Zero-flow output compensation device of ultrasonic water meter

Abstract

The utility model discloses a zero flow output compensation device of an ultrasonic water meter, which comprises an auxiliary correction transducer group, an auxiliary correction transducer group, an auxiliary correction transducer group and an auxiliary correction transducer group, the auxiliary correction transducer group comprises a first transducer and a second transducer, and the first transducer and the second transducer are matched with each other; the ultrasonic propagation piece is at least provided with a first end portion propagation section and a second end portion propagation section, the first end portion propagation section and the second end portion propagation section are arranged in a non-coaxial mode, the first transducer is arranged at the end portion of the first end portion propagation section, and the second transducer is arranged at the end portion of the second end portion propagation section. The first energy converter is arranged at the end part of the first end part propagation section, the second energy converter is arranged at the end part of the second end part propagation section, at least one reflecting surface is also arranged in the ultrasonic wave propagation part, the position of the reflecting surface corresponds to the position of the first energy converter, and the position of the reflecting surface corresponds to the position of the second energy converter. The problem that the zero flow output compensation device of the ultrasonic water meter is inconvenient to install can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of water meters, in particular to a zero-flow output compensation device for an ultrasonic water meter. Background Art

[0002] The main factor affecting the long-term working stability of ultrasonic water meters is the counting "drift" problem inherent in precision timing chips. As time goes by, the measurement time difference of ultrasonic water meters at zero flow (flow velocity) will have a non-zero value phenomenon, and its value will change very slowly over time. This is a kind of "creep" that has no rules and does not conform to random distribution, usually called "time drift". Due to the existence of time drift, the instantaneous flow value and cumulative flow value measured by the ultrasonic water meter will also change synchronously, resulting in an increase in its measurement error and a decrease in measurement accuracy.

[0003] Since time drift is a slowly changing creep, it cannot be eliminated or weakened through data processing.

[0004] Before the ultrasonic water meter leaves the factory, it is necessary to set the abnormal output value (i.e., zero flow output value) of the ultrasonic water meter to zero under the condition of zero flow (flow velocity), and calibrate the indication of each flow point with a standard value to determine the measurement error of each flow point of the water meter. According to the above analysis, when the flow (flow velocity) is zero, the time difference should be zero, so the calculated values ​​of instantaneous flow and cumulative flow are also zero. The actual situation is that, as time passes, the time difference of the calibrated ultrasonic water meter under the condition of zero flow (flow velocity) is not zero, but also changes slowly. This factor will cause the indication error of the small flow measurement section of the ultrasonic water meter that has passed the factory calibration to change after a period of use, and some even exceed the maximum allowable error range specified by the standard.

[0005] At present, a Chinese patent with publication number CN205246150U discloses an ultrasonic water meter that automatically corrects zero drift, which can eliminate the zero drift effect in the measurement result and maintain the accuracy of ultrasonic water meter measurement. However, the two transducers of the auxiliary correction transducer group in the patent are relatively arranged. In order to be close to the sound channel length of the measuring transducer and facilitate the accuracy of the zero flow output value correction, the two transducers need to be sufficiently far apart, resulting in the need to reserve a sufficiently long installation space in the water meter, which is not convenient for installation. Utility Model Content

[0006] The utility model provides a zero-flow output compensation device for an ultrasonic water meter, which can solve the problem of inconvenient installation of the zero-flow output compensation device for an ultrasonic water meter.

[0007] In order to solve the above technical problems, the utility model provides an ultrasonic water meter zero flow output compensation device, which is characterized by comprising:

[0008] An auxiliary calibration transducer group, comprising a first transducer and a second transducer, wherein the first transducer and the second transducer cooperate with each other, and the first transducer and the second transducer are used to detect the ultrasonic wave propagation time difference of the transducer without flow interference;

[0009] An ultrasonic propagation member, wherein the ultrasonic propagation member is provided with at least a first end propagation segment and a second end propagation segment, the first end propagation segment and the second end propagation segment are non-coaxially arranged, the first transducer is arranged at the end of the first end propagation segment, the second transducer is arranged at the end of the second end propagation segment, and at least one reflecting surface is further arranged in the ultrasonic propagation member, the position of the reflecting surface corresponds to the position of the first transducer, and the position of the reflecting surface corresponds to the position of the second transducer.

[0010] As a preferred embodiment of the above technical solution, the first end propagation segment and the second end propagation segment are arranged perpendicular to each other, the reflecting surface is arranged at the connection between the first end propagation segment and the second end propagation segment, the angle between the central axis of the first end propagation segment and the reflecting surface is 45°, and the angle between the central axis of the second end propagation segment and the reflecting surface is 45°.

