CN103487511B - Dynamic multi streaming channel ultrasonic signal processing method - Google Patents

Abstract

The invention relates to a dynamic multi-thread multi-channel ultrasonic signal processing device and a processing method, which belong to the technical field of ultrasonic automatic flaw detection. The processing device of the present invention includes a controller unit, an ultrasonic transceiver unit and an ultrasonic probe unit. The invention adopts a multi-threaded processing method to realize the dynamic completion of signal triggering and acquisition, noise suppression and defect analysis of multi-channel ultrasonic probes. Using the device and processing method of the present invention, independent threads are used for different processing processes and processing threads , using the advantages of multi-threaded computing of multi-threaded processors, simultaneously collects, processes and analyzes the ultrasonic signals of multiple ultrasonic channels, shares processor and memory resources, protects data from conflicts, and adopts a memory management method in the form of pointers. Reduce the time for moving data in the memory, thereby improving the efficiency of data collection, processing and analysis of ultrasonic signals, increasing the frequency of repeated transmission and reception of ultrasonic signal devices, and improving the reliability of ultrasonic automatic flaw detection devices.

Description

Dynamic multi-thread multi-channel ultrasonic signal processing method

technical field

The invention belongs to the technical field of ultrasonic automatic flaw detection, and in particular relates to a dynamic multi-thread and multi-channel ultrasonic signal processing device and processing method.

Background technique

Ultrasonic testing has a wide range of applications in the field of non-destructive testing technology. With the rapid development of computer systems and the continuous improvement of signal processing methods, ultrasonic automatic flaw detection systems have been widely used. The process of ultrasonic automatic flaw detection includes: automatic operation control The detection mechanism drives The ultrasonic probe performs scanning motion, automatically emits ultrasonic waves, automatically detects ultrasonic echo signals, and performs filtering, analysis and defect analysis of ultrasonic signals. The above-mentioned ultrasonic automatic flaw detection process requires the computer system to have a faster operating efficiency in order to increase the frequency of ultrasonic repeated transmission and reception during the scanning process.

The existing ultrasonic signal data processing process, from signal acquisition, signal processing to signal analysis, adopts sequential execution and single-threaded mode. It is necessary to wait for all data processing processes to be completed before entering the next ultrasonic transmission. The ultrasonic signal returns Wave acquisition-filtering-analysis data automatic processing process, when the sampling frequency is high, when processing multi-channel data at the same time, it is easy to have the problem of delay waiting, which reduces the frequency of repeated data acquisition, processing and analysis, especially In the process of ultrasonic flaw detection, the repetition frequency of ultrasonic transmission and reception is a crucial index. If the repetition frequency of ultrasonic transmission and reception is low, it will easily lead to the phenomenon of missed detection. Low-efficiency ultrasonic signal acquisition and processing devices and methods It will reduce the efficiency, accuracy and reliability of flaw detection work, and have a certain impact on the safety of flaw detection structures and parts.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the prior art, aim at multiple ultrasonic flaw detection channels, realize real-time emission of ultrasonic waves, collect ultrasonic signals, process and analyze ultrasonic signals of different channels at the same time, and improve the efficiency of ultrasonic emission and echo signal acquisition. repetition frequency, a multi-thread-based multi-channel ultrasonic signal transceiver device and processing method are proposed.

Technical scheme of the present invention is as follows:

A dynamic multi-thread multi-channel ultrasonic signal processing device is characterized in that: the ultrasonic signal processing device includes a controller unit, an ultrasonic transceiver unit and an ultrasonic probe unit; wherein the controller unit includes a multi-thread processor, at least one A/D converter, at least one D/A converter and at least one I/O controller; the multi-thread processor includes a signal collector, a noise suppressor and a defect analyzer; the ultrasonic transceiver unit includes at least An ultrasonic transceiver; the ultrasonic probe unit includes at least one ultrasonic probe; the input end of each A/D converter is connected to the ultrasonic echo signal output end of the corresponding ultrasonic transceiver; each of the The output end of a D/A converter is connected with the gain setting signal input end of the ultrasonic transceiver; the output end of each of the I/O controllers is connected with the ultrasonic trigger signal input end of the corresponding ultrasonic transceiver; the The ultrasonic excitation output end of each ultrasonic transceiver described above is connected with the ultrasonic excitation input end of the corresponding ultrasonic probe; the ultrasonic echo input end of each ultrasonic transceiver described is connected with the ultrasonic echo output end of the corresponding ultrasonic probe ; The signal collector includes at least one acquisition signal queue; the noise suppressor includes at least one filter signal queue; the defect analyzer includes at least one analysis signal queue; the signal collector from each A The /D converter collects the ultrasonic signal and puts it into the head of the corresponding collection signal queue; the noise suppressor reads the ultrasonic signal from the tail of each collection signal queue and puts it into the head of the corresponding filter signal queue; The defect analyzer described above reads the ultrasonic signal from the tail of each filtered signal queue and puts it into the head of the corresponding analysis signal queue.

