of the center line, and connecting segment conductors 212 connecting the parallel straight line segments.

Specifically, the main structure of the array element coil is symmetrical about a central line, the two sides of the main structure are provided with parallel long straight line section leads 211, the parallel straight line sections on the two sides of the central line are connected by connecting section leads 212 on the two ends, and the connecting section can be in any form, such as a semicircle, an arc, a straight line, a wave broken line, a sharp angle line and the like. The current input from the lead terminal flows in the same direction in the single-side wire symmetrical with the center line, and the current flows in the opposite direction in the opposite wire. The number of winding turns of the single array element coil can be 1 to N, and N is larger than or equal to 1. In actual operation, the coil can be wound or superposed in multiple layers in space, the number of the layers can be 1 to N, N is more than or equal to 1, and the specific N value can be determined according to actual requirements.

Fig. 3(a) and 3(b) are schematic diagrams of a phased array transducer unit 2 according to an embodiment of the present invention, and as shown in the figure, a plurality of racetrack array element coils are arranged along a straight line, so as to form an electromagnetic ultrasonic phased array probe. The main structural parameters of the electromagnetic ultrasonic phased array probe comprise: the width of a single array element is e, the center distance of the array elements is p, the gap of the array elements is g, the length of the array elements is h, and the number of the array elements is N, wherein the number of the array elements N can be set according to actual conditions (for example, is more than 6). When each runway type array element coil is excited to realize electromagnetic ultrasonic phased array detection, two excitation current modes are introduced into each array element, wherein one mode is that the excitation current directions of adjacent array element coils are the same, namely the excitation current directions of all array elements are the same, as shown in fig. 3 (a); the other is that the excitation current directions of adjacent array elements are opposite, as shown in fig. 3 (b).

In practical operation, the array element coil may be manufactured by Printed Circuit or winding (manual, automatic machine), wherein the Printed Circuit may be a PCB (Printed Circuit board) or an FPC (Flexible Printed Circuit).

In an embodiment of the invention, the magnet unit 3 provides the necessary bias magnetic field for the probe. In order to meet the actual detection requirement, there are two excitation modes of the array element coil, and according to different excitation modes, different forms of magnetic units 3 can be arranged to provide bias magnetic fields so as to excite and generate required ultrasonic waves in the detected object.

In order to realize ultrasonic transverse wave excitation, a bias magnetic field perpendicular to the array element coil or the surface of a detected workpiece needs to be provided, and in order to realize the electromagnetic ultrasonic phase control sound field sound beam control, the magnetic body form can be adopted, and comprises: one is a single magnet(s) and the other is a multi-pole magnet or a periodic magnet.

Specifically, when the directions of the excitation currents of the respective array element coils are set to be the same, the magnetic unit 3 may be a single magnet(s). Alternatively, the magnetic unit may comprise a plurality of combined magnet units (e.g. periodic magnets) comprising two magnets of opposite magnetic polarity, which respectively cover both sides of the centre line of the phased array transducing array element, and the number of combined magnet units is the same as the number of phased array transducing array elements.

Fig. 4 is a schematic diagram of an operation principle that the magnetic unit 3 is a single magnet (or single magnet) with the same direction of excitation current of each array element according to an embodiment of the present invention, and as shown in fig. 4, a bias magnetic field is provided by the single magnet, and the single magnet is located right above the phased array transduction coil and covers the entire phased array transduction coil. For the racetrack array element coil, the current flow directions on the left side and the right side are different, so that the eddy current field induced in a measured object has different flow directions, and the directions of the forces generated by the electromagnetic coupling in the area below the array element coil are opposite under the action of the bias magnetic field in the same direction as the whole.

Fig. 5 is a schematic structural diagram of an electromagnetic ultrasonic phased array probe for providing a bias magnetic field by a single magnet according to an embodiment of the present invention, and as shown in fig. 5, the phased array probe mainly includes: the phased array transducer comprises a phased array transducer array element 51 taking a runway type coil as an array element, a single magnet 52, a connector 53, a packaging shell 54, a protective wear-resistant layer 55 and a base 56. Wherein the magnet is mounted above the base and the phased array transducing array element 51 is arranged below the base.

