CN105486752A - Gas storage well shaft detection system based on ultrasonic phased array technology and detection method thereof - Google Patents
Gas storage well shaft detection system based on ultrasonic phased array technology and detection method thereof Download PDFInfo
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- CN105486752A CN105486752A CN201610057375.0A CN201610057375A CN105486752A CN 105486752 A CN105486752 A CN 105486752A CN 201610057375 A CN201610057375 A CN 201610057375A CN 105486752 A CN105486752 A CN 105486752A
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The invention discloses a gas storage well shaft detection system based on an ultrasonic phased array technology and a detection method thereof. The system comprises surface equipment such as a system host, optical fiber communication equipment and an encoder as well as underground equipment such as a centering device, an ultrasonic phased array detector and an annular phased array probe. The detection method includes the steps that the system host is started, and the centering device is adjusted to keep the underground equipment in coaxial parallel with a shaft; electric signals, for detecting control information, of the system are converted into optical signals through an optical transceiver and are transmitted to the ultrasonic phased array detector through optical fiber; the annular phased array probe is stimulated by the ultrasonic phased array detector according to the focusing law to transmit ultrasonic waves to scan the shaft wall; after being converted into optical signals, collected echo electric signals are transmitted to the system host through optical fiber to be stored and processed into images. Real-time S display and C display can be achieved by the detection system, the scanning coverage rate can be flexibly adjusted by changing the stepping magnitude of an ultrasonic deflecting angle, a corroded part is located and scanned carefully, and detection speed and detection precision are high.
Description
Technical field
The invention belongs to nondestructiving inspecting equipment technical field, relate to the nondestructive testing technique detected for the wall thickness measuring of the compression gas storage well of the facilities such as natural gas filling station, peak regulation station and gasholder station and borehole wall pit, crackle etc., especially relate to a kind of gas storage well bore detection system based on ultrasonic phased array technology and detection method thereof.
Background technology
Compressed natural gas (CNG) gas storage well, due to the advantage such as security performance is high, floor area is little and construction cost is low, becomes the basic gas storage mode of current domestic CNG gas station.First underground gas storage well group is built up in Sichuan from mining area of southwest China, CNPC river in 1997, China is existing 8000 mouthfuls of gas storage wells so far, wherein part enters the senility, because the existence of local water and the low amounts of rock gas itself cause the borehole wall to corrode containing sulphur property, there is blast, reveal and Jing Cuandeng accident potential.In order to ensure the safe operation of gas storage well, protection the people's lives and property safety, China national quality supervision department includes gas storage well in special equipment category, its design, manufacture, use, inspection and maintenance and renovation is carried out to the safety monitor of overall process.
At present, the gas storage borehole wall detects and mainly contains two kinds of modes, and one is manual detection, and namely hand-held thicknessmeter carries out pointwise detection; Another kind is automatic detection, namely relies on mechanical hook-up and control system automatically to complete.Can reach the gas storage well of 300 meters for the degree of depth, manual detection is undoubtedly an onerous toil operation; Meanwhile, detecting data need first store, and reprocessing after end to be detected, so manual detection does not have real-time.Automatic detection again more is divided into uphole equipment and underground equipment, and underground equipment is the direct executor detected, and uphole equipment then controls the working method of underground equipment; The accurate positioning requirements checkout equipment of the communication of two parts equipment room and underground part keeps static as much as possible in testing process, need fix a whole set of pick-up unit, causes this detection mode relative complex.
In many automatic testing methods, ultrasound examination because penetrability is strong, good directionality and sensitivity high replace the methods such as resistance detection method, capacitance detecting method, ray detection method, detection method of eddy gradually.It is interior Rotary Inspection System (IRIS) that existing ultrasonic detection technology mainly adopts, and is divided into three kinds of detection modes such as rotation of singly popping one's head in, the rotation of single probe acoustic beam and multilayer list probe annular array.Single probe rotates detection and refers to that probe is axially perpendicular to the borehole wall 360 ° of rotation sweeps; Single probe acoustic beam rotates detection and refers to that probe is axially parallel to the borehole wall, and 45 ° of catoptrons, 360 ° of rotations of tilting complete scanning; These two kinds of detection modes require high to the inwall of pit shaft, and the common shaft deformation of gas storage well can cause probe defective coupling, pick-up unit in phenomenons such as pipe Nei Kadun, detection signal loss, and scanning coverage rate is low, causes certain detection leakage phenomenon.Multilayer list probe annular array detects and refers to every layer of even ring shooting of probe, and interlayer Probe arrangement staggers certain angle, can scan by incentive probe successively; Compare above-mentioned two kinds of detection modes, the scanning blind area of this detection is less, but the use of multiple single probe adds the volume of proving installation, and between Multi probe, the inconsistency of electrical property can bring metrical error, and preoperative adjustment is more difficult; Between Multi probe emission angle difference, assemble not in place, all can reduce the scanning coverage rate of gas storage well bore.
