High-precision ultrasonic detection device and detection method

Abstract

The invention relates to a high-precision ultrasonic detection device and a high-precision ultrasonic detection method. The device comprises a solid coupling ultrasonic scanning unit and an ultrasonic control detection processing unit, scanning signal detection processing is carried out on an obtained ultrasonic scanning signal group through the ultrasonic control detection processing unit, and object ultrasonic scanning information is generated after the scanning signal detection processing is carried out, the method at least comprises signal-to-noise ratio improvement processing and scanning signal analysis processing, when scanning signal detection processing is executed, signal-to-noise ratio improvement processing is carried out on each ultrasonic scanning signal, scanning signal analysis processing is executed on all the ultrasonic scanning signals subjected to signal-to-noise ratio improvement processing, and scanning signal analysis processing is executed on all the ultrasonic scanning signals subjected to signal-to-noise ratio improvement processing. After the scanning signal is analyzed and processed, object ultrasonic scanning information is generated. When the object to be detected is subjected to solid coupling ultrasonic detection, the signal-to-noise ratio of the received ultrasonic scanning signal can be improved, and the precision and reliability of ultrasonic detection are improved.

Description

Technical Field

[0001] The invention relates to an ultrasonic detection device and a detection method, in particular to a high-precision ultrasonic detection device and a detection method. Background Art

[0002] Ultrasonic waves are widely used in the field of industrial non-destructive testing due to their non-corrosiveness, high sensitivity, and strong penetration. As the popularity of new energy continues to rise, the quality of batteries has received more and more attention, and ultrasonic non-destructive testing has also been applied to the field of new energy batteries.

[0003] Since ultrasonic testing of batteries cannot use water as a sound-conducting medium, there are currently several main solutions for ultrasonic testing of batteries: 1) using insulating silicone oil, 2) using air coupling, and 3) using solid coupling. Among them, the ultrasonic testing solution using insulating silicone oil is currently mainly used in laboratory research and other scenarios that are not sensitive to silicone oil contamination; for the ultrasonic testing solution using air coupling, since ultrasonic waves are severely attenuated in the air, further research is needed to obtain ideal sensitivity and signal-to-noise ratio; for the ultrasonic testing solution using solid coupling, solid materials with good sound conductivity and low attenuation are required.

[0004] When performing ultrasonic testing on batteries produced on a battery production line, the first thing to do is to avoid battery contamination. Therefore, liquid coupling media such as silicone oil cannot be used. The detection speed must also be increased to meet the production capacity requirements of the production line. Therefore, it is necessary to develop a simple and fast solid coupling scanning solution for use in ultrasonic testing scenarios on battery production lines.

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

[0006] Based on the disclosed content of CN109283259A, it can be known that the ultrasonic scanning device for realizing ultrasonic detection has a simple structure and is easy to use, but solid coupling cannot strictly guarantee the isotropic consistency like liquid coupling. In addition, solid coupling attenuates ultrasonic signals more than liquid coupling, and the signal-to-noise ratio of the acquired ultrasonic scanning signal will be affected, thereby affecting the imaging quality. Summary of the invention

[0007] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a high-precision ultrasonic detection device and detection method, which can improve the signal-to-noise ratio of the received ultrasonic scanning signal when solid-coupled ultrasonic detection is used for the object to be detected, and improve the accuracy and reliability of ultrasonic detection.

[0008] According to the technical solution provided by the present invention, a high-precision ultrasonic detection device comprises:

[0009] A solid-coupled ultrasonic scanning unit, used for performing solid-coupled ultrasonic scanning on the object to be tested;

[0010] an ultrasonic control detection processing unit, adapted to be connected with the solid-coupled ultrasonic scanning unit, and used 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 solid-coupled ultrasonic scanning, wherein the ultrasonic scanning signal group includes a plurality of ultrasonic scanning signals;

[0011] The ultrasonic scanning signal group is acquired, and scanning signal detection processing is performed by the ultrasonic control detection processing unit to generate object ultrasonic scanning information after performing the scanning signal detection processing, wherein:

[0012] The scanning signal detection process at least includes signal-to-noise ratio improvement process and scanning signal analysis process, wherein:

[0013] 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, so as to generate object ultrasonic scanning information after the scanning signal analysis processing.

[0014] The ultrasonic control detection processing unit includes a scanning signal receiving processing module,

[0015] 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:

[0016] The signal-to-noise ratio enhancement processing unit is adaptively connected to the scanning signal analysis processing unit;

[0017] 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;

[0018] 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.

[0019] 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 / or a second signal-to-noise ratio improvement processing, wherein:

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

[0021] When the first signal-to-noise ratio improvement process is performed, it at least includes analog signal low-noise amplification processing, analog signal gain adjustment processing and / or analog signal filtering processing;

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

[0023] The ultrasonic scanning digital signals generated by the conversion are at least subjected to 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.

[0024] When the scanning signal analysis processing unit is used to perform the scanning signal analysis processing, it includes:

[0025] Acquire ultrasound scanning signal-to-noise ratio improvement signal;

[0026] 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, wherein the object ultrasonic scanning information includes scanning signal peak-to-peak value, scanning signal envelope, flight time and / or spectrum characteristics.

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

[0028] The ultrasonic transmitting solid coupling unit comprises at least one transmitting roller and an ultrasonic transmitting unit arranged in each transmitting roller;

[0029] The ultrasonic receiving solid coupling unit comprises at least one receiving roller and an ultrasonic receiving unit arranged in each receiving roller;

[0030] The transmitting roller in the ultrasonic transmitting solid coupling unit corresponds to the receiving roller in the ultrasonic receiving solid coupling unit;

[0031] When the object to be tested is subjected to solid-coupled ultrasonic scanning, the object to be tested is transported to pass 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;

[0032] During the process of conveying the object to be tested 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 generates an ultrasonic scanning signal group through the ultrasonic receiving unit.

[0033] The ultrasonic transmitting unit comprises a transmitting transducer unit, and the transmitting transducer unit comprises 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 where they are located.

[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 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 transmitting 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 uses the electronic focusing method to control the working state of the transmitting array transducer, at least the transmitting array transducer is subjected to transmission delay control, transmission aperture control and / or amplitude apodization control to regulate the sound field energy of the ultrasonic wave emitted by the transmitting array transducer.

[0045] 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:

[0046] When performing ultrasonic scanning signal reconstruction processing, the ultrasonic scanning signals at the corresponding moments of different receiving rollers are extracted for the target imaging points on the object to be measured;

[0047] Arranging the extracted ultrasonic scanning signals based on the corresponding position information of the ultrasonic receiving units to generate position reconstruction ultrasonic scanning signals;

[0048] The ultrasonic scanning signal is reconstructed based on the above positions to generate an ultrasonic scanning image of the object to be measured.

[0049] A high-precision ultrasonic detection method, for any object to be detected that is 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 detected, so as to generate object ultrasonic scanning information of the object to be detected during the solid-coupled ultrasonic scanning detection process.

