Apparatus for measuring acoustic transit time

Abstract

The application discloses a kind of sound wave fly time measuring devices, belong to sound wave measurement field.The sound wave fly time measuring device includes: pulse generator, transducer component, comparator component, gate component, time measurement component and control component;Pulse generator is electrically connected with transducer component, transducer component is electrically connected with comparator component, comparator component is with gate component, gate component is electrically connected with time measurement component, pulse generator, transducer component, comparator component, gate component and time measurement component are electrically connected with control component;Gate component includes first mode and second mode, in the case where gate component is in first mode, sound wave fly time measuring device measures sound wave fly time according to first measurement mode;In the case where gate component is in second mode, sound wave fly time measuring device measures sound wave fly time according to second measurement mode.

Description

Technical Field

[0001] This application belongs to the field of acoustic wave measurement, and specifically relates to a device for measuring the time of flight of acoustic waves. Background Technology

[0002] With the development of technology, the application of ultrasonic measurement is becoming increasingly widespread. Specifically, the transmission time of ultrasonic waves in a measuring tube is affected by factors such as the fluid type and flow rate. Therefore, by measuring the transmission time of ultrasonic waves in the measuring tube, parameters such as the flow rate and volume of the fluid can be determined. In this method, an excitation transducer is installed at one end of the measuring tube, and a response transducer is installed at the other end. The excitation transducer generates ultrasonic waves upon stimulation, which then propagate through the measuring tube to the response transducer. The time it takes for the ultrasonic waves to travel through the fluid in the measuring tube is considered the time interval between the generation of the ultrasonic waves by the excitation transducer and the reception of the ultrasonic waves by the response transducer; this time is also called the ultrasonic flight time. However, in related technologies, the measuring device modes are relatively simple, making it difficult to verify the measurement results online during equipment operation. Utility Model Content

[0003] The purpose of this application is to provide a device for measuring the time of flight of sound waves, at least to solve the problem that the measuring device has a relatively simple mode and it is difficult to verify the measurement results of the measuring device online during the online operation of the equipment.

[0004] This application provides a device for measuring the time of flight of a sound wave, which includes: a pulse generator, a transducer assembly, a comparator assembly, a gating assembly, a time measurement assembly, and a control assembly. The pulse generator is electrically connected to the transducer assembly, the transducer assembly is electrically connected to the comparator assembly, the comparator assembly is electrically connected to the gating assembly, the gating assembly is electrically connected to the time measurement assembly, and the pulse generator, the transducer assembly, the comparator assembly, the gating assembly, and the time measurement assembly are all electrically connected to the control assembly. The gating assembly includes a first mode and a second mode. When the gating assembly is in the first mode, the sound wave transit time measuring device measures the sound wave transit time according to the first measurement mode; when the gating assembly is in the second mode, the sound wave transit time measuring device measures the sound wave transit time according to the second measurement mode.

[0005] Optionally, the comparator assembly includes a first comparator and a second comparator, the gating assembly includes a first gating, and the time measurement assembly includes a first time measurement element and a second time measurement element; Both the first comparator and the second comparator are electrically connected to the transducer assembly. Both the first comparator and the second comparator are electrically connected to the first gate. The first gate is electrically connected to the first time measurement element, and the second comparator is electrically connected to the second time measurement element. When the selector assembly is in a first mode, the first selector selects its first branch to connect the first comparator and the first time measuring element, and the second selector disconnects its second branch to disconnect the second comparator and the first time measuring element, so that the first comparator transmits a signal to the first time measuring element, and the second comparator transmits a signal to the second time measuring element; when the selector assembly is in a second mode, the first selector selects its second branch to connect the second comparator and the first time measuring element, and the first selector disconnects its first branch to disconnect the first comparator and the first time measuring element, so that the second comparator transmits a signal to both the first time measuring element and the second time measuring element.

[0006] Optionally, the comparator assembly includes a third comparator, a fourth comparator, and a fifth comparator; the gating assembly includes a second gating and a third gating; and the time measurement assembly includes a first time measurement element and a second time measurement element. The third comparator, the fourth comparator, and the fifth comparator are all electrically connected to the transducer assembly. The third comparator is electrically connected to the second gate, the second gate is electrically connected to the first time measurement element, the fourth comparator is electrically connected to the third gate, the third gate is electrically connected to the second time measurement element, and the fifth comparator is electrically connected to both the second gate and the third gate. When the selector assembly is in the first mode, the second selector selects its first branch to connect the third comparator and the first time measuring element, and the first selector disconnects its second branch to disconnect the fifth comparator and the first time measuring element. The third selector selects its first branch to connect the fourth comparator and the second time measuring element, and the third selector disconnects its second branch to disconnect the fifth comparator and the second time measuring element, so that the third comparator transmits a signal to the first time measuring element, and the fourth comparator transmits a signal to the second time measuring element. When the selector assembly is in the second mode, the second selector connects the fifth comparator and the first time measuring element, and disconnects the third comparator and the first time measuring element. The third selector connects the fifth comparator and the second time measuring element, and disconnects the fourth comparator and the second time measuring element, so that the fifth comparator transmits a signal to both the first and second time measuring elements.

[0007] Optionally, the comparator assembly includes a sixth comparator, the gating assembly includes a fourth gating, and the time measurement assembly includes a first time measurement element and a second time measurement element; The sixth comparator is electrically connected to the transducer assembly, the sixth comparator is electrically connected to the fourth selector, the fourth selector is electrically connected to the transducer assembly, and the fourth selector is electrically connected to the first time measuring element and the second time measuring element respectively. When the gating assembly is in the first mode, the fourth gating selects its first branch to connect the sixth comparator to the first and second time measuring elements, and disconnects its second branch to disconnect the transducer from the first and second time measuring elements, so that the sixth comparator transmits a signal to the first and second time measuring elements. When the gating assembly is in the second mode, the fourth gating selects its second branch to connect the transducer assembly to the first and second time measuring elements, and disconnects its first branch to disconnect the sixth comparator from the first and second time measuring elements, so that the transducer assembly transmits a signal to the first and second time measuring elements.

[0008] Optionally, the pulse generator includes a first pulse generating element and a second pulse generating element; Both the first pulse generating element and the second pulse generating element are electrically connected to the transducer assembly. The first pulse generating element and the first time measuring element are integrated into one unit, and the second pulse generating element and the second time measuring element are integrated into one unit.

[0009] Optionally, the device for measuring the time of flight of the sound wave further includes an OR gate; The OR gate is electrically connected to the pulse generator, the first time measurement element, and the second time measurement element.

[0010] Optionally, the device for measuring the time of flight of the sound wave further includes an external gate; The external selector is electrically connected to the pulse generator, the first time measurement element, and the second time measurement element.

[0011] Optionally, the device for measuring the time of acoustic wave flight further includes an echo selector; The transducer assembly is electrically connected to the comparator assembly via the echo gate.

