WO2021129165A1 - Procédé et appareil de marquage de crêtes d'ondes ultrasonores, support de stockage et procédé de détection - Google Patents

Procédé et appareil de marquage de crêtes d'ondes ultrasonores, support de stockage et procédé de détection Download PDF

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Publication number
WO2021129165A1
WO2021129165A1 PCT/CN2020/126096 CN2020126096W WO2021129165A1 WO 2021129165 A1 WO2021129165 A1 WO 2021129165A1 CN 2020126096 W CN2020126096 W CN 2020126096W WO 2021129165 A1 WO2021129165 A1 WO 2021129165A1
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Prior art keywords
data
cup
ultrasonic
height
peak
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PCT/CN2020/126096
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English (en)
Chinese (zh)
Inventor
范志恒
魏中科
全永兵
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佛山市顺德区美的饮水机制造有限公司
美的集团股份有限公司
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Priority claimed from CN201911336383.9A external-priority patent/CN113093194B/zh
Priority claimed from CN201911348086.6A external-priority patent/CN111007517A/zh
Priority claimed from CN201911424124.1A external-priority patent/CN113116153B/zh
Application filed by 佛山市顺德区美的饮水机制造有限公司, 美的集团股份有限公司 filed Critical 佛山市顺德区美的饮水机制造有限公司
Publication of WO2021129165A1 publication Critical patent/WO2021129165A1/fr

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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J31/00—Apparatus for making beverages
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
    • G01S15/06—Systems determining the position data of a target
    • G01S15/08—Systems for measuring distance only

Definitions

  • This application relates to the technical field of ultrasonic measurement, in particular to an ultrasonic wave peak marking method, a computer-readable storage medium, an ultrasonic wave peak marking device, an object height detection method, a water cup height measurement method, A water discharge control method based on the method for measuring the height of the water cup, a water discharge control device based on the water discharge control method, a method for detecting ultrasonic waves, a device for detecting ultrasonic waves, and a distance detection Equipment and a kind of drinking water equipment.
  • the principle of ultrasonic measurement is to transmit the signal through the transducer and read the reflected signal of the object received by the transducer, and then mathematically analyze the obtained reflected signal to obtain the specification data of the object, such as distance, height, etc.
  • the derivative of each point is obtained point by point. If the first derivative of the point is 0 and the second derivative is negative, then the point is determined to be a crest.
  • This technology involves very complex floating-point operations, and the computational complexity is high, which is not conducive to the application of micro-chip microcomputers.
  • This application aims to solve one of the technical problems in the related technology at least to a certain extent.
  • the first purpose of this application is to propose a method for labeling ultrasonic wave crests, so as to realize the simple and rapid labeling of the positions of the wave crests in the reflected signal, which is beneficial to be applied to various micro-processors.
  • the second purpose of the present application is to provide a computer-readable storage medium that implements the method for marking the ultrasonic wave peaks.
  • the third purpose of this application is to provide an ultrasonic wave peak marking device.
  • the fourth purpose of the present application is to propose a method for detecting the height of an object based on the method for labeling ultrasonic wave peaks.
  • the fifth purpose of the present application is to propose a method for measuring the height of a water cup based on the method for marking the ultrasonic wave peaks.
  • the sixth purpose of the present application is to propose a water outlet control method based on the method for measuring the height of the water cup.
  • the seventh objective of the present application is to provide a water outlet control device based on the water outlet control method.
  • the eighth purpose of this application is to propose a method for detecting ultrasonic waves.
  • the ninth purpose of this application is to provide a device for detecting ultrasonic waves.
  • the tenth purpose of this application is to provide a distance detection device.
  • the eleventh purpose of this application is to propose a drinking water device.
  • an embodiment of the first aspect of the present application proposes an ultrasonic wave peak marking method, characterized in that the marking method includes the following steps: acquiring an ultrasonic reflection signal received by an ultrasonic probe; detecting the ultrasonic reflection There are multiple data of equal size in the signal, and the first data in the multiple data is greater than the previous data adjacent to it, and the last data in the multiple data is greater than the next data adjacent to it; The peaks of the ultrasonic reflected signals are marked according to the number of equal data.
  • the ultrasonic reflection signal received by the ultrasonic probe is first acquired, and then the signal is detected. It is detected that there are multiple data of equal size in the signal, and the first of the multiple data If a piece of data is larger than its adjacent previous piece of data, and the last piece of data is larger than its adjacent piece of data, the ultrasonic reflection signal can be marked with peaks based on the number of equal data. Therefore, the labeling method can easily and quickly obtain the position of the wave crest in the reflected signal, which is beneficial to be applied to various microprocessors and has a wide range of applications.
  • the method for labeling ultrasonic wave peaks may also have the following additional technical features:
  • the marking the peaks of the ultrasonic reflection signal according to the quantity of equal data includes: detecting that the quantity of the equal data is an odd number; marking the data in the middle position among the plurality of data as crest.
  • the marking the wave peaks of the ultrasonic reflection signal according to the number of equal data includes: detecting that the number of equal data is an even number; and comparing with the first data of the plurality of data The adjacent previous data is compared with the next data adjacent to the last data in the plurality of data; and the wave peak of the ultrasonic reflected signal is marked according to the comparison result.
  • the marking the peaks of the ultrasonic reflection signal according to the comparison result includes: detecting that the previous data adjacent to the first data of the plurality of data is larger than that of the plurality of data.
  • the last data in the data is adjacent to the next data, and the next data in the middle two adjacent data in the plurality of data is marked as a peak; or, the first data in the plurality of data is detected
  • the previous data adjacent to the data is smaller than the next data adjacent to the last data in the plurality of data, and the previous data in the middle two adjacent data in the plurality of data is marked as a crest; or , It is detected that the previous data adjacent to the first data in the multiple data is equal to the next data adjacent to the last data in the multiple data, and the middle two of the multiple data are Any one of the adjacent data is marked as a wave crest.
