High-precision ultrasonic testing device and testing method

Abstract

The application relates to a high-precision ultrasonic detection device and a detection method. The device comprises a solid coupling ultrasonic scanning unit and an ultrasonic control detection processing unit. The ultrasonic scanning signal groups obtained are subjected to scanning signal detection processing by the ultrasonic control detection processing unit to generate object ultrasonic scanning information after the scanning signal detection processing. The scanning signal detection processing at least comprises signal-to-noise ratio improvement processing and scanning signal analysis processing. When the scanning signal detection processing is performed, the signal-to-noise ratio improvement processing is performed on each ultrasonic scanning signal, and the scanning signal analysis processing is performed on all the ultrasonic scanning signals subjected to the signal-to-noise ratio improvement processing to generate the object ultrasonic scanning information after the scanning signal analysis processing. When the solid coupling ultrasonic detection is adopted for the object to be detected, the signal-to-noise ratio of the received ultrasonic scanning signal can be improved, and the precision and reliability of the ultrasonic detection can be improved.

Description

TECHNICAL FIELD

[0001] The application relates to an ultrasonic detection device and a detection method, in particular to an ultrasonic detection device and a detection method with high precision. BACKGROUND

[0002] Ultrasonic waves are widely used in the field of industrial nondestructive testing due to their advantages of non-corrosion, high sensitivity and strong penetration. With the increasing popularity of new energy, the quality of batteries is also attracting more and more attention, and ultrasonic nondestructive testing is also applied to the field of new energy batteries.

[0003] Since the ultrasonic detection of batteries cannot use water as a sound-conducting medium, the current ultrasonic detection of batteries mainly has the following schemes: 1) using insulating silicon oil, 2) using air coupling, and 3) using solid coupling. Among them, the ultrasonic detection scheme using insulating silicon oil is mainly used in laboratory research and other scenes that are not sensitive to silicon oil pollution. The ultrasonic detection scheme using air coupling needs further exploration to obtain ideal sensitivity and signal-to-noise ratio because the ultrasonic wave attenuates very seriously in air. The ultrasonic detection scheme using solid coupling requires a solid material with good sound-conducting performance and small attenuation.

[0004] When performing ultrasonic detection on batteries produced by a battery production line, the battery pollution problem must be avoided first, so liquid coupling media such as silicon oil cannot be used, and the detection speed must be improved to meet the production capacity requirements of the production line. Therefore, a solid coupling scanning scheme that is simple and fast to operate needs to be developed and applied to the ultrasonic detection scene of the battery production line.

[0005] The application file with publication number CN109283259A discloses a solid-coupled ultrasonic scanning device, in which a solid-liquid combined ultrasonic transmission medium is adopted, the transducer is placed in a drum filled with liquid, the outer wall of the drum is in contact with the object to be detected, and the relative movement between the transducer and the object to be detected is realized by the rotation of the drum, thereby realizing ultrasonic mechanical scanning.

[0006] Based on the disclosure of CN109283259A, the ultrasonic scanning device for realizing ultrasonic detection has a simple structure and is easy to use, but the solid coupling cannot strictly guarantee the isotropy of the liquid coupling, and in addition, the attenuation of the ultrasonic signal is larger in solid coupling than in liquid coupling, which affects the signal-to-noise ratio of the obtained ultrasonic scanning signal and further affects the imaging quality. SUMMARY

[0007] The application aims to overcome the defects in the prior art, and provide a high-precision ultrasonic detection device and method, which can improve the signal-to-noise ratio of received ultrasonic scanning signals and improve the precision and reliability of ultrasonic detection when solid coupling ultrasonic detection is performed on a measured object.

[0008] According to the technical scheme provided by the application, a high-precision ultrasonic detection device comprises:

[0009] A solid coupling ultrasonic scanning unit is configured to perform solid coupling ultrasonic scanning on a measured object.

[0010] An ultrasonic control detection processing unit is connected to the solid coupling ultrasonic scanning unit and configured to control the solid coupling ultrasonic scanning unit to perform solid coupling ultrasonic scanning on the measured object to obtain a corresponding ultrasonic scanning signal group, wherein the ultrasonic scanning signal group comprises a plurality of ultrasonic scanning signals.

[0011] The ultrasonic control detection processing unit is configured to perform scanning signal detection processing on the obtained ultrasonic scanning signal group to generate object ultrasonic scanning information after the scanning signal detection processing.

[0012] The scanning signal detection processing comprises at least signal-to-noise ratio (SNR) improvement processing and scanning signal analysis processing.

[0013] The ultrasonic control detection processing unit is configured to perform SNR improvement processing on each ultrasonic scanning signal and perform scanning signal analysis processing on all the ultrasonic scanning signals after the SNR improvement processing to generate object ultrasonic scanning information after the scanning signal analysis processing.

[0014] The ultrasonic control detection processing unit comprises a scanning signal receiving processing module.

[0015] The scanning signal receiving processing module comprises an SNR improvement processing unit configured to perform SNR improvement processing and a scanning signal analysis processing unit configured to perform scanning signal analysis processing.

[0016] The SNR improvement processing unit and the scanning signal analysis processing unit are connected to each other.

[0017] The SNR improvement processing unit comprises a plurality of SNR improvement processing sub-units, and each ultrasonic scanning signal in the ultrasonic scanning signal group corresponds to one SNR improvement processing sub-unit in the SNR improvement processing unit.

[0018] For any SNR improvement processing sub-unit, the SNR improvement processing is performed on the ultrasonic scanning signal input into the SNR improvement processing sub-unit.

[0019] The signal-to-noise ratio improvement processing subunit performs signal-to-noise ratio improvement processing on the ultrasonic wave scanning signal, including signal-to-noise ratio improvement first processing and / or signal-to-noise ratio improvement second processing, wherein,

[0020] Before performing the signal-to-noise ratio improvement processing, the input ultrasonic wave scanning signal is converted to generate a corresponding ultrasonic wave scanning analog signal;

[0021] When performing the signal-to-noise ratio improvement first processing, at least including analog signal low-noise amplification processing, analog signal gain adjustment processing and / or analog signal filtering processing;

[0022] When performing the signal-to-noise ratio improvement second processing, the ultrasonic wave scanning analog signal or the ultrasonic wave scanning analog signal after the signal-to-noise ratio improvement first processing is first converted into a corresponding ultrasonic wave scanning digital signal,

[0023] At least signal amplitude consistency correction processing is performed on the converted ultrasonic wave scanning digital signal, so that after the signal amplitude consistency correction processing, the signal amplitudes of all ultrasonic wave scanning digital signals are consistent.

[0024] When the scanning signal analysis processing unit performs scanning signal analysis processing, it includes:

[0025] Obtain an ultrasonic scanning signal-to-noise ratio improvement signal;

[0026] Based on the type of the ultrasonic wave scanning signal, the ultrasonic scanning signal-to-noise ratio improvement signal is processed to generate an object ultrasonic scanning information, wherein the object ultrasonic scanning information includes scanning signal peak-to-peak value, scanning signal envelope, time of flight and / or spectral characteristics.

[0027] The solid-coupled ultrasonic wave scanning unit includes an ultrasonic wave transmitting solid-coupled unit and an ultrasonic wave receiving solid-coupled unit, wherein,

[0028] The ultrasonic wave transmitting solid-coupled unit includes at least one transmitting roller and an ultrasonic wave transmitting unit arranged in each transmitting roller;

[0029] The ultrasonic wave receiving solid-coupled unit includes at least one receiving roller and an ultrasonic wave receiving unit arranged in each receiving roller;

[0030] The transmitting roller in the ultrasonic wave transmitting solid-coupled unit corresponds to the receiving roller in the ultrasonic wave receiving solid-coupled unit;

[0031] When performing solid-coupled ultrasonic wave scanning on the object to be measured, the object to be measured is conveyed through the solid-coupled ultrasonic wave scanning unit, and during the process of passing through the solid-coupled ultrasonic wave scanning unit, the object to be measured is in rolling contact with the transmitting roller and the receiving roller;

[0032] When the object to be tested is transported through the solid-coupled ultrasonic scanning unit, the ultrasonic control detection processing unit drives the ultrasonic transmitting unit to transmit ultrasonic signals to the object to be tested, and the ultrasonic receiving unit receives the ultrasonic signals to generate an ultrasonic scanning signal group.

[0033] The ultrasonic transmitting unit includes a transmitting transducer unit, and the transmitting transducer unit includes a transmitting array transducer or a transmitting transducer group, wherein:

[0034] When the transmitting transducer unit is a transmitting array transducer, the transmitting array transducer includes a plurality of array transmitting transducer elements, and the array transmitting transducer elements in the transmitting array transducer are arranged in sequence along the axis direction of the transmitting roller;

[0035] When the transmitting transducer unit is a transmitting transducer group, the transmitting transducer group includes a plurality of single-element transmitting transducers, and the single-element transmitting transducers in the transmitting transducer group are arranged in sequence along the axis direction of the transmitting roller.

[0036] When the ultrasonic emission solid coupling unit includes a plurality of emission rollers, the plurality of emission rollers are arranged in sequence along the solid coupling ultrasonic scanning direction of the object to be measured, wherein:

[0037] When the transmitting transducer unit adopts a transmitting transducer group, the number of single-element transmitting transducers in each transmitting drum is consistent;

[0038] For any transmitting transducer group in the transmitting drum, the distance between the centers of two adjacent single-element transmitting transducers is z;

[0039] For any two adjacent transmitting rollers, along the direction in which the object to be measured passes through the solid-coupled ultrasonic scanning unit, the center of the single-element transmitting transducer in the latter transmitting roller is located below the center of the single-element transmitting transducer at the same sequential position in the former transmitting roller.

[0040] For any two adjacent transmitting rollers, the center distance between the two single-element transmitting transducers 32 at the same sequential position is z / n, where n is the number of transmitting rollers in the ultrasonic transmitting solid coupling unit 10 .

[0041] The ultrasonic control detection processing unit includes an excitation control module for driving an ultrasonic emitting unit, wherein:

[0042] The excitation control module is adaptively connected to all the transmitting transducer units to drive the transmitting transducer units to work;

[0043] When the transmitting transducer unit adopts a transmitting array transducer, the excitation control module adopts an electronic focusing method to control the working state of the corresponding transmitting array transducer to configure the transmitting transducer unit to perform ultrasonic focusing scanning on the object to be measured.

