CN202166715U

CN202166715U - Mine cable network on-line fault positioning system based on PCI-E technology

Info

Publication number: CN202166715U
Application number: CN 201120275873
Authority: CN
Inventors: 周大敏; 安文斗
Original assignee: CHINA COAL SCIENCE AND INDUSTRY GROUP CHONGQING RESEARCH INSTITUTE
Current assignee: CCTEG Chongqing Research Institute Co Ltd
Priority date: 2011-08-01
Filing date: 2011-08-01
Publication date: 2012-03-14
Anticipated expiration: 2021-08-01

Abstract

The utility model discloses a mine cable network on-line fault positioning system based on PCI-E technology, comprising a plurality of information collecting nodes and a data processing center, wherein the information collecting nodes are used for collecting the fault traveling wave signal of a cable to be detected, the collected information is output to a data processing center through a PCI-E port, the information collecting nodes have a PCI-E architecture, and comprises a high speed analog-to-digital conversion chip, a programmable gain amplifier and an FPGA chip, and the data processing center comprises a PCI-E switch and a micro processor. The mine cable network on-line fault positioning system based on PCI-E technology employs the advanced PCI-E high speed interconnection technology, the PCI-E switching technology and the fiber communication technology, the communication among all boards is based on a full PCI-E structure, the internal storage space of the front end data collecting equipment can be uniformly managed by a collecting receiving card, and the forwarding intervention of the CPU and the network protocol of a load are omitted thereby enabling the data transmission rate to be higher and the software overhead to be smaller, thereby enabling the whole system structure to be clearer and the downhole cable network fault on-line positioning of a mine to be effectively realized.

Description

The online fault location system of mine cable net based on the PCI-E technology

Technical field

The utility model relates to the data acquisition technology field, particularly a kind of online fault location system of mine cable net based on the PCI-E technology.

Background technology

All adopt cable power supply under the coal mine,, cause underground power supply used cable fault rate high, seriously influenced safe, the normal operation in colliery because down-hole special environmental conditions and mobile power-supply unit are more.

Because underground power supply used cable is shorter, the online localization of fault of cable generally adopts based on the capable ripple information of both-end, and key point that should technology is how to realize the synchronous acquisition of both end information.GPS information synchronization acquisition method is the common method of land cable localization of fault; The synchronized sampling principle of this method is: the oscillator that is made up of the high precision crystal oscillator can produce the clock signal that satisfies the sampling rate requirement through frequency division; Every separated 1s by the pulse per second (PPS) of GPS (PPS) signal Synchronization once; The forward position and the gps clock that guarantee the pulse signal that oscillator is exported are synchronous; Each device is all exported control data acquisition separately with the process clock signal synchronous of oscillator output as the employing pulse, and therefore sampling is synchronous, and GPS receiver process standard serial port passes to data collector with temporal information; Be used for to sampled data with " time tag ", to be used for the data transmission and to handle.But this method is because still there is deficiency in the precision of GPS own, add that GPS can't locate owing to often reach tens meters even rice up to a hundred under the coal mine deeply, so GPS information synchronization acquisition method is difficult to use.

Simultaneously, cable fault location commonly used all is that each information acquisition end all need dispose high performance information acquisition, processing to single cable, and if the downhole cable power supply network all is configured according to this pattern, cost is very high.Therefore be necessary to propose a kind of cable fault positioning system that has integrated advantage, is applicable to subsurface environment.

Summary of the invention

In view of this; The purpose of the utility model provides a kind of online fault location system of mine cable net based on the PCI-E technology; Based on optical-fibre channel, by the synchronizing information acquisition system that an information processing node, a plurality of independently information acquisition node constitute, can realize the On-line Fault location of the cable system under the coal mine through a kind of expeditiously.

The purpose of the utility model realizes through following technical scheme:

This kind comprises a plurality of information acquisition nodes and data processing centre (DPC) based on the online fault location system of mine cable net of PCI-E technology, and said information acquisition node is used to gather the voltage signal of cable under test, and exports data processing centre (DPC) to through the PCI-E port;

Said information acquisition node adopts the PCI-E framework; Comprise high speed analog-to-digital conversion chip, programmable gain amplifier and fpga chip; The voltage analog signal of cable under test is after programmable gain amplifier amplifies; Convert digital signal into through the high speed analog-to-digital conversion chip, and input to the FIFO buffer of fpga chip, realize that via the FPGA internal logic memory controller interface carries the buffer memory of the image data of internal memory in plate; And realize the direct read of long-range MCU to local DDR3 internal storage data through dma mode, will gather the back data and be uploaded to data processing centre (DPC) via optic module through the PCI-E output interface;

Said data processing centre (DPC) comprises PCI-E switch and microprocessor; Realize interconnected through PCI-E switch and distributed capture node; Image data is sent to after microprocessor handles; Send to host computer through the fiber optic Ethernet interface, said data processing centre (DPC) provides PCI-E system reference clock and AD to gather synchronous clock to the distributed information acquisition node, and the data acquisition of arbitrary information acquisition node is unified control and management by data processing centre (DPC).

