• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a method for combined fire detection and control for a rail vehicle, in which an evaluation device for a smoke level, which is applied to a smoke detector, triggers a fire message when the smoke level permanently exceeds a threshold value (S) over an associated validation time (t1) , Wherein the evaluation device for the at least one smoke detector is designed such that a separate validation time (t1, t2) is defined for a fire alarm and a fire fighting respectively.
    公开号:CH704809B1
    申请号:CH00319/12
    申请日:2012-03-07
    公开日:2016-01-29
    发明作者:Oliver Kemmann
    申请人:Siemens Ag；
    IPC主号:
    专利说明:

    The invention relates to a method for combined fire detection and control for a rail vehicle, in which an evaluation device for a smoke level, which is applied to a fire alarm, triggers a fire message when the smoke level permanently exceeds a threshold value over an associated validation time.
    For example, from the vehicle "Desiro Classic ÖBB" is a combined fire alarm and -bekämpfungsvorrichtung known. This works in such a way that a fire alarm automatically leads to an immediate fire fighting.
    Thus, it has happened in the past that accidentally extinguishing firing occurred. To prevent this, it has been considered as a possible solution to decouple a fire alarm and firefighting so that the fire is reported by smoke detectors, while firefighting is triggered by temperature detectors. However, such a procedure must be regarded as laborious with regard to the required technical equipment.
    Proceeding from this, the present invention seeks to further develop the aforementioned method for combined fire detection and control such that both effective unwanted extinguishing firing be reduced as well as to be kept for carrying out the process technical equipment is kept simple.
    The object is achieved by the method according to claim 1.
    In this way, the smoke detector, more precisely the smoke level detected on it, used to trigger both a fire alarm and fire fighting, so that it can be dispensed with further technical equipment. Due to the different validation times for fire detection and fire fighting, false fires can be effectively reduced.
    Preferably, a shorter validation time is set for a fire alarm than for a fire fighting. In other words, the smoke level must permanently exceed the predetermined threshold value over a longer period of time, so that firefighting is triggered.
    Continuously exceeding the smoke level threshold only during the validation time for a fire alarm does not trigger firefighting. In this case, only a message of a fire to, for example, operators of a rail vehicle.
    A permanent exceeding the threshold value for the smoke level on the validation time for firefighters preferably triggers both a fire and fire fighting. In this case, a fire message will be more timely than a fire with the help of suitable extinguishing agents.
    The measurement of the validation time for the fire alarm can start at the same time as the validation time for the fire fighting. However, this is not to be regarded as mandatory; rather, the start times for the validation time measurements can also be consecutive in time. For example, the expiration of the validation time for the fire alarm can determine the start of the validation time for the fire fighting.
    The validation time for the fire alarm and the validation time for the fire fighting are preferably re-measured at a decrease in the smoke level below the threshold. This means that if the threshold is not permanently exceeded, for example, the validation time for the fire alarm is restarted.
    Embodiments of the invention will be explained in more detail with reference to the drawings. Show it:<Tb> FIG. 1 <SEP> is a schematic representation of a curve of a smoke level as a function of time in the event that neither a fire alarm nor a fire fighting is triggered,<Tb> FIG. 2 <SEP> is a schematic representation of a curve of a smoke level as a function of time in the event of a fire without firefighting, and<Tb> FIG. 3 <SEP> is a schematic representation of a curve of a smoke level as a function of time in the event of a fire alarm and additional fire fighting.
    1 to 3, the operation of an evaluation device will now be explained, which determines, for example, within a rail vehicle, the output of a fire alarm or triggering a fire fighting. For this purpose, the evaluation device monitors a pending smoke level at a smoke detector, in particular whether the smoke level exceeds a predetermined threshold S permanently.
    The threshold value S is decisive both for the output of a fire alarm and for triggering a fire fighting. Separate validation times t1, t2 are defined for a fire alarm and for firefighting, whereby the validation time for the fire alarm t1 is shorter than that for the fire fighting t2.
