EP2503527B1 - Système de communication, notamment pour alarme et son procédé de fonctionnement - Google Patents

Système de communication, notamment pour alarme et son procédé de fonctionnement Download PDF

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Publication number
EP2503527B1
EP2503527B1 EP12001162.2A EP12001162A EP2503527B1 EP 2503527 B1 EP2503527 B1 EP 2503527B1 EP 12001162 A EP12001162 A EP 12001162A EP 2503527 B1 EP2503527 B1 EP 2503527B1
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EP
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Prior art keywords
message
limit value
reception strength
reception
range controller
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EP12001162.2A
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German (de)
English (en)
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EP2503527A1 (fr
Inventor
Markus Bahlinger
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Hekatron Vertriebs GmbH
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Hekatron Vertriebs GmbH
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Publication of EP2503527A1 publication Critical patent/EP2503527A1/fr
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    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/18—Prevention or correction of operating errors
    • G08B29/20—Calibration, including self-calibrating arrangements
    • G08B29/24—Self-calibration, e.g. compensating for environmental drift or ageing of components
    • G08B29/26—Self-calibration, e.g. compensating for environmental drift or ageing of components by updating and storing reference thresholds
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
    • G08B25/007—Details of data content structure of message packets; data protocols

Definitions

  • the invention relates to a communication system, in particular for danger alarm systems comprising interconnected hazard alarms, and to a method for operating such a communication system, and to a communication terminal using the method for use in the communication system.
  • a security alarm system in which the receivers are brought into an installation mode during the system installation in which the received signal is disturbed at the receiver and therefore a higher quality reception signal is required than in normal operation. If the receivers in installation mode can receive all the transmitters of the system, a quality reserve for communication in normal operation is assumed.
  • the EP0874341 suggests that, during installation of an alarm system, the transmission energy be reduced compared to normal operation. Receivers that are installed are changed to their position until a position is found where the signals transmitted with lower transmission power can be received.
  • Both systems limit communication range during system installation and can only detect faults at this stage. You also need additional switching elements in the send or Receive circuit that can switch between different power levels when sending or receiving and are inflexible regarding the range control and limited to the installation mode.
  • In the from the US 5,801,626 become known system transmission disturbances can also be detected after the installation phase.
  • Separate monitoring signals are sent to check for undisturbed reception. Receiving a signal measures the signal strength and determines if it is a monitoring signal. If the received signal is a monitor signal, then the measured signal strength is compared to a fixed threshold. If the measured signal strength falls below the threshold value, then the monitoring signal is rejected and not answered. For all other signals, the reception strength is ignored.
  • the threshold is determined here in the receiving device based on the signal strength, which during the reception of at least a portion of the signal z. B. the preamble is measured. If the signal strength exceeds the threshold value determined on the basis of the measured values, the signal is processed further, otherwise it is discarded. Although the latter reduces the disturbing influence of neighboring systems, but remains prone to error in this regard, if z. B. as a first signal, a weak signal is received and therefore the threshold is determined too low, also can not affect the range here targeted and flexible.
  • the invention is therefore based on the object of specifying an operating method, a communication system and a communication terminal, in particular for communication in hazard detection systems, which do not have the disadvantages of the prior art, or at least mitigate it.
  • a limit value for the reception strength of a receiver in a telegram to be transmitted is provided for controlling the communication range.
  • a sending system subscriber z. B. a smoke detector depending on its operating mode or the type of receiving device from a limit and adds it z. B. in the header of a telegram to be sent.
  • the Receive circuit that can switch between different power levels when sending or receiving and are inflexible regarding the range control and limited to the installation mode.
  • In the from the US 5,801,626 become known system transmission disturbances can also be detected after the installation phase. Separate monitoring signals are sent to check for undisturbed reception. Receiving a signal measures the signal strength and determines if it is a monitoring signal.
  • the received signal is a monitor signal
  • the measured signal strength is compared to a fixed threshold. If the measured signal strength falls below the threshold value, then the monitoring signal is rejected and not answered. For all other signals, the reception strength is ignored.
  • the threshold is determined here in the receiving device based on the signal strength, which during the reception of at least a portion of the signal z. B. the preamble is measured. If the signal strength exceeds the threshold value determined on the basis of the measured values, the signal is processed further, otherwise it is discarded. Although the latter reduces the disturbing influence of neighboring systems, but remains prone to error in this regard, if z. B.
  • a shopping cart which receives a telegram sent by an access point, measures, during the reception of the telegram, the RSSI value with which the telegram is received and compares the measured value with the value sent in the telegram. Only when the measured RSSI value reaches or exceeds the transmitted RSSI value is the received telegram processed further and contained commands are executed. Otherwise the telegram is rejected.
