Abnormity detection method for transducer of ultrasonic water meter and related device
By detecting the excitation voltage waveform and the number of output pulses of the ultrasonic water meter transducer, the problem of accurately determining the abnormal type of the transducer in the ultrasonic water meter is solved, and efficient abnormal type identification and early warning are achieved.
Patent Information
- Application Number
- CN202511104214.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-07
- Publication Date
- 2025-11-11
AI Technical Summary
In the existing technology, it is difficult to accurately determine the transducer abnormality type of ultrasonic water meters, mainly because different abnormality types may present highly similar waveforms.
By detecting the excitation voltage waveform of the ultrasonic transducer inside the ultrasonic water meter, it is determined whether there is any abnormality, and the type of abnormality is determined based on the number of output pulses, including short circuit, open circuit and impedance change.
It enables efficient and accurate identification of abnormal types of ultrasonic transducers and provides different early warning information to facilitate maintenance.
Smart Images
Figure CN120927104A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of ultrasonic testing technology, and more specifically, to a transducer anomaly detection method and related apparatus for ultrasonic water meters. Background Technology
[0002] Currently, with the widespread application of ultrasonic water meters, more and more industries are able to use them for relevant testing. For example, users can use ultrasonic water meters to monitor water consumption, ultrasonic flaw detectors to detect defects, and ultrasonic diagnostic instruments to examine bodily organs. These ultrasonic water meters are all equipped with ultrasonic transducers, which emit ultrasonic signals to perform the relevant testing.
[0003] In related technologies, it is usually only possible to determine whether there is an abnormality by detecting the waveform of the ultrasonic signal. However, since different types of abnormalities may present highly similar waveforms, it is difficult to accurately determine the specific type of abnormality. Summary of the Invention
[0004] To address the aforementioned technical problems, embodiments of this application provide a transducer anomaly detection method and related apparatus for ultrasonic water meters, enabling accurate determination of the specific anomaly type of the ultrasonic transducer in the ultrasonic water meter.
[0005] According to one aspect of the embodiments of this application, a transducer anomaly detection method for an ultrasonic water meter is provided, comprising: detecting an ultrasonic transducer inside the ultrasonic water meter to obtain an excitation voltage waveform of the ultrasonic transducer; determining whether the ultrasonic transducer is abnormal based on the excitation voltage waveform; if the ultrasonic transducer is abnormal, determining the number of output pulses of the detection circuit corresponding to the ultrasonic transducer based on the excitation voltage waveform; and determining the anomaly type of the ultrasonic transducer based on the number of output pulses of the detection circuit corresponding to the ultrasonic transducer.
[0006] In another exemplary embodiment, determining whether the ultrasonic transducer is abnormal based on the excitation voltage waveform includes: acquiring the voltage amplitude of each ultrasonic signal in the excitation voltage waveform; comparing the voltage amplitude of each ultrasonic signal in the excitation voltage waveform with a preset threshold voltage to obtain a comparison result; and determining whether the ultrasonic transducer is abnormal based on the comparison result.
[0007] In another exemplary embodiment, determining whether the ultrasonic transducer is abnormal based on the comparison result includes: if the comparison result indicates that the number of ultrasonic signals with voltage amplitudes greater than the preset threshold voltage among the various ultrasonic signals is the same as the preset threshold, then it is determined that the ultrasonic transducer is not abnormal; and / or, if the comparison result indicates that the number of ultrasonic signals with voltage amplitudes greater than the preset threshold voltage among the various ultrasonic signals is different from the preset threshold, then it is determined that the ultrasonic transducer is abnormal.
[0008] In another exemplary embodiment, determining the number of output pulses of the detection circuit corresponding to the ultrasonic transducer based on the excitation voltage waveform includes: determining the number of ultrasonic signals with voltage amplitudes greater than a preset threshold voltage from the excitation voltage waveform; and determining the number of ultrasonic signals with voltage amplitudes greater than the preset threshold voltage as the number of output pulses of the detection circuit corresponding to the ultrasonic transducer.
[0009] In another exemplary embodiment, determining the abnormality type of the ultrasonic transducer based on the number of output pulses of the detection circuit corresponding to the ultrasonic transducer includes: if the number of output pulses of the detection circuit corresponding to the ultrasonic transducer is zero, then the abnormality type of the ultrasonic transducer is determined to be a transducer short circuit; and / or, if the number of output pulses of the detection circuit corresponding to the ultrasonic transducer is the same as the threshold number of pulses output by the detection circuit corresponding to the ultrasonic transducer within a preset detection period, then the abnormality type of the ultrasonic transducer is determined to be a transducer open circuit; and / or, if the number of output pulses of the detection circuit corresponding to the ultrasonic transducer is not zero and is less than the number of output pulses under normal conditions, then the abnormality type of the ultrasonic transducer is determined to be a transducer impedance change.
[0010] In another exemplary embodiment, determining the abnormality type of the ultrasonic transducer based on the number of output pulses of the detection circuit corresponding to the ultrasonic transducer includes: matching a first reference abnormality type of the ultrasonic transducer corresponding to the excitation voltage waveform from a preset database; wherein the preset database stores the correspondence between the excitation voltage waveform and the first reference abnormality type of the ultrasonic transducer; obtaining a second reference abnormality type of the ultrasonic transducer based on the number of output pulses of the detection circuit corresponding to the ultrasonic transducer; if the second reference abnormality type is the same as the first reference abnormality type, then either one is selected as the abnormality type of the ultrasonic transducer.
[0011] In another exemplary embodiment, after determining the abnormality type of the ultrasonic transducer based on the number of output pulses of the detection circuit corresponding to the ultrasonic transducer, the method further includes: if the abnormality type of the ultrasonic transducer is determined to be a transducer short circuit, then a first warning message is issued; if the abnormality type of the ultrasonic transducer is determined to be a transducer open circuit, then a second warning message is issued; and if the abnormality type of the ultrasonic transducer is determined to be a transducer impedance change, then a third warning message is issued.
[0012] According to one aspect of the embodiments of this application, a transducer anomaly detection device for an ultrasonic water meter is provided, comprising: a detection module configured to detect an ultrasonic transducer inside the ultrasonic water meter and obtain an excitation voltage waveform of the ultrasonic transducer; a first determination module configured to determine whether the ultrasonic transducer has an anomaly based on the excitation voltage waveform; a second determination module configured to determine the number of output pulses of the detection circuit corresponding to the ultrasonic transducer based on the excitation voltage waveform if the ultrasonic transducer has an anomaly; and a third determination module configured to determine the anomaly type of the ultrasonic transducer based on the number of output pulses of the detection circuit corresponding to the ultrasonic transducer.