Be provided with wear-resisting protective layer below phased array transducing array element, its structure can be single layer material or multilayer material composite construction for the sealed and protection array element coil of probe front end is in order to avoid damaging, and it has wear-resisting, hinders hot function, and protective layer thickness requirement is as thin as possible, in order to satisfy the phased array probe and to be examined the requirement of carrying away between the object. The protective layer can be arranged in other ways to realize the protection of the front end of the probe, such as space lift-off and the like. The wear-resistant protective layer can be a high-temperature-resistant protective layer so as to realize high-temperature online detection.

The connector 53 is arranged on the packaging shell 54, the phased array transducer array element 51 is connected with one end of the connector through a signal line 57, and the other end of the connector and an external signal line are connected to an instrument host.

In practice, the connector 53 is optional and may be omitted in the actual design of the probe. Specifically, one end of the signal wire can be directly connected with the array element coil lead wire, and the other end of the signal wire is directly connected with the instrument. All functional components of the phased array probe are finally integrated and packaged in the packaging shell, and integral sealing and protection are achieved.

Referring to fig. 5, the base 56 is disposed between the coil and the magnet, and may be of a predetermined thickness for maintaining a spacing between the array element coil and the magnet, the spacing being determined on a case-by-case basis and being effective to avoid self-oscillation and to maintain the coil in a specific uniform magnetic field. The base can be made of non-metal non-magnetic materials, and can be made of hard materials or soft materials. In practice, the base is optional and the spacing between the coil and the magnet may be achieved in other ways.

Preferably, a shielding film is provided at the end of the magnet adjacent the array coils to prevent the coils from inducing eddy currents in the magnet. The shielding film may be disposed on the base.

Fig. 6 is a schematic diagram of the working principle of the electromagnetic ultrasonic phased array probe according to the embodiment of the present invention, in which the periodic magnets provide a bias magnetic field, and as shown in fig. 6, the excitation current directions of the array element coils are set to be the same, and the periodic magnets form a periodic magnet unit with two magnets having opposite magnetic pole directions to provide a bias magnetic field for the racetrack array element coil, and the two magnets respectively cover two sides of the center line of the array element coil. For the whole phased array transducing coil, the whole periodic magnet is composed of the periodic magnet units with the same number as the array elements and provides bias magnetic fields for all the array elements. Under the action of the periodic magnet, the directions of acting forces generated by the left part and the right part of the racetrack array element coil through electromagnetic coupling in the object to be detected are the same.

Fig. 7 is a schematic structural diagram based on the electromagnetic ultrasonic phased array probe shown in fig. 6, and as shown in fig. 7, the overall structure is the same as that of a single magnet, and the greatest difference is that the magnet providing the bias magnetic field is a periodic magnet.

In one embodiment, when the excitation current directions of adjacent array element coils are set to be opposite, the magnet unit 3 may comprise a plurality of individual magnets covering portions of adjacent phased array transducing array elements where the excitation current directions are the same.

Fig. 8 is a schematic diagram of another working principle of the electromagnetic ultrasonic phased array probe in which the bias magnetic field is provided by the periodic magnet according to the embodiment of the invention, as shown in fig. 8, the excitation current directions of the coils of adjacent array elements are opposite, and the current directions of two sides of the coils of adjacent array elements, which are close to each other, are the same, as the current directions of the right side of the first array element and the left side of the second array element are the same in the figure. In this case, the periodic magnet is provided such that two array elements are close to each other and share one magnet in the same current direction, and the two coils at the two ends of the entire phased array probe are provided with the bias magnetic field at one side of the array element coil by using one magnet separately.

As can be seen from fig. 8, when a single magnet is used as the periodic magnet unit, the magnetic poles of the adjacent periodic magnet units are opposite to each other to constitute the entire periodic magnet. The periodic magnet units cover the parts of adjacent array elements with the same current direction, and the magnetic poles are perpendicular to the plane of the array element coil. For an electromagnetic ultrasonic phased probe with N array elements, N +1 periodic magnet units are required to make up the entire periodic magnet.