[0044] When the excitation control module controls the working state of the transmitting array transducer by using the electronic focusing method, at least the transmitting delay control, the transmitting aperture control and / or the amplitude apodization control are performed on the transmitting array transducer, so as to regulate the sound field energy of the ultrasonic waves emitted by the transmitting array transducer.

[0045] After the solid-coupled ultrasonic scanning is performed on the object to be measured, the ultrasonic control detection processing unit performs ultrasonic scanning signal reconstruction processing on the ultrasonic scanning signal group, wherein,

[0046] During the ultrasonic scanning signal reconstruction processing, the ultrasonic scanning signals corresponding to different receiving drums at different time points are extracted for the target imaging point on the object to be measured.

[0047] The extracted ultrasonic scanning signals are arranged based on the position information of the ultrasonic receiving unit, so as to generate position-reconstructed ultrasonic scanning signals.

[0048] Based on the above-mentioned position-reconstructed ultrasonic scanning signals, the ultrasonic scanning image of the object to be measured is generated.

[0049] A high-precision ultrasonic detection method, for any object to be measured suitable for solid-coupled ultrasonic scanning, uses the above-mentioned ultrasonic detection device to perform solid-coupled ultrasonic scanning detection on the object to be measured, so as to generate object ultrasonic scanning information of the object to be measured during the solid-coupled ultrasonic scanning detection.

[0050] The advantages of the present application are that, during the solid-coupled ultrasonic scanning process performed by the solid-coupled ultrasonic scanning unit on the object to be measured, the ultrasonic scanning signal group is obtained, and the ultrasonic scanning information of the object is generated by using the ultrasonic signal group; the signal-to-noise ratio of the ultrasonic scanning signal is improved by performing signal-to-noise ratio improvement processing and scanning signal analysis processing on the ultrasonic scanning signal, so as to improve the accuracy of the generated object scanning information. BRIEF DESCRIPTION OF DRAWINGS

[0051] Figure 1 An embodiment schematic diagram of the ultrasonic detection device of the present application.

[0052] Figure 2 An embodiment schematic diagram of the solid-coupled ultrasonic scanning unit of the present application performing solid-coupled ultrasonic scanning on the object to be measured.

[0053] Figure 3 An embodiment schematic diagram of the transmitting transducer unit of the present application using a group of transmitting transducers.

[0054] Figure 4Fig. 1 is a schematic diagram of an embodiment of the array transducer used for the transmitting transducer unit of the present application.

[0055] Figure 5 Fig. 2 is a schematic diagram of an embodiment of the data reconstruction of the present application.

[0056] BRIEF DESCRIPTION OF DRAWINGS 1 - ultrasonic control detection processing unit, 2 - excitation control module, 3 - receiving processing module, 4 - transmitting waveform control unit, 5 - transmitting delay control unit, 6 - amplitude apodization control unit, 7 - transmitting aperture control unit, 8 - transmitting channel, 9 - transmitting channel coaxial line, 10 - ultrasonic transmitting solid coupling unit, 11 - transmitting transducer unit, 12 - object to be detected, 13 - ultrasonic receiving solid coupling unit, 14 - receiving transducer unit, 15 - receiving channel coaxial line, 16 - receiving channel, 17 - analog front-end unit, 18 - digital filter, 19 - consistency correction unit, 20 - delay-and- sum unit, 21 - band-limiting filter unit, 22 - demodulation filter unit, 23 - envelope detection unit, 24 - first transmitting drum, 25 - second transmitting drum, 26 - third transmitting drum, 27 - fourth transmitting drum, 28 - first receiving drum, 29 - second receiving drum, 30 - third receiving drum, 31 - fourth receiving drum, 32 - single-element transmitting transducer, 33 - single-element receiving transducer, 34 - transmitting array transducer, 35 - array transmitting transducer element, 36 - peak-to-peak value calculation unit. DETAILED DESCRIPTION

[0057] The present application will be further described below in conjunction with specific drawings and embodiments.

[0058] When the ultrasonic wave detection is performed on the object to be detected 12 using the solid coupling, in order to improve the signal-to-noise ratio of the received ultrasonic scanning signals, improve the precision and reliability of the ultrasonic wave detection, the present application provides a high-precision ultrasonic wave detection device, specifically, the ultrasonic wave detection device comprises:

[0059] a solid-coupling ultrasonic scanning unit, configured to perform solid-coupling ultrasonic scanning on the object to be detected 12;

[0060] an ultrasonic control detection processing unit 1, connected to the solid-coupling ultrasonic scanning unit, configured to control the solid-coupling ultrasonic scanning unit to perform solid-coupling ultrasonic scanning on the object to be detected 12, so as to obtain a corresponding ultrasonic scanning signal group when the object to be detected 12 is subjected to the solid-coupling ultrasonic scanning, wherein the ultrasonic scanning signal group comprises a plurality of ultrasonic scanning signals;

[0061] the ultrasonic control detection processing unit 1 is configured to perform scanning signal detection processing on the obtained ultrasonic scanning signal group, so as to generate object ultrasonic scanning information after the scanning signal detection processing is performed, wherein

[0062] Scanning signal detection processing includes at least signal-to-noise ratio improvement processing and scanning signal analysis processing, wherein:

[0063] When performing scanning signal detection processing, each ultrasonic scanning signal is subjected to signal-to-noise ratio enhancement processing, and scanning signal analysis processing is performed on all ultrasonic scanning signals subjected to signal-to-noise ratio enhancement processing to generate object ultrasonic scanning information after the scanning signal analysis processing.

[0064] It should be understood that the object 12 to be tested should be of a type suitable for solid-coupled ultrasonic testing. The object 12 to be tested can be a commonly used product or sample, such as the lithium-ion battery described in Publication No. CN109283259A. The type of the object 12 to be tested can be selected according to actual needs, and examples are not provided here. When performing solid-coupled ultrasonic testing on the object 12 to be tested, a solid-coupled ultrasonic scanning unit compatible with the object 12 to be tested should be provided. Thereafter, the solid-coupled ultrasonic scanning unit can be used to perform solid-coupled ultrasonic scanning on the object 12 to be tested. After the solid-coupled ultrasonic scanning, a corresponding ultrasonic scanning signal group can be obtained. It should be noted that the ultrasonic scanning signal group is composed of multiple ultrasonic scanning signals at a certain moment during the solid-coupled ultrasonic scanning of the object 12 to be tested. At this time, the object 12 to be tested is in a certain ultrasonic scanning position corresponding to the solid-coupled ultrasonic scanning unit. That is, the ultrasonic scanning signal group generally corresponds to the solid-coupled ultrasonic scanning position state of the object 12 to be tested.

[0065] In order to control the solid-coupled ultrasonic scanning of the object to be measured 12, the solid-coupled ultrasonic scanning unit should be adaptively connected to the ultrasonic control detection processing unit 1. The ultrasonic control detection processing unit 1 can control the solid-coupled ultrasonic scanning process of the object to be measured 12. It can be seen from the above description that when the solid-coupled ultrasonic scanning process of the object to be measured 12 is completed, the corresponding ultrasonic scanning signal group can be obtained.

[0066] The ultrasonic scanning signal group includes several ultrasonic scanning signals. It should be noted that the ultrasonic scanning signal can be an ultrasonic transmission signal and / or an ultrasonic reflection signal. The ultrasonic transmission signal is generally an ultrasonic signal that passes through the object to be measured 12, and the ultrasonic reflection signal is generally an ultrasonic signal that is reflected by the object to be measured 12. The type of ultrasonic scanning signal is related to the solid-coupled ultrasonic scanning method of the object to be measured 12 and can be selected and determined by the ultrasonic control detection processing unit 1.

[0067] After obtaining the group of ultrasonic scanning signals, the ultrasonic control detection processing unit 1 needs to perform scanning signal detection processing, and after performing the scanning signal detection processing, the object ultrasonic scanning information can be generated. It can be understood that the scanning state of the object 12 at a certain time / position can be determined according to the object ultrasonic scanning information. It can be understood that after the solid coupling ultrasonic scanning of the object 12 is completed, the corresponding object ultrasonic detection information can be generated based on all the object ultrasonic scanning information, and the detection state of the object 12 can be determined according to the object ultrasonic detection information, wherein the detection state of the object 12 can be whether the object 12 has defects and the like, and the detection state of the object 12 can be related to the type of the object 12 and the purpose of performing the solid coupling ultrasonic scanning on the object 12. The way and process of determining the detection state of the object 12 according to the object ultrasonic detection information can be consistent with the prior art, which will not be illustrated here.

[0068] The scanning signal detection processing performed by the ultrasonic control detection processing unit 1 includes at least signal-to-noise ratio improvement processing and scanning signal analysis processing in an embodiment of the present application. Specifically, when performing the scanning signal detection processing, the signal-to-noise ratio of each ultrasonic scanning signal should be improved first, and then the scanning signal analysis processing is performed on all the ultrasonic scanning signals after the signal-to-noise ratio improvement processing, so as to generate the object ultrasonic scanning information after the scanning signal analysis processing. It can be understood that the signal-to-noise ratio of each ultrasonic scanning signal is improved, and then the scanning signal analysis processing is performed, so as to improve the accuracy of generating the object ultrasonic scanning information, further improve the accuracy of generating the object ultrasonic detection information, and improve the accuracy and reliability of the ultrasonic detection of the object 12.

[0069] The way and process of the scanning signal detection processing performed by the ultrasonic control detection processing unit 1 will be explained in detail below.

[0070] In an embodiment of the present application, the ultrasonic control detection processing unit 1 includes a scanning signal receiving processing module 3,

[0071] The scanning signal receiving processing module 3 includes a signal-to-noise ratio improvement processing unit for performing signal-to-noise ratio improvement processing and a scanning signal analysis processing unit for performing scanning signal analysis processing, wherein

[0072] The signal-to-noise ratio improvement processing unit and the scanning signal analysis processing unit are adaptively connected;

[0073] The signal-to-noise ratio improvement processing unit includes a plurality of signal-to-noise ratio improvement processing subunits, wherein the ultrasonic scanning signals in the ultrasonic scanning signal group correspond one to one with the signal-to-noise ratio improvement processing subunits in the signal-to-noise ratio improvement processing unit;

[0074] For any signal-to-noise ratio improvement processing subunit, a signal-to-noise ratio improvement process is performed on the ultrasonic scanning signal input to the signal-to-noise ratio improvement processing subunit.

