CN115046615A - Ultrasonic water dispenser and fault detection method and processor thereof - Google Patents

Abstract

The present application relates to the field of household appliances, in particular to a fault detection method for an ultrasonic water dispenser, a processor and an ultrasonic water dispenser. The processor controls the ultrasonic probe to transmit the detection signal, obtains the echo signal curve corresponding to the detection signal, and then determines whether the ultrasonic probe fails according to the echo signal curve. Through the above fault detection method, the failure of the ultrasonic probe can be detected in time, and remedial measures can be completed in time to avoid larger accidents.

Description

Ultrasonic water dispenser and its fault detection method and processor

technical field

The present application relates to the field of household appliances, in particular to a fault detection method for an ultrasonic water dispenser, a processor and an ultrasonic water dispenser.

Background technique

At present, ultrasonic water dispensers that use ultrasonic waves to realize automatic water discharge use ultrasonic probes to transmit and receive ultrasonic waves to identify the height of the cup and the height of the liquid level, so as to complete the actions of water discharge and water stop.

SUMMARY OF THE INVENTION

The present application provides a fault detection method for an ultrasonic water dispenser, a processor, and an ultrasonic water dispenser.

A first aspect of the present application provides a fault detection method for an ultrasonic water dispenser, which is applied to an ultrasonic water dispenser. The ultrasonic water dispenser includes an ultrasonic probe, and the method includes:

Control the ultrasonic probe to emit detection signals;

Obtain the echo signal curve corresponding to the detection signal;

Determine whether the ultrasonic probe is faulty according to the echo signal curve.

In the embodiment of the present application, determining whether the ultrasonic probe is faulty according to the echo signal curve includes:

Compare the characteristics of the echo signal curve with the standard echo signal curve, and judge whether the ultrasonic probe is faulty according to the comparison result;

The standard echo signal curve is obtained in the initial working state of the ultrasonic probe.

In the embodiment of the present application, the characteristics of the echo signal curve and the standard echo signal curve are compared, and according to the comparison result, judging whether the ultrasonic probe is faulty includes:

Extract the time domain length from the beginning of the echo signal curve to the peak value of the receiving area from the echo signal curve;

If the time domain length does not match the time domain length from the beginning of the standard echo signal curve to the peak value of the receiving area in the standard echo signal curve, it is determined that the ultrasonic probe is faulty.

In the embodiment of the present application, the characteristics of the echo signal curve and the standard echo signal curve are compared, and according to the comparison result, judging whether the ultrasonic probe is faulty includes:

Extract the time domain length of the transmitting area, the amplitude of the transmitting area and the amplitude of the receiving area from the echo signal curve;

If the time domain length of the transmitting area, the amplitude of the transmitting area and the amplitude of the receiving area of the echo signal curve cannot be matched with the time domain length of the transmitting area, the amplitude of the transmitting area and the amplitude of the receiving area of the standard echo signal curve, it is determined that the ultrasonic wave The probe has failed.

In the embodiment of the present application, the characteristics of the echo signal curve and the standard echo signal curve are compared, and according to the comparison result, judging whether the ultrasonic probe is faulty includes:

Determine the fitting degree of the echo signal curve and the standard echo signal curve;

If the fit does not meet the preset criteria, it is determined that the ultrasonic probe is faulty.

In the embodiment of the present application, the ultrasonic probe includes a plurality of ultrasonic probes;

Controlling the ultrasonic probe to transmit the detection signal includes: controlling any ultrasonic probe in the plurality of ultrasonic probes to transmit the detection signal;

Obtaining the echo signal curve corresponding to the detection signal includes: controlling other ultrasonic probes that do not transmit the detection signal among the plurality of ultrasonic probes to obtain the echo signal curve.

In the embodiment of the present application, controlling the ultrasonic probe to transmit the detection signal includes:

Regularly control the ultrasonic probe to emit detection signals;

Controlling the ultrasonic probe to transmit a detection signal after receiving a preset time period; and/or

The ultrasonic probe is controlled to emit a detection signal within a predetermined period of time.

In the embodiment of the present application, the method further includes:

When it is determined that the ultrasonic probe is faulty, the ultrasonic water dispenser is controlled to enter the lock protection mode, and/or a prompt is issued.

A second aspect of the present application provides a processor configured to perform the above-described fault detection method for an ultrasonic water dispenser.

