CN212281410U - Ultrasonic sensor, ultrasonic synchronous electrode and composite three-dimensional electrode - Google Patents
Ultrasonic sensor, ultrasonic synchronous electrode and composite three-dimensional electrode Download PDFInfo
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- CN212281410U CN212281410U CN202022362151.5U CN202022362151U CN212281410U CN 212281410 U CN212281410 U CN 212281410U CN 202022362151 U CN202022362151 U CN 202022362151U CN 212281410 U CN212281410 U CN 212281410U
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Abstract
The utility model relates to the field of medical equipment, particularly, relate to an ultrasonic transducer, supersound synchronous electrode and three-dimensional electrode of combined type. The ultrasonic sensor comprises a matching layer, a piezoelectric layer and a back lining layer; the matching layer, the piezoelectric layer and the back lining layer are sequentially stacked; the piezoelectric layer is used for converting an electrical signal into an ultrasonic vibration signal, the matching layer is used for sending and receiving the ultrasonic vibration signal, and the backing layer is used for blocking the ultrasonic vibration signal. The ultrasound synchronization electrode includes at least one ultrasound sensor. The composite stereo electrode comprises a rod-shaped main body and at least one ultrasonic sensor. The utility model discloses in, the ultrasonic vibration signal sends from the lower matching layer of acoustic impedance to carry out the feedback through the matching layer and receive the signal that sends, realize ultrasonic monitoring function, and then make whole volume reduce, can carry out the intracranial monitoring, and monitor the brain deep part, improved monitoring signal's quality.
Description
Technical Field
The utility model relates to the field of medical equipment, particularly, relate to an ultrasonic transducer, supersound synchronous electrode and three-dimensional electrode of combined type.
Background
Under normal conditions, the surface of the cortex of the human brain can generate weak bioelectric signals and has certain regularity. When pathological changes occur to the brain, the discharge mode of the brain electrical signals can change obviously, and certain pathological changes can cause special changes to the discharge mode of the brain electrical signals. The most common case currently diagnosed and treated by electroencephalography for brain disease is epilepsy. Epilepsy refers to the condition that abnormal discharge of cerebral cortex causes seizure and tetany of patients or abnormal consciousness behaviors, and electroencephalogram of patients is different from that of normal people and has special changes no matter whether seizures occur or not, so electroencephalogram examination plays a very important role in clinical treatment of epilepsy. Meanwhile, in the brain tumor resection, real-time electroencephalogram monitoring plays an important auxiliary role in completely removing focus, protecting a functional area better and improving the prognosis of a patient. For clinical scientific research, the brain electrical signal activity at different positions can help human to understand and interpret the brain operation rule better.
The intracranial cortex electrode is placed on the surface of the cerebral cortex and can directly receive the electric signal of the normal position of the cerebral cortex. The electroencephalogram signals acquired by the method are almost free of attenuation and artifact, and the range of epileptic focus can be accurately positioned, so that the intracranial cortex electrode is an essential tool for accurate electroencephalogram monitoring.
The intracranial cortex electrode is placed under intracranial dura mater through a surgical operation, and an intracerebral electric signal is transmitted into the brain wave signal receiving device through the electrode, so that the aims of accurately detecting the brain wave signal and accurately judging the position of an intracranial focus are achieved. The intracranial cortex electrode is mainly divided into a strip cortex electrode and a sheet cortex electrode. Strip cortical electrodes can be placed on the cortical surface for recording, they can be either drilled into the subdural space or placed under the margin of the craniotomy window. The sheet-like cortical electrode is typically placed on the cortical surface after a large craniotomy technique, and in addition to its cortical surface recording function, it can also be used for cortical electrostimulation studies.
In the field of ultrasound, a functional ultrasound method proposed in recent years can realize real-time detection of cerebral blood flow changes in a certain depth, but the existing monitoring electrode comprises a pulse transmitting and receiving system, a transducer and a probe, the whole volume of the existing monitoring electrode is large, the existing monitoring electrode can only monitor outside a skull, the placement density is low due to the large volume, the deep part of the brain cannot be monitored, and the quality of monitored signals is low.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an ultrasonic transducer, supersound synchronous electrode and three-dimensional electrode, its volume is less, can carry out the intracranial monitoring, can monitor the deep brain, has improved monitoring signal's quality.