Further, be provided with the chip for driving that is used to improve PCI-E transmission signals quality between the PCI-E output interface of said fpga chip and the optic module;

Further; Said data processing centre (DPC) also comprises the exterior storage hard disk; The mass storage interface of said exterior storage hard disk and microprocessor links, and said data processing centre (DPC) to hard disk, realizes the reliable memory of sampled data when big data quantity is gathered with the image data buffer memory;

Further, the said exterior storage hard disk SSD solid state hard disc that is the SATA interface;

Further, said information acquisition node is by the unified power supply of data processing centre (DPC), and the power cable of each information acquisition node and optical fiber are arranged in the concentric cable.

The beneficial effect of the utility model is:

1. the utility model is spread the characteristics of building according to downhole cable; Based on optical fiber transport channel; Constitute the synchronizing information acquisition system jointly by an information processing node, a plurality of independently information acquisition node, the system of the utility model adopts advanced PCI-E high speed interconnection technique, PCI-E switching technology and Fibre Optical Communication Technology, and full PCI-E structure is adopted in the communication between all integrated circuit boards; Front end data acquisition device interior storage space can be by gathering the receiving card unified management; Owing to removed the forwarding intervention of CPU and the procotol of load, make message transmission rate higher, software overhead is littler; And then make that system architecture is clear really, realize the On-line Fault location of the cable system under the coal mine expeditiously;

2. the whole acquisition management system of the utility model is realized by hardware as far as possible; The handling process of data adopts dma mode; From having reduced the participation of MCU to the full extent, guarantee the real-time of system bandwidth and system, make things convenient for data processing centre (DPC) that reading of image data moved;

3. the information acquisition node of native system can be expanded according to the down-hole needs, and its equipment debugging is simple, is fit to promote the use of.

Other advantages, target and the characteristic of the utility model will be set forth in instructions subsequently to a certain extent; And to a certain extent; Based on being conspicuous to those skilled in the art, perhaps can from the practice of the utility model, obtain instruction to investigating of hereinafter.The target of the utility model and other advantages can realize and obtain through following instructions and claims.

Description of drawings

For the purpose, technical scheme and the advantage that make the utility model is clearer, will combine accompanying drawing that the utility model is done further to describe in detail below, wherein:

Fig. 1 connects synoptic diagram for the hardware of information acquisition node;

Fig. 2 is that the hardware of data processing centre (DPC) connects synoptic diagram;

Fig. 3 is that the system that has 4 information acquisition nodes connects synoptic diagram.

Embodiment

Below will be with reference to accompanying drawing, the preferred embodiment of the utility model is carried out detailed description.Should be appreciated that preferred embodiment has been merely explanation the utility model, rather than in order to limit the protection domain of the utility model.

PCI Express bus (being the PCI-E bus) is a kind of a kind of brand-new bus specification of pci bus in the past that is different from fully; Share parallel architecture with pci bus and compare, PCI Express bus is a kind of point-to-point equipment connection mode connected in series, and point-to-point each PCI Express equipment that means all has oneself independently data connection; Data transmission concurrent between each equipment is independent of each other; And, can only have an equipment to communicate on the pci bus for the sort of shared bus mode of past PCI, in case the equipment that articulates on the pci bus increases; The actual transfer rate of each equipment will descend, and performance can not get guaranteeing.And PCI Express handles communication with point-to-point mode; Each equipment is set up the transmission channel of oneself separately when requiring to transmit data; Seal for this passage of other equipment, such operation has guaranteed the monopoly of passage, avoids the interference of other equipment.

Aspect transfer rate, PCI Express bus utilizes the connection characteristics of serial easily data rate to be mentioned a very high frequency, reaches the transfer rate that far exceeds pci bus.The interface of PCI Express is different and difference to some extent according to the bus bit wide; Comprise x1, x4, x8 and x16 (the x2 pattern will be used for internal interface but not the slot pattern); Wherein the transmission speed of X1 is 250MB/s, and X16 equals 16 times of speed to X1, promptly is 4GB/s.Meanwhile, PCI Express bus is supported the transmitted in both directions pattern, can also move full-duplex mode, and its two single worker connects the transfer rate and the quality that can provide higher, and the difference between them is similar with half-duplex and full duplex.Therefore each device that connects can use maximum bandwidth, and PCI Express interfacing equipment will have the resource that muchs more superior than PCI equipment to use.