[0013] According to one aspect of the embodiments of this application, an electronic device is provided, including: one or more processors; and a storage device for storing one or more programs, which, when executed by the one or more processors, cause the electronic device to implement the transducer anomaly detection method of the ultrasonic water meter as described above.
[0014] According to one aspect of the embodiments of this application, a computer-readable storage medium is provided, on which computer-readable instructions are stored, which, when executed by a computer processor, cause the computer to perform the transducer anomaly detection method of the ultrasonic water meter as described above.
[0015] In the technical solution provided by the embodiments of this application, the excitation voltage waveform of the ultrasonic transducer inside the ultrasonic water meter is obtained by detecting the transducer; the presence of an abnormality in the ultrasonic transducer is determined based on the excitation voltage waveform; since the amplitude of the excitation voltage changes differently under different abnormal conditions, it will affect the difference in the number of output pulses; therefore, if the ultrasonic transducer is abnormal, the number of output pulses of the corresponding detection circuit is determined based on the excitation voltage waveform; and the type of abnormality of the ultrasonic transducer is determined based on the number of output pulses of the corresponding detection circuit. In this way, by using the number of output pulses as an indirect indicator of electrical characteristics, the type of abnormality of the ultrasonic transducer can be determined efficiently and accurately.
[0016] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description
[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:
[0018] Figure 1 This is a schematic diagram of an implementation environment related to the transducer anomaly detection method of an ultrasonic water meter illustrated in an exemplary embodiment of this application;
[0019] Figure 2 This is a flowchart illustrating an exemplary embodiment of the present application of a transducer anomaly detection method for an ultrasonic water meter;
[0020] Figure 3 This is a schematic diagram of the excitation voltage waveform across the ultrasonic transducer under normal conditions, as shown in an exemplary embodiment of this application.
[0021] Figure 4 This is a schematic diagram of the excitation voltage waveform across the ultrasonic transducer when the anomaly type is a transducer short circuit, as shown in an exemplary embodiment of this application.
[0022] Figure 5 This is a schematic diagram of the excitation voltage waveform across the ultrasonic transducer when the anomaly type is transducer open circuit, as shown in an exemplary embodiment of this application.
[0023] Figure 6 This is a schematic diagram of the excitation voltage waveform across an ultrasonic transducer when the anomaly type is a change in transducer impedance, as illustrated in an exemplary embodiment of this application.
[0024] Figure 7 yes Figure 2 Step S220 in the illustrated embodiment is a flowchart of a method for determining whether an ultrasonic transducer is abnormal based on the excitation voltage waveform in an exemplary embodiment;
[0025] Figure 8 This is a schematic diagram of the detection circuit corresponding to an ultrasonic transducer, as shown in an exemplary embodiment of this application.
[0026] Figure 9 yes Figure 2 Step S230 in the illustrated embodiment is a flowchart of a method for determining the number of output pulses of the detection circuit corresponding to the ultrasonic transducer based on the excitation voltage waveform in an exemplary embodiment.
[0027] Figure 10 This is a flowchart illustrating a method for determining the anomaly type of an ultrasonic transducer, as shown in another exemplary embodiment of this application;
[0028] Figure 11 This is a schematic diagram of the transducer malfunction detection device for an ultrasonic water meter, as shown in an exemplary embodiment of this application.
[0029] Figure 12 A schematic diagram of the structure of a computer system suitable for implementing the electronic device of the present application is shown. Detailed Implementation
[0030] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments identical to those described in this application. Rather, they are merely examples of apparatuses and methods identical to some aspects of this application as detailed in the appended claims.
[0031] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented as application programs, in one or more hardware modules or integrated circuits, or in different models and / or processor devices and / or microcontroller devices.
[0032] The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content and operations / steps, nor do they necessarily have to be performed in the described order. For example, some operations / steps can be broken down, while others can be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.
[0033] It should be noted that "multiple" as mentioned in this application refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.
[0034] It is important to understand that ultrasonic transducers are typically installed in ultrasonic measuring devices and play a central role. Their main function is to convert electrical signals into ultrasonic signals through the piezoelectric effect, specifically as follows:
[0035] Emitting ultrasonic signals: Converting electrical signals into high-frequency mechanical vibrations to generate ultrasonic signals and directional transmission.
[0036] Receive ultrasonic signals: Capture reflected or transmitted ultrasonic signals and convert them into electrical signals for subsequent analysis.
[0037] For example, it can be applied in fields such as medical ultrasound imaging, industrial non-destructive testing, ultrasonic ranging, and ultrasonic water meters. In some embodiments, the ultrasonic measuring device in this application can be an ultrasonic water meter, which includes an ultrasonic transducer. Currently, with the widespread application of ultrasonic water meters, the ultrasonic transducer, the key material used in ultrasonic water meters, needs to be continuously detected for abnormalities during its service life, so as to promptly alarm or adjust the metering algorithm and reduce losses caused by incorrect water meter readings.
[0038] In related technologies, it is usually only possible to determine whether there is an abnormality by detecting the waveform of the ultrasonic signal. However, since different types of abnormalities may present highly similar waveforms, it is difficult to accurately determine the specific type of abnormality.
[0039] Based on this, this application provides a transducer anomaly detection method for ultrasonic water meters. The method involves detecting the ultrasonic transducer within the ultrasonic water meter to obtain its excitation voltage waveform. The presence of an anomaly in the ultrasonic transducer is determined based on the excitation voltage waveform. Since the amplitude of the excitation voltage varies under different anomaly conditions, it affects the number of output pulses. Therefore, if an anomaly is detected, the number of output pulses from the corresponding detection circuit is determined based on the excitation voltage waveform. The anomaly type of the ultrasonic transducer is then determined based on the number of output pulses from the corresponding detection circuit. In this way, by using the number of output pulses as an indirect indicator of electrical characteristics, the anomaly type of the ultrasonic transducer can be determined efficiently and accurately.
