Ultrasonic metering device and ultrasonic gas meter

Abstract

This application provides an ultrasonic metering device and an ultrasonic gas meter, relating to the field of ultrasonic metering technology. The ultrasonic metering device includes a first wall, a second wall, a first transducer, and a second transducer. The first and second transducers are spaced apart on the first wall, symmetrically arranged about a line parallel to the height direction of the ultrasonic metering device. The second wall is positioned opposite to the first wall. The ultrasonic signal generated by one of the first and second transducers passes through the reflecting surfaces of the second, first, and second walls before being received by the other of the first and second transducers. The reflecting surface of one of the first and second walls is spherical, while the reflecting surface of the other is arc-shaped, improving the focusing ability of the ultrasonic signal and enhancing the detection accuracy of the ultrasonic gas meter.

Description

Technical Field

[0001] This application relates to the field of ultrasonic metering technology, and in particular to an ultrasonic metering device and an ultrasonic gas meter. Background Technology

[0002] An ultrasonic gas meter is an instrument that calculates gas flow by measuring the time difference of ultrasonic waves propagating in a gas flow.

[0003] In related technologies, ultrasonic gas meters include a housing and an ultrasonic metering device disposed within the housing. The ultrasonic metering device typically includes an ultrasonic metering unit and two transducers spaced apart on the ultrasonic metering unit. The two transducers are used to measure the amount of gas passing through the ultrasonic metering unit per unit time. Currently, both the upper and lower surfaces of the flow channel in ultrasonic gas meters are provided with elliptical reflective surfaces.

[0004] However, existing ultrasonic gas meters suffer from poor ultrasonic focusing ability, resulting in low detection accuracy. Summary of the Invention

[0005] This application provides an ultrasonic metering device and an ultrasonic gas meter, which enhances the intensity of the ultrasonic signal, improves the detection sensitivity of the ultrasonic signal of the ultrasonic gas meter, and improves the detection accuracy of the ultrasonic gas meter.

[0006] In a first aspect, embodiments of this application provide an ultrasonic measuring device, including a first wall, a second wall, a first transducer, and a second transducer.

[0007] A first transducer and a second transducer are spaced apart on the first wall surface. The first transducer and the second transducer are symmetrically arranged with a line parallel to the height direction of the ultrasonic measuring device as the axis of symmetry.

[0008] The second wall is positioned opposite the first wall.

[0009] The ultrasonic signal generated by one of the first and second transducers is received by the other of the first and second transducers after passing through the reflecting surfaces of the second wall, the first wall, and the second wall.

[0010] Among them, the reflective surface of one of the first wall surface and the second wall surface is a spherical reflective surface, and the reflective surface of the other of the first wall surface and the second wall surface is an arc reflective surface.

[0011] Along the arrangement direction perpendicular to the first transducer to the second transducer, the middle part of the arc-shaped reflective surface is recessed relative to the two ends of the arc-shaped reflective surface, in a direction away from the interior of the ultrasonic measuring device.

[0012] In some embodiments of this application, the first wall surface has a first reflective surface, and a portion of the first wall surface is recessed in a direction away from the second wall surface to form the first reflective surface.

[0013] A portion of the second wall surface is recessed in a direction away from the first wall surface to form a second reflective surface; the second reflective surface includes a first sub-reflective surface and a second sub-reflective surface.

[0014] Along the direction from the first transducer to the second transducer, the first sub-reflective surface has a first end point and a second end point.

[0015] The distance between the center point of the emitting structure surface of the first transducer and the first endpoint is d1, and the radius of the first sub-reflector is r1.

[0016] d1 and r1 satisfy: r1 > d1.

[0017] Along the direction from the first transducer to the second transducer, with the center point of the emission structure surface of the first transducer as the first origin, a first ray and a second ray with an included angle of 2θ are formed. The first ray and the second ray are symmetrical about the center line of the first transducer. The angle between the line connecting the first origin and the first endpoint and the center line of the first transducer is θ1. θ1 and α1 satisfy: θ1≥α1 / 2.

[0018] Along the direction from the first transducer to the second transducer, the second sub-reflector has a third end point and a fourth end point.

[0019] The distance between the center point of the emitting structure surface of the second transducer and the fourth endpoint is d2; the radius of the second sub-reflector is r2.

[0020] d2 and r2 satisfy: r2 > d2.

[0021] Along the direction from the second transducer 400 to the first transducer 300, with the center point of the emission structure surface of the second transducer 400 as the second origin, a fifth ray and a sixth ray with an included angle of 2θ are formed. The fifth ray and the sixth ray are symmetrical about the centerline of the second transducer 400. The angle between the line connecting the second origin and the second endpoint and the centerline of the second transducer is θ2, and θ2 and α2 satisfy: θ2 ≥ α2 / 2.

[0022] In some embodiments of this application, the first wall surface has a spherical reflective surface, and a portion of the first wall surface is recessed in a direction away from the second wall surface to form a spherical reflective surface.

[0023] A portion of the second wall surface is recessed in a direction away from the first wall surface to form an arc-shaped reflective surface; the arc-shaped reflective surface includes a first arc-shaped reflective surface and a second arc-shaped reflective surface; the first arc-shaped reflective surface and the second arc-shaped reflective surface are spaced apart on the second wall surface.

[0024] Along the direction from the first transducer to the second transducer; the ultrasonic signal generated by the first transducer is reflected sequentially by the first arc-shaped reflective surface, the spherical reflective surface, and the second arc-shaped reflective surface before being received by the second transducer.

[0025] In some embodiments of this application, along the direction from the first transducer to the second transducer, with the center point of the emitting structure surface of the first transducer as the first origin, a first ray and a second ray with an included angle of α1 are formed. The first ray and the second ray are symmetrical about the center line of the first transducer. The connection point of the first ray and the second wall is the first base point. The connection point of the second ray and the second wall is the second base point.

[0026] Using a line passing through the first base point and parallel to the height direction of the ultrasonic measuring device as a mirror line, draw a symmetrical ray to form the third ray.

[0027] Using a line passing through the second base point and parallel to the height direction of the ultrasonic measuring device as a mirror line, draw a symmetrical ray to form the fourth ray.

[0028] Along the direction from the second transducer to the first transducer, with the center point of the emission structure surface of the second transducer as the second origin, a fifth ray and a sixth ray with an included angle of α2 are formed. The fifth ray and the sixth ray are symmetrical about the centerline of the second transducer. The connection point of the fifth ray and the second wall is the fifth base point; the connection point of the sixth ray and the second wall is the sixth base point.

[0029] Using a line passing through the fifth base point and parallel to the height direction of the ultrasonic measuring device as a mirror line, draw a symmetrical ray to form the seventh ray.

[0030] Using a line passing through the sixth base point and parallel to the height direction of the ultrasonic measuring device as a mirror line, draw a symmetrical ray to form the eighth ray.

[0031] The connection point of the third ray and the eighth ray forms the first connection point, and the connection point of the fourth ray and the seventh ray forms the second connection point; both the first connection point and the second connection point are located on the first wall surface.

[0032] The third and eighth rays form a first connecting angle; the fourth and seventh rays form a second connecting angle.

[0033] The first connection point is formed by connecting the bisectors of the first and second connecting angles.

[0034] With the first connection point as the center and the distance between the first connection point and the first connection base point or the second connection base point as the radius, a sphere is drawn to form a first sphere; the trajectory of the spherical reflecting surface coincides with the trajectory of the first sphere.

[0035] The vertical distance between the first connecting base point and the first base point forms the height of the ultrasonic metering device; and / or, the vertical distance between the second connecting base point and the second base point forms the height of the ultrasonic metering device.

[0036] In some embodiments of this application, a ninth ray and a tenth ray with an included angle of α1 are formed along the direction perpendicular to the arrangement of the first transducer and the second transducer, with the center point of the emission structure surface of the first transducer as the first origin. The ninth ray and the tenth ray are symmetrically distributed about the vertical line.

[0037] The connection point between the ninth ray and the second wall forms the ninth base point; the connection point between the tenth ray and the second wall forms the tenth base point.

[0038] With the first origin as the center and the distance between the first origin and the ninth or tenth base point as the radius, draw a circle to form the first circle, and form the first preset arc between the ninth and tenth base points.

[0039] Along the direction perpendicular to the arrangement of the first and second transducers, with the center point of the emission structure surface of the second transducer as the second origin, the eleventh and twelfth rays with an included angle of α2 are formed. The eleventh and twelfth rays are symmetrically distributed about the vertical line.

[0040] The point where the eleventh ray connects to the second wall forms the eleventh base point; the point where the twelfth ray connects to the second wall forms the twelfth base point.

[0041] With the second origin as the center, draw a circle with the distance between the second origin and the eleventh or twelfth base point as the radius to form a second circle, and form a second preset arc between the eleventh and twelfth base points.

[0042] The arc length of the second preset arc is equal to the arc length of the first preset arc.

[0043] In some embodiments of this application, the trajectories of the first arc-shaped reflective surface and the first circle on the second wall surface coincide; the trajectories of the second arc-shaped reflective surface and the second circle on the second wall surface coincide.

[0044] Alternatively, the arc length of the first arc-shaped reflective surface is greater than or equal to the arc length of the first preset arc; the arc length of the second arc-shaped reflective surface is greater than or equal to the arc length of the second preset arc.

[0045] And / or, the distance between the ninth and tenth base points is A, and the width of the ultrasonic measuring device is B, where A and B satisfy: 0.5B≤A≤B; the distance between the eleventh and twelfth base points is C, and the width of the ultrasonic measuring device is B, where C and B satisfy: 0.5B≤C≤B.

[0046] In some embodiments of this application, the first wall surface has an arc-shaped reflective surface, and a portion of the first wall surface is recessed in a direction away from the second wall surface to form an arc-shaped reflective surface.

