EP1653371A2 - Elektronisches System zur Übertragung digitaler Daten ausschließlich in Echtzeit - Google Patents

Elektronisches System zur Übertragung digitaler Daten ausschließlich in Echtzeit Download PDF

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Publication number
EP1653371A2
EP1653371A2 EP05110184A EP05110184A EP1653371A2 EP 1653371 A2 EP1653371 A2 EP 1653371A2 EP 05110184 A EP05110184 A EP 05110184A EP 05110184 A EP05110184 A EP 05110184A EP 1653371 A2 EP1653371 A2 EP 1653371A2
Authority
EP
European Patent Office
Prior art keywords
card
data
acquisition
unit
remote
Prior art date
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.)
Withdrawn
Application number
EP05110184A
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English (en)
French (fr)
Other versions
EP1653371A3 (de
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GILARDONI SpA
Original Assignee
GILARDONI SpA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by GILARDONI SpA filed Critical GILARDONI SpA
Publication of EP1653371A2 publication Critical patent/EP1653371A2/de
Publication of EP1653371A3 publication Critical patent/EP1653371A3/de
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/003—Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto
    • G09G5/006—Details of the interface to the display terminal
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/001—Arbitration of resources in a display system, e.g. control of access to frame buffer by video controller and/or main processor
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/003—Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto
    • G09G5/005—Adapting incoming signals to the display format of the display terminal