  • the labeling method further includes: detecting that there is target data larger than the adjacent previous data and larger than the adjacent next data in the ultrasonic reflected signal; labeling the target data as a peak .
  • an embodiment of the second aspect of the present application proposes a computer-readable storage medium, which, when the computer program is executed by a processor, implements the method for labeling ultrasonic wave peaks as described in the foregoing embodiment.
  • the ultrasonic wave peak marking method described in the above embodiment can be realized by executing the program stored therein corresponding to the ultrasonic wave peak marking method described in the above embodiment, so that it can be obtained simply and quickly.
  • the position of the wave crest in the reflected signal is beneficial to be applied to various micro-processors and has a wide range of applications.
  • an embodiment of the third aspect of the present application proposes an ultrasonic wave peak marking device.
  • the marking device includes: an acquisition module for acquiring ultrasonic reflection signals received by an ultrasonic probe; and a detection module for detecting the Whether there are multiple data of equal size in the ultrasonic reflection signal, and the first data of the multiple data is larger than the previous data adjacent to it, and the last data of the multiple data is larger than the next adjacent data A data; a labeling module for labeling the peaks of the ultrasonic reflected signal according to the number of equal data.
  • the ultrasonic reflection signal received by the ultrasonic probe is first acquired through the acquisition module; then the detection module is used to detect whether there are multiple data of equal size in the reflection signal, and The first data in the data is greater than the previous data adjacent to it, and the last data is greater than the next data adjacent to it; finally, the labeling module is used to label the wave peaks of the ultrasonic reflection signal according to the number of equal data. Therefore, the marking device can easily and quickly obtain the position of the wave crest in the reflected signal, which is beneficial to be applied to various microprocessors and has a wide range of applications.
  • the labeling module is specifically configured to: detect that the number of equal data is an odd number; and label the data in the middle position among the multiple data as peaks.
  • the labeling module is specifically configured to: detect that the number of equal data is an even number; and add the previous data adjacent to the first data of the multiple data to the multiple data. The last data in the data is compared with the next data next; and the peak of the ultrasonic reflected signal is marked according to the comparison result.
  • the embodiment of the fourth aspect of the present application proposes a method for detecting the height of an object.
  • the detection method includes the following steps: using an ultrasonic probe to receive the ultrasonic reflection signal reflected by the object;
  • the labeling method is to label the wave crests of the ultrasonic reflection signal; calculate the height of the object according to the labelled wave crests.
  • the ultrasonic wave peak marking method of the above embodiment can easily and quickly obtain the position of the wave peak in the reflected signal, thereby accurately and quickly obtaining the object height, which is beneficial to various micro-processing applications.
  • an embodiment of the fifth aspect of the present application proposes a method for measuring the height of a water cup, and the measuring method includes:
  • the extraction of the cup height is obtained by matching the cup model algorithm based on the calculation of the wave crest position, that is, the interference items of the crest can be checked, and the mathematical model of the crest belonging to the cup characteristic can be established, thereby Determine which wave crest is the cup height, which wave crest is the interference item, which wave crest is the liquid level, and which wave crest is the water receiving station, so as to improve the measurement accuracy and reliability.
  • the method for measuring the height of the water cup according to the embodiment of the present application also has the following additional technical features:
  • the water cup before determining whether any of the peaks of the cup height curve is greater than a preset threshold, determine whether the water cup is a regular water cup: if so, calculate the cup height according to the peaks of the cup height curve; Otherwise, the cup height is calculated based on the average value of the peaks of the cup height curve.
  • the method for measuring the height of the water cup further includes: judging whether the water cup is a regular water cup: if so, the cup height is calculated according to the peak of the cup height curve; otherwise, the cup height is calculated according to the height of the cup height curve. Calculate the cup height by the average of the peaks
  • the cup is a regular cup according to the following conditions: the peak of the cup height curve is within the cup height range and the peak of the cup height curve is greater than the preset threshold and the cup The number of peaks of the high curve is 1.
  • the water cup is not a regular water cup according to the following conditions: the crest of the cup height curve is within the cup height range and the crest of the cup height curve is greater than the preset threshold and the cup The number of peaks of the high curve is 2.
  • an embodiment of the sixth aspect of the present application proposes a water effluent control method, and the water effluent control method includes:
  • the above-mentioned method for measuring the height of the water cup is used with high accuracy and reliability.
  • an embodiment of the seventh aspect of the present application proposes a water output control device based on the water output control method described in the above embodiment, the water output control device includes: a transmitting module, the transmitting module is used to transmit an ultrasonic signal; Receiving module, the receiving module is used to receive the reflected signal of the object and perform detection processing on the reflected signal; the control module, the control module communicates with the transmitting module and the receiving module respectively; the output module, the output The module is used to control whether water is discharged according to the instruction of the control module.
  • the water discharge control method described above can be used to accurately discharge water and stop water.
  • an embodiment of the eighth aspect of the present application proposes a method for detecting ultrasonic waves, including: according to the method for labeling ultrasonic wave peaks in the foregoing embodiment; determining the peak value in the ultrasonic signal; Generate a detection curve.
  • the ultrasonic signal is acquired, the peak value of the acquired ultrasonic signal is determined, and the detection curve is finally generated according to the peak value.
  • the sawtooth phenomenon generated in the detection process of the hardware detection circuit in the prior art is avoided, the generated detection curve is smooth, and the accuracy of the detection curve is improved.
  • determining the peak value in the ultrasonic signal includes: obtaining the AD value in the ultrasonic signal; and determining the peak value according to the AD value.
  • determining the peak value according to the AD value includes: traversing the AD value; determining the AD value that is greater than the previous AD value and the next AD value as the peak value.
  • generating the detection curve according to the peak value includes: connecting the peak values with a line to generate the detection curve.
  • the method further includes: determining interference data in the peak; and generating a detection curve after removing the interference data from the peak.
  • an embodiment of the ninth aspect of the present application proposes a device for detecting ultrasonic waves.
