CN102788844B - Automatically ultrasonic detection system for automatically correcting crack of bend pipe - Google Patents
Automatically ultrasonic detection system for automatically correcting crack of bend pipe Download PDFInfo
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- CN102788844B CN102788844B CN201210132486.5A CN201210132486A CN102788844B CN 102788844 B CN102788844 B CN 102788844B CN 201210132486 A CN201210132486 A CN 201210132486A CN 102788844 B CN102788844 B CN 102788844B
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Abstract
The invention discloses an automatically ultrasonic detection system for an automatically correcting crack of a bend pipe, which belongs to the steel roasted elbow crack detection technical field. The system comprises an industrial control computer, an ultrasonic gatherer, a multiple shafts controller, a TOFD probe, a transversal probe, a direct current servo motor, a position encoder, an error correcting encoder and direct current power supply; the industrial control computer is connected with the ultrasonic gatherer through an USB data line, the ultrasonic gatherer is respectively connected to the TOFD probe and the transversal probe through the coaxial cables, the industrial control computer is connected with the multiple shafts controller through a netting twine, the multiple shafts controller is connected to the direct current servo motor and the error correcting encoder which are connected with the position encoder, and the direct current power supply is respectively connected to the ultrasonic gatherer, the multiple shafts controller, the direct current servo motor, the position encoder and the error correcting. The automatically ultrasonic detection system has the advantages of compact structure and convenient installation, and can be widely used in the detection construction of the steel roasted elbow crack.
Description
Technical field
The present invention relates to hot-bending bends crack detection technical field, particularly a kind of automatic deviation correction bend pipe crackle automatic ultrasonic detection system.
Background technology
At present, in long-distance oil & gas pipeline construction, use hot-bending bends in a large number, and Uniform provisions is not had to the crack detection of hot-bending bends, make multiple ultrasonic detecting technology and digital radial detection technique and deposit.According to domestic relevant criterion requirement, within the scope of hot-bending bends pipe end 500mm, all need to carry out omnidirectional ultrasonic crack detection, guarantee that hot-bending bends is bending in process and can not produce crackle.The detection of current domestic hot-bending bends all adopts manual ultrasonic A to sweep detector, this detection method exists following not enough: because the directivity of ultrasonic detecting technology is very strong, therefore the detection for a hot-bending bends needs several technician to carry out repeatedly multi-faceted scanning, wastes time and energy; In addition, ultrasonic A sweeps that the focusing of detector is poor, resolution is low, and crack detection rate is low, and crackle location is inaccurate, poor reliability.
Summary of the invention
Waste time and energy to solve existing hot-bending bends crack detection, the problems such as crack detection rate low and crackle location is inaccurate, the invention provides a kind of automatic deviation correction bend pipe crackle automatic ultrasonic detection system, described system comprises industrial computer, ultrasound acquisition device, multi-axis controller, TOFD probe, transversal sonde, DC servo motor, position coder, correcting coding device and direct supply; Described industrial computer is connected by USB data line with ultrasound acquisition device, described ultrasound acquisition device is popped one's head in described TOFD respectively by concentric cable and is connected with transversal sonde, described industrial computer is connected by netting twine with multi-axis controller, described multi-axis controller is connected with the DC servo motor and correcting coding device being connected with position coder, and described direct supply is connected with ultrasound acquisition device, multi-axis controller, DC servo motor, position coder and correcting coding device respectively; Described correcting coding device is positioned on magnetic stripe, the correcting coding device on magnetic stripe be fixed to TOFD and transversal sonde are housed scanner on; Scanner carries out circumferential scanning along magnetic stripe track to bend pipe under the driving of described DC servo motor, when due to week to left and right DC servo motor velocity error produce direct of travel skew time, described correcting coding device feeds back to described multi-axis controller in time deflection error, jointly completes automatic deviation rectifying function by described multi-axis controller, industrial computer and the correction program of writing.
Described ultrasound acquisition device comprises usb circuit, FPGA circuit, ultrasonic signal emission circuit, analog signal input circuit and A/D D/A converting circuit; Described usb circuit is connected with FPGA circuit, described FPGA circuit is connected with ultrasonic signal emission circuit, described ultrasonic signal emission circuit is connected with analog signal input circuit, described analog signal input circuit is connected with A/D D/A converting circuit, and described A/D D/A converting circuit is connected with FPGA circuit.