[0050] The advantages of the present invention are as follows: when a solid-coupled ultrasonic scanning unit is used to perform solid-coupled ultrasonic scanning on an object to be tested, an ultrasonic scanning signal group is obtained, and when the ultrasonic signal group is used to generate ultrasonic scanning information of the object, a signal-to-noise ratio enhancement process and a scanning signal analysis process are performed on the ultrasonic scanning signal, thereby improving the signal-to-noise ratio of the ultrasonic scanning signal, thereby improving the accuracy of the generated object scanning information. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 It is a schematic diagram of an embodiment of the ultrasonic detection device of the present invention.

[0052] Figure 2 It is a schematic diagram of an embodiment of the solid-coupled ultrasonic scanning unit of the present invention performing solid-coupled ultrasonic scanning on an object to be tested.

[0053] Figure 3 The figure is a schematic diagram of an embodiment of the present invention in which the transmitting transducer unit adopts a transmitting transducer group.

[0054] Figure 4A schematic diagram of an embodiment of the present invention in which the transmitting transducer unit adopts an array transducer.

[0055] Figure 5 A schematic diagram of an embodiment of data reconstruction of the present invention.

[0056] Description of the accompanying 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 tested, 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 wave filter, 19-consistency correction unit, 20-delay superposition unit, 21-band-limited filtering unit, 22-demodulation filtering unit, 23-envelope detection unit, 24-first transmitting roller, 25-second transmitting roller, 26-third transmitting roller, 27-fourth transmitting roller, 28-first receiving roller, 29-second receiving roller, 30-third receiving roller, 31-fourth receiving roller, 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 invention will be further described below in conjunction with specific drawings and embodiments.

[0058] When solid-coupled ultrasonic detection is used for the object to be detected 12, in order to improve the signal-to-noise ratio of the received ultrasonic scanning signal and improve the accuracy and reliability of ultrasonic detection, the present invention provides a high-precision ultrasonic detection device. Specifically, the ultrasonic detection device includes:

[0059] A solid-coupled ultrasonic scanning unit, used for performing solid-coupled ultrasonic scanning on the object 12 to be tested;

[0060] The ultrasonic control detection processing unit 1 is adaptively connected to the solid-coupled ultrasonic scanning unit, and is used to control the solid-coupled ultrasonic scanning unit to perform solid-coupled ultrasonic scanning on the object to be tested 12, so as to obtain a corresponding ultrasonic scanning signal group when the object to be tested 12 is subjected to solid-coupled ultrasonic scanning, wherein the ultrasonic scanning signal group includes a plurality of ultrasonic scanning signals;

[0061] The ultrasonic scanning signal group is subjected to scanning signal detection processing by the ultrasonic control detection processing unit 1, so as to generate object ultrasonic scanning information after performing the scanning signal detection processing, wherein:

[0062] The scanning signal detection process at least includes signal-to-noise ratio improvement process and scanning signal analysis process, 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, so as 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 an existing commonly used product or sample, such as the object 12 to be tested can be a lithium-ion battery involved in the publication number CN109283259A. The type of the object 12 to be tested can be selected according to actual needs, and no examples are given here. When performing solid-coupled ultrasonic testing on the object 12 to be tested, a solid-coupled ultrasonic scanning unit adapted to 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, and 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 in the process of performing solid-coupled ultrasonic scanning on 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 tested 12, the solid-coupled ultrasonic scanning unit should be adaptively connected to the ultrasonic control detection processing unit 1, and the ultrasonic control detection processing unit 1 can control the solid-coupled ultrasonic scanning process of the object to be tested 12. It can be seen from the above description that when the solid-coupled ultrasonic scanning process of the object to be tested 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 tested 12, and the ultrasonic reflection signal is generally an ultrasonic signal that is reflected by the object to be tested 12. The type of ultrasonic scanning signal is related to the solid-coupled ultrasonic scanning method of the object to be tested 12, and can be selected and determined by the ultrasonic control detection processing unit 1.

[0067] After the ultrasonic scanning signal group is obtained, 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 to be tested at a certain time / position can be determined according to the object ultrasonic scanning information. It can be understood that after the solid-coupled ultrasonic scanning of the object 12 to be tested 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 to be tested can be determined according to the object ultrasonic detection information, wherein the detection state of the object 12 to be tested can be whether the object 12 to be tested has defects or the like, and the detection state of the object 12 to be tested can be related to the type of the object 12 to be tested and the purpose of performing solid-coupled ultrasonic scanning on the object 12 to be tested. The method and process of determining the detection state of the object 12 to be tested according to the object ultrasonic detection information can be consistent with the existing ones, and no further examples are given here.

[0068] The scanning signal detection processing performed by the ultrasonic control detection processing unit 1, in one embodiment of the present invention, at least includes signal-to-noise ratio improvement processing and scanning signal analysis processing. Specifically, when performing scanning signal detection processing, each ultrasonic scanning signal should generally be subjected to signal-to-noise ratio improvement processing first. It can be understood that the signal-to-noise ratio of each ultrasonic scanning signal can be improved by performing signal-to-noise ratio improvement processing on each ultrasonic scanning signal. Thereafter, scanning signal analysis processing is performed on all ultrasonic scanning signals that have undergone signal-to-noise ratio improvement processing to generate object ultrasonic scanning information after scanning signal analysis processing. It can be seen from this that since all ultrasonic scanning signals have undergone signal-to-noise ratio improvement processing, scanning signal analysis processing is then performed, which can improve the accuracy of the generated object ultrasonic scanning information, and further improve the accuracy of the generated object ultrasonic detection information, and thus improve the accuracy and reliability of ultrasonic detection of the object 12 to be detected.

[0069] The following is a detailed explanation of the method and process of the scanning signal detection processing performed by the ultrasonic control detection processing unit 1.

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

[0071] The scanning signal receiving and 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 enhancement processing unit is adaptively connected to the scanning signal analysis processing unit;

[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 improvement processing unit and a scanning signal analysis processing unit, wherein the signal-to-noise ratio improvement processing unit can be used to perform signal-to-noise ratio improvement processing on each ultrasonic scanning signal; for all ultrasonic scanning signals after the signal-to-noise ratio improvement processing, the scanning signal analysis processing unit can be used to perform scanning signal analysis processing, and the signal-to-noise ratio improvement 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 a plurality of signal-to-noise ratio improvement processing sub-units, and 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. Thus, 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 to generate a corresponding ultrasonic scanning analog signal;

[0079] When the first signal-to-noise ratio improvement process is performed, 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, firstly, the ultrasonic scanning analog signal or the ultrasonic scanning analog signal after the first signal-to-noise ratio improvement process is converted into a corresponding ultrasonic scanning digital signal.

[0081] The ultrasonic scanning digital signals generated by the conversion are at least subjected to 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.

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

[0083] It should be noted that since the ultrasonic scanning signal is a mechanical wave, before the signal-to-noise ratio is improved, the ultrasonic scanning signal needs to be converted into an ultrasonic scanning analog signal. The method of converting the ultrasonic scanning signal into the ultrasonic scanning analog signal can be consistent with the existing method, such as converting the ultrasonic scanning signal into the corresponding ultrasonic scanning analog signal by piezoelectric conversion or the like. After the ultrasonic scanning analog signal is converted to obtain the ultrasonic scanning analog signal, the first signal-to-noise ratio improvement processing or the second signal-to-noise ratio improvement processing should be performed on the ultrasonic scanning analog signal.