[0012] Optionally, the transducer assembly includes a first transducer and a second transducer; Both the first transducer and the second transducer are electrically connected to the pulse generator, and both the first transducer and the second transducer are electrically connected to the echo selector. When the first transducer emits an ultrasonic wave, the second transducer receives the ultrasonic wave, and the echo gate connects the second transducer and the comparator assembly; when the second transducer emits an ultrasonic wave, the first transducer receives the ultrasonic wave, and the echo gate connects the first transducer and the comparator assembly.

[0013] Optionally, the device for measuring the time of flight of the sound wave further includes a first driver and a second driver; Both the first driver and the second driver are electrically connected to the pulse generator. The first driver is electrically connected to the first transducer, and the second driver is electrically connected to the second transducer. When the first driver is operating, the first driver drives the first transducer to emit ultrasonic waves; when the second driver is operating, the second driver drives the second transducer to emit ultrasonic waves.

[0014] Optionally, the sound wave travel measurement device further includes a first start gate and a second start gate; Both the first driver and the second driver are electrically connected to the first start gantler. The first start gantler is electrically connected to the second start gantler. The pulse generator is electrically connected to the second start gantler. The second start gantler is electrically connected to the time measurement component. The second start gantler is used to select its first branch to connect the first start gantler and the time measurement component, and to disconnect its second branch to disconnect the pulse generator and the time measurement component. Alternatively, the second start gantler is used to select its second branch to connect the pulse generator and the time measurement component, and to disconnect its first branch to disconnect the first start gantler and the time measurement component.

[0015] In the embodiments of this application, the pulse generator, transducer assembly, comparator assembly, gating assembly, and time measurement assembly are all electrically connected to the control assembly. Therefore, the control assembly can control the pulse generator, transducer assembly, comparator assembly, gating assembly, and time measurement assembly, and the time measurement assembly can send the measurement results to the control assembly. In addition, the pulse generator is electrically connected to the transducer assembly, the transducer assembly is electrically connected to the comparator assembly, the comparator assembly is electrically connected to the gating assembly, and the gating assembly is electrically connected to the time measurement assembly. Therefore, once the pulse generator generates an initial pulse group, the initial pulse group can be transmitted to the transducer assembly. After receiving the initial pulse group, the transducer assembly can be excited to generate an acoustic wave group. When the transducer assembly receives the acoustic wave group, it will generate a response voltage wave group, which can be transmitted to the comparator assembly. After receiving the response voltage wave group, the comparator assembly can compare and output a comparison pulse to the gating assembly. The essence of the comparison pulse is to convert the sinusoidal wave of the response voltage wave group into a rectangular pulse that can be measured, which allows the gating assembly to be in different modes, that is, to be in different gating modes. In this way, the comparison pulse is transmitted to the time measurement assembly in different gating modes of the gating assembly, so that the time measurement assembly measures the time of flight in different modes. Specifically, when the selector component is in the first mode, the acoustic wave transit time measuring device measures the acoustic wave transit time according to the first measurement mode, that is, the time measuring component transmits the comparison pulse signal to the time measuring component according to the selector component being in the first mode to measure the transit time; when the selector component is in the second mode, the acoustic wave transit time measuring device measures the acoustic wave transit time according to the second measurement mode, that is, the time measuring component transmits the comparison pulse signal to the time measuring component according to the selector component being in the second mode to measure the transit time. In other words, in this embodiment, by setting a pulse generator, transducer assembly, comparator assembly, selector assembly, and time measurement assembly, the selector assembly can be in either a first mode or a second mode. This allows the time measurement assembly to transmit a comparison pulse signal to the time measurement assembly when the selector assembly is in the first mode to measure the transit time, or vice versa when the selector assembly is in the second mode. This enables the measuring device to measure the transit time in both modes, and the transit times measured in the two modes can be mutually verified. In other words, the measuring device provided in this embodiment can have two modes, thus diversifying the measurement modes, and the transit times measured in the two modes can be mutually verified, thereby enabling online verification of the measurement results during online operation of the device. Attached Figure Description

[0016] Figure 1 This is a schematic diagram showing a comparator assembly in a measuring device provided in an embodiment of this application, which includes two comparators; Figure 2 This is a schematic diagram showing a comparator assembly in a measuring device provided in an embodiment of this application, which includes three comparators; Figure 3 This diagram illustrates an OR gate in a measuring device provided in an embodiment of this application. Figure 4 This diagram illustrates an external selector in a measuring device provided in an embodiment of this application.

[0017] Figure label: 10: Pulse generator; 11: First pulse generating element; 12: Second pulse generating element; 20: Transducer assembly; 21: First transducer; 22: Second transducer; 30: Comparator assembly; 31: First comparator; 32: Second comparator; 33: Third comparator; 34: Fourth comparator; 35: Fifth comparator; 36: Sixth comparator; 40: Gantler assembly; 41: First gantler; 42: Second gantler; 43: Third gantler ; 44: Fourth selector; 50: Time measurement component; 51: First time measurement element; 52: Second time measurement element; 60: Control component; 61: Controller; 62: Integrated control module; 70: OR gate; 80: External selector; 90: Echo selector; 100: First driver; 110: Second driver; 120: First start selector; 130: Second start selector; 140: Reference voltage generation module; 150: Measurement tube. Detailed Implementation

[0018] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0019] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0020] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0021] like Figures 1 to 4 As shown, the device for measuring the time of flight of the sound wave includes: a pulse generator 10, a transducer assembly 20, a comparator assembly 30, a gate assembly 40, a time measurement assembly 50, and a control assembly 60.

[0022] The pulse generator 10 is electrically connected to the transducer assembly 20, the transducer assembly 20 is electrically connected to the comparator assembly 30, the comparator assembly 30 is electrically connected to the selector assembly 40, and the selector assembly 40 is electrically connected to the time measurement assembly 50. The pulse generator 10, the transducer assembly 20, the comparator assembly 30, the selector assembly 40, and the time measurement assembly 50 are all electrically connected to the control assembly 60. The selector assembly 40 includes a first mode and a second mode. When the selector assembly 40 is in the first mode, the sound wave transit time measuring device measures the sound wave transit time according to the first measurement mode. When the selector assembly 40 is in the second mode, the sound wave transit time measuring device measures the sound wave transit time according to the second measurement mode.