Automatic deviation correction bend pipe crackle automatic ultrasonic detection system provided by the invention, by the combination of magnetic stripe automatic deviation correction control technology and automatic ultrasonic detection technique, the defect that can detect trend arbitrarily in hot-bending bends and the crackle extended to surface, automaticity is high, compact conformation, easy to install, have and can store and detect the advantages such as fast to each, testing result high to crack detection rate.
Accompanying drawing explanation
Fig. 1 is the theory structure schematic diagram of the automatic deviation correction bend pipe crackle automatic ultrasonic detection system that the embodiment of the present invention provides;
Fig. 2 is the electrical connection schematic diagram of the automatic deviation correction bend pipe crackle automatic ultrasonic detection system that the embodiment of the present invention provides;
Fig. 3 is the electrical connection schematic diagram between embodiment of the present invention multi-axis controller and position coder, correcting coding device;
Fig. 4 is the circuit diagram of embodiment of the present invention FPGA interface circuit;
Fig. 5 is the connection diagram of embodiment of the present invention usb circuit and FPGA circuit;
Fig. 6 is the circuit diagram of embodiment of the present invention ultrasonic signal emission circuit;
Fig. 7 is the circuit diagram of embodiment of the present invention analog signal input circuit;
Fig. 8 is the circuit diagram of embodiment of the present invention A/D D/A converting circuit;
Fig. 9 is the peripheral circuit of embodiment of the present invention FPGA circuit and USB interface.
Embodiment
In order to understand the present invention in depth, below in conjunction with drawings and the specific embodiments, the present invention is described in detail.
The automatic deviation correction bend pipe crackle automatic ultrasonic detection system that the embodiment of the present invention provides, by the combination of magnetic stripe automatic deviation correction control technology and automatic ultrasonic detection technique, the defect that can detect trend arbitrarily in hot-bending bends and the crackle extended to surface, automaticity is high, easy to use, have and can store and detect the advantages such as fast to each, testing result high to crack detection rate; By magnetic stripe automatic deviation correction control technology, the hot-bending bends that can be applicable to various caliber easily detects, and by two-dimentional servo scanning, can cover whole region to be checked, for hot-bending bends crack detection provides brand-new solution.
See Fig. 1, embodiments provide a kind of automatic deviation correction bend pipe crackle automatic ultrasonic detection system, this system comprises industrial computer, ultrasound acquisition device, multi-axis controller, TOFD probe, transversal sonde, DC servo motor, position coder, correcting coding device and direct supply; Wherein, industrial computer is connected by USB data line with ultrasound acquisition device, ultrasound acquisition device is popped one's head in TOFD respectively by concentric cable and is connected with transversal sonde, industrial computer is connected by RJ45 netting twine with multi-axis controller, multi-axis controller is connected with the DC servo motor and correcting coding device being connected with position coder, and direct supply is connected with ultrasound acquisition device, multi-axis controller, DC servo motor, position coder and correcting coding device respectively.As shown in Figure 1, DC servo motor that DC servo motor comprises axial DC servomotor, week turns left DC servo motor and week turns right, turn left with axial DC servomotor, week respectively DC servo motor and DC servo motor of turning right in week of multi-axis controller is connected; Position coder comprises axial direction electric machine scrambler, week turns left motor encoder and circumferential right-hand machine scrambler, and turn left with axial direction electric machine scrambler, week respectively motor encoder and circumferential right-hand machine scrambler of multi-axis controller is connected.
In actual applications, the USB interface of industrial computer is connected with the communication interface of ultrasound acquisition device; Ultrasound acquisition device, by the control word of the USB interface reception program software transmission of industrial computer, controls the transmitting of ultrasonic signal and receiving course according to the control word received, and the ultrasonic signal received is transferred to industrial computer with the form of packet; It is two right that detection probe for detecting hot-bending bends crackle has: a pair TOFD probe and a pair transversal sonde, and all adopt one one receipts working method, i.e. a TOFD transmitting probe and TOFD receiving transducer, a horizontal transmitting probe and a horizontal receiving transducer; Wherein, TOFD probe is used for the automatic detection of hot-bending bends underbead crack, shows the X axis of bend pipe underbead crack, Y-axis and degree of depth three-dimensional coordinate in real time by inspection software prepared in advance; Transversal sonde is used for scanning hot-bending bends surface crack.Transversal sonde, to the detection of bend pipe surface crack, solves the surface blind region that TOFD detection technique exists, the technical barrier that effects on surface defect is easily undetected, thus can detect the cracks that hot-bending bends is inner and surperficial more exactly.