Chinese patent application CN21010115676.7 discloses a kind of gas storage well bore wall thickness and corrosion detection system and detection method, employing be above-mentioned multilayer list probe annular array detection method.This patented claim is at circumferential directions multi-layer annular immersion probe array, detection system staggers certain angle to increase covering measurement range by interlayer, the sound wave that interlayer difference probe receives needs calibration, and underground equipment limits by interfloor distance shift position in vertical direction, there is complex structure, survey the defect that front adjustment is difficult, scanning coverage rate is low, metrical error is large.
Summary of the invention
The object of the invention is to the defect overcoming above-mentioned prior art, provide a kind of gas storage well bore detection system based on ultrasonic phased array technology and detection method thereof, system detecting device structure is simple, before surveying, adjustment is convenient, scanning coverage rate is high and can adjust neatly in real time, can go through erodable section location, detection speed is fast, and accuracy of detection is high.
For solving the problems of the technologies described above, the present invention by the following technical solutions.
A kind of gas storage well bore detection system based on ultrasonic phased array technology of the present invention, comprise uphole equipment, underground equipment and composite cable, described uphole equipment comprises system host, control box, take-up stand, fixed pulley; Described fixed pulley is provided with scrambler; Underground equipment comprises centralizer, detector and annular probe; Described composite cable is made up of internal copper wire, optical fiber and cover wire; Copper conductor is that underground equipment is powered, and steel wire pulls underground equipment work, and optical fiber is the medium of communication of system host and underground equipment, it is characterized in that:
Described detector is ultrasonic phase array detector, comprises time delay module, isolation module, transmitter module, receiver module, capture card and optical transmitter and receiver; Described transmitter module, receiver module form the transmission circuit of ultrasonic phase array detector;
Described underground equipment is provided with the annular probe described in; Described annular probe is H-Horn APA system array probe, containing being evenly distributed on together layer multiple H-Horn APA system array element group circumferentially; Described each H-Horn APA system array element group has 16n array element;
When carrying out gas storage well bore and detecting, described system host calculates each group of array element relative time delay time of H-Horn APA system array probe according to the ultrasound beamformer deflection angle that the transmitter module of described ultrasonic phase array detector sends, and passes to the receiver module of ultrasonic phase array detector; The time delay module of described ultrasonic phase array detector realizes the relative time delay amount of each group of array element, each array element of H-Horn APA system array probe described in transmitter module excitation launches ultrasound wave, in isolation module protection late-class circuit, voltage devices is not damaged, receiver module converts the echoed signal that H-Horn APA system array probe receives the input signal of capture card to, capture card converts the electrical signal to digital electric signal, and digital electric signal is converted to light signal and sends system host to through optical fiber by optical transmitter and receiver; The echoed signal received is carried out the process such as filtering, amplification by described system host, to extract useful signal for analysis, imaging.
Described ultrasonic phase array detector transmission circuit adopts array design, has the multiplexer channel that structure is identical, each paths can independent drive, reception and conditioning ultrasonic signal, do not interfere with each other.
The port number of each functional module of described ultrasonic phase array detector is equal to single group H-Horn APA system array element number; The modules of multiplexed ultrasonic phased array detector during multiple H-Horn APA system array element component.
Described H-Horn APA system array probe includes four H-Horn APA system array element groups, and each H-Horn APA system array element group has 16 array elements.
Described underground equipment comprises two centralizers.
Described centralizer is provided with three and is spaced apart 120 ° of bar linkage structure formula legs, can along borehole wall touch scrolling, can synchronously folding and unfolding.
