Double-source ultrasonic sensor probe core and double-source ultrasonic sensor thereof

Abstract

The utility model relates to a double-source ultrasonic sensor probe core and a double-source ultrasonic sensor thereof. The double-source ultrasonic sensor probe core comprises a shell, a partition plate and two piezoelectric elements, the shell is provided with a cavity with an opening formed in the front end face of the shell, the cross section outline of the cavity comprises two opposite straight line sections, two opposite outer arcs and four transition arcs, each outer arc is in the shape of an arc protruding towards the outer side of the cavity, and the four transition arcs are arranged at the corner combination positions of the two straight line sections and the two outer arcs respectively. The partition plate is arranged in the cavity, the top surface of the partition plate is lower than the opening part of the cavity, the bottom of the partition plate is connected with the bottom surface of the cavity, the partition plate is connected with the side surface part of the cavity where the two straight line sections are located to form two sub-cavities, and the cross section of each sub-cavity is composed of an outer arc, two transition arcs adjacent to the outer arc and a partition plate side surface contour line; the contour line of the side face of the partition plate is composed of a middle arc and two end arcs. According to the utility model, the obstacle identification capability is strong, and the decoupling performance is good.

Description

Technical Field

[0001] This utility model relates to ultrasonic sensor technology. Background Technology

[0002] An ultrasonic sensor comprises a housing made of metal and a piezoelectric component. The ultrasonic sensor housing has a cavity open at one end, within which the piezoelectric component is disposed. The piezoelectric element (e.g., a piezoelectric ceramic plate) within the piezoelectric component is fixed to the bottom surface of the cavity (i.e., fixed to the base plate of the ultrasonic sensor housing). When current flows through the piezoelectric component, it converts electrical energy into mechanical energy, causing deformation of the base plate of the ultrasonic sensor housing (also called a diaphragm), emitting ultrasonic waves. When the ultrasonic waves encounter an obstacle, they are reflected back to the ultrasonic sensor. By analyzing the time difference between the received and emitted ultrasonic waves, physical information such as the distance and size of the obstacle can be determined.

[0003] Currently, most ultrasonic sensors used in reversing radars or for detecting obstacles around vehicles only have one piezoelectric element. They can only determine the presence of obstacles based on the intensity of a single signal echo, and cannot accurately determine the size or height of obstacles, requiring other sensing devices to assist in obstacle detection. Chinese patent application number 201480017488.7, entitled "Sensor Device and Method for Detecting the Surrounding Environment of a Vehicle," discloses a 3D ultrasonic sensor probe. This 3D ultrasonic sensor probe includes one piezoelectric element and multiple electret sensor elements, and has a one-to-many transmitting and multiple-to-receiving function. However, this 3D ultrasonic sensor probe suffers from drawbacks such as complex structure, difficulty in manufacturing, and significant ultrasonic energy loss.

[0004] The paper "Design of a phase array ultrasonic sensor using vibration-decoupled concept," published in the June 2008 issue of the Acoustical Society of America, describes an ultrasonic sensor probe, such as... Figure 1 As shown, the ultrasonic sensor probe includes a housing 1a and two piezoelectric elements ( Figure 1The housing 1a has a dumbbell shape cavity 100a (not shown) including two kidney shape sub-cavities 11a and a middle gap 12a connecting the two kidney shape sub-cavities 11a, and two piezoelectric elements are respectively arranged in the two sub-cavities 11a. The outer arcs 111a of the two sub-cavities 11a are located on the same circumference. However, the decoupling performance of the ultrasonic sensor probe is not good, and there is still room for improvement. The meaning of decoupling is that the vibration mode of the single-sided piezoelectric element does not affect the other piezoelectric element under the working condition by using the structural design. SUMMARY

[0005] The technical problem to be solved by the utility model is to provide a double-source ultrasonic sensor probe and a double-source ultrasonic sensor thereof, which have strong obstacle recognition ability, good decoupling performance, simple structure and easy manufacturing.