In particular implementations, the magnets may be hard or soft magnets. The hard magnet can adapt to different surface shapes (such as a plane and a curved surface) of the detected object through special customization, and the soft permanent magnet can adapt the electromagnetic ultrasonic phased array to the detected object with different surface shapes. As shown in fig. 9, in order to realize an electromagnetic ultrasonic phased array probe by using a soft magnet 91, a plurality of array element coils 92 arranged in a line shape are provided to match the surface of an object 93 to be detected, and the soft magnet matches the shape of the entire array element coil. In actual operation, the soft magnet can be adapted to an object to be inspected having a complex curved surface.

An example is given below, in which the structures of an electromagnetic ultrasonic phased array probe in which a bias magnetic field is provided by a single magnet and a periodic magnet are respectively given, and a simulation test is performed based on the two structures. In this example, the Magnet may be a Periodic Permanent Magnet (PPM).

Fig. 10 is an external view of an electromagnetic ultrasonic phased array probe according to an embodiment of the present invention, fig. 11 is a structural diagram of an electromagnetic ultrasonic phased array probe in which a bias magnetic field is provided by a single magnet according to an embodiment of the present invention, and fig. 12 is a structural diagram of an electromagnetic ultrasonic phased array probe in which a bias magnetic field is provided by a periodic magnet 117 according to an embodiment of the present invention.

As shown in fig. 10 to 12, the electromagnetic ultrasonic phased array probe using a runway coil as an array element mainly includes: package housing 111, phased array transducer coil 112, base 113, magnet 114, connector 115, signal lines 116, and the like.

In this example, the main parameters of the electromagnetic ultrasonic phased array probe are as follows:

the phased array transduction coil parameters are as follows: the number of turns of the winding of the array elements is 4, the width of the array elements is 2.86mm, the center distance of the array elements is 3.76mm, the number of the array elements is 10, and the overall size is 33.2 mm.

The single magnet parameters were: the width is 24mm, the height is 30mm, the length is 44mm, and the base thickness is 1.5 mm.

The periodic magnet parameters were: the number of the magnet units is 20, and the unit magnet size is 1.43mm in width, 30m in height and 24mm in length.

The following probes shown in fig. 11 and 12 are respectively used for performing electromagnetic ultrasonic phased array acoustic beam control simulation, wherein an excitation signal is a hanning window modulation sine wave with 3 periods and the frequency is 1MHz, and the specific simulation results are as follows:

(1) when a bias magnetic field is provided by a single permanent magnet as shown in fig. 11, the phased array probe excites the ultrasonic waves in the workpiece as follows:

(a) phased array deflection schematic: by setting a delay rule, delaying each channel, controlling the offset of the sound beam to be 45 degrees, and showing a simulation result as shown in fig. 13;

(b) phased array focusing schematic: the depth of focus is 30mm, and by setting the delay law, the synthesized focused sound beam is as shown in fig. 14.

(2) With the bias field provided by the periodic magnet as shown in fig. 12, the phased array probe excites the ultrasound waves in the workpiece as follows:

(a) phased array plane wave schematic: exciting all array elements simultaneously to obtain phased array plane waves, as shown in fig. 15;

(b) phased array deflection schematic: the delay law is set to realize the control of the phase control sound beam deflection by 45 degrees, and the simulation result is shown in fig. 16.

(c) Phased array focusing schematic: the depth of focus is 30mm, and by setting the delay law, the synthesized focused sound beam is as shown in fig. 17.

As can be seen from the above description, the electromagnetic ultrasonic phased array probe according to the embodiment of the invention adopts the runway type coil as the array element of the phased array probe, thereby greatly improving the energy conversion efficiency of the array element; the electromagnetic ultrasonic phased array probe provided by the embodiment of the invention can select magnets in different forms according to different working conditions, so that the requirements of field detection on different working conditions can be met, and phased array sound beams such as planes, deflection, focusing and the like can be excited by setting a time delay rule, so that the defect imaging detection of an electromagnetic ultrasonic linear phased array can be carried out.

