CN104677984A - Nondestructive testing system for oil tube defects - Google Patents
Nondestructive testing system for oil tube defects Download PDFInfo
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- CN104677984A CN104677984A CN201410758124.6A CN201410758124A CN104677984A CN 104677984 A CN104677984 A CN 104677984A CN 201410758124 A CN201410758124 A CN 201410758124A CN 104677984 A CN104677984 A CN 104677984A
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- oil pipe
- chip microcomputer
- detection system
- usb interface
- nondestructive detection
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Abstract
The invention relates to the technical field of measurement and test automation of modern electronic technologies, and particularly relates to a nondestructive testing system for oil tube defects. The nondestructive testing system for oil tube defects is composed of a magnetic detection sensor, a signal amplification circuit, a single chip microcomputer, a USB interface chip and an upper computer which are sequentially connected in series, wherein A/D converters are arranged in the single chip microcomputer, A/D conversion ports of the A/D converters are located at P1 ports (P1.7-P1.0), and eight paths of 10-bit high-speed A/D converters are arranged. According to the invention, a nondestructive testing system is designed for oil tube defects. The whole system is divided into three parts, i.e. the acquisition of defect signals, the processing of signals, and the real-time display of defects. In the paper, the compositions and principle of each part of the system and the communication process of the system are introduced in detail. The whole system is low in cost and simple to operate; and multiple field tests show that the system is high in reliability, rapid and accurate, therefore, the system is a good apparatus for detecting oil tube defects.
Description
Technical field
The present invention relates to modern electronic technology and measure test automation technical field, be specifically related to a kind of oil pipe defect nondestructive detection system.
Background technology
Oil pipe is on active service at rugged environment for a long time, is easy to the accidents such as fracture or leakage occur, and the on-the-spot Non-Destructive Testing of oil pipe is for preventing having great importance of this type of accident.
Summary of the invention
In order to solve the problem, the present invention is intended to propose a kind of oil pipe defect nondestructive detection system.
Technical program of the present invention lies in:
A kind of oil pipe defect nondestructive detection system, is made up of the magnetism detecting sensor of connecting successively, signal amplification circuit, single-chip microcomputer, USB interface chip and host computer; Wherein, the built-in A/D converter of single-chip microcomputer, its A/D changes mouth at P1 mouth (P1.7 ~ P1.0), has 10,8 tunnel high-speed a/d converter.
Preferably, the same cross section of described magnetism detecting sensor is arranged M comprises the contact unit of the permanent energized circuit of rare earth respectively to oil pipe axial excitation, the magnetic leakage flux that the poly-magnetic assembly array adopting circumferential coverage overlapped is responded between stray field that the local defect such as etch pit, hole produces and contact unit two magnetic pole that wall thickness reduction defect causes simultaneously changes.
Preferably, described signal amplification circuit adopts four road operational amplifier TLC2264 chips.
Preferably, described USB interface chip adopts CH375 USB interface chip, and it is connected with the P2 mouth of single-chip microcomputer; Its inside is integrated with PLL frequency multiplier, principal and subordinate USB interface SIE, data buffer, passive parallel interface, Asynchronous Serial Interface, command interpreter, the protocol processor of controls transfer and firmware program.
More preferably, described CH375 USB interface chip can; Connect 5V and 3.3V supply voltage, and support low-power consumption mode.
Or 51 single-chip microcomputer STCl2C5404AD selected by preferably, described single-chip microcomputer.
Technique effect of the present invention is:
The present invention is directed to oil pipe faultiness design nondestructive detection system.Whole system is divided into three parts, comprises the real-time display of the collection of flaw indication, the process of signal and defect.Describe the formation of system various piece and the communication process of principle and system thereof herein in detail.Whole system is with low cost, simple to operate, and through scene, repeatedly Test Application proves that this system reliability is high, quick and precisely, is a set of good equipment for detecting oil pipe defect.
Embodiment
A kind of oil pipe defect nondestructive detection system, is made up of the magnetism detecting sensor of connecting successively, signal amplification circuit, single-chip microcomputer, USB interface chip and host computer; Wherein, the built-in A/D converter of single-chip microcomputer, its A/D changes mouth at P1 mouth (P1.7 ~ P1.0), has 10,8 tunnel high-speed a/d converter.Wherein, the same cross section of magnetism detecting sensor is arranged M comprises the contact unit of the permanent energized circuit of rare earth respectively to oil pipe axial excitation, the magnetic leakage flux that the poly-magnetic assembly array adopting circumferential coverage overlapped is responded between stray field that the local defect such as etch pit, hole produces and contact unit two magnetic pole that wall thickness reduction defect causes simultaneously changes.Signal amplification circuit adopts four road operational amplifier TLC2264 chips.USB interface chip adopts CH375 USB interface chip, and it is connected with the P2 mouth of single-chip microcomputer; Its inside is integrated with PLL frequency multiplier, principal and subordinate USB interface SIE, data buffer, passive parallel interface, Asynchronous Serial Interface, command interpreter, the protocol processor of controls transfer and firmware program.CH375 USB interface chip can; Connect 5V and 3.3V supply voltage, and support low-power consumption mode.51 single-chip microcomputer STCl2C5404AD selected by single-chip microcomputer.
