Ultrasonic signal processing method, system and ultrasonic measuring device

Abstract

The present invention provides an ultrasonic signal processing method, system and ultrasonic measuring equipment, which relate to the field of ultrasonic data processing. The method uses a phase-locked amplifier to extract useful ultrasonic signals from a strong noise background, which can not only identify the frequency of the signal to be measured, but also lock the phase of the signal, and can effectively filter the lamb waves generated on the surface of the medium when multiple groups of ultrasonic sensors work simultaneously, so that the multiple groups of ultrasonic sensors can be controlled simultaneously, solving the problem of low processing efficiency caused by time-sharing control.

Description

Technical Field

[0001] The present invention relates to the field of ultrasonic data processing, and in particular to an ultrasonic signal processing method, system and ultrasonic measuring equipment. Background Art

[0002] In the process of measuring the surface density of the fluid using ultrasonic measuring equipment, it is necessary to use the ultrasonic sensor's transmission and reception time of the ultrasonic signal and the signal attenuation strength to infer the surface density of the fluid medium. According to the positional relationship of the sensor in the process of measuring the fluid medium, the existing ultrasonic measuring equipment mainly involves two categories: routing type and matrix type. The sensor in the routing ultrasonic measuring equipment needs to reciprocate at the upper and lower ends of the medium; the sensor in the matrix ultrasonic measuring equipment is equipped with multiple groups of ultrasonic sensors at both ends of the medium to independently realize the functions of transmitting and receiving ultrasonic waves, and the sensor position is fixed and does not move. Since the sensors in the matrix ultrasonic measuring equipment do not move, the measurement accuracy is higher, and the number of sensors is more and the coverage is wider. Therefore, the matrix ultrasonic measuring equipment is usually used in the process of detecting high-precision surface density.

[0003] In the actual measurement process, when multiple groups of ultrasonic sensors in the matrix ultrasonic measurement equipment work at the same time, the lamb waves generated on the surface of the medium will interfere with the transmission signals of each group of ultrasonic sensors and affect the accuracy of the ultrasonic signal. Therefore, each group of ultrasonic sensors needs to be controlled in time. Under the time-sharing control, only one group of ultrasonic sensors can transmit and receive at the same time, and the next group of ultrasonic sensors can only work after the previous group of ultrasonic sensors has finished working. However, the processing efficiency of the ultrasonic measurement process under time-sharing control is low, and it is difficult to measure the surface density of the fluid medium in full area. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide an ultrasonic signal processing method, system and ultrasonic measuring equipment. The method uses a phase-locked amplifier to extract useful ultrasonic signals from a strong noise background, which can not only identify the frequency of the signal to be measured, but also lock the phase of the signal. It can effectively filter the lamb waves generated on the surface of the medium when multiple groups of ultrasonic sensors work simultaneously, so that multiple groups of ultrasonic sensors can be controlled simultaneously, solving the problem of low processing efficiency caused by time-sharing control.

[0005] In a first aspect, an embodiment of the present invention provides an ultrasonic signal processing method, which is applied to a surface density measurement process of an ultrasonic measuring device; wherein a plurality of groups of fixed-position ultrasonic sensors are provided in the ultrasonic measuring device, and each group of ultrasonic sensors includes at least a pair of ultrasonic transducers and their corresponding lock-in amplifiers;

[0006] The method includes:

[0007] Determining layout parameters of the ultrasonic sensor based on the signal frequency parameters of the ultrasonic transducer, and deploying the ultrasonic sensor in the ultrasonic measurement device using the layout parameters;

[0008] Obtain the signal to be measured output by the ultrasonic sensor, and determine the reference signal corresponding to the signal to be measured using the frequency value of the signal to be measured;

[0009] Controlling the lock-in amplifier to calculate the product between the signal to be measured and the reference signal, and obtaining the DC component contained in the product;

[0010] The amplitude and phase angle corresponding to the DC component are calculated based on the reference signal, and the signal to be measured is updated based on the amplitude and phase angle.

[0011] Optionally, determining the layout parameters of the ultrasonic sensor based on the signal frequency parameters of the ultrasonic transducer includes:

[0012] Determine the frequency value corresponding to the ultrasonic transducer using the signal frequency parameter corresponding to the ultrasonic transducer;

[0013] The frequency values ​​are sorted according to a preset frequency interval threshold, and the position parameters corresponding to each group of ultrasonic sensors are determined according to the sorting result;

[0014] The layout parameters corresponding to each group of ultrasonic sensors are determined based on the position parameters.