A kind of gas storage well bore detection method based on ultrasonic phased array technology of the present invention, its detection system comprises uphole equipment, underground equipment and composite cable, and described uphole equipment comprises system host, control box, take-up stand, fixed pulley; Described fixed pulley is provided with scrambler; Underground equipment comprises centralizer, detector and annular probe; Described composite cable is made up of internal copper wire, optical fiber and cover wire; Copper conductor is that underground equipment is powered, and steel wire pulls underground equipment work, and optical fiber is the medium of communication of system host and underground equipment, it is characterized in that:
Described detector is ultrasonic phase array detector, comprises time delay module, isolation module, transmitter module, receiver module, capture card and optical transmitter and receiver; Described transmitter module, receiver module form the transmission circuit of ultrasonic phase array detector;
Described annular probe is H-Horn APA system array probe, and comprise and be evenly distributed on together layer multiple H-Horn APA system array element group circumferentially, each array element group is made up of 16n array element;
Described detection method comprises the following steps:
Fill clear water in step 1, gas storage well, fixed pulley, scrambler are installed, build the communication system of scrambler, control box, ultrasonic phased array inspection instrument three and system host with composite cable, and underground equipment is sealed;
Step 2, start up system main frame, place underground equipment in well, synchronization encoders data, location underground equipment, and adjustment centralizer contacts with the borehole wall, to keep H-Horn APA system array probe and pit shaft coaxially parallel;
Step 3, adjust well divide into initial detecting position to the utmost, start ultrasonic phase array detector, control underground equipment and at the uniform velocity move up or down, start scanning work with control box;
Step 4, system host calculate each array element relative time delay time of H-Horn APA system array probe according to ultrasound beamformer deflection angle, and pass to ultrasonic phase array detector; The time delay module of ultrasonic phase array detector realizes the relative time delay amount of each array element of H-Horn APA system array probe, each array element of H-Horn APA system array probe described in transmitter module excitation launches ultrasound wave, in isolation module protection late-class circuit, voltage devices is not damaged, receiving circuit converts the echo that H-Horn APA system array probe receives the input signal of capture card to, capture card converts the electrical signal to digital electric signal, and digital electric signal is converted to light signal and sends system host to through optical fiber by optical transmitter and receiver; The array element scanning successively of many groups H-Horn APA system array element group, single group H-Horn APA system array element is launched the deflection ultrasound beamformer scanning borehole wall according to focusing rule and receives echoed signal, and reception data are converted to light signal through optical transmitter and receiver, send system host to through optical fiber;
Step 5, system host process underground equipment positional information and echo data, and demonstrate well bore wall thickness and the corrosion condition of relevant position; Then the data image that stored record is relevant;
Step 6, judge to detect and whether complete, if complete, then arrange detection of end after all checkout equipments; If do not complete, then system host controls underground equipment and moves to next scanning position, repeating said steps 3 to step 6.
The port number of the described each module of ultrasonic phase array detector equals the list group H-Horn APA system array element number of described H-Horn APA system array probe, when detecting, and the modules of many group H-Horn APA system array element time-sharing multiplex ultrasonic phase array detectors.
The single scanning line that described H-Horn APA system array probe produces when carrying out scanning is synthesized by all H-Horn APA system array element groups reception ultrasonic echo compensation of delay of described H-Horn APA system array probe, acoustic beam to obtain; Described single scanning is A scanning.
In described step 5, detection system can to show and gas storage well erects imaging of interface C and shows by real-time implementation gas storage well xsect imaging S.
Compared to existing technology, the present invention includes following advantage and beneficial effect:
1. the present invention adopts single H-Horn APA system array probe to detect, and multilayer arrangement when neither needing whirligig during picture single probe wheel measuring also not need multilayer list probe annular array to measure, overcomes the technological deficiency that two kinds of detection modes are brought.Because there is not the water flow phenomenon that rotating mechanism causes, the ultrasound wave of systems radiate all can not be affected in water transmission approach and speed, fundamentally eliminates the metrical error because current cause.And compare multi-layer annular probe, present invention saves probe and take up room, working service is convenient, scanning coverage rate and detection sensitivity high.
2., compared with single probe scanning imaging, phased array array probe scanning imaging resolution of the present invention is high, then the accuracy of detection of detection system is high.Single scanning line (A scanning) probe all array element receptions ultrasonic echo compensation of delay of phased array array probe, acoustic beam synthesis obtain, and the single scanning line of singly popping one's head in is only the ultrasonic echo that probe receives; And phased array array probe focused radius adjusts in real time, ensure the high precision test of different gas storage well, and the focused radius of singly popping one's head in is constant.
3. the present invention can complete all detections under the same degree of depth in the same horizontal line, and without the need to the sound wave calibration in vertical direction, and total system does not limit by vertical detection resolution.
4. to launch the step size of ultrasound wave deflection angle adjustable for phased array probe of the present invention, and the scanning coverage rate of ultrasonic phase array detector is high and can adjust neatly.The scanning result of the borehole wall can be shown according to detection system in real time, reduce deflection angle stepping in real time, improve scanning coverage rate, can, so that more the high measurement accuracy location scanning borehole wall is a part of, realize taking into account precision while guarantee detection speed.
5. between two groups of H-Horn APA system array element groups, be spaced apart array element interval, then many group probes may be combined with into an annulus phased array probe.Ultrasonic phase array detector can adopt electronic scanning mode to receive and dispatch ultrasound wave and complete borehole wall detection, sound wave deflection need not can complete 360 ° of detections, the deflection ultrasound wave that present system is launched relative to probe reduces side lobe effect, improves imaging resolution further.
