CN102645487A - Electromagnetic ultrasonic guided wave device - Google Patents
Electromagnetic ultrasonic guided wave device Download PDFInfo
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- CN102645487A CN102645487A CN2012101421935A CN201210142193A CN102645487A CN 102645487 A CN102645487 A CN 102645487A CN 2012101421935 A CN2012101421935 A CN 2012101421935A CN 201210142193 A CN201210142193 A CN 201210142193A CN 102645487 A CN102645487 A CN 102645487A
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Abstract
The invention discloses an electromagnetic ultrasonic guided wave device. A signal processing and modulation module and a signal pre-receiving and power amplifier module are directly fixed on a casing at the bottom of an instrument installation box of the electromagnetic ultrasonic guided wave device; an instrument emission signal connection port is connected with a power amplifier circuit output port in a signal pre-amplification and power amplifier circuit; an instrument receiving signal connection port is connected with a preamplifier circuit input port in the signal pre-amplification and power amplifier circuit; each part is fixed by means of positioning holes and screws in an excitation magnetization circuit; and the instrument emission signal connection port and the instrument receiving signal connection port are directly fixed on a front cover of the instrument installation box of the electromagnetic ultrasonic guided wave device. According to the electromagnetic ultrasonic guided wave device, coupling media are not required, and long detection distances and the detection accuracy can be provided while the high efficiency can be achieved.
Description
Technical field
The present invention relates to a kind of ultrasound examination instrument, relate to the electromagnetic ultrasonic guide wave device more specifically.Detection efficiency is higher, and defect location is accurate, and pick-up unit is more simple.
Background technology
Domestic present known piezoelectric-type ultrasonic wave inspection; Often need couplant could realize and measured piece between good coupling; And the surface quality to measured piece is had relatively high expectations, thereby is difficult to be applicable to the testing environment of high temperature, high speed and rough surface, and detects for the heavy construction of burying ground reinforcing bar and bridge cable wire and so on; Conventional piezoelectric supersonic detection needs to drop into lot of manpower and material resources could satisfy the detection conditions needed; Because shear wave or the decay of compressional wave in steel that conventional piezoelectric supersonic excites, single detects effective range also can be limited, and detection efficiency is also lower.
Summary of the invention
The objective of the invention is to be to provide a kind of electromagnetic ultrasonic guide wave device.This device can improve detection efficiency effectively, and can have under the prerequisite of high measurement accuracy, realizes the long distance detecting of high speed to the special geometry object.
The generation of electromagnetic ultrasonic guide wave signal need possess three key elements: eddy current signal, measured piece in the level constant magnetic field in the measured piece, the nearly surface of measured piece.Conventional piezoelectric supersonic is to be acted directly on the probe wafer by electric signal; Inspire ultrasound wave; And electromagnetic acoustic is horizontal magnetic field and current vortex acting in conjunction by interior, produces Lorentz force, makes interior generation mechanical vibration produce ultrasound wave; This mode has determined the ultrasonic excitation efficient of electromagnetic acoustic will be lower than conventional piezoelectric supersonic, thereby will add pre-amplification circuit at signal receiving end the ultra-weak electronic signal of adopting is done preparatory processing and amplifying.
For realizing above-mentioned purpose, adopt following technical scheme:
A kind of electromagnetic ultrasonic guide wave device comprises the excitation magnetized module, and signal receives in advance to be handled and power amplifier module, signal Processing and modulation module, and the probe adapter is characterized in that:
In the excitation magnetized module:
Comprise the first aluminum alloy junction member, the second aluminum alloy junction member, the first right angle lead foot, the second right angle lead foot, the first magnetic conduction boots, the second magnetic conduction boots, the several parts of excitation source are formed.
Folded being stacked together by identical polar of permanent magnet that excitation source is processed by rare earth material rubidium iron boron formed, and makes it reach the required magnetization.
Clamping device is made up of the structural member splicing of the first aluminum alloy junction member and two aluminum alloy materials of the second aluminum alloy junction member, and the both sides of each structural member all have 3 pilot holes respectively.
The first right angle lead foot and the second right angle lead foot are formed by the low-carbon steel material of two high magnetic permeabilities, in order to conducting and change the magnetic circuit direction of excitation source.
The first magnetic conduction boots and the second magnetic conduction boots are also processed by low-carbon steel material, and are the same with the function of right angle lead foot, and different is in order the excitation magnetizing assembly to be fitted with measured workpiece better, to increase the magnetic flux density in the unit area.
