EP2625678B1 - Procédé servant à faire fonctionner une installation d'annonces orales - Google Patents

Procédé servant à faire fonctionner une installation d'annonces orales Download PDF

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Publication number
EP2625678B1
EP2625678B1 EP11790863.2A EP11790863A EP2625678B1 EP 2625678 B1 EP2625678 B1 EP 2625678B1 EP 11790863 A EP11790863 A EP 11790863A EP 2625678 B1 EP2625678 B1 EP 2625678B1
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EP
European Patent Office
Prior art keywords
loop
impedance
switches
beginning
isolator
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EP11790863.2A
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German (de)
English (en)
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EP2625678A1 (fr
Inventor
Thomas Müller
Andreas Nejedly
Robert Reither
Josef Schreiner
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Novar GmbH
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Novar GmbH
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R29/00—Monitoring arrangements; Testing arrangements
    • H04R29/007—Monitoring arrangements; Testing arrangements for public address systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R27/00—Public address systems

Definitions

  • the invention relates to a method for operating a voice announcement system of the type specified in the preamble of claim 1.
  • Voice announcement systems in public spaces often have an interface to an alarm system or form an integral part of the latter. At least when such electroacoustic systems are also used to announce danger messages, they are subject to high operational safety requirements. In particular, an interruption or a short circuit in the ring line supplying the loudspeakers must not lead to a failure of the entire system.
  • the microcontroller opens, which then switches off its operating voltage refers to the local energy store, the switch or switches in one of the looped-through wires of the loop. If the voltage dip is caused by a short circuit, this will isolate the short circuit. While in normal operation the center only feeds the audio signals and the AC supply voltage into the beginning of the ring circuit, in the event of a short circuit, the feed should also come from the end of the ring circuit in order to ensure the supply of the two stub lines created by the removal of the short circuit.
  • JP H 10 136493 discloses a method and an associated voice alarm device in which a distinction can be made between a loss of contact of a loudspeaker and the interruption of the entire bus line by impedance measurement. >
  • control center measures the impedance of the ring line step by step from the first to the last isolator module and the impedance of the entire ring line when it is started up, enters the measured values as setpoint values in an impedance table and periodically measures the impedance of the entire ring line during operation and compares it with the corresponding target value from the impedance table, generates an error message if a deviation is detected and determines the fault location by comparing the measured value with the individual target values in the impedance table and displays it.
  • This functionality can also be added to systems that are already installed with little effort.
  • An essential prerequisite for the uninterrupted maintenance of the function of the voice announcement system in the event of an interruption in the ring line is that the control center feeds the AC supply voltage into the ring line both from its beginning and from its end. At the same time, this is a prerequisite for restoring the operability of the system after a short circuit, more precisely the operability of the stub line resulting from the removal of a short circuit from the end of the previous loop to before the location of the short circuit.
  • a further improvement of the method consists in the fact that the control center carries out the step-by-step measurement of the impedance of the loop both from its beginning and from its end and enters the measured values in two impedance tables, during operation the impedance of the loop also from both its beginning as well as hers
  • the redundancy created in this way increases the reliability of an error message and, above all, the display of the correct error location.
  • control center calculates the impedance values of the ring circuit at the frequency of the supply voltage using Fourier analysis.
  • the easiest way to measure its impedance step by step from the first to the last isolator module is to first open the switches of all isolator modules and then sequentially close them to switch the loop through.
  • the opening and sequential closing of the switches is performed both from the beginning to the end and from the end to the beginning of the loop.
  • a simple way of removing a short circuit from the loop is that in the event of a short circuit, the switches of all isolator modules are opened and then sequentially closed again, starting at the beginning and at the end of the loop, and that the switches of the isolator modules immediately on both sides of the location of the short circuit after closing be reopened immediately.
  • the simultaneous re-establishment of the two stubs from the control panel could result in the isolator module adjacent to the location of the short circuit in the stub starting at the beginning of the previous loop closing its switch towards the location of the short circuit and at the same time any isolator module in the other stub as well closes its switch on the side of the short-circuit location and recognizes this short-circuit via the randomly also closed switches of the other separator modules up to the short-circuit location, it would open its switch again and leave it open. This could leave a significant portion of that second stub inoperable.
  • the last disconnector module at the end of the loop closes its switch or switches with a delay time longer than the time to sequentially close the switches from the first to the penultimate disconnector module.
  • each isolator module can be equipped with an LED that the microprocessor switches on when it has recognized that this isolator module is closest to the short-circuit location and therefore keeps the corresponding switch permanently open.
  • figure 1 has a control center that contains the components known per se, for example for a voice announcement, a connection A for the start of a 2-wire loop and a connection B for the end of this loop.
  • the cores of the loop are looped through isolator modules 1 to 7.
  • such a loop can comprise 60 or more separator modules.
  • Loudspeakers (not shown here) are connected to the cores of the ring line in the separator modules and/or to the line sections between the separator modules.
  • the audio signals are usually fed in at up to 100 Veff.
  • a sinusoidal signal with 22 kHz and an amplitude of approx. 50 V is fed in as an alternating supply voltage.