[0011] As a preferred embodiment of the above technical solution, the ultrasonic propagation component is an ultrasonic propagation tube, the ultrasonic propagation tube is filled with water, a reflective sheet is provided at the connection between the first end propagation section and the second end propagation section, and the reflective sheet has the reflective surface.

[0012] As a preferred embodiment of the above technical solution, the material of the ultrasonic propagation component is impedance matching material, the ultrasonic propagation component is a solid ultrasonic propagation component, the first end propagation segment and the second end propagation segment are integrated, and the connection between the first end propagation segment and the second end propagation segment forms the reflecting surface.

[0013] As a preferred embodiment of the above technical solution, the ultrasonic propagation component is also provided with a middle propagation section, and the ultrasonic propagation component is sequentially provided with a first end propagation section, a middle propagation section and a second end propagation section, the reflecting surface includes a first reflecting surface and a second reflecting surface, a first reflecting surface is provided at the connection between the first end propagation section and the middle propagation section, a second reflecting surface is provided at the connection between the middle propagation section and the third section, an angle between a central axis of the first end propagation section and the first reflecting surface is the same as an angle between a central axis of the middle propagation section and the first reflecting surface, an angle between a central axis of the middle propagation section and the second reflecting surface is the same as an angle between a central axis of the second end propagation section and the second reflecting surface.

[0014] As a preferred embodiment of the above technical solution, the first end propagation segment and the middle propagation segment are arranged perpendicular to each other, the middle propagation segment and the second end propagation segment are arranged perpendicular to each other, the central axis of the first end propagation segment and the first reflecting surface are at an angle of 45°, the central axis of the middle propagation segment and the first reflecting surface are at an angle of 45°, the central axis of the middle propagation segment and the second reflecting surface are at an angle of 45°, and the central axis of the second end propagation segment and the second reflecting surface are at an angle of 45°.

[0015] As a preferred embodiment of the above technical solution, the ultrasonic propagation component is an ultrasonic propagation tube, and the ultrasonic propagation tube is filled with water.

[0016] As a preferred embodiment of the above technical solution, a first reflector is provided at the connection between the first end propagation segment and the middle propagation segment, and the first reflector has the reflective surface; a second reflector is provided at the connection between the middle propagation segment and the second end propagation segment, and the second reflector has the second reflective surface.

[0017] As a preferred embodiment of the above technical solution, the material of the ultrasonic propagation component is impedance matching material, the ultrasonic propagation component is a solid ultrasonic propagation component, the first end propagation segment, the middle propagation segment and the second end propagation segment are integrated, the connection between the first end propagation segment and the middle propagation segment forms the first reflection surface, and the connection between the middle propagation segment and the second end propagation segment forms the second reflection surface.

[0018] As a preferred embodiment of the above technical solution, the diameter of the ultrasonic transmission element is 5 to 20 mm.

[0019] The utility model provides an ultrasonic water meter zero flow output compensation device, characterized in that it includes: an auxiliary correction transducer group and an ultrasonic propagation element, the first transducer and the second transducer are used to detect the ultrasonic propagation time difference of the transducer without flow interference, the ultrasonic propagation element is at least provided with a first end propagation section and a second end propagation section, the first transducer is arranged at the end of the first end propagation section, the second transducer is arranged at the end of the second end propagation section, the ultrasonic energy emitted by the first transducer can propagate in the first end propagation section, and is reflected by the reflection surface to the second end propagation section for propagation and finally The second transducer receives; similarly, the ultrasonic wave emitted by the second transducer is reflected by the reflecting surface and finally received by the first transducer; the ultrasonic wave is reflected by the reflecting surface, thereby changing the direction of ultrasonic wave propagation. When the length of the ultrasonic wave propagation path is the same, the distance between the first transducer and the second transducer can be shortened, thereby reducing the length of the installation space and solving the problem of inconvenient installation; since the ultrasonic waves between the transducers of the auxiliary correction transducer group will not be disturbed by the flow rate (flow velocity) and the like during propagation, the time difference thereof is equivalent to the time difference value of the ultrasonic water meter under the condition of zero flow rate (flow velocity). In this way, when the precision timing chip causes the auxiliary correction transducer group to output a value due to time drift, it can be considered that the measurement result of the ultrasonic transducer for measurement also contains a time drift influence of equivalent value. Therefore, the zero drift influence in the measurement result can be eliminated to maintain the accuracy of ultrasonic water meter measurement.