A third aspect of the present application provides an ultrasonic water dispenser, comprising at least one ultrasonic probe, and a processor configured to execute the above-mentioned fault detection method for an ultrasonic water dispenser.

A fourth aspect of the present application provides a machine-readable storage medium, where instructions are stored on the machine-readable storage medium, the instructions, when executed by a processor, cause the processor to implement the above-mentioned fault detection method for an ultrasonic water dispenser.

Through the above technical solution, the ultrasonic probe transmits ultrasonic signals during self-inspection or mutual inspection to obtain the echo signal curve, determines the height detected by the ultrasonic probe according to the echo signal curve, and judges the ultrasonic probe by comparing the detected height with the preset height. Whether there is a fault; or by judging whether the relevant parameters of the echo signal curve correspond to the relevant parameters of the standard echo signal curve obtained when the ultrasonic probe works normally, to judge whether the ultrasonic probe is faulty; or by the echo signal curve and the standard echo signal curve. The fitting value of the echo signal curve determines whether the ultrasonic probe is faulty. Through the above fault detection method, the failure of the ultrasonic probe can be detected in time, and remedial measures can be completed in time to avoid larger accidents.

Description of drawings

FIG. 1 schematically shows a schematic flowchart of a fault detection method for an ultrasonic water dispenser according to an embodiment of the present application;

FIG. 2 schematically shows a schematic diagram of an echo signal generation mechanism according to an embodiment of the present application;

FIG. 3 schematically shows a schematic diagram of an echo signal curve in the absence of a water receiving platform according to an embodiment of the present application;

FIG. 4 schematically shows a schematic diagram of an echo signal curve in a mutual inspection state of an ultrasonic probe according to an embodiment of the present application;

FIG. 5 schematically shows a schematic diagram of an echo signal curve in the presence of a water receiving platform according to an embodiment of the present application;

FIG. 6 schematically shows a schematic flowchart of comparing the characteristics of an echo signal curve with a standard echo signal curve to determine whether a fault occurs according to an embodiment of the present application;

FIG. 7 schematically shows another schematic flowchart of comparing the characteristics of an echo signal curve with a standard echo signal curve to determine whether a fault occurs according to an embodiment of the present application;

FIG. 8 schematically shows yet another schematic flowchart of comparing the characteristics of an echo signal curve with a standard echo signal curve to determine whether a fault occurs according to an embodiment of the present application; and

FIG. 9 schematically shows a structural block diagram of an ultrasonic water dispenser according to an embodiment of the present application.

Detailed ways

The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, but not to limit the present application.

It should be noted that if there are directional indications (such as up, down, left, right, front, back, etc.) involved in the embodiments of the present application, the directional indications are only used to explain a certain posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly.

In addition, if there are descriptions related to "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for the purpose of description, and should not be construed as indicating or implying Its relative importance or implicitly indicates the number of technical features indicated. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In addition, the technical solutions between the various embodiments can be combined with each other, but must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of such technical solutions does not exist. , is not within the scope of protection claimed in this application.

In the existing ultrasonic water dispenser, the ultrasonic probe used to transmit and receive ultrasonic signals is the core component of the whole system, and its working quality directly determines the function of the system. The ultrasonic probe is an electronic component with a certain lifespan, because the water-out and water-off action of the machine is completely determined by the ultrasonic signal. If the ultrasonic probe cannot work or cannot work stably, the entire system will fail to identify, resulting in a water dispenser error. Actions. Therefore, it is necessary that the ultrasonic probe can be detected in time in the event of failure to avoid a larger accident.

In order to overcome the failure of the ultrasonic probe of the ultrasonic water dispenser in the prior art to be detected in time, the present application provides a fault detection method for an ultrasonic water dispenser.

FIG. 1 schematically shows a schematic flowchart of a fault detection method for an ultrasonic water dispenser according to an embodiment of the present application. As shown in FIG. 1, in the embodiment of the present application, a fault detection method for an ultrasonic water dispenser is provided, and the method may include the following steps:

Step 101: control the ultrasonic probe to transmit a detection signal;

Step 102: acquiring an echo signal curve corresponding to the detection signal;

Step 103: Determine whether the ultrasonic probe is faulty according to the echo signal curve.

FIG. 2 schematically shows a schematic diagram of an echo signal generation mechanism according to an embodiment of the present application. As shown in FIG. 2 , it can be understood that the detection signal is an ultrasonic signal, and the echo signal is the ultrasonic signal passing through the object after the ultrasonic probe sends out the ultrasonic signal. The signal received after reflection, the echo signal curve reflects the change of the echo signal.