  • figure 2 shows a simplified and single-line block diagram of an isolator module.
  • the incoming ring line is connected to terminal 1 and the outgoing ring line is connected to terminal 2.
  • Two switches S1 and S2 are connected in series in one core of the ring circuit looped through from terminal 1 to terminal 2. Between S1 and S2 there is a terminal 3 for connecting a loudspeaker L1. Additional loudspeakers L2 and L3 can be connected to the loop outside of the separator module.
  • the switches S1 and S2 are designed here as contacts of separate relays (not shown).
  • the relays and thus the switches S1 and S2 are controlled by a microcontroller, depending on whether there is a sufficient voltage level on the input side and/or on the output side, more precisely whether a predetermined voltage level is exceeded or not reached.
  • the separate voltage test circuits required for this are known and are therefore not shown.
  • the microcontroller receives its operating voltage from a power pack which, in normal operation, draws its supply AC voltage from both the input side and the output side via a rectifier.
  • the power pack also includes an energy store in the form of a capacitor that is also constantly charged during normal operation from the AC supply voltage and via the rectifier after voltage adjustment. Its capacity is dimensioned in such a way that the isolator module can work autonomously for a certain period of time, eg one to two seconds, if the AC supply voltage (and the audio signals) fail.
  • figure 3 1 is a simplified flow chart illustrating the operation of each of the isolator modules and particularly the microcontroller's partially looped routines and subroutines.
  • the ring circuit is calibrated when it is put into operation for the first time and after every change, for example in the number of separator modules and/or loudspeakers.
  • the AC supply voltage is switched on to the ring line and then switched off again. This ensures that all relays, controlled by the microcontroller (see figure 3 ), their switches S1 and S2 have opened and thus a defined initial state is established, which is not initially the case when using bistable relays, for example.
  • the control center applies the AC supply voltage again, but only to the beginning of the loop, i.e. connection A.
  • the microcontroller of the isolator module 1 recognizes that the supply voltage is present and therefore closes its switches S1 and S2 (in Figure 3 with "Relay 1 " or "Relay 2").
  • the capacitor of its power supply is charged.
  • the control center measures the impedance of this first line section of the ring circuit at the frequency of the AC supply voltage and enters the measured value in a first field of an impedance table A as the target value.
  • the second separator module After the switch S2 of the first separator module is closed, the second separator module also receives the AC supply voltage. From the impedance jump that occurs when switch S2 closes, the control center recognizes that the ring line is now switched through to this second isolator module. The control center repeats the impedance measurement and enters the new value in a second field of the impedance table A as the nominal value of the impedance up to the second isolator.
  • This calibration process and the creation of a complete series of values in the impedance table A continues up to the last isolator module.
  • the control panel can then measure the impedance of the entire loop up to its end at connection B and also save this setpoint. This measurement can also be carried out at a later point in time.
  • control panel switches off the AC supply voltage from its connection A. This opens the switches S1 and S2 of all isolator modules again.
  • the control center then applies the AC supply voltage to its connection B and thus to the end of the loop and repeats the calibration process from the end to the beginning of the loop.
  • the control center enters the corresponding values in an impedance table B.
  • the panel applies the AC supply voltage to both its A and B terminals. If not before, the central unit now measures the total impedance of the closed ring and saves the measured value as a setpoint.
  • control panel periodically, e.g. every 5 to 10 seconds, measures the impedance of the ring circuit fed from both sides with the AC supply voltage and, if necessary, with audio signals, both from connection A and from connection B, and compares the measured values or actual values with the corresponding ones Target values in impedance table A or impedance table B.
  • the control center recognizes this interruption by the fact that the measured values or actual values of the impedance deviate from the corresponding setpoint values and therefore generates an error message. Furthermore, the control center compares the current measured values with the setpoint values entered in the individual fields of impedance tables A and B and, based on the result, determines the number of the isolator module that, seen from connection A, is before the interruption and the number of the isolator module that in the same sense after the interruption. The central unit shows these separator module numbers in a suitable form, e.g. on a display. The isolator modules are not involved in detecting an interruption. According to the flow chart in FIG. 3, only the disconnector modules located closest to the interruption open their switch S1 or S2 on the side of the interruption; however, this has no effect on the two stub lines caused by the interruption and/or on the control center or the continued function of the system.
  • the supply voltage at the isolating modules collapses both on the input side and on the output side.
  • Only the isolator module 1 then receives its alternating supply voltage via connection A and closes according to the program routine figure 3 its switches S1 and S2.
  • the separator module 2 also receives the AC supply voltage, closes its switches S1 and S2, etc., up to the separator module that is closest to the location of the short circuit.
  • this sequence is repeated, starting with connection B and the last isolator module, i.e. the in the example figure 1 the isolator module 7.
  • this last isolator module only begins to close its switches S1 and S2 with a time delay that is calculated in such a way that by then the longest possible stub line starting from connection A, i.e. up to the isolator module 6 in figure 1 , is completed with certainty.
  • This delay time can be 3 seconds for 60 separator modules, for example.
  • the control panel determines the numbers of the respective last isolator modules before the short-circuit location in the same way as in the case of an interruption.
  • the microcontroller of the isolator modules adjacent to the short-circuit location can control their LEDs to make it easier to find the physical short-circuit point.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Alarm Systems (AREA)
  • Locating Faults (AREA)