6. present system adopts ultrasonic phased array technology, ultrasonic phased array technology can show and C display by S in real time, and scanning coverage rate can be adjusted flexibly by the step size changing ultrasound wave deflection angle, erodable section location is gone through, when ensureing detection speed, takes into account accuracy of detection.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a kind of embodiment of present system.
Fig. 2 is the process flow diagram of a kind of embodiment of the inventive method.
Fig. 3 is the centralizer side view of a kind of embodiment of the present invention.
Fig. 4 is the centralizer vertical view of a kind of embodiment of the present invention.
Fig. 5 is the high-level schematic functional block diagram of the ultrasonic phase array detection system of a kind of embodiment of the present invention.
Fig. 6 is the ultrasonic phase array detector transmission circuit entire block diagram of a kind of embodiment of the present invention.
Fig. 7 is the H-Horn APA system array probe structural representation of a kind of embodiment of the present invention.
Fig. 8 is the H-Horn APA system array probe scanning schematic diagram of a kind of embodiment of the present invention.
Fig. 9 is the gas storage well xsect imaging S display figure of a kind of embodiment of the present invention.
Figure 10 is that the gas storage well of a kind of embodiment of the present invention erects imaging of interface C display figure.
Figure 11 is the transmitter module circuit diagram of a kind of embodiment of the present invention.
Figure 12 is the isolation module circuit diagram of a kind of embodiment of the present invention.
Figure 13 is the receiver module pre-amplification circuit figure of a kind of embodiment of the present invention.
Figure 14 is the receiver module main amplifying circuit schematic diagram of a kind of embodiment of the present invention.
Figure 15 is the capture card inner structure schematic diagram of a kind of embodiment of the present invention.
Wherein, 1 system host, 2 take-up stands, 3 control boxs, 4 scramblers, 5 fixed pulleys, 6 composite cables, 7 top connections, hold-down nut on 8, 9 springs, 10 movable nuts, 11 centralizers, 12 times hold-down nuts, 13 ultrasonic phase array detectors, 14 gas storage wells, 15 lower end caps, 16 H-Horn APA system array probes, 110 bar linkage structure formula legs, 111 time delay modules, 112 transmitter modules, 113 isolation modules, 114 receiver modules, 115 capture cards, 116 optical transmitter and receivers, CS gas storage well xsect, VI gas storage well erects interface, the borehole wall in B1, the outer borehole wall of B2, ultrasonic wave acoustic beam in US1 pit shaft, ultrasonic sound field in the US2 borehole wall, overlapping ultrasonic sound field in the US3 borehole wall, P scanning covers point.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
As shown in Figure 1, be a kind of embodiment schematic diagram of a kind of gas storage well bore detection system based on ultrasonic phased array technology of the present invention.This system comprises uphole equipment, underground equipment and composite cable; Uphole equipment comprises system host 1, control box 3, take-up stand 2, fixed pulley 5; Fixed pulley 5 is provided with scrambler 4; Underground equipment includes centralizer 11, detector 13 and annular probe 16; Its composite cable 6 is made up of internal copper wire, optical fiber and cover wire; Copper conductor is that underground equipment is powered, and steel wire pulls underground equipment work, and optical fiber is system host 1 and the medium of communication of underground equipment, it is characterized in that:
Fig. 5 is the high-level schematic functional block diagram of the ultrasonic phase array detection system of a kind of embodiment of the present invention.Described detector is ultrasonic phase array detector 13, comprises time delay module 111, isolation module 113, transmitter module 112, receiver module 114, capture card 115 and optical transmitter and receiver 116; As shown in Figure 6, transmitter module 112 wherein, receiver module 114 form the transmission circuit of ultrasonic phase array detector 13;
Figure 11 is the transmitter module circuit diagram of a kind of embodiment of the present invention.Wherein, VH is a high-voltage power supply, and high pressure is tens volts of supreme hectovolts, and electric capacity C withstand voltage higher than VH, must be charged by resistance R, and S is high-velocity electrons components and parts, is equivalent to a switch.The once complete emission process of ultrasound emission circuit is as follows: in the non-actuated stage, switch S is in off-state, high-voltage power supply VH is charged to electric capacity C by resistance R, until pressure reduction reaches VH between electric capacity C two-plate, in excitation phase, switch S closes, the voltage of the voltage height side of electric capacity is dragged down instantaneously, because electric capacity two ends pressure reduction can not be zero instantaneously, so now have one moment negative high voltage pulse signal produce at electric capacity opposite side and act on the transducer, impel transducers transmit ultrasonic waves, part energy can be consumed in this course, the pressure reduction of electric capacity C both sides is diminished, no longer VH, after a blink (relevant to transducer centre frequency), switch S disconnects, get back to nonexcited state again, the voltage signal of excitation transducer disappears, transducer quits work, electric capacity C is charged again.