In an embodiment of the present application, for example, the processor may acquire multiple echo signal curves received by multiple ultrasonic probes, and the specific number may be set according to the actual situation. Further, the processor may acquire and store the echo signal when the ultrasonic probe receives the echo signal, and generate the echo signal curve. FIG. 3 schematically shows a schematic diagram of an echo signal curve in a case where there is no water receiving platform according to an embodiment of the present application. As shown in FIG. 3 , the echo signal curve can be divided into a transmitting area and a receiving area, which respectively represent the transmitting time period of the ultrasonic signal and the receiving time period waiting to receive the reflected signal.

In an embodiment of the present application, step 101 may include:

Control any ultrasonic probe among the plurality of ultrasonic probes to transmit a detection signal.

Specifically, in one example, the processor may control the ultrasonic probe to transmit detection signals periodically, for example, to transmit detection signals every 2 hours for detection. In another example, the processor may control the ultrasonic probe to transmit a detection signal after a preset time period after the completion of the water connection, for example, to send a detection signal for detection 1 hour after the completion of the water connection. In yet another example, the processor may control the ultrasonic probe to emit a detection signal within a predetermined period of time, for example, using the timing module integrated in the ultrasonic water dispenser to determine whether the time is late at night (for example, from 0:00 to 5:00), and control when no one is using it in the middle of the night. The ultrasonic probe transmits a detection signal for detection.

In an embodiment of the present application, the ultrasonic probe completes the fault detection by means of self-checking, that is, the transmission and reception of ultrasonic signals are both completed by one ultrasonic probe. In the case of the self-checking of the ultrasonic probe, step 102 may include:

Control the ultrasonic probe that transmits the detection signal to obtain the echo signal curve.

In another embodiment of the present application, the ultrasonic probes complete fault detection in a mutual inspection manner, that is, one ultrasonic probe sends a detection signal, and the other ultrasonic probe receives an echo signal. multiple rounds of judgment. In the case of mutual inspection of ultrasonic probes, step 102 includes:

Control other ultrasonic probes that do not transmit detection signals among the plurality of ultrasonic probes to obtain echo signal curves.

FIG. 4 schematically shows a schematic diagram of an echo signal curve in a mutual inspection state of ultrasonic probes according to an embodiment of the present application. As shown in FIG. 4 , the echo signal curve obtained during mutual inspection of ultrasonic probes is due to the existence of signal detection. For the blind area, the time domain length of the emission area is narrower than the time domain length of the emission area of the echo signal curve obtained during the self-check of the ultrasonic probe.

In an embodiment of the present application, step 103 includes:

Step 310: Compare the characteristics of the echo signal curve with the standard echo signal curve, and determine whether the ultrasonic probe is faulty according to the comparison result.

Specifically, the standard echo signal curve is obtained in an initialized working state of the ultrasonic probe, that is, the standard echo signal curve is obtained in a working state in which the ultrasonic probe does not have any degradation. As an electrical component with a certain lifespan, the ultrasonic probe is in an initialized working state when the ultrasonic water dispenser just leaves the factory or when the ultrasonic water dispenser is replaced with a new ultrasonic probe. The ultrasonic probe has not undergone any degradation, and its working state For the standard working state without any failure, the echo signal curve in this standard working state is obtained as the standard echo signal curve for the processor to compare and judge whether the ultrasonic probe fails.

FIG. 6 schematically shows a flow chart of comparing the characteristics of an echo signal curve with a standard echo signal curve to determine whether a fault occurs according to an embodiment of the present application. As shown in FIG. 6 , in an implementation of the present application In an example, step 300 includes:

Step 311: Extract the time domain length from the beginning of the echo signal curve to the peak value of the receiving area from the echo signal curve;

Step 312: If the time domain length and the standard echo signal curve cannot match the time domain length from the beginning of the standard echo signal curve to the peak value of the receiving area, it is determined that the ultrasonic probe is faulty.