[0020] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0022] Figure 2 This is a schematic diagram of the structure of Embodiment 2 of the present utility model;

[0023] Figure 3 This is a schematic diagram of the structure of Embodiment 3 of the present utility model;

[0024] Figure 4 This is a schematic diagram of the structure of Embodiment 4 of the present utility model;

[0025] In the figure: 1, auxiliary correction transducer group; 2, ultrasonic propagation element; 3, reflection surface; 101, first transducer; 102, second transducer; 201, first end propagation section; 202, middle propagation section; 203, second end propagation section; 301, reflection plate; 302, first reflection surface; 303, second reflection surface; 304, first reflection plate; 305, second reflection plate. DETAILED DESCRIPTION

[0026] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0027] Example 1, see Figure 1 The utility model provides an ultrasonic water meter zero flow output compensation device, which is characterized by comprising:

[0028] The auxiliary calibration transducer group 1 includes a first transducer 101 and a second transducer 102, wherein the first transducer 101 and the second transducer 102 cooperate with each other, and the first transducer 101 and the second transducer 102 are used to detect the ultrasonic wave propagation time difference of the transducer without flow interference;

[0029] An ultrasonic propagation member 2, wherein the ultrasonic propagation member 2 is provided with at least a first end propagation segment 201 and a second end propagation segment 203, wherein the first end propagation segment 201 and the second end propagation segment 203 are non-coaxially arranged, the first transducer 101 is arranged at the end of the first end propagation segment 201, and the second transducer 102 is arranged at the end of the second end propagation segment 203, and at least one reflecting surface 3 is further arranged in the ultrasonic propagation member, and the position of the reflecting surface 3 corresponds to the position of the first transducer 101, and the position of the reflecting surface 3 corresponds to the position of the second transducer 102.

[0030] The utility model provides an ultrasonic water meter zero flow output compensation device, characterized in that it includes: an auxiliary correction transducer group 1 and an ultrasonic propagation element 2, the first transducer 101 and the second transducer 102 are used to detect the ultrasonic propagation time difference of the transducer without flow interference, the first transducer 101 and the second transducer 102 are used to detect the ultrasonic propagation time difference of the transducer without flow interference, the ultrasonic propagation element 2 is at least provided with a first end propagation section 201 and a second end propagation section 203, the first transducer 101 is arranged at the end of the first end propagation section 201, the second transducer 102 is arranged at the end of the second end propagation section 203, and the ultrasonic energy emitted by the first transducer 101 can propagate in the first end propagation section 201. , and is reflected by the reflection surface 3 to the second end propagation section 203 to propagate and finally be received by the second transducer 102; similarly, the ultrasonic wave emitted by the second transducer 102 is reflected by the reflection surface 3 and finally received by the first transducer 101; the ultrasonic wave is reflected by the reflection surface 3, thereby changing the direction of ultrasonic wave propagation, and in the case of the same ultrasonic wave propagation path length, the distance between the first transducer 101 and the second transducer 102 can be shortened, thereby reducing the length of the installation space and solving the problem of inconvenient installation; since the ultrasonic waves between the transducers of the auxiliary correction transducer group 1 will not be disturbed by the flow rate (flow velocity) and the like during propagation, the time difference thereof is equivalent to the time difference value of the ultrasonic water meter under the condition of zero flow rate (flow velocity). In this way, when the precision timing chip causes the auxiliary correction transducer group 1 to output a value due to time drift, it can be considered that the measurement result of the ultrasonic transducer for measurement also contains a time drift influence of equivalent value. Therefore, the zero drift influence in the measurement result can be eliminated to maintain the accuracy of ultrasonic water meter measurement.

[0031] In a further implementable embodiment of the present invention, the first end propagation segment 201 and the second end propagation segment are arranged perpendicular to each other, the reflecting surface 3 is arranged at the connection between the first end propagation segment 201 and the second end propagation segment, the central axis of the first end propagation segment 201 and the reflecting surface 3 include an angle of 45°, and the central axis of the second end propagation segment 203 and the reflecting surface 3 include an angle of 45°.

