阅读说明：本技术 一种基于超声波检测的柱状晶信息处理工艺 (Columnar crystal information processing technology based on ultrasonic detection ) 是由 杨嘉凯 潘文 于 2021-09-06 设计创作，主要内容包括：本发明涉及一种基于超声波检测的柱状晶信息处理工艺,包括以下步骤：S1：通过超声波探头接收材料内部超声回波信息；S2：通过编码器绑定探头的定位信息；S3：将一次纵波回波区域内的信息进行定向采集,以缩减最终原始数据体积；S4：通过ALOK算法对采集到的数据进行运算,并利用相关性原理将缺陷信号进行相关性增强。本发明的一种基于超声波检测的柱状晶信息处理工艺通过探头采集材料表面信息后,将一次纵波回波区域内的信息进行定向采集,抓取有效信息区域使得最终原始数据体积大大减少,最后通过ALOK算法对采集到的数据进行运算,并利用相关性原理将缺陷信号进行相关性增强,从而规避柱状晶非等时传播引起的相位不等时特性。(The invention relates to a columnar crystal information processing technology based on ultrasonic detection, which comprises the following steps: s1: receiving ultrasonic echo information inside the material through an ultrasonic probe; s2: binding positioning information of the probe through the encoder; s3: directionally acquiring information in the primary longitudinal wave echo region to reduce the volume of final original data; s4: and calculating the acquired data through an ALOK algorithm, and performing correlation enhancement on the defect signal by utilizing a correlation principle. According to the columnar crystal information processing technology based on ultrasonic detection, after the surface information of a material is collected through a probe, the information in a primary longitudinal wave echo area is directionally collected, an effective information area is captured, the volume of the final original data is greatly reduced, the collected data is operated through an ALOK algorithm, and the correlation of defect signals is enhanced by utilizing the correlation principle, so that the characteristic of unequal phase caused by unequal transmission of columnar crystals is avoided.)

1. A columnar crystal information processing technology based on ultrasonic detection is characterized by comprising the following steps:

s1: receiving ultrasonic echo information inside the material through an ultrasonic probe;

s2: binding positioning information of the probe through the encoder;

s3: directionally acquiring information in the primary longitudinal wave echo region to reduce the volume of final original data;

s4: and calculating the acquired data through an ALOK algorithm, and performing correlation enhancement on the defect signal by utilizing a correlation principle.

2. The process of claim 1, wherein in S1:

an acoustic scene with a long focal column, a small sound focus at the interface position of water and a metal material and a small sound transmission diffusion angle in the material is generated by focusing the arc wafer.

3. The process of claim 1, wherein in S2:

the excitation pulse synchronization is triggered by the exterior of the encoder, so that the ultrasonic excitation position is encoded.

4. The columnar crystal information processing process based on ultrasonic detection as claimed in claim 3, wherein: the ultrasonic excitation positions are kept at orderly intervals by the external trigger excitation pulse synchronization of the encoder.

5. The columnar crystal information processing process based on ultrasonic detection as claimed in claim 4, wherein: the automatically assigned acquisition information is calculated at 500 activations per second.

6. The columnar crystal information processing process based on ultrasonic detection as claimed in claim 4, wherein: the sampling depth of the automatically distributed acquisition information is 1024 points and 16 bits.

7. The columnar crystal information processing process based on ultrasonic detection as claimed in claim 4, wherein: in the automatically allocated collected information, the total data volume generation speed of a single detection channel is 1 Mbyte/s.

8. The process of claim 1, wherein in S3:

and marking a range needing to be acquired in the A-SCAN, automatically tracking through the information of the original signal acquisition gate tracking gate, and recording sampling time and a start bit.

9. The process of claim 1, wherein in S3:

and filtering a non-detection area transmitted by sound waves in water by using an intelligent tracking gate technology.

10. The process of claim 1, wherein in S4:

and performing correlation operation by using an ALOK algorithm of plates, pipes and bars to realize high signal-to-noise ratio detection and imaging of the cast material.

Technical Field

The invention relates to the technical field of columnar crystal processing technologies, in particular to a columnar crystal information processing technology based on ultrasonic detection.

Background

The coarse crystal is formed by growing columnar crystal grains vertical to a cooling surface in the material cooling process, non-isochronous transmission can be generated due to the fact that the sound velocity and the length of each crystal grain are not consistent, observed defect echoes can return in the form of scattering noise after an ultrasonic mechanical pulse passes through a multi-columnar crystal area, random sound pressure is generated after the ultrasonic transmission reaches a transducer, and the amplitude of the echoes output by a piezoelectric device is seriously weakened.