[0047] A portion of the second wall surface is recessed in a direction away from the first wall surface to form a spherical reflective surface; the spherical reflective surface includes a first spherical reflective surface and a second spherical reflective surface; the first spherical reflective surface and the second spherical reflective surface are spaced apart on the second wall surface.

[0048] Along the direction from the first transducer to the second transducer; the ultrasonic signal generated by the first transducer passes sequentially through the first spherical reflective surface, the arc-shaped reflective surface, and the second spherical reflective surface before being received by the second transducer.

[0049] In some embodiments of this application, the distance between the first transducer and the second transducer is a first distance, and the midpoint of the first distance is a first midpoint.

[0050] Along the direction from the first transducer to the second transducer, with the center point of the emission structure surface of the first transducer as the first origin, the thirteenth and fourteenth rays with an included angle of α1 are formed. The thirteenth and fourteenth rays are symmetrical about the center line of the first transducer.

[0051] With the center point of the emission structure surface of the second transducer as the second origin, the fifteenth and sixteenth rays with an included angle of α2 are formed. The fifteenth and sixteenth rays are symmetrical about the center line of the second transducer.

[0052] Using the first midpoint as the third origin, draw parallel lines to the thirteenth, fourteenth, fifteenth, and sixteenth rays respectively, forming the seventeenth, eighteenth, nineteenth, and twentieth rays.

[0053] The thirteenth and twentieth rays intersect at the third connection point, and the fourteenth and nineteenth rays intersect at the fourth connection point; the thirteenth and twentieth rays form the third connection angle, and the fourteenth and nineteenth rays form the fourth connection angle.

[0054] The intersection of the bisectors of the third and fourth connecting angles forms the third connecting point. The third connecting point is the center of the sphere. A second sphere is formed with the distance between the third connecting point and the third or fourth connecting base point as the radius.

[0055] The fifteenth and eighteenth rays intersect at the fifth connecting point, and the sixteenth and seventeenth rays intersect at the sixth connecting point; the fifteenth and eighteenth rays form the fifth connecting angle, and the sixteenth and seventeenth rays form the sixth connecting angle.

[0056] The intersection of the bisectors of the fifth and sixth connecting angles is the third connecting point; with the third connecting point as the center of the sphere and the distance between the third connecting point and the fifth or sixth connecting base point as the radius, a sphere is drawn to form the third sphere.

[0057] The trajectory of the first spherical reflecting surface coincides with the trajectory of the second sphere; the trajectory of the second spherical reflecting surface coincides with the trajectory of the third sphere.

[0058] Along the direction perpendicular to the first transducer to the second transducer, the point with the greatest distance between the spherical reflecting surface and the first wall is taken as the fourth origin. The twenty-first ray and the twenty-second ray are drawn with the fourth origin as the origin. The twenty-first ray and the twenty-second ray are symmetrically distributed about the vertical line, and the angle between the twenty-first ray and the twenty-second ray is α1.

[0059] The twenty-first and twenty-second rays form the twenty-first and twenty-second base points with the first wall surface.

[0060] With the fourth origin as the center and the distance between the fourth origin and the 21st or 22nd base point as the radius, draw a circle to form a third circle, and form a third preset arc between the 21st and 22nd base points.

[0061] In some embodiments of this application, the trajectories of the arc-shaped reflective surface and the third circle coincide on the first wall surface.

[0062] Alternatively, the arc length of the arc-shaped reflective surface is greater than or equal to the arc length of the third preset arc.

[0063] And / or, the distance between the twenty-first base point and the twenty-second base point is D, and the width of the ultrasonic measuring device is B, where D and B satisfy: 0.5B≤D≤B.

[0064] Secondly, embodiments of this application provide an ultrasonic measuring device, including a first wall, a second wall, a first transducer, and a second transducer.

[0065] The first transducer is installed on the first wall surface.

[0066] The second wall is positioned opposite the first wall; a second transducer is mounted on the second wall.

[0067] The ultrasonic signal generated by the first transducer is reflected by the reflective surfaces of the second and first walls and then received by the second transducer.

[0068] The first wall surface has a third spherical reflective surface, and the second wall surface has a third arc-shaped reflective surface.

[0069] Along the direction from the first transducer to the second transducer, with the center point of the emission structure surface of the first transducer as the first origin, a twenty-third ray and a twenty-fourth ray with an included angle of α1 are formed. The twenty-third ray and the twenty-fourth ray are symmetrical about the center line of the first transducer.

[0070] The connection points between the 23rd and 24th rays and the second wall are the 23rd base point and the 24th base point, respectively.

[0071] Using the parallel line passing through the twenty-third base point and perpendicular to the height direction of the ultrasonic measuring device as a mirror line, draw the symmetrical ray of the twenty-third ray to form the twenty-fifth ray.

[0072] Using the parallel line passing through the twenty-fourth base point and perpendicular to the height direction of the ultrasonic measuring device as a mirror line, draw the symmetrical ray of the twenty-fourth ray to form the twenty-sixth ray.

[0073] Along the arrangement direction from the second transducer to the first transducer, with the center point of the emission structure surface of the second transducer as the second origin, the twenty-seventh ray and the twenty-eighth ray with an included angle of α2 are formed. The twenty-seventh ray and the twenty-eighth ray are symmetrical about the center line of the second transducer.

[0074] The 25th and 28th rays intersect at the 7th junction point, and the 26th and 27th rays intersect at the 8th junction point.

[0075] Both the seventh and eighth connection base points are located on the first wall surface.

[0076] The seventh connecting angle is formed between the 25th and 28th rays; the eighth connecting angle is formed between the 26th and 27th rays.

[0077] The point where the bisectors of the seventh and eighth connecting angles meet forms the fourth connecting point.

[0078] With the fourth connection point as the center and the distance between the fourth connection point and the seventh or eighth connection point as the radius, a fourth sphere is formed; the trajectory of the third spherical reflecting surface coincides with the trajectory of the fourth sphere.

[0079] Along the width of the ultrasonic measuring device, the 29th and 30th rays are formed with an angle of α1, starting from the first origin. The 29th and 30th rays are symmetrically distributed about the vertical line.

[0080] The 29th and 30th rays form the 29th and 30th base points with the second wall surface. A circle is drawn with the first origin as the center and the distance between the first origin and the 29th or 30th base point as the radius to form a fourth circle. A fourth pre-set arc is formed between the 29th and 30th base points.

[0081] In some embodiments of this application, the trajectories of the third arc-shaped reflective surface and the fourth circle coincide on the second wall surface.

[0082] Alternatively, the arc length of the third arc-shaped reflective surface is greater than or equal to the arc length of the fourth preset arc.

[0083] And / or, the distance between the 29th and 30th base points is E, and the width of the ultrasonic measuring device is B, where E and B satisfy: 0.5B≤E≤B.

[0084] Thirdly, embodiments of this application provide an ultrasonic gas meter, including an ultrasonic metering device.

[0085] The ultrasonic metering device and ultrasonic gas meter provided in this application include a first wall, a second wall, a first transducer, and a second transducer. The first and second transducers are spaced apart on the first wall and are symmetrically arranged about a line parallel to the height direction of the ultrasonic metering device. The second wall is positioned opposite to the first wall. The ultrasonic signal generated by one of the first and second transducers passes through the reflecting surfaces of the second, first, and second walls before being received by the other of the first and second transducers. The reflecting surface of one of the first and second walls is spherical, while the reflecting surface of the other is arc-shaped.

[0086] The ultrasonic metering device and ultrasonic gas meter provided in this application embodiment, by setting the reflecting surfaces of the first and second walls used to reflect ultrasonic signals as spherical and arc-shaped reflecting surfaces, respectively, enable the spherical and arc-shaped reflecting surfaces to focus the ultrasonic signals onto a designated area. The focusing ability of the spherical and arc-shaped reflecting surfaces reduces the scattering of ultrasonic signals on the planar reflecting surface, enhances the intensity of the ultrasonic signals, and improves the detection sensitivity and accuracy of the ultrasonic gas meter. Along the width direction of the ultrasonic metering device, the middle of the arc-shaped reflecting surface is concave relative to both ends; this design allows the ultrasonic signals to be effectively converged in the width direction of the ultrasonic metering device. The spherical reflecting surface, with its three-dimensional curvature, can effectively converge ultrasonic signals in both the length and width directions of the ultrasonic metering device. Therefore, the spherical reflecting surface can converge ultrasonic signals in both the length and width directions of the ultrasonic metering device, improving the converging capability of the ultrasonic metering device, enhancing the detection sensitivity and accuracy of the ultrasonic gas meter. Attached Figure Description

[0087] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0088] Figure 1 A schematic diagram of the transducer structure in related technologies. Figure 1 ;

[0089] Figure 2 A schematic diagram of the transducer structure in related technologies. Figure 2 ;

[0090] Figure 3 A schematic diagram of the structure of an ultrasonic measuring device in related technologies. Figure 1 ;

[0091] Figure 4 A schematic diagram of the structure of an ultrasonic measuring device in related technologies. Figure 2 ;

[0092] Figure 5 A schematic diagram of the structure of an ultrasonic measuring device in related technologies. Figure 3 ;

[0093] Figure 6 A first-view structural schematic diagram of the ultrasonic measuring device provided in this application.

[0094] Figure 7 A schematic diagram of the structure of the ultrasonic metering device provided in the embodiments of this application from a second perspective;

[0095] Figure 8 This is a first-view structural schematic diagram of the ultrasonic metering device provided in the embodiments of this application.

[0096] Figure 9 This is a second-view structural schematic diagram of the ultrasonic metering device provided in the embodiments of this application.

[0097] Figure 10 A first-view structural schematic diagram of the ultrasonic metering device provided in Embodiment 3 of this application;

[0098] Figure 11 This is a second-view structural schematic diagram of the ultrasonic metering device provided in Embodiment 3 of this application.