  • the device includes: an ultrasonic probe for detecting ultrasonic signals; Ultrasound method.
  • the processor obtains the ultrasonic signal through the ultrasonic probe, and determines to obtain the ultrasonic signal, and finally generates a detection curve according to the peak value.
  • the sawtooth phenomenon generated in the detection process of the hardware detection circuit in the prior art is avoided, the generated detection curve is smooth, and the accuracy of the detection curve is improved.
  • the device further includes an amplifier, the input end of the amplifier is connected to the output end of the ultrasonic probe, and the output end of the amplifier is connected to the processor to amplify the ultrasonic signal and then input it into the processor.
  • an embodiment of the tenth aspect of the present application proposes a distance detection device.
  • the distance detection device includes an ultrasonic transmitting device and the above-mentioned device for detecting ultrasonic waves.
  • the ultrasonic signal emitted by the ultrasonic transmission device can be detected relatively accurately, thereby improving the detection accuracy of the object size.
  • an embodiment of the eleventh aspect of the present application proposes a drinking water device, which includes the above-mentioned distance detection device.
  • the height of the water cup can be accurately detected by the detection device, so that when the user uses the water drinking device, the corresponding appropriate liquid volume is determined, and the height of the water cup can automatically output a suitable liquid volume to prevent overflow.
  • FIG. 1 is a flowchart of a method for labeling ultrasonic wave peaks according to an embodiment of the present application
  • FIG. 2 is a schematic diagram of a two-dimensional energy curve of an ultrasonic reflected signal according to an embodiment of the present application
  • Fig. 3 is a schematic diagram of a reflected signal of an example of the present application.
  • Fig. 4 is a schematic diagram of a reflected signal of another example of the present application.
  • Fig. 5 is a schematic diagram of a reflected signal of another example of the present application.
  • FIG. 6 is a schematic diagram after marking the peaks of the two-dimensional energy curve of the ultrasonic reflected signal according to the embodiment of the present application.
  • Fig. 7 is a structural block diagram of an ultrasonic wave peak marking device according to an embodiment of the present application.
  • FIG. 8 is a flowchart of a method for detecting the height of the liquid level in a water heater according to an embodiment of the present application
  • Fig. 9 is a flowchart of a method for measuring the height of a water cup according to an embodiment of the present application.
  • Figure 10 is a schematic structural diagram of a water outlet control device according to an embodiment of the present application.
  • FIG. 11 is a schematic diagram of the cup height curve after detection according to the first embodiment of the present application.
  • FIG. 12 is a schematic diagram of the cup height curve after extraction according to the first embodiment of the present application.
  • FIG. 13 is a schematic diagram of the cup height curve after extraction according to the second embodiment of the present application.
  • Fig. 16 is a flowchart of a method for measuring the height of a water cup according to another embodiment of the present application.
  • FIG. 17 schematically shows a flowchart of a method for detecting ultrasonic waves according to an embodiment of the present application
  • FIG. 18 schematically shows a schematic diagram of the waveform of an ultrasonic signal
  • 19a and 19b schematically show the waveform diagrams of the detection signal output by the existing hardware detection circuit and the detection signal output by the detection method according to the embodiment of the present application;
  • FIG. 20 schematically shows a block diagram of an apparatus for detecting ultrasonic waves according to an embodiment of the present application
  • FIG. 21 schematically shows a simplified schematic circuit diagram of the device of the preferred embodiment of the present application.
  • Fig. 22 schematically shows a waveform diagram of an ultrasonic signal and a detection output of the prior art detection output.
  • the labeling device 1000 the acquisition module 100, the detection module 200, and the labeling module 300;
  • Receiving module 20 amplifying circuit 21, filter circuit 22, detection circuit 23,
  • Control module 30 excitation control area 31, mode control area 32, gain control area 33, synchronous sampling area 34, waveform analysis area 35, interface judgment area 36, abnormal diagnosis area 37,
  • Ultrasonic probe 501 processor 502, isolation device 503, amplifier 504.
  • Fig. 1 is a flowchart of a method for labeling ultrasonic wave peaks according to an embodiment of the present application.
  • the labeling method includes the following steps:
  • the ultrasonic probe can be selected to emit sound waves to the range that it can radiate. Since the ultrasonic wave will be reflected as soon as it encounters an obstacle, the probe will receive reflected signals from all directions.
  • the received reflection signals can be spliced to obtain a two-dimensional energy curve with x, y axis as the unit. The x-axis represents time, and the y-axis represents the energy size array of the received acoustic signal.
  • the ultrasonic probe receives the ultrasonic reflected signal, it detects the reflected signal to detect whether there are multiple data of equal size in the reflected signal, and among the multiple data, the first data is greater than the previous adjacent data. The last data is greater than the next data adjacent to it.
  • the ultrasonic reflected signal is labeled according to the number, so that all the peaks in the reflected signal can be labeled simply and quickly.
  • This labeling method is beneficial to application It has a wide range of applications in all kinds of microprocessors. Among them, there are two cases of odd and even numbers of equal data.
  • the data in the middle position among the multiple data is marked as a peak; when the number of equal data is detected as an even number, it will be compared with multiple data.
  • the previous data adjacent to the first data in the data is compared with the next data adjacent to the last data in the multiple data, and the wave peak of the ultrasonic reflection signal is marked according to the comparison result.
  • the number of equal data is an odd number, namely f3, f4, and f5.
  • the odd number can be median processed, so that the data f4 in the middle position is marked as a peak; and when the number of equal data is an even number, because the value in the middle position of the even number cannot be obtained, the data adjacent to the two ends of the equal data can be further compared, that is, the first data adjacent to the multiple equal data
  • the previous data is compared with the next data adjacent to the last data among the multiple equal data, and the peak of the ultrasonic reflection signal is marked according to the comparison result.
  • marking the peak of the ultrasonic reflection signal according to the comparison result includes: detecting that the previous data adjacent to the first data among the multiple data is greater than and The last data in the data is adjacent to the next data, and the next data in the middle two adjacent data in the multiple data is marked as a peak; or, it is detected that it is similar to the first data in the multiple data.
