CN117664252A - Method, device, equipment and medium for detecting fault wave of ultrasonic flowmeter - Google Patents
Method, device, equipment and medium for detecting fault wave of ultrasonic flowmeter Download PDFInfo
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Abstract
The utility model provides an ultrasonic flowmeter wrong wave detection method, device, equipment and medium, obtain corresponding target echo signal through initiating the excitation signal that possesses specific waveform information, and further according to the first characteristic wave and the second characteristic wave that correspond with specific waveform information in the target echo signal, can confirm the wrong wave condition of target echo signal through amplitude information and wave sequence information, and then confirm the wrong wave type and the wrong wave degree of target echo signal, thereby realize ultrasonic flowmeter's wrong wave detection, compare the sound velocity in the current water of calculating according to the temperature, can obtain standard flight time according to sound path and sound velocity, and then the wrong wave recognition method of the flight time comparison of measuring with the meter in the meter of this standard flight time has promoted measurement precision and wrong wave recognition application in-process stability.
Description
Technical Field
The present disclosure relates to detection technologies, and in particular, to a method, an apparatus, a device, and a medium for detecting an ultrasonic flow meter fault wave.
Background
Ultrasonic flow meters are increasingly used in the flow detection field because of their advantages of low pressure loss, wide range, low start, bi-directional metering, etc. The measuring principle of the ultrasonic flowmeter is mainly based on a time difference method, and the time difference method is a measuring method for calculating flow information according to the propagation time difference of ultrasonic waves in a measured medium under the condition of forward flow and reverse flow.
In the time difference method, an ultrasonic flowmeter mostly adopts a detection mode of zero crossing comparison, and the method has high requirements on grabbing of the head waves, and head wave judgment is generally carried out by setting a threshold value. In the practical application scene of the ultrasonic flowmeter, more interference, such as scaling on the surface of the transducer, temperature change, more impurities, environmental noise and the like, can occur, and the occurrence of the interference can lead to the change of a receiving signal of the transducer, so that the situation that the set threshold value does not meet the measurement requirement and the false wave occurs is caused.
At present, the conventional false wave identification method mainly calculates the sound velocity in water according to the temperature, the standard flight time can be obtained according to the sound path and the sound velocity, and then the standard flight time is compared with the flight time measured by the meter internal metering chip, so that whether the false wave occurs can be identified.
Disclosure of Invention
The application provides a method, a device, equipment and a medium for detecting the wrong wave of an ultrasonic flowmeter, which are used for solving the problems of low metering precision and poor stability caused by the fact that the ultrasonic flowmeter uses a temperature sensor to detect the wrong wave.
In a first aspect, the present application provides a method for detecting an ultrasonic flow meter fault wave, the method comprising:
determining and initiating an excitation signal, and determining a target echo signal according to the excitation signal;
determining a first characteristic wave and a second characteristic wave according to the target echo signal;
determining false wave information according to the waveform information of the first characteristic wave and the second characteristic wave; and/or determining false wave information according to the wave sequence information of the first characteristic wave and the second characteristic wave;
the waveform information is used for indicating characteristic parameters related to waveforms of the first characteristic wave and the second characteristic wave, the wave sequence information is used for indicating sequence and time interval of the first characteristic wave and the second characteristic wave, and the fault wave information is used for indicating fault wave type and fault wave degree of the target echo signal.
As an alternative embodiment, the waveform information includes amplitude information, and the amplitude information is used for indicating amplitude variation situations of the first characteristic wave and the second characteristic wave;
The determining the information of the wrong wave according to the waveform information of the first characteristic wave and the second characteristic wave comprises the following steps:
determining a reference echo signal according to the excitation signal;
determining a first reference amplitude of a waveform corresponding to the first characteristic wave in the reference echo signal according to the reference echo signal, and determining a second reference amplitude of a waveform corresponding to the second characteristic wave in the reference echo signal;
determining a false wave judgment amplitude according to the first reference amplitude and the second reference amplitude;
and determining the information of the false wave according to the amplitude information of the first characteristic wave and the second characteristic wave and the judging amplitude of the false wave.
As an alternative embodiment, the determining and initiating the excitation signal includes:
determining a target mutation point, taking a waveform before the target mutation point as a first mutation wave, and taking a waveform after the target mutation point as a second mutation wave;
determining and initiating an excitation signal according to the target mutation point, the first mutation wave and the second mutation wave;
the effective amplitude of the second abrupt wave is smaller than that of the first abrupt wave, and the ratio of the effective amplitude of the second abrupt wave to that of the first abrupt wave is smaller than a preset threshold.
As an optional implementation manner, the determining the amplitude of the false wave judgment according to the first reference amplitude and the second reference amplitude includes:
calculating to obtain an average value according to the first reference amplitude and the second reference amplitude, and taking the average value as a false wave judgment amplitude;
and determining the false wave information according to the amplitude information of the first characteristic wave and the second characteristic wave and the false wave judgment amplitude, including:
if the effective amplitude of the first characteristic wave is larger than the false wave judging amplitude and the effective amplitude of the second characteristic wave is smaller than or equal to the false wave judging amplitude, the false wave phenomenon does not occur;
if the effective amplitude of the first characteristic wave is larger than the false wave judging amplitude and the effective amplitude of the second characteristic wave is larger than the false wave judging amplitude, a forward false wave phenomenon occurs;
if the effective amplitude of the first characteristic wave is smaller than or equal to the false wave judging amplitude, a backward false wave phenomenon occurs.