[0099] Explanation of reference numerals in the attached figures:

[0100] 10: Transducer; 20: Wall surface;

[0101] 100: First wall surface;

[0102] 200: Second wall surface;

[0103] 300: First transducer;

[0104] 400: Second transducer;

[0105] 500: Spherical reflective surface; 510: First spherical reflective surface; 520: Second spherical reflective surface; 530: Third spherical reflective surface;

[0106] 600: Curved reflective surface; 610: First curved reflective surface; 630: Third curved reflective surface;

[0107] 700: Side wall.

[0108] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0109] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0110] Reference Figure 1 and Figure 2 As shown, the flow channel of an ultrasonic gas meter refers to the channel or path through which gas flows within the meter. In existing ultrasonic gas meters, the reflecting surface used to reflect ultrasonic signals is a plane. Based on the characteristics of the transducer, the trajectory of the ultrasonic wave emitted by the transducer is a conical ray with an included angle α.

[0111] Reference Figures 3 to 5 As shown, Figure 3 This is a front view of the flow channel of an ultrasonic gas meter. Figure 3 After the ultrasonic signal emitted by the transducer is reflected by the bottom wall surface 20, the ultrasonic signal diverges. Thus, the ultrasonic signal that can be effectively received by the transducer on the other side is only in the area indicated by the dotted line. Ultrasonic signals outside this area are blocked, so the transducer on the other side cannot receive this part of the signal.

[0112] Reference Figure 5 As shown, Figure 5 This is a side view of the flow path of an ultrasonic gas meter. (Refer to...) Figure 5It can be concluded that after the ultrasonic signal is reflected by the bottom plane, the signal is reflected onto the sidewall of the flow channel. The ultrasonic signal is then reflected again by the sidewall plane before it can be received by the transducer on the other side. The ultrasonic signal intensity is inversely proportional to the number of reflections.

[0113] Researchers have discovered that, currently, elliptical reflective surfaces can be incorporated into the flow channel of ultrasonic gas meters, for example, on both the upper and lower surfaces of the flow channel, to mitigate the intensity attenuation during ultrasonic wave propagation. Along the flow channel's extension direction, the elliptical reflective surface reflects the ultrasonic signal, acting as a converging element. However, in the width direction of the flow channel—perpendicular to its extension—the elliptical reflective surface cannot effectively converge ultrasonic waves from both sides of the channel width. Therefore, existing ultrasonic gas meters suffer from poor ultrasonic wave converging ability, resulting in low detection accuracy.

[0114] Therefore, this application provides an ultrasonic metering device and an ultrasonic gas meter. The ultrasonic metering device includes a first wall, a second wall, a first transducer, and a second transducer. The first transducer and the second transducer are spaced apart on the first wall, and are symmetrically arranged about a line parallel to the height direction of the ultrasonic metering device as an axis of symmetry. The second wall is positioned opposite to the first wall. The ultrasonic signal generated by one of the first and second transducers passes through the reflecting surfaces of the second wall, the first wall, and the second wall, and is received by the other of the first and second transducers. The reflecting surface of one of the first and second wall is a spherical reflecting surface, and the reflecting surface of the other of the first and second wall is an arc-shaped reflecting surface.

[0115] Along the arrangement direction perpendicular to the first transducer to the second transducer, the middle part of the arc-shaped reflective surface is recessed relative to the two ends of the arc-shaped reflective surface, in a direction away from the interior of the ultrasonic measuring device.

[0116] The ultrasonic metering device and ultrasonic gas meter provided in this application embodiment, by setting the reflecting surfaces of the first and second walls used to reflect ultrasonic signals as spherical and arc-shaped reflecting surfaces, respectively, enable the spherical reflecting surface to focus the ultrasonic signal onto a designated area, and the arc-shaped reflecting surface to focus the ultrasonic signal onto a designated area. The focusing ability of the spherical and arc-shaped reflecting surfaces reduces the scattering of ultrasonic signals on the planar reflecting surface, thereby enhancing the intensity of the ultrasonic signal.

[0117] Along the width of the ultrasonic metering device, the arc-shaped reflective surface is concave at the middle and opposite ends. This design allows the ultrasonic signal to be effectively focused along the width of the ultrasonic metering device. The spherical reflective surface, with its three-dimensional curvature, can effectively focus the ultrasonic signal in both the length and width directions of the ultrasonic metering device. Therefore, the spherical reflective surface can focus the ultrasonic signal in both the length and width directions of the ultrasonic metering device, improving the focusing capability of the ultrasonic metering device, enhancing the detection sensitivity of the ultrasonic gas meter, and improving the detection accuracy of the ultrasonic gas meter.

[0118] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0119] Firstly, referring to Figure 6 As shown in the figure, this application provides an ultrasonic measuring device, which includes a first wall surface 100, a second wall surface 200, a first transducer 300, and a second transducer 400.

[0120] A first transducer 300 and a second transducer 400 are spaced apart on the first wall surface 100. The first transducer 300 and the second transducer 400 are symmetrically arranged with the parallel line of the height direction of the ultrasonic meter as the axis of symmetry.

[0121] The second wall surface 200 is disposed opposite to the first wall surface 100.

[0122] The ultrasonic signal generated by one of the first transducers 300 and the second transducer 400 is received by the other of the first transducers 300 and the second transducer 400 after passing through the reflecting surfaces of the second wall 200, the first wall 100, and the second wall 200.

[0123] Among them, the reflective surface of one of the first wall surface 100 and the second wall surface 200 is a spherical reflective surface 500, and the reflective surface of the other of the first wall surface 100 and the second wall surface 200 is an arc-shaped reflective surface 600.

[0124] Along the arrangement direction perpendicular to the first transducer 300 to the second transducer 400, the middle part of the arc-shaped reflective surface 600 is recessed relative to the two ends of the arc-shaped reflective surface 600 in the direction away from the interior of the ultrasonic measuring device.

[0125] For example, referring to Figure 6, the flow channel of the ultrasonic metering device is a straight flow channel. The flow channel includes a first wall 100, a second wall 200, and a side wall 700. The first wall 100 and the second wall 200 are disposed opposite to each other, and the side wall 700 is used to connect the first wall 100 and the second wall 200 so that the flow channel forms a closed area.

[0126] For example, the ultrasonic signal is received after passing through multiple reflecting surfaces: the second wall 200, the first wall 100, and then the second wall 200. This results in a W-shaped propagation path for the ultrasonic signal within the flow channel, allowing the signal to travel a longer distance in the fluid. This extended path improves measurement resolution and accuracy. Furthermore, because the W-shaped path involves multiple reflections and a longer propagation path, it can average out and reduce the impact of instantaneous changes caused by fluid turbulence or other disturbances on the measurement results.

[0127] For example, due to the symmetry of the spherical reflective surface 500, it can uniformly reflect ultrasonic signals from different directions. This reduces the scattering and distortion of the ultrasonic signal, ensuring that the ultrasonic signal propagates along a consistent path after reflection. The spherical reflective surface 500 can focus the incident ultrasonic signal into a single area. This focusing ability reduces the scattering of the ultrasonic signal on the planar reflective surface, helping to enhance the intensity of the ultrasonic signal and improve the detection sensitivity of the ultrasonic signal.

[0128] The curved reflective surface 600 can focus the ultrasonic signal into a certain area, reduce the scattering of the ultrasonic signal on the planar reflective surface, help improve the intensity and clarity of the ultrasonic signal, and thus improve the measurement accuracy of the ultrasonic metering device.

[0129] The ultrasonic metering device provided in this application configures the reflecting surfaces of the first wall 100 and the second wall 200 for reflecting ultrasonic signals as a spherical reflecting surface 500 and an arc-shaped reflecting surface 600, respectively. The spherical reflecting surface 500 and the arc-shaped reflecting surface 600 can focus the ultrasonic signal onto a designated area. The focusing ability of the spherical reflecting surface 500 and the arc-shaped reflecting surface 600 reduces the scattering of the ultrasonic signal on the planar reflecting surface, enhances the intensity of the ultrasonic signal, improves the detection sensitivity of the ultrasonic gas meter, and increases the detection accuracy of the ultrasonic gas meter.

[0130] Meanwhile, the curved reflector 600 can be designed with different curvatures according to specific application requirements to adapt to different ultrasonic signal frequencies and propagation conditions. The curved reflector 600 is a two-dimensional curved surface with curvature in one direction. The curved reflector 600 has a relatively simple structure and can be produced through processes such as extrusion, bending, or die forming. During the fabrication of the curved reflector, it is not necessary to ensure that its curvature is consistent in all directions, nor is it necessary to use complex molds and processing equipment.

[0131] In the process of preparing the flow channel, the material utilization rate of the arc-shaped reflective surface is relatively high because its shape can be achieved through simple cutting and forming processes, reducing material waste. Due to the simple geometry and manufacturing process of the arc-shaped reflective surface, the production cost and time are usually low. Therefore, the arc-shaped reflective surface 600 is usually easy to manufacture and integrate into the wall of the flow channel, which can reduce the production cost and complexity of the ultrasonic metering device.

[0132] For example, the arrangement direction of the first transducer 300 to the second transducer 400 is the length direction of the ultrasonic metering device. The arrangement direction perpendicular to the first transducer 300 to the second transducer 400 is the width direction of the ultrasonic metering device.

[0133] Along the width of the ultrasonic metering device, the arc-shaped reflective surface is concave at the middle and opposite ends. This design allows the ultrasonic signal to be effectively focused along the width of the ultrasonic metering device. The spherical reflective surface, with its three-dimensional curvature, can effectively focus the ultrasonic signal in both the length and width directions of the ultrasonic metering device. Therefore, the spherical reflective surface can focus the ultrasonic signal in both the length and width directions of the ultrasonic metering device, improving the focusing capability of the ultrasonic metering device, enhancing the detection sensitivity of the ultrasonic gas meter, and improving the detection accuracy of the ultrasonic gas meter.