[0006] In a first aspect, the utility model provides a kind of double-source ultrasonic sensor probe, including shell, baffle and two piezoelectric elements;The shell has cavity opening in the front end surface of shell, and cavity is enclosed by cavity bottom and cavity side, and the cross-sectional profile of cavity has first symmetry axis and second symmetry axis;Baffle is arranged in cavity, and the top surface of baffle is lower than the mouth of cavity, and the bottom of baffle is connected with cavity bottom, and the two ends of baffle are respectively connected with the two opposite sides of cavity side, and two sub-cavities that do not communicate with each other are formed in cavity;Two piezoelectric elements are respectively arranged in two sub-cavities, and fixed on cavity bottom;Wherein, the cross-sectional profile of cavity includes two opposite straight line segments, two opposite outer arcs and four transition arcs, the shape of each outer arc is the arc that protrudes to the outside of cavity, and four transition arcs are respectively arranged at the corner junction of two straight line segments and two outer arcs, and the two ends of each transition arc are respectively tangent to the adjacent outer arc and straight line segment;First symmetry axis bisects two straight line segments, and second symmetry axis bisects two outer arcs;The two ends of baffle are respectively connected with the cavity side part of two straight line segments, and the opposite sides of baffle are concave towards each other, and baffle is symmetrical about first symmetry axis and second symmetry axis;The cross-sectional profile of each sub-cavity is composed of one outer arc, two transition arcs adjacent to the one outer arc and the profile line of the side of baffle opposite to the one outer arc;The profile line of the side of baffle is composed of one middle arc and two end arcs, the two ends of middle arc are respectively tangent to one end of two end arcs, the other end of two end arcs is respectively connected with two transition arcs, and two end arcs are respectively symmetrical about connecting line P1P2 with two transition arcs, wherein, P1 is the intersection of one straight line segment, one transition arc and one end arc, and P2 is the intersection of another straight line segment, another transition arc and another end arc.

[0007] The utility model provides a double -source ultrasonic sensor, it includes the double -source ultrasonic sensor probe core of preceding.

[0008] The utility model has at least the following advantages:

[0009] 1、 the double -source ultrasonic sensor probe core and its double -source ultrasonic sensor of the utility model embodiment because of being equipped with two piezoelectric elements, can work in multiple emission receiving mode when detecting the barrier, such as one emission one reception, one emission multiple reception and multiple emission multiple reception, with more echo information, the ability of ultrasonic sensor detecting barrier and distinguishing barrier is promoted;

[0010] 2、 the cross section figure of each sub -cavity of the double -source ultrasonic sensor probe core of the utility model embodiment is formed by six circular arcs, two sub -cavities are blocked between the partition, the top surface of partition is lower than the mouth portion of the cavity of shell, and the double -source ultrasonic sensor probe core obtains good decoupling effect;

[0011] 3、 the shape of two sub -cavities of the double -source ultrasonic sensor probe core of the utility model embodiment is easy to process and manufacture, and the manufacturing cost is low. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 The utility model discloses a double -source ultrasonic sensor probe core and its double -source ultrasonic sensor.

[0013] Figures 2 to 4 The utility model discloses a double -source ultrasonic sensor probe core and its double -source ultrasonic sensor.

[0014] Figures 5 to 7 The utility model discloses a double -source ultrasonic sensor probe core and its double -source ultrasonic sensor.

[0015] Figure 8 The utility model discloses a double -source ultrasonic sensor probe core and its double -source ultrasonic sensor.

[0016] Figure 9 The utility model discloses a double -source ultrasonic sensor probe core and its double -source ultrasonic sensor.

[0017] Figure 10 The utility model discloses a double -source ultrasonic sensor probe core and its double -source ultrasonic sensor.

[0018] Figure 11 The utility model discloses a double -source ultrasonic sensor probe core and its double -source ultrasonic sensor.

[0019] Figure 12 The utility model discloses a double -source ultrasonic sensor probe core and its double -source ultrasonic sensor. Figure 13Fig. 1 shows a top view of a simulation model of a double-source ultrasonic sensor probe according to an embodiment of the present application. DETAILED DESCRIPTION

[0020] The present application will be described in detail below with reference to the drawings and specific embodiments.

[0021] Figures 2 to 4 Fig. 1 shows a top view of a simulation model of a double-source ultrasonic sensor probe according to an embodiment of the present application. Figures 5 to 7 Fig. 1 shows a top view of a simulation model of a double-source ultrasonic sensor probe according to an embodiment of the present application. Figures 2 to 7 The double-source ultrasonic sensor probe according to an embodiment of the present application comprises a housing 1, two piezoelectric elements 2 and a partition 3.