[0032] In this embodiment, the first end propagation segment 201 and the second end propagation segment are arranged perpendicular to each other, the central axis of the first end propagation segment 201 and the reflecting surface 3 form an angle of 45°, and the central axis of the second end propagation segment 203 and the reflecting surface 3 form an angle of 45°, so that the ultrasonic waves emitted by the first transducer 101 and the second transducer 102 can change the propagation direction by 90°. When the length of the ultrasonic propagation path is consistent, it is ensured that the distance between the first transducer 101 and the second transducer 102 can be shortened, thereby reducing the length of the installation space and solving the problem of inconvenient installation; when the length of the installation space is consistent, the length of the ultrasonic propagation path can be increased, which can be closer to the acoustic channel length of the measuring transducer, thereby improving the accuracy of the correction of the zero flow output value.

[0033] In a further implementable embodiment of the present invention, the ultrasonic propagation element 2 is an ultrasonic propagation tube, the ultrasonic propagation tube is filled with water, a reflective sheet 301 is provided at the connection between the first end propagation segment 201 and the second end propagation segment 203, and the reflective sheet 301 has the reflective surface 3.

[0034] In this embodiment, the ultrasonic propagation tube is filled with water, and the ultrasonic waves emitted by the first transducer 101 and the second transducer 102 propagate in the water in the ultrasonic propagation tube, so that the ultrasonic propagation tube is closer to the working state of the water pipe, making the measurement result more accurate, and the reflector 301 plays the effect of reflecting ultrasonic waves.

[0035] In a further feasible embodiment of the present invention, the diameter of the ultrasonic transmission element 2 is 5 to 20 mm.

[0036] In this embodiment, the diameter of the ultrasonic propagation element 2 is 5 to 20 mm, which is the same as the diameter of the measuring pipe section in a general ultrasonic water meter, so that the ultrasonic propagation tube is closer to the working state of the water pipe, making the measurement result more accurate.

[0037] Example 2, see Figure 2 The only difference between this embodiment 2 and embodiment 1 is that the material of the ultrasonic propagation component 2 is impedance matching material, the ultrasonic propagation component 2 is a solid ultrasonic propagation component 2, the first end propagation segment 201 and the second end propagation segment 203 are integrated, and the connection between the first end propagation segment 201 and the second end propagation segment forms the reflecting surface 3.

[0038] In this embodiment, the ultrasonic propagation member 2 is a solid ultrasonic propagation member 2, and the material of the ultrasonic propagation member 2 is an impedance matching material, such as engineering plastics. The first propagation section, the second end propagation section and the third propagation section are integrally formed, making the ultrasonic propagation member easier to process, thereby improving production efficiency and being easier to use. The reflective surface 3 is integrally formed, and there is no need to add a reflective sheet 301, thereby reducing the difficulty of processing and improving production efficiency.

[0039] Example 3, see Figure 3 The difference between this embodiment 3 and embodiment 1 is that the ultrasonic propagation element 2 is further provided with a middle propagation section 202, and the ultrasonic propagation element 2 is sequentially provided with a first end propagation section 201, a middle propagation section 202 and a second end propagation section 203, the reflecting surface 3 includes a first reflecting surface 302 and a second reflecting surface 303, a first reflecting surface 302 is provided at the connection between the first end propagation section 201 and the middle propagation section 202, a second reflecting surface 303 is provided between the middle propagation section 202 and the second end propagation section, an angle between the central axis of the first end propagation section 201 and the first reflecting surface 302 is the same as an angle between the central axis of the middle propagation section 202 and the first reflecting surface 302, an angle between the central axis of the middle propagation section 202 and the second reflecting surface 303 is the same as an angle between the central axis of the second end propagation section 203 and the second reflecting surface 303.

[0040] In this embodiment, the ultrasonic propagation element 2 is provided with a first propagation section, a second end propagation section and a third propagation section in sequence, the first transducer 101 is arranged at the end of the first propagation section, and the second transducer 102 is arranged at the end of the third propagation section, the ultrasonic wave emitted by the first transducer 101 can propagate in the first propagation section, and is reflected by the first reflecting surface 302 to the second end propagation section for propagation, and then is reflected by the second reflecting surface 303 to the third propagation section for propagation and is finally received by the second transducer 102; similarly, the ultrasonic wave emitted by the second transducer 102 is reflected by the second reflecting surface 303 and the first reflecting surface 302, and is finally received by the first transducer 101; the ultrasonic wave is reflected by the first reflecting surface 302 and the first reflecting surface 303. The reflection of the two reflecting surfaces 303 can change the direction of ultrasonic propagation. When the length of the ultrasonic propagation path is consistent, the distance between the first transducer 101 and the second transducer 102 can be shortened, thereby reducing the length of the installation space and solving the problem of inconvenient installation. The angle between the central axis of the first propagation segment and the first reflecting surface 302 is the same as the angle between the central axis of the second end propagation segment and the first reflecting surface 302, and the angle between the central axis of the second end propagation segment and the second reflecting surface 303 is the same as the angle between the central axis of the third propagation segment and the second reflecting surface 303, ensuring that the ultrasonic wave can be accurately reflected into the propagation segment after being reflected by the first reflecting surface 302 and the second reflecting surface 303, reducing the energy loss after reflection and ensuring measurement accuracy.