As an alternative embodiment, the determining the false wave information according to the waveform information of the first characteristic wave and the second characteristic wave; and/or, after determining the wrong wave information according to the wave sequence information of the first characteristic wave and the second characteristic wave, the method further comprises:
Determining echo signal compensation conditions according to the false wave information;
acquiring a first echo received by a first transducer and a second echo received by a second transducer on a fluid channel, wherein the first echo and the second echo are respectively sent out by the second transducer and the first transducer under the excitation of an excitation signal;
respectively taking the first echo and the second echo as target echoes according to the echo signal compensation conditions, and executing compensation processing to obtain compensated flight time;
according to the compensated flight time, calculating and obtaining the forward flight time of forward propagation and the backward flight time of backward propagation of the ultrasonic wave in the fluid;
calculating the flow velocity of the fluid according to the forward flow flight time length, the backward flow flight time length and the distance between the first transducer and the second transducer;
and calculating to obtain the instantaneous flow of the fluid according to the flow velocity of the fluid and the effective sectional area of the fluid channel.
In a second aspect, the present application provides an ultrasonic flow meter false wave detection device, the device comprising:
the acquisition module is used for determining and initiating an excitation signal and determining a target echo signal according to the excitation signal;
The processing module is used for determining a first characteristic wave and a second characteristic wave according to the target echo signal;
the processing module is further used for determining false wave information according to the waveform information of the first characteristic wave and the second characteristic wave; and/or determining false wave information according to the wave sequence information of the first characteristic wave and the second characteristic wave;
the waveform information is used for indicating characteristic parameters related to waveforms of the first characteristic wave and the second characteristic wave, the wave sequence information is used for indicating sequence and time interval of the first characteristic wave and the second characteristic wave, and the fault wave information is used for indicating fault wave type and fault wave degree of the target echo signal.
As an alternative embodiment, the waveform information includes amplitude information, and the amplitude information is used for indicating amplitude variation situations of the first characteristic wave and the second characteristic wave;
the processing module determines a specific mode of the false wave information according to the amplitude information of the first characteristic wave and the second characteristic wave, and the specific mode comprises the following steps:
determining a reference echo signal according to the excitation signal;
determining a first reference amplitude of a waveform corresponding to the first characteristic wave in the reference echo signal according to the reference echo signal, and determining a second reference amplitude of a waveform corresponding to the second characteristic wave in the reference echo signal;
Determining a false wave judgment amplitude according to the first reference amplitude and the second reference amplitude;
and determining the information of the false wave according to the amplitude information of the first characteristic wave and the second characteristic wave and the judging amplitude of the false wave.
As an alternative embodiment, the specific manner in which the processing module determines and initiates the excitation signal includes:
determining a target mutation point, taking a waveform before the target mutation point as a first mutation wave, and taking a waveform after the target mutation point as a second mutation wave;
determining and initiating an excitation signal according to the target mutation point, the first mutation wave and the second mutation wave;
the effective amplitude of the second abrupt wave is smaller than that of the first abrupt wave, and the ratio of the effective amplitude of the second abrupt wave to that of the first abrupt wave is smaller than a preset threshold;
and determining an amplitude of the false wave judgment according to the first reference amplitude and the second reference amplitude, including:
calculating to obtain an average value according to the first reference amplitude and the second reference amplitude, and taking the average value as a false wave judgment amplitude;
and determining the false wave information according to the amplitude information of the first characteristic wave and the second characteristic wave and the false wave judgment amplitude, including:
If the effective amplitude of the first characteristic wave is larger than the false wave judging amplitude and the effective amplitude of the second characteristic wave is smaller than or equal to the false wave judging amplitude, the false wave phenomenon does not occur;
if the effective amplitude of the first characteristic wave is larger than the false wave judging amplitude and the effective amplitude of the second characteristic wave is larger than the false wave judging amplitude, a forward false wave phenomenon occurs;
if the effective amplitude of the first characteristic wave is smaller than or equal to the false wave judging amplitude, a backward false wave phenomenon occurs.
As an optional implementation manner, the processing module is further configured to determine false wave information according to waveform information of the first characteristic wave and the second characteristic wave; and/or, determining the wrong wave information according to the wave sequence information of the first characteristic wave and the second characteristic wave,
determining echo signal compensation conditions according to the false wave information;
acquiring a first echo received by a first transducer and a second echo received by a second transducer on a fluid channel, wherein the first echo and the second echo are respectively sent out by the second transducer and the first transducer under the excitation of an excitation signal;
respectively taking the first echo and the second echo as target echoes according to the echo signal compensation conditions, and executing compensation processing to obtain compensated flight time;
According to the compensated flight time, calculating and obtaining the forward flight time of forward propagation and the backward flight time of backward propagation of the ultrasonic wave in the fluid;
calculating the flow velocity of the fluid according to the forward flow flight time length, the backward flow flight time length and the distance between the first transducer and the second transducer;
and calculating to obtain the instantaneous flow of the fluid according to the flow velocity of the fluid and the effective sectional area of the fluid channel.
In a third aspect, the present application further provides an electronic device, including:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of the first aspect.
In a fourth aspect, the present application also provides a computer-readable storage medium having stored therein computer-executable instructions for performing the method according to the first aspect when executed by a processor.