In the practical application of the present embodiment automatic deviation correction bend pipe crackle automatic ultrasonic detection system, computing machine has controlled the automatic location of probe scanning device at bend pipe circumferential and axial, the network interface of industrial computer connects the communication interface of multi-axis controller by RJ45 netting twine, multi-axis controller controls 3 DC servo motor, DC servo motor of turning right in DC servo motor of turning left in week and week detects dolly along bend pipe circumferential movement for driving, after completing circumferential scanning, the axial DC servomotor be arranged on scanner drives probe holder by presetting the annular scanning interval of stepping vertically, repeat above testing process, the defect scanning in hot-bending bends pipe end region can be completed, ultrasound acquisition device real-time reception also processes the signal of popping one's head in and passing back simultaneously, on imaging software, display comprises the testing result of defect information, for passing judgment on hot-bending bends quality.
In the practical application of the present embodiment automatic deviation correction bend pipe crackle automatic ultrasonic detection system, the pulse signal utilizing the skew of correcting coding device on magnetic stripe to produce carries out the running orbit counting automatic deviation correction DC servo motor.The hot-bending bends that this automatic deviation correction mode can adapt to difformity and different tube diameters detects, and substitutes the detection track of various fixed circumference.Specific implementation process is: along bend pipe circumference lay the soft magnetic stripe that width is 1cm, the correcting coding device on magnetic stripe be fixed to TOFD and transversal sonde are housed scanner on, its output signal is connected on multi-axis controller; Scanner carries out circumferential scanning along magnetic stripe track to bend pipe under the driving of DC servo motor, when due to week to left and right DC servo motor velocity error produce direct of travel skew time, correcting coding device feeds back to multi-axis controller in time deflection error, jointly complete automatic deviation rectifying function by multi-axis controller, industrial computer and the correction program of writing, ensure the accuracy of scanning and defect record.
In concrete production practices, industrial computer in the present embodiment automatic deviation correction bend pipe crackle automatic ultrasonic detection system is optional grinds auspicious industrial computer JPC-1504 series products, TOFD pops one's head in optional C563-SM series products, the optional PRI7.5 series products of transversal sonde, the optional DMC-2143 series products of multi-axis controller, the optional MaxonRE40 series products of DC servo motor, the optional HEDL55 series products of motor position encoder, the optional SCA34-2000-D series products of correcting coding device, as shown in Figure 2.Fig. 3 shows DMC-2143 series products and MaxonRE40 series products, electrical connection schematic diagram between HEDL55 series products and SCA34-2000-D series products.
In concrete production practices, ultrasound acquisition device is made up of usb circuit (as shown in Figure 9), FPGA circuit, ultrasonic signal emission circuit (as shown in Figure 6), analog signal input circuit (as shown in Figure 7) and A/D D/A converting circuit (as shown in Figure 8).Wherein, usb circuit is connected with FPGA circuit, and FPGA circuit is connected with ultrasonic signal emission circuit, and ultrasonic signal emission circuit is connected with analog signal input circuit, analog signal input circuit is connected with A/D D/A converting circuit, and A/D D/A converting circuit is connected with FPGA circuit.The digital signal that FPGA circuit exports for receiving A/D D/A converting circuit, and digital signal is processed; In actual applications, FPGA circuit is made up of fpga chip, and fpga chip can adopt the EP2S30F672C3 chip of Altra Stratix II series, and the present embodiment have employed two EP2S30F672C3 chips.Analog signal input circuit, A/D D/A converting circuit and FPGA circuit well known to a person skilled in the art typical application circuit, and the application circuit provided in the present embodiment only for illustration of realizability of the present invention, is not limited to the present invention.Ultrasonic signal emission circuit is embodiment of the present invention control panel newly developed, its circuit structure as shown in Figure 6, the principle of work of this radiating circuit is: transponder pulse signal SEND1 and SEND2 (see Fig. 4) that FPGA circuit exports controls driving chip MAX4420, negative pulse ultrasonic excitation signal OUT1 and OUT2 is produced by MAX4420 and MOS driving tube Q1, Q2, be sent to TOFD transmitting probe and horizontal transmitting probe respectively, emitting voltage can reach-200VDC, and transmitted pulse width regulates by transponder pulse signal SEND1 and SEND2 exported by FPGA that programme.