Definitions

  • the present invention relates to an electronic system for the transfer of digital data strictly in real time between a data source and a data processing and/or display unit.
  • the present invention relates to an electronic transfer system of digital data which makes use of a known communication protocol such as USB (Universal Serial Bus).
  • a known communication protocol such as USB (Universal Serial Bus).
  • USB digital communication protocol
  • the known digital communication protocol USB was introduced for providing a standard which could surpass the performances of traditional serial, parallel ports; USB is therefore an ideal solution for medium-speed peripheral devices such as external ISDN modems, webcams in general, external CD-Rom players etc.
  • the USB protocol also offers two further important characteristics: the possibility of connecting peripheral devices with the PC already switched on and directly providing the feeding to various types of peripherals.
  • the present invention is linked to synchronized transmission techniques of digital data and has been developed parallel to an data transmission application obtained from systems using X-ray sources, to obtain the identification of objects subjected to said rays with particular reference to the materials of which said objects are made.
  • a data display is required in real time on a display station. If the system is used with a variable scanning rate, in order to preserve space resolutions, the transmission system must be capable of having a variable transmission rate. A correct handling of the data also requires the possibility of equalizing the values received and this can be obtained by providing the possibility of modifying the signal level directly on analogical inputs.
  • the Applicant considered the problem of making the information flow coming from an X-ray scanning unit of an object in which the data flow arrives with a pre-established temporization, compatible with a processing and display unit which processes and creates images starting from said data flow.
  • the Applicant has produced a synchronous data transfer protocol, strictly in real time, through USB communication ports and a specific synchronization signal which start from the processing unit and arrive at the acquisition or scanning unit.
  • the necessity for synchronization derives from the fact that the input data, suitably processed, are displayed strictly in real time on a display unit.
  • the system must not only be synchronized with the display unit but must also operate with a variable transmission rate, on the basis of the operative configuration and this transmission rate must be able to be modified in real time; a bidirectional transmission capacity must be guaranteed for allowing both the acquisition parameters and regulation of the return of the amplifiers situated in the scanning and acquisition system, to be established.
  • the system also guarantees a transmission capacity in the configuration in which there are amplifiers positioned up to various metres from the transmission system.
  • One of the aspects of the present invention relates to an electronic system for the transfer of digital data strictly in real time between an acquisition unit of digital images from which the data flow arrives with a pre-established temporization, and a processing unit including a display unit of said images characterized in that it comprises at least one electronic data transfer card strictly in real time situated between the acquisition unit and the processing unit, which receives the data from said acquisition unit and which synchronizes them in real time by means of a synchronization signal generated by said processing unit and transfers said data to the display unit by means of a USB communication.
  • the electronic system comprises a digital image acquisition unit, such as, for example, an X-ray scanning unit 2 for at least one object B, which in figure 1 is illustratively represented by a piece of luggage.
  • a digital image acquisition unit such as, for example, an X-ray scanning unit 2 for at least one object B, which in figure 1 is illustratively represented by a piece of luggage.
  • the scanning unit 2 comprises at least one X-ray source 21, a detection structure 22 of the radiations emitted from said source and a support 23 for sustaining and/or moving said objects.
  • Said structure 22 is suitable for generating at least one digital X-ray image of each object which is situated on said support 23.
  • the X-ray image detection structure envisages the presence of at least two separate sensor units, each comprising a series of photodiodes parallel to each other, separated by a metallic filter, each unit being suitable for detecting a pre-established spectral distribution of said rays.
  • each sensor unit supplies an X-ray image relating to a different energy spectrum.
  • These images and the data associated therewith are indicated hereunder as high energy images (H) and low energy images (L).
  • Said process unit comprises a calculation unit 31 and a display unit 32, typically comprising at least one video.
  • Said processing unit generates at least one resulting image in which each specific characteristic of the material or object analyzed in general, is shown in a distinguishable manner.
  • At least one electronic data transfer card 4 situated between the acquisition unit and the processing unit effects the synchronized transmission in real time of the data associated with the images to be visualized in said display unit.
  • the present invention relates to the use of this type of protocol on a data acquisition card having at least a pair of small local buffers (for example having a dimension of a few tens of KByte) and an external synchronism signal, supplied for example by the display unit equipped with an operative system of the hard real time type.
  • a data acquisition card having at least a pair of small local buffers (for example having a dimension of a few tens of KByte) and an external synchronism signal, supplied for example by the display unit equipped with an operative system of the hard real time type.
  • the synchronized and programmable transmission is preferably effected by synchronization impulses having frequencies with typical values of the video systems based on Personal Computers.
  • Said remote electronic card effects the acquisition and communicates the data to the USB card with specific digital lines.
  • the remote card comprises a first series of optical sensors s1, for example 64 sensors, belonging to a first channel and a second series of optical sensors s2, belonging to a second channel; each channel envisages the presence of a digital analogical converter ad1 and ad2.
  • the functioning of the remote card is controlled by a programmable device 41 which, upon receiving a "Start Acquisition” signal, activates the card circuits for sequentially scanning the optical sensors, for example starting from sensor number 1 to sensor number 64; the scanning is preferably effected contemporaneously on both channels. At the end of the scanning of the last optical sensor, if the "Start Acquisition" signal (Start_Acquisition in figure 3) is still active, the conversion cycle is restarted.
  • the converted data are electrically insulated and sent to a data collector card.
  • This collector card communicates with a USB or USB 2.0 connection controller of the display unit so as to appropriately send the data received from each remote card to said unit.
  • Said remote card also comprises a feeding circuit 42, an insulation block 43 and a piloting circuit 44 for the output of the two transmission channels and for the input of the start acquisition signals.
  • the system according to the present invention acquires, for each synchronization impulse, the digital data coming from the remote cards 4 with electric transmission protocol with the low voltage remote cards of the differential type, and with specific functional protocol.
  • the data transmission rate is variable and ensures a transmission capacity higher than several tens of Mbit/sec (in the case of the use of USB 2.0 protocol).
  • said electronic card allows, by means of this synchronization signal, a non-synchronized communication protocol, such as, for example, the USB 2.0 communication protocol.
  • the duration of the scanning of the 64 optical sensors can be set within a time range of 0.100 msec to 1,000 msec, whereas the maximum distance between the remote card and the data collector can reach a distance of about nine metres.
  • Each remote card is connected with the collector card by means of differential signals: ("Channel Nr. 1" as Output, "Channel Nr. 2" as Output and the above-mentioned “Start Acquisition” as Input.
  • the collector card can receive a series of remote cards, for example up to twenty remote cards. Each connection with the remote card corresponds, on the collector card, to a specific input.
  • the system according to the present invention ensures the generation, towards each remote card, of a programmable number of acquisitions, per synchronization impulse, so that various acquisitions can correspond to each synchronization impulse.
  • Figure 3 shows the external synchronization signal Ext-Synch, the start acquisition signals for each channel (Start_Acquisition) and the data transfer packages for each channel synchronized by the above synchronization signal.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Multimedia (AREA)
  • Memory System Of A Hierarchy Structure (AREA)
  • Communication Control (AREA)
EP05110184A 2004-11-02 2005-10-31 Elektronisches System zur Übertragung digitaler Daten ausschließlich in Echtzeit Withdrawn EP1653371A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITMI20042087 ITMI20042087A1 (it) 2004-11-02 2004-11-02 Sistema elettronico per il trasferimento rigidamente in tempo reale di dati digitali

Publications (2)

Publication Number Publication Date
EP1653371A2 true EP1653371A2 (de) 2006-05-03
EP1653371A3 EP1653371A3 (de) 2007-10-31

Family

ID=35840116

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05110184A Withdrawn EP1653371A3 (de) 2004-11-02 2005-10-31 Elektronisches System zur Übertragung digitaler Daten ausschließlich in Echtzeit

Country Status (2)

Country Link
EP (1) EP1653371A3 (de)
IT (1) ITMI20042087A1 (de)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6184936B1 (en) * 1997-10-06 2001-02-06 Sigma Designs, Inc. Multi-function USB capture chip using bufferless data compression
US6473078B1 (en) * 1999-05-26 2002-10-29 Nokia Display Products Oy Method and device for power consumption management of an integrated display unit
KR100378916B1 (ko) * 2000-08-14 2003-04-08 탑헤드 주식회사 주화면과 보조화면으로 구성된 이중 모니터를 이용한컴퓨터의 ｔｖ 화면 표시 시스템
TWI229808B (en) * 2002-10-25 2005-03-21 Magic Control Technology Corp Interface conversion device for USB to VGA

Also Published As

Publication number Publication date
ITMI20042087A1 (it) 2005-02-02
EP1653371A3 (de) 2007-10-31

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