Specifically, FIG. 5 schematically shows a schematic diagram of an echo signal curve in the case of a water receiving platform according to an embodiment of the present application. As shown in FIG. 5 , because the ultrasonic probe of the water dispenser is relative to the ground or the water receiving platform or other similar signal obstacles have a physically fixed height, which is a parameter determined when the ultrasonic water dispenser leaves the factory. After the detection signal emitted by the ultrasonic probe is reflected by the signal obstacle and received by the ultrasonic probe, the A protruding peak appears in the echo signal curve, that is, the receiving area, and the time domain length L that the ultrasonic probe passes through when the peak is received can indirectly express the height of the ultrasonic probe relative to the signal obstacle. Add the time domain length L ₀ from the beginning of the curve in the standard echo signal to the peak value of the receiving area in the processor, and set a certain error value ΔL according to the quality standard of the probe designed by the water dispenser. If the time domain obtained by the echo signal curve If the value of the length L is within the range of L ₀ ±ΔL, it can be judged that the ultrasonic probe has not failed. If its value is not within the range of L ₀ ±ΔL, it can be determined that the ultrasonic probe has failed, and the ultrasonic probe can be controlled at this time. The water dispenser enters the lock protection mode, and/or issues a prompt, that is, step 104:

When it is determined that the ultrasonic probe is faulty, the ultrasonic water dispenser is controlled to enter the lock protection mode, and/or a prompt is issued.

FIG. 7 schematically shows another schematic flowchart of comparing the characteristics of the echo signal curve with the standard echo signal curve to determine whether a fault occurs according to an embodiment of the present application. As shown in FIG. 7 , in another aspect of the present application In one embodiment, fault detection and judgment may be performed by using other curve features in the echo signal curve except for the time domain length experienced by reaching the peak value of the receiving area, and step 300 may include:

Step 321: Extract the time domain length of the transmitting area, the amplitude of the transmitting area and the amplitude of the receiving area from the echo signal curve;

Step 322: If the time domain length of the transmitting area, the amplitude of the transmitting area and the amplitude of the receiving area of the echo signal curve cannot all be matched with the time domain length of the transmitting area, the amplitude of the transmitting area and the amplitude of the receiving area of the standard echo signal curve , it is determined that the ultrasonic probe is faulty.

Fig. 3 schematically shows a schematic diagram of an echo signal curve without a water receiving platform according to an embodiment of the present application. In an embodiment of the present application, as shown in Fig. 3, the processor can extract the emission area Time domain length X, transmitting area amplitude Y1 and receiving area amplitude Y2, compare X, Y1, Y2 with the transmitting area time domain length X0, transmitting area amplitude Y10 and receiving area amplitude Y20 of the standard echo signal curve respectively. Corresponding to matching, if the corresponding matching cannot be achieved, it is determined that the ultrasonic probe is faulty, that is, the above-mentioned step 104 is entered.

It is worth noting that the acquisition of the standard signal echo curve can be completed before the ultrasonic water dispenser leaves the factory or when the water dispenser performs probe replacement. processor for comparison matching.

Optionally, the first threshold, the second threshold and the third threshold can be set by using the time domain length X0 of the transmitting area, the amplitude Y10 of the transmitting area and the amplitude Y20 of the receiving area while retaining a certain error tolerance, and the obtained The time domain length X of the transmitting area, the amplitude Y1 of the transmitting area and the amplitude Y2 of the receiving area of the echo signal curve are respectively matched with the first threshold, the second threshold and the third threshold. If they cannot all match, determine the ultrasonic probe. malfunction.

FIG. 8 schematically shows another schematic flowchart of comparing the characteristics of an echo signal curve with a standard echo signal curve to determine whether a fault has occurred according to an embodiment of the present application. In another embodiment of the present application, such as As shown in FIG. 8, step 300 may include:

Step 331: Calculate the fitting degree of the echo signal curve and the standard echo signal curve;

Step 332: If the degree of fit does not meet the preset standard, it is determined that the ultrasonic probe is faulty.

Specifically, the processor can save the entire standard echo signal curve, calculate the degree of fit between the acquired echo signal curve and the standard echo signal curve, and if the degree of fit does not meet the preset standard, it is determined that the ultrasonic probe is faulty . Optionally, the degree of fit between the acquired echo signal curve and the standard echo signal curve can be calculated by using the residual sum of squares, and each time point x ₁ , x ₂ , and x ₃ of the acquired echo signal curve is calculated. ......The corresponding signal values y ₁ , y ₂ , y ₃ ...... and the standard echo signal curve each time point x ₁ , x ₂ , x ₃ ...... Corresponding signal values y ₁₀ , y ₂₀ , y ₃₀ ...... perform difference calculation (y ₁ -y ₁₀ ), (y ₂ -y ₂₀ ), (y ₃ -y ₃₀ )..... ., add the squares of each difference obtained by calculation to obtain the residual sum of squares. The larger the residual sum of squares, the worse the fitting. If the residual sum of squares is not below a preset threshold, it can be determined The ultrasonic probe is malfunctioning.