    In the present embodiment, both validation times t1, t2 start at a time at which the smoke level exceeds the predetermined threshold value S. In Fig. 1, the threshold S is exceeded only over about 2/3 of the validation time for a fire alarm t1. After that, the smoke level drops permanently below the threshold value S. In this case, neither a fire alarm nor a fire fighting is triggered, and the validation times t1, t2 restart.
    In the example of FIG. 2, the smoke level over the entire validation time for a fire message t1 exceeds the threshold value S. Due to this, a fire message t1 is output, for example, to operating personnel of a rail vehicle. However, before the end of the validation time for triggering a firefighting t2, the smoke level falls below the threshold value S again, so that in the course of the smoke level shown in FIG. 2 as a function of time firefighting t2 is not triggered.
    Fig. 3 shows the case that the smoke level after exceeding the threshold value S and thus from the beginning of Validierzeiten t1, t2 for fire alarm t1 and fire fighting continues to rise sharply and until the end of the validation time for fire fighting t2 above the Threshold S remains. In this case, upon expiration of the validation time for a fire alarm t1, such is output, while at the end of the validation time for the fire fighting t2 firefighting measures are triggered.
    It should be emphasized that one and the same smoke detector is used for the evaluation of the smoke level both for the fire message t1 and for firefighting t2, so that the technical equipment for the combined fire alarm and control device described here can be kept little expensive ,
    In a short pending smoke event (Figure 2), operators of a rail vehicle are alerted so that appropriate action can be taken. For example, if the smoke event is due to smoke from a polluted contact or person, appropriate measures may be taken to counteract the smoke source. Thus, unwanted tripping the fire fighting device are avoided in small smoke events. Developing fires will continue to be reliably detected and fought. The device works so safe, but does not result in smaller smoke events to a deletion with, for example, the unpleasant side effects of the then required cleaning the interior of the rail vehicle.
    权利要求:
    Claims (4)
    [1]
    1. A method for combined fire detection and control for a rail vehicle, in which an evaluation device for a smoke level, which is applied to a smoke detector, fires a fire message when the smoke level over a validation time associated with the fire (t1) permanently exceeds a threshold value (S) , characterized in that the evaluation device for the smoke level of a smoke detector is designed such that in addition to the validation time associated with the fire (t1) a separate fire fighting associated Validierzeit (t2) and firefighting is triggered when the smoke level after the fire via a validation time associated with the fire fighting (t2) continues to exceed a threshold value (S) permanently.
    [2]
    2. Method according to claim 1, characterized in that a shorter validation time (t1) is specified for the fire alarm than for the fire fighting (t2).
    [3]
    3. The method according to any one of claims 1 or 2, characterized in that the evaluation device is designed such that the fire alarm associated Validierzeit (t1) and the fire fighting associated Validierzeit (t2) start at the same time.
    [4]
    4. The method according to any one of claims 1 to 3, characterized in that the evaluation device is designed such that the measurement of the fire detection associated Validierzeit (t1) and the fire fighting associated Validierzeit (t2) after a decrease in the smoke level below the threshold ( S) starts again.
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    同族专利:
    公开号 | 公开日
    CH704809A2|2012-10-15|
    DE102011006470A1|2012-10-04|
    AT511237A1|2012-10-15|
    DE102011006470B4|2016-07-28|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE19522300C2|1995-06-20|1997-05-28|Berufsfoerderungswerk Heidelbe|Electric safety device for hotplates|
    GB2347772B|1999-03-12|2003-05-07|Manhar Amlani|Fire alarm system|
    JP3972597B2|2001-04-24|2007-09-05|松下電工株式会社|Combined fire detector|
    DE10328376B3|2003-06-24|2005-02-17|Siemens Ag|False alarm prevention method for fire alarm device using respective filters for selecting interference frequency range for suppression of alarm signal and fire characteristic frequency range|
    法律状态:
    2016-10-31| PL| Patent ceased|
    优先权:
    申请号 | 申请日 | 专利标题
    DE102011006470.2A|DE102011006470B4|2011-03-31|2011-03-31|Combined fire detection and control device|
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