The technical scheme of the utility model is like this:
in a first aspect, the present invention provides an ultrasonic sensor, which includes:
a matching layer, a piezoelectric layer, and a backing layer;
the matching layer, the piezoelectric layer and the backing layer are sequentially stacked;
the piezoelectric layer is used for converting an electrical signal into an ultrasonic vibration signal, the matching layer is used for sending and receiving the ultrasonic vibration signal, and the backing layer is used for blocking the ultrasonic vibration signal.
Preferably, the matching layer is made of a conductive material, and the matching layer is used for enabling the ultrasonic sensor to have a function of acquiring a bioelectrical signal.
Preferably, the conductive material comprises at least one of graphite, silver paste, stainless steel, platinum-iridium alloy, nichrome, gold, or polyethylene dioxythiophene.
Preferably, the connection mode of the matching layer and the piezoelectric layer comprises at least one of bonding, welding, curing after coating the piezoelectric layer by the matching layer through fluid, vapor deposition, electroplating or curing after painting.
Preferably, the matching layer is used for connecting with a positive electrode of a power supply.
In a second aspect, the present invention further provides an ultrasound synchronization electrode, which includes at least one ultrasound sensor as described in any one of the above.
Preferably, the ultrasonic synchronization electrode further comprises a flexible substrate, and the ultrasonic sensor is disposed in the flexible substrate.
In a third aspect, the present invention further provides a composite three-dimensional electrode, which includes a rod-shaped main body and at least one ultrasonic sensor described in any one of the above;
the ultrasonic sensor is disposed in the rod-like body.
Preferably, the rod-shaped body is further provided with a macro electrode.
Preferably, the rod-shaped body is further provided with a microelectrode.
The utility model has the advantages that:
in ultrasonic sensor, regard the piezoelectric layer as ultrasonic transducer, convert the electric energy into ultrasonic vibration signal, ultrasonic vibration signal sends from the lower matching layer of acoustic impedance to carry out the feedback through the matching layer and receive the signal that sends, realize ultrasonic monitoring function, and then make whole volume reduce, can carry out the intracranial monitoring, and monitor the deep part of brain, improved monitoring signal's quality.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of an ultrasonic sensor provided in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an ultrasonic synchronization electrode according to an embodiment of the present invention;
fig. 3 is a schematic cross-sectional structure view of an ultrasonic synchronization electrode according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an ultrasonic synchronization electrode in another arrangement according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a three-dimensional electrode according to an embodiment of the present invention.
Description of the main element symbols:
1-a matching layer; 2-a piezoelectric layer; 3-backing layer; 4-positive line; 5-a negative electrode line; 6-a flexible substrate; 7-an ultrasonic sensor; 8-a rod-shaped body; 9-a macro electrode; 10-microelectrode.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying 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. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Some embodiments of the present invention will be described in detail below with reference to fig. 1 to 5. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
The utility model provides an ultrasonic sensor, it includes:
matching layer 1, piezoelectric layer 2 and backing layer 3;
the matching layer 1, the piezoelectric layer 2 and the back lining layer 3 are sequentially stacked;
the piezoelectric layer 2 is used to convert electrical signals into ultrasonic vibration signals, the matching layer 1 is used to send and receive ultrasonic vibration signals, and the backing layer 3 is used to block ultrasonic vibration signals.
In this embodiment, the positive electrode of the pulse power supply is connected with the matching layer 1, the negative electrode of the pulse power supply is connected with the backing layer 3, when the ultrasonic sensor monitors the brain, the pulse power supply can apply voltage to the ultrasonic sensor in a pulse form, and the time of a single pulse is short, so that no voltage exists on the matching layer 1 and the positive electrode wire 4 connected with the matching layer in most of the time, and the time window allows time for electroencephalogram monitoring.