In the isolation module circuit diagram shown in Figure 12, connect resistance at the two ends of diode bridge circuit, by the adjustment of this resistance, the bias current by bridge circuit is controlled between 0 ~ 8mA.The amplitude limiter circuit be made up of D5, D6 is received in the output of diode bridge circuit, thus the amplitude of echoed signal is limited in the forward voltage of diode.The input requirements of post-amplifier can be met like this by the echoed signal after amplitude limiting processing, ensure the normal operation of system.
Figure 13 is the receiver module pre-amplification circuit figure of a kind of embodiment of the present invention.Its pre-amplification circuit, the signal for impedance matching and little gain amplifies, and adopt AD603, it is low noise, a voltage control Amplifier, has extremely low input noise and maximum 90MHz bandwidth.Wherein, Vout and FDBK opens a way, and amplifying circuit fixed gain is 50dB, and overall enlargement factor becomes 10dB to 50dB, but bandwidth narrows, and only has 9MHz.
Figure 14 is the receiver module main amplifying circuit schematic diagram of a kind of embodiment of the present invention.Its main amplifying circuit, amplifies further for signal, improves signal to noise ratio (S/N ratio).This main amplifying circuit selects AD82, its be a low noise, at a high speed, voltage feedback operational amplifier, there is 120MHz gain-bandwidth product, rely on its external compensation electric capacity flexibly, purposes is very extensive, is namely applicable to the impact damper in high speed analog-to-digital conversion, is more suitable for video amplifier application.As shown in figure 14, side circuit design is also basic to be carried out with reference to this typical apply of its video amplifier, and has carried out certain compensation to target frequency on feedback circuit.
Figure 15 is the capture card inner structure schematic diagram of a kind of embodiment of the present invention.As shown in the figure, its analog-to-digital conversion module part choice for use becomes the capture card of grade, and model is FCFR-USB9988, there is 12bit sampling resolution and 50MS/s sampling rate, support the highest 4GBytesDDR-IIFIFO, 16 road parallel acquisitions can be realized, adopt USB interface to carry out data and pass through.Analog to digital conversion is the inevitable link that signal can be used in analysis, imaging, is also last link before sending into computing machine, will consider from signal frequency, signal to noise ratio (S/N ratio), integrality angularly.
Described underground equipment is provided with the annular probe described in; Described annular probe is H-Horn APA system array probe, containing being evenly distributed on together layer multiple H-Horn APA system array element group circumferentially; Described each H-Horn APA system array element group has 16n array element; According to the size cases of detected pit shaft internal diameter, the array number of each H-Horn APA system array element group becomes 16 multiple increases and decreases to arrange.Experiment proves, such array element set-up mode, Detection results is better.
When carrying out gas storage well bore and detecting, described system host 1 calculates each group of array element 161 relative time delay time of H-Horn APA system array probe 16 according to the ultrasound beamformer deflection angle that the transmitter module 112 of described ultrasonic phase array detector 13 sends, and passes to the receiver module 114 of ultrasonic phase array detector 13; The time delay module 111 of described ultrasonic phase array detector 13 realizes the relative time delay amount of each group of array element 161, transmitter module 112 encourages each array element 161 of described H-Horn APA system array probe 16 to launch ultrasound wave, isolation module 113 protects voltage devices in late-class circuit not damaged, receiver module 114 converts the echo that H-Horn APA system array probe 16 receives the input signal of capture card 115 to, gather 115 and convert the electrical signal to digital electric signal, digital electric signal is converted to light signal and sends system host 1 to through optical fiber by optical transmitter and receiver 116; The echoed signal received is carried out the process such as filtering, amplification by described system host 1, to extract useful signal for analysis, imaging.For launching ultrasonic signal in maximum efficiency, radiating circuit must impose the frequency high-voltage signal consistent with resonant frequency of a crystal.Wherein time delay module 111, brings up to 1ns by delay precision, can further improve the stepping accuracy of ultrasound wave deflection angle and the image quality of whole system.
Adopt between the centralizer 11 of underground equipment, ultrasonic phase array detector 13, H-Horn APA system array probe 16 and be threaded, use degreasing band, screw thread glue double thread to connect and seal.