[0134] As one possible implementation, the first wall surface 100 has a first reflective surface, and a portion of the first wall surface 100 is recessed in a direction away from the second wall surface 200 to form the first reflective surface.

[0135] A portion of the second wall surface 200 is recessed in a direction away from the first wall surface 100 to form a second reflective surface; the second reflective surface includes a first sub-reflective surface and a second sub-reflective surface.

[0136] Along the direction from the first transducer 300 to the second transducer 400, the first sub-reflective surface has a first end point Z1 and a second end point Z2.

[0137] The distance between the center point of the emitting structure surface of the first transducer 300 and the first endpoint is d1, and the radius of the first sub-reflecting surface is r1.

[0138] d1 and r1 satisfy: r1 > d1.

[0139] The length of d1 is referenced Figure 8 As shown in O1Z1, the length of r1 is... Figure 8 The length of E2B3.

[0140] Setting r1 and d1 to satisfy r1 > d1 helps ensure that the ultrasonic signal is effectively reflected and focused on the first sub-reflecting surface.

[0141] Along the direction from the first transducer 300 to the second transducer 400, with the center point of the emission structure surface of the first transducer 300 as the first origin, a first ray and a second ray with an included angle of α1 are formed. The first ray and the second ray are symmetrical about the center line of the first transducer 300. The angle between the line connecting the first origin and the first endpoint and the center line of the first transducer is θ1. θ1 and α1 satisfy: θ1≥α1 / 2.

[0142] In the first transducer 300, the preset pointing angle of the first transducer 300 is α1, where α1 is the maximum angle of the ultrasonic signal that the first transducer 300 can emit. The angle α1 is inherently determined by the design and manufacturing parameters of the first transducer 300. Specifically, the size of α1 depends on the factory settings of the first transducer 300, including its internal structure, material properties, and design specifications.

[0143] By setting α1 and θ1 to satisfy θ1≥α1 / 2, the ultrasonic signals emitted by the first transducer 300 can all be reflected by the first sub-reflecting surface. In this way, the focusing ability of the ultrasonic metering device is improved along the width direction of the ultrasonic metering device.

[0144] Along the direction from the first transducer 300 to the second transducer 400, the second sub-reflecting surface has a third endpoint Z3 and a fourth endpoint Z4.

[0145] The distance between the center point of the emitting structure surface of the second transducer 400 and the fourth endpoint is d2; the radius of the second sub-reflector is r2.

[0146] Wherein, the length of d2 is referenced Figure 8 As shown in O2Z4, the length of r2 is the same as the length of E3B5.

[0147] d2 and r2 satisfy the condition that r2 > d2. This helps ensure that the ultrasonic signal is effectively reflected and focused on the second sub-reflector surface.

[0148] Along the direction from the second transducer 400 to the first transducer 300, with the center point of the emission structure surface of the second transducer 400 as the second origin, a fifth ray and a sixth ray with an included angle of α2 are formed. The fifth ray and the sixth ray are symmetrical about the center line of the second transducer 400. The angle between the line connecting the second origin and the second endpoint and the center line of the second transducer is θ2. θ2 and α2 satisfy: θ2≥α2 / 2.

[0149] In the second transducer 400, α2 is the maximum angle of the ultrasonic signal that the second transducer 400 can emit. The angle α2 is inherently determined by the design and manufacturing parameters of the second transducer 400. Specifically, the size of α2 depends on the factory settings of the second transducer 400, including its internal structure, material properties, and design specifications.

[0150] By setting α2 and θ2 to satisfy θ2≥α2 / 2, the region formed between the fifth and sixth rays includes the ultrasonic signals emitted by the second transducer 400. The ultrasonic signals emitted by the second transducer 400 can all be reflected by the second sub-reflecting surface. In this way, the focusing capability of the ultrasonic metering device is improved along the width direction of the ultrasonic metering device.

[0151] The preset pointing angle of the first transducer 300 is α1, and the preset pointing angle of the second transducer 400 is α2. α1 = α2. For ease of illustration in the accompanying drawings, α is used to refer to α1 and α2.

[0152] As one feasible implementation method, refer to Figure 6 As shown, the first wall surface 100 has a spherical reflective surface 500, and a portion of the first wall surface 100 is recessed in a direction away from the second wall surface 200 to form the spherical reflective surface 500.

[0153] A portion of the second wall surface 200 is recessed in a direction away from the first wall surface 100 to form an arc-shaped reflective surface 600; the arc-shaped reflective surface 600 includes a first arc-shaped reflective surface 610 and a second arc-shaped reflective surface; the first arc-shaped reflective surface 610 and the second arc-shaped reflective surface are spaced apart on the second wall surface 200.

[0154] The first reflecting surface is a spherical reflecting surface 500. The first sub-reflecting surface is a first arc-shaped reflecting surface 610. The second sub-reflecting surface is a second arc-shaped reflecting surface.

[0155] Along the direction from the first transducer 300 to the second transducer 400, the ultrasonic signal generated by the first transducer 300 is reflected sequentially by the first arc-shaped reflective surface 610, the spherical reflective surface 500, and the second arc-shaped reflective surface before being received by the second transducer 400.

[0156] For example, the flow channel of the ultrasonic metering device is a straight flow channel. The flow channel includes a first wall 100, a second wall 200, and a side wall 700. The first wall 100 and the second wall 200 are disposed opposite to each other, and the side wall 700 is used to connect the first wall 100 and the second wall 200 so that the flow channel forms a closed area.

[0157] For example, the first transducer 300 generates an ultrasonic signal that first propagates to a first arcuate reflective surface 610 of the second wall 200. The ultrasonic signal is reflected on the first arcuate reflective surface 610. Due to the design of the first arcuate reflective surface 610, the ultrasonic signal is focused and guided, reducing scattering and enhancing signal strength.

[0158] Subsequently, the ultrasonic signal, after being reflected by the first arc-shaped reflective surface 610, propagates to the spherical reflective surface 500 of the first wall surface 100. The spherical reflective surface 500 further focuses the ultrasonic signal, ensuring the intensity and directionality of the ultrasonic signal. The symmetry of the spherical reflective surface 500 helps reduce ultrasonic signal distortion and ensures that the ultrasonic signal follows a consistent path after reflection.

[0159] The ultrasonic signal reflected from the spherical reflector 500 then propagates to the second arc-shaped reflector of the second wall 200. The second arc-shaped reflector again focuses and guides the ultrasonic signal, ensuring that the ultrasonic signal has sufficient intensity and clarity when it reaches the second transducer 400.

[0160] Finally, the ultrasonic signal, after multiple reflections and focusing, is received by the second transducer 400.

[0161] By setting a spherical reflective surface 500 on the first wall surface 100 and a first arc-shaped reflective surface 610 and a second arc-shaped reflective surface on the second wall surface 200, the combined design of the spherical reflective surface 500 and the arc-shaped reflective surface 600 effectively reduces the scattering and distortion of ultrasonic signals and ensures the consistency of ultrasonic signals during propagation.

[0162] Because ultrasonic signals travel a longer path in fluids and undergo multiple focusing processes, the resolution and accuracy of ultrasonic gas meters are improved, which helps to enhance the detection accuracy of ultrasonic gas meters.

[0163] As one feasible implementation method, refer to Figure 6 and Figure 7 As shown, along the direction from the first transducer 300 to the second transducer 400, with the center point of the emission structure surface of the first transducer 300 as the first origin, a first ray and a second ray are formed. The first ray and the second ray are symmetrical about the center line of the first transducer 300, and the included angle between the first ray and the second ray is α1.

[0164] The connection point between the first ray and the second wall 200 is the first base point; the connection point between the second ray and the second wall 200 is the second base point.

[0165] Using a line passing through the first base point and parallel to the height direction of the ultrasonic measuring device as a mirror line, draw a symmetrical ray to form the third ray.

[0166] Using a line passing through the second base point and parallel to the height direction of the ultrasonic measuring device as a mirror line, draw a symmetrical ray to form the fourth ray.

[0167] Along the direction from the second transducer 400 to the first transducer 300, with the center point of the emission structure surface of the second transducer 400 as the second origin, a fifth ray and a sixth ray are formed. The fifth ray and the sixth ray are symmetrical about the center line of the second transducer 400, and the included angle between the fifth ray and the sixth ray is α2.

[0168] The connection point between the fifth ray and the second wall 200 is the fifth base point; the connection point between the sixth ray and the second wall 200 is the sixth base point.

[0169] Using a line passing through the fifth base point and parallel to the height direction of the ultrasonic measuring device as a mirror line, draw a symmetrical ray to form the seventh ray.

[0170] Using a line passing through the sixth base point and parallel to the height direction of the ultrasonic measuring device as a mirror line, draw a symmetrical ray to form the eighth ray.

[0171] The connection point of the third ray and the eighth ray forms the first connection base point, and the connection point of the fourth ray and the seventh ray forms the second connection base point; both the first connection base point and the second connection base point are located on the first wall surface 100.

[0172] The third and eighth rays form a first connecting angle; the fourth and seventh rays form a second connecting angle.

[0173] The first connection point is formed by connecting the bisectors of the first and second connecting angles.

[0174] With the first connection point as the center and the distance between the first connection point and the first connection base point or the second connection base point as the radius, a sphere is drawn to form a first sphere; the trajectory of the spherical reflective surface 500 coincides with the trajectory of the first sphere.

[0175] For example, the center point of the emitting structure surface of the first transducer 300 is the first origin O1.

[0176] The emitting structure surface of the first transducer 300 has a regular geometric shape, such as a circle or a rectangle, and the center point of the emitting structure surface of the first transducer 300 is the geometric center of the geometric shape.

[0177] The centerline of the first transducer 300 refers to an imaginary straight line that is perpendicular to the emitting structure surface of the first transducer 300 and passes through its center point.