Therefore, when the matching layer 1 is used as an electroencephalogram electrode, the effects of simultaneously monitoring electroencephalogram activity and ultrasonic signal release and monitoring can be achieved.
Specifically, after the matching layer 1, the piezoelectric layer 2 and the backing layer 3 are sequentially stacked, the positive electrode line 4 and the negative electrode line 5 which respectively connect the matching layer 1 and the backing layer 3 to a power supply are passed, and under the action of a pulse power supply, the piezoelectric layer 2 in the middle has the effect of an ultrasonic transducer.
An ultrasonic transducer is an energy conversion device, and its function is to convert the input electric power into mechanical power (i.e. ultrasonic wave) and then transmit it, and also to convert the received ultrasonic wave into electric power, and it consumes little power by itself.
In the ultrasonic transducer, an alternating voltage with a resonant frequency is applied to the piezoelectric layer 2, the piezoelectric material resonates to generate ultrasonic waves, however, the acoustic impedance of the piezoelectric materials such as PZT5, PZT4 and PZT8 is large, about 35 × 106N.S/m3, and 1.5 × 106N.S/m in water, the ultrasonic wave transmission is difficult due to the difference of the acoustic impedances, so that the acoustic impedance material between the piezoelectric material and the underwater acoustic impedance is used as the matching layer 1, and the acoustic waves can be effectively emitted on the emitting surface. While the other side requires as little sound waves as possible to be transmitted, a material with a relatively high sound attenuation is used as the backing layer 3.
The positive electrode wire 4 or the negative electrode wire 5 of the transducer provides the transducer transmitting voltage to receive the echo voltage, and the positive electrode wire and the negative electrode wire are simultaneously used as the lead-out wires of the electrodes, because the ultrasonic frequency is certainly greater than 20kHz, the general imaging is about 5-20MHz, and the EEG signal frequency is lower than 100Hz, the two signals can be easily separated through filtering, and a wire can be separately led out for outputting the electrode signals.
Preferably, in the embodiment, the pulse frequency of the pulse power supply is 8MHz-50 MHz.
In the present embodiment, the matching layer is made of a conductive material, and the matching layer 1 is used to provide the function of acquiring bioelectrical signals for the ultrasonic sensor.
The matching layer is made of a conductive material, so that the matching layer 1 has the functions of transmitting and receiving ultrasonic vibration signals and receiving electrophysiological activity signals of brain tissues, and the electrophysiological activity signals are transmitted to the electroencephalogram monitoring equipment through the positive electrode wire of the pulse power supply connected with the matching layer 1.
By means of the arrangement, the ultrasonic monitoring and the brain wave monitoring are synchronously carried out, the overall monitoring accuracy and the quality of monitoring signals are improved, the two monitoring sensors are combined on one structure, the overall structure is small, high-density electrode point monitoring can be carried out, and the quality of the monitoring signals is further improved.
In a specific use, only the ultrasonic function of the matching layer 1 or only the function of the matching layer 1 for receiving the electrophysiological activity signal may be used, and the specific use requirements may be specifically set according to a specific use scenario.
Preferably, in this embodiment, the material of the matching layer 1 includes at least one of graphite, silver paste, stainless steel, platinum-iridium alloy, nichrome, gold, or polyethylene dioxythiophene; the piezoelectric layer 2 is made of a piezoelectric material.
Specifically, materials such as graphite, silver paste, stainless steel, platinum-iridium alloy, nichrome, gold, polyethylene dioxythiophene, and the like have low acoustic impedance, and can well emit the vibration sound emitted by the piezoelectric layer 2 into the body.
In this embodiment, besides the metal material, other materials such as graphite, silver paste, etc. may be used alone or in combination.
It is to be noted that the material of the matching layer 1 may be the above-mentioned ones, but it is not limited to the above-mentioned ones as long as the acoustic impedance of the matching layer 1 is lower than that of the piezoelectric layer 2.
Piezoelectric materials are crystalline materials that develop a voltage across their two terminals when subjected to a compressive force.