[0022] The housing 1 has a cavity 10 which is open at the front end face 11 of the housing 1, and the cavity 10 is jointly enclosed by a cavity bottom face 10a and a cavity side face 10b. The cross-sectional profile of the cavity 10 comprises two opposite straight line segments 101, two opposite outer circular arcs 102 and four transition circular arcs 103. Each outer circular arc 102 has a shape of a circular arc which protrudes outwardly from the cavity 10, and the four transition circular arcs 103 are respectively arranged at the corner junctions of the two straight line segments 101 and the two outer circular arcs 102, and the two ends of each transition circular arc 103 are respectively tangentially connected with the adjacent outer circular arc 102 and straight line segment 101. The cross-sectional profile of the cavity 10 has a first symmetry axis X1 and a second symmetry axis X2, the first symmetry axis X1 bisects the two straight line segments 101 (the first symmetry axis X1 passes through the midpoints of the two straight line segments 101), and the second symmetry axis X2 bisects the two outer circular arcs 102 (the second symmetry axis X2 passes through the midpoints of the two outer circular arcs 102).

[0023] The cross-section of the cavity 10 of the housing 1 adopts the above-mentioned shape (approximately rectangular), which can obtain the effect that the horizontal detection angle is different from the vertical detection angle, so as to reduce the false alarm phenomenon caused by the reflection wave signal of the ground detected by the ultrasonic sensor. In addition, the cavity with the approximately rectangular cross-section has a better decoupling effect than the cavity with the circular cross-section, and the cavity with the circular cross-section is prone to transmitting vibration from one side of the sub-cavity to the other side.

[0024] The partition plate 3 is arranged in the cavity 10, the top surface 3b of the partition plate 3 is lower than the opening of the cavity 10 (i.e. lower than the front end surface 11), which can provide an operation space for manual and equipment operation, the bottom of the partition plate 3 is connected with the bottom surface 10a of the cavity, the two ends of the partition plate 3 are respectively connected with the cavity side surface parts where the two straight line segments 101 are located, two sub-cavities 10c which are not communicated with each other are formed in the cavity 10, and the partition plate 3 is symmetrical about the first symmetry axis X1 and the second symmetry axis X2 respectively. The two opposite side surfaces 31 and 32 of the partition plate 3 are concave towards each other. The aforementioned meaning of not communicated with each other means that no notch is arranged on the partition plate 3 to communicate the two sub-cavities 10c.

[0025] In the embodiment, the material of the shell 1 is metal, for example, aluminum. The partition plate 3 is integrally formed with the shell 1.

[0026] The two piezoelectric elements 2 are respectively arranged in the two sub-cavities 10c and fixed on the cavity bottom surface 10a. The fixing mode of the piezoelectric elements 2 on the cavity bottom surface 10a includes but is not limited to adhesion, welding and the like. The piezoelectric elements 2 can be piezoelectric ceramic sheets or the like.

[0027] In the embodiment, each piezoelectric element 2 is a circular piezoelectric element. The diameter of the circular piezoelectric element is 5 mm, and the thickness is 0.2 mm.

[0028] The cross-sectional profile of each sub-cavity 10c is composed of one outer circular arc 102, two transition circular arcs 103 adjacent to the one outer circular arc 102 and a partition plate side surface profile line 34 opposite to the one outer circular arc 102. The partition plate side surface profile line 34 is composed of one intermediate circular arc 342 and two end circular arcs 343, the two ends of the intermediate circular arc 342 are respectively tangent to one end of the two end circular arcs 343, the other end of the two end circular arcs 343 are respectively connected with the two transition circular arcs 103, and the two end circular arcs 343 are respectively symmetrical about the connecting line P1P2 with respect to the two transition circular arcs 103. Wherein, P1 is the intersection of one of the straight line segments 101, one of the transition circular arcs 103 and one of the end circular arcs 343, and P2 is the intersection of the other straight line segment 101, the other transition circular arc 103 and the other end circular arc 343.

[0029] Please refer to Figure 8 , the transition circular arc 103 and the end circular arc 343 are both located on the circumference of a circle C3. The circle C3 is tangent to the straight line segment 101 at the point P1. The circle C3 is inscribed in a circle C4 where the intermediate circular arc 342 is located at the point P3, and is inscribed in a circle C2 where the outer circular arc 102 is located at the point P4. The point P3 is the intersection of the intermediate circular arc 342 and the end circular arc 343, and the point P4 is the intersection of the outer circular arc 102 and the transition circular arc 103.

