EP1378923A2 - Procédé pour l'évaluation de signaux de commutation et appareil associé - Google Patents

Procédé pour l'évaluation de signaux de commutation et appareil associé Download PDF

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Publication number
EP1378923A2
EP1378923A2 EP03006084A EP03006084A EP1378923A2 EP 1378923 A2 EP1378923 A2 EP 1378923A2 EP 03006084 A EP03006084 A EP 03006084A EP 03006084 A EP03006084 A EP 03006084A EP 1378923 A2 EP1378923 A2 EP 1378923A2
Authority
EP
European Patent Office
Prior art keywords
signal
state
signal path
output
path
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Withdrawn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
EP03006084A
Other languages
German (de)
English (en)
Other versions
EP1378923A3 (fr
Inventor
Andre Kling
Eduard SCHÖNBERGER
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP1378923A2 publication Critical patent/EP1378923A2/fr
Publication of EP1378923A3 publication Critical patent/EP1378923A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/50—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member
    • H01H13/64—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member wherein the switch has more than two electrically distinguishable positions, e.g. multi-position push-button switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
    • H01H2003/0293—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch with an integrated touch switch
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H2009/0083—Details of switching devices, not covered by groups H01H1/00 - H01H7/00 using redundant components, e.g. two pressure tubes for pressure switch
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2225/00—Switch site location
    • H01H2225/018—Consecutive operations
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/16—Indicators for switching condition, e.g. "on" or "off"
    • H01H9/167—Circuits for remote indication