[0178] The ultrasonic signal emitted from the first transducer 300 forms a first ray and a second ray. These two rays are symmetrical about the center line of the first transducer 300 and are respectively connected to the first base point A1 and the second base point A2 on the second wall 200.

[0179] By drawing mirror lines at the first base point A1 and the second base point A2, a third ray, a fourth ray, and a symmetrical ray of the first ray are formed.

[0180] Similarly, the center point of the emitting structure surface of the second transducer 400 is the second origin O2.

[0181] The emitting structure surface of the second transducer 400 has a regular geometric shape, such as a circle or a rectangle, and the center point of the emitting structure surface of the second transducer 400 is the geometric center of the geometric shape.

[0182] The centerline of the second transducer 400 refers to an imaginary straight line that is perpendicular to the emitting structure surface of the second transducer 400 and passes through its center point.

[0183] The signal emitted from the second transducer 400 forms a fifth and a sixth ray, which are connected to the fifth and sixth base points respectively on the second wall 200. A seventh ray, a symmetrical ray of the fifth ray, and an eighth ray, a symmetrical ray of the sixth ray, are formed through mirror lines.

[0184] The connection point of the third ray and the eighth ray forms the first connection point A3, and the connection point of the fourth ray and the seventh ray forms the second connection point A4; both the first connection point A3 and the second connection point A4 are located on the first wall surface 100.

[0185] With the first connection point E1 as the center, the distance between the first connection point E1 and either the first connection base point A3 or the second connection base point A4 is selected as the radius to form a first sphere. The surface trajectory of the first sphere coincides with the trajectory of the designed spherical reflective surface 500, ensuring that the shape of the spherical reflective surface 500 can effectively focus and guide the ultrasonic signal.

[0186] The vertical distance between the first connecting base point and the second base point forms the height of the ultrasonic metering device; the vertical distance between the second connecting base point and the second base point forms the height of the ultrasonic metering device.

[0187] For example, since the α angle of the first transducer 300 and the second transducer 400 is fixed, α is also determined once the types of the first transducer 300 and the second transducer 400 are determined. Therefore, in order to design a reasonable flow channel, it is necessary to adjust the distance between the first transducer 300 and the second transducer 400, and the distance between the first wall 100 and the second wall 200, so that the ultrasonic signal emitted by one of the first transducer 300 and the second transducer 400 can be received by the other of the first transducer 300 and the second transducer 400.

[0188] For ease of description, the distance between the first transducer 300 and the second transducer 400 is set to a preset value. Then, the height of the flow channel is determined according to the path of the ultrasonic signals emitted by the first transducer 300 and the second transducer 400.

[0189] The distance between the first wall 100 and the second wall 200 can be determined by connecting the mirror lines of the first and sixth rays (the third and eighth rays) and the second and fifth rays (the fourth and seventh rays). Accurately determining this distance helps optimize the propagation path of the ultrasonic signal, thereby improving measurement accuracy. Furthermore, this design allows for flexible adjustment of the distance between the first and second walls 100 under different operating conditions without requiring redesign or remanufacturing of the first and second transducers 300 and 400. This flexibility enables the first and second transducers 300 to adapt to different application scenarios and environmental conditions.

[0190] As one feasible implementation method, refer to Figure 8 As shown, the angle between the centerline of the first transducer 300 and the direction from the first transducer 300 to the second transducer 400 is γ1, and γ1 satisfies: 30°≤γ1≤80°; the angle between the centerline of the second transducer 400 and the direction from the second transducer 400 to the first transducer 300 is γ2, and γ2 satisfies: 30°≤γ2≤80°.

[0191] α1 satisfies: 5°≤α1≤20°. α2 satisfies: 5°≤α2≤20°.

[0192] For example, when γ1 is in the range of 30°-80°, it ensures effective transmission of the ultrasonic signal between the first transducer 300 and the second transducer 400. When γ2 is in the range of 30°-80°, it ensures effective transmission of the ultrasonic signal between the first transducer 300 and the second transducer 400.

[0193] α1 is the maximum angle of the ultrasonic signal emitted by the first transducer 300. The range of α1 is 5°-20°. This angle is usually determined by the design and manufacturing parameters of the first transducer 300 and affects the divergence or focusing characteristics of the ultrasonic signal.

[0194] α2 is the maximum angle at which the ultrasonic signal emitted by the second transducer 400 can be emitted. The range of α2 is 5°-20°. This angle is usually determined by the design and manufacturing parameters of the second transducer 400 and affects the divergence or focusing characteristics of the ultrasonic signal.

[0195] Reference Figure 7 As shown, along the direction perpendicular to the arrangement of the first transducer 300 and the second transducer 400, with the center point of the emission structure surface of the first transducer 300 as the first origin, the ninth ray and the tenth ray are formed. The ninth ray and the tenth ray are symmetrically distributed about the vertical line, and the included angle between the ninth ray and the tenth ray is α1.

[0196] The connection point of the ninth ray and the second wall 200 forms the ninth base point; the connection point of the tenth ray and the second wall 200 forms the tenth base point.

[0197] With the first origin as the center and the distance between the first origin and the ninth or tenth base point as the radius, draw a circle to form the first circle, and form the first preset arc between the ninth and tenth base points.

[0198] Along the arrangement direction perpendicular to the first transducer 300 and the second transducer 400, with the center point of the emission structure surface of the second transducer 400 as the second origin, the eleventh ray and the twelfth ray are formed. The eleventh ray and the twelfth ray are symmetrically distributed about the vertical line, and the included angle between the eleventh ray and the twelfth ray is α2.

[0199] The connection point of the eleventh ray and the second wall 200 forms the eleventh base point; the connection point of the twelfth ray and the second wall 200 forms the twelfth base point.

[0200] With the second origin as the center, draw a circle with the distance between the second origin and the eleventh or twelfth base point as the radius to form a second circle, and form a second preset arc between the eleventh and twelfth base points.

[0201] For example, a ninth ray and a tenth ray are formed starting from the first origin O1, the center point of the emission structure surface of the first transducer 300. These two rays are symmetrically distributed about a perpendicular line to the arrangement direction of the first transducer 300 and the second transducer 400, and the included angle between them is α1.

[0202] The connection point between the ninth ray and the second wall 200 is the ninth base point A9, and the connection point between the tenth ray and the second wall 200 is the tenth base point A10. The ninth base point A9 and the tenth base point A10 are used to determine the reflection position of the ultrasonic signal on the second wall 200.

[0203] A first circle is formed with the first origin O1 as the center and the distance between the first origin O1 and the ninth base point A9 or the tenth base point A10 as the radius. The arc portion between the ninth base point and the tenth base point forms a first preset arc. The first preset arc and the first circle coincide on the trajectory of the second wall surface 200.

[0204] Originating from the center point O2 of the emitting structure surface of the second transducer 400, an eleventh and twelfth ray are formed. These two rays are symmetrically distributed about a perpendicular line perpendicular to the arrangement direction of the first transducer 300 and the second transducer 400, and the included angle between them is α2. The connection point between the eleventh ray and the second wall surface 200 is the eleventh base point, and the connection point between the twelfth ray and the second wall surface 200 is the twelfth base point. The tenth and eleventh base points are used to determine the reflection position of the ultrasonic signal on the second wall surface 200.

[0205] Using the second origin O2 as the center, the distance between the second origin O2 and either the eleventh or twelfth base point is chosen as the radius to form a second circle. The arc portion between the eleventh and twelfth base points forms a second preset arc. The second preset arc and the second circle coincide on the trajectory of the second wall surface 200.

[0206] For example, the arc length of the first preset arc is equal to the arc length of the second preset arc.

[0207] In one feasible implementation, the first arc-shaped reflective surface 610 and the first circle coincide on the trajectory of the second wall surface 200; the second arc-shaped reflective surface and the second circle coincide on the trajectory of the second wall surface 200.

[0208] For example, by utilizing the motion trajectory of the ultrasonic signals emitted by the first transducer 300 and the second transducer 400, the first arc-shaped reflecting surface 610 and the second arc-shaped reflecting surface are determined. This helps to ensure that the reflection path of the ultrasonic signal in the ultrasonic metering device is precisely controlled, avoids the ultrasonic signal being scattered by the plane of the first wall 100 and the second wall 200, and improves the propagation intensity of the ultrasonic signal, thereby improving the detection accuracy of the ultrasonic gas meter.

[0209] In some embodiments, the arc length of the first arc-shaped reflective surface 610 is greater than or equal to the arc length of the first preset arc; the arc length of the second arc-shaped reflective surface is greater than or equal to the arc length of the second preset arc, which helps to increase the total area of ​​the arc-shaped reflective surface 600 to effectively capture and reflect the incident ultrasonic signal, thereby improving the intensity and quality of the ultrasonic signal.

[0210] In other embodiments, the distance between the ninth and tenth base points is A, and the width of the ultrasonic metering device is B, where A and B satisfy: 0.5B ≤ A ≤ B; the distance between the eleventh and twelfth base points is C, and the width of the ultrasonic metering device is B, where C and B satisfy: 0.5B ≤ C ≤ B. By ensuring that the distance between the ninth base point A9 and the tenth base point A10 is within a reasonable range within the width of the ultrasonic metering device, the influence of the edge effect sidewall 700 on the propagation of ultrasonic signals can be reduced. This design helps to avoid uneven scattering and reflection of ultrasonic signals at the edge of the device.

[0211] By setting A to A≥0.5B and C to C≥0.5B, this means that the curved reflective surface 600 can effectively cover the width of the ultrasonic metering device. This coverage helps ensure uniform propagation of the ultrasonic signal throughout the entire width of the ultrasonic metering device.

[0212] As one possible implementation, the first wall surface 100 has an arcuate reflective surface 600, and a portion of the first wall surface 100 is recessed in a direction away from the second wall surface 200 to form the arcuate reflective surface 600.