  • By assigning a fixed RSSI value to each transmit-receive area multiple transmit-receive areas of different sizes can be set in a simple manner. However, the size of a single transceiver area can not be flexibly changed during operation in this way.
  • the invention is therefore based on the object of specifying an operating method, a communication system and a communication terminal, in particular for communication in hazard alarm systems, which do not have the disadvantages of the prior art, or at least mitigate and with the reception range are easily adapted flexibly to different circumstances can.
  • a limit value for the reception strength of a receiver in a telegram to be transmitted is provided for controlling the communication range.
  • a sending system subscriber z. B. a smoke detector depending on its operating mode or the type of receiving device from a limit and adds it z. B. in the header of a telegram to be sent.
  • Limit value can be in the form of a received field strength value (RSSI) or even only as a relative value from a relative scale of z. 0-10.
  • RSSI received field strength value
  • a lower limit can be z. B. be selected during an installation mode, while possibly even the maximum possible value is selected in an alarm. However, it is also conceivable to specify a low value generally even after installation in order not to disturb adjacent systems that have the same address range.
  • the telegram is sent. All receivers within the physical range can receive the transmitted telegram. When receiving a telegram, the receivers simultaneously determine the reception strength with which the telegram is received. This they can z. B.
  • the limit value for the reception strength is extracted from the telegram and compared with the reception strength during the reception. If it results from this comparison that the measured reception strength falls below the limit value, then the telegram is discarded or the possibly still ongoing reception is aborted. Before comparing the reception strength with the limit value, a comparison of the own receiver address with the address of the receiver to which the telegram may be directed can also be made. If it is already established that the addresses do not match, then the comparison of the reception strength with the limit value may be omitted, since the telegram is discarded anyway.
  • the limit value for the reception strength is to be sent in the same telegram with the reception strength of which the limit value is compared.
  • the limit value for the reception strength and the other data to be transmitted are divided into two or more telegrams. It is therefore particularly preferable for the limit value to be transmitted and received within the same telegram group whose telegrams are subject to the limit value.
  • the limit value for a receive field strength that applies to the following or a series of subsequent telegrams could be sent in a telegram.
  • the telegram containing the reception threshold for subsequent messages is transmitted with a higher transmission power and / or redundantly possibly even on different channels and / or must first be confirmed by the receiver before the subsequent messages are sent.
  • the method for operating a communication system regulates the range of the communication and thus also represents a method for communicating.
  • the communication system is formed by a hazard detection system.
  • the invention relates hence a method for communicating in a hazard detection system.
  • a hazard detection system often consists of at least one device, such as a security alarm center for receiving messages and detectors with sensors for hazard characteristics such as smoke, the detectors having at least one transmitter for sending alarm or status messages.
  • a preferred type of hazard detection system is formed of several interconnected hazard alarms, each hazard alarm is equipped in addition to sensors and transmitters with receiver and alarm and display means.
  • a system user in particular a hazard detector, provides a limit for receiving strength in a message to be sent.
  • the telegram is sent and can be received by a second system subscriber in particular a hazard detector.
  • the reception strength z. B. determined as RSSI value and compared with the limit value from a previously received message, but preferably with the received from the same telegram limit value. If it is determined in this comparison that the received strength falls below the limit, then the telegram is discarded.
  • the invention also relates to a communication system with at least one transmitting system subscriber, which is set up in particular for the transmission of danger messages and with at least one receiving system subscriber, which is set up in particular for receiving danger messages.
  • the sending system subscriber contains a first range control, which provides the receiving system subscriber with a limit for the reception strength in a telegram.
  • the receiving system subscriber includes a second range control, which comprises a measuring device for the reception strength of the received messages and a comparison device.
  • the comparison device is set up to compare the reception strength measured when receiving a telegram with the limit value that was provided by the transmitting system subscriber in a previously transmitted telegram, but preferably in the same telegram.
  • the second range control is also set up to discard the received message if the measured reception strength falls below the limit.
  • a transmitting system subscriber can also receive corresponding devices for receiving and a receiving system subscriber also the corresponding devices for transmission.
  • the communication system is formed by a hazard detection system in which the system participants in particular danger detectors communicate with each other by z. For example, you can exchange status and alarm messages with each other and finally display to system users.
  • a hazard detection system consists of at least two interconnected hazard detectors, which are set up in particular for detecting and reporting smoke, temperature, fire and / or gases.