[0084] Specifically, the first processing for improving the signal-to-noise ratio performed on the ultrasonic scanning analog signal may at least include analog signal low-noise amplification processing, analog signal gain adjustment processing and / or analog signal filtering processing, wherein the analog signal low-noise amplification processing specifically refers to the amplification of the ultrasonic scanning analog signal; the analog signal gain adjustment processing specifically refers to the gain adjustment of the ultrasonic scanning analog signal; the analog signal filtering processing specifically refers to the filtering processing of the ultrasonic scanning analog signal; of course, the first processing for improving the signal-to-noise ratio performed may include analog signal low-noise amplification processing, analog signal gain adjustment processing and analog signal filtering processing at the same time, and may also choose to perform one or more of the analog signal low-noise amplification processing, analog signal gain adjustment processing and analog signal filtering processing according to actual scenario requirements.

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

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

[0087] When performing the second processing of improving the signal-to-noise ratio, the ultrasonic scanning analog signal or the ultrasonic scanning signal-to-noise ratio improved signal after the first processing can be converted into a digital form, so that the ultrasonic scanning digital signal can be obtained after the analog-to-digital conversion. For the obtained ultrasonic scanning digital signal, at least a signal amplitude consistency correction process is performed; specifically, when performing the signal amplitude consistency correction process, the signal amplitudes of all ultrasonic scanning digital signals should be consistent. Specifically, when performing the analog-to-digital conversion, the ultrasonic scanning analog signal or the ultrasonic scanning signal-to-noise ratio improved signal after the first processing can be sampled, and the corresponding ultrasonic scanning digital signal can be generated. It can be seen that the ultrasonic scanning digital signal, specifically the discrete signal corresponding to the ultrasonic scanning analog signal or the ultrasonic scanning signal-to-noise ratio improved signal after the first processing, still has the characteristics of the corresponding analog signal. Thereafter, all ultrasonic scanning digital signals can be subjected to a signal amplitude consistency correction process.

[0088] In specific implementation, a signal amplitude target value may be set according to the type of the object to be tested 12, so that when the signal amplitude consistency correction process is performed, the signal amplitudes of all ultrasonic scanning digital signals are corrected to the signal amplitude target value. The signal amplitude target value may also be dynamically adjusted according to the state of all ultrasonic scanning digital signals, such as the average value or median value of the signal amplitude of all ultrasonic scanning digital signals may be configured as the signal amplitude target value. The setting method of the signal amplitude target value may be selected according to actual needs, so as to obtain the desired object ultrasonic scanning signal.

[0089] Figure 1 FIG. 1 is an embodiment of the ultrasonic detection device of the present invention. As can be seen from the figure, when the object 12 to be tested is subjected to solid-coupled ultrasonic scanning, the ultrasonic scanning signal group obtained should be an ultrasonic transmission signal group. At this time, the ultrasonic scanning signal should be an ultrasonic transmission signal. In addition, Figure 1An embodiment of a signal-to-noise ratio improvement processing subunit is also shown in the figure. In the figure, the signal-to-noise ratio improvement processing subunit includes a receiving channel 16, an analog front-end unit 17, a digital filter 18 and a consistency correction unit 19 connected in sequence, wherein:

[0090] The ultrasonic transmission signal is converted into an ultrasonic transmission analog signal, and the ultrasonic transmission analog signal is loaded into the receiving channel 16, and the ultrasonic transmission analog signal is subjected to analog signal low-noise amplification processing, analog signal gain adjustment processing and / or analog signal filtering processing. That is, the first processing for improving the signal-to-noise ratio of the ultrasonic scanning analog signal can be implemented through the receiving channel 16, and thus, the first processed signal for improving the ultrasonic transmission signal-to-noise ratio can be obtained through the receiving channel 16.

[0091] In specific implementation, when using the receiving channel 16 to implement low-noise amplification of analog signals, it should be ensured that the influence of noise is minimized as much as possible while amplifying the analog signal. Generally, low-noise amplification of analog signals can be achieved by setting a low-noise amplifier (LNA) in the receiving channel 16. At this time, the low-noise amplifier should have a very low noise coefficient, 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. It can be seen that the corresponding low-noise amplifier can be selected according to the description here.

[0092] When the analog signal gain adjustment process is implemented using the receiving channel 16, 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 set 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 both deep and shallow structures have good visibility. It should be noted that the time gain compensation circuit can adopt the existing commonly used form, so as to achieve the analog signal gain adjustment.

[0093] When implementing analog signal filtering processing using the receiving channel 16, unnecessary frequency components should be filtered out and useful signals should be retained. Specifically, an analog signal filter can be set in the receiving channel 16, and analog signal filtering processing can be implemented through the analog signal filter. The analog signal filter should be able to effectively remove noise and other interfering signals while keeping the main characteristics of the signal unchanged. Common filter types can be used for analog signal filtering processing, such as low-pass filters, high-pass filters or band-pass filters. The type of analog signal filter is based on whether it can meet the requirements of implementing analog signal filtering processing.

[0094] The signal after the first processing of improving the ultrasonic transmission signal-to-noise ratio is loaded into 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 improving the ultrasonic transmission signal-to-noise ratio, so as to generate an ultrasonic transmission digital signal after the analog-to-digital conversion. The ultrasonic transmission digital signal can be digitally filtered by the digital filter 18, and after digital filtering, the signal amplitude is corrected by the consistency correction unit 19, so that the ultrasonic transmission digital signal with consistent signal amplitude can be obtained. It can be seen that the second processing of improving the signal-to-noise ratio can be performed by the analog front-end unit 17, the digital filter 18 and the consistency correction unit 19.

[0095] It can be seen from the above description that for each ultrasonic scanning signal, after the above-mentioned first signal-to-noise ratio improvement process and the second signal-to-noise ratio improvement process, an ultrasonic scanning signal-to-noise ratio improved signal can be generated, and the amplitudes of multiple ultrasonic scanning signal-to-noise ratio improved signals are consistent.

[0096] From the above description, we can see that Figure 1 An embodiment in which the signal-to-noise ratio improvement processing subunit can simultaneously perform the first signal-to-noise ratio improvement processing and the second signal-to-noise ratio improvement processing is shown. It should be noted that the receiving channel 16, the analog front-end unit 17, the digital filter 18 and the consistency correction unit 19 can adopt existing commonly used circuits or modules, specifically based on whether they can meet the requirements of performing the first signal-to-noise ratio improvement processing and the second signal-to-noise ratio improvement processing mentioned above.

[0097] It should be noted that Figure 1 The above description only shows an embodiment in which the ultrasonic scanning signal is an ultrasonic transmission signal. When the ultrasonic scanning signal is an ultrasonic reflection signal, reference may be made to Figure 1 As for the above description, that is, the method and process of performing signal-to-noise ratio enhancement processing on the ultrasonic reflection signal, please refer to the above corresponding description, which will not be repeated here.