Described ultrasonic phase array detector 13 transmission circuit adopts array design, has the multiplexer channel that structure is identical, each paths can independent drive, reception and conditioning ultrasonic signal, do not interfere with each other.Thus the duty of H-Horn APA system array probe 16 can be adapted to, and the independent H-Horn APA system array probe 16 that controls often is organized array element 161 and is received and dispatched ultrasonic signal, in specific implementation, only need to analyze single channel, Design and implementation, remaining passage is then copy completely.The general frame of transmission circuit as shown in Figure 6.For the transmitting ultrasonic signal of maximal efficiency, radiating circuit must impose the frequency high-voltage signal consistent with resonant frequency of a crystal.
The port number of each functional module of described ultrasonic phase array detector 13 is equal to single group H-Horn APA system array element number; The modules of multiplexed ultrasonic phased array detector 13 during multiple H-Horn APA system array element component.When reality detects, borehole wall B1 covers the movement between point in individual pen gas storage well 14, control phased array acoustic beam focus deflection in different angles by ultrasonic phase array detector 13 and realize.
Fig. 8 is the H-Horn APA system array probe 16 scanning schematic diagram of a kind of embodiment of the present invention.As shown in Figure 8, described H-Horn APA system array probe 16 includes four H-Horn APA system array element groups, and each H-Horn APA system array element group has 16 array elements.H-Horn APA system array probe 16 is without the need to rotating in testing process, then detection system does not need rotating mechanism.
Described underground equipment comprises two centralizers 11.As shown in Figure 3, each centralizer 11 is made up of upper hold-down nut 8, spring 9, bar linkage structure formula leg 110, movable nut 10 and lower hold-down nut 12.
As shown in Figure 4, described centralizer 11 is provided with three and is spaced apart 120 ° of bar linkage structure formula legs 110, can along borehole wall touch scrolling, can synchronously folding and unfolding.Move up and down movable nut 10, compressing and stretching spring 9, centralizer 11 bar linkage structure formula leg 110 stretches folding, makes underground equipment can keep vertical in the gas storage well of different-diameter.The centralizer stability of this kind of structure is strong, and dexterity of action is high.
Fig. 2 is the process flow diagram of a kind of embodiment of a kind of gas storage well bore detection method based on ultrasonic phased array technology of the present invention.Its detection system adopted comprises uphole equipment, underground equipment and composite cable 6, and described uphole equipment comprises system host 1, control box 3, take-up stand 2, fixed pulley 5; Described fixed pulley 5 is provided with scrambler 4; Underground equipment comprises centralizer 11, detector 13 and annular probe 16; Described composite cable 6 is made up of internal copper wire, optical fiber and cover wire; Copper conductor is that underground equipment is powered, and steel wire pulls underground equipment work, and optical fiber is the medium of communication of system host and underground equipment, it is characterized in that:
Described detector is ultrasonic phase array detector 13, comprises time delay module 111, isolation module 113, transmitter module 112, receiver module 114, capture card 115 and optical transmitter and receiver 116; Described transmitter module 112, receiver module 114 form the transmission circuit of ultrasonic phase array detector 13;
Described annular probe is H-Horn APA system array probe 16, and comprise and be evenly distributed on together layer multiple H-Horn APA system array element group circumferentially, each array element group is made up of 16n array element;
Described detection method comprises the following steps:
Step 1, build detection system; Clear water is filled in gas storage well well, as ultrasonic-detection couplant, at well head, fixed pulley is installed, composite cable is used to set up communication between underground equipment, scrambler, control box, take-up stand and system host and mechanical connection, with the communication realized between system host and underground equipment and the scanning work controlling underground equipment lifting and ultrasonic phase array detector.And underground equipment is sealed;
Step 2, start up system main frame, place underground equipment in well, synchronization encoders data, location underground equipment, and adjustment centralizer, makes each bar linkage structure formula leg of centralizer contact with the borehole wall, to keep H-Horn APA system array probe and pit shaft coaxially parallel;
Step 3, adjust well divide into initial detecting scanning position to the utmost, start ultrasonic phase array detector, control underground equipment and at the uniform velocity move up or down, start scanning work with control box;
Step 4, system host calculate each array element relative time delay time of H-Horn APA system array probe according to ultrasound beamformer deflection angle, and pass to ultrasonic phase array detector; The time delay module of ultrasonic phase array detector realizes the relative time delay amount of each array element of H-Horn APA system array probe, each array element of H-Horn APA system array probe described in transmitter module excitation launches ultrasound wave, in isolation module protection late-class circuit, voltage devices is not damaged, receiving circuit converts the echo that H-Horn APA system array probe receives the input signal of capture card to, capture card converts the electrical signal to digital electric signal, and digital electric signal is converted to light signal and sends system host to through optical fiber by optical transmitter and receiver; The array element scanning successively of many groups H-Horn APA system array element group, single group H-Horn APA system array element is launched the deflection ultrasound beamformer scanning borehole wall according to focusing rule and receives echoed signal, and reception data are converted to light signal through optical transmitter and receiver, send system host to through optical fiber; Wherein time delay module, should bring up to 1ns by delay precision as far as possible, can further improve the stepping accuracy of ultrasound wave deflection angle and the image quality of whole system.