[0023] In this embodiment, the pulse generator 10, transducer assembly 20, comparator assembly 30, selector assembly 40, and time measurement assembly 50 are all electrically connected to the control assembly 60. Therefore, the control assembly 60 can control the pulse generator 10, transducer assembly 20, comparator assembly 30, selector assembly 40, and time measurement assembly 50, and the time measurement assembly 50 can send the measurement results to the control assembly 60. Furthermore, the pulse generator 10 is electrically connected to the transducer assembly 20, the transducer assembly 20 is electrically connected to the comparator assembly 30, the comparator assembly 30 is electrically connected to the selector assembly 40, and the selector assembly 40 is electrically connected to the time measurement assembly 50. Therefore, once the pulse generator 10 generates an initial pulse group, the initial pulse group can be transmitted to the transducer assembly 20. After receiving the initial pulse group, the transducer assembly 20 can be excited to generate an acoustic wave group, and upon receiving the acoustic wave group, the transducer assembly 20 generates a response voltage wave group in response to the acoustic wave group. The voltage wave group can then be transmitted to the comparator component 30. After receiving the response voltage wave group, the comparator component 30 can compare it and output a comparison pulse to the selector component 40. The essence of the comparison pulse is to convert the sinusoidal wave of the response voltage wave group into a rectangular pulse that can be measured, which allows the selector component 40 to be in different modes, that is, to be in different selection modes. In turn, the comparison pulse is transmitted to the time measurement component 50 in different selection modes of the selector component 40, so that the time measurement component 50 measures the time of flight in different modes. Specifically, when the selector assembly 40 is in the first mode, the sound wave transit time measuring device measures the sound wave transit time according to the first measurement mode, that is, the time measuring assembly 50 transmits the comparison pulse signal to the time measuring assembly 50 according to the selector assembly 40 being in the first mode to measure the transit time; when the selector assembly 40 is in the second mode, the sound wave transit time measuring device measures the sound wave transit time according to the second measurement mode, that is, the time measuring assembly 50 transmits the comparison pulse signal to the time measuring assembly 50 according to the selector assembly 40 being in the second mode to measure the transit time. That is, in this embodiment of the application, by setting a pulse generator 10, a transducer assembly 20, a comparator assembly 30, a selector assembly 40, and a time measurement assembly 50, the selector assembly 40 can be in a first mode or a second mode. This allows the time measurement assembly 50 to transmit a comparison pulse signal to the selector assembly 40 in the first mode to measure the transit time, or to transmit a comparison pulse signal to the selector assembly 40 in the second mode to measure the transit time. Thus, the measuring device can measure the transit time in both modes, and the transit times measured by the measuring device in the two modes can be mutually verified.That is, the measuring device provided in this application embodiment can have two modes, thereby diversifying the modes of the measuring device, and the flight time measured by the two modes can be mutually verified, thereby realizing online verification of the measurement results of the measuring device during the online operation of the equipment.

[0024] It should be noted that, in this embodiment of the application, the time measurement component 50 first performs a precise time measurement, and then the time measurement component 50 sends the measured value of the precise time measurement to the control component 60. The control component 60 determines the sound wave transit time based on the measured value of the precise time measurement, or the time measurement component 50 itself determines the sound wave transit time based on the measured value of the precise time measurement.

[0025] It should be noted that, in the embodiments of this application, as Figure 1 As shown, the control component 60 may include an integrated control module 62 and a controller 61. The controller 61 may be a host computer or a central processing unit. The integrated control module 62 is connected to a bus interface, and the bus interface is connected to the controller 61, thus forming the control component 60. The controller 61 can send commands to the integrated control module 62 through the bus interface. The integrated control module 62 can control other components. Conversely, other components can also be connected to the bus interface via a bus, allowing the controller 61 to directly control them. These other components refer to those electrically connected to and controlled by the control component 60. For example, other components may include a pulse generator 10.

[0026] Furthermore, in this embodiment, after the pulse generator 10 generates an initial pulse group, the initial pulse group is transmitted to the transducer assembly 20, which can excite the transducer assembly 20 to generate an acoustic wave group. The transducer assembly 20, which is not driven by the pulse generator 10, receives the acoustic wave group and generates a response voltage wave group. The response voltage wave group is a mechanical wave, typically a sinusoidal wave. In this process, the initial pulse group is transmitted to the transducer assembly 20, the transducer assembly 20 generates and emits an acoustic wave group, and the acoustic wave group is transmitted to the transducer assembly 20, causing the transducer assembly 20, which is not driven by the pulse generator 10, to generate a response voltage wave group.

[0027] Additionally, in some embodiments, such as Figure 1As shown, the comparator assembly 30 includes a first comparator 31 and a second comparator 32, the selector assembly 40 includes a first selector 41, and the time measurement assembly 50 includes a first time measurement element 51 and a second time measurement element 52. Both the first comparator 31 and the second comparator 32 are electrically connected to the transducer assembly 20, and both are electrically connected to the first selector 41. The first selector 41 is electrically connected to the first time measurement element 51, and the second comparator 32 is electrically connected to the second time measurement element 52. When the selector assembly 40 is in a first mode, the first selector 41 selects its first branch to conduct the first comparator 31 and the first time measurement element 52. When the time measuring element 51 is in the second mode, the first selector 41 disconnects its second branch to disconnect the second comparator 32 from the first time measuring element 51, so that the first comparator 31 transmits a signal to the first time measuring element 51 and the second comparator 32 transmits a signal to the second time measuring element 52; when the selector assembly 40 is in the second mode, the first selector 41 selects its second branch to conduct the second comparator 32 from the first time measuring element 51, and the first selector 41 disconnects its first branch to disconnect the first comparator 31 from the first time measuring element 51, so that the second comparator 32 transmits a signal to the first time measuring element 51 and the second time measuring element 52.

[0028] Since both the first comparator 31 and the second comparator 32 are electrically connected to the transducer assembly 20, once the transducer assembly 20 generates a response voltage waveform, the response voltage waveform can be transmitted to the first comparator 31 and the second comparator 32. Since both the first comparator 31 and the second comparator 32 are electrically connected to the first selector 41, which is electrically connected to the first time measurement element 51, and the second comparator 32 is electrically connected to the second time measurement element 52, the response voltage waveform can be transmitted to both the first comparator 31 and the second comparator 32. The first comparator 31 generates a comparison pulse, and the second comparator 32 generates a comparison pulse. This allows the branches in the first selector 41 to be in different states, thereby enabling the comparison pulse of the first comparator 31 to be transmitted to the first time measurement element 51 through the first selector 41 or to abort transmission to the first time measurement element 51, and enabling the comparison pulse of the second comparator 32 to be transmitted to the first time measurement element 51 through the first selector 41 or to abort transmission to the first time measurement element 51. Specifically, when the selector assembly 40 is in the first mode, the first selector 41 selects its first branch, enabling the first comparator 31 to conduct with the first time measuring element 51, and the first selector 41 disconnects its second branch, disconnecting the second comparator 32 from the first time measuring element 51. Thus, the comparison pulse of the first comparator 31 can be transmitted to the first time measuring element 51 through the first branch of the first selector 41, allowing the first time measuring element 51 to measure precise time. Simultaneously, the comparison pulse of the second comparator 32 is transmitted to the second time measuring element 52, enabling the second time measuring element 52 to measure precise time. This is equivalent to the measuring device using dual comparators to perform precise time measurements to determine the sound wave travel time. When the selector assembly 40 is in the second mode... In this case, the first selector 41 selects its second branch, enabling the second comparator 32 to conduct with the first time measuring element 51. Conversely, the first selector 41 disconnects its first branch, disconnecting the first comparator 31 from the first time measuring element 51. The comparison pulse of the first comparator 31 cannot be transmitted to the first time measuring element 51 through the first selector 41, while the comparison pulse of the second comparator 32 can be transmitted to the first time measuring element 51 through the second branch of the first selector 41, allowing the first time measuring element 51 to measure precise time. The comparison pulse of the second comparator 32 is also transmitted to the second time measuring element 52, enabling the second time measuring element 52 to measure precise time. This is equivalent to the measuring device using a single comparator for precise time measurement to determine the sound wave transit time. In other words, by setting the first comparator 31, the second comparator 32, and the first selector 41, the measuring device can perform transit time measurement using a single comparator or dual comparators, allowing the transit times obtained from the two modes to be mutually verified.