[0098] In one embodiment of the present invention, when a scanning signal analysis processing unit is used to perform scanning signal analysis processing, the method includes:

[0099] Acquire ultrasound scanning signal-to-noise ratio improvement signal;

[0100] 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, wherein the object ultrasonic scanning information includes scanning signal peak-to-peak value, scanning signal envelope, flight time and / or spectrum characteristics.

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

[0102] It should be noted that when the ultrasonic scanning information of the object is the flight time or spectrum characteristics, the existing commonly used technical means can be used to determine the corresponding flight time or spectrum characteristics. The specific method of obtaining the flight time or spectrum characteristics can be consistent with the existing technology, and the required flight time and spectrum characteristics can be obtained. No examples will be given here.

[0103] In one embodiment of the present invention, 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 coupling unit 10 includes at least one transmitting roller and an ultrasonic transmitting unit arranged in each transmitting roller;

[0105] The ultrasonic receiving solid coupling 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 coupling unit 10 corresponds to the receiving roller in the ultrasonic receiving solid coupling unit 13;

[0107] When the object 12 to be tested is subjected to solid-coupled ultrasonic scanning, the object 12 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 12 to be tested is in rolling contact with the transmitting roller and the receiving roller;

[0108] During the process of conveying the object 12 to be tested 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 tested, and generates an ultrasonic scanning signal group through the ultrasonic receiving unit.

[0109] Figure 1An embodiment of a solid-coupled ultrasonic scanning unit is shown in the figure. In the figure, the solid-coupled ultrasonic scanning unit includes an ultrasonic transmitting solid coupling unit 10 and an ultrasonic receiving solid coupling unit 13, wherein the ultrasonic transmitting solid coupling unit 10 and the ultrasonic receiving solid coupling unit 13 are correspondingly arranged to satisfy the requirement of performing solid-coupled ultrasonic scanning on the object to be measured 12. In the figure, when performing solid-coupled ultrasonic scanning on the object to be measured 12, the object to be measured 12 should be located between the ultrasonic transmitting solid coupling unit 10 and the ultrasonic receiving solid coupling unit 13.

[0110] Specifically, the ultrasonic transmitting solid coupling unit 10 includes at least one transmitting roller and an ultrasonic transmitting unit arranged in each transmitting roller, and the ultrasonic receiving solid coupling 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 a one-to-one positive correspondence. The transmitting rollers and the receiving rollers can specifically adopt the form disclosed in publication number CN109283259A. In addition, the method of performing solid-coupled ultrasonic scanning on the object to be measured 12 using the ultrasonic transmitting solid coupling unit 10 and the ultrasonic receiving solid coupling unit 13 can also refer to the corresponding description in publication number CN109283259A.

[0111] It should be noted that when the object 12 to be tested is subjected to solid-coupled ultrasonic scanning, the object 12 to be tested needs to be transported and made to pass through the solid-coupled ultrasonic scanning unit. Specifically, when the object 12 to be tested passes through the solid-coupled ultrasonic scanning unit, the object 12 to be tested will roll and contact with the corresponding transmitting roller and receiving roller along the conveying direction of the object 12 to be tested until the object 12 to be tested is transported through the solid-coupled ultrasonic scanning unit. It can be seen that after the transmitting roller and the receiving roller are assembled, they should remain in a rotatable state.

[0112] In order to obtain the ultrasonic scanning signal group, in the process of conveying the object 12 to be tested through the solid-coupled ultrasonic scanning unit, the ultrasonic control detection processing unit 1 controls the ultrasonic transmitting unit to transmit the ultrasonic signal to the object 12 to be tested, and then all the ultrasonic receiving units receive the generated ultrasonic signal, so that the ultrasonic scanning signal group can be obtained. As can be seen from the above description, Figure 1 In the embodiment shown in , the ultrasonic scanning signal in the ultrasonic scanning signal group should be an ultrasonic transmission signal. Of course, after the ultrasonic transmitting unit transmits the ultrasonic signal to the object 12 to be tested, it can also be configured to receive the ultrasonic signal. At this time, the ultrasonic reflection signal can be received by the ultrasonic transmitting unit, that is, the ultrasonic scanning signal can also be an ultrasonic reflection signal.

[0113] In one embodiment of the present invention, the ultrasonic transmitting unit comprises a transmitting transducer unit 11, and the transmitting transducer unit 11 comprises a transmitting array transducer 34 or a transmitting transducer group, wherein:

[0114] When the transmitting transducer unit 11 is a transmitting array transducer 34, the transmitting array transducer 34 includes a plurality of array transmitting transducer elements 35, and the array transmitting transducer elements 35 in the transmitting array transducer 34 are arranged in sequence along the axis direction of the transmitting roller;

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

[0116] Figure 1 An embodiment of an ultrasonic transmitting unit is shown in FIG. 1 . In the figure, the ultrasonic transmitting unit adopts a transmitting transducer unit 11, that is, a transducer is used to transmit ultrasonic waves; the transmitting transducer unit 11 can be a transmitting array transducer 34 or a transmitting transducer group; in addition, Figure 1 An embodiment of an ultrasonic receiving unit is also shown. In the figure, the ultrasonic receiving unit adopts a receiving transducer unit 14. It can be understood that the receiving transducer unit 14 can be a receiving array transducer or a receiving transducer group. The type adopted by the receiving transducer unit 14 should be consistent with the type adopted by the transmitting transducer unit 11. For example, when the transmitting transducer unit 11 adopts a transmitting array transducer 34, the receiving transducer unit 14 should also adopt a receiving array transducer; when the transmitting transducer unit 11 adopts a transmitting transducer group, the receiving transducer unit 14 should adopt a receiving transducer group.

[0117] For any transmitting array transducer 34, the transmitting array transducer 34 includes a plurality of array transmitting transducer elements 35. At this time, the array transmitting transducer elements 35 are distributed in an array, and a plurality of array transmitting transducer elements 35 are arranged along the axis direction 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. When working, the transmitting roller is generally in a vertical distribution state. At this time, multiple array transmitting transducer elements 35 are distributed in an array. Therefore, the direction of the array distribution is also in a vertical state. The length of the transmitting array transducer 34 should be less than the height of the transmitting roller, specifically, to meet the requirements of solid-coupled ultrasonic scanning of the object 12 to be tested.

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

[0119] During specific implementation, when the receiving transducer unit 14 adopts a receiving array transducer or a receiving transducer group, specific reference may be made to the above-mentioned descriptions of the corresponding transmitting array transducer 34 and the transmitting transducer group. That is, the receiving transducer unit 14 is different from the transmitting transducer unit 11 only in the position of the drum and the state of the configured ultrasonic transmission or ultrasonic reception. The same settings can be used for other matters. As for the case of the receiving transducer unit 14, it will not be explained in detail here.

[0120] In one embodiment of the present invention, when the ultrasonic emission solid coupling unit 10 includes a plurality of emission rollers, the plurality of emission rollers are sequentially arranged along the solid coupling ultrasonic scanning direction 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 drum is consistent;

[0122] For any transmitting transducer group in the transmitting drum, 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 in which the object 12 to be tested passes through the solid-coupled ultrasonic 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 at the same sequential position in the former transmitting roller.