[0041] In a further implementable embodiment of the present embodiment, the first propagation segment and the second end propagation segment are arranged perpendicular to each other, the second end propagation segment and the third propagation segment are arranged perpendicular to each other, the central axis of the first end propagation segment 201 and the first reflecting surface 302 are at an angle of 45°, the central axis of the middle propagation segment 202 and the first reflecting surface 302-204 are at an angle of 45°, the central axis of the middle propagation segment 202 and the second reflecting surface 303-205 are at an angle of 45°, and the central axis of the second end propagation segment 203 and the second reflecting surface 303-205 are at an angle of 45°.

[0042] In this embodiment, the first end propagation section 201 and the middle propagation section 202 are perpendicularly arranged, and the middle propagation section 202 and the second end propagation section 203 are perpendicularly arranged, so that the ultrasonic propagation member 2 as a whole is in an "L" shape. The first transducer 101 is arranged at the end of the first end propagation section 201, and the second transducer 102 is arranged at the end of the second end propagation section 203, so that the ultrasonic waves emitted by the first transducer 101 and the second transducer 102 can reverse the propagation direction. When the ultrasonic propagation path lengths are the same, it is ensured that the distance between the first transducer 101 and the second transducer 102 can be shortened, thereby reducing the length of the installation space and solving the problem of inconvenient installation; when the length of the installation space is the same, the length of the ultrasonic propagation path can be increased, which can be closer to the channel length of the measuring transducer and improve the accuracy of zero-flow output value correction. The included angles between the central axis of the first end propagation section 201 and the first reflection surface 302, between the central axis of the middle propagation section 202 and the first reflection surface 302, between the central axis of the middle propagation section 202 and the second reflection surface 303, and between the central axis of the second end propagation section 203 and the second reflection surface 303 are all 45°, ensuring that after the ultrasonic waves are reflected by the first reflection surface 302 and the second reflection surface 303, they can be accurately reflected into the propagation section, reducing the energy loss after reflection and ensuring the measurement accuracy.

[0043] In a further implementable manner of this embodiment, the ultrasonic propagation member 2 is an ultrasonic propagation tube, and the ultrasonic propagation tube is filled with water.

[0044] In this embodiment, the ultrasonic propagation member 2 is an ultrasonic propagation tube, and the ultrasonic propagation tube is filled with water. The ultrasonic waves emitted by the first transducer 101 and the second transducer 102 propagate in the water in the ultrasonic propagation tube, making the ultrasonic propagation tube closer to the working state of the water pipe and making the measurement result more accurate.

[0045] In a further implementable manner of this embodiment, a first reflection sheet 304 is provided at the connection between the first end propagation section 201 and the middle propagation section 202. The first reflection sheet 304 has the reflection surface 3. A second reflection sheet 305 is provided at the connection between the middle propagation section 202 and the second end propagation section 203. The second reflection sheet 305 has the second reflection surface 303.

[0046] In this embodiment, a first reflector 304 is provided at the connection between the first end propagation segment 201 and the middle propagation segment 202, and a second reflector 305 is provided at the connection between the middle propagation segment 202 and the second end propagation segment 203. The first reflector 304 and the second reflector 305 have the effect of reflecting ultrasonic waves.

[0047] Example 4, see Figure 4 The only difference between Example 4 and Example 3 is that the material of the ultrasonic propagation element 2 is impedance matching material, the ultrasonic propagation element 2 is a solid ultrasonic propagation element 2, the first end propagation segment 201, the middle propagation segment 202 and the second end propagation segment 203 are integrated, the connection between the first end propagation segment 201 and the middle propagation segment 202 forms the first reflection surface 302, and the connection between the middle propagation segment 202 and the second end propagation segment 203 forms the second reflection surface 303.

