EP2065862A1 - Préparation de signaux de contrôle pour le contrôle de l'intelligibilité de signaux acoustiques d'un système de signalement de dangers - Google Patents

Préparation de signaux de contrôle pour le contrôle de l'intelligibilité de signaux acoustiques d'un système de signalement de dangers Download PDF

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Publication number
EP2065862A1
EP2065862A1 EP07120622A EP07120622A EP2065862A1 EP 2065862 A1 EP2065862 A1 EP 2065862A1 EP 07120622 A EP07120622 A EP 07120622A EP 07120622 A EP07120622 A EP 07120622A EP 2065862 A1 EP2065862 A1 EP 2065862A1
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EP
European Patent Office
Prior art keywords
peripheral unit
signals
test signal
signal
test
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Withdrawn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
EP07120622A
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German (de)
English (en)
Inventor
Walter Vollenweider
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
Priority to EP07120622A priority Critical patent/EP2065862A1/fr
Publication of EP2065862A1 publication Critical patent/EP2065862A1/fr
Withdrawn legal-status Critical Current

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    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B3/00—Audible signalling systems; Audible personal calling systems
    • G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission
    • 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
    • G08B29/12—Checking intermittently signalling or alarm systems
    • G08B29/126—Checking intermittently signalling or alarm systems of annunciator circuits