[0124] Since the imaging resolution is affected by the size of the single-element transmitting transducer 32, in order to improve the imaging resolution, in specific implementation, according to the type of the object 12 to be measured, a plurality of transmitting rollers may be arranged in the ultrasonic transmitting solid coupling unit 10, and 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 solid-coupled ultrasonic scanning of the object 12 to be measured, such as 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 distributed in a corresponding manner 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 that of transmitting rollers, and the receiving rollers are distributed in a positive corresponding manner with the transmitting rollers, so as to meet the required solid-coupled ultrasonic scanning of the object 12 to be measured.

[0125] When multiple transmitting rollers are provided, a transmitting transducer unit 11 is provided in each transmitting roller; similarly, when multiple receiving rollers are provided, a receiving transducer unit 14 is provided in each receiving roller. It should be noted that when the transmitting transducer unit 11 adopts a transmitting array transducer 34, based on the characteristics of the transmitting array transducer 34, only one transmitting roller may be provided in the ultrasonic transmitting solid coupling unit 10; when the transmitting transducer unit 11 adopts a transmitting transducer group, multiple transmitting rollers should preferably be provided in the ultrasonic transmitting solid coupling unit 10. Figure 2 FIG. 2 shows an embodiment in which four transmitting rollers are arranged in the ultrasonic transmitting solid coupling unit 10 when the transmitting transducer unit 11 adopts a transmitting transducer group. In this case, four receiving rollers should be arranged in the ultrasonic receiving solid coupling unit 13.

[0126] In a specific implementation, when the transmitting transducer unit 11 adopts a transmitting transducer group, the number of single-element transmitting transducers 32 in each transmitting drum is consistent. As can be seen from the above description, the number of single-element receiving transducers 32 in each receiving drum is also the same and consistent with the number of single-element transmitting transducers 32 in the transmitting drum. Of course, when the transmitting transducer unit 11 adopts a 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] Depend on Figure 2As can be seen from the above description, in any transmitting roller, a plurality of single-element transmitting transducers 32 are coaxially distributed, and the distance between the centers of two adjacent single-element transmitting transducers 32 is z; for two adjacent transmitting rollers, the distance between the centers of the corresponding single-element transmitting transducers 32 in the two transmitting rollers is x. It can be seen that, for any receiving roller, a plurality of single-element receiving transducers 33 are also coaxially distributed, and the distance between the centers of two adjacent single-element receiving transducers 33 is z; for two adjacent receiving rollers, the distance between the centers of the corresponding single-element receiving transducers 33 in the two receiving rollers is also x.

[0128] In addition, for any two adjacent transmitting rollers, along the direction in which the object 12 to be tested passes through the solid-coupled ultrasonic 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. Figure 2 The distribution position relationship between the single-element transmitting transducers 32 in adjacent transmitting rollers is explained.

[0129] Figure 2 , an embodiment of an ultrasonic emission solid coupling unit 10 including a plurality of emission rollers is shown, wherein a first emission roller 24, a second emission roller 25, a third emission roller 26 and a fourth emission roller 27 are arranged in sequence in the ultrasonic emission solid coupling unit 10, and the arrangement direction of the first emission roller 24 pointing to the fourth emission roller 27 is the solid coupling ultrasonic scanning direction of the object to be tested 12. In the figure, the first emission roller 24 is adjacent to the second emission roller 25. At this time, along the direction of the object to be tested 12 passing through the solid coupling ultrasonic scanning unit, the second emission roller 25 is the latter emission roller, and the first emission roller 24 is the former emission roller. In the figure, the center of the first single-element emission transducer 32 in the second emission roller 25 is located below the center of the first single-element emission transducer 32 in the first emission roller 24. Similarly, it can be obtained that the center of the second single-element emission transducer 32 in the second emission roller 25 is located below the center of the second single-element emission transducer 32 in the first emission roller 24, and the same applies to other cases. In addition, the distribution position relationship between other two adjacent transmitting rollers and the single-element transmitting transducers 32 at the same sequential position in the transmitting roller can be referred to the description here.

[0130] Figure 2Also shown is an embodiment in which the ultrasonic receiving solid coupling unit 13 includes a plurality of receiving rollers, wherein a first receiving roller 28, a second receiving roller 29, a third receiving roller 30 and a 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 pointing to the fourth receiving roller 31 is the solid coupling ultrasonic scanning direction of the object to be tested 12; specifically, the first receiving roller 28 corresponds to the first transmitting roller 24, the second receiving roller 29 corresponds to the second transmitting roller 25, the third receiving roller 30 corresponds to the third transmitting roller 26, and the fourth receiving roller 31 corresponds to the fourth receiving roller 27. It should be noted that, similar to the two adjacent transmitting rollers, for any two adjacent receiving rollers, along the direction in which the object to be tested 12 passes 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 in 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 12 to be tested passing through the solid-coupled ultrasonic scanning unit, the second receiving roller 29 is the next receiving roller, and the first receiving roller 28 is the previous 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. Similarly, 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 the same applies to other situations. In addition, for the other two adjacent receiving rollers, and the distribution position relationship between the single-element receiving transducers 33 in the same order in the receiving rollers, please refer to the description here.

[0132] It should be noted that for a transmitting roller and a corresponding receiving roller, the single-element transmitting transducer 32 corresponds to the single-element receiving transducer 33 at the same sequential position. For example, if the first transmitting roller 24 corresponds to the first receiving roller 28, the center of the first single-element transmitting transducer 32 in the first transmitting roller 24 corresponds to the center of the first single-element receiving transmitting transducer 33 in the first receiving roller 28. In addition, it can be obtained that the center of the second single-element transmitting transducer 32 in the first transmitting roller 24 corresponds to the center of the second single-element receiving transmitting transducer 33 in the first receiving roller 28. For other situations, please refer to the description here and no longer give examples one by one.

[0133] The above shows an embodiment in which the solid-coupled ultrasonic scanning unit includes four transmitting rollers and four receiving rollers. When the solid-coupled ultrasonic scanning unit includes other numbers of transmitting rollers and receiving rollers, the corresponding descriptions above can be referred to, and the specific instructions shall be based on whether the solid-coupled ultrasonic scanning can be performed on the object to be measured 12. Examples will not be given one by one here.

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

[0135] In one embodiment of the present invention, for any two adjacent transmitting rollers, the center distance between 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 .

[0136] When the number of transmissions in the ultrasonic reflection solid coupling unit 10 is n, 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, such as Figure 2 In the embodiment, when the ultrasonic transmitting solid coupling unit 10 includes four transmitting rollers, the center distance between the two single-element transmitting transducers 32 at the same sequential position is z / 4. It should be noted that when the center distance between the two single-element transmitting transducers 32 at the same sequential position is z / n, the resolution of the corresponding ultrasonic image generated based on the ultrasonic detection information of the above object can be improved.