[0075] In order to perform scanning signal detection processing, the ultrasonic control detection processing unit 1 should include a scanning signal receiving processing module 3, such as Figure 1 As shown, at this time, the scanning signal receiving and processing module 3 can be used to implement scanning signal detection processing of the ultrasonic scanning signal group. Specifically, the scanning signal receiving and processing module 3 may include a signal-to-noise ratio enhancement processing unit and a scanning signal analysis processing unit, wherein the signal-to-noise ratio enhancement processing unit can be used to perform signal-to-noise ratio enhancement processing on each ultrasonic scanning signal; for all ultrasonic scanning signals after signal-to-noise ratio enhancement processing, the scanning signal analysis processing unit can be used to perform scanning signal analysis processing, and the signal-to-noise ratio enhancement unit and the scanning signal analysis processing unit are adaptively connected so that the scanning signal receiving and processing module 3 can perform the above-mentioned scanning signal detection processing process.

[0076] In a specific implementation, the signal-to-noise ratio improvement processing unit includes several signal-to-noise ratio improvement processing sub-units. The ultrasonic scanning signals in the ultrasonic scanning signal group correspond one-to-one to the signal-to-noise ratio improvement processing sub-units in the signal-to-noise ratio improvement processing unit. Therefore, for each ultrasonic scanning signal, one signal-to-noise ratio improvement processing sub-unit can be used to perform the above-mentioned signal-to-noise ratio improvement processing.

[0077] In one embodiment of the present invention, the signal-to-noise ratio improvement processing performed by the signal-to-noise ratio improvement processing subunit on the ultrasonic scanning signal includes a first signal-to-noise ratio improvement processing and / or a second signal-to-noise ratio improvement processing, wherein:

[0078] Before performing signal-to-noise ratio enhancement processing, the input ultrasonic scanning signal is converted into a corresponding ultrasonic scanning analog signal;

[0079] When performing the first signal-to-noise ratio improvement process, it at least includes analog signal low-noise amplification processing, analog signal gain adjustment processing and / or analog signal filtering processing;

[0080] When performing the second signal-to-noise ratio improvement process, the ultrasonic scanning analog signal or the ultrasonic scanning analog signal after the first signal-to-noise ratio improvement process is first converted into a corresponding ultrasonic scanning digital signal.

[0081] The signal amplitude consistency correction processing is performed on the converted ultrasonic scanning digital signal, so that the signal amplitudes of all the ultrasonic scanning digital signals are consistent after the signal amplitude consistency correction processing.

[0082] As can be seen from the above description, the signal-to-noise ratio improvement processing subunit can perform signal-to-noise ratio improvement processing on each ultrasonic scanning signal. It can be understood that the signal-to-noise ratio improvement processing performed by different signal-to-noise ratio improvement processing subunits can be different. Preferably, in an embodiment of the present application, all the signal-to-noise ratio improvement processing subunits perform the same signal-to-noise ratio improvement processing. For any signal-to-noise ratio improvement processing subunit, the signal-to-noise ratio improvement processing performed can include signal-to-noise ratio improvement first processing and / or signal-to-noise ratio improvement second processing, that is, the signal-to-noise ratio improvement processing unit can only perform signal-to-noise ratio improvement first processing or signal-to-noise ratio improvement second processing, or can perform signal-to-noise ratio improvement first processing and signal-to-noise ratio improvement second processing. Specifically, when performing signal-to-noise ratio improvement first processing and signal-to-noise ratio improvement second processing, it can be preferred to perform signal-to-noise ratio improvement first processing first, and then perform signal-to-noise ratio improvement second processing after performing signal-to-noise ratio improvement first processing.

[0083] It should be noted that, since the ultrasonic scanning signal is a mechanical wave, it is necessary to convert the ultrasonic scanning signal into an ultrasonic scanning analog signal before performing signal-to-noise ratio improvement. The conversion of the ultrasonic scanning signal into the ultrasonic scanning analog signal can be consistent with the prior art, such as converting the ultrasonic scanning signal into the corresponding ultrasonic scanning analog signal through piezoelectric conversion. After converting the ultrasonic scanning signal into the ultrasonic scanning analog signal, signal-to-noise ratio improvement first processing or signal-to-noise ratio improvement second processing should be performed on the ultrasonic scanning analog signal.

[0084] Specifically, the signal-to-noise ratio improvement first processing performed on the ultrasonic scanning analog signal can at least include analog signal low-noise amplification processing, analog signal gain adjustment processing, and / or analog signal filtering processing. The analog signal low-noise amplification processing specifically refers to amplifying the ultrasonic scanning analog signal. The analog signal gain adjustment processing specifically refers to adjusting the gain of the ultrasonic scanning analog signal. The analog signal filtering processing specifically refers to filtering processing of the ultrasonic scanning analog signal. Of course, the signal-to-noise ratio improvement first processing performed can simultaneously include analog signal low-noise amplification processing, analog signal gain adjustment processing, and analog signal filtering processing, or one or more of the analog signal low-noise amplification processing, analog signal gain adjustment processing, and analog signal filtering processing can be selected according to actual scene requirements.

[0085] After performing the signal-to-noise ratio improvement first processing on the ultrasonic scanning analog signal, an ultrasonic scanning signal-to-noise ratio improvement first processing after signal can be obtained. It should be noted that the ultrasonic scanning signal-to-noise ratio improvement first processing after signal is still an analog signal.

[0086] As can be seen from the above description, the signal-to-noise ratio improvement processing performed by the signal-to-noise ratio improvement processing subunit can be signal-to-noise ratio improvement first processing and / or signal-to-noise ratio improvement second processing, and thus, when performing the signal-to-noise ratio improvement second processing, the processed object can be the ultrasonic scanning analog signal or the ultrasonic scanning analog signal after the signal-to-noise ratio improvement first processing, that is, the object of the signal-to-noise ratio improvement second processing is the ultrasonic scanning analog signal or the ultrasonic scanning signal after the signal-to-noise ratio improvement first processing. Specifically, when the signal-to-noise ratio improvement processing subunit only performs the signal-to-noise ratio improvement second processing, the object of the signal-to-noise ratio improvement second processing should be the ultrasonic scanning signal, and when the signal-to-noise ratio improvement processing subunit simultaneously performs the signal-to-noise ratio improvement first processing and the signal-to-noise ratio improvement second processing, the object of the signal-to-noise ratio improvement second processing should be the ultrasonic scanning signal after the signal-to-noise ratio improvement first processing.

[0087] When performing the signal-to-noise ratio improvement second processing, the ultrasonic scanning analog signal or the ultrasonic scanning signal after the signal-to-noise ratio improvement first processing can be analog-to-digital converted to obtain an ultrasonic scanning digital signal after analog-to-digital conversion. The obtained ultrasonic scanning digital signal is at least subjected to signal amplitude consistency correction processing; specifically, when performing the signal amplitude consistency correction processing, the signal amplitudes of all ultrasonic scanning digital signals should be consistent. Specifically, when performing analog-to-digital conversion, the ultrasonic scanning analog signal or the ultrasonic scanning signal after the signal-to-noise ratio improvement first processing can be sampled to generate a corresponding ultrasonic scanning digital signal, and thus, the ultrasonic scanning digital signal, which is a discrete signal corresponding to the ultrasonic scanning analog signal or the ultrasonic scanning signal after the signal-to-noise ratio improvement first processing, still has the characteristics of the corresponding analog signal, and thereafter, all ultrasonic scanning digital signals can be subjected to signal amplitude consistency correction processing.

[0088] In specific implementation, a signal amplitude target value can be set according to the type of the object to be measured 12, so that when performing the signal amplitude consistency correction processing, the signal amplitudes of all ultrasonic scanning digital signals are corrected to the signal amplitude target value. The signal amplitude target value can also be dynamically adjusted according to the state of all ultrasonic scanning digital signals, such as configuring the average value or the median value of the signal amplitudes of all ultrasonic scanning digital signals as the signal amplitude target value. The setting mode of the signal amplitude target value can be selected according to actual needs, so as to meet the requirement of obtaining the required object ultrasonic scanning signal.

[0089] Figure 1 The ultrasonic detection device is an embodiment of the present application, and as can be seen from the figure, when performing solid coupling ultrasonic scanning on the object to be measured 12, the obtained ultrasonic scanning signal group should be an ultrasonic transmission signal group, and at this time, the ultrasonic scanning signal should be an ultrasonic transmission signal. In addition, Figure 1An embodiment of the SNR improvement processing subunit is shown in the figure. The SNR improvement processing subunit comprises, in sequence, a receiving channel 16, an analog front-end unit 17, a digital filter 18, and a consistency correction unit 19. In the embodiment, the receiving channel 16 is configured to receive an ultrasonic transmission signal, and the analog front-end unit 17 is configured to convert the ultrasonic transmission signal into an ultrasonic transmission analog signal and load the ultrasonic transmission analog signal to the receiving channel 16, and perform analog signal low-noise amplification processing, analog signal gain adjustment processing, and / or analog signal filtering processing on the ultrasonic transmission analog signal.

[0090] The ultrasonic transmission analog signal is converted from the ultrasonic transmission signal, and the ultrasonic transmission analog signal is loaded to the receiving channel 16, and analog signal low-noise amplification processing, analog signal gain adjustment processing, and / or analog signal filtering processing is performed on the ultrasonic transmission analog signal. That is, the receiving channel 16 can perform first SNR improvement processing on the ultrasonic scanning analog signal, so that the receiving channel 16 can obtain the ultrasonic transmission signal after the first SNR improvement processing.

[0091] In a specific implementation, when the receiving channel 16 is used to perform analog signal low-noise amplification processing, it is necessary to ensure that the analog signal is amplified while the influence of noise is reduced as much as possible. Generally, a low-noise amplifier (LNA) can be arranged in the receiving channel 16 to perform analog signal low-noise amplification processing. In this case, the low-noise amplifier should have a very low noise factor, which means that it will not introduce too much noise while amplifying the signal. In addition, it should also have good linearity to avoid signal distortion. Therefore, a corresponding low-noise amplifier can be selected according to the above description.

[0092] When the receiving channel 16 is used to perform analog signal gain adjustment processing, the amplitude of the analog signal should be adjusted to meet the needs of subsequent processing and compensate for the attenuation of the ultrasonic signal at different depths. Specifically, a time gain compensation (TGC) circuit can be arranged in the receiving channel 16. The time gain compensation circuit can dynamically adjust the gain according to the change of the signal propagation distance to ensure that the deep and shallow structures have good visibility. It should be noted that the time gain compensation circuit can adopt a commonly used form to achieve analog signal gain adjustment.