According to the ultrasonic flowmeter false wave detection method, device, equipment and medium, the corresponding target echo signal is obtained by initiating the excitation signal with the specific waveform information, the false wave condition of the target echo signal can be determined according to the first characteristic wave and the second characteristic wave corresponding to the specific waveform information in the target echo signal and the amplitude information and the wave sequence information, and then the false wave type and the false wave degree of the target echo signal are determined, so that the false wave detection of the ultrasonic flowmeter is realized.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.
FIG. 1 is a schematic flow chart of an ultrasonic flowmeter false wave detection method disclosed in an embodiment of the invention;
FIG. 2 is a signal diagram of an ultrasonic flowmeter false wave detection method according to an embodiment of the present invention;
FIG. 3 is a signal diagram of another ultrasonic flow meter false wave detection method according to an embodiment of the present invention;
FIG. 4 is a schematic flow chart of another method for detecting an ultrasonic flow meter fault wave according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of an ultrasonic flow meter false wave detection device according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of an electronic device for detecting an ultrasonic flow meter fault wave according to an embodiment of the present invention.
Specific embodiments thereof have been shown by way of example in the drawings and will herein be described in more detail. These drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present application as detailed in the accompanying claims.
Ultrasound has gained increased attention in the field of detection technology. Ultrasonic flow meters are increasingly used in the flow detection field because of their advantages of low pressure loss, wide range, low start, bi-directional metering, etc. The measuring principle of the ultrasonic flowmeter is based on a time difference method, which is a measuring method for calculating flow information according to the propagation time difference of ultrasonic waves in a measured medium under the conditions of forward flow and reverse flow. In the time difference method, an ultrasonic flowmeter mostly adopts a detection mode of zero crossing comparison, and the method has high requirements on grabbing of the head waves, and head wave judgment is generally carried out by setting a threshold value. In the practical application scene of the ultrasonic flowmeter, more interference, such as scaling on the surface of the transducer, temperature change, more impurities, environmental noise and the like, can occur, and the occurrence of the interference can lead to the change of a receiving signal of the transducer, so that the situation that the set threshold value does not meet the measurement requirement and the false wave occurs is caused.
In the detection field, interference is ubiquitous and unavoidable, so that it is important to select a suitable error-proofing and compensation method. At present, a common false wave identification method is to calculate the sound velocity in water according to temperature, obtain standard flight time according to sound path and sound velocity, and compare the standard flight time with the flight time measured by the meter internal measuring chip to identify whether false waves occur.
For the current method, the cost is high, a temperature sensor needs to be added, the metering precision is low, the flow field in the original meter can be damaged after the temperature sensor is added, the stability is poor, and once the temperature sensor has a problem, the fault wave judgment can not be carried out.
The method solves the zero-flow character passing problem caused by high false wave identification cost, poor stability and inaccurate compensation after the false wave identification. Specifically, the excitation voltage of a part of excitation waveforms of the transmitting circuit is adjusted, the Time of each zero crossing point is collected and output through a Time-to-Digital Converter (TDC) chip, echo signals are collected through the TDC, the amplitude of each waveform is recorded, and the head wave T is confirmed start And amplitude abrupt waveform T end Number of interval waveforms between N intvl Through N intvl And T is end The amplitude of the front and rear waveforms of the system can be used for judging whether the false wave occurs.
The technical concept of the method is that a corresponding target echo signal is obtained by initiating an excitation signal with specific waveform information, the false wave condition of the target echo signal can be determined according to the first characteristic wave and the second characteristic wave corresponding to the specific waveform information in the target echo signal and the amplitude information and the wave sequence information, and then the false wave type and the false wave degree of the target echo signal are determined, so that the false wave detection of the ultrasonic flowmeter is realized.
Example 1
Referring to fig. 1, fig. 1 is a schematic flow chart of an ultrasonic flowmeter fault detection method according to an embodiment of the invention. As shown in fig. 1, the method includes:
s101, determining and initiating an excitation signal, and determining a target echo signal according to the excitation signal;
the excitation signal may be designed by inverting the waveform information of the characteristic wave expected to be obtained for identifying the position of the occurrence of the wrong wave, the waveform information may be amplitude characteristic or frequency characteristic, or further, the first-order derivative or the higher-order derivative of the amplitude characteristic or the frequency characteristic with respect to time may be used as the waveform information. However, in a specific application scenario, the representation form of the waveform information in the excitation signal may be different from the representation form of the waveform information in the target echo signal, for example, a waveform with a corresponding amplitude characteristic is provided in the excitation signal, the corresponding waveform information is represented in the change rate of the amplitude in the echo signal possibly due to the influence of the working condition, or the waveform information corresponding to the excitation signal and the echo signal needs to be represented in the time domain, the frequency domain or the complex frequency domain. To simplify the description of the present application, each embodiment is exemplified by amplitude characteristics, and features of the excitation signal and each echo signal are described, and do not represent a scenario where the present application is applicable only to amplitude characteristics.
S102, determining a first characteristic wave and a second characteristic wave according to a target echo signal;
the first and second characteristic waves are used to indicate waveform information in the target echo signal, and the present application describes an amplitude abrupt wave as an example, that is, waveform information that generates a distinction between the first and second characteristic waves includes an amplitude characteristic.
S103, determining false wave information according to the waveform information of the first characteristic wave and the second characteristic wave; and/or determining false wave information according to the wave sequence information of the first characteristic wave and the second characteristic wave;
the waveform information is used for indicating characteristic parameters of the first characteristic wave and the second characteristic wave related to the waveform, the waveform information can comprise amplitude, phase, frequency and related information of harmonics decomposed based on the original waveform, the waveform sequence information is used for indicating sequence and time interval of the first characteristic wave and the second characteristic wave according to specific application scenes, and the staggered wave information is used for indicating the staggered wave type and the staggered wave degree of the target echo signal.