  • the adjacent previous data is smaller than the next data adjacent to the last data in the multiple data, and the previous data in the middle two adjacent data in the multiple data is marked as a wave crest; or, it is detected that there are multiple
  • the previous data adjacent to the first data in the data is equal to the next data adjacent to the last data in the multiple data, and any one of the two adjacent data in the middle of the multiple data is marked as a peak .
  • the number of equal data is an even number, respectively f3 and f4, where the first data in the multiple data is adjacent to the previous data is f2, and the last data in the multiple data is f2.
  • the next adjacent data is f5.
  • the position of the wave crest can be determined according to the comparison result of f2 and f5, and the wave crest can be marked.
  • the method for labeling ultrasonic wave peaks may further include: detecting that there are multiple data of equal size in the ultrasonic reflection signal, and the last data of the multiple data is larger than the next data adjacent to it. , But there is no previous data adjacent to the first data in the multiple data, or the first data in the multiple data is greater than the previous data adjacent to it, but there is no previous data adjacent to the first data in the multiple data. The last data among the multiple data is adjacent to the next data; the ultrasonic reflection signal can still be marked with the peaks according to the same number of data.
  • the method for labeling the peaks can be the same as the labeling method when the number of equal data is odd. If the number of equal data is an even number, then any one of the two adjacent data in the plurality of data can be marked as a peak, or the number of the two adjacent data in the plurality of data can be marked as a peak. The data that does not have the adjacent previous data or the adjacent next data is marked as a peak.
  • the preset value can be set according to needs (such as the frequency of collecting data), for example, it can be a value greater than 6.
  • the method for labeling ultrasonic wave peaks may further include: detecting that there is target data in the ultrasonic reflection signal that is larger than the adjacent previous data and larger than the adjacent next data; and labeling the target data as a wave crest.
  • f4 is detected as the target data, where f4>f3, then the interval from f3 to f4 is an increasing interval; f4>f5, then the interval from f4 to f5 is a decreasing interval, with two peaks
  • the position of the inflection point of the interval change, then f4 is the position of the wave crest, and the target data is marked as the wave crest.
  • the ultrasonic wave peak marking method described in the embodiment of the present application is used to mark the wave peak of the ultrasonic reflected signal in FIG. 2 to obtain the peak marking result as shown in FIG. 6.
  • the method for labeling ultrasonic wave peaks in the embodiments of the present application can easily and quickly obtain the position of the wave peak in the reflected signal by comparing the size of the data.
  • This labeling method is beneficial to be applied to various micro-processors and has a wide range of applications. .
  • the present application also proposes a computer-readable storage medium on which a computer program is stored, and when the computer level is executed by a processor, the method for labeling ultrasonic wave peaks in the above-mentioned embodiments is realized.
  • the position of the wave peak in the reflected signal can be obtained simply and quickly, which is beneficial to be applied to various micro In the processor, the scope of application is wide.
  • Fig. 7 is a structural block diagram of an ultrasonic wave peak marking device according to an embodiment of the present application.
  • the device 1000 for labeling ultrasonic wave peaks includes: an acquisition module 100, a detection module 200, and a labeling module 300.
  • the acquiring module 100 is used to acquire the ultrasonic reflected signal received by the ultrasonic probe; the detecting module 200 is used to detect whether there are multiple data of equal size in the ultrasonic reflected signal, and the first data of the multiple data is larger than the adjacent one. The last data in the multiple data is greater than the next data next to it; the labeling module 300 is used to label the wave peaks of the ultrasonic reflection signal according to the number of equal data.
  • the angle at which the ultrasonic probe transmits and receives signals is selected according to actual usage conditions.
  • the ultrasonic probe can be selected to transmit and receive ultrasonic waves at an angle of 45°. Since the ultrasonic wave will be reflected when it encounters an obstacle, the acquisition module 100 can acquire the reflected signals from all directions received by the probe. Due to the influence of the environment and the law of ultrasonic reflection, there may be various data in the reflected signal.
  • the detection module 200 detects the reflection signal to detect whether there are multiple data of equal size in the reflection signal, and among the multiple data, the first one The data is greater than the previous data adjacent to it, and the last data is greater than the next data adjacent to it; the labeling module 300 is then used to label the peaks of the ultrasonic reflected signal according to the number of equal data, so that the reflected signal can be easily and quickly marked. Wave peaks are marked.
  • the marking device is suitable for application to various micro-processors and has a wide range of applications. Among them, there are two cases of odd and even numbers of equal data.
  • the data in the middle position among the multiple data may be marked as a peak; when the number of equal data detected is an even number , You can compare the previous data adjacent to the first data in the multiple data with the next data adjacent to the last data in the multiple data, and mark the peak of the ultrasonic reflection signal according to the comparison result .
  • the odd number when the number of equal data is an odd number, the odd number can be processed with a median value, so that the data in the middle position obtained is marked as a peak; and when the number of equal data is an even number, it is impossible to get the middle position of the even number.
  • the value of, the data adjacent to the two ends of the equal data can be further compared, that is, the previous data adjacent to the first data of the multiple equal data and the last data of the multiple equal data can be compared. The next data is compared, and the wave peak of the ultrasonic reflected signal is marked according to the comparison result.
  • marking the peak of the ultrasonic reflection signal according to the comparison result specifically includes: the detection module 200 detects the previous one adjacent to the first one of the multiple data. If the data is greater than the next data adjacent to the last data in the multiple data, the next data in the middle two adjacent data in the multiple data is marked as a peak; or, the detection module 200 detects that the data is related to the multiple data.
  • the previous data adjacent to the first data in the data is smaller than the next data adjacent to the last data in the multiple data, and the previous data in the middle two adjacent data in the multiple data is marked as a crest; Or, the detection module 200 detects that the previous data adjacent to the first data of the multiple data is equal to the next data adjacent to the last data of the multiple data, and compares the middle two of the multiple data with each other. Any one of the adjacent data is marked as a crest.