  • Each of these hazard detectors includes a transmitter and a receiver, and first and second range controllers.
  • the first range control is set up to provide a limit for receiving strength in a telegram to be sent.
  • the second range control comprises a first measuring device for the received strength of the received telegrams and a comparison device.
  • the comparison device is set up to compare the reception strength measured when a telegram is received with the limit value provided by the first range control of the transmitting danger detector in a previously sent but preferably in the same telegram.
  • the second range control is set up to reject the received telegram if the measured reception strength falls below the limit value.
  • the invention relates to a communication terminal, which is formed in a preferred embodiment as a hazard detector with one or more sensors.
  • the sensors are in particular configured to detect hazard parameters such as smoke, temperature, fire and / or gas.
  • the communication terminal according to the invention has a transmitter, a receiver and a control device, and a first and a second range control.
  • the first range control is set up to provide a limit for receiving strength in a telegram to be sent.
  • the second range control comprises a measuring device for the reception strength of received telegrams and a comparison device.
  • the comparison device is in turn set up to compare the reception strength measured on reception of a telegram with the limit value provided by the first range control of a transmitting danger detector in a previously transmitted telegram, but preferably in the same telegram.
  • the second range control or the control device are set up to discard the received telegram if the measured reception strength falls below the limit value.
  • the single FIGURE shows a communication system according to the invention with two communication terminals according to the invention which are designed as hazard warning detectors.
  • FIG. 1 shows an example of a communication system (1) in the form of a hazard detection system (1) which is shown here by way of example with several hazard warning devices (2).
  • the system could also from a danger center (ggf.14) with one or more satellites z. B. danger detector (2) exist.
  • the hazard warning devices (2) have a control unit (9) which controls and coordinates environmental measurements by means of the sensors (10) and communication with other hazard warning devices.
  • the control unit (9) also assumes the evaluation of the signals of the sensors (10).
  • the hazard warning (2) include display and alarm means (13) with which states z. B. malfunctions such as too low battery detector (2) and alarms can be displayed.
  • a hazard warning (2) both own states and alarms, as well as other hazard warning (2) display.
  • a hazard warning device (2) contains at least one receiver (3) with which it can receive corresponding information from other hazard warning detectors (2).
  • a hazard alert (2) also includes a transmitter (4).
  • the transmitter (4) is associated with a first range control (5).
  • the first range control (5) inserts in a selected, but preferably in each telegram to be sent, the danger alarm (2) to other hazard warning (2) or possibly to a control center, a limit on the reception strength, the reception of the telegram is evaluated by a hazard warning (2) or possibly a central office.
  • an inventive hazard warning device (2) also contains a receiver (3).
  • the receiver (3) is associated with a second range control (6).
  • the second range control (6) comprises a measuring device (7) for the reception strength with which a telegram is received and a comparison device (8).
  • the measuring device (7) for the reception strength is usually a part of the receiver (3), which is the reception strength of the second range control (6) z. In the form of an RSSI signal or value. Therefore, the logical rather than the physical assignment is presented here.
  • the comparison device (8) compares the measured reception strength with the limit value previously extracted from a telegram, wherein the limit value from a previously transmitted telegram is preferably extracted from the same telegram. If in this comparison If it is determined that the measured reception strength falls below the limit value, the received telegram is discarded. In the event that the reception of the telegram is still in progress, it can then be terminated immediately. The discarding of the telegram can take place in that the second range control (6) does not forward the telegram to the control unit (9) or by giving a signal to the control unit (9) which indicates to the control unit (9) received telegram not evaluate but discard.
  • the selection of the reception strength limit values by the first range control (5) takes place on the basis of different criteria. These include various operating modes, states of the danger detector such as malfunction, the device type to which a telegram is addressed and the content of the telegram itself.
  • the first range control (5) can be used for example. B. choose during a installation mode, a very low limit, which is always exceeded in the further operation. Here, a sufficient signal to noise ratio is maintained even with subsequent changes in the transmission properties.
  • a mute command sent by a hazard warning (2), which has not detected an alarm itself then in the telegram that contains the mute command, a lower limit may be provided, whereupon only detectors (2) in the vicinity of this detector (2) stop the alarm.
  • a high limit can be selected so that all other detectors (2) in the system (1) stop the alarm.
  • all detectors (2) it is conceivable for all detectors (2) to specify a low limit even in the normal operating mode in order not to disturb adjacent systems (1) of the same type. Due to the unlike the logical range unchanged physical range, it is also conceivable with a service tool (14) z.
  • a laptop As a laptop, a tablet PC or a smartphone with matching app that is used to monitor the states of each in a system (1) present hazard warning (2), all telegrams from a greater distance to receive and evaluate without a reduced transmission power to be limited. This service tool would simply ignore the limit.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Alarm Systems (AREA)
  • Fire Alarms (AREA)