The existing piezoelectric materials are mainly divided into inorganic piezoelectric materials and organic piezoelectric materials, wherein the inorganic piezoelectric materials mainly comprise piezoelectric crystals and piezoelectric ceramics, and the organic piezoelectric materials mainly comprise piezoelectric polymers such as polyvinylidene fluoride and the like.
In this embodiment, the connection manner of the matching layer 1 and the piezoelectric layer 2 is as follows: bonding, soldering, coating the piezoelectric layer 2 with the fluid matching layer 1 and curing, vapor deposition, plating or painting.
In this embodiment, the matching layer 1 may be connected to the piezoelectric layer 2 by bonding or welding, or may be liquefied and then the liquefied fluid matching layer 1 is coated on the upper surface of the piezoelectric layer 2, followed by cooling and curing, or may be formed by vapor deposition, electroplating, painting, or other connection methods, as long as the matching layer 1 and the piezoelectric layer 2 can be connected together.
The ultrasonic sensor 7 is in a columnar shape, and the positive pole and the negative pole of the pulse power supply are respectively connected to two ends of the columnar shape.
Specifically, in the present embodiment, the ultrasonic sensor 7 has a square column shape, and more specifically, has a size in the range of 0.5 × 0.5 × 0.5mm to 3 × 2 × 1 mm.
It should be noted that the columnar ultrasonic sensor 7 may also be a cylindrical or other columnar structure.
In a second aspect, the present invention provides an ultrasonic synchronization electrode comprising at least one ultrasonic sensor of any one of the above.
By using the ultrasonic sensor, the ultrasonic synchronous electrode has the ultrasonic monitoring function and the electroencephalogram monitoring function at the same time, and the practicability of the ultrasonic synchronous electrode is improved.
Specifically, in the present embodiment, as shown in fig. 2 and 4, the ultrasound synchronization electrode further includes a flexible substrate; an ultrasonic sensor 7 is disposed in the flexible substrate 6.
Specifically, in the present embodiment, the ultrasonic sensors 7 described above are provided in the flexible substrate 6, and when the ultrasonic sensors 7 are plural, they are connected integrally by the flexible substrate 6.
More specifically, the flexible substrate 6 has good flexibility, which can reduce the damage to the human tissue when entering the human tissue, and improve the safety of the operation.
More specifically, in the present embodiment, the material of the flexible substrate 6 is a porous material, which may be polyurethane, polytetrafluoroethylene, hydrogel, silicone, etc.
Preferably, the ultrasonic sensors 7 are distributed in a regular array, such as a rectangular array of a plurality of ultrasonic sensors 7 on the flexible substrate 6.
Specifically, in the present embodiment, the ultrasonic sensors 7 are disposed on the flexible substrate 6 in a single-row linear arrangement, and more specifically, may be linear, as shown in fig. 2, or may be arc-shaped.
Specifically, in the present embodiment, the array arrangement may be a rectangular array, as shown in fig. 4, or a circular array, or a triangular array, etc., as long as the ultrasonic sensors 7 can be arranged on the flexible substrate 6.
Preferably, the ultrasonic sensor 7 is disposed embedded on the flexible substrate 6.
In the present embodiment, an insertion groove is provided on the flexible substrate 6, and the ultrasonic sensor 7 is disposed in the insertion groove and fixed by the insertion groove.
Specifically, after the ultrasonic sensor 7 is embedded in the flexible substrate 6, the surface of the ultrasonic sensor 7 is flush with the surface of the flexible substrate 6, so that no discomfort is caused during use, and the overall volume is reduced.
In this embodiment, the embedding manner may also be to set a through hole on the flexible substrate 6, embed the ultrasonic sensor 7 in the through hole, and the two end surfaces of the ultrasonic sensor 7 are flush with the upper and lower side surfaces of the flexible substrate 6, which not only can ensure the connection stability of the plurality of ultrasonic sensors 7, but also further reduce the volume of the whole ultrasonic synchronization electrode.