  • the number of equal data is an even number, respectively f3 and f4, where the first data in the multiple data is adjacent to the previous data is f2, and the last data in the multiple data is f2.
  • the next adjacent data is f5.
  • the position of the wave crest can be determined according to the comparison result of f2 and f5, and the wave crest can be marked.
  • the method for labeling ultrasonic wave peaks may further include: detecting that there are multiple data of equal size in the ultrasonic reflection signal, and the last data of the multiple data is larger than the next data adjacent to it. , But there is no previous data adjacent to the first data in the multiple data, or the first data in the multiple data is greater than the previous data adjacent to it, but there is no previous data adjacent to the first data in the multiple data. The last data among the multiple data is adjacent to the next data; the ultrasonic reflection signal can still be marked with the peaks according to the same number of data.
  • the method for labeling the peaks can be the same as the labeling method when the number of equal data is odd. If the number of equal data is an even number, then any one of the two adjacent data in the plurality of data can be marked as a peak, or the number of the two adjacent data in the plurality of data can be marked as a peak. The data that does not have the adjacent previous data or the adjacent next data is marked as a peak.
  • the preset value can be set according to needs (such as the frequency of collecting data), for example, it can be a value greater than 6.
  • the detection module 200 may also detect that there is target data in the ultrasonic reflection signal that is larger than the adjacent previous data and larger than the adjacent next data.
  • the labeling module 300 may label the target data as crest.
  • f4 is detected as the target data, where f4>f3, then the interval from f3 to f4 is an increasing interval; f4>f5, then the interval from f4 to f5 is a decreasing interval, with two peaks
  • the position of the inflection point of the interval change, then f4 is the position of the wave crest, and the target data is marked as the wave crest.
  • the ultrasonic wave peak marking device described in the embodiment of the present application is used to mark the wave peak of the ultrasonic reflected signal in FIG. 2 to obtain the peak marking result as shown in FIG. 6.
  • the ultrasonic wave peak marking device of the embodiment of the present application can easily and quickly obtain the position of the wave peak in the reflected signal by comparing the size of the data.
  • the marking device is beneficial to be applied to various micro-processors and has a wide range of applications. .
  • FIG. 8 is a flowchart of a method for detecting the height of an object according to an embodiment of the present application.
  • the detection method includes the following steps:
  • the above-mentioned object height detection method can be used to detect the height of the liquid level in the water receiving vessel (such as a cup) used for drinking equipment, the height of the water receiving vessel, and the like.
  • the object height detection method can also realize the detection of the object distance, for example, the distance between the current vehicle and the preceding or following vehicle; it can also realize the detection of obstacles.
  • the ultrasonic wave peak marking method in the above embodiment can realize the marking of the wave peak in the ultrasonic reflection signal reflected by the object, and then the object height can be detected according to the marked wave peak.
  • the detection method can easily and quickly obtain the position of the wave crest in the reflected signal, and then accurately and quickly obtain the height of the object, and the detection method is beneficial to be applied to various microprocessors.
  • the method for measuring the height of a water cup includes:
  • the ultrasonic probe is used to receive the ultrasonic reflection signal reflected by the water cup.
  • the height range of the glass to be collected is the height range of the glass to be collected.
  • the cup height range of the collected water cup includes:
  • a1 a0-H1
  • a2 a0-H2.
  • the peak X represents the mouth of the cup
  • the peak Y represents the bottom of the cup.
  • the abscissa of the bottom of the cup is about 260.
  • the abscissa interval (that is, the cup height range) that meets the properties of the cup is 60-195.
  • the area B between the two vertical dashed lines in the figure, and the area A represents the position of the probe, and the area C represents the position outside the water receiving platform. .
  • the preset threshold is the ordinate of the cup height curve.
  • the cup height is calculated based on the average value of the peaks of the cup height curve. In this way, the calculation result of the cup height is more accurate.
  • the water cup can be divided into two types according to the different structure of the water cup: one is an irregular water cup, such as a water cup with a threaded mouth, a stepped mouth, and a water cup with a handle; the other is a regular water cup, for example Glass cups, paper cups, etc. without obvious steps or threads.
  • an irregular water cup such as a water cup with a threaded mouth, a stepped mouth, and a water cup with a handle
  • the other is a regular water cup, for example Glass cups, paper cups, etc. without obvious steps or threads.
  • the water cup can be judged to be a regular water cup according to the following conditions:
  • the peak of the cup height curve is within the range of the cup height, the peak of the cup height curve is greater than the preset threshold, and the number of peaks of the cup height curve is 1.
  • the water cup is not a regular water cup according to the following conditions:
  • the peak of the cup height curve is within the range of the cup height, the peak of the cup height curve is greater than the preset threshold, and the number of peaks of the cup height curve is 2. It is worth noting that the peak of the cup height curve here refers to the peak that meets the aforementioned judgment conditions. For the peak that does not meet the aforementioned judgment conditions (excluding the judgment of the regular water cup), we consider it as an interference item and do not count the cup height. Calculating.
  • the average value of the peaks of the cup height curve is calculated according to the following formula:
  • H' (h1+h2)/2
  • h1 and h2 are the abscissas of the wave crests of two adjacent cup height curves, respectively.
  • cup height is calculated according to the following formula:
  • H a0-H'
  • H is the cup height
  • a minimum threshold value of the peak amplitude suitable for all cup models can be defined first, for example, the position of the dotted line in FIG. 14 is 1600 as shown. Therefore, only the peak greater than the preset threshold can be considered as a signal with a cup height, that is, the peak X', and the peak Z represents the interference term.
  • the wave crest Y'in the figure represents the bottom of the cup.
  • the two wave crests X'larger than the preset threshold are next to each other, so it conforms to the irregular threaded cup model, and the height is also calculated as the average of the two wave crests. .