The online fault location system of mine cable net based on the PCI-E technology of the utility model; Comprise a plurality of information acquisition nodes and data processing centre (DPC); Wherein, the information acquisition node is used to gather the voltage signal of cable under test, and exports data processing centre (DPC) to through the PCI-E port;

As shown in Figure 1; The information acquisition node adopts the PCI-E framework; Comprise high speed analog-to-digital conversion chip, programmable gain amplifier and fpga chip, the voltage analog signal of cable under test converts digital signal into through the high speed analog-to-digital conversion chip after programmable gain amplifier amplifies; And input to the FIFO buffer of fpga chip; Realize that via the FPGA internal logic memory controller interface carries the buffer memory of the image data of internal memory in plate, and realize the direct read of long-range MCU, will gather the back data and be uploaded to data processing centre (DPC) via optic module through the PCI-E output interface to local DDR3 internal storage data through dma mode; In the present embodiment,, be provided with chip for driving between the PCI-E output interface of fpga chip and the optic module, be used to improve PCI-E transmission signals quality for increasing the driving force of PCI Express signal.

As shown in Figure 2; Data processing centre (DPC) comprises PCI-E switch and microprocessor (MPC83XX); Realize interconnectedly through PCI-E switch and distributed capture node, image data is sent to after microprocessor handles, send to host computer through the fiber optic Ethernet interface; Said data processing centre (DPC) provides PCI-E system reference clock and AD to gather synchronous clock to the distributed information acquisition node, and the data acquisition of arbitrary information acquisition node is unified control and management by data processing centre (DPC).

Data processing centre (DPC) also comprises the exterior storage hard disk; The mass storage interface of said exterior storage hard disk and microprocessor links; Said data processing centre (DPC) to hard disk, realizes the reliable memory of sampled data when big data quantity is gathered with the image data buffer memory.In the present embodiment; The exterior storage hard disk is the SSD solid state hard disc of SATA interface; Thereby make full use of solid state hard disc start fast, read postpone little, writing speed fast, the heating is little, advantages such as mechanical fault greatly, can not take place for noiselessness, working range, makes it to satisfy the needs of underground work.

As further improvement, for reliability and the servicing ease that total system is implemented, the remote collection node is by the unified power supply of data processing centre (DPC), and supply lines and 4 optical fiber are bundled in the concentric cable, thereby are convenient to system maintenance.As shown in Figure 3; Information acquisition node of the utility model and data processing centre (DPC) have all adopted the structure of integrated integrated circuit board; Wherein the PCI-E output interface of information acquisition node comprises PCI-E signal output port, PCI-E receiver port and PCI-E system reference clock port, and the PCI-E output interface of each road fpga chip, PCI-E receiver port and PCI-E system reference clock port be the structural PCI-E receiver port of corresponding data processing enter integrated circuit board, PCI-E signal output port and PCI-E system reference clock port respectively;

Through unified PCI Express reference clock is provided by data processing centre (DPC); Guarantee that the PCI-E of system work in unity is under a clock; Simultaneously; The information acquisition node has AD and gathers synchronous clock, and synchronous clock provides (both corresponding interfaces promptly scheme in ADC Start Reference Clock) by data processing centre (DPC), guarantees that total system is operated under the unified clock.

According to system's needs, native system can form the expansion of specific quantity acquisition node through selecting PCI-E exchange chip model for use.Its expansion is very convenient.

Need to prove that Fig. 1, Fig. 2, Fig. 3 are the universal stand composition of this area, the English name among its figure is the known title of this area, and the purpose of quoting Fig. 1-Fig. 3 is an explanation feasibility of the present invention.In the present invention, made creative application, and be not to be simply piling up and piecing together of prior art to the concrete characteristics of down-hole.

Explanation is at last; Above embodiment is only unrestricted in order to the technical scheme of explanation the utility model; Although with reference to preferred embodiment the utility model is specified, those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement the technical scheme of the utility model; And not breaking away from the aim and the scope of present technique scheme, it all should be encompassed in the middle of the claim scope of the utility model.

Claims

1. based on the technological online fault location system of mine cable net of PCI-E; It is characterized in that: said system comprises a plurality of information acquisition nodes and data processing centre (DPC); Said information acquisition node is used to gather the voltage signal of cable under test, and exports data processing centre (DPC) to through the PCI-E port;

2. the online fault location system of mine cable net based on the PCI-E technology according to claim 1 is characterized in that: be provided with the chip for driving that is used to improve PCI-E transmission signals quality between the PCI-E output interface of said fpga chip and the optic module.

3. the online fault location system of mine cable net based on the PCI-E technology according to claim 1 and 2; It is characterized in that: said data processing centre (DPC) also comprises the exterior storage hard disk; The mass storage interface of said exterior storage hard disk and microprocessor links; Said data processing centre (DPC) to hard disk, realizes the reliable memory of sampled data when big data quantity is gathered with the image data buffer memory.

4. the online fault location system of mine cable net based on the PCI-E technology according to claim 3 is characterized in that: the SSD solid state hard disc that said exterior storage hard disk is the SATA interface.

5. the online fault location system of mine cable net based on the PCI-E technology according to claim 1; It is characterized in that: said information acquisition node is by the unified power supply of data processing centre (DPC), and the power cable of each information acquisition node and optical fiber are arranged in the concentric cable.