Claims (7)

  1. Procédé destiné à faire fonctionner un système de communication (1), notamment un système d'avertisseurs de danger (1) composé d'avertisseurs de danger (2) mis en réseau les uns avec les autres, présentant les étapes de procédé suivantes,
    a. la mise à disposition d'une valeur limite pour une intensité de réception dans un télégramme qui doit être envoyé,
    b. l'envoi du télégramme avec la valeur limite mise à disposition par un usager du système qui envoie,
    c. la réception du télégramme avec la valeur limite mise à disposition et l'extraction hors du télégramme de la valeur limite sélectionnée et mise à disposition,
    d. la réception d'un télégramme et la détermination de l'intensité de réception, lors de la réception du télégramme,
    e. la comparaison par les usagers de système (2) qui réceptionnent, de la valeur limite issue du télégramme réceptionné, envoyé dans l'étape b avec l'intensité d'émission déterminée dans l'étape d et
    f. le rejet par les usagers de système (2) qui réceptionnent du télégramme réceptionné dans l'étape d si l'intensité de réception déterminée dans l'étape d n'atteint pas la valeur limite envoyée dans l'étape b
    caractérisé en ce que l'usager qui envoie sélectionne la valeur limite à l'aide de différents critères, notamment en fonction de son mode de fonctionnement ou du type de l'appareil qui réceptionne.
  2. Procédé selon la revendication 1, conçu en tant que procédé de communication au sein d'un système d'avertisseurs de danger (1), composé notamment d'avertisseurs de danger (2) mis en réseau les uns avec les autres, présentant les étapes de procédé suivantes,
    a. la mise à disposition par un usager du système (2) qui envoie d'une valeur limite pour une intensité de réception dans un télégramme qui doit être envoyé,
    b. l'envoi du télégramme avec la valeur limite mise à disposition par l'usager du système (2) qui envoie,
    c. la réception d'un télégramme avec la valeur limite mise à disposition et l'extraction hors du télégramme de la valeur limite mise à disposition,
    d. la réception d'un télégramme et la détermination par un ou par plusieurs usagers du système (2) qui réceptionnent de l'intensité de réception, lors de la réception du télégramme,
    e. la comparaison par les usagers de système (2) qui réceptionnent, de la valeur limite issue du télégramme réceptionné, envoyé dans l'étape b avec l'intensité d'émission déterminée dans l'étape d et
    f. le rejet par les usagers de système (2) qui réceptionnent du télégramme réceptionné dans l'étape d si l'intensité de réception déterminée dans l'étape d n'atteint pas la valeur limite issue du télégramme réceptionné, envoyé dans l'étape b
    caractérisé en ce que l'usager qui envoie sélectionne la valeur limite à l'aide de différents critères, notamment en fonction de son mode de fonctionnement ou du type de l'appareil qui réceptionne.
  3. Procédé selon l'une quelconque des revendications 1 ou 2, caractérisé en ce que le télégramme respectif envoyé dans l'étape b et un ou plusieurs télégrammes respectivement réceptionnés dans l'étape d forment un groupe de télégrammes, pour tous les télégrammes réceptionnés dans l'étape d s'appliquant la même valeur limite envoyée dans l'étape b.
  4. Système de communication (1) avec au moins un usager de système (2, 4) qui envoie, notamment aménagé pour envoyer des messages de danger et au moins un usager de système (2, 3, 14) qui réceptionne, notamment aménagé pour réceptionner des messages de danger, l'usager de système (2, 4) qui envoie contenant une première commande (5) de portées qui met à la disposition de l'usager de système (2, 3, 14) qui réceptionne, dans un télégramme une valeur limite pour une intensité de réception et l'usager de système (2, 3, 14) qui réceptionne contenant une seconde commande (6) de portées, avec un système de mesure (7) de l'intensité de réception d'un télégramme réceptionné et avec un système comparateur (8), le système comparateur (8) étant aménagé pour comparer l'intensité de réception mesurée lors de la réception d'un télégramme avec la valeur limite mise à disposition par l'usager de système (2, 4) qui envoie, dans notamment le même télégramme et la seconde commande (6) de portées étant aménagée pour rejeter le télégramme réceptionné, si l'intensité de réception mesurée n'atteint pas la valeur limite issue du télégramme réceptionné, caractérisé en ce que par la première commande (5) de portées, il s'effectue une sélection de la valeur limite pour les intensités de réception à l'aide de différents critères, notamment à l'aide de modes de fonctionnement, d'états, du type d'appareil ou du contenu du télégramme.