[0093] When the receiving channel 16 is used to perform analog signal filtering processing, the frequency components that are not needed should be filtered out and the useful signals should be retained. Specifically, an analog signal filter can be arranged in the receiving channel 16 to perform analog signal filtering processing. The analog signal filter should be able to effectively remove noise and other interference signals while keeping the main characteristics of the signal unchanged. The analog signal filtering processing can adopt a common filter type, such as a low-pass filter, a high-pass filter, or a band-pass filter. The type of analog signal filter should be able to meet the requirements of analog signal filtering processing.

[0094] The signal after the first processing of the ultrasonic transmission signal noise ratio improvement is loaded to the analog front-end unit 17. The analog front-end unit 17 mainly performs analog-to-digital conversion on the signal after the first processing of the ultrasonic transmission signal noise ratio improvement, to generate an ultrasonic transmission digital signal after the analog-to-digital conversion. The digital filter 18 can perform digital filtering on the ultrasonic transmission digital signal, and the signal amplitude correction unit 19 performs signal amplitude correction after the digital filtering, so that the ultrasonic transmission digital signal with consistent signal amplitudes can be obtained. Therefore, the analog front-end unit 17, the digital filter 18, and the signal amplitude correction unit 19 can perform the second processing of the signal noise ratio improvement.

[0095] As can be seen from the above description, for each ultrasonic scanning signal, the ultrasonic scanning signal noise ratio improvement signal can be generated after the first processing of the signal noise ratio improvement and the second processing of the signal noise ratio improvement, and the amplitudes of the plurality of ultrasonic scanning signal noise ratio improvement signals are consistent.

[0096] As can be seen from the above description, Figure 1 An embodiment in which the signal noise ratio improvement processing subunit can simultaneously perform the first processing of the signal noise ratio improvement and the second processing of the signal noise ratio improvement is shown in FIG. 6. It should be noted that the receiving channel 16, the analog front-end unit 17, the digital filter 18, and the signal amplitude correction unit 19 can adopt existing common circuits or modules, and the specific requirements are to meet the requirements of the first processing of the signal noise ratio improvement and the second processing of the signal noise ratio improvement.

[0097] It should be noted that, Figure 1 In addition, only an embodiment in which the ultrasonic scanning signal is an ultrasonic transmission signal is shown in the above description. When the ultrasonic scanning signal is an ultrasonic reflection signal, the corresponding description in the above description can be referred to. Figure 1 In addition, the above description, that is, the manner and process of performing the signal noise ratio improvement processing on the ultrasonic reflection signal can be referred to the corresponding description in the above description, and will not be described here.

[0098] In an embodiment of the present application, when the scanning signal analysis processing unit performs scanning signal analysis processing, the following steps are included:

[0099] Obtaining the ultrasonic scanning signal noise ratio improvement signal;

[0100] Based on the type of the ultrasonic scanning signal, the ultrasonic scanning signal noise ratio improvement signal is processed to generate the object ultrasonic scanning information, wherein the object ultrasonic scanning information includes the scanning signal peak-to-peak value, the scanning signal envelope, the time of flight, and / or the spectral characteristics.

[0101] Specifically, when performing the scanning signal analysis processing, the ultrasonic scanning signal noise ratio improvement signal needs to be obtained, wherein the ultrasonic scanning signal noise ratio improvement signal should be generated after the signal noise ratio improvement processing on the ultrasonic scanning signal, such as Figure 1As can be seen from the above description, when the ultrasonic scanning signal is an ultrasonic transmission signal, the ultrasonic scanning signal-to-noise ratio improvement signal can be output by the consistency correction unit 19. After the ultrasonic scanning signal-to-noise ratio improvement signal is obtained, the ultrasonic scanning signal-to-noise ratio improvement signal is processed based on the type of the ultrasonic scanning signal to generate the object ultrasonic scanning information, wherein the object ultrasonic scanning information includes a scanning signal peak-to-peak value, a scanning signal envelope, a time of flight, and / or a spectral feature. According to the type of the ultrasonic scanning signal, the ultrasonic scanning signal-to-noise ratio improvement signal is processed to generate the object ultrasonic scanning information. The manner and process of generating the object ultrasonic scanning information, such as the scanning signal peak-to-peak value or the scanning signal envelope, will be described in detail below, and can be referred to the corresponding description below.

[0102] It should be noted that when the object ultrasonic scanning information is a time of flight or a spectral feature, the corresponding time of flight or spectral feature can be determined by using the existing common technical means. The manner of obtaining the time of flight or the spectral feature can be consistent with the existing technology, and the time of flight and the spectral feature required can be obtained. Here, no further example is given.

[0103] In an embodiment of the present application, the solid-coupled ultrasonic scanning unit includes an ultrasonic transmitting solid-coupled unit 10 and an ultrasonic receiving solid-coupled unit 13, wherein,

[0104] The ultrasonic transmitting solid-coupled unit 10 includes at least one transmitting roller and an ultrasonic transmitting unit arranged in each transmitting roller;

[0105] The ultrasonic receiving solid-coupled unit 13 includes at least one receiving roller and an ultrasonic receiving unit arranged in each receiving roller;

[0106] The transmitting roller in the ultrasonic transmitting solid-coupled unit 10 corresponds to the receiving roller in the ultrasonic receiving solid-coupled unit 13;

[0107] When the object 12 to be measured is subjected to solid-coupled ultrasonic scanning, the object 12 to be measured is conveyed through the solid-coupled ultrasonic scanning unit, and in the process of conveying through the solid-coupled ultrasonic scanning unit, the object 12 to be measured is in rolling contact with the transmitting roller and the receiving roller;

[0108] In the process of conveying the object 12 to be measured through the solid-coupled ultrasonic scanning unit, the ultrasonic control detection processing unit 1 drives the ultrasonic transmitting unit to transmit ultrasonic signals to the object 12 to be measured, and the ultrasonic receiving unit receives the ultrasonic scanning signal group.

[0109] Figure 1An embodiment of the solid-coupled ultrasonic scanning unit is shown in FIG. 1, which includes an ultrasonic transmitting solid-coupled unit 10 and an ultrasonic receiving solid-coupled unit 13. The ultrasonic transmitting solid-coupled unit 10 and the ultrasonic receiving solid-coupled unit 13 are arranged correspondingly to enable solid-coupled ultrasonic scanning of an object 12 to be measured. In the solid-coupled ultrasonic scanning of the object 12 to be measured, the object 12 to be measured is located between the ultrasonic transmitting solid-coupled unit 10 and the ultrasonic receiving solid-coupled unit 13.

[0110] Specifically, the ultrasonic transmitting solid-coupled unit 10 includes at least one transmitting roller and an ultrasonic transmitting unit arranged in each transmitting roller. The ultrasonic receiving solid-coupled unit 13 includes at least one receiving roller and an ultrasonic receiving unit arranged in each receiving roller. Generally, the number of transmitting rollers is consistent with the number of receiving rollers, and the transmitting rollers and the receiving rollers are distributed in one-to-one correspondence. The transmitting rollers and the receiving rollers can adopt the form disclosed in CN109283259A. In addition, the manner of performing solid-coupled ultrasonic scanning of the object 12 to be measured by using the ultrasonic transmitting solid-coupled unit 10 and the ultrasonic receiving solid-coupled unit 13 can refer to the corresponding description in CN109283259A.

[0111] It should be noted that, in the solid-coupled ultrasonic scanning of the object 12 to be measured, the object 12 to be measured needs to be conveyed and pass through the solid-coupled ultrasonic scanning unit. Specifically, during the process of the object 12 to be measured passing through the solid-coupled ultrasonic scanning unit, the object 12 to be measured is in rolling contact with the corresponding transmitting rollers and receiving rollers in the conveying direction of the object 12 to be measured, until the object 12 to be measured is conveyed to pass through the solid-coupled ultrasonic scanning unit. Therefore, the transmitting rollers and the receiving rollers should be kept in a rotatable state after being assembled.

[0112] In order to obtain the ultrasonic scanning signal group, the ultrasonic control and detection processing unit 1 controls the ultrasonic transmitting unit to emit ultrasonic signals to the object 12 to be measured during the process of conveying the object 12 to be measured to pass through the solid-coupled ultrasonic scanning unit. Thereafter, the ultrasonic receiving units receive the generated ultrasonic signals, so as to obtain the ultrasonic scanning signal group. As can be seen from the above description, Figure 1 In the embodiment shown in FIG. 1, the ultrasonic scanning signals in the ultrasonic scanning signal group are ultrasonic transmission signals. Of course, after the ultrasonic transmitting unit emits ultrasonic signals to the object 12 to be measured, the ultrasonic receiving unit can also be configured to receive ultrasonic signals. At this time, the ultrasonic transmitting unit can receive ultrasonic reflection signals, that is, the ultrasonic scanning signals can also be ultrasonic reflection signals.

[0113] In one embodiment of the present application, the ultrasonic wave transmitting unit comprises a transmitting transducer unit 11, which comprises a transmitting array transducer 34 or a transmitting transducer group, wherein,

[0114] When the transmitting transducer unit 11 is the transmitting array transducer 34, the transmitting array transducer 34 comprises a plurality of array transmitting transducer elements 35, which are arranged along the axis of the transmitting roller in sequence.

[0115] When the transmitting transducer unit 11 is the transmitting transducer group, the transmitting transducer group comprises a plurality of single-array-element transmitting transducers 32, which are arranged along the axis of the transmitting roller in sequence.

[0116] Figure 1 An embodiment of the ultrasonic wave transmitting unit is shown in FIG. 1, in which the ultrasonic wave transmitting unit adopts the transmitting transducer unit 11, i.e. the ultrasonic wave is transmitted by the transducer; the transmitting transducer unit 11 can be the transmitting array transducer 34 or the transmitting transducer group; in addition, Figure 1 An embodiment of the ultrasonic wave receiving unit is also shown in FIG. 1, in which the ultrasonic wave receiving unit adopts the receiving transducer unit 14; it can be understood that the receiving transducer unit 14 can be the receiving array transducer or the receiving transducer group, and the type adopted by the receiving transducer unit 14 should be consistent with the type adopted by the transmitting transducer unit 11, e.g. when the transmitting transducer unit 11 adopts the transmitting array transducer 34, the receiving transducer unit 14 should also adopt the receiving array transducer; when the transmitting transducer unit 11 adopts the transmitting transducer group, the receiving transducer unit 14 should adopt the receiving transducer group.