[0015] Optionally, the ultrasonic sensors in the ultrasonic measurement device are deployed using layout parameters, including:

[0016] Determine a first position corresponding to a lock-in amplifier based on the layout parameters; wherein the lock-in amplifier in the first position is used to filter out noise signals generated by adjacent ultrasonic transducers;

[0017] Determine a second position corresponding to a transmitting transducer in the ultrasonic sensor based on the layout parameter and the first position;

[0018] Based on the layout parameters and the second position, determining a third position corresponding to the receiving transducer in the ultrasonic sensor; wherein the transmitting transducer and the receiving transducer are a pair of ultrasonic transducers;

[0019] The ultrasonic sensors are deployed according to the first position, the second position and the third position.

[0020] Optionally, obtaining a signal to be measured output by the ultrasonic sensor, and determining a reference signal corresponding to the signal to be measured using a frequency value of the signal to be measured, includes:

[0021] Acquire a signal to be measured output by the ultrasonic sensor based on a time parameter; wherein the signal to be measured includes a noise signal;

[0022] Obtaining a frequency value and a first amplitude of the signal to be measured, and using the first amplitude to determine a second amplitude and a phase difference value corresponding to the reference signal;

[0023] A reference signal is constructed according to the second amplitude value, the phase difference value and the frequency value.

[0024] Optionally, controlling the lock-in amplifier to calculate the product between the signal to be measured and the reference signal, and obtaining a DC component contained in the product, including:

[0025] Obtaining a phase-sensitive detector in a phase-locked amplifier, and controlling the phase-sensitive detector to receive a signal to be measured and a reference signal;

[0026] Controlling the phase-sensitive detector to calculate the product of the measured signal and the reference signal under the orthogonal component, and obtaining the first product and the second product corresponding to the orthogonal component based on the product;

[0027] The DC component is obtained by controlling the lock-in amplifier to remove the AC component in the first product and the second product.

[0028] Optionally, controlling the lock-in amplifier to remove the AC component in the first product and the second product to obtain a DC component includes:

[0029] Obtain a low-pass filter in a phase-locked amplifier and determine an AC threshold corresponding to the low-pass filter;

[0030] The low-pass filter is controlled to remove the AC component in the first product and the second product according to the AC threshold value to obtain the DC component.

[0031] Optionally, calculating the amplitude and phase angle corresponding to the DC component based on the reference signal includes:

[0032] Obtaining a direct current component with the same phase, and determining a reference signal contained in the direct current component;

[0033] After the DC component is normalized based on the amplitude of the reference signal, the amplitude and phase angle are calculated using the corresponding results of the DC component under the orthogonal component.

[0034] Optionally, the measured signal is updated based on the amplitude and phase angle, including:

[0035] Based on the amplitude and phase angle, a measurement signal corresponding to the DC component is constructed using a time parameter;

[0036] The measured signal is used to update the signal under test.

[0037] In a second aspect, the present invention provides an ultrasonic signal processing system, which is applied to the surface density measurement process of an ultrasonic measuring device; wherein the ultrasonic measuring device is provided with a plurality of groups of ultrasonic sensors with fixed positions, and each group of ultrasonic sensors includes at least a pair of ultrasonic transducers and their corresponding phase-locked amplifiers;

[0038] The system includes:

[0039] An equipment deployment control module, used to determine the layout parameters of the ultrasonic sensor based on the signal frequency parameters of the ultrasonic transducer, and to deploy the ultrasonic sensor in the ultrasonic measurement equipment using the layout parameters;

[0040] A reference signal determination module is used to obtain the signal to be measured output by the ultrasonic sensor, and determine the reference signal corresponding to the signal to be measured using the frequency value of the signal to be measured;

[0041] A DC component acquisition module is used to control the lock-in amplifier to calculate the product between the signal to be measured and the reference signal, and to obtain the DC component contained in the product;

[0042] The signal processing execution module is used to calculate the amplitude and phase angle corresponding to the DC component based on the reference signal, and update the signal to be measured based on the amplitude and phase angle.

[0043] In a third aspect, an embodiment of the present invention further provides an ultrasonic measuring device, in which a plurality of groups of fixed-position ultrasonic sensors are provided, and each group of ultrasonic sensors includes at least a pair of ultrasonic transducers and their corresponding phase-locked amplifiers; during the surface density measurement process, the ultrasonic measuring device adopts the steps of the ultrasonic signal processing method provided in the first aspect.