Step 5, system host process underground equipment positional information and echo data, and demonstrate well bore wall thickness and the corrosion condition of relevant position; Then the data image that stored record is relevant;
Step 6, when each group of phased array array probe array element all receives and dispatches a ultrasound wave, the scanning of this position terminates.Judge to detect and whether complete, if complete, then arrange detection of end after all checkout equipments; If do not complete, then system host controls underground equipment and moves to next scanning position, repeating said steps 3 to step 6.Borehole wall scanning scope, in phased array array probe 16 near field region, also can not affect testing result.Usual gas storage well radius is 88.9 or 122.24mm, much larger than the near field region that general ultrasonic phase array is popped one's head in (about 20mm).
The port number of the described each module of ultrasonic phase array detector equals the list group H-Horn APA system array element number of described H-Horn APA system array probe, when detecting, and the modules of many group H-Horn APA system array element time-sharing multiplex ultrasonic phase array detectors.
The single scanning line that described H-Horn APA system array probe produces when carrying out scanning is synthesized by all H-Horn APA system array element groups reception ultrasonic echo compensation of delay of described H-Horn APA system array probe, acoustic beam to obtain; Described single scanning is A scanning.
In described step 5, first system host carries out time-delay for phased array compensation, acoustic beam synthesis to echo, then in conjunction with the underground equipment positional information imaging of scrambler record, and the corrosion condition in the display borehole wall and wall thickness.Its imaging mode includes S display and C display.As shown in Figure 9 and Figure 10, be that the gas storage well xsect imaging S display figure of a kind of embodiment of the present invention and gas storage well erect imaging of interface C display figure respectively.Imaging mode provided by the present invention is more comprehensive, is beneficial to the location and qualitative analysis of detecting defect.And, gas storage well is erected imaging of interface information and combine with xsect image-forming information, the shape that the borehole wall corrodes can be found out.
Claims (10)
1. based on a gas storage well bore detection system for ultrasonic phased array technology, comprise uphole equipment, underground equipment and composite cable, described uphole equipment comprises system host, control box, take-up stand, fixed pulley; Described fixed pulley is provided with scrambler; Underground equipment comprises centralizer, detector and annular probe; Described composite cable is made up of internal copper wire, optical fiber and cover wire; Copper conductor is that underground equipment is powered, and steel wire pulls underground equipment work, and optical fiber is the medium of communication of system host and underground equipment, it is characterized in that:
Described detector is ultrasonic phase array detector, comprises time delay module, isolation module, transmitter module, receiver module, capture card and optical transmitter and receiver; Described transmitter module, receiver module form the transmission circuit of ultrasonic phase array detector;
Described underground equipment is provided with the annular probe described in; Described annular probe is H-Horn APA system array probe, containing being evenly distributed on together layer multiple H-Horn APA system array element group circumferentially; Described each H-Horn APA system array element group has 16n H-Horn APA system array element;
When carrying out gas storage well bore and detecting, described system host calculates each group of array element relative time delay time of H-Horn APA system array probe according to the ultrasound beamformer deflection angle that the transmitter module of described ultrasonic phase array detector sends, and passes to the receiver module of ultrasonic phase array detector; The time delay module of described ultrasonic phase array detector realizes the relative time delay amount of each group of array element, each array element of H-Horn APA system array probe described in transmitter module excitation launches ultrasound wave, in isolation module protection late-class circuit, voltage devices is not damaged, receiver module converts the echo that H-Horn APA system array probe receives the input signal of capture card to, capture card converts the electrical signal to digital electric signal, and digital electric signal is converted to light signal and sends system host to through optical fiber by optical transmitter and receiver; The echoed signal received is carried out the process such as filtering, amplification by described system host, to extract useful signal for analysis, imaging.
2. a kind of gas storage well bore detection system based on ultrasonic phased array technology according to claim 1, it is characterized in that: described ultrasonic phase array detector transmission circuit adopts array design, have the multiplexer channel that structure is identical, each paths can independent drive, reception and conditioning ultrasonic signal, do not interfere with each other.
