EP1869538A1 - Terminal client leger et systeme client-serveur comportant un tel terminal - Google Patents

Terminal client leger et systeme client-serveur comportant un tel terminal

Info

Publication number
EP1869538A1
EP1869538A1 EP05792409A EP05792409A EP1869538A1 EP 1869538 A1 EP1869538 A1 EP 1869538A1 EP 05792409 A EP05792409 A EP 05792409A EP 05792409 A EP05792409 A EP 05792409A EP 1869538 A1 EP1869538 A1 EP 1869538A1
Authority
EP
European Patent Office
Prior art keywords
thin
data
client terminal
client
server
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.)
Ceased
Application number
EP05792409A
Other languages
German (de)
English (en)
Inventor
Achim Rausenberger
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.)
Pepperl and Fuchs SE
Original Assignee
Pepperl and Fuchs SE
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 Pepperl and Fuchs SE filed Critical Pepperl and Fuchs SE
Publication of EP1869538A1 publication Critical patent/EP1869538A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/18—Packaging or power distribution
    • G06F1/181—Enclosures
    • G06F1/182—Enclosures with special features, e.g. for use in industrial environments; grounding or shielding against radio frequency interference [RFI] or electromagnetical interference [EMI]
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2200/00—Indexing scheme relating to G06F1/04 - G06F1/32
    • G06F2200/16—Indexing scheme relating to G06F1/16 - G06F1/18
    • G06F2200/163—Indexing scheme relating to constructional details of the computer
    • G06F2200/1631—Panel PC, e.g. single housing hosting PC and display panel