[0030] Please refer to Figure 9 and Figure 10In the embodiment, the center distance d5 of the intermediate circular arc of the two sub-cavities is 15.98mm-16.02mm, and the center distance d6 of the outer circular arc of the two sub-cavities is 2.63mm-2.67mm. The diameter of the circle C4 where the intermediate circular arc is located is 14.22mm-14.26mm, the diameter of the circle C2 where the outer circular arc is located is 11.08mm-11.12mm, and the diameter of the circle C3 (which can also be referred to as the circle C3 where the end circular arc is located) where the transition circular arc is located is 3.98mm-4.02mm. O1 is the center of the circle C4 where the intermediate circular arc 342 of one of the sub-cavities is located, and O2 is the center of the circle C4 where the intermediate circular arc 342 of the other sub-cavity is located. O3 is the center of the circle C2 where the outer circular arc 102 of one of the sub-cavities is located, and O4 is the center of the circle C2 where the outer circular arc 102 of the other sub-cavity is located.

[0031] The distance d1 between the outer circular arc 102 of each sub-cavity and the piezoelectric element 2 in the sub-cavity is 0.4mm-0.7mm, and the distance d2 between the intermediate circular arc 342 of each sub-cavity and the piezoelectric element 2 in the sub-cavity is 0.4mm-0.6mm, so as to ensure sufficient operation space for automatic or manual piezoelectric element fitting.

[0032] In the embodiment, the distance d3 between the top surface 3b of the partition plate 3 and the mouth of the cavity 10 is 3mm-6mm, so that the partition plate 3 can effectively block the ultrasonic waves emitted by the single-sided piezoelectric element, and the double-source sensor probe can obtain a better decoupling effect. Preferably, the distance d3 between the top surface 3b of the partition plate 3 and the mouth of the cavity 10 is 4mm-5mm.

[0033] In the embodiment, the shell 1 includes a circular bottom plate 1c and a circular ring-shaped peripheral wall portion 1d, the bottom end of the peripheral wall portion 1d is connected with the peripheral edge of the bottom plate 1c, and the two together constitute a cylindrical shell body and define the aforementioned cavity 10. The outer diameter D1 of the bottom plate 1c is 15.4mm-15.5mm. The height H of the shell 1 is 9.55mm-9.6mm. The thickness t1 of the bottom plate 1c is 0.48mm-0.52mm.

[0034] The working process and working principle of the double-source ultrasonic sensor of the double-source ultrasonic sensor probe of the embodiment of the utility model are roughly as follows.

[0035] The PCBA circuit board drives the probe core to emit ultrasonic waves. When the ultrasonic waves in the air contact an obstacle, a reflected signal is formed. The reflected signal is transmitted through the air and contacts the metal bottom plate of the shell, which is transmitted to the two piezoelectric elements through the metal bottom plate. The piezoelectric elements generate an electrical signal that is transmitted back to the PCBA circuit board, and the signal is transmitted to the industrial computer through the PCBA circuit board. According to the needs, the dual-source ultrasonic sensor can adopt one of the following transmission and reception modes: one transmission and one reception mode, that is, one piezoelectric element transmits and receives; one transmission and multiple receptions mode, that is, one piezoelectric element transmits and two piezoelectric elements receive; multiple transmissions and multiple receptions mode, that is, two piezoelectric elements transmit and receive at the same time, or two piezoelectric elements transmit and one piezoelectric element receive at the same time.

[0036] In the multiple transmission and multiple reception mode, the two piezoelectric elements 2 are arranged up and down. According to the time difference of receiving two ultrasonic echo signals, the industrial computer can calculate the distance and height of the obstacle by using the triangular positioning method, so as to obtain more obstacle information. Please refer to Figure 11 for the working principle. The obstacle S receives the ultrasonic signal and forms a reflected echo signal. The upper piezoelectric element 2 and the lower piezoelectric element 2 receive the ultrasonic echo signal at different times. Figure 11 As can be seen from Figure 11 , the propagation distance SP2 of the ultrasonic signal emitted by the lower piezoelectric element 2 is much longer than the propagation distance SP1 of the ultrasonic signal emitted by the upper piezoelectric element 2. The industrial computer analyzes the two groups of ultrasonic echo signals, and can infer the distance, size and height of the obstacle.