Claims (7)

  1. Procédé pour faire fonctionner une installation d'annonces orales, avec une centrale, qui alimente en signaux audio plusieurs haut-parleurs raccordés de manière parallèle par l'intermédiaire d'une ligne en boucle à deux conducteurs, qui passe par des modules isolateurs, parmi lesquels chaque module isolateur comprend
    - au moins un commutateur pour couper la ligne en boucle dans le cas d'un court-circuit,
    - un microcontrôleur de commande,
    - un accumulateur d'énergie rechargeable depuis la ligne en boucle,
    - et des circuits de test de tension pour une tension alternative d'alimentation fournie par la centrale,
    caractérisé en ce
    que la centrale mesure, lors de la mise en service de la ligne en boucle, son impédance progressivement depuis le premier jusqu'au dernier module isolateur ainsi que l'impédance de la totalité de la ligne en boucle, inscrit les valeurs mesurées en tant que valeurs de consigne dans un tableau d'impédance, mesure lors du fonctionnement périodiquement l'impédance de la totalité de la ligne en boucle et la compare à la valeur théorique correspondante issue du tableau d'impédance, génère, si un écart est constaté, un message d'erreur et détermine, par la comparaison de la valeur mesurée aux diverses valeurs de consigne du tableau d'impédance, l'emplacement de l'erreur et l'affiche.
  2. Procédé selon la revendication 1 ou 2, caractérisé en ce que la centrale injecte la tension alternative d'alimentation dans la ligne en boucle à la fois depuis son début et depuis sa fin.
  3. Procédé selon la revendication 1, caractérisé en ce que la centrale réalise la mesure progressive de l'impédance de la ligne en boucle à la fois depuis son début et depuis sa fin et inscrit les valeurs mesurées dans deux tableaux d'impédance, mesure périodiquement lors du fonctionnement l'impédance de la ligne en boucle également depuis son début et depuis sa fin, et compare, avant de générer un message d'erreur et un affichage de l'emplacement de l'erreur, les valeurs réelles mesurées aux valeurs de consigne des deux tableaux d'impédance.
  4. Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la centrale calcule les valeurs d'impédance de la ligne en boucle à la fréquence de la tension d'alimentation par une analyse de Fourier.
  5. Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que lors de la mise en service de la ligne en boucle, les commutateurs de tous les modules isolateurs sont d'abord ouverts puis sont fermés de manière séquentielle pour connecter la ligne en boucle.
  6. Procédé selon la revendication 5, caractérisé en ce que l'ouverture et la fermeture séquentielle des commutateurs sont effectuées à la fois depuis le début vers la fin et depuis la fin vers le début de la ligne en boucle.
  7. Procédé selon l'une quelconque des revendications 1 à 6, caractérisé en ce que dans le cas d'un court-circuit, les commutateurs des modules isolateurs, en commençant sur le début et sur la fin de la ligne en boucle, se referment de manière séquentielle, et que les commutateurs des modules isolateurs s'ouvrent immédiatement à nouveau après la fermeture directement de part et d'autre de l'emplacement du court-circuit.
EP11790863.2A 2010-10-04 2011-10-04 Procédé servant à faire fonctionner une installation d'annonces orales Active EP2625678B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010047220A DE102010047220B4 (de) 2010-10-04 2010-10-04 Verfahren zum Betreiben einer Sprachdurchsageanlage
PCT/EP2011/004937 WO2012045436A1 (fr) 2010-10-04 2011-10-04 Procédé servant à faire fonctionner une installation d'annonces orales