Simulating signal IN1, the IN2 of TOFD receiving transducer and horizontal receiving transducer collection enter analog signal input circuit (see Fig. 7), amplified by high input impedance operational amplifier AD820, then convert differential signal ADVINAN, ADVINAP and ADVINBN, ADVINBP to through single-ended transfer difference chip AD8138; Four road differential signals enter A/D D/A converting circuit (see Fig. 8), convert digital signal ADBUF [23,0] to, be sent to FPGA interface circuit (see Fig. 4) through ADC chip AD9238BST-40.A magnetic bead is adopted to isolate between digital power and analog power.
Fig. 5 is the connection diagram of usb circuit and FPGA circuit, and Fig. 9 is the peripheral circuit of FPGA circuit and USB interface, have employed BAK1 and BAK2 of FPGA, and interface power is 3.3V.Data line FD [15:0] FD [7:0] be bidirectional data line, by USB firmware program select be 8 or 16 position datawires; RDY0/SLRD signal wire is used for FPGA carries out read operation enable signal to end points, is set to negative edge effective; RDY1/SLWR is used for FPGA carries out write operation enable signal to end points, is set to negative edge effective; CTL0/FLAGA pin, CTL0 is that GPIF controls to export, and FLAGA is subordinate FIFO output state marking signal able to programme; CTL1/FLAGB and CTL1/FLAGC is the empty full scale will of end points FIFO, and FLAGB represents " expiring ", and FLAGC represents " sky "; PA0/INT0# pin, PA0 is two-way I/O mouth, and INT0# is the INT0 interrupting input signal of 8051; PA1/INT1# pin, PA1 is two-way I/O mouth pin, and INT1# is the INT1 interrupting input signal of 8051; PA2/SLOE pin, PA2 two-way I/O mouth pin, SLOE provides FD input, output enable signal; PA3/WU2 pin, PA3 is two-way I/O mouth pin, and WU2 is that USB wakes alternative source up; End points option interface PA4/FIFOADR0 and PA5/FIFOADR1, for selecting the reception data terminal dot buffer zone be connected with FD; PA6/PKTEND pin, PA6 is two-way I/O mouth pin, and PKTEND is able to programme, for being connected to the subordinate FIFO of FD [15:0]; PA7/SLCS# pin, PA7 is two-way I/O pin, SLCS# for control every other subordinate FIFO enable/gating; WAKEUP pin is used for USB and wakes up; SCL pin is I2C bus interface clock; SDA pin is I2C bus interface; IFCLK pin is interface clock, for the synchronous clock of the input of subordinate data fifo, output; CLKOUT pin is 12MHz, 24MHz or 48MHz clock, and PGC demodulation is at 24MHz input clock; RST# pin high level is effective, and can reset whole chip; XTALIN and XTALOUT is crystal input and output.
Fpga chip is connected with the RS232 port of industrial computer by RS232 interface chip CY7C68013A-56PVXC, and USB chip adopts CY7C68013A-56PVXC, the transceiver of integration USB 2.0 and a 8051CPU.After computing machine sends acquisition, the digital signal after the conversion of fpga chip high speed acquisition A/D chip, and by port D+, D-of USB chip CY7C68013A-56PVXC, the data of collection are sent to computing machine, carry out data analysis and display by computing machine.The USB interface download configuration of configuration by designing of fpga chip.
The automatic deviation correction bend pipe crackle automatic ultrasonic detection system that the present embodiment provides, solves the undetected and pinpoint technical barrier of irregular bend pipe crack detection in TOFD technical face blind area, for hot-bending bends crack detection provides brand-new scheme.