[0048] In this embodiment, the ultrasonic propagation member 2 is a solid ultrasonic propagation member 2, and the material of the ultrasonic propagation member 2 is an impedance matching material, such as engineering plastics. The first end propagation section 201, the middle propagation section 202 and the second end propagation section 203 are integrally formed, making the ultrasonic propagation member easier to process, thereby improving production efficiency and being easier to use. The first reflection surface 302 and the second reflection surface 303 are integrally formed, and there is no need to add a reflection sheet 301, thereby reducing the difficulty of processing and improving production efficiency.

[0049] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0050] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0051] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An ultrasonic water meter zero flow output compensation device, characterized in that: include: an auxiliary calibration transducer group, comprising a first transducer and a second transducer, wherein the first transducer and the second transducer cooperate with each other; An ultrasonic propagation member, wherein the ultrasonic propagation member is provided with at least a first end propagation segment and a second end propagation segment, the first end propagation segment and the second end propagation segment are non-coaxially arranged, the first transducer is arranged at the end of the first end propagation segment, the second transducer is arranged at the end of the second end propagation segment, and at least one reflecting surface is further arranged in the ultrasonic propagation member, the position of the reflecting surface corresponds to the position of the first transducer, and the position of the reflecting surface corresponds to the position of the second transducer.

2. The ultrasonic water meter zero flow output compensation device according to claim 1, characterized in that: The first end propagation segment and the second end propagation segment are arranged perpendicular to each other, and the reflecting surface is arranged at the connection between the first end propagation segment and the second end propagation segment. The angle between the central axis of the first end propagation segment and the reflecting surface is 45°, and the angle between the central axis of the second end propagation segment and the reflecting surface is 45°.

3. The ultrasonic water meter zero flow output compensation device according to claim 2, characterized in that: The ultrasonic propagation component is an ultrasonic propagation tube, the ultrasonic propagation tube is filled with water, a reflective sheet is provided at the connection between the first end propagation section and the second end propagation section, and the reflective sheet has the reflective surface.

4. The ultrasonic water meter zero flow output compensation device according to claim 2, characterized in that: The material of the ultrasonic propagation component is impedance matching material, the ultrasonic propagation component is a solid ultrasonic propagation component, the first end propagation segment and the second end propagation segment are integrated, and the connection between the first end propagation segment and the second end propagation segment forms the reflection surface.

5. The ultrasonic water meter zero flow output compensation device according to claim 1, characterized in that: The ultrasonic propagation component is also provided with a middle propagation section, and the ultrasonic propagation component is sequentially provided with a first end propagation section, a middle propagation section and a second end propagation section, the reflecting surface includes a first reflecting surface and a second reflecting surface, the first end propagation section and the middle propagation section are connected with a first reflecting surface, the middle propagation section and the second end propagation section are provided with a second reflecting surface, the angle between the central axis of the first end propagation section and the first reflecting surface is the same as the angle between the central axis of the middle propagation section and the first reflecting surface, and the angle between the central axis of the middle propagation section and the second reflecting surface is the same as the angle between the central axis of the second end propagation section and the second reflecting surface.

6. The ultrasonic water meter zero flow output compensation device according to claim 5, characterized in that: The first end propagation segment and the middle propagation segment are arranged perpendicularly to each other, the middle propagation segment and the second end propagation segment are arranged perpendicularly to each other, the angle between the central axis of the first end propagation segment and the first reflecting surface is 45°, the angle between the central axis of the middle propagation segment and the first reflecting surface is 45°, the angle between the central axis of the middle propagation segment and the second reflecting surface is 45°, and the angle between the central axis of the second end propagation segment and the second reflecting surface is 45°.

7. The ultrasonic water meter zero flow output compensation device according to claim 6, characterized in that: The ultrasonic propagation component is an ultrasonic propagation tube, and the ultrasonic propagation tube is filled with water.

8. The ultrasonic water meter zero flow output compensation device according to claim 7, characterized in that: A first reflector having the reflective surface is disposed at the connection between the first end propagation segment and the middle propagation segment, and a second reflector having the second reflective surface is disposed at the connection between the middle propagation segment and the second end propagation segment.

9. The ultrasonic water meter zero flow output compensation device according to claim 6, characterized in that: The material of the ultrasonic propagation component is impedance matching material, and the ultrasonic propagation component is a solid ultrasonic propagation component. The first end propagation section, the middle propagation section and the second end propagation section are integrated into one piece. The connection between the first end propagation section and the middle propagation section forms the first reflection surface, and the connection between the middle propagation section and the second end propagation section forms the second reflection surface.

10. The ultrasonic water meter zero flow output compensation device according to claim 1, characterized in that: The diameter of the ultrasonic propagation element is 5 to 20 mm.

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