[0029] It should be noted that the first selector 41 has a first branch and a second branch. The first branch can be electrically connected to the first comparator 31 and the first time measuring element 51, and the second branch can be electrically connected to the second comparator 32 and the first time measuring element 51. Thus, when the first branch is on and the second branch is off, the comparison pulse of the first comparator 31 can be transmitted to the first time measuring element 51 through the first branch, while the comparison pulse of the second comparator 32 cannot be transmitted to the first time measuring element 51. When the second branch is on and the first branch is off, the comparison pulse of the second comparator 32 can be transmitted to the first time measuring element 51 through the second branch, while the comparison pulse of the first comparator 31 cannot be transmitted to the first time measuring element 51.

[0030] Additionally, in some embodiments, such as Figure 2 As shown, the comparator assembly 30 includes a third comparator 33, a fourth comparator 34, and a fifth comparator 35; the selector assembly 40 includes a second selector 42 and a third selector 43; and the time measurement assembly 50 includes a first time measurement element 51 and a second time measurement element 52. The third comparator 33, fourth comparator 34, and fifth comparator 35 are all electrically connected to the transducer assembly 20. The third comparator 33 is electrically connected to the second selector 42, the second selector 42 is electrically connected to the first time measurement element 51, the fourth comparator 34 is electrically connected to the third selector 43, the third selector 43 is electrically connected to the second time measurement element 52, and the fifth comparator 35 is electrically connected to both the second selector 42 and the third selector 43. When the selector assembly 40 is in the first mode, the second selector 42 selects its first branch to connect the third comparator 33 to the first time measurement element 51, and the second selector 42 is disconnected. The second branch of the third selector 43 is opened to disconnect the fifth comparator 35 from the first time measurement element 51. The first branch of the third selector 43 is opened to connect the fourth comparator 34 to the second time measurement element 52. The second branch of the third selector 43 is also opened to disconnect the fifth comparator 35 from the second time measurement element 52, so that the third comparator 33 transmits a signal to the first time measurement element 51 and the fourth comparator 34 transmits a signal to the second time measurement element 52. When the selector assembly 40 is in the second mode, the second selector 42 connects the fifth comparator 35 to the first time measurement element 51 and disconnects the third comparator 33 from the first time measurement element 51. The third selector 43 connects the fifth comparator 35 to the second time measurement element 52 and disconnects the fourth comparator 34 from the second time measurement element 52, so that the fifth comparator 35 transmits a signal to both the first time measurement element 51 and the second time measurement element 52.

[0031] Since the third comparator 33, the fourth comparator 34, and the fifth comparator 35 are all electrically connected to the transducer assembly 20, once the transducer assembly 20 generates a response voltage group, the response voltage group can be transmitted to the third comparator 33, the fourth comparator 34, and the fifth comparator 35. Because the third comparator 33 is electrically connected to the second selector 42, the second selector 42 is electrically connected to the first time measuring element 51, the fourth comparator 34 is electrically connected to the third selector 43, the third selector 43 is electrically connected to the second time measuring element 52, and the fifth comparator 35 is electrically connected to both the second selector 42 and the third selector 43, the response voltage group can be transmitted to the third comparator 33, the fourth comparator 34, and the fifth comparator 35. Each of these comparators generates a comparison pulse, which causes the second selector 42, the third selector 44, and the fifth comparator 35 to generate a comparison pulse. The comparator 43 and the fourth selector branch are in different states, so that the comparison pulse of the third comparator 33 is transmitted to the first time measurement element 51 through the second selector 42 or the transmission to the first time measurement element 51 is stopped, the comparison pulse of the fourth comparator 34 is transmitted to the second time measurement element 52 through the third selector 43 or the transmission to the second time measurement element 52 is stopped, the comparison pulse of the fifth comparator 35 is transmitted to the first time measurement element 51 through the second selector 42, and the comparison pulse of the fifth comparator 35 is transmitted to the second time measurement element 52 through the third selector 43.Specifically, when the selector assembly 40 is in the first mode, the second selector 42 selects its first branch to connect the third comparator 33 and the first time measuring element 51, and disconnects its second branch to disconnect the fifth comparator 35 and the first time measuring element 51. The third selector 43 selects its first branch to connect the fourth comparator 34 and the second time measuring element 52, and disconnects its second branch to disconnect the fifth comparator 35 and the second time measuring element 52. Thus, the comparison pulse of the third comparator 33 can be transmitted to the first time measuring element 51 through the first branch of the second selector 42, allowing the first time measuring element 51 to measure the time of travel. The comparison pulse of the fourth comparator 34 is transmitted to the second time measuring element 52 through the first branch of the third selector 43, allowing the second time measuring element 52 to measure the precise time. The measuring device uses dual comparators for precise time measurement to determine the sound wave transit time. When the selector assembly 40 is in the second mode, the second selector 42 connects the fifth comparator 35 and the first time measuring element 51, and disconnects the third comparator 33 from the first time measuring element 51. The third selector 43 connects the fifth comparator 35 and the second time measuring element 52, and disconnects the fourth comparator 34 from the second time measuring element 52. Thus, the comparison pulse of the fifth comparator 35 is transmitted to the first time measuring element 51 through the second branch of the second selector 42, causing the first time measuring element 51 to measure the transit time. The comparison pulse of the fifth comparator 35 is transmitted to the second time measuring element 52 through the second branch of the third selector 43, causing the second time measuring element 52 to measure the precise time. This is equivalent to the measuring device using a single comparator for precise time measurement to determine the sound wave transit time. That is, by setting the third comparator 33, the fourth comparator 34, the fifth comparator 35, the second selector 42 and the third selector 43, the measuring device can measure the flight time by a single comparator or by a dual comparator, so that the flight time of the two measurements can be mutually verified.

