CN110487906A - A kind of ultrasonic phased array detection method of polyethylene electric-melting connector - Google Patents
A kind of ultrasonic phased array detection method of polyethylene electric-melting connector Download PDFInfo
- Publication number
- CN110487906A CN110487906A CN201810465176.2A CN201810465176A CN110487906A CN 110487906 A CN110487906 A CN 110487906A CN 201810465176 A CN201810465176 A CN 201810465176A CN 110487906 A CN110487906 A CN 110487906A
- Authority
- CN
- China
- Prior art keywords
- phased array
- probe
- electric
- polyethylene
- melting connector
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01N29/06—Visualisation of the interior, e.g. acoustic microscopy
- G01N29/0654—Imaging
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/028—Material parameters
- G01N2291/0289—Internal structure, e.g. defects, grain size, texture
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/04—Wave modes and trajectories
- G01N2291/044—Internal reflections (echoes), e.g. on walls or defects
Abstract
The present invention provides a kind of ultrasonic wave time difference diffraction (TOFD) detection method of polyethylene hot melt weld seam.Water coincidence is carried out by research and development customization zero degree water voussoir, utilize ultrasonic wave time difference diffraction (TOFD) technology, it is focused rule setting by algorithm, the mode that the hair one that the symmetrical wideband-short pulse probe of two opposite axiss of a weld uses is received detects PE hot melt weld seam.Receive probe by receiving diffracted signal and its time difference at defect tip to determine position and the height size of weld seam internal flaw.The invention patent is able to achieve to hot melt weld defect accurate quantitative analysis, and detection success rate is high and detection data can recorde storage, not only promotes the safety of polyethylene butt-fusion welded joint, and testing result has traceability.
Description
Technical field
The present invention relates to polyethylene electric-melting welding fields, and in particular to the ultrasonic phased array of polyethylene electric-melting fusion splice
Detection method.
Background technique
High density polyethylene (HDPE) (HDPE) tubing is since corrosion-resistant, anti-seismic performance is good, light-weight, long service life etc. is many excellent
Point is largely used in the fields such as municipal water supply pipe network, sponge city, fuel gas transmission, petrochemical industry in recent years.Based on U.S.'s machinery
Association of Engineers (ASME) numerous studies and practical engineering application show that HDPE tubing is very suitable to replacing nuclear power station recirculated water cooling
But existing carbon steel pipe and line plastic-steel tube in system, to solve the problems, such as the seawater corrosion of carbon steel pipe and line plastic-steel tube.Current poly- second
Alkene pipeline generallys use heat-melting butt-joint and connects with electric smelting, Construction Condition lesser for nuclear power station installation space, electric smelting connection
Probability is much bigger.How to ensure that the safety of polyethylene pipe system electric fusion joint seems very heavy for nuclear power station
It wants.
In order to solve these technical problems, the method for some non-destructive testings is just in use to polyethylene from metal material field
Field.Such as THERMAL IMAGING NONDESTRUCTIVE TESTING, X-ray non-destructive testing and Ultrasonic NDT.Answering according to U.S. ASME at present
With research, the diffraction time difference method (TOFD) and phase array method (PA) of ultrasound detection are most suitable for the inspection of polythene material.But at present
There are still following problems for market conventional ultrasound detection: the data of 1. testing results can not Electronic saving, cause testing result without
Method is traced to the source, and subsequent retrospect is consulted extremely difficult；2. conventional Ultrasound is usually that pulse is shown, the human interference in detection process because
Plain big, requirement professional to technical staff is high, needs experience abundant；3. conventional Ultrasound testing result does not have intuitive display function
Can, can not quicklook Reaction Welding position section state, be difficult to after detection in time to Flaw discrimination.
Summary of the invention
To solve the above problems, the present invention provides a kind of ultrasonic detection method of polyethylene electric-melting connector, this method tool
Body the following steps are included:
Step 1: selecting the long connecting rod or short connecting rod of corresponding number according to PE tube outer diameter, assembles chain type scanner.
Step 2: phased array probe is selected according to the characterization processes of polyethylene electric-melting connector workpiece, and in special development
Phased array probe is installed on zero degree water logging voussoir.
Step 3: locking detector imports couplant from voussoir interface, guarantees good acoustics coupling between workpiece and probe
It closes.
Step 4: the rule setting depth of focus and Scanning speed are focused using zero degree vertical linearity.Acquisition unit excites arteries and veins
Signal is rushed, pulse signal is excited probe chip after calculating by phased array array element computed phase delay, and probe generates ultrasonic wave.
Step 5: ultrasonic wave is propagated in polyethylene electric-melting connector workpiece, and after encountering reflection object, sound wave reflex exists
Probe, switchs to electric signal for acoustical signal.
Step 6: phased array element carries out calculating integration to electric signal, and acquisition unit receives the signal after integration
And carry out software algorithm imaging.
Step 7: the ultrasonic phased array testing result of each electric fusion joint is stored by electronical record, maximum storage capacity
It is 200.And storing data can export and utilize software analyzing defect specific location and size.
The invention has the following advantages that 1. can be with Electronic saving testing result, maximum capacity 200；2. greatly reducing people
For the factor of disturbing, improves detection and met accuracy rate；It, can be timely and effectively to inspection 3. the section of fusion splice is shown with image format
It surveys result to be qualitatively judged, improves equipment work efficiency.
Detailed description of the invention
Fig. 1 is method schematic diagram of the invention.
Fig. 2 is that the present invention sweeps schematic diagram to electric fusion joint implementation vertical line.
Fig. 3 is that polyethylene electric-melting connector ultrasonic testing results image of the invention is shown.
Specific embodiment
Embodiment
Step 1: 360 ° of cleanings are carried out for polyethylene electric-melting weld to be measured area surface, it is ensured that free from admixture interference.