[0213] A portion of the second wall surface 200 is recessed in a direction away from the first wall surface 100 to form a spherical reflective surface 500; the spherical reflective surface 500 includes a first spherical reflective surface 510 and a second spherical reflective surface 520; the first spherical reflective surface 510 and the second spherical reflective surface 520 are spaced apart on the second wall surface 200.

[0214] The first reflecting surface is an arc-shaped reflecting surface 600. The first sub-reflecting surface is a first spherical reflecting surface 510. The second sub-reflecting surface is a second spherical reflecting surface 520.

[0215] Along the direction from the first transducer 300 to the second transducer 400, the ultrasonic signal generated by the first transducer 300 passes sequentially through the first spherical reflective surface 510, the arc-shaped reflective surface 600, and the second spherical reflective surface 520 before being received by the second transducer 400.

[0216] For example, the first transducer 300 generates an ultrasonic signal that first propagates to a first spherical reflective surface 510 of the second wall 200. The ultrasonic signal is reflected on the first spherical reflective surface 510. Due to the design of the spherical reflective surface 500, the ultrasonic signal is focused and guided, reducing scattering and enhancing the signal intensity. The symmetry of the first spherical reflective surface 510 helps reduce ultrasonic signal distortion and ensures a consistent path for the reflected ultrasonic signal.

[0217] Subsequently, the ultrasonic signal, after being reflected by the first spherical reflective surface 510, propagates to the arc-shaped reflective surface 600 of the first wall surface 100. The arc-shaped reflective surface 600 further focuses the ultrasonic signal, ensuring the intensity and directionality of the ultrasonic signal.

[0218] The ultrasonic signal reflected from the curved reflective surface 600 then propagates to the second spherical reflective surface 520 of the second wall surface 200. The second spherical reflective surface 520 again focuses and guides the ultrasonic signal, ensuring that the ultrasonic signal has sufficient intensity and clarity when it reaches the second transducer 400.

[0219] Finally, the ultrasonic signal, after multiple reflections and focusing, is received by the second transducer 400.

[0220] By setting an arc-shaped reflective surface 600 on the first wall surface 100 and a first spherical reflective surface 510 and a second spherical reflective surface 520 on the second wall surface 200, the combined design of the spherical reflective surface 500 and the arc-shaped reflective surface 600 effectively reduces the scattering and distortion of ultrasonic signals, ensuring the consistency of ultrasonic signals during propagation. Because the ultrasonic signal travels a longer path in the fluid and undergoes multiple focusing processes, the resolution and accuracy of the ultrasonic gas meter are improved, contributing to enhanced detection accuracy.

[0221] As one feasible implementation method, refer to Figure 8 and Figure 9 As shown, the distance between the first transducer 300 and the second transducer 400 is the first distance, and the midpoint of the first distance is the first midpoint.

[0222] Along the direction from the first transducer 300 to the second transducer 400, with the center point of the emission structure surface of the first transducer 300 as the first origin, the thirteenth ray and the fourteenth ray are formed. The thirteenth ray and the fourteenth ray are symmetrical about the center line of the first transducer 300, and the included angle between the thirteenth ray and the fourteenth ray is α1.

[0223] With the center point of the emission structure surface of the second transducer 400 as the second origin, the fifteenth ray and the sixteenth ray are formed. The fifteenth ray and the sixteenth ray are symmetrical about the center line of the second transducer 400, and the included angle between the fifteenth ray and the sixteenth ray is α2.

[0224] Using the first midpoint as the third origin, draw parallel lines to the thirteenth, fourteenth, fifteenth, and sixteenth rays respectively, forming the seventeenth, eighteenth, nineteenth, and twentieth rays.

[0225] The thirteenth and twentieth rays intersect at the third connection point, and the fourteenth and nineteenth rays intersect at the fourth connection point; the thirteenth and twentieth rays form the third connection angle, and the fourteenth and nineteenth rays form the fourth connection angle.

[0226] The intersection of the bisectors of the third and fourth connecting angles forms the third connecting point. The third connecting point is the center of the sphere. A second sphere is formed with the distance between the third connecting point and the third or fourth connecting base point as the radius.

[0227] The fifteenth and eighteenth rays intersect at the fifth connecting point, and the sixteenth and seventeenth rays intersect at the sixth connecting point; the fifteenth and eighteenth rays form the fifth connecting angle, and the sixteenth and seventeenth rays form the sixth connecting angle.

[0228] The intersection of the bisectors of the fifth and sixth connecting angles is the third connecting point; with the third connecting point as the center of the sphere and the distance between the third connecting point and the fifth or sixth connecting base point as the radius, a sphere is drawn to form the third sphere.

[0229] The trajectory of the first spherical reflective surface 510 coincides with the trajectory of the second sphere; the trajectory of the second spherical reflective surface 520 coincides with the trajectory of the third sphere.

[0230] For example, the midpoint of the first distance is the first midpoint M.

[0231] The thirteenth and twentieth rays intersect at the third connecting point B3.

[0232] The fourteenth and nineteenth rays intersect at the fourth connecting point B4.

[0233] The fifteenth and eighteenth rays intersect at the fifth connecting point B5.

[0234] The sixteenth and seventeenth rays intersect at the sixth connecting point B6.

[0235] The intersection of the bisectors of the third and fourth connecting angles forms the third connecting point E2.

[0236] The intersection of the bisectors of the fifth and sixth connecting angles is the third connecting point E3.

[0237] By utilizing the motion trajectory of the ultrasonic signals emitted by the first transducer 300 and the second transducer 400, the first spherical reflecting surface 510 and the second spherical reflecting surface 520 are determined. This helps to ensure that the reflection path of the ultrasonic signal in the ultrasonic metering device is precisely controlled, avoids the ultrasonic signal being scattered by the plane of the first wall surface 100 and the second wall surface 200, improves the propagation intensity of the ultrasonic signal, and thus improves the detection accuracy of the ultrasonic gas meter.

[0238] Along the direction perpendicular to the first transducer 300 to the second transducer 400, the point at which the distance between the spherical reflecting surface 500 and the first wall surface 100 is the fourth origin. The twenty-first ray and the twenty-second ray are drawn with the fourth origin as the origin. The twenty-first ray and the twenty-second ray are symmetrically distributed about the vertical line, and the angle between the twenty-first ray and the twenty-second ray is α1.

[0239] The twenty-first and twenty-second rays form the twenty-first and twenty-second base points with the first wall surface 100.

[0240] With the fourth origin as the center and the distance between the fourth origin and the 21st or 22nd base point as the radius, draw a circle to form a third circle, and form a third preset arc between the 21st and 22nd base points.

[0241] For example, the twenty-first and twenty-second base points are used to determine the reflection position of the ultrasonic signal on the first wall surface 100.

[0242] As one feasible implementation, the arc-shaped reflective surface 600 and the third circle coincide on the trajectory of the first wall surface 100.

[0243] By utilizing the motion trajectory of the ultrasonic signals emitted by the first transducer 300 and the second transducer 400, the arc-shaped reflecting surface 600 is determined. This helps to ensure that the reflection path of the ultrasonic signal in the ultrasonic metering device is precisely controlled, avoids the ultrasonic signal being scattered by the plane of the first wall 100 and the second wall 200, and improves the propagation intensity of the ultrasonic signal, thereby improving the detection accuracy of the ultrasonic gas meter.

[0244] In some embodiments, the arc length of the arc-shaped reflective surface 600 is greater than or equal to the arc length of the third preset arc.

[0245] By setting the arc length of the arc-shaped reflective surface 600 to be greater than or equal to the arc length of the preset arc, it is helpful to increase the area of ​​the arc-shaped reflective surface 600 to effectively capture and reflect the incident ultrasonic signal.

[0246] In some embodiments, the distance between the twenty-first base point and the twenty-second base point is D, and the width of the ultrasonic measuring device is B, wherein D and B satisfy: 0.5B≤D≤B.

[0247] By ensuring that the distance between the 21st and 22nd base points is within a reasonable range within the width of the ultrasonic metering device, the influence of the edge effect sidewall 700 on the propagation of ultrasonic signals can be reduced. This design helps to avoid uneven scattering and reflection of ultrasonic signals at the edge of the device.

[0248] Secondly, referring to Figure 10 and Figure 11 As shown, this application provides an ultrasonic measuring device, including:

[0249] A first wall 100, on which a first transducer 300 is provided;

[0250] The second wall 200 is disposed opposite to the first wall 100; a second transducer 400 is disposed on the second wall 200.

[0251] The ultrasonic signal generated by the first transducer 300 is reflected by the reflective surfaces of the second wall 200 and the first wall 100 and then received by the second transducer 400.

[0252] Among them, the reflecting surface of the first wall surface 100 is the third spherical reflecting surface 530, and the reflecting surface of the second wall surface 200 is the third arc-shaped reflecting surface 630.

[0253] For example, the third spherical reflective surface 530 on the first wall 100 can effectively focus ultrasonic signals. Through its curvature characteristics, the third spherical reflective surface 530 focuses the incident ultrasonic signal to a specific area, thereby improving the intensity and clarity of the ultrasonic signal. This helps reduce scattering and distortion of the ultrasonic signal.

[0254] The third arc-shaped reflective surface 630 on the second wall 200 helps guide and adjust the path of the ultrasonic signal. The third arc-shaped reflective surface 630 can maintain the directionality and consistency of the ultrasonic signal during reflection, thereby optimizing the signal transmission path and improving the signal transmission efficiency.

[0255] Along the direction from the first transducer 300 to the second transducer 400, with the center point of the emission structure surface of the first transducer 300 as the first origin, the twenty-third ray and the twenty-fourth ray are formed. The twenty-third ray and the twenty-fourth ray are symmetrical about the center line of the first transducer 300, and the included angle between the twenty-third ray and the twenty-fourth ray is α1.

[0256] The connection points between the 23rd and 24th rays and the second wall surface 200 are the 23rd base point and the 24th base point, respectively.