[0037] Table 1 shows the simulation of the ultrasonic sensor using ultrasonic sensor simulation software with Figure 12 and Figure 13The simulation results of the simulation model of the two kidney-shaped sub-cavity double-source ultrasonic sensor probe core shown, wherein the diameter D1 of the bottom plate of the double-source ultrasonic sensor as the simulation model is 15.5 mm, the thickness t1 of the bottom plate is 0.5 mm, and the shell height H of the double-source ultrasonic sensor probe core is 9.6 mm. The two piezoelectric elements 2 are circular piezoelectric elements, the diameter of the circular piezoelectric element is 5 mm, and the thickness is 0.2 mm. The cavity shape is NA, which indicates that the shell is not provided with a cavity, and only two sub-cavities are provided; the diameter of the circle on which the outer arcs of the two sub-cavities are located is 14 mm. The partition plate depth refers to the distance d3 between the top surface of the partition plate and the mouth of the cavity, and if the top surface of the partition plate is flush with the mouth of the cavity of the shell (i.e. the front end surface of the shell), it is indicated by NA. The displacement refers to the vibration displacement of the ultrasonic sensor at a certain frequency in the simulation, and the size of the displacement is proportional to the sound pressure of the ultrasonic wave generated by the ultrasonic sensor. Displacement 1 and displacement 2 are the displacements of one piezoelectric element and the other piezoelectric element respectively, wherein one piezoelectric element is in a transmitting state and has a displacement 1, and the other piezoelectric element is not working and has a displacement 2. The decoupling ratio is the ratio of the larger displacement to the smaller displacement.

[0038] Table 1

[0039]

[0040] The shapes of the double-source ultrasonic sensor probe core simulation models numbered V2-1 and V2-2 are derived from the paper in the Journal of the Acoustical Society of America, June 2008 in the background art section, and the shapes of the two sub-cavities are kidney-shaped, the difference is that V2-1 is not provided with a cavity but directly provided with two sub-cavities 11e, and the top surface of the partition plate 3e is flush with the front end surface of the shell, and V2-2 is provided with a cylindrical cavity 100f, and the two sub-cavities 11f are formed in the cavity 100f, and the top surface of the partition plate 3f is lower than the mouth of the cavity 100f. Figure 12 The outer arcs 111e of the two sub-cavities 11e of V2-1 are shown, and the two outer arcs 111e are located on the same circle with a diameter of 14 mm; Figure 13 The outer arcs 111f of the two sub-cavities 11f of V2-2 are shown, and the two outer arcs 111f are also located on the same circle with a diameter of 14 mm, and the two outer arcs 111f are concentric with the cavity 100f and have the same circumference. As can be seen from Table 1, the decoupling ratio of the double-source ultrasonic sensor probe core simulation model numbered V2-1 is the highest, but it is only 4.25.

[0041] Table 2 shows the simulation results of the dual-source ultrasonic sensor probe models numbered V4-1 to V4-4 using ultrasonic sensor simulation software. The simulation models of the dual-source ultrasonic sensor probes numbered V4-1 to V4-4 are similar to the dual-source ultrasonic sensor probes described in the aforementioned embodiment of this utility model (please refer to the specific shape for details). Figures 2 to 4 The two sub-cavities are identical in shape, both being rice grain-shaped (i.e.,...). Figure 2 and Figure 4 The sub-cavities shown in the diagram differ in shape only in the depth of the partition (i.e., the distance d3 between the top surface of the partition and the opening of the cavity). The base plate of the dual-source ultrasonic sensor probe, used in the simulation model, has a diameter D1 of 15.5 mm, a thickness t1 of 0.5 mm, and a shell height H of 9.6 mm. The center-to-center distance d5 between the two sub-cavities' central arcs is 16 mm, and the center-to-center distance d6 between the two sub-cavities' outer arcs is 2.65 mm. The diameter of the circle containing the central arc of each sub-cavity is 14.24 mm, the diameter of the circle containing the outer arc is 11.1 mm, and the diameter of the circle containing the transition arc is 4 mm. The two piezoelectric elements 2 are circular piezoelectric elements with a diameter of 5 mm and a thickness of 0.2 mm. The distance d1 between the piezoelectric element and the outer arc of each sub-cavity is 0.5 mm, and the distance d2 between the piezoelectric element and the central arc of each sub-cavity is 0.45 mm.

[0042] Table 2

[0043]

[0044] As shown in Table 2, the simulation model of the dual-source ultrasonic sensor probe core numbered V4-3 has the highest decoupling ratio, reaching 24.

[0045] In some specific applications, the dual-source ultrasonic sensor probe described in the aforementioned embodiment of the present invention serves as the probe for an automotive ultrasonic sensor, used in reversing radar or to detect obstacles around a car.