[0044] In a fourth aspect, an embodiment of the present invention further provides an electronic device, including a processor and a memory, wherein the memory stores computer executable instructions that can be executed by the processor, and the processor executes the computer executable instructions to implement the steps of the ultrasonic signal processing method provided in the first aspect.

[0045] In a fifth aspect, an embodiment of the present invention further provides a storage medium storing computer executable instructions. When the computer executable instructions are called and executed by a processor, the computer executable instructions prompt the processor to implement the steps of the ultrasonic signal processing method provided in the first aspect.

[0046] An ultrasonic signal processing method, system and ultrasonic measuring device provided in an embodiment of the present invention are applied to the surface density measurement process of the ultrasonic measuring device; wherein, a plurality of groups of ultrasonic sensors with fixed positions are arranged in the ultrasonic measuring device, and each group of ultrasonic sensors includes at least a pair of ultrasonic transducers and their corresponding phase-locked amplifiers. In the process of filtering and processing the ultrasonic signal using the phase-locked amplifier, firstly, the layout parameters of the ultrasonic sensor are determined based on the signal frequency parameters of the ultrasonic transducer, and the ultrasonic sensors in the ultrasonic measuring device are deployed using the layout parameters; then, the signal to be measured output by the ultrasonic sensor is obtained, and the reference signal corresponding to the signal to be measured is determined using the frequency value of the signal to be measured; then, the phase-locked amplifier is controlled to calculate the product between the signal to be measured and the reference signal, and the DC component contained in the product is obtained; finally, the amplitude and phase angle corresponding to the DC component are calculated based on the reference signal, and the signal to be measured is updated based on the amplitude and phase angle. This method uses a phase-locked amplifier to extract useful ultrasonic signals from a strong noise background. It can not only identify the frequency of the signal to be measured, but also lock the phase of the signal. It can effectively filter the lamb waves generated on the surface of the medium when multiple groups of ultrasonic sensors work simultaneously, so that multiple groups of ultrasonic sensors can be controlled simultaneously, solving the problem of low processing efficiency caused by time-sharing control.

[0047] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description, claims and drawings.

[0048] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0050] Figure 1 A flowchart of an ultrasonic signal processing method provided by an embodiment of the present invention;

[0051] Figure 2 A flow chart of determining layout parameters of an ultrasonic sensor based on a signal frequency parameter of an ultrasonic transducer in an ultrasonic signal processing method provided by an embodiment of the present invention;

[0052] Figure 3 A flow chart of deploying ultrasonic sensors in an ultrasonic measuring device using layout parameters in an ultrasonic signal processing method provided by an embodiment of the present invention;

[0053] Figure 4 A flowchart of step S102 in an ultrasonic signal processing method provided by an embodiment of the present invention;

[0054] Figure 5 A flowchart of step S103 in an ultrasonic signal processing method provided by an embodiment of the present invention;

[0055] Figure 6 A flowchart of step S503 in an ultrasonic signal processing method provided by an embodiment of the present invention;

[0056] Figure 7 A flow chart of calculating the amplitude and phase angle corresponding to a DC component based on a reference signal in an ultrasonic signal processing method provided in an embodiment of the present invention;

[0057] Figure 8 A flow chart of updating a signal to be measured based on amplitude and phase angle in an ultrasonic signal processing method provided by an embodiment of the present invention;

[0058] Fig. 9 A schematic diagram of an ultrasonic signal processing system provided by an embodiment of the present invention;

[0059] Fig.10 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention.

[0060] Reference numerals:

[0061] 910-device deployment control module; 920-reference signal determination module; 930-DC component acquisition module; 940-signal processing execution module;

[0062] 101 - processor; 102 - memory; 103 - bus; 104 - communication interface. DETAILED DESCRIPTION

[0063] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described in combination with the embodiments below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0064] In the process of measuring the surface density of the fluid using ultrasonic measuring equipment, it is necessary to use the ultrasonic sensor's transmission and reception time of the ultrasonic signal and the signal attenuation strength to infer the surface density of the fluid medium. According to the positional relationship of the sensor in the process of measuring the fluid medium, the existing ultrasonic measuring equipment mainly involves two categories: routing type and matrix type. The sensor in the routing ultrasonic measuring equipment needs to reciprocate at the upper and lower ends of the medium; the sensor in the matrix ultrasonic measuring equipment is equipped with multiple groups of ultrasonic sensors at both ends of the medium to independently realize the functions of transmitting and receiving ultrasonic waves, and the sensor position is fixed and does not move. Since the sensors in the matrix ultrasonic measuring equipment do not move, the measurement accuracy is higher, and the number of sensors is more and the coverage is wider. Therefore, the matrix ultrasonic measuring equipment is usually used in the process of detecting high-precision surface density.