[0257] Using the parallel line passing through the twenty-third base point and perpendicular to the height direction of the ultrasonic measuring device as a mirror line, draw the symmetrical ray of the twenty-third ray to form the twenty-fifth ray.

[0258] Using the parallel line passing through the twenty-fourth base point and perpendicular to the height direction of the ultrasonic measuring device as a mirror line, draw the symmetrical ray of the twenty-fourth ray to form the twenty-sixth ray.

[0259] Along the arrangement direction of the second transducer 400 to the first transducer 300, with the center point of the emission structure surface of the second transducer 400 as the second origin, the twenty-seventh ray and the twenty-eighth ray are formed. The twenty-seventh ray and the twenty-eighth ray are symmetrical about the center line of the second transducer 400; the included angle between the twenty-seventh ray and the twenty-eighth ray is α2.

[0260] The 25th and 28th rays intersect at the 7th junction point, and the 26th and 27th rays intersect at the 8th junction point.

[0261] Both the seventh and eighth connection base points are located on the first wall surface 100.

[0262] The seventh connecting angle is formed between the 25th and 28th rays; the eighth connecting angle is formed between the 26th and 27th rays.

[0263] The point where the bisectors of the seventh and eighth connecting angles meet forms the fourth connecting point.

[0264] With the fourth connection point as the center and the distance between the fourth connection point and the seventh or eighth connection point as the radius, a fourth sphere is formed; the trajectory of the third spherical reflective surface 530 coincides with the trajectory of the fourth sphere.

[0265] For example, the connection points between the 23rd and 24th rays and the second wall 200 are the 23rd base point C23 and the 24th base point C24, respectively.

[0266] The 25th and 28th rays intersect at the seventh connecting point C7, and the 26th and 27th rays intersect at the eighth connecting point C8.

[0267] The fourth connection point is E4. Using E4 as the center, the distance between E4 and either the seventh or eighth connection point C7 is chosen as the radius to form the fourth sphere. The surface trajectory of the fourth sphere coincides with the trajectory of the designed third spherical reflector 530, ensuring that the shape of the third spherical reflector 530 can effectively focus and guide the ultrasonic signal.

[0268] Along the width of the ultrasonic measuring device, the 29th and 30th rays are formed with the first origin as the starting point. The 29th and 30th rays are symmetrically distributed about the vertical line, and the angle between the 29th and 30th rays is α1.

[0269] The 29th and 30th rays form the 29th and 30th base points with the second wall 200. A circle is drawn with the first origin as the center and the distance between the first origin and the 29th or 30th base point as the radius to form a fourth circle. A fourth preset arc is formed between the 29th and 30th base points.

[0270] For example, with the first origin O1 as the center, the distance between the first origin O1 and the twenty-ninth or thirtieth base point is selected as the radius to form a fourth circle. The arc portion between the twenty-ninth and thirtieth base points forms a fourth preset arc. The fourth preset arc and the fourth circle coincide on the trajectory of the second wall surface 200.

[0271] As one feasible implementation, the trajectories of the third arc-shaped reflective surface 630 and the fourth circle coincide on the second wall surface 200.

[0272] By utilizing the motion trajectory of the ultrasonic signals emitted by the first transducer 300 and the second transducer 400, determining the third arc-shaped reflective surface 630 helps ensure that the reflection path of the ultrasonic signal in the ultrasonic metering device is precisely controlled, avoiding the ultrasonic signal being scattered by the plane of the first wall surface 100 and the second wall surface 200, and improving the propagation intensity of the ultrasonic signal, thereby improving the detection accuracy of the ultrasonic gas meter.

[0273] In some embodiments, the arc length of the third arc-shaped reflective surface 630 is greater than or equal to the arc length of the fourth preset arc.

[0274] By setting the arc length of the third arc-shaped reflective surface 630 to be greater than or equal to the arc length of the fourth preset arc, it is helpful to increase the area of ​​the third arc-shaped reflective surface 630 to effectively capture and reflect the incident ultrasonic signal.

[0275] In other embodiments, the distance between the twenty-ninth base point and the thirtieth base point is E, and the width of the ultrasonic measuring device is B, wherein E and B satisfy: 0.5B≤E≤B.

[0276] By ensuring that the distance between the 29th base point C29 and the 30th base point C30 is within a reasonable range within the width of the ultrasonic metering device, the influence of the edge effect sidewall 700 on the propagation of ultrasonic signals can be reduced. This design helps to avoid uneven scattering and reflection of ultrasonic signals at the edge of the device.

[0277] Thirdly, embodiments of this application provide an ultrasonic gas meter, including an ultrasonic metering device.

[0278] It is understood that since the ultrasonic gas meter of this application adopts the technical solution of the above-described ultrasonic metering device embodiment, it at least has the beneficial effects brought about by the technical solution of the above-described ultrasonic metering device embodiment, which will not be elaborated here.

[0279] Finally, it should be noted that other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. An ultrasonic metering device, characterized by, include: A first wall surface (100) is provided with a first transducer (300) and a second transducer (400) spaced apart. The first transducer (300) and the second transducer (400) are symmetrically arranged with the parallel line of the height direction of the ultrasonic measuring device as the axis of symmetry. The second wall surface (200) is disposed opposite to the first wall surface (100); The ultrasonic signal generated by one of the first transducer (300) and the second transducer (400) is received by the other of the first transducer (300) and the second transducer (400) after passing through the reflecting surface of the second wall (200), the reflecting surface of the first wall (100), and the reflecting surface of the second wall (200). Among them, the reflective surface of one of the first wall surface (100) and the second wall surface (200) is a spherical reflective surface (500), and the reflective surface of the other of the first wall surface (100) and the second wall surface (200) is an arc-shaped reflective surface (600); Along the arrangement direction perpendicular to the first transducer (300) to the second transducer (400), the middle part of the arc-shaped reflective surface (600) is recessed relative to the two ends of the arc-shaped reflective surface (600) in a direction away from the interior of the ultrasonic measuring device.

2. The ultrasonic measuring device according to claim 1, characterized in that, The first wall surface (100) has a first reflective surface, and a portion of the first wall surface (100) is recessed in a direction away from the second wall surface (200) to form the first reflective surface; A portion of the second wall surface (200) is recessed in a direction away from the first wall surface (100) to form a second reflective surface; the second reflective surface includes a first sub-reflective surface and a second sub-reflective surface; Along the direction from the first transducer (300) to the second transducer (400), the first sub-reflective surface has a first end point and a second end point; The distance between the center point of the emitting structure surface of the first transducer (300) and the first endpoint is d1, and the radius of the first sub-reflecting surface is r1. The condition d1 and r1 satisfy: r1 > d1; Along the direction from the first transducer (300) to the second transducer (400), with the center point of the emission structure surface of the first transducer (300) as the first origin, a first ray and a second ray with an included angle of α1 are formed. The first ray and the second ray are symmetrical about the center line of the first transducer (300). The angle between the line connecting the first origin and the first endpoint and the center line of the first transducer is θ1. The θ1 and the α1 satisfy: θ1≥α1 / 2. Along the direction from the first transducer (300) to the second transducer (400), the second sub-reflective surface has a third end point and a fourth end point; The distance between the center point of the emitting structure surface of the second transducer (400) and the fourth endpoint is d2; the radius of the second sub-reflecting surface is r2; The condition d2 and r2 satisfy: r2 > d2; Along the direction from the second transducer (400) to the first transducer (300), with the center point of the emission structure surface of the second transducer (400) as the second origin, a fifth ray and a sixth ray with an included angle of α2 are formed. The fifth ray and the sixth ray are symmetrical about the center line of the second transducer (400). The angle between the line connecting the second origin and the second endpoint and the center line of the second transducer is θ2. The angle θ2 and the α2 satisfy: θ2≥α2 / 2.

3. The ultrasonic meter of claim 2, wherein, The first wall surface (100) has a spherical reflective surface (500), and a portion of the first wall surface (100) is recessed in a direction away from the second wall surface (200) to form the spherical reflective surface (500); A portion of the second wall surface (200) is recessed in a direction away from the first wall surface (100) to form the arc-shaped reflective surface (600); the arc-shaped reflective surface (600) includes a first arc-shaped reflective surface (610) and a second arc-shaped reflective surface; the first arc-shaped reflective surface (610) and the second arc-shaped reflective surface are spaced apart on the second wall surface (200); Along the direction from the first transducer (300) to the second transducer (400); the ultrasonic signal generated by the first transducer (300) is reflected sequentially by the first arc-shaped reflective surface (610), the spherical reflective surface (500), and the second arc-shaped reflective surface and then received by the second transducer (400).

4. The ultrasonic measuring device according to claim 3, characterized in that, The connection point between the first ray and the second wall surface (200) is the first base point; the connection point between the second ray and the second wall surface (200) is the second base point; Using a line passing through the first base point and parallel to the height direction of the ultrasonic measuring device as a mirror line, draw a symmetrical ray to form the third ray; Using a line passing through the second base point and parallel to the height direction of the ultrasonic measuring device as a mirror line, draw a symmetrical ray to form the fourth ray; The connection point between the fifth ray and the second wall surface (200) is the fifth base point; the connection point between the sixth ray and the second wall surface (200) is the sixth base point. Using a line passing through the fifth base point and parallel to the height direction of the ultrasonic measuring device as a mirror line, draw a symmetrical ray to form the seventh ray; Using a line passing through the sixth base point and parallel to the height direction of the ultrasonic measuring device as a mirror line, draw a symmetrical ray to form the eighth ray; The connection point of the third ray and the eighth ray forms a first connection base point, and the connection point of the fourth ray and the seventh ray forms a second connection base point; both the first connection base point and the second connection base point are located on the first wall surface (100); A first connection angle is formed between the third ray and the eighth ray; a second connection angle is formed between the fourth ray and the seventh ray; The point where the bisector of the first connecting angle and the bisector of the second connecting angle meet forms the first connecting point; A first sphere is formed with the first connection point as the center and the distance between the first connection point and the first connection base point or the second connection base point as the radius; the trajectory of the spherical reflective surface (500) coincides with the trajectory of the first sphere. The vertical distance between the first connecting base point and the first base point forms the height of the ultrasonic measuring device; and / or, the vertical distance between the second connecting base point and the second base point forms the height of the ultrasonic measuring device.