It should be understood that the magnet involved in the present invention may be a permanent magnet or an electromagnet, and may be a single magnet, a multi-pole magnet or a combined periodic magnet according to the magnetic pole distribution of the magnet, and may be a hard or soft magnet according to the material of the magnet, and the present invention is not limited thereto.

When the electromagnetic ultrasonic phased array probe is realized by adopting the multi-pole magnet, the whole structure of the magnet is the same as that of a single magnet, the difference is that the multi-pole magnet is provided with a plurality of magnetic poles to form periodic magnetic poles, and the arrangement mode of the magnetic poles is the same as that of the periodic magnet.

The embodiment of the invention also provides an electromagnetic ultrasonic detection method, preferably, the method applies the electromagnetic ultrasonic phased array probe to detect the detected object, the energy conversion efficiency of the array elements can be greatly improved through a plurality of runway type array element coils of the electromagnetic ultrasonic phased array probe, phased array sound beams such as deflection and focusing can be excited through a bias magnetic field provided by a magnetic unit, and the electromagnetic ultrasonic phased array detection can be realized.

In summary, the embodiments of the present invention provide an electromagnetic ultrasonic linear phased array probe with a runway type coil as an array element, and compared with an electromagnetic ultrasonic probe in the prior art, the embodiments of the present invention can improve the energy conversion efficiency of the array element by using a plurality of runway type array element coils; by adopting magnets in different forms, the requirements of field detection on different working conditions can be met; in addition, in actual operation, phased array sound beams such as planes, deflection, focusing and the like can be excited by setting a time delay rule to perform electromagnetic ultrasonic linear phased array defect imaging detection, and the technical problem that the conventional electromagnetic ultrasonic probe cannot be applied to flaw detection is solved.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the hardware + program class embodiment, since it is substantially similar to the method embodiment, the description is simple, and the relevant points can be referred to the partial description of the method embodiment.

The foregoing description has been directed to specific embodiments of this disclosure. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing may also be possible or may be advantageous.

Although the present application provides method steps as described in an embodiment or flowchart, additional or fewer steps may be included based on conventional or non-inventive efforts. The order of steps recited in the embodiments is merely one manner of performing the steps in a multitude of orders and does not represent the only order of execution. When an actual apparatus or client product executes, it may execute sequentially or in parallel (e.g., in the context of parallel processors or multi-threaded processing) according to the embodiments or methods shown in the figures.

The systems, devices, modules or units illustrated in the above embodiments may be implemented by a computer chip or an entity, or by a product with certain functions. One typical implementation device is a computer. In particular, the computer may be, for example, a personal computer, a laptop computer, a vehicle-mounted human-computer interaction device, a cellular telephone, a camera phone, a smart phone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.

The terms "comprises," "comprising," or any other variation thereof, in the embodiments of this specification are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the presence of additional identical or equivalent elements in a process, method, article, or apparatus that comprises the recited elements is not excluded.

For convenience of description, the above devices are described as being divided into various modules by functions, and are described separately. Of course, in implementing the embodiments of the present description, the functions of each module may be implemented in one or more software and/or hardware, or a module implementing the same function may be implemented by a combination of multiple sub-modules or sub-units, and the like. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

Those skilled in the art will also appreciate that, in addition to implementing the controller as pure computer readable program code, the same functionality can be implemented by logically programming method steps such that the controller is in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers and the like. Such a controller may therefore be considered as a hardware component, and the means included therein for performing the various functions may also be considered as a structure within the hardware component. Or even means for performing the functions may be regarded as being both a software module for performing the method and a structure within a hardware component.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.

The memory may include forms of volatile memory in a computer readable medium, Random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). Memory is an example of a computer-readable medium.

Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.

As will be appreciated by one skilled in the art, embodiments of the present description may be provided as a method, system, or computer program product. Accordingly, embodiments of the present description may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present description may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and so forth) having computer-usable program code embodied therein.