[0065] Because the transducer transmits and receives perpendicularly to the medium, it is a longitudinal wave, which will generate lamb waves on the surface of the medium. If multiple pairs of transducers work at the same time, a certain receiving transducer will have both the longitudinal waves generated by its own transmitting transducer and the lamb waves generated by other transmitting transducers, which are combined and superimposed to generate ultrasonic waves. The superimposed ultrasonic waves are not easy to distinguish the size of the longitudinal wave and the lamb wave, which affects the accuracy of the ultrasonic signal. Therefore, it is necessary to control each group of ultrasonic sensors in a time-sharing manner.

[0066] For example, in some matrix ultrasonic measuring instruments, every 8 pairs of transducers are set as a group, and only one pair of transducers in each group transmits and receives waves at the same time. Only after the previous pair of transducers finishes working, the next pair of transducers will start working. Due to the time-sharing control, only one group of ultrasonic sensors can transmit and receive at the same time, and only after the previous group of ultrasonic sensors finishes working, the next group of ultrasonic sensors can work. As a result, the processing efficiency of the ultrasonic measurement process under time-sharing control is low, and it is difficult to measure the surface density of the fluid medium over the entire area.

[0067] Based on this, the present invention provides an ultrasonic signal processing method, system and ultrasonic measuring equipment. The method uses a phase-locked amplifier to extract useful ultrasonic signals from a strong noise background. It can not only identify the frequency of the signal to be measured, but also lock the phase of the signal. It can effectively filter the lamb waves generated on the surface of the medium when multiple groups of ultrasonic sensors work simultaneously, so that multiple groups of ultrasonic sensors can be controlled simultaneously, solving the problem of low processing efficiency caused by time-sharing control.

[0068] To facilitate understanding of this embodiment, an ultrasonic signal processing method disclosed in an embodiment of the present invention is first introduced in detail. The method is applied to the surface density measurement process of an ultrasonic measuring device; wherein, a plurality of groups of fixed-position ultrasonic sensors are arranged in the ultrasonic measuring device, and each group of ultrasonic sensors includes at least a pair of ultrasonic transducers and their corresponding phase-locked amplifiers.

[0069] This method is Figure 1 As shown, including:

[0070] Step S101, determining layout parameters of ultrasonic sensors based on signal frequency parameters of ultrasonic transducers, and deploying ultrasonic sensors in ultrasonic measuring equipment using the layout parameters;

[0071] Step S102, obtaining a signal to be measured output by the ultrasonic sensor, and determining a reference signal corresponding to the signal to be measured using a frequency value of the signal to be measured;

[0072] Step S103, controlling the lock-in amplifier to calculate the product between the signal to be measured and the reference signal, and obtaining the DC component contained in the product;

[0073] Step S104, calculating the amplitude and phase angle corresponding to the DC component based on the reference signal, and updating the signal to be measured based on the amplitude and phase angle.

[0074] Specifically, the specific position of the ultrasonic sensor is first deployed according to the signal frequency parameters of the ultrasonic transducer. Specifically, multiple pairs of ultrasonic transducers are set at both ends of the fluid cutoff, and each pair is a group. Each group independently realizes the function of transmitting and receiving ultrasonic waves. The deployment is specifically carried out according to the layout parameters of the ultrasonic sensor. After deployment, the position of the ultrasonic transducer is fixed and does not move.

[0075] After the ultrasonic sensor is deployed, it obtains the corresponding signal to be measured, and uses the frequency value of the signal to be measured to determine the corresponding reference signal. Specifically, the frequency of the reference signal is related to the frequency of the signal to be measured, but not to the noise signal, so that the useful signal can be extracted from the strong background noise. In addition, there is a certain phase difference between the signal to be measured and the reference signal, so the phase-locked amplifier can be used to identify the frequency of the signal to be measured and lock the phase of the signal at the same time.

[0076] In the specific implementation process, the phase-locked amplifier is controlled to calculate the product between the signal to be measured and the reference signal, and the DC component contained in the product is obtained, thereby realizing coherent detection. Since the probability of noise and signal being of the same frequency and phase is extremely small, the usable signal in the signal to be measured can be extracted based on the amplitude and phase angle of the DC component, thereby realizing effective filtering of noise.