  5. Système de communication (1) selon la revendication 4, conçu en tant que système d'avertisseurs de danger (1), composé d'au moins deux avertisseurs de danger (2) mis en réseau l'un avec l'autre, qui sont notamment aménagés pour détecter et pour signaler de la fumée, une température, un incendie et/ou des gaz, chaque avertisseur de danger (2) contenant un émetteur (4) et un récepteur (3), les avertisseurs de danger (2) contenant une première (5) et une seconde (6) commandes de portées, la première commande (5) de portées étant aménagée pour mettre à disposition une valeur limite pour une intensité de réception dans un télégramme qui doit être envoyé et la seconde commande (6) de portées comprenant un système de mesure (7) pour l'intensité de réception et un système comparateur (8), le système comparateur (8) étant aménagé pour comparer l'intensité de réception mesurée lors de la réception d'un télégramme avec la valeur limite mise à disposition par la première commande (5) de portées d'un avertisseur de danger (2) qui envoie, dans notamment le même télégramme et la seconde commande (6) de portées étant aménagée pour rejeter le télégramme réceptionné si l'intensité de réception mesurée n'atteint pas la valeur limite mise à disposition dans notamment le même télégramme, caractérisé en ce que par la première commande (5) de portées, il s'effectue une sélection de la valeur limite pour les intensités de réception à l'aide de différents critères, notamment à l'aide de modes de fonctionnement, d'états, du type d'appareil ou du contenu du télégramme.
  6. Système de communication (2), notamment avertisseur de danger (2), avec un émetteur (4), un récepteur (3) et un système de commande (9), le terminal de communication (2) contenant une première (5) et une seconde (6) commande de portées, la première commande (5) de portées étant aménagée pour mettre à disposition dans un télégramme qui doit être envoyé une valeur limite pour une intensité de réception et la seconde commande (6) de portées comprenant un système de mesure (7) pour l'intensité de réception et un système comparateur (8), le système comparateur (8) étant aménagé pour comparer l'intensité de réception mesurée lors de la réception d'un télégramme avec la valeur limite mise à disposition dans notamment le même télégramme par la première commande (5) de portées d'un avertisseur de danger (2) qui envoie et la seconde commande (6) de portées ou le système de commande (9) étant aménagés pour rejeter le télégramme réceptionné si l'intensité de réception mesurée n'atteint pas la valeur limite mise à disposition dans notamment le même télégramme, caractérisé en ce que par la première commande (5) de portées, il s'effectue une sélection de la valeur limite pour les intensités de réception à l'aide de différents critères, notamment à l'aide de modes de fonctionnement, d'états, du type d'appareil ou du contenu du télégramme.
  7. Terminal de communication (2) selon la revendication 6, conçu en tant qu'avertisseur de danger (2) avec un ou plusieurs capteurs (10) qui sont aménagés pour détecter des valeurs caractéristiques de dangers, notamment de la fumée, une température, un incendie et/ou des gaz et avec un émetteur (4), un récepteur (3) et un système de commande (9), l'avertisseur de danger (2) contenant une première (5) et une seconde (6) commande de portées, la première commande (5) de portées étant aménagée pour mettre à disposition, dans un télégramme qui doit être envoyé, une valeur limite pour une intensité de réception et la seconde commande (6) de portées comprenant un système de mesure (7) pour l'intensité de réception et un système comparateur (8), le système comparateur (8) étant aménagé pour comparer l'intensité de réception mesurée lors de la réception d'un télégramme avec la valeur limite mise à disposition dans notamment le même télégramme par la première commande (5) de portées d'un avertisseur de danger (2) qui envoie et la seconde commande (6) de portées ou le système de commande (9) étant aménagés pour rejeter le télégramme réceptionné si l'intensité de réception mesurée n'atteint pas la valeur limite mise à disposition dans notamment le même télégramme, caractérisé en ce que par la première commande (5) de portées, il s'effectue une sélection de la valeur limite pour les intensités de réception à l'aide de différents critères, notamment à l'aide de modes de fonctionnement, d'états, du type d'appareil ou du contenu du télégramme.
EP12001162.2A 2011-03-23 2012-02-22 Système de communication, notamment pour alarme et son procédé de fonctionnement Active EP2503527B1 (fr)

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DE201110014889 DE102011014889A1 (de) 2011-03-23 2011-03-23 Kommunikationssystem insbesondere für Gefahrenmelder und Verfahren zu dessen Betrieb

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EP2503527A1 EP2503527A1 (fr) 2012-09-26
EP2503527B1 true EP2503527B1 (fr) 2016-12-14

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EP2503527A1 (fr) 2012-09-26

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