[0137] It can be seen from the above description that in the same transmitting drum, the distance between the corresponding centers of two adjacent single-element transmitting transducers 32 is z. Therefore, in a specific implementation, the corresponding distance z can be determined according to the type of the selected single-element transmitting transducer 32, and the specific method of determining z can be consistent with the existing method.

[0138] In one embodiment of the present invention, the ultrasonic control detection processing unit 1 includes an excitation control module 2 for driving an ultrasonic emitting unit, wherein:

[0139] The excitation control module 2 is adaptively connected to all the 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 adopts an electronic focusing method to control the working state of the corresponding transmitting array transducer 34 to configure the transmitting transducer unit to perform ultrasonic focusing scanning on the object to be measured 12 .

[0141] Figure 1 In the figure, an embodiment of the ultrasonic control detection processing unit 1 including the excitation control module 2 is shown. In the figure, the excitation control module 2 includes N transmitting channels 8, wherein 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 a transmitting transducer group, the number of all single-element transmitting transducers 32 should not be more than N, that is, one single-element transmitting transducer 32 is adaptively connected to a corresponding transmitting channel 8 through the transmitting channel coaxial line 9; when the transmitting transducer unit 11 adopts a transmitting array transducer 34, the number of all array transmitting transducer elements 35 should not be more than N. At this time, one array transmitting transducer element 35 is adaptively connected to the corresponding transmitting channel 8 through the transmitting channel coaxial line 9.

[0142] It can be seen from the above description that the number of receiving channels 16 in the receiving processing module 3 is also at least N. At this time, one receiving channel 16 is connected to a corresponding single-element receiving transducer 33 or an array receiving transducer array element through the receiving channel coaxial line 15. For details, please refer to the above description of the transmitting channel 8, which will not be repeated here.

[0143] It is understandable that the focusing area of ​​the single-element transmitting transducer 32 is often fixed and is affected by the size of the array element used by the single-element transmitting transducer 32, which results in the imaging resolution of the single-element transmitting transducer 32 being limited. The array element 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 adopts the electronic focusing method to control the working state of the corresponding transmitting array transducer 34, that is, the beam energy can be flexibly focused to the target position through the electronic focusing method, and the ultrasonic scanning within the range of the entire transmitting array transducer 34 can be realized by sequentially activating the array transmitting transducer elements 35 at different positions. Compared with the transmitting transducer group using the single-element transmitting transducer 32, the imaging resolution can be greatly improved.

[0144] It should be noted that during ultrasonic focusing scanning, the excitation control module 2 may configure some array transmitting transducer elements 35 to be in an ultrasonic transmitting state, but the receiving processing module 3 should configure all array receiving transducer elements to be in an ultrasonic receiving state at the same time.

[0145] In addition, it can be seen from the above description that when the transmitting transducer unit 11 adopts a transmitting array transducer 34, only one transmitting roller and one receiving roller can be used. When performing solid-coupled ultrasonic scanning on the object to be measured 12, the consistency requirements for the transmitting roller and the receiving roller can be reduced, and the single solid-coupled ultrasonic scanning time of the object to be measured 12 will not be increased.

[0146] In one embodiment of the present invention, when the excitation control module 2 uses an electronic focusing method to control the working state of the transmitting array transducer 34, at least the transmitting array transducer 34 is subjected to transmission delay control, transmission aperture control and / or amplitude tracking control to regulate the sound field energy of the ultrasonic wave emitted by the transmitting array transducer 34.

[0147] Figure 1 In the embodiment, a transmitting waveform control unit 4, a transmitting delay control unit 5, a transmitting aperture control unit 7 and an amplitude apodization control unit 6 are provided in the excitation control module 2, wherein the transmitting waveform control unit 4 can control the waveform of the ultrasonic wave transmitted by the array transmitting transducer element 35, the transmitting delay control unit 5 can adjust the delay of the ultrasonic wave transmitted by the array transmitting transducer element 35, the transmitting aperture control unit 7 can adjust the aperture of the ultrasonic wave transmitted by the array transmitting transducer element 35, and the amplitude apodization control unit 6 can control the amplitude apodization of the ultrasonic wave transmitted by the array transmitting transducer element 35; a specific explanation is given below.

[0148] Specifically, the transmitting waveform control unit 4 can generate a waveform signal for stimulating the transmitting array transducer 34, wherein the waveform can be a single pulse or a complex multi-cycle waveform, and its shape and frequency 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 the existing transmitting waveform control form, which is based on the ability to generate the required waveform signal.

[0149] The transmission delay control unit 5 is used to control the time delay of each array transmitting transducer element 35 in the exciting transmitting array transducer 34 to transmit ultrasonic waves. By accurately adjusting the transmission time of each array transmitting transducer element 35, beam forming control can be achieved, that is, controlling the direction and focal point of the ultrasonic beam, which enables the ultrasonic waves to be focused at a specific depth, thereby improving the lateral and axial resolution of the image.

[0150] It should be noted that the transmit aperture refers to the number of array transmit transducer elements 35 involved in transmitting ultrasound and their arrangement. The transmit aperture control unit 7 determines the required array transmit transducer elements 35 to be activated and how they work together to generate the required beam. By changing the transmit aperture, the size and shape of the ultrasound beam can be adjusted to meet the imaging requirements of different depths and ranges.

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

[0152] It should be noted that the transmit waveform control unit 4, the transmit delay control unit 5, the amplitude apodization control unit 6 and the transmit aperture control unit 7 can adopt existing commonly used forms, and the specific method and process of implementing the electronic focusing method for the transmit array transducer 34 can be consistent with the existing ones, which will not be repeated here.

[0153] When the transmitting transducer unit 11 adopts a transmitting transducer group, it is generally not necessary to adopt an electronic focusing method for control, but the waveform of the ultrasonic wave emitted by the single-element transmitting transducer 32 can be regulated by the above-mentioned transmitting waveform control unit 4. The specific control of the ultrasonic wave waveform is based on whether it can meet the required solid-coupled ultrasonic scanning of the object 12 to be measured.

[0154] In one embodiment of the present invention, after the object 12 to be tested is subjected to solid-coupled ultrasonic scanning, when an ultrasonic scanning image of the object 12 to be tested is generated using the acquired ultrasonic scanning signal group, the ultrasonic control detection processing unit 1 performs ultrasonic scanning signal reconstruction processing on the ultrasonic scanning signal group, wherein:

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

[0156] Arranging the extracted ultrasonic scanning signals based on the corresponding position information of the ultrasonic receiving units to generate position reconstruction ultrasonic scanning signals;

[0157] The ultrasonic scanning signal is reconstructed based on the above position to generate an ultrasonic scanning image of the object to be measured 12 .

[0158] It should be noted that when the object 12 to be tested is subjected to solid-coupled ultrasonic scanning, the object 12 to be tested is clamped by the transmitting roller and the receiving roller, and passes through all the rollers in sequence as the transmitting roller and the receiving roller rotate under the action of friction. During this period, the transmitting transducer unit 11 in the transmitting roller periodically transmits ultrasonic signals, and at the same time, the receiving transducer unit 13 in the receiving roller receives the ultrasonic scanning signal. When a certain horizontal coordinate x' position on the object 12 to be tested 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 a single-element transmitting transducer 32 of the same size, compared with using a single pair of rollers (one transmitting roller and one receiving roller), the resolution of the reconstructed image is improved from z to z / n.