[0040] To facilitate understanding of the transducer anomaly detection method for ultrasonic water meters provided in this application embodiment, the following is combined with... Figure 1 The implementation environment shown illustrates a scenario for transducer anomaly detection in ultrasonic water meters; specifically, this implementation environment is a transducer anomaly detection system for ultrasonic water meters, such as... Figure 1 As shown, the transducer malfunction detection system for ultrasonic water meters includes a terminal device 110 and an ultrasonic water meter 120, wherein an ultrasonic transducer is installed in the ultrasonic water meter 120. The terminal device 110 and the ultrasonic water meter 120 can be directly or indirectly connected via wired or wireless means. This application embodiment does not limit the connection method between the terminal device and the ultrasonic water meter.
[0041] Among them, terminal device 110 refers to the electronic device used by the user, which may include, but is not limited to: smartphones (such as Android phones, iOS phones, etc.), tablet computers, portable personal computers, mobile internet devices (MIDs), smart TVs, in-vehicle devices, head-mounted devices, and other smart devices that can be touched.
[0042] Terminal device 110 can refer to one of multiple terminals; this embodiment uses terminal device 110 as an example. Those skilled in the art will understand that the number of terminal devices can be more or less. For example, there may be only one terminal device, or there may be multiple terminal devices. In this case, the implementation environment of the ultrasonic water meter transducer anomaly detection method may also include other terminal devices. This application embodiment does not limit the number or type of terminal devices. Terminal device 110 can be used to execute the ultrasonic water meter transducer anomaly detection method in this application to detect the anomaly type of the ultrasonic transducer in the ultrasonic water meter 120.
[0043] Depending on the implementation requirements, the technical solution of this application can be applied to the ultrasonic water meter 120, the terminal device 110, or jointly implemented by the ultrasonic water meter 120 and the terminal device 110. This application does not impose any special limitations on this. For example, the terminal device 110 can detect the ultrasonic transducer inside the ultrasonic water meter according to the technical solution of this application to obtain the excitation voltage waveform of the ultrasonic transducer; determine whether there is an abnormality in the ultrasonic transducer based on the excitation voltage waveform; if there is an abnormality in the ultrasonic transducer, determine the number of output pulses of the detection circuit corresponding to the ultrasonic transducer based on the excitation voltage waveform; and determine the type of abnormality of the ultrasonic transducer based on the number of output pulses of the detection circuit corresponding to the ultrasonic transducer.
[0044] Alternatively, the controller inside the ultrasonic water meter 120 can detect the ultrasonic transducer inside the ultrasonic water meter according to the technical solution of this application to obtain the excitation voltage waveform of the ultrasonic transducer; determine whether there is an abnormality in the ultrasonic transducer based on the excitation voltage waveform; if there is an abnormality in the ultrasonic transducer, determine the number of output pulses of the detection circuit corresponding to the ultrasonic transducer based on the excitation voltage waveform; and determine the type of abnormality of the ultrasonic transducer based on the number of output pulses of the detection circuit corresponding to the ultrasonic transducer.
[0045] The ultrasonic transducer in the ultrasonic water meter 120 is made of piezoelectric ceramic sheet. After being given an excitation voltage, the ceramic sheet gradually vibrates and is converted into ultrasonic signals. In this embodiment, ultrasonic signals can be emitted periodically, for example, a preset number of ultrasonic signals can be emitted within one cycle. Then, the waveform diagram within this cycle is acquired by a waveform acquisition device and then fed back to the terminal device 110 for processing.
[0046] The transducer malfunction detection method for ultrasonic water meters provided in the embodiments of this application will be described in detail below.
[0047] Please continue reading. Figure 2 , Figure 2 This is a flowchart illustrating an exemplary embodiment of a transducer anomaly detection method for an ultrasonic water meter, as shown in this application. This method can be applied to... Figure 1 The implementation environment shown is specifically executed by the terminal device 110 in that implementation environment. It should be understood that this method can also be applied to other exemplary implementation environments and specifically executed by the terminal device 110 in other implementation environments. This embodiment does not limit the implementation environment to which the method is applicable.
[0048] like Figure 2 As shown, in an exemplary embodiment, the transducer anomaly detection method for an ultrasonic water meter includes at least steps S210 to S240, which are described in detail below:
[0049] Step S210: Detect the ultrasonic transducer inside the ultrasonic water meter to obtain the excitation voltage waveform of the ultrasonic transducer.
[0050] It is understandable that, since the ultrasonic transducer is made of piezoelectric ceramic sheet, after the power supply provides the excitation voltage to the ultrasonic transducer, the piezoelectric ceramic sheet gradually vibrates and is converted into an ultrasonic signal. In this embodiment, the ultrasonic signal can be detected by a preset detection circuit, thereby obtaining the excitation voltage waveform of the ultrasonic transducer.
[0051] For example, combined Figure 3 As shown, Figure 3 This is a schematic diagram illustrating the excitation voltage waveform across an ultrasonic transducer under normal conditions, as shown in an exemplary embodiment of this application. The ultrasonic transducer in this embodiment emits nine ultrasonic signals in one preset cycle. Figure 3 As shown, the horizontal axis of the waveform graph represents time, and the vertical axis represents voltage; there are a total of 9 waveform graphs, from A3-1 to A3-9. In some embodiments, the threshold voltage is 0.7Vcc, where Vcc is the power supply voltage.
[0052] Upon application of an excitation voltage, the piezoelectric effect (inverse piezoelectric effect) within the piezoelectric ceramic sheet is activated. The ceramic sheet begins to deform, overcoming internal damping and static inertia; this mechanical deformation translates into mechanical vibration. Because the vibration requires overcoming initial resistance, the energy input exceeds the instantaneous output, meaning the driving voltage must provide a higher amplitude (power) to force the ceramic sheet to accelerate to its designed amplitude. This is a startup / acceleration transient process.
[0053] After multiple cycles of energy accumulation (e.g.) Figure 3 After four cycles (A3-1 to A3-4), the vibration amplitude of the piezoelectric ceramic sheet successfully reaches its designed amplitude. At this point, the energy provided by the drive system is mainly used to maintain this steady-state vibration and overcome the losses under steady-state conditions. Therefore, the amplitude of the voltage waveform reaches and stabilizes at a relatively high expected plateau value. The shape of the voltage waveform remains stable during the plateau period, as shown below. Figure 3 The five waveforms from A3-5 to A3-9 are shown in the diagram.
[0054] Step S220: Determine whether there is an abnormality in the ultrasonic transducer based on the excitation voltage waveform.