Definitions

  • the invention relates to a thin client terminal with a programmable graphic EDP device having its own memory and computing capacity, and a client-server system with at least one such terminal.
  • Thin Client refers to a computer application or computer as the terminal of a network whose functional equipment is limited to input and output.
  • the Thin Client stands between the concept of Fat Client and the Ultra Thin Client.
  • the thin client can obtain its data and its application programs completely from a server.
  • the thin client itself is not equipped with a hard disk, in particular its computing capacity is relatively low.
  • the thin client conceptually is the return of the terminal in the so often PC-based computing environment.
  • the thin client can be equipped with a relatively slow processor with little RAM and integrated graphics card for an extremely minimalist workstation.
  • the clock frequency of thin clients is typically below 1GHz.
  • the thin client is set up to play only the output of the started programs, which are started and executed on the server.
  • the mouse and keyboard inputs are sent from the thin client via a protocol to the server, and this sends the output of the programs back to the thin client, so that only the output, but not the execution of these programs on the thin client.
  • hazardous area When working in potentially explosive atmospheres (abbreviated to "hazardous area” in the following), eg for operating, controlling or monitoring hazardous area processes, computer support is generally required.
  • the Ex-area measurements can be made by sensors, which are evaluated by means of a computer and then for a person working in the Ex area to be visibly displayed on a display or graphically displayed.
  • this person it is further necessary for this person to be able to input data into the computer in response to the displayed data, eg via a keyboard or mouse.
  • the resulting data flow between the hazardous area and the safe area is often very large.
  • the amount of data to be transmitted per unit of time via the lines from the computer to the monitor often reaches such great proportions in practice, in particular in real-time operation-typically a data transmission rate of, for example, 1... 4 Gbit / s-that lines of high bandwidth, such as, for example, optical waveguides Transmission must be used.
  • the invention is therefore based on the object to avoid the disadvantages mentioned or at least significantly reduce.
  • the object is achieved by a thin client terminal for
  • Connected arranged as a server computer is connected and is able to communicate with this according to the client-server principle as a thin client, and a connected to the computer equipment display for displaying data, the thin client terminal explosion-proof or intrinsically safe and thus can be used in the hazardous area.
  • compressed data is transmitted via the data transmission channel in at least one direction, ie the communication via the data transmission channel consists of at least one, preferably in both directions in the transmission of compressed data.
  • the thin client terminal according to the invention is thus able to receive compressed data from the computer via the data transmission channel and / or to send compressed data to the computer. Furthermore, at least a part of the data in the EDP device is subjected to arithmetic operations. The data entering the EDP device are thus at least partially changed according to the invention there.
  • the thin client terminal preferably further comprises an explosion-proof or intrinsically safe keyboard connected to the computer device for inputting data.
  • A3 The thin-client terminal may have an explosion-proof or intrinsically safe barcode reader connected to the computer equipment for entering data.
  • the thin-client terminal preferably has an explosion-proof or intrinsically safe mouse connected to the EDP device for inputting data and / or at least one other pointing device connected to the EDP device, explosion-proof or intrinsically safe pointing device, eg trackball, finger mouse or Touchpad, to enter data on.
  • explosion-proof or intrinsically safe mouse connected to the EDP device for inputting data
  • explosion-proof or intrinsically safe pointing device eg trackball, finger mouse or Touchpad
  • the computer device preferably has a microprocessor or microcontroller.
  • the clock frequency of the microprocessor or microcontroller may be less than 5 gigahertz or less than 2 gigahertz or less than 1 gigahertz or less than 800 megahertz or less than 100 megahertz.
  • the computer equipment can have its own graphics processor.
  • the display is preferably an explosion-proof or intrinsically safe flat screen.
  • the display may be an explosion-proof or intrinsically safe touch-screen, via which data can be entered into the EDP device.
  • the EDP device preferably has at least one memory chip or other magnetic disk-free memory. Such memories are presently advantageous because their energy consumption is low and because they have no rotating parts that could promote sparking.
  • the entire thin client terminal is operable with low voltage of 24 volts or less, for example with a voltage of 24V or 12V or 5V. Preferably, it has no power supply for connection to the 230V power grid.
  • graphic data is processed and displayed on the display, wherein preferably all displayed on the display data, if it is compressed data, directly from the computer device unpacked or decompressed and output to the display, eg without involving the computer or server.
  • the program required for data processing or graphic design in the EDP device can first of all be downloaded from the computer.
  • This graphic may e.g. visualize the current state of a system running in the Ex area and, for example, additionally be animated to facilitate intuitively acquiring the graphic content to a person operating or controlling the facility.
  • the aid of the invention it is possible to generate the graphic information in the EDP device from a compressed file supplied by the computer or from relatively few basic data supplied by the computer and, for example, to send it to the monitor via a short parallel cable.
  • the required data stream from the computer or server to the thin client terminal is thus considerably reduced in a client-server system according to the invention.
  • the data, in particular graphics data, directly on the display can be displayed, for example, without the need for further data transfer from or to the computer.
  • the thin client terminal at least a portion of that data can be processed, which conventionally must first be routed to the computer and thus to the outside of the hazardous area in order to be processed there, whereby the data stream between server and terminal Client terminal is also reduced.
  • the EDP device therefore preferably has at least one interface for connecting a sensor, so that a sensor arranged in the Ex area can be connected directly to the EDP device and thus the data supplied by the sensor is not initially outside the Ex area must be led.
  • the cabling effort and the data flow between the hazardous area and the safe area are reduced even further.