The method comprises the steps of obtaining a corresponding target echo signal by initiating an excitation signal with specific waveform information, further determining the false wave condition of the target echo signal according to first characteristic waves and second characteristic waves corresponding to the specific waveform information in the target echo signal and amplitude information and wave sequence information, further determining the false wave type and the false wave degree of the target echo signal, realizing the false wave detection of the ultrasonic flowmeter, obtaining standard flight time according to sound path and sound velocity compared with the current method of calculating the sound velocity in water according to temperature, and comparing the standard flight time with the flight time measured by a metering chip in the meter, thereby improving metering precision and stability in the application process of false wave identification.
As an alternative embodiment, the waveform information includes amplitude information, and the amplitude information is used for indicating amplitude variation situations of the first characteristic wave and the second characteristic wave;
determining false wave information according to waveform information of the first characteristic wave and the second characteristic wave, including:
determining a reference echo signal according to the excitation signal;
according to the reference echo signal, determining a first reference amplitude of a waveform corresponding to the first characteristic wave in the reference echo signal, and determining a second reference amplitude of a waveform corresponding to the second characteristic wave in the reference echo signal;
determining a false wave judgment amplitude according to the first reference amplitude and the second reference amplitude;
and determining the information of the wrong wave according to the waveform information of the first characteristic wave and the second characteristic wave and the judging amplitude of the wrong wave.
Before determining the false wave information, the false wave judgment amplitude may be determined according to the reference echo signal, so that the false wave information is determined according to the relation between the false wave judgment amplitude and the amplitude information of the first characteristic wave and the second characteristic wave, which may be described in other embodiments.
The method comprises the steps of determining a reference echo signal through an excitation signal, determining a reference amplitude corresponding to a first characteristic wave and a second characteristic wave in the reference echo signal, determining an error wave judgment amplitude according to the reference amplitude, determining error wave information of a target echo signal according to the relation between the amplitude of the first characteristic wave and the amplitude of the second characteristic wave and the error wave judgment amplitude, and further determining the error wave type and the error wave degree of the target echo signal, thereby realizing error wave detection of an ultrasonic flowmeter.
As an alternative embodiment, determining and initiating the excitation signal comprises:
determining a target mutation point, taking a waveform before the target mutation point as a first mutation wave, and taking a waveform after the target mutation point as a second mutation wave;
determining and initiating an excitation signal according to the target mutation point, the first mutation wave and the second mutation wave;
the effective amplitude of the second abrupt wave is smaller than that of the first abrupt wave, and the ratio of the effective amplitude of the second abrupt wave to that of the first abrupt wave is smaller than a preset threshold;
the embodiment provides a mode of initiating the excitation signal, the effective amplitude of the second abrupt wave may also be larger than that of the first abrupt wave, and the ratio of the effective amplitude of the second abrupt wave to that of the first abrupt wave is larger than a preset threshold, that is, one waveform before and after the target abrupt point of the excitation signal has a significant amplitude difference. Therefore, the echo signal with obvious abrupt change of amplitude can be obtained, the effectiveness of the echo signal is ensured, effective basic data is provided for the step of carrying out false wave judgment according to the amplitude of the echo signal, and the effectiveness of false wave identification is improved.
As an alternative embodiment, determining the amplitude of the false wave judgment according to the first reference amplitude and the second reference amplitude includes:
Calculating to obtain an average value according to the first reference amplitude and the second reference amplitude, and taking the average value as a false wave judgment amplitude;
and determining the wrong wave information according to the waveform information of the first characteristic wave and the second characteristic wave and the wrong wave judgment amplitude, including:
if the effective amplitude of the first characteristic wave is larger than the false wave judging amplitude and the effective amplitude of the second characteristic wave is smaller than or equal to the false wave judging amplitude, the false wave phenomenon does not occur;
if the effective amplitude of the first characteristic wave is larger than the false wave judging amplitude and the effective amplitude of the second characteristic wave is larger than the false wave judging amplitude, the forward false wave phenomenon occurs;
if the effective amplitude of the first characteristic wave is smaller than or equal to the false wave judging amplitude, the backward false wave phenomenon occurs.
According to the average value of the first reference amplitude and the second reference amplitude, an error wave judgment amplitude can be determined, and correspondingly, the error wave judgment amplitude can deviate from the average value to a certain extent, but is located between the first reference amplitude and the second reference amplitude.
The excitation signal which can be effectively identified and responded can be initiated through the preset mutation point condition and the characteristics of the mutation wave, the error wave judgment amplitude can be determined through the average value of waveform amplitudes corresponding to the first characteristic wave and the second characteristic wave in the reference echo signal, the type of the error wave phenomenon can be determined according to the magnitude relation between the effective amplitudes of the first characteristic wave and the second characteristic wave and the error wave judgment amplitude, and the degree of the error wave phenomenon can be further determined through the wave number difference, so that the error wave detection of the ultrasonic flowmeter is realized, compared with the current method for identifying the error wave by calculating the sound velocity in water according to the temperature, the standard flight time can be obtained according to the sound path and the sound velocity, and the standard flight time is compared with the flight time measured by the meter internal metering chip, so that the metering precision and the stability in the error wave identification application process are improved.