  • the extraction of the cup height is obtained by matching the cup model algorithm based on the calculation of the wave crest position, that is, the interference items of the crest can be checked, and the mathematical model of the crest belonging to the cup characteristic can be established, thereby Determine which wave crest is the cup height, which wave crest is the interference item, which wave crest is the liquid level, and which wave crest is the water receiving station, so as to improve the measurement accuracy and reliability.
  • the judgment order of the several judgment conditions involved in this application can be in no particular order, as long as the final wave crest is the wave crest that meets the cup height range, is judged by the regular water cup, and the interference items are excluded. For example, as shown in FIG. 16, if there are wave crests greater than the preset threshold and less than 3 in the cup height range, the judgment of the regular water cup is performed.
  • the accuracy and reliability of the method for measuring the height of the water cup as described above are high.
  • the water discharge control device 1 based on the water discharge control method described in the foregoing embodiment includes: a transmitting module 10, a receiving module 20, a control module 30, and an output module 40.
  • the transmitting module 10 is used to transmit ultrasonic signals, and includes a first excitation circuit 11, a second excitation circuit 12 and a MUX module 13.
  • the receiving module 20 is used to receive the reflected signal of the object and perform detection processing on the reflected signal, and includes an amplifier circuit 21, a filter circuit 22 and a detection circuit 23.
  • the control module 30 communicates with the transmitting module 10 and the receiving module 20 respectively, and includes an excitation control area 31, a mode control area 32, a gain control area 33, a synchronous sampling area 34, a waveform analysis area 35, an interface judgment area 36 and an abnormal diagnosis area 37.
  • the output module 40 is used to control whether water is discharged according to the instruction of the control module.
  • the water discharge control method described above can be used to accurately discharge water and stop water.
  • the embodiment of the present application proposes a method for detecting ultrasonic waves.
  • FIG. 17 schematically shows a flowchart of a method for detecting ultrasound in an embodiment of the present application.
  • the method includes:
  • Step S100 the method for labeling ultrasonic wave peaks in the foregoing embodiment
  • Step S200 Determine the peak value in the ultrasonic signal
  • Step S300 Generate a detection curve according to the peak value.
  • the ultrasonic signal can be detected by the ultrasonic probe.
  • FIG. 18 schematically shows a schematic diagram of the waveform of an ultrasonic signal.
  • the ultrasonic signal is an envelope signal formed by a carrier of a certain frequency, and the carrier frequency is generally tens of KHz, such as 58KHz.
  • the ultrasonic signal includes a symmetrical envelope signal composed of a series of peaks and valleys.
  • B, D, F, G, and H are peaks
  • A, C, and E are valleys.
  • the waveform of is a waveform composed of peak points.
  • the carrier is generally filtered by the RC filter circuit based on the principle of RC charging and discharging, and the envelope signal is detected. This will cause the peaks to form a saw-tooth waveform interference signal due to the RC charging and discharging process, thus bringing There are interference data in the ultrasonic signal waveform after the detection, and the distortion of the operation detection waveform.
  • all the peaks in the above-mentioned ultrasonic signal are determined based on software, such as the peaks B, D, E, F, etc. in Figure 18, and then the detection signal is generated based on these peaks. Specifically, These peaks are connected in a line to form a line segment L as shown in FIG. 18, which is the detection curve of the last generated ultrasonic wave.
  • FIG. 19a and 19b schematically show the waveform diagrams of the detection signal output by the existing hardware detection circuit and the detection signal output by the detection method according to the embodiment of the present application. It can be clearly seen from Figure 19a that the detection signal contains a lot of sawtooths, which makes the detection curve not smooth and produces unnecessary errors relative to the original envelope signal.
  • the detection curve in Figure 19b has a smooth transition, which significantly reduces the error. Therefore, it has obvious advantages over hardware detection circuits.
  • ultrasonic signals are acquired, and the peak value of the acquired ultrasonic signal is determined, and finally a detection curve is generated according to the peak value.
  • the sawtooth phenomenon generated in the detection process of the hardware detection circuit in the prior art is avoided, the generated detection curve is smooth, and the accuracy of the detection curve is improved.
  • determining the peak value in the ultrasonic signal includes:
  • Step S210 Obtain the AD value in the ultrasonic signal
  • Step S220 Determine the peak value according to the AD value.
  • the voltage value of the ultrasonic signal can be read through the A/D (analog/digital) detection port of the processor, and converted into an AD (analog to digital) value, so as to convert all the voltage values in the ultrasonic signal All are converted into AD values, and the peak value is determined from these AD values.
  • the voltage values of all envelope signals including the upper and lower envelopes can be converted into AD values in the figure, including the voltage values from point A to point F, and then the peak value is determined from these AD values.
  • the specific plan for determining the peak value may include:
  • the AD value that is greater than the previous AD value and the next AD is determined as the peak value.
  • the AD value that is greater than the previous AD value and the next AD value among these AD values is determined as the peak value, such as the AD value greater than the A point and the C point AD
  • the AD value of point B with a large value can be determined as the peak value, and then the AD value of point D that is greater than the AD value of point C and the AD value of point E can be determined as the peak value, and then determine B, D, E, F, etc.
  • AD value is the peak value, and finally connecting these peak values to generate a detection curve.
  • the specific connection method can generate a line segment based on the coordinate values of every two points, such as generating a line segment based on the coordinate values of point B and point D to establish a functional relationship, so as to generate a line segment between all points in sequence to generate a detection curve.
  • the method further includes:
  • Step S400 Determine the interference data in the peak
  • Step S500 Generate a detection curve after removing the interference data from the peak value.
  • the interference data that may exist in the ultrasonic signal
  • these can be adjusted based on the range of the normal AD value.
  • the abnormal AD value is screened out, and finally the detection curve is generated, so as to realize the function of filtering interference while detecting, so that the accuracy of the detection curve is higher.
  • the embodiment of the present application also proposes a device for detecting ultrasonic waves.
  • Fig. 20 schematically shows a block diagram of an apparatus for detecting ultrasound in an embodiment of the present application.