Definitions

  • the present invention relates to the field of acoustic hazard detection technology.
  • the present invention particularly relates to a peripheral unit for an acoustic alarm system, which peripheral unit can be checked and tested in a simple manner with regard to the intelligibility of output acoustic signals.
  • the present invention further relates to a hazard detection system, which has a center and at least one coupled to the center of peripheral unit of the type mentioned.
  • the present invention relates to a method for providing test signals for checking the audible signals output by a peripheral unit of said type for their comprehensibility.
  • the audibility of audible warnings can be checked, for example, using the software "DIRAC", which is distributed by Brüel & Kjaer (see also http://www.bksv.com).
  • DIRAC digital imager
  • a suitable test signal which is usually stored on a compact disc (CD) and fed in an appropriate manner. If the sound system is designed for continuous playback of music, a CD player is usually present anyway. If this is not the case, in many cases a microphone input is used, into which the corresponding test signal can be fed.
  • Playback from CD is in this case not appropriate, since there is no guarantee that in case of emergency, the correct CD is inserted and thus the correct announcement is played.
  • playback devices for CDs like all devices with moving mechanical components, are prone to failure. It may be that a microphone input is present so that a responsible person can make an announcement in an emergency. This input is not always available, and in France such a microphone input is even prohibited.
  • emergency warning systems are known in which the messages to be played in an emergency, central saved and strengthened to the necessary performance. These signals are transmitted to the individual playback units using the known 100 V technology. In this case, the ohmic losses are significantly reduced by increased voltage, especially for longer lines.
  • emergency warning systems are also known in which systems are used in which the messages to be displayed are not stored centrally but locally in each individual reproduction unit. From a central location, there is only one connection with which the playback is triggered and optionally one of several messages can be selected. In such a system, it is naturally very cumbersome to feed the test signal in the decentralized playback units.
  • the object of the present invention is to improve the examination of the intelligibility of acoustic signals of a peripheral unit of a danger detection system.
  • a peripheral unit for a danger detection system and in particular for an electroacoustic hazard detection system has a control device, which can be coupled to a control center of the danger detection system, and which is set up in such a way that at least one test signal for checking the intelligibility of acoustic signals that can be reproduced by the peripheral unit can be provided in response to a request signal from the control center is.
  • the described peripheral unit is based on the knowledge that the test signals required for checking the intelligibility of acoustic alarm signals can be stored in the peripheral unit itself or generated if necessary. In order to check the intelligibility of the acoustic alarm signals can thus be dispensed advantageously on an external feed of corresponding test signals in the peripheral unit.
  • This has the advantage that a routine check of the operability of a plurality of peripheral units can be effected in an effective manner by a suitable request signal or by a plurality of suitable request signals.
  • the request signals can be transmitted via a conventional detector line from the center to the relevant peripheral units. A complicated in terms of operating effort inserting external storage media such as a CD in each peripheral unit can thus be avoided.
  • the invention has no principal upper limit with regard to the number of different test signals which can be provided internally.
  • a large number of different test signals has the advantage that the intelligibility of issued acoustic alarm signals or audible warning signals can be checked in a variety of ways. As a result, the measurement accuracy is increased in a significant way.
  • the peripheral unit additionally has a memory device which is coupled to the control device and which is set up to store the at least one test signal.
  • test signals can be stored in the memory device, which can be provided by a suitable request signal. Each test signal is assigned a specific acoustic test signal with which the intelligibility of acoustic alarm signals can be checked.
  • this test signal or these test signals are always present in the peripheral unit and can thus be used for corresponding intelligibility tests without any appreciable time delay.
  • the storage of the at least one test signal can be carried out in the same manner as are stored in a known manner with modern peripherals fixed predetermined acoustic alarm signals. The same applies to the retrieval of the test signal, which can be read in the same or in a similar manner as a stored audible alarm signal from the memory device.
  • the peripheral unit additionally has a calculation device for calculating the at least one test signal.
  • a calculation device for calculating the at least one test signal. This has the advantage that the at least one test signal does not have to be stored constantly but can be generated in case of need by applying a predetermined calculation rule. Since the storage of a calculation rule usually requires significantly less storage space than the storage of an audio test signal, in this way the required memory requirement for an internal provision of the at least one test signal can be significantly reduced. This means that with a certain storage capacity significantly more different audio test signals can be provided.
  • the calculation device has a feedback shift register.
  • a feedback shift register in which, for example, two outputs of the shift register are combined via an XOR gate and an input of the Shift register are fed, has the advantage that in a simple manner, a reproducible pseudo-random noise signal can be generated.
  • Pseudo-random noise signals are just as well suited as a test signal with regard to comprehensibility tests, as are completely random noise signals which are generated, for example, by statistical thermal effects.
  • the calculation device may also have a modulation device, which may be connected downstream of the feedback shift register, for example.
  • a modulation device which may be connected downstream of the feedback shift register, for example.
  • pseudo-random noise signals can additionally be modulated so that particularly suitable test signals can be generated for a comprehensibility test.
  • this corresponds to at least one test signal of the standard EN 60268-16.
  • test signals can be provided, which do not meet the standard EN 60268-16, but which can also be used to verify the speech intelligibility.
  • the at least one test signal is a noise signal.
  • the noise signal may include a completely random noise or a so-called pseudorandom noise.
  • a pseudo-random noise which can be generated for example by means of a feedback shift register, has the advantage that it represents a reproducible signal.
  • the noise signal may also have a certain modulation, so that even in the case of a completely random noise for a comprehensibility test particularly suitable test signals can be generated.
  • the at least one test signal is a superposition of selected sinusoidal individual signals.
  • the generation of the at least one test signal by a superposition of suitable sine and / or cosine oscillations has the advantage that exactly reproducible test signals can be generated in a particularly simple manner.
  • the at least one test signal is a voice signal.
  • the speech signal may be a suitable word, such as the word "rhubarb".
  • this word is repeated over and over again so that the speech intelligibility of a speech signal generated by the peripheral unit can be determined by repeated measurements with high accuracy.