[0055] It is understood that the excitation voltage waveform of an ultrasonic transducer includes the waveform characteristics of each acquired ultrasonic signal. By comparing the acquired waveform characteristics with those under normal conditions, it is possible to accurately and quickly determine whether the ultrasonic transducer is malfunctioning. In some embodiments, the waveform characteristics in this application may be the voltage amplitude of each ultrasonic signal; in other embodiments, the waveform characteristics may be other parameters, such as pulse width.
[0056] Please continue reading. Figures 4 to 6 , Figures 4 to 6 This is a schematic diagram of the excitation voltage waveforms across the ultrasonic transducer under different abnormal conditions. Among them, Figure 4 This is a schematic diagram of the excitation voltage waveform across the ultrasonic transducer when the anomaly type is a transducer short circuit, as shown in an exemplary embodiment of this application. Figure 5 This is a schematic diagram of the excitation voltage waveform across the ultrasonic transducer when the anomaly type is transducer open circuit, as shown in an exemplary embodiment of this application. Figure 6 This is a schematic diagram of the excitation voltage waveform across an ultrasonic transducer when the anomaly type is a change in transducer impedance, as illustrated in an exemplary embodiment of this application.
[0057] Depend on Figure 4As can be seen, in this embodiment, the ultrasonic transducer emits nine ultrasonic signals in a preset cycle as an example. When the abnormality type is a transducer short circuit, the collected excitation voltage waveform is empty. That is, when the transducer is short-circuited, the output voltage of the drive circuit is forcibly pulled down to ground potential (i.e., 0V) under the constraint of the short circuit point. Therefore, since there is no effective drive voltage at both ends of the transducer, it cannot be effectively applied to the external load in the form of voltage, and thus cannot drive the piezoelectric ceramic sheet to generate mechanical vibration. There is no ultrasonic signal output, and therefore no excitation waveform.
[0058] Depend on Figure 5 As can be seen, in this embodiment of the application, the ultrasonic transducer emits 9 ultrasonic signals in one preset cycle as an example. When the abnormality type is transducer open circuit, Figure 5 The image shows the excitation voltage waveforms corresponding to a total of nine ultrasonic signals, from A5-1 to A5-9. Figure 5 It can be seen that A5-1 to A5-9 are nine square waves with the same voltage. This is because, under open-circuit conditions, the impedance is infinite, and the output of the drive circuit is not connected to any substantial load (i.e., no piezoelectric ceramic plate is connected). Therefore, there is no current discharge path, and the drive source hardly needs to output current (only a tiny parasitic capacitance charging current exists, which can be ignored here). Therefore, its excitation voltage does not need to drive anything and is not affected by load characteristics. Thus, it can output a perfect square wave voltage waveform under no-load conditions, completely following the set switching logic and level. Therefore, the waveforms from A5-1 to A5-9 are square waves with the same voltage.
[0059] Depend on Figure 6 As can be seen, this embodiment of the application takes the ultrasonic transducer emitting 9 ultrasonic signals in one preset cycle as an example. Therefore, a total of 9 ultrasonic signals, A6-1 to A6-9, are collected as excitation voltage waveforms. When the abnormality type is impedance change, these 9 waveforms A6-1 to A6-9 are... Figure 3 Compared to the voltage amplitude in the nine waveforms under normal conditions, the voltage amplitude is significantly reduced.
[0060] It's important to understand that "impedance change" typically refers to a significant increase in the equivalent impedance of a transducer compared to its normal design or matching value. This can have various causes: aging, cracking, or partial depolarization of the piezoelectric ceramic sheet; increased contact resistance due to corrosion at connection points; or a shift in the resonant frequency due to changes in the physical structure.
[0061] In this situation, the transducer will exhibit a higher load impedance than normal. According to Ohm's law, under the same driving voltage, a higher load impedance will lead to a significant reduction in the current flowing through the load. To maintain circuit balance, the driving circuit will reduce the output voltage to limit the output current, resulting in a significant reduction in voltage amplitude. Because of the reduced voltage amplitude, the actual electric field strength applied to the piezoelectric ceramic sheet weakens, and the amplitude of its generated mechanical vibration will inevitably decrease, ultimately leading to a severe attenuation of the ultrasonic output signal strength. Therefore, when impedance transformation occurs in the transducer... Figure 6 All waveforms in the excitation voltage waveform diagram collected were lower than the voltage amplitude under normal conditions.
[0062] In some embodiments, combined with Figure 7 As shown, Figure 7 yes Figure 2 Step S220 in the illustrated embodiment is a flowchart of a method for determining whether an ultrasonic transducer is malfunctioning based on the excitation voltage waveform in an exemplary embodiment; it includes at least steps S710 to S730, which are described in detail below:
[0063] Step S710: Obtain the voltage amplitude of each ultrasonic signal in the excitation voltage waveform.
[0064] It is understandable that, based on the above Figures 3 to 6 As shown, the voltage amplitudes corresponding to different abnormal conditions of the transducer are different in the excitation voltage waveform. Therefore, in this embodiment, the presence of an abnormality in the ultrasonic transducer can be directly determined by obtaining the voltage amplitude of each ultrasonic signal in the excitation voltage waveform.
[0065] In some embodiments, the ultrasonic transducer in this application embodiment emits nine ultrasonic signals within a preset period, and the voltage amplitude corresponding to these nine ultrasonic signals can also be collected.
[0066] Step S720: Compare the voltage amplitude of each ultrasonic signal in the excitation voltage waveform with the preset threshold voltage to obtain the comparison result.
[0067] It is understandable that the electric field strength generated by the driving voltage applied to the piezoelectric ceramic sheet must reach a certain level to cause a sufficient number of domains within the material to shift or the crystal lattice to undergo significant deformation. Below this electric field strength (i.e., the preset voltage threshold), the strain generated by the material is very small, almost insufficient to drive mechanical vibration to generate usable ultrasonic signals. Therefore, in this embodiment, by setting a threshold voltage and comparing the voltage amplitude of each ultrasonic signal in the acquired excitation voltage waveform with the preset threshold voltage, the number of excitation voltage waveforms exceeding the preset threshold voltage under different anomaly types can be determined, i.e., the number of usable ultrasonic signals. In some embodiments, the preset threshold voltage is 0.7Vcc, where Vcc is the power supply voltage.