[0117] For any transmitting array transducer 34, the transmitting array transducer 34 comprises a plurality of array transmitting transducer elements 35, at this time, the array transmitting transducer elements 35 are arranged in an array, a plurality of array transmitting transducer elements 35 are arranged along the axis of the transmitting roller, and all the array transmitting transducer elements 35 are coaxially distributed, Figure 4 An embodiment of the distribution of the array transmitting transducer elements 35 is shown in FIG. 2; when working, the transmitting roller is generally vertically distributed, at this time, a plurality of array transmitting transducer elements 35 are arranged in an array, therefore, the direction of the array distribution is also vertical, and the length of the transmitting array transducer 34 should be less than the height of the transmitting roller, which is specifically determined according to the solid coupling ultrasonic wave scanning of the measured object 12.

[0118] For any transmitting transducer group, the transmitting transducer group comprises a plurality of single-element transmitting transducers 32, that is, one array element is arranged in the single-element transmitting transducer 32, the single-element transmitting transducers 32 in the transmitting transducer group are arranged in sequence along the axial direction of the transmitting roller, and all the single-element transmitting transducers 32 are coaxially distributed, as shown in Figure 2 and Figure 3 The arrangement of the single-element transmitting transducers 32 along the axial direction of the transmitting roller can refer to the above description of the array transmitting transducer array element 35 distribution.

[0119] In specific implementation, when the receiving transducer unit 14 adopts a receiving array transducer or a receiving transducer group, the specific implementation can refer to the above description corresponding to the transmitting array transducer 34 and the transmitting transducer group, that is, the difference between the receiving transducer unit 14 and the transmitting transducer unit 11 is only the position of the roller and the state of the configured ultrasonic emission or ultrasonic reception, and the others can adopt the same setting. For the case of the receiving transducer unit 14, this will not be specifically explained and described here.

[0120] In an embodiment of the present application, when the ultrasonic emission solid coupling unit 10 comprises a plurality of transmitting rollers, the plurality of transmitting rollers are arranged in sequence along the direction of the solid coupling ultrasonic wave scanning of the object to be measured 12, wherein,

[0121] When the transmitting transducer unit 11 adopts a transmitting transducer group, the number of single-element transmitting transducers 32 in each transmitting roller is consistent;

[0122] For any transmitting transducer group in any transmitting roller, the distance between the centers of two adjacent single-element transmitting transducers 32 is z;

[0123] For any two adjacent transmitting rollers, along the direction of the object to be measured 12 passing through the solid coupling ultrasonic wave scanning unit, the center of the single-element transmitting transducer 32 in the latter transmitting roller is located below the center of the single-element transmitting transducer 32 in the same sequence position in the former transmitting roller.

[0124] In order to improve the imaging resolution, in the embodiment, according to the type of the object 12 to be detected, a plurality of transmitting rollers can be arranged in the ultrasonic transmitting solid-coupling unit 10, the plurality of transmitting rollers are arranged in sequence, and the arrangement direction of the plurality of transmitting rollers is consistent with the direction of the solid-coupling ultrasonic wave scanning on the object 12 to be detected, for example, the arrangement direction of the plurality of transmitting rollers is perpendicular to the axial direction of the transmitting roller. Since the receiving roller should be arranged in correspondence with the transmitting roller, when a plurality of transmitting rollers are arranged in the ultrasonic transmitting solid-coupling unit 10, the same number of receiving rollers should be arranged in the ultrasonic receiving solid-coupling unit 13, that is, it is necessary to ensure that the number of receiving rollers is consistent with the number of transmitting rollers, and the receiving rollers and the transmitting rollers are arranged in correspondence, so as to meet the requirement of the solid-coupling ultrasonic wave scanning on the object 12 to be detected.

[0125] When a plurality of transmitting rollers are arranged, the transmitting transducer unit 11 is arranged in each transmitting roller; similarly, when a plurality of receiving rollers are arranged, the receiving transducer unit 14 needs to be arranged in each receiving roller. It should be noted that when the transmitting transducer unit 11 adopts the transmitting array transducer 34, based on the characteristics of the transmitting array transducer 34, only one transmitting roller can be arranged in the ultrasonic transmitting solid-coupling unit 10; when the transmitting transducer unit 11 adopts the transmitting transducer group, a plurality of transmitting rollers should be arranged in the ultrasonic transmitting solid-coupling unit 10. Figure 2 An embodiment in which four transmitting rollers are arranged in the ultrasonic transmitting solid-coupling unit 10 when the transmitting transducer unit 11 adopts the transmitting transducer group is shown in FIG. 4. At this time, four receiving rollers should be arranged in the ultrasonic receiving solid-coupling unit 13.

[0126] In the embodiment, when the transmitting transducer unit 11 adopts the transmitting transducer group, the number of single-element transmitting transducers 32 in each transmitting roller is consistent. As known from the above description, the number of single-element receiving transducers 32 in each receiving roller is also the same, and is consistent with the number of single-element transmitting transducers 32 in the transmitting roller. Of course, when the transmitting transducer unit 11 adopts the transmitting array transducer 34, the number of array transmitting transducer elements 35 is also preferably consistent with the number of array receiving transducer elements.

[0127] In the embodiment, when the transmitting transducer unit 11 adopts the transmitting transducer group, the number of single-element transmitting transducers 32 in each transmitting roller is consistent. As known from the above description, the number of single-element receiving transducers 32 in each receiving roller is also the same, and is consistent with the number of single-element transmitting transducers 32 in the transmitting roller. Of course, when the transmitting transducer unit 11 adopts the transmitting array transducer 34, the number of array transmitting transducer elements 35 is also preferably consistent with the number of array receiving transducer elements. Figure 2As can be seen from the above description, in any transmitting drum, the plurality of single-array transmitting transducers 32 are coaxially distributed, and the distance between the centers of two adjacent single-array transmitting transducers 32 is z; for two adjacent transmitting drums, the distance between the centers of the corresponding single-array transmitting transducers 32 in the two transmitting drums is x. Thus, for any receiving drum, the plurality of single-array receiving transducers 33 are also coaxially distributed, and the distance between the centers of two adjacent single-array receiving transducers 33 is z; for two adjacent receiving drums, the distance between the centers of the corresponding single-array receiving transducers 33 in the two receiving drums is also x.

[0128] In addition, for any two adjacent transmitting drums, along the direction in which the object 12 passes through the solid-coupling ultrasonic scanning unit, the center of a single-array transmitting transducer 32 in the latter transmitting drum is located below the center of a single-array transmitting transducer 32 in the former transmitting drum at the same sequential position. The following Figure 2 The distribution position relationship between the single-array transmitting transducers 32 in adjacent transmitting drums is explained and described.

[0129] Figure 2 An embodiment in which the ultrasonic transmitting solid-coupling unit 10 includes a plurality of transmitting drums is shown in FIG. 2. In the embodiment, the ultrasonic transmitting solid-coupling unit 10 is provided with a first transmitting drum 24, a second transmitting drum 25, a third transmitting drum 26, and a fourth transmitting drum 27 arranged in sequence, and the arrangement direction of the first transmitting drum 24 toward the fourth transmitting drum 27 is the direction in which the object 12 is subjected to solid-coupling ultrasonic scanning. In the figure, the first transmitting drum 24 is adjacent to the second transmitting drum 25, and at this time, along the direction in which the object 12 passes through the solid-coupling ultrasonic scanning unit, the second transmitting drum 25 is the latter transmitting drum, and the first transmitting drum 24 is the former transmitting drum. In the figure, the center of a first single-array transmitting transducer 32 in the second transmitting drum 25 is located below the center of a first single-array transmitting transducer 32 in the first transmitting drum 24, and by analogy, the center of a second single-array transmitting transducer 32 in the second transmitting drum 25 is located below the center of a second single-array transmitting transducer 32 in the first transmitting drum 24, and other cases are sequentially deduced. In addition, the distribution position relationship between the single-array transmitting transducers 32 at the same sequential position in other two adjacent transmitting drums can be referred to the description herein.

[0130] Figure 2It is also shown in the figure that the ultrasonic receiving solid coupling unit 13 comprises a plurality of receiving rollers, wherein the first receiving roller 28, the second receiving roller 29, the third receiving roller 30 and the fourth receiving roller 31 are arranged in sequence in the ultrasonic receiving solid coupling unit 13, and the arrangement direction of the first receiving roller 28 to the fourth receiving roller 31 is the solid coupling ultrasonic scanning direction of the object to be detected 12; specifically, the first receiving roller 28 is opposite to the first transmitting roller 24, the second receiving roller 29 is opposite to the second transmitting roller 25, the third receiving roller 30 is opposite to the third transmitting roller 26, and the fourth receiving roller 31 is opposite to the fourth transmitting roller 27. It should be noted that, similar to the two adjacent transmitting rollers, for any two adjacent receiving rollers, along the direction of the object to be detected 12 passing through the solid coupling ultrasonic scanning unit, the center of the single-element receiving transducer 33 in the latter receiving roller is located below the center of the single-element receiving transducer 33 at the same sequence position in the former receiving roller,

[0131] Figure 2 In the figure, the first receiving roller 28 is adjacent to the second receiving roller 29, at this time, along the direction of the object to be detected 12 passing through the solid coupling ultrasonic scanning unit, the second receiving roller 29 is the latter receiving roller, and the first receiving roller 28 is the former receiving roller, in the figure, the center of the first single-element receiving transducer 33 in the second receiving roller 29 is located below the center of the first single-element receiving transducer 33 in the first receiving roller 28, and by analogy, it can be obtained that the center of the second single-element receiving transducer 33 in the second receiving roller 29 is located below the center of the second single-element receiving transducer 33 in the first receiving roller 28, and other cases are similar. In addition, the distribution position relationship between the other two adjacent receiving rollers and the single-element receiving transducers 33 at the same sequence position in the receiving roller can be referred to the description herein.

[0132] It should be noted that, for a transmitting roller and a receiving roller opposite thereto, the single-element transmitting transducer 32 and the single-element receiving transducer 33 at the same sequence position are opposite, for example, the first transmitting roller 24 and the first receiving roller 28 are opposite, then the center of the first single-element transmitting transducer 32 in the first transmitting roller 24 is opposite to the center of the first single-element receiving transducer 33 in the first receiving roller 28, in addition, it can also be obtained that the center of the second single-element transmitting transducer 32 in the first transmitting roller 24 is opposite to the center of the second single-element receiving transducer 33 in the first receiving roller 28, and other cases can be referred to the description herein, and will not be illustrated one by one.