The controller unit adopts one or a combination of computers, embedded computers, smart phones and smart tablet computers.

The multi-thread processor adopts one or a combination of multi-thread CPU, multi-thread GPU, FPGA and DSP.

The ultrasonic probe adopts one or a combination of piezoelectric ultrasonic probes, electromagnetic ultrasonic probes and laser ultrasonic probes.

The ultrasonic transceiver of the ultrasonic transceiver unit adopts one or a combination of piezoelectric ultrasonic transceivers, electromagnetic ultrasonic transceivers and laser ultrasonic transceivers corresponding to the type of ultrasonic probe.

A kind of dynamic multi-thread multi-channel ultrasonic signal processing method provided by the present invention is characterized in that the method comprises the following steps:

a) Allocate the acquisition signal queue storage area, which can store the addresses of L acquisition signal storage areas. The queue adopts a queue data structure in which the tail of the team enters the team and the head of the team leaves the team; the filter signal queue storage area is allocated, and M filter signals can be stored The address of the storage area, the queue adopts the queue data structure that enters at the tail of the queue and exits at the head of the queue; assigns the storage area of the analysis signal queue, which can store N analysis signal storage area addresses, and the queue adopts the queue entering at the tail of the queue and exiting at the head of the queue The queue data structure of the team;

b) Simultaneously start the ultrasonic signal acquisition thread, the ultrasonic signal noise suppression thread and the ultrasonic signal defect analysis thread;

c) The ultrasonic signal acquisition thread adopts the following steps:

i. Allocate a signal storage area, the address of which is P;

ii. read in the ultrasonic signal from the corresponding A/D converter, and put it into the data storage area whose address is P;

iii. Judging whether the collection signal queue is full, if it is full, wait until at least one position is vacated in the collection signal queue;

iv. The address P of the signal storage area is entered into the collection signal queue;

v. Whether the main program needs to end, if it ends, then end the thread, otherwise jump to step i;

D) described ultrasonic signal noise suppression thread comprises the steps:

i. Whether the filter signal queue is full, if not full, then jump to step ii, if full, then jump to step v;

ii. The address Q of the first signal storage area of the collection signal queue goes out of the queue;

iii. Carry out digital filter processing to the signal of address Q in the signal storage area, and suppress noise;

iv. Store the address Q of the signal storage area into the filter signal queue;

v. Whether the main program needs to end, if "Yes", then end the ultrasonic signal noise suppression thread; "No", then jump to step i;

E) described ultrasonic signal defect analysis thread comprises the following steps:

i. Analyze whether the signal queue is full, if not full, then jump to step ii, if full, then jump to step v;

ii. The head signal storage area address R of the filtered signal queue is out of the queue;

iii. Perform defect analysis on the signal at the address R of the signal storage area to identify defects;

iv. Save defect information;

v. Release the signal storage area space whose address is R;

vi. Whether the main program needs to end, if "Yes", clean up the data storage space corresponding to the address of all signal storage areas in the analysis signal queue, and end the ultrasonic signal defect analysis thread; "No", then jump to step i;

f) Whether the ultrasonic signal acquisition thread, ultrasonic signal noise suppression thread and ultrasonic signal defect analysis thread are all finished, if "Yes", the program ends, and if "No", wait for all threads to end.

Compared with the prior art, the present invention has the following advantages and outstanding effects:

The present invention adopts a multi-threaded processing method to realize the dynamic completion of signal triggering and acquisition, noise suppression and defect analysis of multi-channel ultrasonic probes. Using the device and processing method of the present invention, independent threads are used for different processing processes and processing threads , using the advantages of multi-threaded computing of multi-threaded processors, simultaneously collects, processes and analyzes the ultrasonic signals of multiple ultrasonic channels, shares processor and memory resources, protects data from conflicts, and adopts a memory management method in the form of pointers. Reduce the time for moving data in the memory, thereby improving the efficiency of data collection, processing and analysis of ultrasonic signals, increasing the frequency of repeated transmission and reception of ultrasonic signal devices, and improving the reliability of ultrasonic automatic flaw detection devices.