[0068] Step S730: Determine whether there is any abnormality in the ultrasonic transducer based on the comparison results.
[0069] In this embodiment of the application, by Figure 3 It can be seen that when the transducer is in normal condition, there are 6 excitation voltage waveforms that exceed the threshold voltage. These can be used as preset thresholds for comparison and judgment, which can conveniently and quickly determine whether there is an abnormality in the ultrasonic transducer.
[0070] For example, determining whether an ultrasonic transducer is malfunctioning based on the comparison results includes:
[0071] If the comparison results indicate that the number of ultrasonic signals with voltage amplitudes greater than a preset threshold voltage is the same as the preset threshold, then it is determined that the ultrasonic transducer is not malfunctioning; and / or,
[0072] If the number of ultrasonic signals with voltage amplitudes greater than a preset threshold voltage differs from the preset threshold value in the comparison results, then it is determined that the ultrasonic transducer is malfunctioning.
[0073] In this embodiment, the preset threshold is the number of pulses that the detection circuit can output when the transducer is in normal condition. By determining the number of ultrasonic signals with voltage amplitudes greater than the preset threshold voltage among the acquired ultrasonic signals, if the number of ultrasonic signals greater than the preset threshold voltage is the same as the preset threshold, the ultrasonic transducer can be considered normal; otherwise, it is considered that the ultrasonic transducer is abnormal.
[0074] Step S230: If the ultrasonic transducer is abnormal, determine the number of output pulses of the detection circuit corresponding to the ultrasonic transducer based on the excitation voltage waveform.
[0075] As can be understood from the above, the ultrasonic transducer is based on the piezoelectric effect, with the excitation voltage driving the ceramic plate to vibrate. Under normal conditions, amplitude changes reflect the startup process; under abnormal conditions, electrical characteristics (short circuit, open circuit, or impedance change) directly alter the excitation voltage waveform. In this embodiment, pulses are output only during the stable phase. This results in the detection circuit outputting different numbers of pulses under different states, allowing the presence of an abnormality to be determined by the number of output pulses. Furthermore, the number of excitation voltage waveforms exceeding a preset threshold voltage can be quickly and accurately obtained from the excitation voltage waveform, thus revealing the number of output pulses from the corresponding detection circuit of the ultrasonic transducer.
[0076] Combination Figure 8 As shown, Figure 8 This is a schematic diagram of the detection circuit corresponding to an ultrasonic transducer, as shown in an exemplary embodiment of this application. Figure 8 In this circuit, the inputs to the detection circuit are the acquired excitation voltage waveform and a preset threshold voltage. When the amplitude of the excitation voltage waveform exceeds the preset threshold voltage, the detection circuit outputs a pulse. By acquiring the number of pulses output by the detection circuit through a microcontroller, the number of output pulses of the corresponding detection circuit of the ultrasonic transducer can be obtained. Furthermore, the specific abnormality type can be determined based on the number of output pulses.
[0077] Combination Figure 9 As shown, Figure 9 yes Figure 2 The illustrated embodiment shows step S230, a flowchart of a method for determining the number of output pulses of the detection circuit corresponding to the ultrasonic transducer based on the excitation voltage waveform in an exemplary embodiment; it includes at least steps S910 to S920, which are described in detail below:
[0078] Step S910: Determine the number of ultrasonic signals whose voltage amplitude is greater than a preset threshold voltage from the excitation voltage waveform.
[0079] Step S920: The number of ultrasonic signals with voltage amplitude greater than the preset threshold voltage is determined as the number of output pulses of the detection circuit corresponding to the ultrasonic transducer.
[0080] In this embodiment, the number of ultrasonic signals with voltage amplitudes greater than a preset threshold voltage can be determined from the excitation voltage waveform, thereby directly obtaining the number of output pulses of the detection circuit corresponding to the ultrasonic transducer.
[0081] Step S240: Determine the abnormality type of the ultrasonic transducer based on the number of output pulses of the detection circuit corresponding to the ultrasonic transducer.
[0082] In this embodiment, since the amplitude of the excitation voltage of the ultrasonic transducer varies under different abnormal conditions, it will affect the difference in the number of output pulses. Therefore, by using the number of output pulses as an indirect indicator of electrical characteristics, the abnormality type of the ultrasonic transducer can be determined efficiently and accurately.
[0083] For example, the abnormality type of the ultrasonic transducer is determined based on the number of output pulses of the detection circuit corresponding to the ultrasonic transducer, including: if the number of output pulses of the detection circuit corresponding to the ultrasonic transducer is zero, then the abnormality type of the ultrasonic transducer is determined to be a transducer short circuit.
[0084] For example, in this embodiment of the application, an ultrasonic transducer emits 9 ultrasonic signals in a preset detection cycle. The preset threshold voltage is 0.7Vcc. Under normal conditions, the ultrasonic transducer... Figure 3 It can be seen that the voltage amplitudes of the six excitation voltage waveforms A3-4 to A3-9 are all higher than the preset threshold voltage of 0.7Vcc. Therefore, under normal circumstances, the detection circuit will output six high-level pulses.
[0085] However, if the output pulse count of the detection circuit corresponding to the ultrasonic transducer is zero, refer to Figure 4 It can be seen that when the abnormality type of the ultrasonic transducer is transducer short circuit, the excitation voltage waveform is 0V, which is lower than the preset threshold voltage of 0.7Vcc, and there is no pulse output. Therefore, it can be determined that if the output pulse count of the detection circuit corresponding to the ultrasonic transducer is zero, then the abnormality type of the ultrasonic transducer is determined to be transducer short circuit.
[0086] For example, the abnormality type of the ultrasonic transducer is determined based on the number of output pulses of the detection circuit corresponding to the ultrasonic transducer, including: if the number of output pulses of the detection circuit corresponding to the ultrasonic transducer is the same as the threshold number of pulses output by the detection circuit corresponding to the ultrasonic transducer within a preset detection period, then the abnormality type of the ultrasonic transducer is determined to be transducer open circuit.