  • the device includes: an ultrasonic probe 501 for detecting ultrasonic signals; and a processor 502 (MCU shown in FIG. 20), which is configured to implement the method for detecting ultrasonic waves in the foregoing embodiment.
  • MCU processor 502
  • Examples of the processor 502 may include, but are not limited to, a general-purpose processor, a special-purpose processor, a conventional processor, a digital signal processor (DSP), multiple microprocessors, one or more microprocessors associated with the DSP core, Controller, microcontroller, application specific integrated circuit (ASIC), field programmable gate array (FPGA) circuit, any other type of integrated circuit (IC), state machine, etc.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • the waveform of the ultrasonic probe 501 acquired from the ultrasonic probe 501 is as shown in FIG. 18.
  • the ultrasonic signal is an envelope signal formed by a carrier of a certain frequency, and the carrier frequency is generally tens of KHz, such as 58KHz.
  • the ultrasonic signal includes a symmetrical envelope signal composed of a series of peaks and valleys.
  • B, D, F, G, and H are peaks
  • A, C, and E are valleys.
  • the waveform of is a waveform composed of peak points.
  • the carrier is generally filtered by the RC filter circuit based on the principle of RC charging and discharging, and the envelope signal is detected. This will cause the peaks to form a saw-tooth waveform interference signal due to the RC charging and discharging process, thus bringing There are interference data in the ultrasonic signal waveform after the detection, and the distortion of the operation detection waveform.
  • the processor 502 determines all the peaks in the above-mentioned ultrasonic signal based on software, such as the peaks B, D, E, F, etc. in FIG. 18, and then generates the detection signal according to these peaks. Specifically, In other words, connecting these peaks into a line to form a line segment L as shown in FIG. 18 is the detection curve of the last generated ultrasonic wave.
  • FIG. 19a and 19b schematically show the waveform diagrams of the detection signal output by the existing hardware detection circuit and the detection signal output by the detection method according to the embodiment of the present application. It can be clearly seen from Figure 19a that the detection signal contains a lot of sawtooths, which makes the detection curve not smooth and produces unnecessary errors relative to the original envelope signal.
  • the detection curve in Figure 19b has a smooth transition, which significantly reduces the error. Therefore, it has obvious advantages over hardware detection circuits.
  • the processor 502 obtains the ultrasound signal through the ultrasound probe 501, determines to obtain the ultrasound signal, and finally generates a detection curve according to the peak value. In this way, the sawtooth phenomenon generated in the detection process of the hardware detection circuit in the prior art is avoided, the generated detection curve is smooth, and the accuracy of the detection curve is improved.
  • the processor 502 is further configured to: obtain the AD value in the ultrasonic signal; and determine the peak value according to the AD value.
  • the voltage value of the ultrasonic signal can be read through the A/D (analog/digital) detection port of the processor 502, and converted into an AD (analog to digital) value, so that all the voltages in the ultrasonic signal The values are all converted into AD values, and the peak value is determined from these AD values.
  • the voltage values of all envelope signals including the upper and lower envelopes can be converted into AD values in the figure, including the voltage values from point A to point F, and then the peak value is determined from these AD values.
  • the processor 502 is further configured to:
  • the AD value that is greater than the previous AD value and the next AD is determined as the peak value.
  • the AD value that is greater than the previous AD value and the next AD value among these AD values is determined as the peak value, such as the AD value greater than the A point and the C point AD
  • the AD value of point B with a large value can be determined as the peak value, and then the AD value of point D that is greater than the AD value of point C and the AD value of point E can be determined as the peak value, and then determine B, D, E, F, etc.
  • AD value is the peak value, and finally connecting these peak values to generate a detection curve.
  • the specific connection method can generate a line segment based on the coordinate values of every two points, such as generating a line segment based on the coordinate values of point B and point D to establish a functional relationship, so as to generate a line segment between all points in sequence to generate a detection curve.
  • the processor 502 is further configured to: determine the interference data in the peak; and generate a detection curve after removing the interference data from the peak.
  • the interference data that may exist in the ultrasonic signal
  • these can be adjusted based on the range of the normal AD value.
  • the abnormal AD value is screened out, and finally the detection curve is generated, so as to realize the function of filtering interference while detecting, so that the accuracy of the detection curve is higher.
  • FIG. 21 schematically shows a simplified circuit principle diagram of the device of the preferred embodiment of the present application.
  • the device further includes: an isolation device 503, the input end of the isolation device 503 is connected to the output end of the ultrasonic probe 501 to isolate the DC signal output by the ultrasonic probe 501.
  • the device further includes an amplifier 504, the input end of the amplifier 504 is connected to the output end of the ultrasonic probe, and the output end of the amplifier 504 is connected to the processor 502 to amplify the ultrasonic signal and then input it into the processor 502.
  • the aforementioned isolation device 503 includes a second resistor R2 and a first capacitor C1.
  • One end of the second resistor R2 is the input end of the isolation device 503, and the other end of the second resistor R2 is connected to one end of the second capacitor.
  • the other end of the two capacitors is the output end of the isolation device 503.
  • the amplifier 504 includes a third resistor R3, a comparator IC1, and a fourth resistor R4.
  • the inverting input terminal of the comparator IC1 is the input terminal of the amplifier 504, the non-inverting input terminal of the amplifier 504 is grounded, and both ends of the third resistor R3 are respectively connected to the inverting input terminal of the comparator IC1 and the output terminal of the comparator IC1.
  • One end of the four resistor R4 is connected to the output terminal of the comparator IC1, and the other end of the fourth resistor R4 is grounded.
  • the output terminal of the comparator IC1 is the output terminal of the amplifier 504.
  • the device further includes a first resistor R1, one end of the first resistor R1 is connected to an output end of the ultrasonic probe 501, the other end of the first resistor R1 is grounded, and the other output end of the ultrasonic probe 501 is grounded.