As an alternative embodiment, the false wave information is determined according to the waveform information of the first characteristic wave and the second characteristic wave; and/or, after determining the wrong wave information according to the wave sequence information of the first characteristic wave and the second characteristic wave, the method further comprises:
determining echo signal compensation conditions according to the false wave information;
acquiring a first echo received by a first transducer and a second echo received by a second transducer on a fluid channel, wherein the first echo and the second echo are respectively sent out by the second transducer and the first transducer under the excitation of an excitation signal;
respectively taking the first echo and the second echo as target echoes according to echo signal compensation conditions, and executing compensation processing to obtain compensated flight time;
according to the compensated flight time, calculating and obtaining the forward flight time of forward propagation and the backward flight time of backward propagation of the ultrasonic wave in the fluid;
calculating the flow velocity of the fluid according to the forward flow flight time length, the backward flow flight time length and the distance between the first transducer and the second transducer;
and calculating to obtain the instantaneous flow of the fluid according to the flow velocity of the fluid and the effective sectional area of the fluid channel.
According to the determined wave-staggering information, the echo signal compensation condition can be further determined, in the actual measurement process, the first echo received by the first transducer and the second echo received by the second transducer on the fluid channel are subjected to compensation processing according to the determined wave-staggering signal compensation condition, the compensated flight time is determined, the forward flow flight time of the ultrasonic wave propagating forward in the fluid and the backward flow flight time of the ultrasonic wave propagating backward in the fluid are further determined, the flow velocity of the fluid can be calculated by combining the distance between the first transducer and the second transducer, and the instant flow of the fluid can be calculated and obtained according to the flow velocity of the fluid and the effective sectional area of the fluid channel, so that the metering precision of wave-staggering detection and the stability and practicability in the wave-staggering identification application process are improved.
Referring to fig. 2, fig. 2 is a signal schematic diagram of an ultrasonic flowmeter fault detection method according to an embodiment of the invention. As shown in fig. 2, fig. 2 shows waveforms when signals are excited and absorbed.
Ultrasonic flowmeter installs in the pipeline section and generally all can receive transducer surface scale deposit, impurity are more, noise etc. to interfere with, and the appearance of this kind of interference can lead to the change of transducer signal amplitude to cause the wrong ripples to influence the degree of accuracy and the stability of measurement. In order to solve the above problems, whether the current measurement result is in a false wave is identified by changing the size of the excitation signal and determining the abrupt change position of the amplitude of the echo signal.
As before, briefly, the basic flow of ultrasonic flowmeter false wave identification is:
signal excitation: and selecting proper excitation number according to the actual excitation condition of the transducer, and adjusting the amplitude of an excitation signal at the tail end of the excitation signal to be used as a characteristic waveform.
Echo signal: after the excitation signal is sent out by the transmitting transducer, the receiving transducer receives the echo signal, the echo signal is input into the TDC, and the time of different zero crossing points and the peak values of different waveforms are recorded.
Identifying the false wave: and judging whether the fault wave occurs according to the flight time and the peak value of each wave zero crossing point of the echo obtained by the TDC.
Referring to fig. 3, fig. 3 is a signal diagram of another method for detecting an ultrasonic flow meter fault wave according to an embodiment of the invention. As shown in FIG. 3, FIG. 3 is a schematic diagram of echo signals, the head wave is S1, passing through N intvl After each waveform, the last wave of the steady-state waveform is S n ，S n+1 、S n+2 、S n+3 The echo signals corresponding to the abrupt change of the amplitude of the excitation signals.
In the measurement of TDC, the head wave S 1 And last wave S n Number of waveforms between N intvl Is a determined value. S is S 1 、S 2 …S n-1 、S n 、S n+1 、S n+2 Corresponding flight time T 1 、T 2 …T n-1 、T n 、T n+1 、T n+2 Amplitude is Amp 1 、Amp 2 …Amp n-1 、Amp n 、Amp n+1 、Amp n+2 。
Under the working condition that no false wave occurs, the false wave judging threshold value can be determined:
referring to fig. 4, fig. 4 is a flow chart of another method for detecting an ultrasonic flow meter fault wave according to an embodiment of the invention. As shown in fig. 4, by acquiring the amplitude of each waveform of the echo signal, the first wave is N-wave intvl 、N intvl+1 Amplitude Amp of each wave n 、Amp n+1 Amplitude Amp is judged by fault wave thr The comparison of the above can be used to determine whether the ultrasonic flowmeter is in fault or not, and the description of the foregoing embodiments can be specifically referred to.
According to the method, the corresponding target echo signal is obtained by initiating the excitation signal with the specific waveform information, the fault wave condition of the target echo signal can be determined according to the first characteristic wave and the second characteristic wave corresponding to the specific waveform information in the target echo signal and the amplitude information and the wave sequence information, and further the fault wave type and the fault wave degree of the target echo signal are determined, so that fault wave detection of the ultrasonic flowmeter is achieved.
Example two
The embodiment of the invention also provides an ultrasonic flowmeter false wave detection device for realizing the method, referring to fig. 5, fig. 5 is a schematic structural diagram of the ultrasonic flowmeter false wave detection device disclosed in the embodiment of the invention. As shown in fig. 5, the apparatus includes:
an acquisition module 31, configured to determine and initiate an excitation signal, and determine a target echo signal according to the excitation signal;
a processing module 32, configured to determine a first characteristic wave and a second characteristic wave according to the target echo signal;
the processing module 32 is further configured to determine false wave information according to the waveform information of the first characteristic wave and the second characteristic wave; and/or determining false wave information according to the wave sequence information of the first characteristic wave and the second characteristic wave;
the waveform information is used for indicating characteristic parameters of the first characteristic wave and the second characteristic wave related to the waveform, the wave sequence information is used for indicating the sequence and time interval of the first characteristic wave and the second characteristic wave, and the wave staggering information is used for indicating the wave staggering type and the wave staggering degree of the target echo signal.