[0032] It should be noted that the second selector 42 has a first branch and a second branch. The first branch can be electrically connected to the third comparator 33 and the first time measuring element 51, and the second branch can be electrically connected to the fifth comparator 35 and the first time measuring element 51. Thus, when the first branch is on and the second branch is off, the comparison pulse of the third comparator 33 can be transmitted to the first time measuring element 51 through the first branch, while the comparison pulse of the fifth comparator 35 cannot be transmitted to the first time measuring element 51. When the second branch is on and the first branch is off, the comparison pulse of the fifth comparator 35 can be transmitted to the first time measuring element 51 through the second branch, while the comparison pulse of the third comparator 33 cannot be transmitted to the first time measuring element 51. Similarly, the third selector 43 has a first branch and a second branch. The first branch can be electrically connected to the fourth comparator 34 and the second time measuring element 52, and the second branch can be electrically connected to the fifth comparator 35 and the second time measuring element 52. Thus, when the first branch is on and the second branch is off, the comparison pulse of the fourth comparator 34 can be transmitted to the second time measuring element 52 through the first branch, while the comparison pulse of the fifth comparator 35 cannot be transmitted to the second time measuring element 52. When the second branch is on and the first branch is off, the comparison pulse of the fifth comparator 35 can be transmitted to the second time measuring element 52 through the second branch, while the comparison pulse of the fourth comparator 34 cannot be transmitted to the second time measuring element 52.

[0033] Additionally, in some embodiments, such as Figure 3 or Figure 4As shown, comparator assembly 30 includes a sixth comparator 36, selector assembly 40 includes a fourth selector 44, and time measurement assembly 50 includes a first time measurement element 51 and a second time measurement element 52. The sixth comparator 36 is electrically connected to transducer assembly 20, and the sixth comparator 36 is electrically connected to the fourth selector 44. The fourth selector 44 is electrically connected to transducer assembly 20, and the fourth selector 44 is electrically connected to both the first time measurement element 51 and the second time measurement element 52. When selector assembly 40 is in a first mode, the fourth selector 44 selects its first branch to connect the sixth comparator 36 to both the first time measurement element 51 and the second time measurement element 52. The selector 44 disconnects its second branch to disconnect the transducer from the first time measurement element 51 and the second time measurement element 52, so that the sixth comparator 36 transmits a signal to the first time measurement element 51 and the second time measurement element 52; when the selector assembly 40 is in the second mode, the fourth selector 44 selects its second branch to connect the transducer assembly 20 to the first time measurement element 51 and the second time measurement element 52, and the fourth selector 44 disconnects its first branch to disconnect the sixth comparator 36 from the first time measurement element 51 and the second time measurement element 52, so that the transducer assembly 20 transmits a signal to the first time measurement element 51 and the second time measurement element 52.

[0034] Since the sixth comparator 36 and the fourth selector 44 are electrically connected to the transducer assembly 20, once the transducer assembly 20 generates a response voltage group, the response voltage group can be transmitted to the sixth comparator 36 and the fourth selector 44. Because the sixth comparator 36 and the fourth selector 44 are electrically connected, and the fourth selector 44 is electrically connected to the first time measurement element 51 and the second time measurement element 52 respectively, the comparison pulse of the sixth comparator 36 can be transmitted to the fourth selector 44, and the response voltage group can be transmitted to the fourth selector 44. This allows the branches in the fourth selector 44 to be in different states, enabling the comparison pulse of the sixth comparator 36 to be transmitted to the first time measurement element 51 and the second time measurement element 52, or enabling the response voltage group to be transmitted to the first time measurement element 51 and the second time measurement element 52 through the fourth selector 44. Specifically, when the selector assembly 40 is in the first mode, the fourth selector 44 selects its first branch to connect the sixth comparator 36 with the first time measurement element 51 and the second time measurement element 52, and the fourth selector 44 disconnects its second branch to disconnect the transducer from the first time measurement element 51 and the second time measurement element 52. Thus, the comparison pulse of the sixth comparator 36 can be transmitted to the first time measurement element 51 and the second time measurement element 52 through the first branch of the fourth selector 44, so that the first time measurement element 51 and the second time measurement element 52 can perform precise time measurement to determine the sound wave travel time. When the selector assembly 40 is in the second mode, the fourth selector 44 selects its second branch to connect the transducer assembly 20 with the first time measurement element 51 and the second time measurement element 52. Simultaneously, the fourth selector 44 disconnects its first branch to disconnect the sixth comparator 36 from the first and second time measurement elements 51 and 52. This allows the response voltage waveform generated by the transducer assembly 20 to be transmitted to the first and second time measurement elements 51 and 52 via the second branch of the fourth selector 44, enabling each element to perform precise time measurements to determine the acoustic wave transit time. In other words, by configuring the sixth comparator 36 and the fourth selector 44, the measuring device can measure the acoustic wave transit time using both the comparison pulse from the sixth comparator 36 and the response voltage waveform from the transducer assembly 20, thus allowing the acoustic wave transit times obtained from the two measurements to be mutually verified.

[0035] It should be noted that both the first time measuring element 51 and the second time measuring element 52 have built-in comparators. When the measuring device is in the second mode, the response voltage group of the transducer assembly 20 is transmitted to the first time measuring element 51 and the second time measuring element 52 through the second branch of the fourth selector 44. The built-in comparators in the first time measuring element 51 and the second time measuring element 52 can be compared and generate comparison pulses, so that the first time measuring element 51 and the second time measuring element 52 can accurately measure the time to determine the sound wave transit time.

[0036] In addition, in this embodiment, the fourth selector 44 has a first branch and a second branch. The first branch is electrically connected to the sixth comparator 36 and the first time measurement element 51 and the second time measurement element 52, respectively. The second branch is electrically connected to the transducer assembly 20 and the first time measurement element 51 and the second time measurement element 52, respectively. Thus, when the first branch is on and the second branch is off, the comparison pulse of the sixth comparator 36 can be transmitted to the first time measurement element 51 and the second time measurement element 52 through the first branch, while the response voltage group of the transducer assembly 20 cannot be transmitted to the first time measurement element 51 and the second time measurement element 52. When the second branch is on and the first branch is off, the response voltage group of the transducer assembly 20 can be transmitted to the first time measurement element 51 and the second time measurement element 52 through the second branch, while the comparison pulse of the sixth comparator 36 cannot be transmitted to the first time measurement element 51 and the second time measurement element 52.

[0037] Additionally, in some embodiments, such as Figure 3 or Figure 4 As shown, the pulse generator 10 includes a first pulse generating element 11 and a second pulse generating element 12. Both the first pulse generating element 11 and the second pulse generating element 12 are electrically connected to the transducer assembly 20. The first pulse generating element 11 and the first time measuring element 51 are integrated into one unit, and the second pulse generating element 12 and the second time measuring element 52 are integrated into one unit. This arrangement is equivalent to integrating the first pulse generating element 11 with the first time measuring element 51 and integrating the second pulse generating element 12 with the second time measuring element 52, thereby facilitating further connection and assembly of the two integrated modules to form a sound wave transit time measurement device capable of dual-mode measurement.

[0038] It should be noted that the first pulse generating element 11 and the first time measuring element 51 can be integrated into the same chip, and the second pulse generating element 12 and the second time measuring element 52 can be integrated into the same chip, so that the first pulse generating element 11 and the first time measuring element 51 are integrated into one structure, and the second pulse generating element 12 and the second time measuring element 52 are integrated into one structure.