It is worth noting that in the actual detection process, the intensity of the echo signal will attenuate with time, and this attenuation manifested in the echo signal curve will cause a certain error in the calculation of the degree of fit. When setting the preset standard of fit, technicians need to consider the error caused by the echo signal attenuation, or set the range of the curve to be fitted (such as the detection signal when performing curve fitting). The echo curve obtained within 150ms after transmission), to avoid excessive fitting error due to excessive attenuation of the echo signal due to too long time. How the technical personnel specifically performs the above setting to avoid the calculation error of the fitting degree can be designed according to product requirements, which is not limited in this application.

In an embodiment of the present application, an ultrasonic water dispenser is provided. FIG. 9 schematically shows a structural block diagram of an ultrasonic water dispenser according to an embodiment of the present invention. As shown in FIG. 9 , the water dispenser includes: at least one ultrasonic probe 710 and processor 720, wherein: the processor 720 is configured to: control the ultrasonic probe to transmit a detection signal; acquire an echo signal curve corresponding to the detection signal; and determine whether the ultrasonic probe fails according to the echo signal curve.

In one embodiment, the processor 720 is further configured to: determine the height detected by the ultrasonic probe according to the echo signal curve; compare the detected height with the preset height; and determine whether the ultrasonic probe fails according to the comparison result.

In one embodiment, the processor 720 is further configured to: extract the time domain length of the emission region, the amplitude of the emission region and the amplitude of the reception region from the echo signal curve; If the amplitude value of the area and the amplitude value of the receiving area cannot correspond to the time domain length of the transmitting area, the amplitude value of the transmitting area and the amplitude value of the receiving area of the standard echo signal curve, it is determined that the ultrasonic probe is faulty.

In one embodiment, the processor 720 is further configured to: calculate the fitting degree of the echo signal curve and the standard echo signal curve; if the fitting degree does not meet the preset standard, it is determined that the ultrasonic probe is faulty.

The above ultrasonic water dispenser transmits ultrasonic signals through ultrasonic probes during self-inspection or mutual inspection to obtain echo signal curves, determines the height detected by the ultrasonic probe according to the echo signal curve, and judges the ultrasonic probe by comparing the detected height with the preset height. Whether there is a fault; or by judging whether the relevant parameters of the echo signal curve correspond to the relevant parameters of the standard echo signal curve obtained when the ultrasonic probe works normally, to judge whether the ultrasonic probe is faulty; or by the echo signal curve and the standard echo signal curve. The fitting value of the echo signal curve determines whether the ultrasonic probe is faulty. Through the above fault detection method, the failure of the ultrasonic probe can be detected in time, and remedial measures can be completed in time to avoid larger accidents.

In an embodiment of the present application, there is provided a processor configured to execute the fault detection method for an ultrasonic water dispenser according to the above embodiment.

An embodiment of the present invention provides a machine-readable storage medium, where instructions are stored on the machine-readable storage medium, the instructions, when executed by a processor, cause the processor to execute the fault for the ultrasonic water dispenser according to the above embodiment Detection method.

The present application also provides a computer program product, including a computer program, which, when executed by a processor, implements the fault detection method for an ultrasonic water dispenser according to the above embodiment.

As will be appreciated by those skilled in the art, the embodiments of the present application may be provided as a method, a system, or a computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present application. It will be understood that each process and/or block in the flowchart illustrations and/or block diagrams, and combinations of processes and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to the processor of a general purpose computer, special purpose computer, embedded processor or other programmable data processing device to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing device produce Means for implementing the functions specified in a flow or flow of a flowchart and/or a block or blocks of a block diagram. These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory result in an article of manufacture comprising instruction means, the instructions The apparatus implements the functions specified in the flow or flow of the flowcharts and/or the block or blocks of the block diagrams. These computer program instructions can also be loaded on a computer or other programmable data processing device to cause a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process such that The instructions provide steps for implementing the functions specified in the flow or blocks of the flowcharts and/or the block or blocks of the block diagrams.

In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.

Memory may include non-persistent memory in computer readable media, random access memory (RAM) and/or non-volatile memory in the form of, for example, read only memory (ROM) or flash memory (flash RAM). Memory is an example of a computer-readable medium.