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP21214038.8 Division-Into 2021-12-13

Publications (2)

Publication Number Publication Date
EP2625678A1 EP2625678A1 (fr) 2013-08-14
EP2625678B1 true EP2625678B1 (fr) 2022-08-03

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EP11790863.2A Active EP2625678B1 (fr) 2010-10-04 2011-10-04 Procédé servant à faire fonctionner une installation d'annonces orales

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US (1) US9462401B2 (fr)
EP (1) EP2625678B1 (fr)
CN (1) CN103299352B (fr)
DE (1) DE102010047220B4 (fr)
WO (1) WO2012045436A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010047220B4 (de) * 2010-10-04 2012-07-05 Novar Gmbh Verfahren zum Betreiben einer Sprachdurchsageanlage
EP2833333B1 (fr) 2013-07-31 2018-12-19 Honeywell Life Safety Austria GmbH Système de bus et procédé pour faire fonctionner un système de bus
WO2018187269A1 (fr) * 2017-04-05 2018-10-11 Carrier Corporation Supervision électrique active d'interface audio
EP3503591B1 (fr) * 2017-12-19 2021-02-03 Honeywell International Inc. Dispositif permettant de connecter et de déconnecter électriquement des portions d'une ligne électrique, système d'adresse publique, procédé de détection d'une défaillance dans une ligne électrique
CN114223218A (zh) * 2019-08-14 2022-03-22 杜比实验室特许公司 用于监测和报告扬声器健康状况的方法和系统

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JP2001036995A (ja) * 1999-07-21 2001-02-09 Toa Corp スピーカ回線の異常検知装置
DE102010047220A1 (de) * 2010-10-04 2012-04-05 Novar Gmbh Verfahren zum Betreiben einer Sprachdurchsageanlage

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JPH10136493A (ja) * 1996-10-28 1998-05-22 Toa Corp スピーカラインの検査装置
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AT504297B1 (de) * 2006-09-28 2009-11-15 Av Digital Audio Videotechnik Verfahren und messeinrichtung zur überwachung von beschallungsanlagen
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Patent Citations (2)

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Publication number Priority date Publication date Assignee Title
JP2001036995A (ja) * 1999-07-21 2001-02-09 Toa Corp スピーカ回線の異常検知装置
DE102010047220A1 (de) * 2010-10-04 2012-04-05 Novar Gmbh Verfahren zum Betreiben einer Sprachdurchsageanlage

Also Published As

Publication number Publication date
DE102010047220B4 (de) 2012-07-05
CN103299352B (zh) 2015-08-19
US9462401B2 (en) 2016-10-04
EP2625678A1 (fr) 2013-08-14
WO2012045436A1 (fr) 2012-04-12
DE102010047220A1 (de) 2012-04-05
CN103299352A (zh) 2013-09-11
US20140029754A1 (en) 2014-01-30

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