In a coarse-grain ultrasonic detection scene, generally, methods for enhancing signals include reducing detection frequency, phased array multi-angle original sound wave superposition synthesis, phased array multi-point transceiving noise averaging technology, and narrow-band filtering technology. However, the technologies bring the improvement of imaging effect to the casting copper billet; when using low frequency techniques, the minimum defect volume equivalent typically must be increased, subject to the wavelength. By using the phased array multi-angle original sound wave superposition and multi-point transceiving noise averaging technology, effective defect reflection angle information is only increased, but the involved algorithm and the calculation amount are very large, and a large amount of repetition frequency is consumed for imaging transceiving, so that the imaging speed is slow.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the defect that the amplitude of an echo output by a piezoelectric device is seriously weakened due to random sound pressure generated by a coarse-grained metal material during ultrasonic detection in the prior art, and provide a columnar crystal information processing technology based on ultrasonic detection.

In order to solve the technical problem, the invention provides a columnar crystal information processing technology based on ultrasonic detection, which comprises the following steps:

s1: receiving ultrasonic echo information inside the material through an ultrasonic probe;

s2: binding positioning information of the probe through the encoder;

s3: directionally acquiring information in the primary longitudinal wave echo region to reduce the volume of final original data;

s4: and calculating the acquired data through an ALOK algorithm, and performing correlation enhancement on the defect signal by utilizing a correlation principle.

As a further improvement of the present invention, in S1:

an acoustic scene with a long focal column, a small sound focus at the interface position of water and a metal material and a small sound transmission diffusion angle in the material is generated by focusing the arc wafer.

As a further improvement of the present invention, in S2:

the excitation pulse synchronization is triggered by the exterior of the encoder, so that the ultrasonic excitation position is encoded.

As a further improvement of the invention, the ultrasonic excitation position distance is kept at ordered intervals by the synchronization of the excitation pulse triggered outside the encoder.

As a further refinement of the invention, the automatically assigned acquisition information is calculated at 500 activations per second.

As a further improvement of the invention, the sampling depth of the collected information after automatic allocation is 1024 points and 16 bits.

As a further improvement of the invention, in the collected information after automatic allocation, the total data volume generation speed of a single detection channel is 1 Mbyte/s.

As a further improvement of the present invention, in S3:

and marking a range needing to be acquired in the A-SCAN, automatically tracking through the information of the original signal acquisition gate tracking gate, and recording sampling time and a start bit.

As a further improvement of the present invention, in S3:

and filtering a non-detection area transmitted by sound waves in water by using an intelligent tracking gate technology.

As a further improvement of the present invention, in S4:

and performing correlation operation by using an ALOK algorithm of plates, pipes and bars to realize high signal-to-noise ratio detection and imaging of the cast material.

Compared with the prior art, the technical scheme of the invention has the following advantages:

according to the columnar crystal information processing technology based on ultrasonic detection, after the surface information of a material is collected through a probe, the information in a primary longitudinal wave echo area is directionally collected, an effective information area is captured, the volume of the final original data is greatly reduced, the collected data is operated through an ALOK algorithm, and the correlation of defect signals is enhanced by utilizing the correlation principle, so that the characteristic of unequal phase caused by unequal transmission of columnar crystals is avoided.

Drawings

In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the present disclosure taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a schematic flow chart of a process for processing columnar crystal information based on ultrasonic detection in a preferred embodiment of the present invention;

FIG. 2 is a schematic view of the ultrasonic transmission path in the preferred embodiment of the present invention;

FIG. 3 is a graph of a prior art A-SCAN waveform and the location of a defect echo within the corresponding inspection area;

FIG. 4 is a graph of the A-SCAN waveform and the location of a defect echo within the corresponding inspection area in a preferred embodiment of the present invention.

Detailed Description

The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.

It will be understood that when an element is referred to as being "disposed on," "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "secured" to, or "fixedly coupled" to another element, it can be removably secured or non-removably secured to the other element. When an element is referred to as being "connected," "pivotally connected," to another element, it can be directly connected to the other element or intervening elements may also be present. The use of the terms "vertical," "horizontal," "left," "right," "up," "down," and the like are for illustrative purposes only and do not denote a single embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The terms "first," "second," "third," and the like in the description herein do not denote any particular quantity or order, but rather are used to distinguish one element from another.