The automatic deviation correction bend pipe crackle automatic ultrasonic detection system that the present embodiment provides, can realize detecting in real time and Electronic saving hot-bending bends, have conventional Ultrasound imaging and TOFD measuring ability; Can conveniently by man-machine interface arrange bend pipe crackle automatic ultrasonic detection scheme, pick-up unit travelling speed and accurately locate, by ultrasound acquisition device and DC servo motor, realize detecting the fully-automatic ultrasonic of heavy wall hot-bending bends pipe workpiece quality, meet hot-bending bends and produce, recall rate high-technology demand fast to quality tips testing requirement speed.
The automatic deviation correction bend pipe crackle automatic ultrasonic detection system that the present embodiment provides, achieves the robotization that the bend pipe quality of production detects.Proved by working-yard industrial performance test, automatic deviation correction bend pipe crackle automatic ultrasonic detection system is applied in hot-bending bends crack detection, meets coherent detection standard-required, defect location is accurate, resolution is high, construction safety is reliable.
Above-described embodiment; object of the present invention, technical scheme and beneficial effect are further described; be understood that; the foregoing is only the specific embodiment of the present invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (2)
1. an automatic deviation correction bend pipe crackle automatic ultrasonic detection system, it is characterized in that, described system comprises industrial computer, ultrasound acquisition device, multi-axis controller, TOFD probe, transversal sonde, DC servo motor, position coder, correcting coding device and direct supply; Described industrial computer is connected by USB data line with ultrasound acquisition device, described ultrasound acquisition device is popped one's head in described TOFD respectively by concentric cable and is connected with transversal sonde, described industrial computer is connected by netting twine with multi-axis controller, described multi-axis controller is connected with the DC servo motor and correcting coding device being connected with position coder, and described direct supply is connected with ultrasound acquisition device, multi-axis controller, DC servo motor, position coder and correcting coding device respectively; Described correcting coding device is positioned on magnetic stripe, the correcting coding device on magnetic stripe be fixed to TOFD and transversal sonde are housed scanner on; Scanner carries out circumferential scanning along magnetic stripe track to bend pipe under the driving of described DC servo motor, when due to week to left and right DC servo motor velocity error produce direct of travel skew time, described correcting coding device feeds back to described multi-axis controller in time deflection error, jointly completes automatic deviation rectifying function by described multi-axis controller, industrial computer and the correction program of writing.
2. automatic deviation correction bend pipe crackle automatic ultrasonic detection system as claimed in claim 1, it is characterized in that, described ultrasound acquisition device comprises usb circuit, FPGA circuit, ultrasonic signal emission circuit, analog signal input circuit and A/D D/A converting circuit; Described usb circuit is connected with FPGA circuit, described FPGA circuit is connected with ultrasonic signal emission circuit, described ultrasonic signal emission circuit is connected with analog signal input circuit, described analog signal input circuit is connected with A/D D/A converting circuit, and described A/D D/A converting circuit is connected with FPGA circuit.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103048386A (en) * | 2012-12-25 | 2013-04-17 | 中国石油天然气集团公司 | Wireless ultrasonic detection system for bent-pipe cracks |
| RU2597676C2 (en) * | 2015-05-15 | 2016-09-20 | Общество с ограниченной ответственностью "Газпром трансгаз Казань" | Method for ultrasonic inspection of material of component part |
| CN111595274B (en) * | 2019-02-21 | 2022-03-18 | 宝山钢铁股份有限公司 | Testing device and testing method for rapidly detecting depth of full circumferential cracks at bottom of V-shaped groove of profile steel roller |
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| JPS6252455A (en) * | 1985-09-02 | 1987-03-07 | Toshiba Corp | Method and apparatus for ultrasonic flaw detection |
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| US6925882B1 (en) * | 2001-10-05 | 2005-08-09 | Marvin F. Fleming | Methods for ultrasonic inspection of spot and seam resistance welds in metallic sheets |
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Effective date of registration: 20170302 Address after: 100007 Dongcheng District, Dongzhimen, China, North Street, No. 9 Oil Mansion, No. Patentee after: China National Petroleum Corporation Patentee after: China Petroleum Pipeline Bureau Engineering Co., Ltd. Address before: 100007 Dongcheng District, Dongzhimen, China, North Street, No. 9 Oil Mansion, No. Patentee before: China National Petroleum Corporation Patentee before: China Petroleum and Natural Gas Pipeline Bureau |