At first excitation source is fixed in the clamping device of being made up of the first aluminum alloy junction member and the second aluminum alloy junction member; Be respectively charged into the first right angle lead foot and the second right angle lead foot of low-carbon steel material then at the two ends of clamping device; Excitation source, the first right angle lead foot and the second right angle lead foot are fixed up with screw through the pilot hole on the first aluminum alloy junction member and the second aluminum alloy junction member, at last through screw with the first magnetic conduction boots be fixed on the first right angle lead foot, the second magnetic conduction boots are fixed on the second right angle lead foot.
Signal receives in processing and the power amplifier module in advance:
Comprise pre-amplification circuit (AD8250), amplifying circuit (AD8099), power amplification circuit (MP108U), modulation signal input port, preposition preparatory amplifying signal output port each several part.
In signal Processing and the modulation module:
Comprise main signal amplifying circuit (AD604), sample circuit (AD9215), field programmable gate array (EP2C20F256); Master controller (ARM9200); Signal modulation circuit (AD9833), modulation signal output port, preposition preparatory amplifying signal input port each several part.
Signal receives processing and power amplifier module and signal Processing and modulation module in advance and is fixed on the positioning stud of instrument mounting box housing bottom with screw respectively, and amplifying circuit (AD8099) links to each other with preposition preparatory amplifying signal input port through preposition preparatory amplifying signal output port with main signal amplifying circuit (AD604); Signal modulation circuit (AD9833) links to each other with the modulation signal input port through the modulation signal output port with power amplification circuit (MP108U); The output signal of power amplification circuit (MP108U) directly links to each other with the instrument connectivity port that transmits through lead, and instrument receives the signal connection end mouth and directly links to each other with the input of pre-amplification circuit (AD8250) through lead.
In the probe adapter:
Comprise the connectivity port that transmits of popping one's head in, probe received signal connectivity port, transmitting probe connectivity port, receiving transducer connectivity port, transmitting probe, receiving transducer each several part.
Adapter is as mating with probe; Be equivalent to the bridge-set between instrument and the probe; Transmitting probe and receiving transducer are connected on transmitting probe connectivity port and the receiving transducer connectivity port, and transmitting probe connectivity port, receiving transducer connectivity port directly link to each other with transmit connectivity port, probe received signal connectivity port of probe respectively on circuit board.
Compared with prior art, the present invention has following advantage and beneficial effect:
Detection efficiency of the present invention is higher, and defect location is accurate, and pick-up unit is more simple.
Description of drawings:
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
Fig. 1 is a kind of apparatus structure synoptic diagram of electromagnetic ultrasonic guide wave device.
Fig. 2 receives processing and power amplifier module structural drawing in advance for a kind of signal of electromagnetic ultrasonic guide wave device.
Fig. 3 is a kind of signal Processing and modulation module structural drawing of electromagnetic ultrasonic guide wave device.
The oscillogram that Fig. 4 collects for a kind of electromagnetic ultrasonic guide wave device.
Fig. 5 a is a kind of excitation magnetized module structural drawing of electromagnetic ultrasonic guide wave device.
Fig. 5 b is the AA cut-open view of Fig. 5 a.
Fig. 6 is a kind of probe adapter structure figure of electromagnetic ultrasonic guide wave device.
Fig. 7 is a kind of signal connection layout of electromagnetic ultrasonic guide wave device.
Wherein: 1-excitation magnetized module, 2-signal receive in advance to be handled and power amplifier module, 3-signal Processing and modulation module, the 4-adapter of popping one's head in; The 11a-first aluminum alloy junction member, the 11b-second aluminum alloy junction member, the 12a-first right angle lead foot, the 12b-second right angle lead foot; The 13a-first magnetic conduction boots, the 13b-second magnetic conduction boots, 14-excitation source, 21-pre-amplification circuit (AD8250); 22-amplifying circuit (AD8099), 23-power amplification circuit (MP108U), 24-modulation signal input port, the preposition preparatory amplifying signal output port of 25-; 31-main signal amplifying circuit (AD604), 32-sample circuit (AD9215), 33-field programmable gate array (EP2C20F256), 34-master controller (ARM9200); 35-signal modulation circuit (AD9833), 36-modulation signal output port, the preposition preparatory amplifying signal input port of 37-, the 41a-probe connectivity port that transmits; 41b-probe received signal connectivity port, 42a-transmitting probe connectivity port, 42b-receiving transducer connectivity port, 43a-transmitting probe; 43b-receiving transducer, 51-instrument mounting box, 52-instrument mounting box protecgulum, the 53a-instrument connectivity port that transmits; The 53b-instrument receives signal connection end mouth, 61-transmitting probe line, 62-receiving transducer line.