Step 2: selecting the long connecting rod or short connecting rod of corresponding number according to polyethylene electric-melting connector outer diameter to be detected,
Assemble chain type scanner.
Step 3: frequency 2.25-2.50MHz phased array is selected according to the characterization processes of polyethylene electric-melting connector workpiece and is visited
Head, and phased array probe pulse is installed on the zero degree water logging voussoir of special development.
Step 3: locking detector imports couplant from voussoir interface, if condition has preferential selection hydroxylmethyl cellulose
Plain aqueous solution guarantees good acoustics coupling between workpiece and probe as couplant.
Step 4: rule is focused using zero degree vertical linearity and sets depth of focus 20mm, Scanning speed 120mm/s, label
Scanning direction and scanning zero point, overlay length at least 25-30mm.
Step 5: acquisition unit excitation pulse signal, phased array array element computed phase delay, by pulse signal after calculating
Excitation probe chip, probe generate ultrasonic wave.
Step 5: ultrasonic wave is propagated in polyethylene electric-melting connector workpiece, and after encountering reflection object, sound wave reflex exists
Probe, switchs to electric signal for acoustical signal.
Step 6: phased array element carries out calculating integration to electric signal, and receiving unit is received.
Step 7: receiving unit received signal is by coder transitions at the image in polyethylene electric-melting weld area.
As shown in Figure of description 3, if there is a defect reflection echo, then it is chosen as individual defect.Individual defect should be recorded most
Big echo amplitude；If there is two or more defect reflection echos, then it is chosen as multiple defects or group's defect, should be recorded more
The maximum echo amplitude of edge defect in a defect.
8. the foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited to
This, anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention
And its inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (1)
1. a kind of ultrasonic phased array detection method of polyethylene electric-melting connector, it is characterised in that: this method specifically includes following
Step:
Step 1: selecting the long connecting rod or short connecting rod of corresponding number according to polyethylene electric-melting connector workpiece outer diameter, assembles chain type
Scanner.
Step 2: phased array probe is selected according to the characterization processes of polyethylene electric-melting connector workpiece, and in the zero degree of special development
Phased array probe is installed on water logging voussoir.
Step 3: locking detector imports couplant from voussoir interface, guarantees good acoustics coupling between workpiece and probe.
Step 4: the rule setting depth of focus and Scanning speed are focused using zero degree vertical linearity.Acquisition unit excitation pulse letter
Number, pulse signal is excited probe chip after calculating by phased array array element computed phase delay, and probe generates ultrasonic wave.
Step 5: ultrasonic wave penetrates propagation in polyethylene electric-melting connector workpiece, and after encountering reflection object, sound wave reflex exists
Probe, switchs to electric signal for acoustical signal.
Step 6: phased array element carries out calculating integration to electric signal, and acquisition unit receive to the signal after integration and be gone forward side by side
The imaging of row software algorithm.
Step 7: the ultrasonic phased array testing result of each electric fusion joint is stored by electronical record, can be exported and be utilized soft
Part analyzing defect specific location and size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810465176.2A CN110487906A (en) | 2018-05-15 | 2018-05-15 | A kind of ultrasonic phased array detection method of polyethylene electric-melting connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810465176.2A CN110487906A (en) | 2018-05-15 | 2018-05-15 | A kind of ultrasonic phased array detection method of polyethylene electric-melting connector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110487906A true CN110487906A (en) | 2019-11-22 |
Family
ID=68544982
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810465176.2A Pending CN110487906A (en) | 2018-05-15 | 2018-05-15 | A kind of ultrasonic phased array detection method of polyethylene electric-melting connector |
Country Status (1)
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| CN (1) | CN110487906A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114019027A (en) * | 2021-10-22 | 2022-02-08 | 中国计量大学 | Detection method and system for hot-melt joint of polyethylene pipe and upper computer |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101393170A (en) * | 2008-10-18 | 2009-03-25 | 浙江省特种设备检验研究院 | Coupling and focusing ultrasonic detection method and detection device for polyethylene pipe hot melt butt joint |
| CN105259252A (en) * | 2015-10-15 | 2016-01-20 | 浙江大学 | Method for automatically identifying defect type of polyethylene electrofusion joint through ultrasonic phased array inspection |
| CN105445371A (en) * | 2015-11-19 | 2016-03-30 | 中国航空工业集团公司北京航空材料研究院 | Ultrasonic phased array rapid scanning device and detection method of electronic beam welding line |
-
2018
- 2018-05-15 CN CN201810465176.2A patent/CN110487906A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101393170A (en) * | 2008-10-18 | 2009-03-25 | 浙江省特种设备检验研究院 | Coupling and focusing ultrasonic detection method and detection device for polyethylene pipe hot melt butt joint |
| CN105259252A (en) * | 2015-10-15 | 2016-01-20 | 浙江大学 | Method for automatically identifying defect type of polyethylene electrofusion joint through ultrasonic phased array inspection |
| CN105445371A (en) * | 2015-11-19 | 2016-03-30 | 中国航空工业集团公司北京航空材料研究院 | Ultrasonic phased array rapid scanning device and detection method of electronic beam welding line |
Non-Patent Citations (3)
| Title |
|---|
| 王悦民 等: "《超声相控阵检测技术与应用》", 31 December 2014, 国防工业出版社 * |
| 郭伟灿 等: "超声相控阵技术在聚乙烯管道电熔接头上的应用", 《中国特种设备安全》 * |
| 马占生 等: "《钢轨探伤》", 31 August 2014, 西南交通大学出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114019027A (en) * | 2021-10-22 | 2022-02-08 | 中国计量大学 | Detection method and system for hot-melt joint of polyethylene pipe and upper computer |
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Application publication date: 20191122 |
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