3. a kind of gas storage well bore detection system based on ultrasonic phased array technology according to claim 1 and 2, is characterized in that: the port number of each functional module of described ultrasonic phase array detector is equal to single group H-Horn APA system array element number; The modules of multiplexed ultrasonic phased array detector during multiple H-Horn APA system array element component.
4. a kind of gas storage well bore detection system based on ultrasonic phased array technology according to claim 1, it is characterized in that: described H-Horn APA system array probe includes four H-Horn APA system array element groups, each H-Horn APA system array element group has 16 array elements.
5. a kind of gas storage well bore detection system based on ultrasonic phased array technology according to claim 1, is characterized in that: described underground equipment comprises two centralizers.
6. a kind of gas storage well bore detection system based on ultrasonic phased array technology according to claim 1, is characterized in that: described centralizer is provided with three and is spaced apart 120 ° of bar linkage structure formula legs, can along borehole wall touch scrolling, can synchronously folding and unfolding.
7. based on a gas storage well bore detection method for ultrasonic phased array technology, its detection system comprises uphole equipment, underground equipment and composite cable, and described uphole equipment comprises system host, control box, take-up stand, fixed pulley; Described fixed pulley is provided with scrambler; Underground equipment comprises centralizer, detector and annular probe; Described composite cable is made up of internal copper wire, optical fiber and cover wire; Copper conductor is that underground equipment is powered, and steel wire pulls underground equipment work, and optical fiber is the medium of communication of system host and underground equipment, it is characterized in that:
Described detector is ultrasonic phase array detector, comprises time delay module, isolation module, transmitter module, receiver module, capture card and optical transmitter and receiver; Described transmitter module, receiver module form the transmission circuit of ultrasonic phase array detector;
Described annular probe is H-Horn APA system array probe, and comprise and be evenly distributed on together layer multiple H-Horn APA system array element group circumferentially, each array element group is made up of 16n array element;
Described detection method comprises the following steps:
Fill clear water in step 1, gas storage well, fixed pulley, scrambler are installed, build the communication system of scrambler, control box, ultrasonic phased array inspection instrument three and system host with composite cable, and underground equipment is sealed;
Step 2, start up system main frame, place underground equipment in well, synchronization encoders data, location underground equipment, and adjustment centralizer contacts with the borehole wall, to keep H-Horn APA system array probe and pit shaft coaxially parallel;
Step 3, adjust well divide into initial detecting position to the utmost, start ultrasonic phase array detector, control underground equipment and at the uniform velocity move up or down, start scanning work with control box;
Step 4, system host calculate each array element relative time delay time of H-Horn APA system array probe according to ultrasound beamformer deflection angle, and pass to ultrasonic phase array detector; The time delay module of ultrasonic phase array detector realizes the relative time delay amount of each array element of H-Horn APA system array probe, each array element of H-Horn APA system array probe described in transmitter module excitation launches ultrasound wave, in isolation module protection late-class circuit, voltage devices is not damaged, receiving circuit converts the echo that H-Horn APA system array probe receives the input signal of capture card to, capture card converts the electrical signal to digital electric signal, and digital electric signal is converted to light signal and sends system host to through optical fiber by optical transmitter and receiver; The array element scanning successively of many groups H-Horn APA system array element group, single group H-Horn APA system array element is launched the deflection ultrasound beamformer scanning borehole wall according to focusing rule and receives echoed signal, and reception data are converted to light signal through optical transmitter and receiver, send system host to through optical fiber;
Step 5, system host process underground equipment positional information and echo data, and demonstrate well bore wall thickness and the corrosion condition of relevant position; Then the data image that stored record is relevant;
Step 6, judge to detect and whether complete, if complete, then arrange detection of end after all checkout equipments; If do not complete, then system host controls underground equipment and moves to next scanning position, repeating said steps 3 to step 6.
8. a kind of gas storage well bore detection method based on ultrasonic phased array technology according to claim 7, it is characterized in that: the port number of the described each module of ultrasonic phase array detector equals the list group H-Horn APA system array element number of described H-Horn APA system array probe, when detecting, the modules of many group H-Horn APA system array element time-sharing multiplex ultrasonic phase array detectors.
9. a kind of gas storage well bore detection method based on ultrasonic phased array technology according to claim 7, it is characterized in that: the single scanning line that described H-Horn APA system array probe produces when carrying out scanning, is synthesized by all H-Horn APA system array element groups reception ultrasonic echo compensation of delay of described H-Horn APA system array probe, acoustic beam to obtain; Described single scanning is A scanning.
10. a kind of gas storage well bore detection method based on ultrasonic phased array technology according to claim 7, is characterized in that: in described step 5, and detection system can to show and gas storage well erects imaging of interface C and shows by real-time implementation gas storage well xsect imaging S.
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