[0039] Additionally, in some embodiments, such as Figure 3 As shown, the sound wave transit time measurement device also includes an OR gate 70; the OR gate 70 is electrically connected to the pulse generator 10, the first time measuring element 51, and the second time measuring element 52. The output terminal of the OR gate 70 is electrically connected to the first time measuring element 51 and the second time measuring element 52, the first input terminal of the OR gate 70 is electrically connected to the first output terminal of the first pulse generating element 11, and the second input terminal of the OR gate 70 is electrically connected to the second output terminal of the first pulse generating element 11. The transducer assembly 20 is electrically connected to the OR gate 70.

[0040] Since OR gate 70 is electrically connected to both the first time measuring element 51 and the second time measuring element 52, and also electrically connected to the first pulse generating element 11, and since the first pulse generating element 11 and the first time measuring element 51 are integrated, and the second pulse generating element 12 and the second time measuring element 52 are also integrated, once the first pulse generating element 11 emits a high-level pulse signal through its first output terminal, the pulse signal can be transmitted to OR gate 70. Due to the characteristic of OR gate to transmit high levels, the high-level pulse signal emitted by the first pulse generating element 11 is transmitted through the first branch of OR gate 70 to the integrated structure formed by the second time measuring element 52 and the second pulse generating element 12, and the integrated structure formed by the first time measuring element 51 and the first pulse generating element 11, so that the second time measuring element 52 and the first time measuring element 51 can start measuring simultaneously. Once the first pulse generating element 11 emits a high-level pulse signal through its second output terminal, the pulse signal can be transmitted to the OR gate 70. Due to the characteristic of the OR gate to transmit high levels, the high-level pulse signal emitted by the first pulse generating element 11 is transmitted through the second branch of the OR gate 70 to the integrated structure formed by the second time measuring element 52 and the second pulse generating element 12, and the integrated structure formed by the first time measuring element 51 and the first pulse generating element 11, so that the second time measuring element 52 and the first time measuring element 51 can start measuring simultaneously.

[0041] It should be noted that the first input terminal and the output terminal of OR gate 70 constitute its first branch, and the second input terminal and the output terminal of OR gate 70 constitute its second branch. The first output terminal of the first pulse generating element 11 is electrically connected to the first input terminal of OR gate 70, the second output terminal of the first pulse generating element 11 is electrically connected to the second input terminal of OR gate 70, and the output terminal of OR gate 70 is electrically connected to the first time measuring element 51 and the second time measuring element 52.

[0042] Additionally, in some embodiments, such as Figure 4 As shown, the sound wave transit time measurement device also includes an external selector 80; the external selector 80 is electrically connected to the pulse generator 10, the first time measuring element 51, and the second time measuring element 52. Specifically, the output terminal of the external selector 80 is electrically connected to the first time measuring element 51 and the second time measuring element 52, the first input terminal of the external selector 80 is electrically connected to the first output terminal of the first pulse generating element 11, and the second input terminal of the external selector 80 is electrically connected to the second output terminal of the first pulse generating element 11. The transducer assembly 20 is electrically connected to the external selector 80.

[0043] Since the external selector 80 is electrically connected to both the first time measuring element 51 and the second time measuring element 52, and is also electrically connected to the first pulse generating element 11, and the first pulse generating element 11 and the first time measuring element 51 are integrated, and the second pulse generating element 12 and the second time measuring element 52 are also integrated, once the first pulse generating element 11 emits a high-level pulse signal through its first output terminal, the pulse signal can be transmitted to the external selector 80. The high-level pulse signal emitted by the first pulse generating element 11 is transmitted through the first branch of the external selector 80 to the integrated structure formed by the second time measuring element 52 and the second pulse generating element 12, and the integrated structure formed by the first time measuring element 51 and the first pulse generating element 11, so that the second time measuring element 52 and the first time measuring element 51 can start measuring simultaneously. Once the first pulse generating element 11 emits a high-level pulse signal through its second output terminal, the pulse signal can be transmitted to the external selector 80. The high-level pulse signal emitted by the first pulse generating element 11 is transmitted through the second branch of the external selector 80 to the integrated structure formed by the second time measuring element 52 and the second pulse generating element 12, and the integrated structure formed by the first time measuring element 51 and the first pulse generating element 11, so that the second time measuring element 52 and the first time measuring element 51 can start measuring simultaneously.

[0044] It should be noted that the first input terminal and the output terminal of the external selector 80 constitute its first branch, and the second input terminal and the output terminal of the external selector 80 constitute its second branch. The first output terminal of the first pulse generating element 11 is electrically connected to the first input terminal of the external selector 80, the second output terminal of the first pulse generating element 11 is electrically connected to the second input terminal of the external selector 80, and the output terminal of the external selector 80 is electrically connected to the first time measuring element 51 and the second time measuring element 52.

[0045] Additionally, in some embodiments, such as Figure 1 As shown, the sound wave transit time measurement device also includes an echo selector 90; the transducer assembly 20 is electrically connected to the comparator assembly 30 via the echo selector 90. The transducer assembly 20 includes at least two transducers. With this configuration, once different transducers in the transducer assembly 20 generate response voltage waveforms, the branch connected to the transducer generating the response voltage waveform in the echo selector 90 can be made conductive, thereby allowing the response voltage waveform to be transmitted to the comparator assembly 30. In other words, by setting the echo selector 90, it can be ensured that the response voltage waveform generated by the transducer assembly 20 is transmitted to the comparator assembly 30.

[0046] Additionally, in some embodiments, such as Figure 1 As shown, the transducer assembly 20 includes a first transducer 21 and a second transducer 22; both the first transducer 21 and the second transducer 22 are electrically connected to the pulse generator 10, and both the first transducer 21 and the second transducer 22 are electrically connected to the echo selector 90; when the first transducer 21 emits ultrasonic waves, the second transducer 22 receives ultrasonic waves, and the echo selector 90 connects the second transducer 22 to the comparator assembly 30; when the second transducer 22 emits ultrasonic waves, the first transducer 21 receives ultrasonic waves, and the echo selector 90 connects the first transducer 21 to the comparator assembly 30.

[0047] Since both the first transducer 21 and the second transducer 22 are electrically connected to the pulse generator 10, and both are electrically connected to the echo selector 90, when the first transducer 21 emits ultrasonic waves, it acts as an excitation transducer, and the second transducer 22 receives the ultrasonic waves, acting as a response transducer. The second transducer 22 generates a response voltage group, causing the first branch of the echo selector 90 to disconnect and the second branch to connect, thus connecting the second transducer 22 to the comparator assembly 30, thereby causing the second transducer 22 to generate... The response voltage waveform is transmitted to the comparator assembly 30 through the second branch of the echo selector 90. When the second transducer 22 emits ultrasonic waves, it acts as an excitation transducer, and the first transducer 21 receives the ultrasonic waves, acting as a response transducer. The first transducer 21 generates a response voltage waveform, and the second branch of the echo selector 90 is disconnected, while the first branch of the echo selector 90 is connected, making the first transducer 21 connected to the comparator assembly 30. This allows the response voltage waveform generated by the first transducer 21 to be transmitted to the comparator assembly 30 through the first branch of the echo selector 90. In other words, by electrically connecting both the first transducer 21 and the second transducer 22 to the pulse generator 10 and both to the echo selector 90, the transmission of the response voltage waveform to the comparator assembly 30 can be ensured.