Definitions

  • the invention relates to a method for evaluation of switching signals one between an idle state and one Actuator status of switchable signal transmitter. Such a thing Procedure takes place in particular for monitoring one for the Generation of safety-related signals provided by the signal generator Use. It is used in particular for detection control signals incorrectly generated by the signal generator.
  • the invention further relates to one, in particular Device for producing according to the above method and evaluation of switching signals.
  • Such a system is generally only two-handed to use and thus from a work economy perspective disadvantageous.
  • the realization of such a button as for example is known from DE 199 46 471 A1, but is technical complex and therefore costly.
  • the invention has for its object a method for Evaluation of switching signals indicate that in particular simple way to identify faulty operating conditions one between an idle state and an actuation state switchable signal generator is suitable. In particular, that should Be suitable for monitoring a signal transmitter, in which a mechanical malfunction is excluded is. Furthermore, the object of the invention based, a particularly simple, for generation and evaluation to indicate suitable devices for safety-related signals.
  • the task is solved by the Features of claim 1. Then the signal state in two signal paths connected by the signal generator are time-resolved determined and analyzed, one of the analysis result dependent output signal to control a technical Plant is generated. Analysis of the signal state of the two Signal paths follow the following rules. If both signal paths correspond to the idle state Have signal state, a first, indicating the idle state Output signal generated. This signal configuration is referred to below as the first operating state. In a second operating condition is provided that both signal paths correspond to the operating state Have signal state to display the actuation state generates a second output signal. A regular one Change between the first and the second operating state is only allowed if within a given Target switching time a change in the signal state in both Signal paths are done. Otherwise, i.e. if outside of one regular change of the operating state neither of the two operating states there is a faulty operating state recognized and an error message issued.
  • the object is achieved according to the invention solved by the features of claim 6. After that is a between an idle state and an actuation state switchable signal generator is provided, which on the output side two signal paths is connected to an evaluation unit to analyze the signal state of the two signal paths above rules, and to generate a corresponding output signal Is provided.
  • the signal state is determined continuously or discontinuously, two consecutive Determination times maximum at the target switching time are spaced.
  • the target switching time is preferably approximately 20 milliseconds.
  • This target switching time is thus a default time, which is expedient short of human response time and is therefore short compared to typical switching periods.
  • this target switching time is sufficiently long compared to the actual switching time of a conventional one Signal generator that is on the order of a millisecond lies.
  • the signal transmitter expediently a snap switching behavior on. In other words, the Signal generator regardless of the course of the actuation force over time forcibly within a structurally determined Switching time.
  • the two are Signal paths in both operating states with regard to their Signal state connected to each other inversely. So is from Apart from the moment of switching, the first signal path, for example leading the signal, so the second signal path Zero signal on, and vice versa. So in every regular Operating state of one of the signal paths carrying the signal. On this way is a line break or some other errors leading to signal loss even during stationary Operating phases immediately recognizable.
  • Such an inverse Wiring the two signal paths is particularly easy Wise with a changeover switch Signal generator possible.
  • a differentiated error message is expedient output, which indicates the type of error that occurred.
  • the error message continues to be sent simultaneously generates an emergency stop signal as an output signal, which the controlled technical system in a safe state transferred.
  • a short-stroke key switch is used as a signal generator.
  • a short-stroke key switch is still more compact because of this Size particularly advantageous in an operating device or to integrate a control panel of a technical system.
  • the device 1 shown in FIG 1 for generating and Evaluation of switching signals includes one as a push button trained signal generator 2, the type of a changeover switch optionally a signal input 3 with one of two Signal outputs 4 and 5 connects.
  • the signal generator 2 is preferred executed in a short stroke technology.
  • Short-stroke key switch as is usually the case in a keyboard, especially membrane keyboard, are used due to extremely compact size and extremely low susceptibility to errors out.
  • a suitable short stroke technology in which one Malfunction due to jamming of the switching mechanism is excluded by structural measures, for example known from US 5,990,772.
  • FIG. 1 shows the signal generator 2 in its idle state.
  • the signal input 3 is conductive via a switch contact 6 connected to signal output 5 while the connection interrupted between signal input 3 and signal output 4 is.
  • the signal input 3 of the signal generator 2 is connected on the input side to an input line 7, via which the signal input 3 an input signal S0 in the form of a constant electrical low voltage supplied becomes.
  • the signal state S1, S2 is both in the evaluation unit 9 Signal paths 8 and 10 recorded time-resolved and as required rules described in more detail below.
  • the evaluation unit 9 generates a corresponding one based on the analysis result Output signal S3 and transmits this via a Output line 11 to a component, not shown a technical system. For example, it is this component is about the drive of a movable Part of a machine tool.
  • the idle state the operating state assigned to the signal generator 2 referred to as the first operating state.
  • Appropriate sizes S1-S3 are shown uncoated.
  • the one in the actuation state in contrast, the assigned operating state is as designated second operating state and by dashed Sizes S1'-S3 'marked.
  • the evaluation unit detects a faulty ensemble of signal states S1 ", S2", so it gives a signal line 12 an error message F to an error indicator 13.
  • the error message F preferably contains specific information about the type of error detected.
  • the error indicator 13 makes, e.g. by a suitable sound or light signal, on the one hand, be aware that an error has occurred. On the other hand, he identifies on the basis of the error message F information contained the type of error and thus facilitates fault finding.
  • a first state corresponds to the idle state shown in FIG Operating state in which the signal state S1 in the signal path 8 "active", and signal state S2 in signal path 10 is "passive".
  • the evaluation unit 9 a zero signal as the first output signal S3 off, which for example as a stop command for one machine drive, not shown, can be used can.
  • the activation of the signal generator 2 is carried out according to FIG 2 by Applying manual pressure K to an actuator 14 of the signal generator 2.
  • a only indicated switching mechanism 15 of the switching contact 6 in switched its operating state.
  • the signal input 3 is connected to the signal output 4, while the connection between signal input 3 and the signal output 5 is interrupted.
  • the second operating state is thus the signal state S1 of the signal path 8 "passive" while the signal state S2 'of the signal path 10 is "active".
  • the evaluation unit 9 generates a constant, positive output signal S3 ', which in turn e.g. as a start command Machine drive, not shown, can be fed.
  • the evaluation unit 9 allows a change between the first and the second operating state, in particular one Change between the first and second output signal S3 or S3 'only when there is a corresponding change in the signal state S1, S1 ', S2, S2' in both signal paths 8 and 10 within a predetermined target switching time ts.
  • FIG 3 Proper switching processes between the idle state and the operating state, and corresponding to the first and second Operating state, are shown in FIG 3 in a time diagram shown.
  • the time course of the signal states S1, S1 'and S2, S2' shown above the time axis t.
  • the time course of the output signal S3, S3 ' is shown below the time axis t.
  • the diagram 3 underlying switching cycle is at the time t1 the signal generator 2 is actuated. This is the active one Signal state S1 in the passive signal state S1 ' and the passive signal state S2 into the active signal state S2 '.
  • the signal generator 2 has a snap switching behavior.
  • the actuator 14 is released.
  • the switch contact 6 jumps within the switching time ts back to the idle state. Because of the mechanical inertia of signal generator 2, the signal is lost in signal path 10 again before the signal build-up in signal path 8. Da the signal change at time t2 again within the If the desired switching time ts takes place, the evaluation unit 9 in turn leaves the change to the first operating state.
  • Another, operation phase analogous to the switching cycle described above takes place between times t3 and t4.
  • FIG. 4 shows faulty switching processes shown as an example.
  • parallel Line pair 16 is an interruption of each Time axis t and the respective state curves marked.
  • An incorrect operating state occurs, for example then when when the signal transmitter 2 is not in two signal paths 8 and 10 within the target switching time ts a change of state takes place.
  • Such a mistake as he made for example from a defective switching mechanism 15 or one oxidized switch contact 6 can be generated occurs according to 4 at time t5. This is where the Signal state S2 'delayed by more than the target switching time ts compared to the decay of the signal state S1.
  • the target switching time ts are both signal states S1 "and S2" "passive".
  • the evaluation unit 9 recognizes this as irregular operating state and triggers a corresponding error message F out. Even if, as in FIG. 4, the signal state S2 "becomes” active "at a later time, leaves the Control unit 9 changes to the second operating state does not admit and continues to output the safe zero signal.
  • the inverse error case namely a late return of the Signal generator 2 in the idle state, occurs according to FIG Time t6.
  • the evaluation unit After waiting for the target switching time ts after The evaluation unit generates deactivation of the signal state S2 ' again an error message F. At the same time it switches on the output side back to a zero signal and thus generates the safe output signal, also known as an emergency stop signal S3 ".
  • the signal path 10 switches to an active signal state S2 " without a signal loss in signal path 8 taking place beforehand is.
  • Such an error can occur, for example a short circuit in the lines 7,8,10 or in the signal transmitter 2 may be caused.
  • the active signal state S1 ", S2" of both Signal paths 8 and 10 in turn is considered an irregular operating state recognized and a corresponding error message F issued.
  • the error unit F is based on the evaluation unit 9 by generating the output signal S3 "in the safe emergency stop state back.
  • the output signals S3, S3 'and S3 " in the form of signal pulses instead of constant in time Signals are generated.
  • the output line 11 can be multi-channel for the separate output of the output signals S3, S3 'and S3 ".
  • the signal paths 8 and 10 can optionally be be redundant.
  • a pushbutton switch can also be used as signal transmitter 2, in which the signal paths 8 and 10 by parallel switching contacts, in particular an opener-closer pair become.

