CN202562863U

CN202562863U - Intelligent detection system for oil pipeline weld-seam inspection

Info

Publication number: CN202562863U
Application number: CN2012202228216U
Authority: CN
Inventors: 张岩; 聂永丹; 唐国维; 胡庆; 赵建民; 李井辉
Original assignee: Northeast Petroleum University
Current assignee: Northeast Petroleum University
Priority date: 2012-05-18
Filing date: 2012-05-18
Publication date: 2012-11-28
Anticipated expiration: 2022-05-18

Abstract

An intelligent detection system for an oil pipeline weld-seam inspection mainly solves the problems that information collection after an x-ray sheet is sampled in the welding field in the prior art is judged and detected manually, precision is poor and efficiency is low. The intelligent detection system for the oil pipeline weld-seam inspection is characterized in that a weld-seam inspection image-collecting module comprises an x-ray emitter and an image receiver to collect the x-ray weld-seam inspection into a digital inspection image. Inspection image signals output by the weld-seam inspection image-collecting module are converted into digital signals through a universal serial bus (USB) port, and input into an edge extracting-detecting digital signal processor (DSP) chip to be processed. The DSP chip is connected with an accumulator read-in module (ARM) microprocessor which is connected to a storage device through the USB port and connected to a network device through wired and wireless network ports. The intelligent detection system can improve efficiency of the x-ray weld-seam inspection detection, and enables sheet evaluation results to be close to or uniform to standards.

Description

A kind of oil pipeline seam inspection intelligent checking system

Technical field

The utility model relates to a kind of intelligent checking system that is applied in the welding field.

Background technology

Solder technology is widely used in the every field in national defence and the industrial construction.The X ray Real-time Imaging does not have good characteristics such as film, detection efficiency are high, real-time is good with it and to become a kind of important industrial nondestructive testing technological, and its testing result is as the important judgment basis of weld defect analysis and grade estimation.Obtained using widely and developing at the oil transport field.The detection of common X ray weld seam egative film and the workflow of evaluation are after at first having the X ray transmitter that X ray is penetrated weld seam; By the picture receiver that places behind the weld seam; Extract through video camera again; After image pick-up card is handled, comment the sheet personnel under viewbox, to carry out by experienced specialty, it comments the examined personnel's integrating skills of process of sheet, about the restriction of process knowledge, practical experience, understanding and grasp specialized standard ability; The influence of the direct examined person's subjective factor of testing result, and labour intensity is big.Therefore for improving X ray seam inspection detection efficiency, impel and comment the sheet result to be tending towards standard, then press for the computer intelligence detection system that development is fit to oil pipeline weld seam needs, to realize the robotization of defects detection and weldquality evaluation with consistent.

Summary of the invention

The technical matters of mentioning in order to solve in the background technology; The utility model provides a kind of oil pipeline seam inspection intelligent checking system; This kind system has that volume is little, low in energy consumption, processing speed is fast, be easy to integrated advantage; Can improve X ray seam inspection detection efficiency, impel and comment the sheet result to be tending towards standard with consistent.

The technical scheme of the utility model is: this kind oil pipeline seam inspection intelligent checking system; Comprise seam inspection image capture module, communication module, edge extracting and detection dsp chip and ARM microcontroller, it is characterized in that: comprise the X ray transmitter in the said seam inspection image capture module and with realization the X ray seam inspection is gathered into digital defectogram picture with picture receiver; Be input to said edge extracting and detect in the dsp chip after converting digital signal by the defectogram image signal of said seam inspection image capture module output to through USB interface to realize that DSP handles; Said dsp chip links to each other with the ARM microcontroller, and said ARM microcontroller links to each other with memory device through USB interface respectively, is connected with the network equipment with radio network interface through wired.

The utlity model has following beneficial effect: this kind system utilizes dsp chip to carry out wavelet transformation earlier to transmitting the digital signal of coming; Detect a flaw again behind the image border; Binary conversion treatment is carried out defects detection then, judges the rank of defective then according to examination criteria; Can improve X ray seam inspection detection efficiency like this, impel and comment the sheet result to be tending towards standard with consistent.In addition, this system has that volume is little, low in energy consumption, processing speed is fast, be easy to integrated advantage; Adopt wavelet transformation technique to carry out feature extraction and can detect the defective edge feature in the radioscopic image effectively, the defect recognition technology in conjunction with artificial intelligence can improve the automatic identification efficiency of oil pipeline weld defect.

Description of drawings:

Fig. 1 is the formation synoptic diagram of the utility model.

Fig. 2 is the wiring diagram of the main pin of the said system master of the utility model unit.

Fig. 3 is the course of work block diagram of the said system of the utility model.

Embodiment:

Below in conjunction with accompanying drawing the utility model is described further:

By shown in Figure 1; This kind oil pipeline seam inspection intelligent checking system; Comprise seam inspection image capture module, communication module, edge extracting and detection dsp chip and ARM microcontroller, it is characterized in that: comprise the X ray transmitter in the said seam inspection image capture module and with realization the X ray seam inspection is gathered into digital defectogram picture with picture receiver; Be input to said edge extracting and detect in the dsp chip after converting digital signal by the defectogram image signal of said seam inspection image capture module output to through USB interface to realize that DSP handles; Said dsp chip links to each other with the ARM microcontroller, and said ARM microcontroller links to each other with memory device through USB interface respectively, is connected with the network equipment with radio network interface through wired.