Embodiment:
A kind of electromagnetic ultrasonic guide wave device comprises excitation magnetized module 1, and signal receives in advance to be handled and power amplifier module 2, signal Processing and modulation module 3, and probe adapter 4 is characterized in that:
In the excitation magnetized module 1:
Comprise the first aluminum alloy junction member 11a, the second aluminum alloy junction member 11b, the first right angle lead foot 12a, the second right angle lead foot 12b, the first magnetic conduction boots 13a, the second magnetic conduction boots 13b, excitation source 14 several parts are formed.
Folded being stacked together by identical polar of permanent magnet that excitation source 14 is processed by rare earth material rubidium iron boron formed, and makes it reach the required magnetization.
Clamping device is made up of the structural member splicing of the first aluminum alloy junction member 11a and two aluminum alloy materials of the second aluminum alloy junction member 11b, and the both sides of each structural member all have 3 pilot holes respectively.
The first right angle lead foot 12a and the second right angle lead foot 12b form by the low-carbon steel material of two high magnetic permeabilities, in order to conducting and change the magnetic circuit direction of excitation source.
The first magnetic conduction boots 13a and the second magnetic conduction boots 13b also process by low-carbon steel material, and be the same with the function of right angle lead foot, and different is in order the excitation magnetizing assembly to be fitted with measured workpiece better, to increase the magnetic flux density in the unit area.
At first excitation source 14 is fixed in the clamping device of being made up of the first aluminum alloy junction member 11a and the second aluminum alloy junction member 11b; Be respectively charged into the first right angle lead foot 12a and the second right angle lead foot 12b of low-carbon steel material then at the two ends of clamping device; Excitation source 14, the first right angle lead foot 12a and the second right angle lead foot 12b are fixed up with screw through the pilot hole on the first aluminum alloy junction member 11a and the second aluminum alloy junction member 11b, through screw the first magnetic conduction boots 13a are fixed at last that the first right angle lead foot 12a goes up, the second magnetic conduction boots 13b is fixed on the second right angle lead foot 12b.
Signal receives in processing and the power amplifier module 2 in advance:
Comprise pre-amplification circuit 21 (AD8250), amplifying circuit 22 (AD8099), power amplification circuit 23 (MP108U), modulation signal input port 24, preposition preparatory amplifying signal output port 25 each several parts.
In signal Processing and the modulation module 3:
Comprise main signal amplifying circuit 31 (AD604); Sample circuit 32 (AD9215); Field programmable gate array 33 (EP2C20F256), master controller 34 (ARM9200), signal modulation circuit 35 (AD9833); Modulation signal output port 36, preposition preparatory amplifying signal input port 37 each several parts.
Signal receives processing in advance and power amplifier module 2 is fixed on the positioning stud of instrument mounting box 51 housing bottoms with screw respectively with signal Processing and modulation module 3, and amplifying circuit 22 (AD8099) links to each other with preposition preparatory amplifying signal input port 37 through preposition preparatory amplifying signal output port 25 with main signal amplifying circuit 31 (AD604); Signal modulation circuit 35 (AD9833) links to each other with modulation signal input port 24 through modulation signal output port 36 with power amplification circuit 23 (MP108U); The output signal of power amplification circuit 23 (MP108U) directly links to each other with the instrument connectivity port 53a that transmits through lead, and instrument receives signal connection end mouth 53b and directly links to each other with the input of pre-amplification circuit 21 (AD8250) through lead.
In the probe adapter 4:
Comprise the connectivity port 41a that transmits that pops one's head in, probe received signal connectivity port 41b, transmitting probe connectivity port 42a, receiving transducer connectivity port 42b, transmitting probe 43a, receiving transducer 43b each several part.
Adapter is as mating with probe; Be equivalent to the bridge-set between instrument and the probe; Transmitting probe 43a and receiving transducer 43b are connected on transmitting probe connectivity port 42a and the receiving transducer connectivity port 42b, and transmitting probe connectivity port 42a, receiving transducer connectivity port 42b directly link to each other with transmit connectivity port 41a, probe received signal connectivity port 41b of probe respectively on circuit board.
In Fig. 1, transmit connectivity port 53a and instrument of instrument receives signal connection end mouth 53b and is directly installed on the instrument mounting box protecgulum 52.