The embodiments of this specification may be described in the general context of computer-executable instructions, such as program modules, being executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. The described embodiments may also be practiced in distributed computing environments where tasks are performed by remote processing devices that are linked through a communications network. In a distributed computing environment, program modules may be located in both local and remote computer storage media including memory storage devices.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the specification. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

The above description is only an example of the embodiments of the present disclosure, and is not intended to limit the embodiments of the present disclosure. Various modifications and variations to the embodiments described herein will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of the present specification should be included in the scope of the claims of the embodiments of the present specification.

Claims (15)

1. An electromagnetic ultrasonic phased array probe, electromagnetic ultrasonic phased array probe includes encapsulation shell, its characterized in that, electromagnetic ultrasonic phased array probe still includes: a phased array transducer unit and a magnetic unit disposed within the package housing, wherein,

the phased array transduction unit includes: a plurality of phased array transduction array elements which are linearly arranged, wherein the phased array transduction array elements are runway-shaped conductive coils which are symmetrical along the two sides of a central line,

the magnetic unit is used for providing a bias magnetic field and covering the phased array energy conversion unit, and the magnetic pole direction of the magnetic unit is perpendicular to the phased array energy conversion unit.

2. The electromagnetic ultrasonic phased array probe of claim 1, wherein the racetrack-type conductive coil comprises:

parallel straight-line segment conductors on both sides of the center line, an

And the connecting section lead is connected with the parallel straight-line sections.

3. The electromagnetic ultrasonic phased array probe of claim 2, wherein the connecting segment wire is shaped as one of:

semi-circle, arc, straight line, wave broken line, sharp angle line.

4. An electromagnetic ultrasonic phased array probe according to claim 1, wherein the direction of the excitation current of each phased array transducing array element is set to be the same.

5. An electromagnetic ultrasonic phased array probe according to claim 4, wherein the magnetic unit is a single magnet.

6. An electromagnetic ultrasonic phased array probe according to claim 4, wherein the magnetic unit comprises a plurality of combined magnet units, the combined magnet units comprise two magnets with opposite magnetic poles, the two magnets respectively cover two sides of the central line of the phased array transducing array element,

the number of the combined magnet units is the same as that of the phased array transduction array elements.

7. An electromagnetic ultrasonic phased array probe according to claim 1, wherein the excitation current directions of adjacent phased array transducing array elements are arranged to be opposite.

8. The electromagnetic ultrasonic phased array probe of claim 7, wherein the magnetic unit comprises a plurality of individual magnets,

the single magnet covers the parts of the adjacent phased array transduction array elements with the same excitation current direction.

9. The electromagnetic ultrasonic phased array probe of claim 1, further comprising:

a base of a predetermined thickness disposed between the phased array transducer unit and the magnetic unit,

the base includes a shielding film disposed between the base and the magnetic unit.

10. An electromagnetic ultrasonic phased array probe according to claim 9, wherein the base is a non-metallic, non-magnetic material.

11. The electromagnetic ultrasonic phased array probe of claim 1, further comprising:

and the protective layer is arranged between the phased array transduction unit and the detected object so as to protect the phased array transduction unit.

12. An electromagnetic ultrasonic phased array probe according to claim 11, wherein the protective layer is a high temperature resistant protective layer.

13. The electromagnetic ultrasonic phased array probe of claim 1, further comprising:

the connector, set up in on the encapsulation shell, the one end of connector with phased array transducer unit passes through signal lead connection, the other end and the check out test set of connector pass through external signal line connection.

14. An electromagnetic ultrasonic phased array probe according to claim 1, when the surface of the object to be detected is a curved surface, characterized in that the plurality of phased array transducing elements arranged linearly of the phased array transducing elements are arranged to match the surface of the object to be detected, and the magnetic element is a soft magnet matching the shape of the phased array transducing elements.

15. An electromagnetic ultrasonic detection method, characterized in that the method applies the electromagnetic ultrasonic phased array probe of any one of claims 1 to 14 to detect the detected object.

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