  • syllables or words that do not necessarily conform to EN 60268-16 can be used to test speech intelligibility. These syllables and / or words can be permanently stored in the memory device described above and reproduced if necessary.
  • the peripheral unit additionally has a further memory device, which is coupled to the control device and which is used to store at least one acoustic signal Alarm signal is set up.
  • a further memory device which is coupled to the control device and which is used to store at least one acoustic signal Alarm signal is set up.
  • a plurality of data memories can also be provided, wherein in each data memory, for example, one or more test and / or alarm signals can be stored. If exactly one test or alarm signal is stored in each data memory, the individual data memories can, if required, be individually selected by the control device and the corresponding signal can be read out.
  • the peripheral unit additionally has a display device for reproducing acoustic test signals based on the at least one test signal.
  • the reproduction device has at least one acoustic output unit, such as a conventional loudspeaker.
  • the display device may also have a suitable amplifier, which amplifies the signals directed to the acoustic output unit in a known manner.
  • the security alarm system has a control center and at least one peripheral unit of the above-mentioned type, wherein the control center and the at least one Peripheral unit are connected to each other via a line or a wireless connection.
  • the described danger detection system is based on the finding that the intelligibility of acoustic danger messages, which can be output by any peripheral units of the danger detection system, can be checked in an effective manner by supplying suitable request signals to the peripheral units described above.
  • the test signals intended for different peripheral units can be transmitted successively or simultaneously via the line from the center to the respective peripheral unit.
  • the line may be a bus line, for example, so that each individual one of a plurality of peripheral units can be addressed individually.
  • the intelligibility of all the alarm signals generated by the danger detection system can be tested without the corresponding test signals of each individual peripheral unit having to be provided externally, for example by inserting a CD.
  • routine checks of the hazard detection system can be effectively, i. be carried out without a major operating effort.
  • a method for checking the audible signals output by a peripheral unit of the above type comprises (a) supplying a request signal to the peripheral unit, (b) providing a test signal by the controller of the peripheral unit.
  • the described verification method for peripheral units is based on the insight that the intelligibility of alarm messages of the peripheral units are checked in a simple and particularly convenient manner by an internal provision of suitable test signals, which are stored, for example, in a memory device of the peripheral unit or determined in a computing device of the peripheral unit can.
  • suitable test signals which are stored, for example, in a memory device of the peripheral unit or determined in a computing device of the peripheral unit can.
  • FIG. 1 shows an electro-acoustic hazard detection system 100, which has a center 110 and multiple peripheral units or alarm message playback devices. For clarity, in FIG. 1 only two peripheral units 120a and 120b are shown. Depending on the particular requirements, the electroacoustic hazard detection system 100 may include one peripheral device, multiple peripheral devices, or any number of peripheral devices.
  • the peripheral units 120a and 120b are connected to the center 110 via a line 115.
  • the line 115 is a bus connection.
  • the peripheral units 120a and 120b each have a memory device 130, which comprises a plurality of memory locations 131, 132, 133.
  • a test signal for checking the intelligibility of acoustic signals which can be reproduced by the peripheral unit 120a, 120b is stored in each memory location 131, 132, 133.
  • the number of memory locations depends on the respective needs and is between one and as many as desired. In FIG. 1 For example, three memory locations 131, 132, 133 are shown.
  • a further memory device 140 is also provided, which comprises a certain number of memory locations 141, 142, 143 for predetermined acoustic alarm messages. Again, the number depends on the needs and will be between one and any number. In the in FIG. 1 For reasons of clarity, only the three memory locations 141, 142 and 143 are shown.
  • the acoustic reproduction device comprises an amplifier 160 and an electroacoustic transducer 162 embodied as a loudspeaker.
  • the selected signal is brought to the required level in the amplifier 160 and reproduced with the electroacoustic transducer 162.
  • the position of the switch 150 is set in the center 110, and the required information is forwarded to the control device 122 via the bus connection 115.
  • the controller 122 converts these signals so that the switch 150 assumes the correct position.
  • the controller 122 further turns on the amplifier 160.
  • peripheral units 120a and 120b must of course also be supplied with electrical energy. This is done in a known manner via a feed line, for reasons of clarity in FIG. 1 not shown.
  • FIG. 2 shows a peripheral unit 220, which differs from the peripheral unit 120a and 120b only in that the internally provided test signals are not stored but if necessary by means of a calculation device 235 are calculated.
  • the calculation device 235 has a feedback shift register 237.
  • the feedback shift register 237 may generate in a known manner pseudo-random noise signals which are particularly suitable for an objective measurement of the intelligibility of acoustic test signals output by the peripheral unit. Namely, the pseudo-random noise signals can be generated reproducibly, so that there are precisely defined conditions for an automatic evaluation of the acoustic test signals.
  • a switch 250 can now be set between different memory locations 241, 242, 243, in each of which an alarm signal is stored, and an output of the calculation device 235. In this way, either the corresponding alarm signals or a calculated test signal can be supplied to an amplifier 260.
  • peripheral unit 220 The other components of the peripheral unit 220 are associated with the corresponding components of FIG FIG. 1 shown peripheral units 120a, 120b identical and will therefore not be explained again in detail at this point.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Electromagnetism (AREA)
  • Alarm Systems (AREA)
EP07120622A 2007-11-14 2007-11-14 Préparation de signaux de contrôle pour le contrôle de l'intelligibilité de signaux acoustiques d'un système de signalement de dangers Withdrawn EP2065862A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07120622A EP2065862A1 (fr) 2007-11-14 2007-11-14 Préparation de signaux de contrôle pour le contrôle de l'intelligibilité de signaux acoustiques d'un système de signalement de dangers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07120622A EP2065862A1 (fr) 2007-11-14 2007-11-14 Préparation de signaux de contrôle pour le contrôle de l'intelligibilité de signaux acoustiques d'un système de signalement de dangers

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EP2065862A1 true EP2065862A1 (fr) 2009-06-03

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006091335A2 (fr) * 2005-02-23 2006-08-31 Honeywell International, Inc. Procedes et systemes de mesure d'intelligibilite de systemes d'annonce audio
EP1806709A2 (fr) * 2005-12-29 2007-07-11 Honeywell International, Inc. Système et procédé de détection et de localisation acoustiques de dispositifs d'alarme sonores

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006091335A2 (fr) * 2005-02-23 2006-08-31 Honeywell International, Inc. Procedes et systemes de mesure d'intelligibilite de systemes d'annonce audio
EP1806709A2 (fr) * 2005-12-29 2007-07-11 Honeywell International, Inc. Système et procédé de détection et de localisation acoustiques de dispositifs d'alarme sonores

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