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

[0160] Below Figure 2 The process of ultrasonic scanning signal reconstruction processing is specifically described with reference to the case of the ultrasonic receiving solid coupling unit 13.

[0161] During the solid-coupled ultrasonic scanning process, each receiving roller receives the ultrasonic scanning signal at the same time. Assuming that the lateral distance between the centers of each receiving roller is x, the distance between the center of the receiving roller and the surface of the object 12 to be measured is y, the receiving roller rotates at a uniform angular velocity of w (rad / s), and the time when the horizontal coordinate x' position on the object 12 to be measured passes through the first receiving roller 28 is t, then the time when the horizontal coordinate x' position on the object 12 to be measured passes through the corresponding centers of the second receiving roller 29, the third receiving roller 30, and the fourth receiving roller 31 are t+x / (w·y), t+2x / (w·y), and t+3x / (w·y), respectively. Therefore, for the ultrasonic scanning image of the horizontal coordinate x' position on the object 12 to be measured, the ultrasonic scanning signals received by the first receiving roller 28 to the fourth receiving roller 31 at time t, time t+x / (w·y), time t+2x / (w·y), and time t+3x / (w·y) can be reconstructed respectively to obtain a high-resolution ultrasonic scanning image.

[0162] The reconstruction process may be as follows: the ultrasonic scanning signals obtained by all the single-element receiving transducers 33 in the first receiving roller 28 to the fourth receiving roller 31 at the same position of the object 12 to be measured are sequentially rearranged according to the position information of the single-element receiving transducers 33. For example, for an imaging point with a horizontal coordinate of x' on the object 12 to be measured, the ultrasonic scanning signals at the corresponding moments of different receiving rollers are firstly taken out, and then the ultrasonic scanning signals are rearranged according to the single-element receiving transducers 33 (height information), as follows Figure 5 shown.

[0163] like Figure 5 In the middle, roller five corresponds to Figure 2 The first receiving roller 28, roller six corresponds to Figure 2 The second receiving roller 29 in the drum corresponds to the seventh roller Figure 2 The third receiving roller 30, roller eight corresponds to Figure 2In addition, transducer one corresponds to the first single-element receiving transducer 33 in the receiving roller, transducer two corresponds to the second single-element receiving transducer 33 in the receiving roller, transducer three corresponds to the third single-element receiving transducer 33 in the receiving roller, and transducer four corresponds to the fourth single-element receiving transducer 33 in the receiving roller. Figure 5 In the figure, a, b, c, d, etc. are ultrasonic scanning signals obtained at corresponding positions.

[0164] As can be seen from the above description, it is necessary to reconstruct the data of the ultrasonic scanning signals obtained by the single-element receiving transducers 33 in different receiving rollers, so a higher requirement is placed on the consistency between the receiving rollers, otherwise, the reconstructed image will be uneven 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 to complete a solid-coupled ultrasonic scanning is also increased accordingly.

[0165] In addition, when performing data reconstruction, the ultrasonic scanning signal obtained by the single-element receiving transducer 33 can be processed directly through ultrasonic scanning signal reconstruction to generate a corresponding ultrasonic scanning detection image without undergoing the above-mentioned signal-to-noise ratio enhancement processing and scanning signal analysis processing; of course, the above-mentioned signal-to-noise ratio enhancement processing and scanning signal analysis processing can also be performed. At this time, the scanning signal analysis processing specifically refers to data reconstruction of the ultrasonic scanning signal to generate an object ultrasonic scanning signal and an object ultrasonic detection signal, which is based on the ability to form an ultrasonic scanning detection image and will not be described in detail here.

[0166] It should be noted that when the transmitting transducer unit 11 adopts a transmitting array transducer 34, only one receiving roller and one corresponding transmitting roller may be used. Therefore, the consistency requirement between the transmitting roller and the receiving roller can be reduced, and the single solid-coupled ultrasonic scanning time of the object to be measured 12 will not be increased, and the operation of ultrasonic scanning signal reconstruction processing can also be omitted.

[0167] It can be seen from the above description that, based on the type of the ultrasonic scanning signal, the ultrasonic scanning signal-to-noise ratio enhancement signal is processed to generate ultrasonic scanning information of the object; specifically, the type of the ultrasonic scanning signal may be an ultrasonic transmission signal or an ultrasonic reflection signal, wherein the ultrasonic transmission signal may be formed by receiving a receiving array transducer, or by 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 the ultrasonic scanning signal-to-noise ratio enhancement signals are superimposed in phase to generate an ultrasonic scanning phase-superimposed signal after superimposition in phase, wherein the ultrasonic scanning signal-to-noise ratio enhancement signal is generated by the ultrasonic scanning signal after signal-to-noise ratio enhancement processing. Thereafter, the ultrasonic scanning phase-superimposed signal is loaded into the peak-to-peak value calculation unit 36 ​​to calculate the corresponding 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 enhancement 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] It can be seen from the above description that the ultrasonic scanning signal-to-noise ratio improvement signal is a digital signal formed by sampling, and the same-phase superposition can be achieved according to the waveform of the ultrasonic scanning signal-to-noise ratio improvement signal.

[0172] It can be understood that when performing in-phase superposition, it specifically means that for the ultrasonic scanning signals received by different ultrasonic receiving units at the same time, after generating the corresponding ultrasonic scanning signal-to-noise ratio improvement signals, all the 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 tested 12 at a certain position, multiple ultrasonic transmission signals can be simultaneously received by multiple receiving transducer units 14. After each ultrasonic transmission signal is subjected to signal-to-noise ratio enhancement processing, a corresponding ultrasonic transmission signal-to-noise ratio enhancement signal can be obtained. All current ultrasonic transmission signal-to-noise ratio enhancement 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 realized.

[0173] Figure 1An embodiment of a scanning signal analysis and processing unit is shown in the figure. In the figure, the scanning signal processing unit may include a delay superposition unit 20, a band-limited filter 21, a demodulation filter 22, an envelope detection unit 23 and a peak-to-peak value calculation unit 36. Specifically, the delay superposition unit 20 performs in-phase superposition on all ultrasonic scanning signal-to-noise ratio enhancement signals, the band-limited filter 21 can be used to perform band-limited filtering processing, the demodulation filter 22 can be used to perform demodulation filtering processing, the envelope detection unit 23 can be used to implement envelope detection, and the peak-to-peak value calculation unit 36 ​​can be used to implement peak-to-peak value calculation of the signal. Specifically,

[0174] Delay-and-Sum unit 20: Delay-and-Sum (DAS) is a commonly used beamforming technology. At this stage, different delays are applied to the ultrasonic scanning signal-to-noise ratio enhancement signal to compensate for the different lengths of the sound wave receiving paths. The purpose of this is to align the echo signals on all paths when superimposed, thereby enhancing the signal strength in the target direction. By superimposing 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-limiting filter 21 is used to limit the bandwidth of the signal and remove unnecessary 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 to be retained. Band-limiting filtering helps to improve the image clarity and resolution in subsequent processing steps.