[0048] It should be noted that the echo selector 90 has a first branch and a second branch. The first branch is connected to the first transducer 21 and the comparator assembly 30, respectively. The second branch is connected to the second transducer 22 and the comparator assembly 30, respectively. Thus, when the first branch is turned on, the first transducer 21 and the comparator assembly 30 are turned on. When the second branch is turned on, the second transducer 22 and the comparator assembly 30 are turned on.

[0049] Additionally, in some embodiments, such as Figure 1As shown, the sound wave transit time measurement device also includes a first driver 100 and a second driver 110; both the first driver 100 and the second driver 110 are electrically connected to the pulse generator 10, the first driver 100 is electrically connected to the first transducer 21, and the second driver 110 is electrically connected to the second transducer 22; when the first driver 100 is running, the first driver 100 drives the first transducer 21 to emit ultrasonic waves; when the second driver 110 is running, the second driver 110 drives the second transducer 22 to emit ultrasonic waves. With this configuration, either the first driver 100 or the second driver 110 can be operated as needed. When the first driver 100 is operating and the second driver 110 is not operating, the first driver 100 drives the first transducer 21 to generate an ultrasonic wave cluster. In this case, the first transducer 21 acts as an excitation transducer, and the second transducer 22 acts as a response transducer. When the second driver 110 is operating and the first driver 100 is not operating, the second driver 110 drives the second transducer 22 to generate an ultrasonic wave cluster. In this case, the second transducer 22 acts as an excitation transducer, and the first transducer 21 acts as a response transducer. In other words, by configuring the first driver 100 and the second driver 110, it is easy to determine which transducer, the first transducer 21 or the second transducer 22, should act as the excitation transducer and which should act as the response transducer.

[0050] Additionally, in some embodiments, such as Figure 1 or Figure 2 As shown, the sound wave traversal measurement device also includes a first start selector 120 and a second start selector 130; the first driver 100 and the second driver 110 are both electrically connected to the first start selector 120, the first start selector 120 is electrically connected to the second start selector 130, the pulse generator 10 is electrically connected to the second start selector 130, and the second start selector 130 is electrically connected to the time measurement component 50. The second start selector 130 is used to select its first branch to connect the first start selector 120 and the time measurement component 50, and to disconnect its second branch to disconnect the pulse generator 10 and the time measurement component 50; or the second start selector 130 is used to select its second branch to connect the pulse generator 10 and the time measurement component 50, and to disconnect its first branch to disconnect the first start selector 120 and the time measurement component 50.

[0051] Since both the first driver 100 and the second driver 110 are electrically connected to the first start selector 120, and the first start selector 120 is electrically connected to the first input terminal of the second start selector 130, the first input terminal to the output terminal of the second start selector 130 constitutes its first branch. The pulse generator 10 is electrically connected to the second input terminal of the second start selector 130, and the second input terminal to the output terminal of the second start selector 130 constitutes its second branch. Therefore, the source of the measurement start trigger signal received by the time measurement component 50 can be controlled by controlling the on / off state of the first and second branches of the second start selector 130. Specifically, when the first branch of the second start selector 130 is on, the second branch... When disconnected, the first start selector 120 can be connected to the time measurement component 50 through the first branch, and the pulse generator 10 is disconnected from the time measurement component 50. At this time, the measurement start trigger signal received by the time measurement component 50 comes from the output of the first start selector 120, thereby controlling whether the measurement start trigger signal received by the time measurement component 50 comes from the first driver 100 or the second driver 110. When the second branch of the second start selector 130 is connected and the first branch is disconnected, the pulse generator 10 can be connected to the time measurement component 50 through the second branch, and the first start selector 120 is disconnected from the time measurement component 50. At this time, the measurement start trigger signal received by the time measurement component 50 comes from the pulse generator 10. That is, by setting the first start selector 120 and the second start selector 130, it is easy to determine from which specific component the signal received by the time measurement component 50 comes from.

[0052] Additionally, in some embodiments, such as Figure 1 As shown, the measuring device also includes a reference voltage generation module 140; the reference voltage generation module 140 is electrically connected to the control component 60 and the comparator component 30 respectively, and the reference voltage generation module 140 is used to provide a comparison reference voltage to the comparator component 30, wherein the comparison reference voltage is a voltage greater than or equal to the zero-crossing voltage value.

[0053] By setting up the reference voltage generation module 140, the control component 60 can control the reference voltage generation module 140 to provide a comparison reference voltage to the comparator component 30. The comparator component 30 has a comparison reference terminal, and the reference voltage generation module 140 can be electrically connected to the comparison reference terminal. Once the reference voltage generation module 140 generates the comparison reference voltage, the comparison reference voltage can be transmitted to the comparison reference terminal. When the peak-to-peak voltage of the response voltage group transmitted to the input signal terminal of the comparator component 30 is higher than the voltage at the comparison reference terminal, the comparator component 30 will output a high-level comparison pulse. That is, by setting up the reference voltage generation module 140, the comparator component 30 can easily compare the voltage at its input signal terminal with the voltage at the comparison reference terminal to determine whether to output a comparison pulse.

[0054] It should be noted that the zero-crossing voltage value refers to the voltage value at the position where the positive and negative waves of the response voltage wave change.

[0055] Additionally, in the embodiments of this application, such as Figure 1 As shown, the device for measuring the time of flight of a sound wave may further include a measuring tube 150; an excitation transducer is disposed at the first end of the measuring tube 150, and a response transducer is disposed at the second end of the measuring tube 150. The measuring tube 150 may be filled with fluid.

[0056] With this setup, after the excitation transducer emits a sound wave, the sound wave travels through the fluid in the measuring tube 150. Then, the response transducer can receive the sound wave and generate a response voltage wave group. With the sound wave travel time measuring device in this embodiment, the travel time of the sound wave can be accurately determined, and thus the flow velocity of the fluid in the measuring tube 150 can be accurately determined, thereby more accurately determining parameters such as flow rate.

[0057] It should be noted that when the sound wave transit time measuring device includes a measuring tube 150, the flow velocity of the fluid in the measuring tube 150 can be accurately determined, and parameters such as flow rate can be determined more accurately. Thus, the measuring device provided in this application embodiment can be applied to a water meter or a gas meter, and the flow velocity and flow rate of tap water or gas flowing through the measuring tube 150 can be determined more accurately.