In Fig. 2, signal receives processing in advance and power amplifier module 2 is made up of pre-amplification circuit and power amplification circuit.Pre-amplification circuit (AD8250) 21 and amplifying circuit (AD8099) 22 link to each other through circuit connection; Instrument receives the signal on the signal connection end mouth 53b; Directly import pre-amplification circuit (AD8250) 21; Convert behind the single-ended signal again double-end signal into input amplifying circuit (AD8099) 22 and do further signal and amplify, output to preposition preparatory amplifying signal output port 25 at last, accomplish pre-service to received signal; Modulation signal output port 36 directly links to each other through lead with modulation signal input port 24; Pumping signal through after signal modulation circuit (AD9833) 35 processing is passed through modulation signal output port 36 direct input modulating signal input ports 24; The direct power input amplifying circuit of the pumping signal of modulation signal input port 24 (MP108U) 23; Modulation signal is carried out power amplification, increase its driving force, output to the instrument connectivity port 53a that transmits then.
In Fig. 3, digital signal processing and modulation module 3 are made up of main amplifying circuit, signal processing circuit and modulation circuit.Signal modulation circuit (AD9833) 35 directly directly links to each other with field programmable gate array (EP2C20F256) 33 on circuit board; Field programmable gate array (EP2C20F256) 33 direct control signal modulation circuits (AD9833) 35 obtain needed excitation output signal; Preposition preparatory amplifying signal output port 25 directly links to each other through lead with preposition preparatory amplifying signal input port 37; The direct incoming host signal amplifying circuit of the signal of preposition preparatory amplifying signal input port 37 (AD604) 31; Main signal amplifying circuit (AD604) 31 links to each other with sample circuit (AD9215) 32 on circuit board, and analog signal conversion is become digital signal; Sample circuit (AD9215) 32 links to each other with field programmable gate array (EP2C20F256) 33 on circuit board; Field programmable gate array links to each other with master controller (ARM9200) 34 on circuit board; Field programmable gate array (EP2C20F256) 33 is handled the digital signal that receives, be sent to host computer by master controller (ARM9200) 34 through network after the storage through sample waveform; Like PC (PC) etc., carry out Wave data and show and analyze.
In Fig. 5, the south of excitation magnetizing assembly, two ends, the arctic directly contact measured piece through magnetic conduction boots 13a, 13b, in measured piece, produce the level constant magnetic field from north orientation south.
In Fig. 6; With transmitting probe 43a and receiving transducer 43b through being connected the below that probe adapter 4 is installed in the excitation magnetizing assembly; Transmitting probe 43a is connected to probe adapter 4 through transmitting probe connectivity port 42a, and receiving transducer 43b is connected to probe adapter 4 through receiving transducer connectivity port 42b.The emission pumping signal is through the instrument connectivity port 53a that transmits; Link to each other through transmitting probe line 61 and the probe connectivity port 41a that transmits; Be loaded on the transmitting probe 43a by transmitting probe connectivity port 42a again; Directly drive transmitting probe 43a, produce eddy current signal with the nearly surf zone of measured piece in horizontal magnetic field; Probe received signal connectivity port 41b directly is communicated with on adapter with receiving transducer connectivity port 42b; The electric signal that receiving transducer 43b receives directly is sent on the 41b of probe received signal connectivity port through receiving transducer connectivity port 42b, is transported to instrument via receiving transducer line 62 again and receives signal connection end mouth 53b.