It should be noted that the ultrasonic sensor 7 may be disposed on the flexible substrate 6 by embedding, but it is not limited to this case, and it is also possible to dispose the ultrasonic sensor 7 on the flexible substrate 6 by using other methods.
Specifically, in the present embodiment, the ultrasonic sensor 7 is embedded in the flexible substrate 6 and then fixed by bonding or clipping.
When the ultrasonic sensor 7 is embedded on the flexible substrate 6, it is necessary to fix the ultrasonic sensor 7 so as to prevent the ultrasonic sensor 7 from being detached from the embedded groove or through hole of the flexible substrate 6.
Specifically, after the ultrasonic sensor 7 is embedded in the flexible substrate 6, the ultrasonic sensor 7 may be fixedly connected to the flexible substrate 6 by bonding. During bonding, the periphery of the ultrasonic sensor 7 can be coated with the adhesive, and then the ultrasonic sensor 7 is embedded into the flexible substrate 6, so that the bonding effect is realized; alternatively, the adhesive may be coated on the inner wall of the insertion groove or the through hole of the flexible substrate 6, and then the ultrasonic sensor 7 may be inserted into the flexible substrate 6.
Specifically, the ultrasonic sensor 7 may also be fixed on the flexible substrate 6 by means of a snap-fit. If the area of the backing layer 3 is larger than that of the piezoelectric layer 2, the backing layer 3 in the ultrasonic sensor 7 protrudes from the side wall, and the embedded groove on the flexible substrate 6 is set to be a T-shaped groove matched with the ultrasonic sensor 7, so that the ultrasonic sensor 7 is clamped in the embedded groove, and the ultrasonic sensor 7 is fixed.
It should be noted that the fixing manner of the ultrasonic sensor 7 on the flexible substrate 6 may be an adhesive or a snap, but it is not limited to the adhesive or the snap, and it may also be another fixing and connecting manner as long as it can fix the ultrasonic sensor 7 on the flexible substrate 6.
Specifically, in the present embodiment, the flexible substrate 6 is injection molded.
More specifically, the ultrasonic sensors 7 may be first placed at the designated positions in the mold according to the required array shape, then the flexible material is poured into the mold, and finally the flexible material is cured to obtain the solid flexible substrate 6, and the fixing of the ultrasonic sensors 7 on the flexible substrate 6 is synchronously achieved.
In a third aspect, the present invention further provides a three-dimensional electrode, which comprises a rod-shaped main body 8 and at least one ultrasonic sensor 7 of any one of the above mentioned aspects; the ultrasonic sensor 7 is disposed in the rod-like body 8.
By providing the ultrasonic sensor 7 in the rod-shaped body 8, the depth of the ultrasonic sensor 7 entering the inside of the human tissue can be increased, and further, a part such as a deep part of the brain can be monitored.
Preferably, in the present embodiment, the rod-shaped body 8 is further provided with a macro electrode 9.
Specifically, in the present embodiment, the macro-electrode 9 is disposed on the side wall of the rod-shaped main body 8, and the macro-electrode is used for collecting electroencephalogram signals of brain cell clusters.
More specifically, the stereo electrode provided in this embodiment is a composite electrode, which includes not only the ultrasonic sensor 7, but also the macro electrode 9, and the macro electrode 9 is annular in external shape, and is sleeved on the outer wall of the rod-shaped main body 8. By providing the macro electrode 9, it is possible to detect clustered discharge in the contacted cell region.
In this embodiment, the number of the macro electrodes 9 may be one or more.
Preferably, in the present embodiment, a microelectrode 10 is further disposed on the rod-shaped body 8.
Specifically, in the present embodiment, the micro-electrode 10 may be disposed at any position of the rod-shaped body 8, such as a side wall or an end portion, which is mainly used for collecting discharge of a single neuron.
More specifically, in the present embodiment, the microelectrode 10 is formed by a wire electrode protruding from the outer wall of the rod-like body 8, and a plurality of wire electrodes jointly form a bundle of wires positioned in the hollow channel of the rod-like body 8. One end of the tow is connected to the proximal end of the rod-shaped body 8, and the distal end extends out of the micropores in the side wall or end of the rod-shaped body, so that the electrical activity of single cells can be detected.