[0058] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0059] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A device for measuring the time of flight of a sound wave, characterized in that, The device for measuring the time of flight of the sound wave includes: a pulse generator, a transducer assembly, a comparator assembly, a gating assembly, a time measurement assembly, and a control assembly; The pulse generator is electrically connected to the transducer assembly, the transducer assembly is electrically connected to the comparator assembly, the comparator assembly is electrically connected to the gating assembly, the gating assembly is electrically connected to the time measurement assembly, and the pulse generator, the transducer assembly, the comparator assembly, the gating assembly, and the time measurement assembly are all electrically connected to the control assembly. The gating assembly includes a first mode and a second mode. When the gating assembly is in the first mode, the sound wave transit time measuring device measures the sound wave transit time according to the first measurement mode; when the gating assembly is in the second mode, the sound wave transit time measuring device measures the sound wave transit time according to the second measurement mode.

2. The device for measuring the time of flight of sound waves according to claim 1, characterized in that, The comparator assembly includes a first comparator and a second comparator, the gating assembly includes a first gating, and the time measurement assembly includes a first time measurement element and a second time measurement element. Both the first comparator and the second comparator are electrically connected to the transducer assembly. Both the first comparator and the second comparator are electrically connected to the first gate. The first gate is electrically connected to the first time measurement element, and the second comparator is electrically connected to the second time measurement element. When the selector assembly is in the first mode, the first selector selects its first branch to connect the first comparator and the first time measuring element, and the first selector disconnects its second branch to disconnect the second comparator and the first time measuring element, so that the first comparator transmits a signal to the first time measuring element, and the second comparator transmits a signal to the second time measuring element; when the selector assembly is in the second mode, the first selector selects its second branch to connect the second comparator and the first time measuring element, and the first selector disconnects its first branch to disconnect the first comparator and the first time measuring element, so that the second comparator transmits a signal to both the first time measuring element and the second time measuring element.

3. The device for measuring the time of flight of sound waves according to claim 1, characterized in that, The comparator assembly includes a third comparator, a fourth comparator, and a fifth comparator; the gating assembly includes a second gating and a third gating; and the time measurement assembly includes a first time measurement element and a second time measurement element. The third comparator, the fourth comparator, and the fifth comparator are all electrically connected to the transducer assembly. The third comparator is electrically connected to the second gate, the second gate is electrically connected to the first time measurement element, the fourth comparator is electrically connected to the third gate, the third gate is electrically connected to the second time measurement element, and the fifth comparator is electrically connected to both the second gate and the third gate. When the selector assembly is in the first mode, the second selector selects its first branch to connect the third comparator and the first time measuring element, and the second selector disconnects its second branch to disconnect the fifth comparator and the first time measuring element. The third selector selects its first branch to connect the fourth comparator and the second time measuring element, and the third selector disconnects its second branch to disconnect the fifth comparator and the second time measuring element, so that the third comparator transmits a signal to the first time measuring element, and the fourth comparator transmits a signal to the second time measuring element. When the selector assembly is in the second mode, the second selector connects the fifth comparator and the first time measuring element, and disconnects the third comparator and the first time measuring element. The third selector connects the fifth comparator and the second time measuring element, and disconnects the fourth comparator and the second time measuring element, so that the fifth comparator transmits a signal to both the first and second time measuring elements.

4. The device for measuring the time of flight of sound waves according to claim 1, characterized in that, The comparator assembly includes a sixth comparator, the gating assembly includes a fourth gating, and the time measurement assembly includes a first time measurement element and a second time measurement element. The sixth comparator is electrically connected to the transducer assembly, the sixth comparator is electrically connected to the fourth selector, the fourth selector is electrically connected to the transducer assembly, and the fourth selector is electrically connected to the first time measuring element and the second time measuring element respectively. When the gating assembly is in the first mode, the fourth gating selects its first branch to connect the sixth comparator to the first and second time measuring elements, and disconnects its second branch to disconnect the transducer from the first and second time measuring elements, so that the sixth comparator transmits a signal to the first and second time measuring elements. When the gating assembly is in the second mode, the fourth gating selects its second branch to connect the transducer assembly to the first and second time measuring elements, and disconnects its first branch to disconnect the sixth comparator from the first and second time measuring elements, so that the transducer assembly transmits a signal to the first and second time measuring elements.

5. The device for measuring the time of flight of sound waves according to claim 4, characterized in that, The pulse generator includes a first pulse generating element and a second pulse generating element; Both the first pulse generating element and the second pulse generating element are electrically connected to the transducer assembly. The first pulse generating element and the first time measuring element are integrated into one unit, and the second pulse generating element and the second time measuring element are integrated into one unit.

6. The device for measuring the time of flight of sound waves according to claim 5, characterized in that, The device for measuring the time of flight of the sound wave also includes an OR gate; The OR gate is electrically connected to the pulse generator, the first time measurement element, and the second time measurement element.

7. The device for measuring the time of sound wave transit according to claim 5, characterized in that, The device for measuring the time of acoustic wave flight also includes an external gate; The external selector is electrically connected to the pulse generator, the first time measurement element, and the second time measurement element.

8. The measuring device for sound wave transit time according to any one of claims 1-5, characterized in that, The device for measuring the time of acoustic wave flight also includes an echo selector; The transducer assembly is electrically connected to the comparator assembly via the echo gate.

9. The device for measuring the time of flight of sound waves according to claim 8, characterized in that, The transducer assembly includes a first transducer and a second transducer; Both the first transducer and the second transducer are electrically connected to the pulse generator, and both the first transducer and the second transducer are electrically connected to the echo selector. When the first transducer emits an ultrasonic wave, the second transducer receives the ultrasonic wave, and the echo gate connects the second transducer and the comparator assembly; when the second transducer emits an ultrasonic wave, the first transducer receives the ultrasonic wave, and the echo gate connects the first transducer and the comparator assembly.

10. The device for measuring the time of flight of sound waves according to claim 9, characterized in that, The device for measuring the time of flight of the sound wave also includes a first driver and a second driver; Both the first driver and the second driver are electrically connected to the pulse generator. The first driver is electrically connected to the first transducer, and the second driver is electrically connected to the second transducer. When the first driver is operating, the first driver drives the first transducer to emit ultrasonic waves; When the second driver is in operation, the second driver drives the second transducer to emit ultrasonic waves.

11. The device for measuring the time of flight of sound waves according to claim 10, characterized in that, The measuring device for acoustic wave flight also includes a first start gate and a second start gate; Both the first driver and the second driver are electrically connected to the first start gantler. The first start gantler is electrically connected to the second start gantler. The pulse generator is electrically connected to the second start gantler. The second start gantler is electrically connected to the time measurement component. The second start gantler is used to select its first branch to connect the first start gantler and the time measurement component, and to disconnect its second branch to disconnect the pulse generator and the time measurement component. Alternatively, the second start gantler is used to select its second branch to connect the pulse generator and the time measurement component, and to disconnect its first branch to disconnect the first start gantler and the time measurement component.

Images