The method comprises the steps of obtaining a corresponding target echo signal by initiating an excitation signal with specific waveform information, further determining the false wave condition of the target echo signal according to first characteristic waves and second characteristic waves corresponding to the specific waveform information in the target echo signal and amplitude information and wave sequence information, further determining the false wave type and the false wave degree of the target echo signal, realizing the false wave detection of the ultrasonic flowmeter, obtaining standard flight time according to sound path and sound velocity compared with the current method of calculating the sound velocity in water according to temperature, and comparing the standard flight time with the flight time measured by a metering chip in the meter, thereby improving metering precision and stability in the application process of false wave identification.
As an alternative embodiment, the waveform information includes amplitude information, and the amplitude information is used for indicating amplitude variation situations of the first characteristic wave and the second characteristic wave;
the processing module 32 determines a specific mode of the wrong wave information according to the waveform information of the first characteristic wave and the second characteristic wave, including:
determining a reference echo signal according to the excitation signal;
according to the reference echo signal, determining a first reference amplitude of a waveform corresponding to the first characteristic wave in the reference echo signal, and determining a second reference amplitude of a waveform corresponding to the second characteristic wave in the reference echo signal;
determining a false wave judgment amplitude according to the first reference amplitude and the second reference amplitude;
and determining the information of the wrong wave according to the waveform information of the first characteristic wave and the second characteristic wave and the judging amplitude of the wrong wave.
The method comprises the steps of determining a reference echo signal through an excitation signal, determining a reference amplitude corresponding to a first characteristic wave and a second characteristic wave in the reference echo signal, determining an error wave judgment amplitude according to the reference amplitude, determining error wave information of a target echo signal according to the relation between the amplitude of the first characteristic wave and the amplitude of the second characteristic wave and the error wave judgment amplitude, and further determining the error wave type and the error wave degree of the target echo signal, thereby realizing error wave detection of an ultrasonic flowmeter.
As an alternative embodiment, the specific manner in which the processing module 32 determines and initiates the excitation signal includes:
determining a target mutation point, taking a waveform before the target mutation point as a first mutation wave, and taking a waveform after the target mutation point as a second mutation wave;
determining and initiating an excitation signal according to the target mutation point, the first mutation wave and the second mutation wave;
the effective amplitude of the second abrupt wave is smaller than that of the first abrupt wave, and the ratio of the effective amplitude of the second abrupt wave to that of the first abrupt wave is smaller than a preset threshold;
as an alternative embodiment, the processing module 32 determines the specific mode of determining the amplitude of the spurious wave according to the first reference amplitude and the second reference amplitude, including:
calculating to obtain an average value according to the first reference amplitude and the second reference amplitude, and taking the average value as a false wave judgment amplitude;
and, the processing module 32 determines a specific mode of the wrong wave information according to the waveform information of the first characteristic wave and the second characteristic wave and the wrong wave judgment amplitude, including:
if the effective amplitude of the first characteristic wave is larger than the false wave judging amplitude and the effective amplitude of the second characteristic wave is smaller than or equal to the false wave judging amplitude, the false wave phenomenon does not occur;
If the effective amplitude of the first characteristic wave is larger than the false wave judging amplitude and the effective amplitude of the second characteristic wave is larger than the false wave judging amplitude, the forward false wave phenomenon occurs;
if the effective amplitude of the first characteristic wave is smaller than or equal to the false wave judging amplitude, the backward false wave phenomenon occurs.
The excitation signal which can be effectively identified and responded can be initiated through the preset mutation point condition and the characteristics of the mutation wave, the error wave judgment amplitude can be determined through the average value of waveform amplitudes corresponding to the first characteristic wave and the second characteristic wave in the reference echo signal, the type of the error wave phenomenon can be determined according to the magnitude relation between the effective amplitudes of the first characteristic wave and the second characteristic wave and the error wave judgment amplitude, and the degree of the error wave phenomenon can be further determined through the wave number difference, so that the error wave detection of the ultrasonic flowmeter is realized, compared with the current method for identifying the error wave by calculating the sound velocity in water according to the temperature, the standard flight time can be obtained according to the sound path and the sound velocity, and the standard flight time is compared with the flight time measured by the meter internal metering chip, so that the metering precision and the stability in the error wave identification application process are improved.
As an alternative embodiment, the processing module 32 is further configured to determine the false wave information based on the waveform information of the first characteristic wave and the second characteristic wave; and/or, after determining the wrong wave information according to the wave order information of the first characteristic wave and the second characteristic wave,
Determining echo signal compensation conditions according to the false wave information;
acquiring a first echo received by a first transducer and a second echo received by a second transducer on a fluid channel, wherein the first echo and the second echo are respectively sent out by the second transducer and the first transducer under the excitation of an excitation signal;
respectively taking the first echo and the second echo as target echoes according to echo signal compensation conditions, and executing compensation processing to obtain compensated flight time;
according to the compensated flight time, calculating and obtaining the forward flight time of forward propagation and the backward flight time of backward propagation of the ultrasonic wave in the fluid;
calculating the flow velocity of the fluid according to the forward flow flight time length, the backward flow flight time length and the distance between the first transducer and the second transducer;
and calculating to obtain the instantaneous flow of the fluid according to the flow velocity of the fluid and the effective sectional area of the fluid channel.