In the embodiment, the three-dimensional electrode integrating the ultrasonic sensor 7, the macro-electrode 9 and the micro-electrode 10 can effectively alleviate the technical problems that the implementation difficulty of simultaneously detecting the clustered discharge activity of the cell area and the discharge activity of a single cell is high, and the detected electric signal is difficult to accurately correspond to the position of the single cell in the prior art.
In a fourth aspect, the present invention further provides a method for using the ultrasonic sensor, which detects the cerebral blood flow signal of the human body through the ultrasonic signal.
The cerebral blood flow signal of the human brain is monitored through the ultrasonic signal, so that the change of brain activity can be reflected according to the change of the cerebral blood flow, and whether pathological changes occur or not can be judged, such as whether epilepsy occurs or not can be judged.
Preferably, the matching layer 1 of the ultrasonic sensor 7 is made of a conductive material, so that the ultrasonic sensor 7 has a function of acquiring a bioelectrical signal.
Through dual monitoring, the accuracy of monitoring can be improved.
The utility model has the advantages that:
in ultrasonic sensor 7, regard piezoelectric layer 2 as the transducer of ultrasonic wave, through the intermittent voltage that pulse power supply provided for piezoelectric layer 2 produces the vibration, and the vibration sound wave is sent from the lower matching layer 1 of acoustic impedance, realizes ultrasonic monitoring function, and then makes whole volume reduce, can make the synchronous electrode of supersound carry out intracranial monitoring, and can monitor the deep brain, the density increase of the synchronous electrode of supersound has improved monitoring signal's quality.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An ultrasonic sensor, comprising:
a matching layer, a piezoelectric layer, and a backing layer;
the matching layer, the piezoelectric layer and the backing layer are sequentially stacked;
the piezoelectric layer is used for converting an electrical signal into an ultrasonic vibration signal, the matching layer is used for sending and receiving the ultrasonic vibration signal, and the backing layer is used for blocking the ultrasonic vibration signal.
2. The ultrasonic sensor of claim 1, wherein the matching layer is a conductive material, and the matching layer is used for providing the ultrasonic sensor with a function of acquiring a bioelectrical signal.
3. The ultrasonic sensor of claim 2, wherein the conductive material comprises at least one of graphite, silver paste, stainless steel, platinum iridium, nickel chromium, gold, or polyethylene dioxythiophene.
4. The ultrasonic sensor of claim 1, wherein the matching layer is attached to the piezoelectric layer by at least one of bonding, welding, curing after coating the piezoelectric layer with a fluid, vapor depositing, plating, or painting.
5. The ultrasonic sensor of claim 1, wherein the matching layer is configured to be connected to a positive power supply.
6. An ultrasound synchronization electrode, characterized in that it comprises at least one ultrasound sensor according to any of claims 1 to 5.
7. The ultrasonically synchronized electrode of claim 6, further comprising a flexible substrate, the ultrasonic sensor being disposed in the flexible substrate.
8. A composite volumetric electrode comprising a rod-like body and at least one ultrasonic transducer according to any one of claims 1 to 5;
the ultrasonic sensor is disposed in the rod-like body.
9. The composite stereoscopic electrode of claim 8, wherein the rod-shaped body is further provided with a macro electrode thereon.
10. The composite stereoscopic electrode of claim 8, wherein the rod-shaped body is further provided with a microelectrode.
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| WO2023028450A1 (en) * | 2021-08-27 | 2023-03-02 | Baker Hughes Oilfield Operations Llc | Piezoelectric ceramic crystals integrating an impedance matching region and a backing region, methods of designing piezoelectric ceramic crystals, and methods of forming piezoelectric ceramic crystals |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023028450A1 (en) * | 2021-08-27 | 2023-03-02 | Baker Hughes Oilfield Operations Llc | Piezoelectric ceramic crystals integrating an impedance matching region and a backing region, methods of designing piezoelectric ceramic crystals, and methods of forming piezoelectric ceramic crystals |
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