Description of drawings

Fig. 1 is a structural diagram of a dynamic multi-thread multi-channel ultrasonic signal processing device according to the present invention.

FIG. 2 is a signal flow diagram of the multi-thread processor of the embodiment shown in FIG. 1 .

FIG. 3 is a flowchart of a signal processing method in the embodiment shown in FIG. 1 .

1-controller unit; 10-multi-thread processor; 11-A/D converter;

12-D/A converter; 13-I/O controller;

101-signal collector; 102-noise suppressor; 103-defect analyzer;

104-acquisition signal queue; 105-filter signal queue; 106-analysis signal queue;

2-ultrasonic transceiver unit; 3-ultrasonic probe unit; 31-ultrasonic probe;

41-ultrasonic signal acquisition thread; 42-ultrasonic signal noise suppression thread; 43-ultrasonic signal analysis thread;

CPU-Central Processing Unit, central processing unit;

GPU-Graphics Processing Unit, graphics processor;

FPGA-Field Programmable Gate Array, Field Programmable Gate Array;

DSP-Digital Signal Processor, digital signal processor.

Detailed ways

The content of the specific structure and working principle of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is a structural diagram of a dynamic multi-threaded multi-channel ultrasonic signal processing device according to the present invention, which device includes a controller unit 1, an ultrasonic transceiver unit 2 and an ultrasonic probe unit 3; wherein, the described controller unit 1 includes multi-threaded Processor 10, at least one A/D converter 11, at least one D/A converter 12 and at least one I/O controller 13; Described multi-thread processor 10 includes signal collector 101, noise suppressor 102 and Defect analyzer 103; the ultrasonic transceiver unit 2 includes at least one ultrasonic transceiver 21; the ultrasonic probe unit 3 includes at least one ultrasonic probe 31; the input end of each of the A/D converters 11 corresponds to The ultrasonic echo signal output end of the ultrasonic transceiver 21 is connected; the output end of each of the D/A converters 12 is connected with the gain setting signal input end of the ultrasonic transceiver 21; each of the I/ The output end of O controller 13 is connected with the ultrasonic trigger signal input end of corresponding ultrasonic transceiver 21; The ultrasonic excitation output end of each ultrasonic transceiver 21 is connected with the ultrasonic excitation input end of corresponding ultrasonic probe 31; The ultrasonic echo input end of each ultrasonic transceiver 21 described above is connected with the ultrasonic echo output end of the corresponding ultrasonic probe 31; the described signal collector 101 includes at least one acquisition signal queue 104; the described noise suppressor 102 Including at least one filter signal queue 105; the defect analyzer 103 includes at least one analysis signal queue 106; the signal collector 101 collects ultrasonic signals from each A/D converter 11 and puts them into the corresponding acquisition signal queue 104 head; the noise suppressor 102 reads the ultrasonic signal from the tail in each acquisition signal queue 104 and puts it into the head of the corresponding filter signal queue 105; the defect analyzer 103 reads the ultrasonic signal from each filter signal The tail of the queue 105 reads the ultrasound signal and puts it into the head of the corresponding analysis signal queue 106 .

The controller unit 1 adopts one or a combination of computers, embedded computers, smart phones and smart tablet computers. In this embodiment, the controller unit 1 adopts a computer.

The multi-thread processor 10 adopts one or a combination of multi-thread CPU, multi-thread GPU, FPGA and DSP. In this embodiment, the multi-thread processor 10 adopts a CPU with four cores and eight threads.

The ultrasonic probe 31 adopts one or a combination of piezoelectric ultrasonic probes, electromagnetic ultrasonic probes and laser ultrasonic probes. In this embodiment, the ultrasonic probes 31 all use piezoelectric ultrasonic probes with a center frequency of 2.5 MHz.

The ultrasonic transceiver 21 of the ultrasonic transceiver unit 2 adopts one or a combination of piezoelectric ultrasonic transceivers, electromagnetic ultrasonic transceivers and laser ultrasonic transceivers corresponding to the type of ultrasonic probe 31 . In this embodiment, the ultrasonic transceivers 21 all use piezoelectric ultrasonic transceivers.