During concrete the realization, combine shown in Figure 2ly like Fig. 1, the hardware logic structure of employing comprises seam inspection image capture module, edge extracting and detection dsp chip, ARM microcontroller, communication module.Wherein the seam inspection image capture module comprises X ray transmitter and picture receiver, video camera etc.; Edge extracting is the TMS320C6713 digital signal processor of TI company with the employing of detection dsp chip; On this platform, develop image processing programs such as image wavelet transform, edge extracting and detection algorithm; Testing result can be passed to host A RM end through the HPI oral instructions, ARM can through USB interface data storage to the USB memory device or through network interface with data transmission in remote computer.The ARM microcontroller is the master controller of whole device; Chip adopts the ARM9 microcontroller AT91RM9200 of atmel corp; 32 ARM chips that AT91RM9200 is a high performance-price ratio based on the ARM920T kernel, low-power consumption, volume is little; Support SDRAM, static memory, Burst Flash and NAND Flash, the peripherals that also integrated USB controller, ethernet controller, RTC, SPI etc. enrich.Power management wherein, SDRAM, FLAH and AT91RM9200 cooperate the embedded computer system of a boot and a minimum of embedded OS composition.Storer comprises FLASH and SDRAM, and communication module comprises computing machine wired network interface RJ45 and radio network interface.Through network interface, this device also can arrive PC terminal or mobile phone terminal to data transmission through the wired and wireless dual mode that ARM expands with the code stream of compression, and the user can carry out displaying live view, analysis, storage with the detection data that transmit.

The concrete course of work of native system is as shown in Figure 3, and the oil pipeline cylindrical shell is delivered to detection zone by the chassis of band turning rolls along track, and camera position is fixed, after X ray penetrates weld seam, by placing the image intensifier behind the weld seam to receive.Extract through video camera, image pick-up card is delivered to dsp chip and is handled after handling again; After in dsp chip, welded seam area being extracted, carry out defects detection again, after binary conversion treatment; Welded seam area is extracted out, with the speed and the efficient that improve detection algorithm.In treated weld image, can know the edge of seeing weld seam and the border circular areas in the welded seam area, this is the image appearance of weld defect just, adopts artificial intelligence approach can realize judging automatically the rank of defective according to examination criteria then.DSP is connected with host A RM through the HPI mouth.HPI (Host Port Interface HPI) is that TI company communicates by letter and custom-designed 16/32 bit width parallel interface with other MPIs in order to satisfy DSP.Host-processor can directly be visited the whole memory headroom of DSP through it.The HPI interface divides with regard to function, can be divided into two big types of data-interface and control interfaces.Data-interface is used for and the external host swap data, and HD [15-0] is the HPI data-interface; Control interface is responsible for the setting of register and the control of signal; The HPI interface provides three registers to main frame: address register (HPIA); Control register (HPIC) and data register (HPID) can be selected relevant register through HCNTL [1-0].The function of HHWIL is that the current data on the HPI bus of differentiation are a previous half-word or a back half-word.HR/W is the read-write control signal of HPI, is read operation during high level, is write operation during low level.HDS1 and HDS2 are HPI data useful signals.HCS is the chip selection signal of HPI interface.HRDY is the output signal of HPI, and low level representes that HPI is ready.HINT is an output signal, and HPI can interrupt main frame through this pin.According to the HPI interface principle, AT91RM9200 is as shown in Figure 2 with TMS320C6713 hardware connectivity scenario: the data line D0:15 of ARM is linked to each other with the data/address line HD0:15 of DSP; The HR/W, HCNTL1, HCNTL0 and the HHWIL control signal wire that are connected DSP with address signal line A4, A3, A2 and the A1 of ARM respectively; Be connected control signal wire HCS, HDS2, HDS1 and the HRDY of DSP respectively with ARM external bus interface control signal wire NCS2, NWR0, NRD and NWAIT, wherein HRDY needs connect NWAIT after the negate; The HINT signal wire of DSP is connected to the interruption pin IRQ0 of ARM.The HAS signal wire of DSP directly is pulled to high level with 10k resistance in design.Behind DSP compression one two field picture, deposit the bag of the NAL unit of image in the HPID storer in the location longways, then the called host terminal.Have no progeny during main frame receives and use the contact address access mode to read the HPID register, till the data of reading respective length, so far just accomplished once transmission, wait for that main frame interrupts next time.Main frame can also realize that wired and wireless dual mode transmits the data after encoding, and wired mode adds devices such as PHY through the built-in 10/100Mbps ethernet mac of AT91RM9200, realizes that through the RJ45 interface network connects; Wireless access adopts wireless communication module, and GPRS or 3G module realize the connection of network.Communicate between UART interface and the AT91RM9200 of wireless communication module through the support hardware Flow Control, the AT command set of accepting AT91RM9200 through UART starts radio communication and data transmission.

In sum, the present invention has that volume is little, low in energy consumption, processing speed is fast, be easy to integrated advantage; Adopt wavelet transformation technique to carry out feature extraction and can detect the defective edge feature in the radioscopic image effectively, the defect recognition technology in conjunction with artificial intelligence can improve the automatic identification efficiency of oil pipeline weld defect.

Claims

1. oil pipeline seam inspection intelligent checking system; Comprise seam inspection image capture module, communication module, edge extracting and detection dsp chip and ARM microcontroller, it is characterized in that: comprise the X ray transmitter in the said seam inspection image capture module and with realization the X ray seam inspection is gathered into digital defectogram picture with picture receiver; Be input to said edge extracting and detect in the dsp chip after converting digital signal by the defectogram image signal of said seam inspection image capture module output to through USB interface to realize that DSP handles; Said dsp chip links to each other with the ARM microcontroller, and said ARM microcontroller links to each other with memory device through USB interface respectively, is connected with the network equipment with radio network interface through wired.