[0133] The above shows that the solid coupling ultrasonic scanning unit includes four transmitting rollers and four receiving rollers in an embodiment, when the solid coupling ultrasonic scanning unit has other number of transmitting rollers and receiving rollers, the corresponding description can be referred to, and the specific implementation can meet the requirement of performing solid coupling ultrasonic scanning on the object 12, and the specific implementation is not illustrated here.

[0134] It should be noted that when the receiving transducer unit 14 in the receiving roller adopts the receiving transducer group, at a certain moment, the ultrasonic transmission signal received by all single-element receiving transducers 33 in the four receiving rollers can be acquired and the ultrasonic scanning signal group can be generated. When the receiving transducer unit 14 of the receiving roller adopts the receiving array transducer, the corresponding ultrasonic scanning signal group can be acquired based on the ultrasonic transmission signals received by all array receiving transducer elements.

[0135] In an embodiment of the present application, for any two adjacent transmitting rollers, the center distance of the two single-element transmitting transducers 32 in the same order position is z / n, and n is the number of transmitting rollers in the ultrasonic transmitting solid coupling unit 10.

[0136] When the number of transmissions in the ultrasonic reflection solid coupling unit 10 is n, then for any two adjacent transmitting rollers, the center distance of the two single-element transmitting transducers 32 in the same order position is z / n, as shown in the following formula: Figure 2 When the ultrasonic transmitting solid coupling unit 10 includes four transmitting rollers, the center distance of the two single-element transmitting transducers 32 in the same order position is z / 4. It should be noted that when the center distance of the two single-element transmitting transducers 32 in the same order position is z / n, the resolution of generating the corresponding ultrasonic image based on the above object ultrasonic detection information can be improved.

[0137] As can be seen from the above description, in the same transmitting roller, the center distance of the two adjacent single-element transmitting transducers 32 is z, therefore, in the specific implementation, the corresponding distance z can be determined according to the type of the selected single-element transmitting transducer 32, and the specific determination method of z can be consistent with the prior art.

[0138] In an embodiment of the present application, the ultrasonic control and detection processing unit 1 includes an excitation control module 2 for driving the ultrasonic transmitting unit, wherein,

[0139] The excitation control module 2 is adaptively connected with all transmitting transducer units 11 to drive the transmitting transducer units 11 to work;

[0140] When the transmitting transducer unit 11 adopts the transmitting array transducer 34, the excitation control module 2 controls the working state of the corresponding transmitting array transducer 34 by using the electronic focusing method, so as to configure the transmitting transducer unit to perform the ultrasonic focusing scanning on the measured object 12.

[0141] Figure 1 In the embodiment shown in the figure, the ultrasonic control detection processing unit 1 includes the excitation control module 2, and the excitation control module 2 includes N transmitting channels 8. The number N of the transmitting channels 8 corresponds to the number of the transmitting transducer units 11. For example, when the transmitting transducer unit 11 adopts the transmitting transducer group, the number of all the single-element transmitting transducers 32 should not be more than N, that is, one single-element transmitting transducer 32 is connected to the corresponding one transmitting channel 8 through the transmitting channel coaxial line 9. When the transmitting transducer unit 11 adopts the transmitting array transducer 34, the number of all the array transmitting transducer elements 35 should also not be more than N, and at this time, one array transmitting transducer element 35 is connected to the corresponding transmitting channel 8 through the transmitting channel coaxial line 9.

[0142] As can be seen from the above description, the number of the receiving channels 16 in the receiving processing module 3 is also at least N, and at this time, one receiving channel 16 is connected to the corresponding one single-element receiving transducer 33 or one array receiving transducer element through the receiving channel coaxial line 15. For details, reference can be made to the above description about the corresponding transmitting channel 8, which will not be described herein again.

[0143] It can be understood that the focusing area of the single-element transmitting transducer 32 is often fixed and is affected by the size of the array element of the single-element transmitting transducer 32, which limits the imaging resolution of the single-element transmitting transducer 32. The distance between the array transmitting transducer elements 35 in the transmitting array transducer 34 is much smaller than the size of the single-element transmitting transducer 32. At this time, when the transmitting transducer unit 11 adopts the transmitting array transducer 34, the excitation control module 2 controls the working state of the corresponding transmitting array transducer 34 by using the electronic focusing method, that is, the beam energy can be flexibly focused to the target position by using the electronic focusing method, and the ultrasonic scanning in the whole range of the transmitting array transducer 34 can be realized by activating the array transmitting transducer elements 35 at different positions in sequence, which greatly improves the imaging resolution compared with the transmitting transducer group using the single-element transmitting transducer 32.

[0144] It should be noted that when the ultrasonic focusing scanning is performed, the excitation control module 2 can configure part of the array transmitting transducer elements 35 to be in the ultrasonic transmitting state, but the receiving processing module 3 should configure all the array receiving transducer elements to be in the ultrasonic receiving state.

[0145] In addition, as can be seen from the above description, when the transmitting transducer unit 11 adopts the transmitting array transducer 34, only one transmitting roller and one receiving roller can be used, and the consistency requirements of the transmitting roller and the receiving roller can be reduced when performing solid coupling ultrasonic scanning on the object 12, and the solid coupling ultrasonic scanning time of the object 12 in a single time can not be increased.

[0146] In an embodiment of the present application, when the excitation control module 2 controls the working state of the transmitting array transducer 34 by using the electronic focusing method, at least the transmitting delay control, the transmitting aperture control and / or the amplitude apodization control of the transmitting array transducer 34 are performed to regulate the sound field energy of the ultrasonic waves emitted by the transmitting array transducer 34.

[0147] Figure 1 In an embodiment of the present application, the transmitting waveform control unit 4, the transmitting delay control unit 5, the transmitting aperture control unit 7 and the amplitude apodization control unit 6 are arranged in the excitation control module 2, wherein the waveform of the ultrasonic waves emitted by the array transmitting transducer elements 35 can be controlled by the transmitting waveform control unit 4, the delay of the ultrasonic waves emitted by the array transmitting transducer elements 35 can be regulated by the transmitting delay control unit 5, the aperture of the ultrasonic waves emitted by the array transmitting transducer elements 35 can be regulated by the transmitting aperture control unit 7, and the amplitude apodization of the ultrasonic waves emitted by the array transmitting transducer elements 35 can be controlled by the amplitude apodization control unit 6. The following will be explained in detail.

[0148] Specifically, the transmitting waveform control unit 4 can generate a waveform signal for exciting the transmitting array transducer 34, wherein the waveform can be a single pulse or a complex multi-period waveform, and the shape and frequency of the waveform will affect the imaging quality. By adjusting the waveform parameters, the penetration depth, resolution and contrast can be optimized. The transmitting waveform control unit 4 can adopt existing transmitting waveform control forms, and the specific form is subject to the requirement of generating the required waveform signal.

[0149] The transmitting delay control unit 5 is used to control the time delay of the ultrasonic waves emitted by each array transmitting transducer element 35 in the transmitting array transducer 34. By accurately adjusting the emission time of each array transmitting transducer element 35, beamforming control can be achieved, i.e. the direction and focal point of the ultrasonic beam are controlled, which enables the ultrasonic waves to be focused at a specific depth and improves the lateral and axial resolution of the image.

[0150] It should be noted that the transmitting aperture refers to the number of array transmitting transducer elements 35 participating in the emission of ultrasonic waves and the arrangement mode thereof. The transmitting aperture control unit 7 determines the required array transmitting transducer elements 35 to be activated and how they work together to produce the required beam. By changing the transmitting aperture, the size and shape of the ultrasonic beam can be adjusted to adapt to the imaging requirements of different depths and ranges.

[0151] Amplitude apodization refers to adjusting the spatial distribution of the transmitted signal intensity, and the amplitude apodization control unit 6 can control the amplitude of the transmitted signal of each transducer so as to optimize the ultrasonic beam energy distribution and prevent artifacts from occurring during imaging.

[0152] It should be noted that the transmission waveform control unit 4, the transmission delay control unit 5, the amplitude apodization control unit 6, and the transmission aperture control unit 7 can adopt the existing common form, and the specific implementation of the electronic focusing method for the transmission array transducer 34 can be consistent with the existing one, which will not be described here.

[0153] When the transmission transducer unit 11 adopts a transmission transducer group, it is generally not necessary to control by using the electronic focusing method, but the transmission waveform control unit 4 described above can control the waveform of the ultrasonic wave transmitted by the single-element transmission transducer 32. The specific control of the waveform of the ultrasonic wave can meet the requirements of the solid coupling ultrasonic scanning of the object 12 to be measured.

[0154] In an embodiment of the present application, after the solid coupling ultrasonic scanning of the object 12 to be measured is performed, the ultrasonic control detection processing unit 1 performs ultrasonic scanning signal reconstruction processing on the ultrasonic scanning signal group when generating the ultrasonic scanning image of the object 12 to be measured by using the obtained ultrasonic scanning signal group, wherein,

[0155] When performing the ultrasonic scanning signal reconstruction processing, the ultrasonic scanning signals corresponding to the time points of different receiving rollers are extracted for the target imaging point on the object 12 to be measured.

[0156] The extracted ultrasonic scanning signals are arranged based on the position information of the ultrasonic receiving unit to generate position-reconstructed ultrasonic scanning signals.

[0157] Based on the position-reconstructed ultrasonic scanning signals described above, the ultrasonic scanning image of the object 12 to be measured is generated.

[0158] It should be noted that when the solid coupling ultrasonic scanning of the object 12 to be measured is performed, the object 12 to be measured is clamped by the transmission roller and the receiving roller and sequentially passes through all the rollers under the action of friction as the transmission roller and the receiving roller rotate. During this period, the transmission transducer unit 11 in the transmission roller periodically transmits ultrasonic signals, and at the same time, the receiving transducer unit 13 in the receiving roller receives the ultrasonic scanning signals. When a certain abscissa x' position on the object 12 to be measured passes through the last receiving roller, the ultrasonic scanning signals collected by all the receiving transducer units 13 can be reconstructed to obtain a high-resolution image. Under the condition of using the same size single-element transmission transducer 32, compared with using a single pair of rollers (one transmission roller and one receiving roller), the resolution of the reconstructed image is improved from z to z / n.