  • the ultrasonic signal of W2 shown in Fig. 22 output from the ultrasonic probe 501 is limited by the first resistor R1, and then isolated by the isolation circuit composed of the second resistor R2 and the first capacitor C1.
  • the AC component of the frequency signal passes through, and the output is a pure AC signal, which is input to the inverting input terminal of the comparator IC1, amplified by the discharge circuit composed of the third resistor R3 and the comparator IC1, and passed through the fourth resistor R4
  • the voltage is limited, it is input to an A/D port of the processor 502, and the voltage signal is sampled by the processor 502 and converted into an AD value.
  • the processor 502 stores the AD values of all received ultrasonic signals, and filters out all the peaks therein.
  • the traversal AD value can be used, and the AD value that is greater than the previous AD value and the next AD value among the AD values is determined as The peak scheme is filtered. And further determine the abnormally large or abnormally decreased value in the AD value as the interference signal to remove it, and finally establish a simple function based on the coordinate system of time as the X axis and voltage as the Y axis based on every two adjacent values.
  • the relational expression generates the line segment between these two points, and finally connects all the line segments to generate the detection curve.
  • the detection circuit of the embodiment of the present application adopts the software detection mode of the processor 502, and the generated detection curve is smooth, and there is no sawtooth interference in the detection curve output by the hardware detection circuit. Signal, and can further filter the interference signal in the ultrasonic signal, so as to improve the accuracy of the detection signal.
  • the embodiment of the present application also proposes a detection device for measuring the size of an object, including an ultrasonic transmitting device and the above-mentioned device for detecting ultrasonic waves.
  • a detection device for measuring the size of an object including an ultrasonic transmitting device and the above-mentioned device for detecting ultrasonic waves.
  • the embodiment of the present application also proposes a drinking water device, which includes the above-mentioned distance detection device.
  • the drinking water equipment includes one of a water dispenser, a beverage machine, and a coffee machine. These devices have a liquid outlet, and a liquid container such as a water cup can be placed under the liquid outlet to receive liquids such as water or beverages. Since the signal receiver of the device receives the reflected signal reflected by the object to be measured, the signal receiver and the signal transmitter can be arranged on the same side, and can be conveniently installed on one side of the drinking equipment.
  • the height of the water cup can be accurately detected by the detection device, so that when the user uses the drinking device, the corresponding appropriate liquid volume can be determined, and the height of the water cup can be automatically output with a suitable liquid volume to prevent overflow.
  • a "computer-readable medium” can be any device that can contain, store, communicate, propagate, or transmit a program for use by an instruction execution system, device, or device or in combination with these instruction execution systems, devices, or devices.
  • computer-readable media include the following: electrical connections (electronic devices) with one or more wiring, portable computer disk cases (magnetic devices), random access memory (RAM), Read only memory (ROM), erasable and editable read only memory (EPROM or flash memory), fiber optic devices, and portable compact disk read only memory (CDROM).
  • the computer-readable medium may even be paper or other suitable medium on which the program can be printed, because it can be used, for example, by optically scanning the paper or other medium, followed by editing, interpretation, or other suitable media if necessary. The program is processed in a manner to obtain the program electronically, and then stored in the computer memory.
  • each part of this application can be implemented by hardware, software, firmware, or a combination thereof.
  • multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system.
  • a suitable instruction execution system For example, if it is implemented by hardware, as in another embodiment, it can be implemented by any one or a combination of the following technologies known in the art: Discrete logic circuits, application specific integrated circuits with suitable combinational logic gates, programmable gate array (PGA), field programmable gate array (FPGA), etc.
  • first and second are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined with “first” and “second” may explicitly or implicitly include one or more of these features. In the description of the present application, “multiple” means two or more than two, unless otherwise specifically defined.
  • the terms “installed”, “connected”, “connected”, “fixed” and other terms should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , Or integrated; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements.
  • installed can be a fixed connection or a detachable connection , Or integrated; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements.
  • the first feature “on” or “under” the second feature may be in direct contact with the first and second features, or the first and second features may be indirectly through an intermediary. contact.
  • the "above”, “above” and “above” of the first feature on the second feature may mean that the first feature is directly above or diagonally above the second feature, or it simply means that the level of the first feature is higher than the second feature.
  • the “below”, “below” and “below” of the second feature of the first feature may mean that the first feature is directly below or obliquely below the second feature, or it simply means that the level of the first feature is smaller than the second feature.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Food Science & Technology (AREA)
  • Acoustics & Sound (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)

Abstract

Procédé et appareil de marquage de crêtes d'ondes ultrasonores, support de stockage et procédé de détection, le procédé de marquage consistant : à acquérir un signal réfléchi d'onde ultrasonore reçu par une sonde ultrasonore (S1) ; à détecter de multiples éléments de données de la même taille dans le signal réfléchi d'onde ultrasonore, un premier élément de données dans les multiples éléments de données étant plus grand que l'élément de données précédent adjacent à ce dernier, et l'élément de données final dans les multiples éléments de données étant plus grand que le dernier élément de données adjacent à ce dernier (S2) ; et, en fonction du nombre d'éléments de données de la même taille, à marquer les crêtes du signal réfléchi d'onde ultrasonore (S3).
PCT/CN2020/126096 2019-12-23 2020-11-03 Procédé et appareil de marquage de crêtes d'ondes ultrasonores, support de stockage et procédé de détection WO2021129165A1 (fr)

Applications Claiming Priority (6)

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CN201911336383.9 2019-12-23
CN201911336383.9A CN113093194B (zh) 2019-12-23 2019-12-23 超声波波峰的标注方法与装置、存储介质、检测方法
CN201911348086.6A CN111007517A (zh) 2019-12-24 2019-12-24 用于检测超声波的方法、装置、距离检测设备和饮水机
CN201911348086.6 2019-12-24
CN201911424124.1A CN113116153B (zh) 2019-12-31 2019-12-31 水杯高度的测量方法、出水控制方法和出水控制装置
CN201911424124.1 2019-12-31

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