For the electromagnetic detection of pipe bar class A of geometric unitA, be generally in electromagnetic detection sensor, adopt magneto sensor to extract the change that local defect, wall thickness reduction defect or cross section metal amass the magnetic field parameter that loss type defect causes, obtain the various defect information about detected object.The magnetism detecting sensor that the present invention adopts can realize the field integrated detection of oil pipe local defect and wall thickness reduction defect.The design of this sensor take into account the singularity that tubing on-site detects operating mode, and this sensor has three large technical characterstics compared with the electromagnetic detection sensor of domestic and international existing pipe bar class A of geometric unitA defect: (1) arranges that on the same cross section of this sensor M comprises the contact unit of the permanent energized circuit of rare earth respectively to oil pipe axial excitation, not only ensure oil pipe uniform magnetization but also add the magnetic flux in oil pipe as much as possible, reach the closely saturated or saturated magnetization requirement that oil pipe is detected.(2) the poly-magnetic assembly array that this sensor adopts circumferential coverage overlapped responds to the magnetic leakage flux change between stray field that the local defect such as etch pit, hole produces and contact unit two magnetic pole that wall thickness reduction defect causes simultaneously, realize the comprehensive detection of local defect and wall thickness reduction defect, simplify sensor construction, improve detection efficiency.(3) the servo-actuated centering technology based on flexible link is adopted, make each contact unit can in radial mobile, the opening and closing automatically flexibly of oil pipe, sensor moves about flexibly relative to well head set-up, overcomes or the shape that reduces oil pipe such as bends, rocks or misalign at the interference that situation may produce detector.
Claims (6)
1. an oil pipe defect nondestructive detection system, is characterized in that: be made up of the magnetism detecting sensor of connecting successively, signal amplification circuit, single-chip microcomputer, USB interface chip and host computer; Wherein, the built-in A/D converter of single-chip microcomputer, its A/D changes mouth at P1 mouth (P1.7 ~ P1.0), has 10,8 tunnel high-speed a/d converter.
2. as claim 1 oil pipe defect nondestructive detection system, it is characterized in that: the same cross section of described magnetism detecting sensor is arranged M comprises the contact unit of the permanent energized circuit of rare earth respectively to oil pipe axial excitation, the magnetic leakage flux that the poly-magnetic assembly array adopting circumferential coverage overlapped is responded between stray field that the local defect such as etch pit, hole produces and contact unit two magnetic pole that wall thickness reduction defect causes simultaneously changes.
3. as claim 1 oil pipe defect nondestructive detection system, it is characterized in that: described signal amplification circuit adopts four road operational amplifier TLC2264 chips.
4. as claim 1 oil pipe defect nondestructive detection system, it is characterized in that: described USB interface chip adopts CH375 USB interface chip, and it is connected with the P2 mouth of single-chip microcomputer; Its inside is integrated with PLL frequency multiplier, principal and subordinate USB interface SIE, data buffer, passive parallel interface, Asynchronous Serial Interface, command interpreter, the protocol processor of controls transfer and firmware program.
5. as claim 4 oil pipe defect nondestructive detection system, it is characterized in that: described CH375 USB interface chip can; Connect 5V and 3.3V supply voltage, and support low-power consumption mode.
6., as claim 1 oil pipe defect nondestructive detection system, it is characterized in that: 51 single-chip microcomputer STCl2C5404AD selected by described single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410758124.6A CN104677984A (en) | 2014-12-11 | 2014-12-11 | Nondestructive testing system for oil tube defects |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410758124.6A CN104677984A (en) | 2014-12-11 | 2014-12-11 | Nondestructive testing system for oil tube defects |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104677984A true CN104677984A (en) | 2015-06-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410758124.6A Pending CN104677984A (en) | 2014-12-11 | 2014-12-11 | Nondestructive testing system for oil tube defects |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104677984A (en) |
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2014
- 2014-12-11 CN CN201410758124.6A patent/CN104677984A/en active Pending
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150603 |
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| WD01 | Invention patent application deemed withdrawn after publication |