[0159] Specifically, the emission period of the ultrasonic signal is generally related to multiple factors, such as the advancing speed of the object 12 under the rotation of the drum, and the required imaging resolution. For example, assuming that the advancing speed of the object 12 is 200 mm / s and the required resolution is 1 mm, 200 ultrasonic signals need to be emitted per second, and the corresponding period is 5 ms; of course, after the ultrasonic signals are periodically emitted, the ultrasonic signals can be synchronously received by the receiving transducer unit 13.

[0160] The process of the ultrasonic scanning signal reconstruction will be described in detail below. Figure 2 The process of the ultrasonic scanning signal reconstruction will be described in detail below.

[0161] In the process of the solid-coupled ultrasonic scanning, the ultrasonic scanning signals are simultaneously received by the receiving drums, assuming that the lateral distance between the centers of the receiving drums is x, the distance between the center of the receiving drum and the surface of the object 12 is y, the receiving drum rotates at an angular velocity of w (rad / s) at a constant speed, and the time when the lateral coordinate x' position on the object 12 passes through the first receiving drum 28 is t, then the times when the lateral coordinate x' position on the object 12 passes through the centers of the second receiving drum 29, the third receiving drum 30, and the fourth receiving drum 31 are t+x / (w·y), t+2x / (w·y), and t+3x / (w·y), respectively. Therefore, for the ultrasonic scanning image of the lateral coordinate x' position on the object 12, the ultrasonic scanning signals received by the first receiving drum 28 to the fourth receiving drum 31 at the time t, the time t+x / (w·y), the time t+2x / (w·y), and the time t+3x / (w·y) can be reconstructed, and a high-resolution ultrasonic scanning image can be obtained.

[0162] The reconstruction process can be as follows: the ultrasonic scanning signals obtained by all the single-element receiving transducers 33 in the first receiving drum 28 to the fourth receiving drum 31 at the same position of the object 12 are sequentially rearranged according to the position information of the single-element receiving transducers 33, for example, for the imaging point with the lateral coordinate x' on the object 12, the ultrasonic scanning signals at the corresponding times of different receiving drums are first taken out, and then the ultrasonic scanning signals are rearranged according to the single-element receiving transducers 33 (height information), as shown in the following table. Figure 5

[0163] As shown in the following table, the drum five corresponds to the first receiving drum 28 in the table, the drum six corresponds to the second receiving drum 29 in the table, the drum seven corresponds to the third receiving drum 30 in the table, and the drum eight corresponds to the fourth receiving drum 31 in the table. Figure 5 Figure 2 As shown in the following table, the drum five corresponds to the first receiving drum 28 in the table, the drum six corresponds to the second receiving drum 29 in the table, the drum seven corresponds to the third receiving drum 30 in the table, and the drum eight corresponds to the fourth receiving drum 31 in the table. Figure 2 Figure 2 As shown in the following table, the drum five corresponds to the first receiving drum 28 in the table, the drum six corresponds to the second receiving drum 29 in the table, the drum seven corresponds to the third receiving drum 30 in the table, and the drum eight corresponds to the fourth receiving drum 31 in the table. Figure 2 ​​​The fourth receiving roller 31 in the fourth receiving roller 31. In addition, the first single element receiving transducer 33 corresponds to the first single element receiving transducer 33 in the receiving roller, the second single element receiving transducer 33 corresponds to the second single element receiving transducer 33 in the receiving roller, the third single element receiving transducer 33 corresponds to the third single element receiving transducer 33 in the receiving roller, and the fourth single element receiving transducer 33 corresponds to the fourth single element receiving transducer 33 in the receiving roller. Figure 5 In the fourth receiving roller 31 in the fourth receiving roller 31. In addition, the first single element receiving transducer 33 corresponds to the first single element receiving transducer 33 in the receiving roller, the second single element receiving transducer 33 corresponds to the second single element receiving transducer 33 in the receiving roller, the third single element receiving transducer 33 corresponds to the third single element receiving transducer 33 in the receiving roller, and the fourth single element receiving transducer 33 corresponds to the fourth single element receiving transducer 33 in the receiving roller.

[0164] As can be seen from the above description, the ultrasonic scanning signals obtained by the single element receiving transducers 33 in different receiving rollers need to be reconstructed, so higher requirements are put forward for the consistency between the receiving rollers, otherwise the reconstructed image will not be uniform and stripes will appear. In addition, since the entire scanning process needs to pass through the first receiving roller 28 to the fourth receiving roller 31 in sequence, the time required for a solid coupling ultrasonic scan is also increased accordingly.

[0165] In addition, when performing data reconstruction, the ultrasonic scanning signals obtained by the single element receiving transducers 33 can be directly generated into corresponding ultrasonic scanning detection images through ultrasonic scanning signal reconstruction processing without going through the above-mentioned signal-to-noise ratio improvement processing and scanning signal analysis processing. Of course, the above-mentioned signal-to-noise ratio improvement processing and scanning signal analysis processing can also be used, and the scanning signal analysis processing specifically refers to reconstructing the ultrasonic scanning signals to generate object ultrasonic scanning signals and object ultrasonic detection signals, which are specifically used to form ultrasonic scanning detection images, and will not be described here.

[0166] It should be noted that when the transmitting transducer unit 11 adopts the transmitting array transducer 34, only one receiving roller and one corresponding transmitting roller can be used, so that the consistency requirement between the transmitting roller and the receiving roller can be reduced, and the single solid coupling ultrasonic scanning time for the measured object 12 can also be reduced, and the ultrasonic scanning signal reconstruction processing operation can also be omitted.

[0167] As can be seen from the above description, based on the type of the ultrasonic scanning signal, the ultrasonic scanning signal-to-noise ratio improvement signal is processed to generate object ultrasonic scanning information. Specifically, the type of the ultrasonic scanning signal can be an ultrasonic transmission signal or an ultrasonic reflection signal, wherein the ultrasonic transmission signal can be received by a receiving array transducer or a receiving transducer group.

[0168] When the ultrasonic transmission signal is formed by the corresponding reception of the receiving transducer group, all the ultrasonic scanning signal-to-noise ratio improvement signals are directly loaded into the peak-to-peak value calculation unit 36, so as to use the peak-to-peak value calculation unit 36 ​​to calculate the corresponding peak-to-peak value (PPV value) of each ultrasonic scanning signal-to-noise ratio improvement signal. Thereafter, after calculating the corresponding peak-to-peak value of each ultrasonic signal signal-to-noise ratio improvement signal, the above-mentioned data reconstruction can be performed based on the peak-to-peak value.

[0169] When the ultrasonic transmission signal is received by the receiving array transducer, all ultrasonic scanning signal-to-noise ratio-enhanced signals are in-phase superimposed to generate an ultrasonic scanning phase-superimposed signal. The ultrasonic scanning signal-to-noise ratio-enhanced signal is generated by performing signal-to-noise ratio enhancement processing on the ultrasonic scanning signal. The ultrasonic scanning phase-superimposed signal is then loaded into a peak-to-peak value calculation unit 36 ​​to calculate the peak-to-peak value of the ultrasonic scanning phase-superimposed signal.

[0170] When the ultrasonic scanning signal is an ultrasonic reflection signal, all ultrasonic scanning signal-to-noise ratio improvement signals are superimposed in phase to generate an ultrasonic scanning phase-superimposed signal after the in-phase superposition. Thereafter, the ultrasonic scanning phase-superimposed signal is subjected to band-limited filtering processing, demodulation filtering processing, and envelope detection processing in sequence to generate an ultrasonic reflection detection processed signal after processing.

[0171] As can be seen from the above description, the ultrasonic scanning signal-to-noise ratio improvement signal is a digital signal formed by sampling, and according to the waveform of the ultrasonic scanning signal-to-noise ratio improvement signal, in-phase superposition can be achieved.

[0172] It can be understood that when performing in-phase superposition, it specifically means that after generating corresponding ultrasonic scanning signal-to-noise ratio improvement signals for the ultrasonic scanning signals received by different ultrasonic receiving units at the same time, all ultrasonic scanning signal-to-noise ratio improvement signals are superimposed in the same phase, such as Figure 1 In the embodiment, when a solid-coupled ultrasonic scanning unit is used to perform solid-coupled ultrasonic scanning on an object to be measured 12 at a certain position, multiple ultrasonic transmission signals can be received simultaneously by multiple receiving transducer units 14. After performing signal-to-noise ratio enhancement processing on each ultrasonic transmission signal, a corresponding ultrasonic transmission signal-to-noise ratio enhanced signal can be obtained. All current ultrasonic transmission signal-to-noise ratio enhanced signals are superimposed in the same phase to generate a corresponding ultrasonic transmission phase-superimposed signal. At this time, beam synthesis of the ultrasonic scanning signal is achieved.

[0173] Figure 1An embodiment of the scan signal analysis processing unit is shown in FIG. 2, in which the scan signal processing unit can include a delay-and-sum unit 20, a band-limit filter 21, a demodulation filter 22, an envelope detection unit 23, and a peak-to-peak value calculation unit 36. Specifically, the delay-and-sum unit 20 performs in-phase summation on all the ultrasound scan signal enhancement signals, the band-limit filter 21 performs band-limit filtering, the demodulation filter 22 performs demodulation filtering, the envelope detection unit 23 performs envelope detection, and the peak-to-peak value calculation unit 36 performs peak-to-peak value calculation.

[0174] The delay-and-sum unit 20: Delay-and-sum (DAS) is a commonly used beamforming technique. In this stage, the ultrasound scan signal enhancement signals are applied with different delays to compensate for the different path lengths of the sound waves received. The purpose of this is to align the echo signals on all paths when they are summed, thereby enhancing the signal strength in the target direction. By summing the signals of multiple channels, the signal-to-noise ratio can be improved, and a beam with strong directivity can be formed.

[0175] The band-limit filter 21 is used to limit the frequency bandwidth of the signal, removing unwanted noise and interference signals. It can be a low-pass filter, a high-pass filter, or a band-pass filter, depending on the frequency range of the signal that needs to be preserved. Band-limit filtering helps to improve image clarity and resolution in subsequent processing steps.

[0176] The demodulation filter 22 is mainly used to convert high-frequency ultrasound signals into low-frequency signals that are easy to process. This process usually involves multiplying the received signal with a reference signal (demodulation) to recover the baseband signal that carries the image information. The demodulation filter 22 can further filter out unnecessary frequency components and highlight the information of interest.