[0077] Optionally, the layout parameters of the ultrasonic sensor are determined based on the signal frequency parameters of the ultrasonic transducer, such as Figure 2 As shown, including:

[0078] Step S201, determining a frequency value corresponding to the ultrasonic transducer using a signal frequency parameter corresponding to the ultrasonic transducer;

[0079] Step S202, sorting the frequency values ​​according to a preset frequency interval threshold, and determining the position parameters corresponding to each group of ultrasonic sensors according to the sorting result;

[0080] Step S203: determining layout parameters corresponding to each group of ultrasonic sensors based on the position parameters.

[0081] Specifically, ultrasonic transducers of different frequencies are arranged in a row at equal intervals. First, the frequency value corresponding to the ultrasonic transducer is determined using the signal frequency parameter corresponding to the ultrasonic transducer. For example, the frequencies are: 100K, 200K, 300K, 50K, 150K, 250K, and 350K. Then, the frequency values ​​are sorted according to the preset frequency interval threshold, and the position parameters corresponding to each group of ultrasonic sensors are determined according to the sorting results. Specifically, the frequency difference between adjacent transducers can be 100K. Finally, the generated position parameters are used to obtain the layout parameters of the ultrasonic sensor, and then the ultrasonic sensor is laid out using the layout parameters.

[0082] Optionally, the ultrasonic sensors in the ultrasonic measurement device are deployed using layout parameters, such as Figure 3 As shown, including:

[0083] Step S301, determining a first position corresponding to a lock-in amplifier based on the layout parameters; wherein the lock-in amplifier in the first position is used to filter out noise signals generated by adjacent ultrasonic transducers;

[0084] Step S302, determining a second position corresponding to the transmitting transducer in the ultrasonic sensor based on the layout parameter and the first position;

[0085] Step S303, determining a third position corresponding to a receiving transducer in the ultrasonic sensor based on the layout parameter and the second position; wherein the transmitting transducer and the receiving transducer are a pair of ultrasonic transducers;

[0086] Step S304: deploying ultrasonic sensors according to the first position, the second position, and the third position.

[0087] During the deployment of ultrasonic sensors, the position of the phase-locked amplifier needs to be combined to filter out the lamb waves generated by adjacent transducers. The transmitting transducer corresponding to the same frequency as itself is left alone, and the transmitted ultrasonic wave enters the receiving transducer of the same frequency after being attenuated by the fluid medium.

[0088] Therefore, the specific position of the phase-locked amplifier is first obtained, and the first position corresponding to the phase-locked amplifier is determined based on the layout parameters. The phase-locked amplifier at this position is used to filter out the noise signal generated by the adjacent ultrasonic transducer. Then, the second position corresponding to the transmitting transducer in the ultrasonic sensor is determined based on the layout parameters and the first position; and then, the third position of the receiving transducer corresponding to the transmitting transducer in the ultrasonic sensor is determined based on the layout parameters and the second position.

[0089] Subsequently, the ultrasonic sensors are deployed according to the first position, the second position and the third position, and the positions of the deployed ultrasonic transducers are fixed.

[0090] Optionally, the step S102 of obtaining the test signal output by the ultrasonic sensor and determining the reference signal corresponding to the test signal by using the frequency value of the test signal is as follows: Figure 4 As shown, including:

[0091] Step S401, obtaining a signal to be measured output by the ultrasonic sensor based on a time parameter; wherein the signal to be measured includes a noise signal;

[0092] Step S402, obtaining a frequency value and a first amplitude of the signal to be measured, and using the first amplitude to determine a second amplitude and a phase difference value corresponding to the reference signal;

[0093] Step S403: construct a reference signal according to the second amplitude, phase difference and frequency value.

[0094] The construction process of the reference signal makes full use of the frequency value of the signal to be measured. First, the signal to be measured output by the ultrasonic sensor can be obtained based on the time parameter; wherein the signal to be measured contains a noise signal. For example, the signal to be measured can be: ;in is the noise signal mixed into the signal to be measured; is the first amplitude corresponding to the signal to be measured. The constructed reference signal is two orthogonal sinusoidal signals, which are: ; ; is the second amplitude corresponding to the reference signal. are the frequencies of the measured signal and the reference signal, is the phase difference between them.