In some embodiments, referring to fig. 1-2, a process for processing columnar crystal information based on ultrasonic detection according to the present invention includes the following steps:

s1: receiving ultrasonic echo information inside the material through an ultrasonic probe;

s2: binding positioning information of the probe through the encoder;

s3: directionally acquiring information in the primary longitudinal wave echo region to reduce the volume of final original data;

s4: calculating the acquired data through an ALOK algorithm, and performing correlation enhancement on the defect signal by using a correlation principle;

after receiving the internal ultrasonic echo information of the material through the ultrasonic probe, the positioning information of the probe is bound through the encoder, the sampling data comprises a data matrix of information of spatial position, time and amplitude, the signal to noise ratio of the defect echo is improved, in the information acquisition process, the signal acquisition aspect is screened on the premise of limited resources, most of sound waves are removed from the information transmitted in water, the information in a primary longitudinal wave echo area is directionally acquired, an effective information area is grabbed, the volume of the final original data is reduced, the probe can be subjected to correlation operation through the whole position of the defect, the time and the process of amplitude change through an ALOK algorithm, and stray noise is averagely filtered in a scene with high noise to increase the amplitude of the defect signal.

In some embodiments, in S1:

an acoustic scene with a long focal column, a small sound focus at the interface position of water and a metal material and a small sound transmission diffusion angle in the material is generated by focusing the arc wafer. Therefore, by utilizing the acoustic characteristics of the columnar crystals, the propagation direction can propagate along the growth direction of the columnar crystals, and the characteristic of unequal phase caused by unequal-time propagation of the columnar crystals is avoided.

In some embodiments, in S2:

the excitation pulse synchronization is triggered by the exterior of the encoder, so that the ultrasonic excitation position is encoded. Therefore, the position information of the ALOK algorithm can be accurately corresponded, namely, the acoustic detection data of each positioning point can be more accurately obtained.

In one embodiment, the ultrasonic excitation positions are kept at ordered intervals by the encoder external trigger excitation pulse synchronization. The ultrasonic excitation positions are distributed at intervals in order, and the accuracy of the position information of the ALOK algorithm is further improved.

In one embodiment, the automatically assigned acquisition information is calculated at 500 activations per second.

In one embodiment, the sampling depth of the automatically allocated acquisition information is 1024 points and 16 bits. The depths that 1024 sampling points can be collected in different materials are respectively: sampling depth of 1024 points of 100MHzADC, corresponding to water in a scanned area: 7.4mm, steel: 30.2mm, copper: 30.72 mm.

Preferably, in the collected information after automatic allocation, the total data volume generation speed of a single detection channel is 1 Mbyte/s. Continuous data acquisition and storage can be realized on common hardware.

In some embodiments, referring to fig. 3-4, in S3:

and marking a range needing to be acquired in the A-SCAN, automatically tracking through the information of the original signal acquisition gate tracking gate, and recording sampling time and a start bit. And limited depth recording of the raw sampled amplitude data from the ADC.

In one embodiment, in S3:

and filtering a non-detection area transmitted by sound waves in water by using an intelligent tracking gate technology. Because the sound velocity of water is slower, can avoid the effective area in the metal material to be shortened through accurate filtration water signal.

Preferably, taking a plate as an example, in water immersion flaw detection, sound waves are transmitted to the interior of a metal material through a water coupling agent and meet defects to form reflected echoes; in the detection process, the distance between the probe and the metal material cannot be guaranteed to be completely parallel, the distance is changed to a certain extent, however, the time consumed by the transmission of the probe in water is long, if the gate is collected in a fixed range, effective data in actual data are few, and the effective data are easy to exceed the collection range; the intelligent tracking gate automatically removes sampling point loss caused by water layer change by using a strong reflection signal between water and metal as a judgment condition, and judges and triggers by using an interface signal exceeding the gate amplitude; because the water interface information needs to be preserved in the acquisition process, the gate arranged on the conventional ultrasonic interface cannot acquire the water interface of the region before triggering, and the embodiment allows the triggering signal to be found in the processing process once by storing a certain data depth, and performs backtracking on the front 64 sampling points of the triggering signal, so as to realize the processing mode of triggering the front.

In some embodiments, in S4:

and performing correlation operation by using an ALOK algorithm of plates, pipes and bars to realize high signal-to-noise ratio detection and imaging of the cast material. The correlation operation is carried out through the ALOK algorithm of the plates, the pipes and the bars, so that the signals of real defect areas can be enhanced, and the high signal-to-noise ratio detection and imaging of the cast materials are realized.

Wherein the overall data structure is shown in table 1:

table 1. overall data structure table one set of raw data is shown in table 2:

TABLE 2 set of raw data tables

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the spirit or scope of the invention.