  • One possibility is to perform data reduction in the computer equipment within the Ex area, e.g. by averaging out numerous individual values provided by the sensors, and forwarding only the data thus reduced over the communications channel to the outside of the domain.
  • all inputs e.g. those via the keyboard or the mouse, are processed directly in the computer equipment, without involving the computer.
  • data may be stored in a memory in the computing device or buffered without sending data to the computer.
  • the data transmitted via the data transmission channel consist at least in part of such data, which is merely the change of a already existing state, for example, a specific screen presentation concern.
  • data does not therefore contain the complete information for the production of a specific state, such as a specific screen display, but only the much less comprehensive information for the mere modification or updating of the existing state.
  • a specific state such as a specific screen display
  • the changed number that is, advantageously only a small amount of data is transmitted.
  • an information "state otherwise maintained unchanged” can be transmitted.
  • the display state of the screen only changes with respect to this one number, while the display state otherwise remains unchanged.
  • the data stream to be transmitted between the hazardous area and the safe area is thus substantially reduced.
  • a reduction of the data stream by a factor of 10,000 or more can be readily achieved by means of the invention. This allows for a reduction in transmission bandwidth between the thin-client terminal and the computer, and in many cases even the use of conventional wireways to transmit this data stream instead of coaxial or fiber optic cables.
  • the computer equipment is designed to save energy as possible to keep the dissipated power in the Ex area as small as possible. Preference is therefore given to all components that are not mandatory for the operation of the computer equipment, omitted.
  • the computer device is preferably equipped with a CPU with only low heat development, so that a CPU fan is superfluous. Therefore, using a CPU with a low clock frequency of eg below 1 GHz or even below 100 MHz can be advantageous.
  • the computing capacity is preferably chosen as small as possible.
  • the power consumption of the computer device is preferably less than 50 watts, preferably less than 10 watts, more preferably less than 1 watts.
  • the remote desktop protocol (RDP) technology implemented in Windows is preferably used. The typical application for this is the remote maintenance of PCs via a network.
  • the client logs on to the server by an IP address is specified and authenticated by the USERNAME and PASSWORD. This technique can be used according to the invention for operating or remote control of the computer.
  • the object is further achieved by a client-server system with a server and at least one connected to this thin client, the thin client is an inventive thin client terminal of the type described above for use in a hazardous area and therefore in a potentially explosive area can be used.
  • the thin client terminal according to the invention can thus be part of a client-server system according to the invention, in which the computer acts as a server and the thin client terminal as a thin client.
  • the explosion-proof or intrinsically safe thin-client terminal according to the invention can be the only client of the computer or server. Alternatively they are Several explosion-proof or intrinsically safe thin-client terminals connected to the server.
  • the computer or server need not be explosion-proof or intrinsically safe, as it is not used in potentially explosive atmospheres, also referred to as "hazardous areas".
  • the data transmission channel consists in the simplest case of only one forward conductor and one return conductor.
  • the data transmission channel is a DSL or an ISDN link or the data transmission channel has at least one asynchronous serial interface.
  • the data transmission channel allows a maximum data transmission rate of between 100 kbit per second and 100 megabits per second, preferably 115,200 bits per second or between 1 megabit and 8 megabits per second.
  • A16 According to an embodiment of the client-server system according to the invention, a plurality of thin-client terminals according to the invention of the type described above are connected to the server.
  • the EDP device receives a certain maximum amount of basic data from the server per unit of time, thereby generating and transmitting to the display a quantity of graphics data per unit of time, which is more extensive in the time average as the amount of basic data received from the server per unit time from the computing device.
  • the quantity of graphic data generated per unit of time and output to the display is preferably greater in the time average by at least a factor of 10 than the amount of basic data received by the IT device per unit time from the server.
  • the EDP device receives a specific maximum amount per unit of time from the keyboard and / or the mouse and / or the bar code reader and / or one or a plurality of sensors connected to the EDP device from raw data, whereby it generates from this per unit time a lot of processed data and outputs to the server, which is less extensive in time, preferably on average by at least a factor 10 is less extensive than that per unit time of the computer equipment received amount of raw data.
  • the computer device and the computer are capable of communicating in at least one direction by means of a multiplex signal, i. a composite signal for transmitting two or more signals belonging to different logical channels over a single common physical channel.
  • a multiplexer is used to produce a multiplex signal, which successively reads in the signals belonging to the logical channels in cyclical sequence and transmits them via the common channel.
  • FIG. 1 for further illustrating the prior art, a conventional arrangement with a monitor, a keyboard, a
  • 3 shows a client-server system according to the invention with a thin client
  • Terminal with the monitor, the keyboard, the barcode reader and the
  • the mouse of Figure 1 all of which are connected to an EDP device located in the thin client terminal connected to the computer of Figure 1, and
  • FIG. 4 shows a client-server system according to the invention with a thin-client
  • Terminal with the monitor, the keyboard, the bar code reader and the mouse of Figure 1, which are all connected to an arranged in the thin client terminal computing device to which in addition the sensors of Fig. 1 are connected and which with connected to the computer of Fig. 1.
  • Figure 1 serves to further illustrate the prior art and shows a monitor 12, a keyboard 13, a bar code reader 15, a mouse 14 and six sensors S, all located in a e.g. by explosive gas or explosive dust explosive area ExB and are connected in a conventional manner to a computer arranged outside the same.
  • Ex area ExB The potentially explosive area ExB, called Ex area ExB for short, is separated by a partition wall T from the non-potentially explosive outside world, which is referred to here as safe area SiB.