[0095] Optionally, the lock-in amplifier is controlled to calculate the product between the signal to be measured and the reference signal, and the DC component contained in the product is obtained in step S103, such as Figure 5 As shown, including:

[0096] Step S501, obtaining a phase-sensitive detector in a phase-locked amplifier, and controlling the phase-sensitive detector to receive a signal to be measured and a reference signal;

[0097] Step S502, controlling the phase-sensitive detector to calculate the product of the measured signal and the reference signal under the orthogonal component, and obtaining the first product and the second product corresponding to the orthogonal component based on the product;

[0098] Step S503, controlling the lock-in amplifier to remove the AC components in the first product and the second product to obtain the DC components.

[0099] After the phase-sensitive detector obtains the measured signal and the reference signal, it calculates the product of the two according to the orthogonal direction of the reference signal. For details, refer to the following formula:

[0100] ;

[0101] .

[0102] The signal to be tested With reference signal The first product of The signal to be tested With reference signal The second product of .

[0103] After the first product and the second product are obtained, the AC component contained therein is removed to obtain a DC component of the same phase. Optionally, the lock-in amplifier is controlled to remove the AC component in the first product and the second product to obtain a DC component in step S503, such as Figure 6 As shown, including:

[0104] Step S601, obtaining a low-pass filter in a phase-locked amplifier, and determining an AC threshold corresponding to the low-pass filter;

[0105] Step S602 , controlling a low-pass filter to remove the AC component in the first product and the second product according to the AC threshold value to obtain a DC component.

[0106] The AC component is removed by using a preset low-pass filter in the lock-in amplifier and the AC component is removed according to the AC threshold corresponding to the low-pass filter. and The AC component in the equation is:

[0107] .

[0108] Optionally, the amplitude and phase angle corresponding to the DC component are calculated based on the reference signal, such as Figure 7 As shown, including:

[0109] Step S701, obtaining a DC component with the same phase, and determining a reference signal contained in the DC component;

[0110] Step S702: After normalizing the DC component based on the amplitude of the reference signal, the amplitude and phase angle are calculated using the corresponding result of the DC component under the orthogonal component.

[0111] In the process of calculating the amplitude and phase angle, the reference signal in the DC component of the same phase is first obtained. , after normalizing it Set to 1, and then the amplitude of the signal to be measured can be calculated according to the formula in the equation group. and phase angle , specifically:

[0112] .

[0113] Optionally, the measured signal is updated based on the amplitude and phase angle, such as Figure 8 As shown, including:

[0114] Step S801, constructing a measurement signal corresponding to a DC component based on the amplitude and phase angle and using a time parameter;

[0115] Step S802: using the measurement signal to update the signal to be measured.

[0116] The measured signal is reconstructed using the calculated amplitude and phase angle and updated to the measured signal. In layman's terms, the measured signal is replaced by the measured signal, thereby eliminating the noise signal in the measured signal.

[0117] It can be seen from the ultrasonic signal processing method mentioned in the above embodiment that this method uses a phase-locked amplifier to extract useful ultrasonic signals from a strong noise background, which can not only identify the frequency of the signal to be measured, but also lock the phase of the signal. It can effectively filter the lamb waves generated on the surface of the medium when multiple groups of ultrasonic sensors work at the same time, so that multiple groups of ultrasonic sensors can be controlled simultaneously, solving the problem of low processing efficiency caused by time-sharing control.

[0118] Corresponding to the ultrasonic signal processing method provided in the aforementioned embodiment, an embodiment of the present invention provides an ultrasonic signal processing system, which is applied to the surface density measurement process of an ultrasonic measuring device; wherein, a plurality of groups of fixed-position ultrasonic sensors are arranged in the ultrasonic measuring device, and each group of ultrasonic sensors includes at least a pair of ultrasonic transducers and their corresponding phase-locked amplifiers.

[0119] like Fig. 9 As shown, the system includes:

[0120] The device deployment control module 910 is used to determine the layout parameters of the ultrasonic sensor based on the signal frequency parameters of the ultrasonic transducer, and to deploy the ultrasonic sensor in the ultrasonic measurement device using the layout parameters;

[0121] A reference signal determination module 920 is used to obtain the signal to be measured output by the ultrasonic sensor, and determine the reference signal corresponding to the signal to be measured using the frequency value of the signal to be measured;

[0122] A DC component acquisition module 930 is used to control the lock-in amplifier to calculate the product between the signal to be measured and the reference signal, and to obtain the DC component contained in the product;

[0123] The signal processing execution module 940 is used to calculate the amplitude and phase angle corresponding to the DC component based on the reference signal, and update the signal to be measured based on the amplitude and phase angle.