[0087] For example, in this embodiment of the application, an ultrasonic transducer emits 9 ultrasonic signals in a preset detection cycle, with a preset threshold voltage of 0.7Vcc. Figure 5 It can be seen that when the abnormality type of the ultrasonic transducer is transducer open circuit, Figure 5The excitation voltage waveforms corresponding to the nine ultrasonic signals (A5-1 to A5-9) are all square waves with the same voltage amplitude, and all of them are greater than the preset threshold voltage of 0.7Vcc. Therefore, under these conditions, the detection circuit corresponding to the ultrasonic transducer outputs nine pulses within the preset detection period, which is the pulse count threshold. Thus, if the number of output pulses from the detection circuit corresponding to the ultrasonic transducer is the same as the pulse count threshold within the preset detection period, the abnormality type of the ultrasonic transducer is a transducer open circuit.
[0088] For example, the abnormality type of the ultrasonic transducer is determined based on the number of output pulses of the detection circuit corresponding to the ultrasonic transducer, including: if the number of output pulses of the detection circuit corresponding to the ultrasonic transducer is not zero and is less than the number of output pulses under normal conditions, then the abnormality type of the ultrasonic transducer is determined to be a change in transducer impedance.
[0089] For example, in this embodiment of the application, an ultrasonic transducer emits 9 ultrasonic signals in a preset detection cycle, with a preset threshold voltage of 0.7Vcc. Figure 6 It can be seen that, Figure 6 The image shows the excitation voltage waveforms corresponding to nine ultrasonic signals, A6-1 to A6-9. When the anomaly type is impedance change, these nine waveforms (A6-1 to A6-9) are... Figure 3 Compared to the voltage amplitudes in the nine waveforms under normal conditions, the voltage amplitudes are all significantly reduced. Therefore, when the transducer malfunction is impedance transformation, the number of pulses it can output is lower than the number of pulses output under normal conditions. Figure 6 Only the voltage amplitudes of waveforms A6-5 to A6-9 are greater than the preset threshold voltage of 0.7Vcc, but less than the number of output pulses (6) under normal conditions. Therefore, if the number of output pulses of the detection circuit corresponding to the ultrasonic transducer is not zero and is less than the number of output pulses under normal conditions, then the abnormality type of the ultrasonic transducer is determined to be a change in transducer impedance.
[0090] In other embodiments, the abnormality type of the ultrasonic transducer can also be determined in the following manner, including at least steps S1010 to S1030, as detailed below:
[0091] Step S1010: Match the first reference anomaly type of the ultrasonic transducer corresponding to the excitation voltage waveform from the preset database. The preset database stores the correspondence between the excitation voltage waveform and the first reference anomaly type of the ultrasonic transducer.
[0092] It is understood that in the embodiments of this application, waveforms collected under different transducer abnormality types can be pre-stored in the preset database of the terminal device. In this way, after the excitation voltage waveform is collected in real time, the first reference abnormality type can be determined more quickly by directly matching it with the preset database, and it is convenient to provide a reference for the subsequent final abnormality type judgment, thereby improving the judgment accuracy.
[0093] Step S1020: Obtain the second reference anomaly type of the ultrasonic transducer based on the number of output pulses of the detection circuit corresponding to the ultrasonic transducer.
[0094] It is understood that the method for obtaining the second reference anomaly type of the ultrasonic transducer based on the number of output pulses of the detection circuit corresponding to the ultrasonic transducer in the embodiments of this application is the transducer anomaly detection method of the ultrasonic water meter shown in this application, namely the method of steps S210 to S240, which will not be described again in the embodiments of this application.
[0095] Step S1030: If the second reference anomaly type is the same as the first reference anomaly type, then either one can be selected as the anomaly type of the ultrasonic transducer.
[0096] In this embodiment, the first and reference anomaly types determined by waveform recognition are compared with the second reference anomaly type determined by the number of pulses. Compared with relying solely on the number of pulses to determine the specific anomaly type, this method can improve the accuracy of transducer anomaly type determination.
[0097] After determining the abnormality type of the ultrasonic transducer based on the number of output pulses of the detection circuit corresponding to the ultrasonic transducer, the process further includes: issuing a first warning message if the abnormality type of the ultrasonic transducer is determined to be a short circuit; issuing a second warning message if the abnormality type of the ultrasonic transducer is determined to be an open circuit; and issuing a third warning message if the abnormality type of the ultrasonic transducer is determined to be a change in transducer impedance.
[0098] In this embodiment, different warning prompts can be given under different abnormal conditions, so that users can more intuitively understand the current fault type of the ultrasonic transducer and facilitate maintenance.
[0099] Combination Figure 11 As shown, Figure 11 This is a structural diagram illustrating an exemplary embodiment of an ultrasonic water meter transducer malfunction detection device. This ultrasonic water meter transducer malfunction detection device can be applied to… Figure 1 The implementation environment shown, for example, the transducer malfunction detection device of the ultrasonic water meter can be specifically configured in... Figure 1The ultrasonic water meter 120 is shown in the illustrated implementation environment. Of course, the transducer malfunction detection device of this ultrasonic water meter can also be applied to other exemplary implementation environments and specifically configured in the ultrasonic water meter. This embodiment does not limit the implementation environment to which the device is applicable.
[0100] like Figure 11 As shown, this exemplary transducer anomaly detection device for an ultrasonic water meter is applied to an ultrasonic water meter, such as an ultrasonic metering water meter 120. The transducer anomaly detection device includes: a detection module 1110, a first determination module 1120, a second determination module 1130, and a third determination module 1140. The detection module 1110 is configured to detect the ultrasonic transducer within the ultrasonic water meter and obtain the excitation voltage waveform of the ultrasonic transducer. The first determination module 1120 is configured to determine whether the ultrasonic transducer has an anomaly based on the excitation voltage waveform. The second determination module 1130 is configured to determine the number of output pulses of the detection circuit corresponding to the ultrasonic transducer based on the excitation voltage waveform if the ultrasonic transducer has an anomaly. The third determination module 1140 is configured to determine the anomaly type of the ultrasonic transducer based on the number of output pulses of the detection circuit corresponding to the ultrasonic transducer.
[0101] In this embodiment, an exemplary ultrasonic water meter transducer anomaly detection device is used. Since the amplitude of the excitation voltage varies under different anomaly conditions, affecting the number of output pulses, if an ultrasonic transducer malfunctions, the number of output pulses from the corresponding detection circuit is determined based on the excitation voltage waveform. The anomaly type of the ultrasonic transducer is then determined based on the number of output pulses from the corresponding detection circuit. Thus, by using the number of output pulses as an indirect indicator of electrical characteristics, the anomaly type of the ultrasonic transducer can be determined efficiently and accurately.