According to the determined wave-staggering information, the echo signal compensation condition can be further determined, in the actual measurement process, the first echo received by the first transducer and the second echo received by the second transducer on the fluid channel are subjected to compensation processing according to the determined wave-staggering signal compensation condition, the compensated flight time is determined, the forward flow flight time of the ultrasonic wave propagating forward in the fluid and the backward flow flight time of the ultrasonic wave propagating backward in the fluid are further determined, the flow velocity of the fluid can be calculated by combining the distance between the first transducer and the second transducer, and the instant flow of the fluid can be calculated and obtained according to the flow velocity of the fluid and the effective sectional area of the fluid channel, so that the metering precision of wave-staggering detection and the stability and practicability in the wave-staggering identification application process are improved.
Example III
The application also provides an electronic device comprising:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform a method as in any one of the embodiments.
The present application also provides a computer-readable storage medium having stored therein computer-executable instructions which, when executed by a processor, are adapted to carry out a method as in any of the embodiments.
Referring to fig. 6, fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the invention. As shown in fig. 6, the electronic device may include:
a Processor 291, the apparatus further comprising a Memory 292 in which executable program code is stored; a communication interface (Communication Interface) 293 and bus 294 may also be included. The processor 291, the memory 292, and the communication interface 293 may communicate with each other via the bus 294. Communication interface 293 may be used for information transfer. The processor 291 is coupled to the memory 292, and the processor 291 may call logic instructions (executable program code) in the memory 292 to perform the methods of any of the embodiments described above.
Further, the logic instructions in memory 292 described above may be implemented in the form of software functional units and stored in a computer-readable storage medium when sold or used as a stand-alone product.
The memory 292 is a computer readable storage medium, and may be used to store a software program, a computer executable program, and program instructions/modules corresponding to the methods in the embodiments of the present application. The processor 291 executes functional applications and data processing by running software programs, instructions and modules stored in the memory 292, i.e., implements the methods of the method embodiments described above.
Memory 292 may include a storage program area that may store an operating system, at least one application program required for functionality, and a storage data area; the storage data area may store data created according to the use of the terminal device, etc. Further, memory 292 may include high-speed random access memory, and may also include non-volatile memory.
The embodiment of the invention also provides a computer readable storage medium, wherein computer executable instructions are stored in the computer readable storage medium, and the computer executable instructions are used for realizing the method in any embodiment when being called.
Embodiments of the present invention also disclose a computer program product comprising a non-transitory computer readable storage medium storing a computer program, the computer program being operable to cause a computer to perform the steps of the method described in any of the embodiments.
The apparatus embodiments described above are merely illustrative, in which the modules illustrated as separate components may or may not be physically separate, and the components shown as modules may or may not be physical, i.e., may be located in one place, or may be distributed over multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above detailed description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course by means of hardware. Based on such understanding, the foregoing technical solutions may be embodied essentially or in part in the form of a software product that may be stored in a computer-readable storage medium including Read-Only Memory (ROM), random-access Memory (Random Access Memory, RAM), programmable Read-Only Memory (Programmable Read-Only Memory, PROM), erasable programmable Read-Only Memory (Erasable Programmable Read Only Memory, EPROM), one-time programmable Read-Only Memory (OTPROM), electrically erasable programmable Read-Only Memory (EEPROM), compact disc Read-Only Memory (Compact Disc Read-Only Memory, CD-ROM) or other optical disc Memory, magnetic disc Memory, tape Memory, or any other medium that can be used for computer-readable carrying or storing data.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
It is to be understood that the present application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (10)
1. An ultrasonic flowmeter false wave detection method, characterized in that the method comprises:
determining and initiating an excitation signal, and determining a target echo signal according to the excitation signal;
determining a first characteristic wave and a second characteristic wave according to the target echo signal;
determining false wave information according to the waveform information of the first characteristic wave and the second characteristic wave; and/or determining false wave information according to the wave sequence information of the first characteristic wave and the second characteristic wave;
The waveform information is used for indicating characteristic parameters related to waveforms of the first characteristic wave and the second characteristic wave, the wave sequence information is used for indicating sequence and time interval of the first characteristic wave and the second characteristic wave, and the fault wave information is used for indicating fault wave type and fault wave degree of the target echo signal.
2. The method of claim 1, wherein the waveform information includes amplitude information indicating amplitude variation of the first and second characteristic waves;
the determining the information of the wrong wave according to the waveform information of the first characteristic wave and the second characteristic wave comprises the following steps:
determining a reference echo signal according to the excitation signal;
determining a first reference amplitude of a waveform corresponding to the first characteristic wave in the reference echo signal according to the reference echo signal, and determining a second reference amplitude of a waveform corresponding to the second characteristic wave in the reference echo signal;
determining a false wave judgment amplitude according to the first reference amplitude and the second reference amplitude;
and determining the information of the false wave according to the amplitude information of the first characteristic wave and the second characteristic wave and the judging amplitude of the false wave.