[0124] The ultrasonic signal processing system mentioned in the above embodiment can use a phase-locked amplifier to extract useful ultrasonic signals from a strong noise background, not only can it identify the frequency of the signal to be measured, but also can lock the phase of the signal, and can effectively filter the lamb waves generated on the surface of the medium when multiple groups of ultrasonic sensors work at the same time, so that multiple groups of ultrasonic sensors can be controlled simultaneously, solving the problem of low processing efficiency caused by time-sharing control.

[0125] The ultrasonic signal processing system provided in the embodiment of the present invention has the same implementation principle and technical effects as those of the aforementioned ultrasonic signal processing method embodiment. For the sake of brief description, for matters not mentioned in the system embodiment, reference may be made to the corresponding contents in the aforementioned ultrasonic signal processing method embodiment.

[0126] An embodiment of the present invention further provides an ultrasonic measuring device, in which a plurality of groups of fixed-position ultrasonic sensors are provided, each group of ultrasonic sensors comprising at least a pair of ultrasonic transducers and their corresponding phase-locked amplifiers; during the surface density measurement process, the ultrasonic measuring device adopts the steps of the ultrasonic signal processing method provided in the above embodiment.

[0127] This embodiment also provides an electronic device. The structural diagram of the electronic device is as follows: Fig.10 As shown, the device includes a processor 101 and a memory 102; wherein the memory 102 is used to store one or more computer instructions, and the one or more computer instructions are executed by the processor to implement the steps of the above-mentioned ultrasonic signal processing method.

[0128] Fig.10 The electronic device shown further includes a bus 103 and a communication interface 104 , and the processor 101 , the communication interface 104 and the memory 102 are connected via the bus 103 .

[0129] The memory 102 may include a high-speed random access memory (RAM), and may also include a non-volatile memory, such as at least one disk storage. The bus 103 may be an ISA bus, a PCI bus, or an EISA bus. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Fig.10 Only one bidirectional arrow is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0130] The communication interface 104 is used to connect to at least one user terminal and other network units through a network interface, and send the encapsulated IPv4 message or IPv4 message to the user terminal through the network interface.

[0131] The processor 101 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the hardware integrated logic circuit or software instructions in the processor 101. The above processor 101 can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The disclosed methods, steps and logic block diagrams in the embodiments of the present disclosure can be implemented or executed. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in conjunction with the embodiments of the present disclosure can be directly embodied as a hardware decoding processor for execution, or a combination of hardware and software modules in the decoding processor for execution. The software module may be located in a storage medium mature in the art, such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 102, and the processor 101 reads the information in the memory 102 and completes the steps of the method of the above embodiment in combination with its hardware.

[0132] An embodiment of the present invention further provides a storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the ultrasonic signal processing method in the above embodiment are executed.

[0133] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices, equipment and methods can be implemented in other ways. The system embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0134] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0135] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0136] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a non-volatile computer-readable storage medium that can be executed by a processor. Based on this understanding, the technical solution of the present invention can essentially or in other words, the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0137] Finally, it should be noted that the above-described embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed by the present invention, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. An ultrasonic signal processing method, characterized in that: The method is applied to the surface density measurement process of an ultrasonic measuring device; wherein the ultrasonic measuring device is provided with a plurality of groups of ultrasonic sensors with fixed positions, and each group of the ultrasonic sensors comprises at least a pair of ultrasonic transducers and their corresponding lock-in amplifiers; The method comprises: Determining layout parameters of the ultrasonic sensor based on the signal frequency parameters of the ultrasonic transducer, and deploying the ultrasonic sensor in the ultrasonic measuring device using the layout parameters; Acquire the signal to be measured output by the ultrasonic sensor, and determine the reference signal corresponding to the signal to be measured using the frequency value of the signal to be measured; Controlling the lock-in amplifier to calculate the product between the signal to be measured and the reference signal, and obtaining a DC component contained in the product; The amplitude and phase angle corresponding to the DC component are calculated based on the reference signal, and the signal to be measured is updated based on the amplitude and the phase angle.

2. The ultrasonic signal processing method according to claim 1, characterized in that: Determining the layout parameters of the ultrasonic sensor based on the signal frequency parameters of the ultrasonic transducer includes: Determining a frequency value corresponding to the ultrasonic transducer using a signal frequency parameter corresponding to the ultrasonic transducer; Sorting the frequency values ​​according to a preset frequency interval threshold, and determining the position parameters corresponding to each group of ultrasonic sensors according to the sorting result; The layout parameters corresponding to each group of the ultrasonic sensors are determined based on the position parameters.