5. The ultrasonic measuring device according to claim 3, characterized in that, Along the direction perpendicular to the arrangement of the first transducer (300) and the second transducer (400), with the center point of the emission structure surface of the first transducer (300) as the first origin, a ninth ray and a tenth ray with an included angle of α1 are formed, and the ninth ray and the tenth ray are symmetrically distributed about the vertical line; The connection point between the ninth ray and the second wall surface (200) forms the ninth base point; the connection point between the tenth ray and the second wall surface (200) forms the tenth base point; A first circle is formed with the first origin as the center and the distance between the first origin and the ninth base point or the tenth base point as the radius. A first preset arc is formed between the ninth base point and the tenth base point. Along the arrangement direction perpendicular to the first transducer (300) and the second transducer (400), with the center point of the emission structure surface of the second transducer (400) as the second origin, an eleventh ray and a twelfth ray with an included angle of α2 are formed, and the eleventh ray and the twelfth ray are symmetrically distributed about the vertical line; The connection point between the eleventh ray and the second wall surface (200) forms the eleventh base point; the connection point between the twelfth ray and the second wall surface (200) forms the twelfth base point; With the second origin as the center and the distance between the second origin and the eleventh base point or the twelfth base point as the radius, a second circle is formed, and a second preset arc is formed between the eleventh base point and the twelfth base point; The arc length of the second preset arc is equal to the arc length of the first preset arc.

6. The ultrasonic measuring device according to claim 5, characterized in that, The first arc-shaped reflective surface (610) and the first circle coincide on the trajectory of the second wall surface (200); the second arc-shaped reflective surface and the second circle coincide on the trajectory of the second wall surface (200); Alternatively, the arc length of the first arc-shaped reflective surface (610) is greater than or equal to the arc length of the first preset arc; the arc length of the second arc-shaped reflective surface is greater than or equal to the arc length of the second preset arc. And / or, the distance between the ninth base point and the tenth base point is A, the width of the ultrasonic measuring device is B, and A and B satisfy: 0.5B≤A≤B; the distance between the eleventh base point and the twelfth base point is C, the width of the ultrasonic measuring device is B, and C and B satisfy: 0.5B≤C≤B.

7. The ultrasonic measuring device according to claim 2, characterized in that, The first wall surface (100) has an arc-shaped reflective surface (600), and a portion of the first wall surface (100) is recessed in a direction away from the second wall surface (200) to form the arc-shaped reflective surface (600); A portion of the second wall surface (200) is recessed in a direction away from the first wall surface (100) to form the spherical reflective surface (500); the spherical reflective surface (500) includes a first spherical reflective surface (510) and a second spherical reflective surface (520); the first spherical reflective surface (510) and the second spherical reflective surface (520) are spaced apart on the second wall surface (200); Along the direction from the first transducer (300) to the second transducer (400); the ultrasonic signal generated by the first transducer (300) passes sequentially through the first spherical reflective surface (510), the arc-shaped reflective surface (600), and the second spherical reflective surface (520) before being received by the second transducer (400).

8. The ultrasonic measuring device according to claim 7, characterized in that, The distance between the first transducer (300) and the second transducer (400) is the first distance, and the midpoint of the first distance is the first midpoint; Along the direction from the first transducer (300) to the second transducer (400), with the center point of the emission structure surface of the first transducer (300) as the first origin, a thirteenth ray and a fourteenth ray with an included angle of α1 are formed. The thirteenth ray and the fourteenth ray are symmetrical about the center line of the first transducer (300). With the center point of the emission structure surface of the second transducer (400) as the second origin, a fifteenth ray and a sixteenth ray with an included angle of α2 are formed. The fifteenth ray and the sixteenth ray are symmetrical about the center line of the second transducer (400). Using the first midpoint as the third origin, draw parallel lines to the thirteenth, fourteenth, fifteenth, and sixteenth rays respectively to form the seventeenth, eighteenth, nineteenth, and twentieth rays; The thirteenth ray and the twentieth ray intersect at a third connecting point, and the fourteenth ray and the nineteenth ray intersect at a fourth connecting point; the thirteenth ray and the twentieth ray form a third connecting angle, and the fourteenth ray and the nineteenth ray form a fourth connecting angle; The intersection of the bisector of the third connecting angle and the bisector of the fourth connecting angle forms the third connecting point. The third connecting point is the center of a sphere. A second sphere is formed with the distance between the third connecting point and the third connecting base point or the fourth connecting base point as the radius. The fifteenth and eighteenth rays intersect at the fifth connection point, and the sixteenth and seventeenth rays intersect at the sixth connection point; the fifteenth and eighteenth rays form a fifth connection angle, and the sixteenth and seventeenth rays form a sixth connection angle; The intersection of the bisector of the fifth connecting angle and the bisector of the sixth connecting angle is the third connecting point; a sphere is drawn with the third connecting point as the center and the distance between the third connecting point and the fifth or sixth connecting base point as the radius, forming a third sphere; Wherein, the trajectory of the first spherical reflective surface (510) coincides with the trajectory of the second sphere; the trajectory of the second spherical reflective surface (520) coincides with the trajectory of the third sphere; Along the direction perpendicular to the first transducer (300) to the second transducer (400), the point at which the distance between the spherical reflective surface (500) and the first wall surface (100) is the largest is taken as the fourth origin. The twenty-first ray and the twenty-second ray are drawn with the fourth origin as the origin. The twenty-first ray and the twenty-second ray are symmetrically distributed about the vertical line, and the angle between the twenty-first ray and the twenty-second ray is α2. The 21st ray and the 22nd ray form the 21st base point and the 22nd base point with the first wall surface (100); A third circle is formed with the fourth origin as the center and the distance between the fourth origin and the 21st or 22nd base point as the radius. A third preset arc is formed between the 21st and 22nd base points.

9. The ultrasonic measuring device according to claim 8, characterized in that, The arc-shaped reflective surface (600) and the third circle coincide on the trajectory of the first wall surface (100); Alternatively, the arc length of the arc-shaped reflective surface (600) is greater than or equal to the arc length of the third preset arc; And / or, the distance between the 21st base point and the 22nd base point is D, and the width of the ultrasonic measuring device is B, wherein D and B satisfy: 0.5B≤D≤B.

10. An ultrasonic measuring device, characterized in that, include: A first wall surface (100) is provided with a first transducer (300); A second wall surface (200) is disposed opposite to the first wall surface (100); a second transducer (400) is disposed on the second wall surface (200); The ultrasonic signal generated by the first transducer (300) is reflected by the reflective surface of the second wall (200) and the reflective surface of the first wall (100) and then received by the second transducer (400). The first wall surface (100) has a third spherical reflective surface (530), and the second wall surface (200) has a third arc-shaped reflective surface (630). Along the direction from the first transducer (300) to the second transducer (400), with the center point of the emission structure surface of the first transducer (300) as the first origin, a second thirteenth ray and a second fourteenth ray with an included angle of α1 are formed. The second thirteenth ray and the second fourteenth ray are symmetrical about the center line of the first transducer (300). The connection points between the 23rd ray and the 24th ray and the second wall surface (200) are the 23rd base point and the 24th base point, respectively; Using the parallel line passing through the 23rd base point and perpendicular to the height direction of the ultrasonic measuring device as a mirror line, draw the symmetrical ray of the 23rd ray to form the 25th ray; Using the parallel line passing through the 24th base point and perpendicular to the height direction of the ultrasonic measuring device as a mirror line, draw the symmetrical ray of the 24th ray to form the 26th ray; Along the arrangement direction from the second transducer (400) to the first transducer (300), with the center point of the emission structure surface of the second transducer (400) as the second origin, a twenty-seventh ray and a twenty-eighth ray with an included angle of α2 are formed. The twenty-seventh ray and the twenty-eighth ray are symmetrical about the center line of the second transducer (400). The 25th and 28th rays intersect at the 7th connecting point, and the 26th and 27th rays intersect at the 8th connecting point; The seventh and eighth connection base points are both located on the first wall surface (100); A seventh connecting angle is formed between the 25th and 28th rays; an eighth connecting angle is formed between the 26th and 27th rays; The point where the angle bisectors of the seventh connecting angle and the eighth connecting angle meet forms the fourth connecting point; A fourth sphere is formed by drawing a sphere with the fourth connection point as the center and the distance between the fourth connection point and the seventh or eighth connection base point as the radius; the trajectory of the third spherical reflective surface (530) coincides with the trajectory of the fourth sphere. Along the width direction of the ultrasonic measuring device, a 29th ray and a 30th ray are formed with an included angle of α1, starting from the first origin. The 29th ray and the 30th ray are symmetrically distributed about the perpendicular line. The 29th ray and the 30th ray form the 29th base point and the 30th base point with the second wall surface (200). A circle is drawn with the first origin as the center and the distance between the first origin and the 29th base point or the 30th base point as the radius to form a fourth circle. A fourth preset arc is formed between the 29th base point and the 30th base point.

11. The ultrasonic measuring device according to claim 10, characterized in that, The trajectories of the third arc-shaped reflective surface (630) and the fourth circular surface coincide on the second wall surface (200); Alternatively, the arc length of the third arc-shaped reflective surface (630) is greater than or equal to the arc length of the fourth preset arc; And / or, the distance between the 29th base point and the 30th base point is E, the width of the ultrasonic measuring device is B, and E and B satisfy: 0.5B≤E≤B.

12. An ultrasonic gas meter, comprising the ultrasonic metering device according to any one of claims 1-11.

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