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

[0177] The envelope detection unit 23 can generally be used to perform envelope detection on the ultrasonic reflection signal. Envelope detection is a signal processing method commonly used in ultrasonic imaging and is used to extract amplitude information of the ultrasonic reflection signal.

[0178] The peak-to-peak value calculation unit 36 ​​may generally be used to calculate the maximum value or peak value of the ultrasonic transmission signal. By calculating the maximum value or peak value of the ultrasonic transmission signal, it may be helpful to determine the boundaries of different structures in an image generated based on the ultrasonic transmission signal.

[0179] It should be noted that ultrasonic scanning information of the object can be generated based on the signal processed by ultrasonic transmission analysis. Generally, ultrasonic scanning information of the object can be directly generated based on the signal processed by ultrasonic transmission analysis, or the ultrasonic scanning signal of the object can be generated after necessary processing of the signal processed by ultrasonic transmission analysis, wherein necessary processing, such as filtering and other processing, can be selected according to actual needs, so as to meet the requirements of generating the required ultrasonic scanning signal of the object.

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

[0181] It can be understood that when the ultrasonic scanning signal group includes both ultrasonic transmission signals and ultrasonic reflection signals, the above-mentioned scanning signal analysis and processing should be performed on the ultrasonic transmission signals and the ultrasonic reflection signals respectively, so as to obtain the corresponding ultrasonic transmission analysis and processed signals and ultrasonic reflection analysis and processed signals respectively. At this time, the corresponding object ultrasonic scanning information can be generated based on the ultrasonic transmission analysis and processed signals and the ultrasonic reflection analysis and processed signals.

[0182] From the above description, the high-precision ultrasonic detection method of the present invention can be obtained. Specifically, for any object 12 to be tested that is suitable for solid-coupled ultrasonic scanning, the ultrasonic detection device described above is used to perform solid-coupled ultrasonic scanning detection on the object 12 to be tested, so as to generate object ultrasonic scanning information of the object 12 to be tested during the solid-coupled ultrasonic scanning detection process.

[0183] Specifically, the method and process of performing solid-coupled ultrasonic scanning detection on the object to be tested 12 using an ultrasonic detection device can refer to the above description, wherein an ultrasonic scanning signal group is obtained during the solid-coupled ultrasonic scanning detection process, and corresponding object ultrasonic scanning information is generated based on the ultrasonic scanning signal group. The specific method and process of generating the object ultrasonic scanning information can refer to the above description and will not be repeated 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 with the solid-coupled ultrasonic scanning unit, and used 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 solid-coupled ultrasonic scanning, wherein the ultrasonic scanning signal group includes a plurality of ultrasonic scanning signals; The ultrasonic scanning signal group is acquired, and scanning signal detection processing is performed by the ultrasonic control detection processing unit to generate object ultrasonic scanning information after performing the scanning signal detection processing, wherein: The scanning signal detection process at least includes signal-to-noise ratio improvement process and scanning signal analysis process, 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 signal-to-noise ratio enhancement processing, so as to generate object ultrasonic scanning information after the scanning signal analysis processing.

2. The high-precision ultrasonic detection device according to claim 1 is characterized in that: 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, a signal-to-noise ratio improvement process is performed on the ultrasonic scanning signal input to the signal-to-noise ratio improvement processing subunit.

3. The high-precision ultrasonic detection device according to claim 2 is characterized in that: 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 / or a second signal-to-noise ratio improvement processing, wherein: Before performing signal-to-noise ratio enhancement processing, the input ultrasonic scanning signal is converted to generate a corresponding ultrasonic scanning analog signal; When the first signal-to-noise ratio improvement process is performed, 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, firstly, the ultrasonic scanning analog signal or the ultrasonic scanning analog signal after the first signal-to-noise ratio improvement process is converted into a corresponding ultrasonic scanning digital signal. The ultrasonic scanning digital signals generated by the conversion are at least subjected to 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.

4. The high-precision ultrasonic detection device according to claim 2 is characterized in that: When the scanning signal analysis processing unit is used to perform the scanning signal analysis processing, it 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 object ultrasonic scanning information, wherein the object ultrasonic scanning information includes scanning signal peak-to-peak value, scanning signal envelope, flight time and / or spectrum characteristics.

5. The high-precision ultrasonic detection device according to any one of claims 1 to 4, characterized in that: The solid-coupled ultrasonic scanning unit includes an ultrasonic transmitting solid-coupled unit and an ultrasonic receiving solid-coupled unit, wherein: The ultrasonic transmitting solid coupling unit comprises at least one transmitting roller and an ultrasonic transmitting unit arranged in each transmitting roller; The ultrasonic receiving solid coupling unit comprises at least one receiving roller and an ultrasonic receiving unit arranged in each receiving roller; The transmitting roller in the ultrasonic transmitting solid coupling unit corresponds to the receiving roller in the ultrasonic receiving solid coupling unit; When the object to be tested is subjected to solid-coupled ultrasonic scanning, the object to be tested is transported to pass 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; During the process of conveying the object to be tested 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 generates an ultrasonic scanning signal group through the ultrasonic receiving unit.

6. The high-precision ultrasonic detection device according to claim 5 is characterized in that: The ultrasonic transmitting unit comprises a transmitting transducer unit, and the transmitting transducer unit comprises a transmitting array transducer or a transmitting transducer group, wherein: 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; 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 where they are located.

7. The high-precision ultrasonic detection device according to claim 6 is characterized in that: 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: When the transmitting transducer unit adopts a transmitting transducer group, the number of single-element transmitting transducers in each transmitting drum 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.

8. The high-precision ultrasonic detection device according to claim 6, characterized in that: For any two adjacent transmitting rollers, the center distance between 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 .

9. The high-precision ultrasonic detection device according to claim 6, characterized in that: The ultrasonic control detection processing unit includes an excitation control module for driving an ultrasonic transmitting unit, wherein: The excitation control module is adaptively connected to all the transmitting transducer units to drive the transmitting transducer units to work; 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.

10. The high-precision ultrasonic detection device according to claim 9, characterized in that: When the excitation control module uses the electronic focusing method to control the working state of the transmitting array transducer, at least the transmitting array transducer is subjected to transmission delay control, transmission aperture control and / or amplitude apodization control to regulate the sound field energy of the ultrasonic wave emitted by the transmitting array transducer.

11. The high-precision ultrasonic detection device according to claim 1, characterized in that: 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 at the corresponding moments of different receiving rollers are extracted for the target imaging points on the object to be measured; Arranging the extracted ultrasonic scanning signals based on the corresponding position information of the ultrasonic receiving units to generate position reconstruction ultrasonic scanning signals; The ultrasonic scanning signal is reconstructed based on the above positions to generate an ultrasonic scanning image of the object to be measured.

12. 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 11 is used to perform solid-coupled ultrasonic scanning detection on the object to be tested, so as to generate object ultrasonic scanning information of the object to be tested during the solid-coupled ultrasonic scanning detection process.

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