3. The ultrasonic signal processing method according to claim 1, characterized in that: Deploying the ultrasonic sensors in the ultrasonic measuring device using the layout parameters includes: Determine a first position corresponding to the lock-in amplifier based on the layout parameters; wherein the lock-in amplifier in the first position is used to filter out noise signals generated by the adjacent ultrasonic transducer; Based on the layout parameters and the first position, determining a second position corresponding to the transmitting transducer in the ultrasonic sensor; Based on the layout parameters and the second position, determining a third position corresponding to the receiving transducer in the ultrasonic sensor; wherein the transmitting transducer and the receiving transducer are a pair of the ultrasonic transducers; The ultrasonic sensor is deployed according to the first position, the second position, and the third position.

4. The ultrasonic signal processing method according to claim 3, characterized in that: Acquiring a signal to be measured output by the ultrasonic sensor, and determining a reference signal corresponding to the signal to be measured using a frequency value of the signal to be measured, including: Acquire the signal to be measured output by the ultrasonic sensor based on a time parameter; wherein the signal to be measured includes the noise signal; Acquire a frequency value and a first amplitude of the signal to be measured, and use the first amplitude to determine a second amplitude and a phase difference value corresponding to the reference signal; The reference signal is constructed according to the second amplitude, the phase difference value and the frequency value.

5. The ultrasonic signal processing method according to claim 4, characterized in that: Controlling the lock-in amplifier to calculate the product between the signal to be measured and the reference signal, and obtaining a DC component contained in the product, comprising: Obtaining a phase-sensitive detector in the lock-in amplifier, and controlling the phase-sensitive detector to receive the signal to be measured and the reference signal; Controlling the phase-sensitive detector to calculate the product between the signal to be measured and the reference signal under the orthogonal component, and obtaining a first product and a second product corresponding to the orthogonal component based on the product; The DC component is obtained by controlling the lock-in amplifier to remove the AC component in the first product and the second product.

6. The ultrasonic signal processing method according to claim 5, characterized in that: Controlling the lock-in amplifier to remove the AC component in the first product and the second product to obtain the DC component comprises: Obtaining a low-pass filter in the lock-in amplifier, and determining an AC threshold corresponding to the low-pass filter; The low-pass filter is controlled to remove the AC component in the first product and the second product according to the AC threshold value to obtain the DC component.

7. The ultrasonic signal processing method according to claim 1, characterized in that: Calculating the amplitude and phase angle corresponding to the DC component based on the reference signal includes: Acquire the DC component with the same phase, and determine the reference signal contained in the DC component; After the DC component is normalized based on the amplitude of the reference signal, the amplitude and the phase angle are calculated using the corresponding result of the DC component under the orthogonal component.

8. The ultrasonic signal processing method according to claim 1, characterized in that: Updating the signal to be measured based on the amplitude and the phase angle includes: Based on the amplitude and the phase angle, a measurement signal corresponding to the DC component is constructed using a time parameter; The signal to be measured is updated using the measurement signal.

9. An ultrasonic signal processing system, characterized in that: The system is applied to the surface density measurement process of an ultrasonic measuring device; wherein the ultrasonic measuring device is provided with a plurality of groups of ultrasonic sensors with fixed positions, and each group of the ultrasonic sensors comprises at least a pair of ultrasonic transducers and their corresponding lock-in amplifiers; The system comprises: an equipment deployment control module, configured to determine layout parameters of the ultrasonic sensor based on the signal frequency parameters of the ultrasonic transducer, and to deploy the ultrasonic sensor in the ultrasonic measurement equipment using the layout parameters; A reference signal determination module, used to obtain the signal to be measured output by the ultrasonic sensor, and determine the reference signal corresponding to the signal to be measured using the frequency value of the signal to be measured; A DC component acquisition module, used for controlling the lock-in amplifier to calculate the product between the signal to be measured and the reference signal, and to acquire the DC component contained in the product; The signal processing execution module is used to calculate the amplitude and phase angle corresponding to the DC component based on the reference signal, and update the signal to be measured based on the amplitude and the phase angle.

10. An ultrasonic measuring device, characterized in that: The ultrasonic measuring device is provided with a plurality of groups of ultrasonic sensors with fixed positions, and each group of the ultrasonic sensors comprises at least a pair of ultrasonic transducers and their corresponding lock-in amplifiers; The ultrasonic measuring device adopts the steps of the ultrasonic signal processing method according to any one of claims 1 to 8 during the surface density measurement.

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