  • All components 12, 13, 14, 15, S located within the Ex-area are explosion-proof or intrinsically safe according to a specific protection class in the proper manner, otherwise they may not be used in hazardous areas. All mentioned components are connected via likewise explosion-proof or intrinsically safe lines L to a computer C set up in the safe area SiB. The cabling effort is therefore high.
  • the sensors S continuously provide data to the computer C.
  • the mouse 14 and the bar code reader 15 input data transfer the computer C.
  • the latter processes the incoming data and creates data or graphics derived therefrom, which are displayed in real time on the monitor 12, for example by a person working in the Ex area to control or monitor processes that take place in the explosive area or to operate an in-field Ex-area to allow running plant.
  • Fig. 2 shows a further illustration of the prior art, an arrangement which is compared to that of Figure 1 modified in that the connection from the computer C to the monitor 12, the keyboard 13, the bar code reader 15 and the mouse 14 via two KVM interfaces 16,17 and a multiplex connection 18 is made, where the abbreviation KVM means "keyboard video mouse".
  • KVM means "keyboard video mouse”.
  • This connection is used exclusively for data transmission by multiplexing, wherein depending on the direction of transmission, the KVM interface 16 acts as a multiplexer and the KVM interface 17 as a demultiplexer or vice versa.
  • the data itself in particular data content, data volume and data format, are not changed here;
  • the KVM interfaces 16, 17, the data is not subjected to logical operations, arithmetic operations to no compression or decompression.
  • Such KVM interfaces are not intended and incapable of such operations which modify the data or their format.
  • the transmission over the multiplex line 18 is broadband.
  • FIG. 3 shows, according to an embodiment of the invention, a thin-client terminal 1 according to the invention, which comprises the monitor 12, the keyboard 13, the mouse 14 and the barcode reader 15 of FIG. 1 as well as an EDP device 11.
  • the monitor 12, the keyboard 13, the mouse 14 and the barcode reader 15 are in contrast to FIG. 1 according to the invention no longer connected directly to the computer C, but to the computer device 11 having corresponding (not shown) interfaces.
  • the EDP device 11 is according to the invention programmable by software, graphics capable and has its own memory and computing capacity and is thus able to process incoming data.
  • the memory used in this case are preferably magnetic disk-free in order to avoid rotating parts and sparking and to keep the power loss small.
  • the computing capacity can be realized in particular by using a microprocessor.
  • the graphics capability can be realized in particular by its own graphics processor or a graphics card.
  • the data entering the EDP device 11 are at least partially changed by undergoing arithmetic operations and at least partially compressing them; Likewise, they may be subjected to logical operations and / or format changes and / or averaged and / or filtered there. This can e.g. especially for the data flow in the direction from the thin client terminal 1 to the computer C; According to one variant, this only applies to the data flow in the direction from the thin client terminal 1 to the computer C.
  • the thin-client terminal 1 is completely explosion-proof or intrinsically safe, including all the input and output devices 12, 13, 14, 15 and the EDP device 11, and can thus be used in the potentially explosive area ExB.
  • the thin-client terminal 1 is low-voltage up to 50V, e.g. 12V or 24V, operable, so that its operation no sparks promoting high voltage is required.
  • a single line K which forms a data transmission channel K
  • the EDP device 11 is connected to the serving as a server computer C, with which the thin client terminal 1 after the client-server Principle is able to communicate.
  • the server C is arranged outside the ExBereichs ExB in the so-called safe area SiB.
  • the data transmission via the line K is preferably narrowband;
  • all components for data transmission between the EDP device 11 and the computer C can be designed from the outset in a self-contained fashion.
  • the data or values supplied by the sensors S are, as in the arrangement of FIG. 1, conducted via lines L to the computer C and processed there in a specific manner.
  • the results or data derived therefrom should be displayed on the monitor 12 e.g. in real time as a graphic for display, possibly in response to inputs via the keyboard 13, the mouse 14 or the bar code reader 15.
  • This graphic can be e.g. Visualize the current state of a system running in the Ex area and, for example, additionally be animated to facilitate intuitively acquiring the graphic content to a person operating or controlling the facility.
  • the graphic data to be displayed for example, from relatively few basic data supplied by the server C, for example via the data transmission channel K, in the EDP device 11 itself and, for example, to send it via a short parallel cable to the monitor 12 the graphics data thus obtained are considerably more extensive than the basic data supplied by the server C, in each case based on the time unit.
  • the required data flow via the line K into the Ex area ExB is therefore considerably reduced.
  • the necessary for this purpose in the IT device 1 program can be downloaded via the line K or another channel from the server C, for example.
  • the basic data may e.g. compressed graphic data or purely numerical information e.g. be of measured values, which serve as the basis for an extensive on the monitor 12 to be generated by the computer device 11 to be generated.
  • the graphic data generated by the computer equipment from the basic data and output to the monitor can be e.g. by a factor of 10 to 100,000 more extensive, in each case based on the time unit.
  • FIG. 4 shows, according to a further embodiment of the invention, an inventive thin-client terminal 1 1 , which differs from the thin-client terminal 1 of FIG. 3 only in that instead of the EDP device 11, it is an EDP device 11 '.
  • the six sensors S are not connected to the server C but directly to the EDP device 11 '. This is connected via the line K to the server C.
  • the EDP device 11 ' first downloads a graphics and / or data processing program from the server C via the line K, by means of which the EDP device 11' subsequently loads the data from the sensors S and possibly from the input components (keyboard 13, mouse 14, barcode reader 15) read outgoing data and processed into graphics data, which are displayed on the monitor 13, without any further data exchange with the computer C takes place.
  • the data stream via the line K is therefore advantageously further reduced.
  • a reduction of the data flow from the Ex area into the computer C or vice versa can be achieved by a factor of 10,000 to 100,000.
  • the invention is industrially applicable, for example in the field of chemistry, petrochemistry, the promotion, storage and processing and transport of gas and oil, as well as in the food industry.