3. The method of claim 2, wherein said determining and initiating an excitation signal comprises:
determining a target mutation point, taking a waveform before the target mutation point as a first mutation wave, and taking a waveform after the target mutation point as a second mutation wave;
determining and initiating an excitation signal according to the target mutation point, the first mutation wave and the second mutation wave;
the effective amplitude of the second abrupt wave is smaller than that of the first abrupt wave, and the ratio of the effective amplitude of the second abrupt wave to that of the first abrupt wave is smaller than a preset threshold.
4. The method of claim 2, wherein determining a false wave determination magnitude from the first reference magnitude and the second reference magnitude comprises:
calculating to obtain an average value according to the first reference amplitude and the second reference amplitude, and taking the average value as a false wave judgment amplitude;
and determining the false wave information according to the amplitude information of the first characteristic wave and the second characteristic wave and the false wave judgment amplitude, including:
if the effective amplitude of the first characteristic wave is larger than the false wave judging amplitude and the effective amplitude of the second characteristic wave is smaller than or equal to the false wave judging amplitude, the false wave phenomenon does not occur;
If the effective amplitude of the first characteristic wave is larger than the false wave judging amplitude and the effective amplitude of the second characteristic wave is larger than the false wave judging amplitude, a forward false wave phenomenon occurs;
if the effective amplitude of the first characteristic wave is smaller than or equal to the false wave judging amplitude, a backward false wave phenomenon occurs.
5. The method according to any one of claims 1-4, wherein the determining of the false wave information is based on waveform information of the first and second characteristic waves; and/or, after determining the wrong wave information according to the wave sequence information of the first characteristic wave and the second characteristic wave, the method further comprises:
determining echo signal compensation conditions according to the false wave information;
acquiring a first echo received by a first transducer and a second echo received by a second transducer on a fluid channel, wherein the first echo and the second echo are respectively sent out by the second transducer and the first transducer under the excitation of an excitation signal;
respectively taking the first echo and the second echo as target echoes according to the echo signal compensation conditions, and executing compensation processing to obtain compensated flight time;
According to the compensated flight time, calculating and obtaining the forward flight time of forward propagation and the backward flight time of backward propagation of the ultrasonic wave in the fluid;
calculating the flow velocity of the fluid according to the forward flow flight time length, the backward flow flight time length and the distance between the first transducer and the second transducer;
and calculating to obtain the instantaneous flow of the fluid according to the flow velocity of the fluid and the effective sectional area of the fluid channel.
6. An ultrasonic flow meter false wave detection device, the device comprising:
the acquisition module is used for determining and initiating an excitation signal and determining a target echo signal according to the excitation signal;
the processing module is used for determining a first characteristic wave and a second characteristic wave according to the target echo signal;
the processing module is further used for determining false wave information according to the waveform information of the first characteristic wave and the second characteristic wave; and/or determining false wave information according to the wave sequence information of the first characteristic wave and the second characteristic wave;
the waveform information is used for indicating characteristic parameters related to waveforms of the first characteristic wave and the second characteristic wave, the wave sequence information is used for indicating sequence and time interval of the first characteristic wave and the second characteristic wave, and the fault wave information is used for indicating fault wave type and fault wave degree of the target echo signal.
7. The apparatus of claim 6, wherein the waveform information includes amplitude information indicating amplitude variation of the first and second characteristic waves;
the processing module determines a specific mode of the false wave information according to the amplitude information of the first characteristic wave and the second characteristic wave, and the specific mode comprises the following steps:
determining a reference echo signal according to the excitation signal;
determining a first reference amplitude of a waveform corresponding to the first characteristic wave in the reference echo signal according to the reference echo signal, and determining a second reference amplitude of a waveform corresponding to the second characteristic wave in the reference echo signal;
determining a false wave judgment amplitude according to the first reference amplitude and the second reference amplitude;
and determining the information of the false wave according to the amplitude information of the first characteristic wave and the second characteristic wave and the judging amplitude of the false wave.
8. The apparatus of claim 7, wherein the processing module determines and initiates a specific manner of excitation signal, comprising:
determining a target mutation point, taking a waveform before the target mutation point as a first mutation wave, and taking a waveform after the target mutation point as a second mutation wave;
Determining and initiating an excitation signal according to the target mutation point, the first mutation wave and the second mutation wave;
the effective amplitude of the second abrupt wave is smaller than that of the first abrupt wave, and the ratio of the effective amplitude of the second abrupt wave to that of the first abrupt wave is smaller than a preset threshold;
and the processing module determines a specific mode of determining the amplitude of the false wave according to the first reference amplitude and the second reference amplitude, and the specific mode includes:
calculating to obtain an average value according to the first reference amplitude and the second reference amplitude, and taking the average value as a false wave judgment amplitude;
and the processing module determines a specific mode of the wrong wave information according to the amplitude information of the first characteristic wave and the second characteristic wave and the wrong wave judgment amplitude, and the specific mode comprises the following steps:
if the effective amplitude of the first characteristic wave is larger than the false wave judging amplitude and the effective amplitude of the second characteristic wave is smaller than or equal to the false wave judging amplitude, the false wave phenomenon does not occur;
if the effective amplitude of the first characteristic wave is larger than the false wave judging amplitude and the effective amplitude of the second characteristic wave is larger than the false wave judging amplitude, a forward false wave phenomenon occurs;
If the effective amplitude of the first characteristic wave is smaller than or equal to the false wave judging amplitude, a backward false wave phenomenon occurs.
9. An electronic device, comprising:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of any one of claims 1-5.
10. A computer readable storage medium having stored therein computer executable instructions which when executed by a processor are adapted to carry out the method of any one of claims 1-5.
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