Landscapes

  • Push-Button Switches (AREA)
  • Testing Electric Properties And Detecting Electric Faults (AREA)
  • Automotive Seat Belt Assembly (AREA)
  • Safety Devices In Control Systems (AREA)
  • Input From Keyboards Or The Like (AREA)
EP03006084A 2002-07-01 2003-03-19 Procédé pour l'évaluation de signaux de commutation et appareil associé Withdrawn EP1378923A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10229488 2002-07-01
DE2002129488 DE10229488B3 (de) 2002-07-01 2002-07-01 Taste zum Auslösen von Steuerungsvorgängen

Publications (2)

Publication Number Publication Date
EP1378923A2 true EP1378923A2 (fr) 2004-01-07
EP1378923A3 EP1378923A3 (fr) 2005-04-13

Family

ID=29719427

Family Applications (2)

Application Number Title Priority Date Filing Date
EP03006084A Withdrawn EP1378923A3 (fr) 2002-07-01 2003-03-19 Procédé pour l'évaluation de signaux de commutation et appareil associé
EP03006465A Withdrawn EP1378924A3 (fr) 2002-07-01 2003-03-21 Bouton poussoir pour donner des commandes opérationnelles et clavier correpondant

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP03006465A Withdrawn EP1378924A3 (fr) 2002-07-01 2003-03-21 Bouton poussoir pour donner des commandes opérationnelles et clavier correpondant

Country Status (2)

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EP (2) EP1378923A3 (fr)
DE (1) DE10229488B3 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007020658A1 (de) 2007-04-30 2008-11-06 Infineon Technologies Austria Ag Halbleiterbauelement und Verfahren zur Herstellung desselben
DE102008006477B3 (de) * 2008-01-29 2009-02-12 Preh Gmbh Mehrstufiger Schalter mit auf Magnetkraft basierender Hebelbetätigungsmechanik
BE1022014B1 (nl) * 2013-12-20 2016-02-04 Televic Rail Nv Drukknop

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5382836A (en) * 1992-09-28 1995-01-17 Shinkoh Electric Co., Ltd. Push-button switch device
US5796056A (en) * 1994-01-19 1998-08-18 Nbb Nachrichtentechnik Gmbh & Co. Kg Multi-stage switch
US5990772A (en) * 1995-06-02 1999-11-23 Duraswitch Industries, Inc. Pushbutton switch with magnetically coupled armature
DE19946471A1 (de) * 1999-09-28 2001-03-29 Siemens Ag Mehrkanaliges sicherheitsgerichtetes Schaltelement, Verfahren zur mehrkanaligen Generierung von sicherheitsgerichteten Signalen und Schaltungsanordnung zu deren Auswertung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5382836A (en) * 1992-09-28 1995-01-17 Shinkoh Electric Co., Ltd. Push-button switch device
US5796056A (en) * 1994-01-19 1998-08-18 Nbb Nachrichtentechnik Gmbh & Co. Kg Multi-stage switch
US5990772A (en) * 1995-06-02 1999-11-23 Duraswitch Industries, Inc. Pushbutton switch with magnetically coupled armature
DE19946471A1 (de) * 1999-09-28 2001-03-29 Siemens Ag Mehrkanaliges sicherheitsgerichtetes Schaltelement, Verfahren zur mehrkanaligen Generierung von sicherheitsgerichteten Signalen und Schaltungsanordnung zu deren Auswertung

Also Published As

Publication number Publication date
EP1378924A2 (fr) 2004-01-07
EP1378924A3 (fr) 2005-04-13
EP1378923A3 (fr) 2005-04-13
DE10229488B3 (de) 2004-02-26

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