[0177] The envelope detection unit 23 is generally used for envelope detection of the ultrasound reflection signal. Envelope detection is a commonly used signal processing method in ultrasound imaging, used to extract the amplitude information of the ultrasound reflection signal.

[0178] The peak-to-peak value calculation unit 36 is generally responsible for calculating the maximum or peak value of the ultrasound transmission signal. By calculating the maximum or peak value of the ultrasound transmission signal, it can help to determine the boundaries of different structures in the image generated based on the ultrasound transmission signal.

[0179] It should be noted that the signal after ultrasonic transmission analysis and processing can be used to generate the ultrasonic scanning information of the object, generally, the signal after ultrasonic transmission analysis and processing can be directly used to generate the ultrasonic scanning information of the object, or the signal after ultrasonic transmission analysis and processing is processed as needed to generate the ultrasonic scanning information of the object, wherein the necessary processing can be filtering and the like, and the necessary processing can be selected according to actual needs, and the ultrasonic scanning information of the object can be generated as required.

[0180] As can be seen from the above description, the signal after ultrasonic transmission analysis and processing represents the state of the solid-coupled ultrasonic scanning of the object 12 at a certain time, and therefore the generated ultrasonic scanning information of the object represents the scanning state at a certain time / position during the solid-coupled ultrasonic scanning of the object 12. Thus, after the solid-coupled ultrasonic scanning of the object 12 is completed, the ultrasonic detection information of the object 12 can be generated based on all the ultrasonic scanning information of the object.

[0181] It can be understood that when the ultrasonic scanning signal group simultaneously includes the ultrasonic transmission signal and the ultrasonic reflection signal, the ultrasonic transmission signal and the ultrasonic reflection signal should be analyzed and processed as described above, that is, the corresponding ultrasonic transmission signal after analysis and processing and the ultrasonic reflection signal after analysis and processing can be obtained, and at this time, the corresponding ultrasonic scanning information of the object can be generated based on the ultrasonic transmission signal after analysis and processing and the ultrasonic reflection signal after analysis and processing.

[0182] As can be seen from the above description, the ultrasonic detection method with high precision of the present application can be obtained, specifically, for any object 12 suitable for solid-coupled ultrasonic scanning, the ultrasonic detection device is used to perform solid-coupled ultrasonic scanning detection on the object 12 to generate the ultrasonic scanning information of the object 12 during the solid-coupled ultrasonic scanning detection.

[0183] Specifically, the method and process of using the ultrasonic detection device to perform solid-coupled ultrasonic scanning detection on the object 12 can refer to the above description, wherein the ultrasonic scanning signal group is obtained during the solid-coupled ultrasonic scanning detection, and the corresponding ultrasonic scanning information of the object is generated based on the ultrasonic scanning signal group, and the specific method and process of generating the ultrasonic scanning information of the object can refer to the above description, which will not be described here.

Claims

1. A high-precision ultrasonic detection device, characterized in that: The ultrasonic detection device comprises: A solid-coupled ultrasonic scanning unit, used for performing solid-coupled ultrasonic scanning on the object to be tested; an ultrasonic control detection processing unit, adapted to be connected to the solid-coupled ultrasonic scanning unit, and configured to control the solid-coupled ultrasonic scanning unit to perform solid-coupled ultrasonic scanning on the object to be tested, so as to obtain a corresponding ultrasonic scanning signal group when the object to be tested is subjected to the solid-coupled ultrasonic scanning, wherein the ultrasonic scanning signal group includes a plurality of ultrasonic scanning signals; The ultrasonic control detection processing unit performs scanning signal detection processing on the acquired ultrasonic scanning signal group to generate ultrasonic scanning information of the object to be measured after performing the scanning signal detection processing, wherein: Scanning signal detection processing includes at least signal-to-noise ratio improvement processing and scanning signal analysis processing, wherein: When performing scanning signal detection processing, each ultrasonic scanning signal is subjected to signal-to-noise ratio enhancement processing, and scanning signal analysis processing is performed on all ultrasonic scanning signals subjected to the signal-to-noise ratio enhancement processing, so as to generate ultrasonic scanning information of the object to be measured after the scanning signal analysis processing; The ultrasonic control detection processing unit includes a scanning signal receiving processing module, The scanning signal receiving and processing module includes a signal-to-noise ratio improvement processing unit for performing signal-to-noise ratio improvement processing and a scanning signal analysis processing unit for performing scanning signal analysis processing, wherein: The signal-to-noise ratio enhancement processing unit is adaptively connected to the scanning signal analysis processing unit; The signal-to-noise ratio improvement processing unit includes a plurality of signal-to-noise ratio improvement processing subunits, wherein the ultrasonic scanning signals in the ultrasonic scanning signal group correspond one to one with the signal-to-noise ratio improvement processing subunits in the signal-to-noise ratio improvement processing unit; For any signal-to-noise ratio improvement processing subunit, performing signal-to-noise ratio improvement processing on the ultrasonic scanning signal input to the signal-to-noise ratio improvement processing subunit; The signal-to-noise ratio improvement processing subunit performs signal-to-noise ratio improvement processing on the ultrasonic scanning signal, including a first signal-to-noise ratio improvement processing and a second signal-to-noise ratio improvement processing, wherein: Before performing signal-to-noise ratio enhancement processing, the input ultrasonic scanning signal is converted into a corresponding ultrasonic scanning analog signal; When performing the first signal-to-noise ratio improvement process, it at least includes analog signal low-noise amplification processing, analog signal gain adjustment processing and / or analog signal filtering processing; When performing the second signal-to-noise ratio improvement process, the ultrasonic scanning analog signal that has undergone the first signal-to-noise ratio improvement process is first converted into a corresponding ultrasonic scanning digital signal, and then the converted ultrasonic scanning digital signal is subjected to at least a signal amplitude consistency correction process, so that the signal amplitudes of all ultrasonic scanning digital signals are consistent after the signal amplitude consistency correction process; The solid-coupled ultrasonic scanning unit includes an ultrasonic transmitting solid-coupled unit and an ultrasonic receiving solid-coupled unit, wherein: The ultrasonic emission solid coupling unit includes a plurality of emission rollers and an ultrasonic emission unit arranged in each emission roller, and the plurality of emission rollers are arranged in sequence along the solid coupling ultrasonic scanning direction of the object to be measured; The ultrasonic receiving solid coupling unit includes a plurality of receiving rollers and an ultrasonic receiving unit arranged in each receiving roller; The multiple transmitting rollers in the ultrasonic transmitting solid coupling unit correspond to the multiple receiving rollers in the ultrasonic receiving solid coupling unit in a one-to-one manner; When performing solid-coupled ultrasonic scanning on an object to be tested, the object to be tested is transported through the solid-coupled ultrasonic scanning unit, and in the process of passing through the solid-coupled ultrasonic scanning unit, the object to be tested is in rolling contact with the transmitting roller and the receiving roller; When the object to be tested is transported through the solid-coupled ultrasonic scanning unit, the ultrasonic control detection processing unit drives the ultrasonic transmitting unit to transmit ultrasonic signals to the object to be tested, and the ultrasonic receiving unit receives the signals to generate an ultrasonic scanning signal group; After performing solid-coupled ultrasonic scanning on the object to be tested, when generating an ultrasonic scanning image of the object to be tested using the acquired ultrasonic scanning signal group, the ultrasonic control detection processing unit performs ultrasonic scanning signal reconstruction processing on the ultrasonic scanning signal group, wherein: When performing ultrasonic scanning signal reconstruction processing, the ultrasonic scanning signals of different receiving rollers at corresponding moments are extracted from the target imaging point on the object to be measured; Arranging the extracted ultrasonic scanning signals based on corresponding position information of the ultrasonic receiving units to generate position-reconstructed ultrasonic scanning signals; Reconstructing the ultrasonic scanning signal based on the above position to generate an ultrasonic scanning image of the object to be measured; The ultrasonic transmitting unit is a transmitting transducer unit, and the transmitting transducer unit is a transmitting transducer group. The transmitting transducer group includes a plurality of single-element transmitting transducers. The single-element transmitting transducers in the transmitting transducer group are arranged in sequence along the axis direction of the transmitting roller in which they are located, and the number of single-element transmitting transducers in each transmitting roller is consistent. For any transmitting transducer group in the transmitting drum, the distance between the centers of two adjacent single-element transmitting transducers is z; For any two adjacent transmitting rollers, along the direction in which the object to be measured passes through the solid-coupled ultrasonic scanning unit, the center of the single-element transmitting transducer in the latter transmitting roller is located below the center of the single-element transmitting transducer at the same sequential position in the former transmitting roller. The center distance between the two single-element transmitting transducers at the same sequential position is z / n, where n is the number of transmitting rollers in the ultrasonic transmitting solid-coupled unit. The ultrasonic receiving unit adopts a receiving transducer unit. The type of the receiving transducer unit should be consistent with the type of the transmitting transducer unit. For any transmitting roller and a receiving roller corresponding to it, the single-element transmitting transducer in the transmitting roller corresponds to the single-element receiving transducer in the same sequence position in the receiving roller.

2. The high-precision ultrasonic detection device according to claim 1, characterized in that: When the scanning signal analysis processing unit is used to perform the scanning signal analysis processing, the method includes: Acquire ultrasound scanning signal-to-noise ratio improvement signal; Based on the type of the ultrasonic scanning signal, the ultrasonic scanning signal-to-noise ratio improvement signal is processed to generate ultrasonic scanning information of the object to be measured, wherein the ultrasonic scanning information of the object to be measured includes a peak-to-peak value of the scanning signal, a scanning signal envelope, a flight time and / or a spectrum feature.

3. The high-precision ultrasonic detection device according to claim 1, characterized in that: The ultrasonic control detection processing unit includes an excitation control module for driving an ultrasonic emitting unit, wherein: The excitation control module is adaptively connected to all the transmitting transducer units to drive the transmitting transducer units to work.

4. A high-precision ultrasonic detection method, characterized in that: For any object to be tested that is suitable for solid-coupled ultrasonic scanning, the ultrasonic detection device described in any one of claims 1 to 3 is used to perform solid-coupled ultrasonic scanning detection on the object to be tested, so as to generate ultrasonic scanning information of the object to be tested during the solid-coupled ultrasonic scanning detection process.

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