[0102] In another exemplary embodiment, the first determining module 1120 is configured to determine whether the ultrasonic transducer is abnormal based on the excitation voltage waveform by: acquiring the voltage amplitude of each ultrasonic signal in the excitation voltage waveform; comparing the voltage amplitude of each ultrasonic signal in the excitation voltage waveform with a preset threshold voltage to obtain a comparison result; and determining whether the ultrasonic transducer is abnormal based on the comparison result.
[0103] In another exemplary embodiment, the first determining module 1120 is configured to determine whether the ultrasonic transducer is abnormal based on the comparison result in the following manner: if the number of ultrasonic signals with voltage amplitudes greater than a preset threshold voltage among the voltage amplitudes of each ultrasonic signal represented by the comparison result is the same as the preset threshold, then the ultrasonic transducer is determined to be normal; and / or, if the number of ultrasonic signals with voltage amplitudes greater than a preset threshold voltage among the voltage amplitudes of each ultrasonic signal represented by the comparison result is different from the preset threshold, then the ultrasonic transducer is determined to be abnormal.
[0104] In another exemplary embodiment, the second determining module 1130 is configured to determine the number of output pulses of the detection circuit corresponding to the ultrasonic transducer based on the excitation voltage waveform in the following manner: determining the number of ultrasonic signals with voltage amplitude greater than a preset threshold voltage from the excitation voltage waveform; and determining the number of ultrasonic signals with voltage amplitude greater than the preset threshold voltage as the number of output pulses of the detection circuit corresponding to the ultrasonic transducer.
[0105] In another exemplary embodiment, the third determining module 1140 is configured to determine the abnormality type of the ultrasonic transducer based on the number of output pulses of the detection circuit corresponding to the ultrasonic transducer in the following manner: if the number of output pulses of the detection circuit corresponding to the ultrasonic transducer is zero, then the abnormality type of the ultrasonic transducer is determined to be a transducer short circuit; and / or, if the number of output pulses of the detection circuit corresponding to the ultrasonic transducer is the same as the threshold number of pulses output by the detection circuit corresponding to the ultrasonic transducer within a preset detection period, then the abnormality type of the ultrasonic transducer is determined to be a transducer open circuit; and / or, if the number of output pulses of the detection circuit corresponding to the ultrasonic transducer is not zero and is less than the number of output pulses under normal conditions, then the abnormality type of the ultrasonic transducer is determined to be a transducer impedance change.
[0106] In another exemplary embodiment, the third determining module 1140 is further configured to determine the abnormality type of the ultrasonic transducer based on the number of output pulses of the detection circuit corresponding to the ultrasonic transducer in the following manner: matching a first reference abnormality type of the ultrasonic transducer corresponding to the excitation voltage waveform from a preset database; wherein the preset database stores the correspondence between the excitation voltage waveform and the first reference abnormality type of the ultrasonic transducer; obtaining a second reference abnormality type of the ultrasonic transducer based on the number of output pulses of the detection circuit corresponding to the ultrasonic transducer; if the second reference abnormality type is the same as the first reference abnormality type, then either one is selected as the abnormality type of the ultrasonic transducer.
[0107] In another exemplary embodiment, the transducer malfunction detection device of the ultrasonic water meter further includes an early warning module. This early warning module is configured to, after determining the malfunction type of the ultrasonic transducer based on the number of output pulses of the detection circuit corresponding to the ultrasonic transducer, issue a first early warning message if the malfunction type of the ultrasonic transducer is determined to be a transducer short circuit; issue a second early warning message if the malfunction type of the ultrasonic transducer is determined to be a transducer open circuit; and issue a third early warning message if the malfunction type of the ultrasonic transducer is determined to be a transducer impedance change.
[0108] It should be noted that the transducer anomaly detection device for ultrasonic water meters provided in the above embodiments and the transducer anomaly detection method for ultrasonic water meters provided in the above embodiments belong to the same concept. The specific operation methods of each module and unit have been described in detail in the method embodiments and will not be repeated here. In practical applications, the transducer anomaly detection device for ultrasonic water meters provided in the above embodiments can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. This is not a limitation here.
[0109] Embodiments of this application also provide an electronic device, including: one or more processors; and a storage device for storing one or more programs, which, when executed by the one or more processors, cause the electronic device to implement the transducer anomaly detection method for ultrasonic water meters provided in the above embodiments.
[0110] Figure 12 A schematic diagram of a computer system suitable for implementing the embodiments of this application is shown. It should be noted that... Figure 12 The computer system 1200 of the electronic device shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of this application.
[0111] like Figure 12As shown, the computer system 1200 includes a Central Processing Unit (CPU) 1201, which can perform various appropriate actions and processes based on programs stored in Read-Only Memory (ROM) 1202 or programs loaded from storage portion 1208 into Random Access Memory (RAM) 1203, such as performing the methods described in the above embodiments. Various programs and data required for system operation are also stored in RAM 1203. The CPU 1201, ROM 1202, and RAM 1203 are interconnected via bus 1204. An Input / Output (I / O) interface 1205 is also connected to bus 1204.
[0112] The following components are connected to I / O interface 1205: an input section 1206 including a keyboard, mouse, etc.; an output section 1207 including a cathode ray tube (CRT), liquid crystal display (LCD), etc., and speakers, etc.; a storage section 1208 including a hard disk, etc.; and a communication section 1209 including a model interface card such as a LAN (Local Area Network) card, modem, etc. The communication section 1209 performs communication processing via a model such as the Internet. A drive 1210 is also connected to I / O interface 1205 as needed. Removable media 1211, such as a disk, optical disk, magneto-optical disk, semiconductor memory, etc., are installed on drive 1210 as needed so that computer programs read from them can be installed into storage section 1208 as needed.
[0113] Specifically, according to embodiments of this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program including a computer program for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from the model via communication section 1209, and / or installed from removable medium 1211. When the computer program is executed by central processing unit (CPU) 1201, it performs various functions defined in the system of this application.
[0114] It should be noted that the computer-readable medium shown in the embodiments of this application can be a computer-readable signal medium or a computer-readable storage medium, or any combination of the two. A computer-readable storage medium can be, for example, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of a computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), flash memory, optical fiber, portable compact disc read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this application, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, carrying a computer-readable computer program. Such propagated data signals can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable signal media can also be any computer-readable medium other than computer-readable storage media, which can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device. The computer program contained on the computer-readable medium can be transmitted using any suitable medium, including but not limited to wireless, wired, etc., or any suitable combination thereof.