The described dynamic multi-thread multi-channel ultrasonic signal processing method adopts the following steps for each ultrasonic acquisition signal:

a) distribute collection signal formation 104 storage areas, can store the addresses of L collection signal storage areas, this formation adopts the queue data structure that the tail of the team enters the queue, and the head of the team goes out of the formation; distributes filter signal formation 105 storage areas, can store M The address of the filter signal storage area, this queue adopts the tail of the team to enter the team, and the queue data structure of the head of the team to go out of the team; the distribution analysis signal queue 106 storage areas can store N analysis signal storage area addresses, and this queue adopts the tail of the team to enter the team, The queue data structure of the head of the queue;

b) Simultaneously start the ultrasonic signal acquisition thread 41, the ultrasonic signal noise suppression thread 42 and the ultrasonic signal defect analysis thread 43;

c) The ultrasonic signal acquisition thread 41 adopts the following steps:

i. Allocate a signal storage area, the address of which is P;

ii. read in the ultrasonic signal from the corresponding A/D converter 11, and put it into the data storage area whose address is P;

iii. judging whether the collection signal queue 104 is full, if full, then wait until at least one position is vacant in the collection signal queue 104;

iv. The signal storage area address P enters the collection signal queue 104;

v. Whether the main program needs to end, if it ends, then end the thread, otherwise jump to step i;

D) described ultrasonic signal noise suppression thread 42 comprises the following steps:

i. Whether the filtered signal queue 120 is full, if not full, then jump to step ii, if full, then jump to step v;

ii. the queue head signal storage area address Q of the collection signal queue 104 goes out of the queue;

iii. carry out digital filter processing to the signal of signal storage area address Q, suppress noise; In the present embodiment, adopt band-pass filtering method, set lower cut-off frequency as 1.5MHz, upper cut-off frequency is 6MHz;

iv. Store the address Q of the signal storage area into the filter signal queue 105;

v. Whether the main program needs to end, if "Yes", then end the ultrasonic signal noise suppression thread; "No", then jump to step i;

E) described ultrasonic signal defect analysis thread 43 comprises the following steps:

i. whether the analysis signal queue 106 is full, if not full, then jump to step ii, if full, then jump to step v;

ii. The address R of the first signal storage area of the filter signal queue 105 goes out of the queue;

iii. Carry out defect analysis to the signal of the address R of the signal storage area to identify the defect; in this embodiment, the DAC curve threshold judgment method is used to analyze whether there is a defect signal in the signal;

iv. Save defect information;

v. Release the signal storage area space whose address is R;

vi. Whether the main program needs to end, if "Yes", the data storage space corresponding to all signal storage area addresses in the analysis signal queue 106 is cleaned up, and the ultrasonic signal defect analysis thread is ended; "No", then jump to step i;

f) Whether the ultrasonic signal acquisition thread 41, the ultrasonic signal noise suppression thread 42 and the ultrasonic signal defect analysis thread 43 are all finished, if "Yes", the program ends, and if "No", wait for all the threads to end.

The present invention adopts a multi-threaded processing method to realize the dynamic completion of signal triggering and acquisition, noise suppression and defect analysis of multi-channel ultrasonic probes. Using the device and processing method of the present invention, independent threads are used for different processing processes and processing threads , using the advantages of multi-threaded computing of multi-threaded processors, simultaneously collects, processes and analyzes the ultrasonic signals of multiple ultrasonic channels, shares processor and memory resources, protects data from conflicts, and adopts a memory management method in the form of pointers. Reduce the time for moving data in the memory, thereby improving the efficiency of data collection, processing and analysis of ultrasonic signals, increasing the frequency of repeated transmission and reception of ultrasonic signal devices, and improving the reliability of ultrasonic automatic flaw detection devices.

Claims (5)

1. a dynamic multi streaming channel ultrasonic signal processing method, is characterized in that: the signal processing apparatus that the method adopts comprises controller unit (1), ultrasonic Transmit-Receive Unit (2) and ultrasonic probe unit (3); Wherein, described controller unit (1) comprises multiline procedure processor (10), at least one A/D converter (11), at least one D/A converter (12) and at least one I/O controller (13); Described multiline procedure processor (10) comprises signal picker (101), noise suppressor (102) and defect analyzer (103); Described ultrasonic Transmit-Receive Unit (2) comprises at least one ultrasonic transceiver (21); Described ultrasonic probe unit (3) comprises at least one ultrasonic probe (31); The input end of described each A/D converter (11) connects with the ultrasound echo signal output terminal of corresponding ultrasonic transceiver (21); The output terminal of described each D/A converter (12) is connected with the gain set input end of ultrasonic transceiver (21); The described output terminal of each I/O controller (13) connects with the ultrasonic trigger pip input end of corresponding ultrasonic transceiver (21); The ultrasonic excitation output terminal of described each ultrasonic transceiver (21) connects with the ultrasonic excitation input end of corresponding ultrasonic probe (31); The ultrasonic echo input end of described each ultrasonic transceiver (21) connects with the ultrasonic echo output terminal of corresponding ultrasonic probe (31); Described signal picker (101) comprises at least one collection signal queue (104); Described noise suppressor (102) comprises at least one filtering signal queue (105); Described defect analyzer (103) comprises at least one analytic signal queue (106); Described signal picker (101) gathers ultrasonic signal from each A/D converter (11) and puts into corresponding collection signal queue (104) head; Described noise suppressor (102) reads ultrasonic signal from the afterbody each collection signal queue (104) and puts into the head of corresponding filtering signal queue (105); Described defect analyzer (103) reads ultrasonic signal from the afterbody each filtering signal queue (105) and puts into the head of corresponding analytic signal queue (106);