Claims (1)
1. an electromagnetic ultrasonic guide wave device comprises excitation magnetized module (1), and signal receives in advance to be handled and power amplifier module (2), signal Processing and modulation module (3), and probe adapter (4) is characterized in that:
Excitation magnetized module (1) comprises the first aluminum alloy junction member (11a), the second aluminum alloy junction member (11b), the first right angle lead foot (12a), the second right angle lead foot (12b), the first magnetic conduction boots (13a), the second magnetic conduction boots (13b), excitation source (14);
Folded being stacked together by identical polar of permanent magnet that excitation source (14) is processed by rare earth material rubidium iron boron formed;
Clamping device is made up of the structural member splicing of the first aluminum alloy junction member (11a) and two aluminum alloy materials of the second aluminum alloy junction member (11b), and the both sides of each structural member all have 3 pilot holes respectively;
The first right angle lead foot (12a) and the second right angle lead foot (12b) are formed by the low-carbon steel material of two high magnetic permeabilities;
The first magnetic conduction boots (13a) and the second magnetic conduction boots (13b) are also processed by low-carbon steel material;
Excitation source (14) is fixed in the clamping device of being made up of the first aluminum alloy junction member (11a) and the second aluminum alloy junction member (11b); Be respectively charged into the first right angle lead foot (12a) and the second right angle lead foot (12b) of low-carbon steel material at the two ends of clamping device; Excitation source (14), the first right angle lead foot (12a) and the second right angle lead foot (12b) are fixed up with screw through the pilot hole on the first aluminum alloy junction member (11a) and the second aluminum alloy junction member (11b), the first magnetic conduction boots (13a) are fixed on that the first right angle lead foot (12a) is gone up, the second magnetic conduction boots (13b) are fixed on the second right angle lead foot (12b) through screw;
Signal receives processing in advance and power amplifier module (2) comprises pre-amplification circuit (21), amplifying circuit (22), power amplification circuit (23), modulation signal input port (24), preposition preparatory amplifying signal output port (25);
Signal Processing and modulation module (3) comprise main signal amplifying circuit (31), sample circuit (32), field programmable gate array (33); Master controller (34); Signal modulation circuit (35), modulation signal output port (36), preposition preparatory amplifying signal input port (37);
Signal receives in advance to be handled and power amplifier module (2) and signal Processing and modulation module (3) are fixed on the positioning stud of instrument mounting box (51) housing bottom with screw respectively, and amplifying circuit (22) links to each other with preposition preparatory amplifying signal input port (37) through preposition preparatory amplifying signal output port (25) with main signal amplifying circuit (31); Signal modulation circuit (35) links to each other with modulation signal input port (24) through modulation signal output port (36) with power amplification circuit (23); The output signal of power amplification circuit (23) directly links to each other with the instrument connectivity port (53a) that transmits through lead, and instrument reception signal connection end mouth (53b) passes through lead and directly links to each other with the input of pre-amplification circuit (21);
Probe adapter (4) comprises the connectivity port (41a) that transmits of popping one's head in, probe received signal connectivity port (41b), transmitting probe connectivity port (42a), receiving transducer connectivity port (42b), transmitting probe (43a), receiving transducer (43b);
Transmitting probe (43a) and receiving transducer (43b) are connected on transmitting probe connectivity port (42a) and receiving transducer connectivity port (42b), and transmitting probe connectivity port (42a), receiving transducer connectivity port (42b) directly link to each other with transmit connectivity port (41a), probe received signal connectivity port (41b) of probe respectively on circuit board.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012101421935A CN102645487A (en) | 2012-05-09 | 2012-05-09 | Electromagnetic ultrasonic guided wave device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012101421935A CN102645487A (en) | 2012-05-09 | 2012-05-09 | Electromagnetic ultrasonic guided wave device |
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| CN102645487A true CN102645487A (en) | 2012-08-22 |
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| CN1584582A (en) * | 2004-06-03 | 2005-02-23 | 上海交通大学 | Electromagnetic guided wave detector and method for sea platform structure defect |
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| CN101852775A (en) * | 2010-06-08 | 2010-10-06 | 浙江大学 | Device for regulating magnetostrictive detection of longitudinal static magnetic field |
| CN201897564U (en) * | 2010-12-05 | 2011-07-13 | 郑丽群 | Metallic corrosion rate detection device |
| CN202583128U (en) * | 2012-05-09 | 2012-12-05 | 武汉中科创新技术股份有限公司 | Electromagnetic ultrasonic guided wave device |
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2012
- 2012-05-09 CN CN2012101421935A patent/CN102645487A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3877159B2 (en) * | 2002-11-27 | 2007-02-07 | 住友金属工業株式会社 | Electromagnetic ultrasonic probe |
| CN1584582A (en) * | 2004-06-03 | 2005-02-23 | 上海交通大学 | Electromagnetic guided wave detector and method for sea platform structure defect |
| CN101701937A (en) * | 2009-11-09 | 2010-05-05 | 哈尔滨工程大学 | Ultrasonic nondestructive test method and test device |
| CN101852775A (en) * | 2010-06-08 | 2010-10-06 | 浙江大学 | Device for regulating magnetostrictive detection of longitudinal static magnetic field |
| CN201897564U (en) * | 2010-12-05 | 2011-07-13 | 郑丽群 | Metallic corrosion rate detection device |
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| 张慧: "基于PFGA的高精度超声波液体流量计研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
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Application publication date: 20120822 |