Computer-readable media includes both persistent and non-permanent, removable and non-removable media, and storage of information may be implemented by any method or technology. Information may be computer readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read only memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), Flash Memory or other memory technology, Compact Disc Read Only Memory (CD ROM), Digital Versatile Disc (DVD) or other optical storage, magnetic Magnetic tape cartridges, magnetic tape storage or other magnetic storage devices or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, computer-readable media does not include transitory computer-readable media, such as modulated data signals and carrier waves.

It should also be noted that the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device comprising a series of elements includes not only those elements, but also Other elements not expressly listed, or which are inherent to such a process, method, article of manufacture, or apparatus are also included. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in the process, method, article of manufacture or apparatus that includes the element.

The above are merely examples of the present application, and are not intended to limit the present application. Various modifications and variations of this application are possible for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the scope of the claims of this application.

Claims (11)

1. A fault detection method for an ultrasonic water dispenser, wherein the ultrasonic water dispenser comprises an ultrasonic probe, and is characterized by comprising the following steps:

controlling the ultrasonic probe to transmit a detection signal;

acquiring an echo signal curve corresponding to the detection signal;

and determining whether the ultrasonic probe has a fault according to the echo signal curve.

2. The method of claim 1, wherein the determining whether the ultrasonic probe is malfunctioning based on the echo signal profile comprises:

comparing the characteristics of the echo signal curve with a standard echo signal curve, and judging whether the ultrasonic probe has a fault according to a comparison result;

wherein the standard echo signal curve is obtained in an initial operating state of the ultrasonic probe.

3. The method according to claim 2, wherein the comparing the echo signal curve with a standard echo signal curve, and the determining whether the ultrasonic probe has a fault according to the comparison result comprises:

extracting the time domain length from the beginning of the echo signal curve to the peak value of the receiving area from the echo signal curve;

and if the time domain length cannot be matched with the time domain length from the beginning of the standard echo signal curve to the peak value of the receiving area in the standard echo signal curve, determining that the ultrasonic probe has a fault.

4. The method according to claim 2, wherein the comparing the echo signal curve with a standard echo signal curve, and the determining whether the ultrasonic probe has a fault according to the comparison result comprises:

extracting a transmitting region time domain length, a transmitting region amplitude and a receiving region amplitude from the echo signal curve;

and if the transmitting area time domain length, the transmitting area amplitude and the receiving area amplitude of the echo signal curve cannot be matched with the transmitting area time domain length, the transmitting area amplitude and the receiving area amplitude of the standard echo signal curve correspondingly, determining that the ultrasonic probe fails.

5. The method of claim 2, wherein the comparing the echo signal curve with a standard echo signal curve, and the determining whether the ultrasonic probe is faulty according to the comparison result comprises:

determining the fitting degree of the echo signal curve and a standard echo signal curve;

and if the fitting degree does not reach the preset standard, determining that the ultrasonic probe fails.

6. The fault detection method according to claim 1, wherein the ultrasonic probe includes a plurality of ultrasonic probes;

the controlling the ultrasonic probe to transmit the detection signal comprises: controlling any one of the plurality of ultrasonic probes to emit a detection signal;

the acquiring of the echo signal curve corresponding to the detection signal includes: and controlling other ultrasonic probes which do not emit detection signals in the plurality of ultrasonic probes to acquire the echo signal curve.

7. The fault detection method according to claim 1, wherein the controlling the ultrasonic probe to emit the probe signal includes:

the ultrasonic probe is controlled to transmit detection signals periodically;

controlling the ultrasonic probe to transmit a detection signal after the preset duration of water receiving is finished; and/or

And controlling the ultrasonic probe to transmit a detection signal in a preset time period.

8. The fault detection method of claim 1, further comprising:

and under the condition that the ultrasonic probe is determined to be in fault, controlling the ultrasonic water dispenser to enter a locking protection mode and/or sending out a prompt.

9. A processor, characterized in that the processor is configured to execute the fault detection method for an ultrasonic water dispenser according to any one of claims 1 to 8.

10. An ultrasonic water dispenser comprising at least one ultrasonic probe, and a processor configured to perform the method for fault detection of an ultrasonic water dispenser according to any one of claims 1 to 8.

11. A machine readable storage medium having instructions stored thereon, wherein the instructions, when executed by a processor, cause the processor to implement the method of fault detection for an ultrasonic water dispenser according to any one of claims 1 to 8.

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