[0115] Another aspect of this application provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the transducer anomaly detection method for an ultrasonic water meter as described above. This computer-readable storage medium may be included in the electronic device described in the above embodiments, or it may exist independently and not assembled into the electronic device.
[0116] Another aspect of this application provides a computer program product or computer program including computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the transducer anomaly detection method for ultrasonic water meters provided in the various embodiments described above.
[0117] The above description is merely a preferred exemplary embodiment of this application and is not intended to limit the implementation of this application. Those skilled in the art can easily make corresponding modifications or alterations based on the main concept and spirit of this application. Therefore, the scope of protection of this application should be determined by the scope of protection claimed in the claims.
[0118] It should be noted that when the embodiments of this application are applied to specific products or technologies, such as when obtaining the excitation voltage waveform of an ultrasonic transducer, it is inevitable to obtain the relevant operating parameters of the ultrasonic water meter. Therefore, it is necessary to obtain the user's permission or consent, and the collection, use and processing of relevant data must comply with the relevant laws, regulations and standards of the relevant countries and regions.
Claims
1. A method for detecting transducer malfunctions in an ultrasonic water meter, characterized in that, include: The ultrasonic transducer inside the ultrasonic water meter is tested to obtain the excitation voltage waveform of the ultrasonic transducer. Determine whether the ultrasonic transducer is malfunctioning based on the excitation voltage waveform; If the ultrasonic transducer is abnormal, the number of output pulses of the detection circuit corresponding to the ultrasonic transducer is determined based on the excitation voltage waveform. The abnormality type of the ultrasonic transducer is determined based on the number of output pulses of the detection circuit corresponding to the ultrasonic transducer.
2. The method according to claim 1, characterized in that, The step of determining whether the ultrasonic transducer is malfunctioning based on the excitation voltage waveform includes: Obtain the voltage amplitude of each ultrasonic signal in the excitation voltage waveform; The voltage amplitude of each ultrasonic signal in the excitation voltage waveform is compared with a preset threshold voltage to obtain the comparison result; The comparison results are used to determine whether the ultrasonic transducer is malfunctioning.
3. The method according to claim 2, characterized in that, Determining whether the ultrasonic transducer is malfunctioning based on the comparison results includes: If the comparison result indicates that the number of ultrasonic signals with voltage amplitudes greater than the preset threshold voltage is the same as the preset threshold, then it is determined that the ultrasonic transducer is not abnormal; and / or, If the comparison result indicates that the number of ultrasonic signals with voltage amplitudes greater than the preset threshold voltage is different from the preset threshold, then it is determined that the ultrasonic transducer is abnormal.
4. The method according to claim 1, characterized in that, Determining the number of output pulses of the detection circuit corresponding to the ultrasonic transducer based on the excitation voltage waveform includes: From the excitation voltage waveform, determine the number of ultrasonic signals whose voltage amplitude is greater than a preset threshold voltage; The number of ultrasonic signals with voltage amplitudes greater than a preset threshold voltage is determined as the number of output pulses of the detection circuit corresponding to the ultrasonic transducer.
5. The method according to claim 1, characterized in that, The step of determining the abnormality type of the ultrasonic transducer based on the number of output pulses of the detection circuit corresponding to the ultrasonic transducer includes: If the number of output pulses of the detection circuit corresponding to the ultrasonic transducer is zero, then the abnormality type of the ultrasonic transducer is determined to be a transducer short circuit; and / or, If the number of output pulses of the detection circuit corresponding to the ultrasonic transducer is the same as the threshold number of pulses output by the detection circuit corresponding to the ultrasonic transducer within a preset detection period, then the abnormality type of the ultrasonic transducer is determined to be transducer open circuit; and / or, If the number of output pulses of the detection circuit corresponding to the ultrasonic transducer is not zero and is less than the number of output pulses under normal conditions, then the abnormality type of the ultrasonic transducer is determined to be a change in transducer impedance.
6. The method according to claim 1, characterized in that, The step of determining the abnormality type of the ultrasonic transducer based on the number of output pulses of the detection circuit corresponding to the ultrasonic transducer includes: The first reference anomaly type of the ultrasonic transducer corresponding to the excitation voltage waveform is matched from the preset database; wherein, the preset database stores the correspondence between the excitation voltage waveform and the first reference anomaly type of the ultrasonic transducer. The second reference anomaly type of the ultrasonic transducer is obtained based on the number of output pulses of the detection circuit corresponding to the ultrasonic transducer. If the second reference anomaly type is the same as the first reference anomaly type, then either one can be selected as the anomaly type of the ultrasonic transducer.
7. The method according to claim 1, characterized in that, After determining the fault type of the ultrasonic transducer based on the number of output pulses of the detection circuit corresponding to the ultrasonic transducer, the method further includes: If the abnormality type of the ultrasonic transducer is determined to be a transducer short circuit, a first warning message will be issued. If the abnormality type of the ultrasonic transducer is determined to be a transducer open circuit, a second early warning message will be issued. If the abnormality of the ultrasonic transducer is determined to be a change in transducer impedance, a third early warning message will be issued.
8. A transducer malfunction detection device for an ultrasonic water meter, characterized in that, include: The detection module is configured to detect the ultrasonic transducer inside the ultrasonic water meter and obtain the excitation voltage waveform of the ultrasonic transducer. The first determining module is configured to determine whether there is an abnormality in the ultrasonic transducer based on the excitation voltage waveform; The second determining module is configured to determine the number of output pulses of the detection circuit corresponding to the ultrasonic transducer based on the excitation voltage waveform if the ultrasonic transducer is abnormal. The third determining module is configured to determine the abnormality type of the ultrasonic transducer based on the number of output pulses of the detection circuit corresponding to the ultrasonic transducer.
9. An electronic device, characterized in that, include: One or more processors; A storage device for storing one or more programs, which, when executed by one or more processors, cause the electronic device to implement the transducer anomaly detection method for an ultrasonic water meter as described in any one of claims 1 to 7.
10. A computer-readable storage medium, characterized in that, It stores computer-readable instructions, which, when executed by the processor of a computer, cause the computer to perform the transducer anomaly detection method of the ultrasonic water meter according to any one of claims 1 to 7.