CN202562852U

CN202562852U - Portable rock core image acquisition device

Info

Publication number: CN202562852U
Application number: CN2012202261055U
Authority: CN
Inventors: 张岩; 聂永丹; 胡庆; 李井辉; 赵建民
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

Provided is a portable rock core image acquisition device. The portable rock core image acquisition device mainly resolves the problems that an existing rock core scanner is large in size, inconvenient to carry and small in image compression ratio. The portable rock core image acquisition device is characterized in that a rock core image acquisition module, a storage module, a communication module, a digital signal processor (DSP) chip and an advanced RISC machine (ARM) microcontroller are fixed inside a shell body, wherein the rock core image acquisition module adopts a charge-coupled device (CCD) lens, an output end is connected with a data input end of the DSP chip through a universal serial bus (USB) interface, an image signal output end of the DSP chip is connected with a processing-waiting signal input end of the ARM microcontroller, the ARM microcontroller respectively outputs corresponding control signals to the storage module and the communication module and is connected with the storage module and the communication module using two-way data streams, so that the storage and communication state of the entire device are controlled through the ARM microcontroller, and the ARM microcontroller is connected with the storage module though a USB interface. The portable rock core image acquisition device has the advantages of being small in size and convenient to carry. Meanwhile, the hardware is allowed to adopt wavelet transform image compression technique to achieve higher compression efficiency.

Description

A kind of portable core image harvester

Technical field

The utility model relates to a kind of core image harvester that is applied in the oil-field development field tests.

Background technology

Along with the development of infotech, the improvement of image processing techniques and raising, the digitized image treatment technology is in the application of industry more and more widely.Present rock core scanning system mainly is to adopt the rock core scanner that core surface information is gathered; Be kept in the computing machine after forming core image; Image file is generally preserved with bitmap or JPEG compressed format, and general every width of cloth core image comprises googol usually according to amount.Under this pattern; Because field scale is limited, still can satisfy the needs of oil-field development, still in the past; Along with the expansion of oil-field development scale, the dispersion in oil field operation zone; Rock core quantity and kind rapidly increase, existing rock core scanning system obviously exist equipment volume big, be inconvenient to carry, core image coded format ratio of compression is low and image file takies the too much shortcoming of storage space, is difficult to satisfy the needs of actual oil-field development test.

Summary of the invention

The technical matters of mentioning in order to solve in the background technology; The utility model provides a kind of portable core image harvester; This kind image collecting device has the little portable advantage of volume; Because the structure of hardware allows to adopt the wavelet image compress technique, therefore can realize higher compression efficiency simultaneously.

The technical scheme of the utility model is: the portable core image harvester of this kind, comprise device case, and it is characterized in that: said housing internal fixation has core image acquisition module, memory module, communication module, dsp chip and ARM microcontroller; Wherein, The core image acquisition module adopts the CCD camera lens to realize that the rock core material object is gathered into the digital cores image; The output terminal of said core image acquisition module is connected to the data input pin of dsp chip through USB interface, to realize converting picture signal to digital signal; The image signal output end of said dsp chip is connected with the pending signal input part of ARM microcontroller; Said ARM microcontroller is respectively to the corresponding control signal of memory module and communication module output and adopt bidirectional traffic to be connected, to realize passing through the storage and the communications status of the whole device of ARM microprocessor controls; Said ARM microcontroller is connected with memory module through USB interface.

The utlity model has following beneficial effect: the portable core image harvester of this kind has that volume is little, low in energy consumption, processing speed is fast and be easy to integrated advantage.Simultaneously,, therefore, utilize this device can realize higher compression efficiency, be very beneficial for storage, analysis and the identification of core image data because constructed hardware configuration allows to adopt the wavelet image compress technique to replace dct transform compress technique in the past.

Description of drawings:

Fig. 1 is the structural representation of the utility model specific embodiment.

Fig. 2 is a crucial pin connection layout of showing AT91RM9200 chip and TMS320C6713 chip in the utility model specific embodiment.

Fig. 3 is the principle of work block diagram of the utility model.

Embodiment:

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

By shown in Figure 1, the portable core image harvester of this kind comprises device case, it is characterized in that: said housing internal fixation has core image acquisition module, memory module, communication module, dsp chip and ARM microcontroller; Wherein, The core image acquisition module adopts the CCD camera lens to realize that the rock core material object is gathered into the digital cores image; The output terminal of said core image acquisition module is connected to the data input pin of dsp chip through USB interface; To realize converting picture signal to digital signal, DSP carries out wavelet transformation earlier to transmitting the digital signal of coming, and re-uses the wavelet coding technology with core image compression back output; The image signal output end of said dsp chip is connected with the pending signal input part of ARM microcontroller; Said ARM microcontroller is respectively to the corresponding control signal of memory module and communication module output and adopt bidirectional traffic to be connected, to realize passing through the storage and the communications status of the whole device of ARM microprocessor controls; Said ARM microcontroller is connected with memory module through USB interface.ARM can link to each other with the network equipment to save and carry out data transmission through wired and wireless two kinds of network interfaces.

Combine like Fig. 1 shown in Figure 2, summary say that hardware logic structure comprises core image acquisition module, core image processing DSP chip, ARM microcontroller, core image storer and communication module.Wherein the core image acquisition module comprises that the CCD digital camera is first-class; What core image processing DSP chip adopted is the TMS320C6713 digital signal processor of TI company; On this platform, develop image processing programs such as image wavelet transform, wavelet coding compression algorithm; Be connected with host A RM through the HPI mouth after the processed compressed, 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.The core image storer comprises FLASH and SDRAM, and communication module comprises computing machine wired network interface RJ45 and radio network interface.Pass 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 decode the core image data that transmit and browse, analyzes, discerns, stores.

The concrete course of work of this device is following:

When core image collection, the work of code book device; Load module sends the DSP processing to after converting the core image that collects to digital signal; After in DSP, the digital signal that transmits being carried out wavelet transformation; Adopt wavelet coding to carry out the processed compressed system, can support to can't harm and diminish two kinds of compress modes according to the different quality needs.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, it is as shown in Figure 2 with TMS320C6713 hardware connectivity scenario to design AT91RM9200: 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.

The present invention has that volume is little, low in energy consumption, processing speed is fast, be easy to integrated advantage; Owing to adopt the wavelet image compress technique to replace dct transform compress technique in the past; This device can be realized higher compression efficiency, has higher compression efficiency through experiment showed, the image wavelet compression coding technology that this device adopts; Under the situation of lossless compress, can reach 1.5 times ratio of compression; In the situation of lossy compression method, can improve picture quality under the same ratio of compression, help the analysis and the identification of core image data.

Claims

1. a portable core image harvester comprises device case, it is characterized in that: said housing internal fixation has core image acquisition module, memory module, communication module, dsp chip and ARM microcontroller; Wherein, The core image acquisition module adopts the CCD camera lens to realize that the rock core material object is gathered into the digital cores image; The output terminal of said core image acquisition module is connected to the data input pin of dsp chip through USB interface, to realize converting picture signal to digital signal; The image signal output end of said dsp chip is connected with the pending signal input part of ARM microcontroller; Said ARM microcontroller is respectively to the corresponding control signal of memory module and communication module output and adopt bidirectional traffic to be connected, to realize passing through the storage and the communications status of the whole device of ARM microprocessor controls; Said ARM microcontroller is connected with memory module through USB interface.