[0046] The dual-source ultrasonic sensor probe and its dual-source ultrasonic sensor of this embodiment are equipped with two piezoelectric elements, enabling them to operate in multiple transmission and reception modes, such as one-to-one transmission, one-to-many transmission, and multiple-to-many transmission. With the aid of more echo information, the ultrasonic sensor's ability to detect and distinguish obstacles is improved. The cross-sectional shape of each sub-cavity of the dual-source ultrasonic sensor probe is composed of six circular arcs. A partition separates the two sub-cavities, with the top surface of the partition lower than the opening of the cavity in the housing, thus achieving good decoupling of the dual-source ultrasonic sensor probe.

[0047] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application also intends to include these modifications and variations.

Claims

1. A dual-source ultrasonic sensor probe, comprising a housing, a partition and two piezoelectric elements; the housing has a cavity opening at the front end face of the housing, the cavity is surrounded by a cavity bottom face and cavity side faces, the cross-sectional profile of the cavity has a first symmetry axis and a second symmetry axis; the partition is arranged in the cavity, the top face of the partition is lower than the opening of the cavity, the bottom of the partition is connected with the cavity bottom face, the two ends of the partition are connected with the two opposite side faces of the cavity respectively, forming two sub-cavities in the cavity which are not connected with each other; the two piezoelectric elements are arranged in the two sub-cavities respectively and fixed on the cavity bottom face; characterized in that, The cross-sectional profile of the cavity comprises two opposite straight line segments, two opposite outer arcs and four transition arcs, the shape of each outer arc is a convex arc to the outside of the cavity, the four transition arcs are respectively arranged at the corner junctions of the two straight line segments and the two outer arcs, and the two ends of each transition arc are respectively tangent to the adjacent outer arc and straight line segment; the first symmetry axis bisects the two straight line segments, and the second symmetry axis bisects the two outer arcs; The two ends of the partition plate are respectively connected to the cavity side parts where the two straight line segments are located, the two opposite sides of the partition plate are recessed towards each other, and the partition plate is symmetrical about the first symmetry axis and the second symmetry axis; The cross-sectional profile of each sub-cavity is composed of one outer arc, two transition arcs adjacent to the outer arc, and a partition plate side profile line opposite to the outer arc; the partition plate side profile line is composed of a middle arc and two end arcs, the two ends of the middle arc are respectively tangent to one end of the two end arcs, the other end of the two end arcs is respectively connected to the two transition arcs, and the two end arcs are respectively symmetrical about the line P1P2 with the two transition arcs, wherein P1 is the intersection of one straight line segment, one transition arc and one end arc, and P2 is the intersection of the other straight line segment, the other transition arc and the other end arc.

2. The dual source ultrasonic sensor probe core of claim 1, wherein, The distance between the top surface of the partition plate and the mouth part of the cavity is 3mm-6mm.

3. The dual source ultrasonic sensor probe core of claim 2, wherein, The height of the shell is 9.55mm-9.6mm.

4. The dual source ultrasonic sensor probe core of claim 1, wherein, The center distance of the middle arcs of the two sub-cavities is 15.98mm-16.02mm, and the center distance of the outer arcs of the two sub-cavities is 2.63mm-2.67mm.

5. The dual source ultrasonic sensor probe core of claim 4, wherein, The diameter of the circle where the middle arc is located is 14.22mm-14.26mm, the diameter of the circle where the outer arc is located is 11.08mm-11.12mm, and the diameter of the circle where the transition arc is located is 3.98mm-4.02mm.

6. The dual source ultrasonic sensor probe according to any one of claims 1 to 5, characterized in that The shell comprises a circular bottom plate and a circular ring-shaped peripheral wall part, and the bottom end of the peripheral wall part is connected to the peripheral edge of the bottom plate; The outer diameter of the bottom plate is 15.4mm-15.5mm.

7. The dual source ultrasonic sensor probe according to claim 6, characterized in that The thickness of the bottom plate is 0.48mm-0.52mm.

8. The dual source ultrasonic sensor probe core of claim 1, wherein, The piezoelectric element is a circular piezoelectric element.

9. The dual source ultrasonic sensor probe core of claim 8, wherein, The diameter of the circular piezoelectric element is 5mm.

10. The dual source ultrasonic sensor probe core of claim 1, wherein, The material of the shell is metal; The partition plate and the shell are integrally formed.

11. A dual source ultrasonic sensor, characterized by, The dual-source ultrasonic sensor comprises the dual-source ultrasonic sensor probe core according to any one of claims 1-10.

Images