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Computer Hardware Design (AREA)
  • Power Engineering (AREA)
  • User Interface Of Digital Computer (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Information Transfer Between Computers (AREA)

Abstract

L'invention concerne un terminal client léger (1,1') destiné à être utilisé dans une zone à risque d'explosion (ExB) et présentant au moins les composants suivants: un dispositif informatique graphique (11,11') programmable au moyen d'un logiciel, comportant sa propre capacité de mémorisation et de calcul, connecté, par l'intermédiaire d'au moins un canal de transmission de données (K), à un ordinateur (C) qui fait office de serveur et qui n'est pas placé dans la zone à risque d'explosion (ExB), ledit dispositif pouvant communiquer en tant que client léger avec cet ordinateur selon le principe client-serveur; et un écran (12) connecté au dispositif informatique (11, 11 ') et servant à l'affichage de données. Ce terminal client léger (1,1') est protégé contre les explosions ou à sécurité intrinsèque et peut ainsi être utilisé dans la zone à risque d'explosion (ExB). De préférence, ce terminal client léger (1,1 ') présente en outre un clavier (13), protégé contre les explosions ou à sécurité intrinsèque, connecté au dispositif informatique (11,11') et servant à l'entrée de données.
EP05792409A 2005-04-08 2005-09-17 Terminal client leger et systeme client-serveur comportant un tel terminal Ceased EP1869538A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202005005702 2005-04-08
PCT/DE2005/001638 WO2006105743A1 (fr) 2005-04-08 2005-09-17 Terminal client leger et systeme client-serveur comportant un tel terminal

Publications (1)

Publication Number Publication Date
EP1869538A1 true EP1869538A1 (fr) 2007-12-26

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP05792409A Ceased EP1869538A1 (fr) 2005-04-08 2005-09-17 Terminal client leger et systeme client-serveur comportant un tel terminal

Country Status (4)

Country Link
US (1) US7930454B2 (fr)
EP (1) EP1869538A1 (fr)
DE (1) DE112005003602A5 (fr)
WO (1) WO2006105743A1 (fr)

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GB0709102D0 (en) * 2007-05-11 2007-06-20 Kitchener Renato Power over broadband backbone for control and instrumentation
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US8452877B2 (en) * 2010-04-28 2013-05-28 Lenovo (Singapore) Pte. Ltd. Establishing a remote desktop
US20130126078A1 (en) * 2011-11-23 2013-05-23 GM Global Technology Operations LLC Method of forming an article attachable to an exterior surface of a vehicle

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Also Published As

Publication number Publication date
DE112005003602A5 (de) 2008-03-20
US20080285212A1 (en) 2008-11-20
WO2006105743A1 (fr) 2006-10-12
US7930454B2 (en) 2011-04-19

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