Described ultrasonic signal processing method comprises the steps:

A) distribute collection signal queue (104) memory block, can store the address of L collection signal memory block, this queue adopts tail of the queue to join the team, and head of the queue goes out the queue data structure of team; Distribute filtering signal queue (105) memory block, can the address of a store M filtering signal memory block, this queue employing tail of the queue is joined the team, and head of the queue goes out the queue data structure of team; Distribute analytic signal queue (106) memory block, can store address, N number of analytic signal memory block, this queue adopts tail of the queue to join the team, and head of the queue goes out the queue data structure of team;

B) start ultrasonic signal acquisition thread (41), ultrasonic signal squelch thread (42) and ultrasonic signal defect analysis thread (43) simultaneously;

C) the ultrasonic signal acquisition thread (41) described in adopts following steps:

I. distributing signal memory block, this address, memory block is P;

Ii. read in ultrasonic signal from the A/D converter (11) of correspondence, and put into the data storage area that address is P;

Iii. judge that whether collection signal queue (104) is full, if full, then wait for until at least one position is vacated in collection signal queue (104);

Iv. signal storage regional address P enters collection signal queue (104);

V. master routine is the need of end, if terminated, then terminates thread, otherwise jumps to step I;

D) the ultrasonic signal squelch thread (42) described in comprises the steps:

Whether i. filtering signal queue (120) is full, as less than, then jump to step I i, as full, then jump to step v;

The head of the queue signal storage regional address Q dequeue of ii. collection signal queue (104);

Iii. digital filtering process is carried out, restraint speckle to the signal of signal storage regional address Q;

Iv. by signal storage regional address Q stored in filtering signal queue (105);

V. master routine is the need of end, and "Yes" then terminates ultrasonic signal squelch thread; "No" then jumps to step I;

E) the ultrasonic signal defect analysis thread (43) described in comprises the steps:

Whether i. analytic signal queue (106) is full, as less than, then jump to step I i, as full, then jump to step v;

The head of the queue signal storage regional address R dequeue of ii. filtering signal queue (105);

Iii. defect analysis is carried out, defect recognition to the signal of signal storage regional address R;

Iv. defect information is preserved;

V. the space, signal storage that address is R is discharged;

Vi. master routine is the need of end, and "Yes" then clears up data space corresponding to all signal storage regional addresss in analytic signal queue (106), terminates ultrasonic signal defect analysis thread; "No" then jumps to step I;

Whether ultrasonic signal acquisition thread (41), ultrasonic signal squelch thread (42) and ultrasonic signal defect analysis thread (43) all terminate, and "Yes" then terminates program, and "No" then waits for that all threads all terminate.

2. a kind of dynamic multi streaming channel ultrasonic signal processing method according to claim 1, is characterized in that: described controller unit (1) adopts the combination of one or more in computing machine, embedded computer, smart mobile phone and Intelligent flat computer.

3. a kind of dynamic multi streaming channel ultrasonic signal processing method according to claim 1, is characterized in that: described multiline procedure processor (10) adopts the combination of one or more in multi thread CPU, multithreading GPU, FPGA and DSP.

4. a kind of dynamic multi streaming channel ultrasonic signal processing method according to claim 1, is characterized in that: described ultrasonic probe (31) adopts the combination of one or more in piezoelectric supersonic probe, electromagnetic ultrasonic probe and laser-ultrasound probe.

5. a kind of dynamic multi streaming channel ultrasonic signal processing method according to claim 4, is characterized in that: the ultrasonic transceiver (21) of described ultrasonic Transmit-Receive Unit (2) adopts the combination of one or more in piezoelectric supersonic transceiver, electromagnetic acoustic transceiver and the laser-ultrasound transceiver corresponding with ultrasonic probe (31) type.