EP0971329A1 - Vorrichtung zur Überprüfung der Funktion von Streulichtrauchmeldern - Google Patents
Vorrichtung zur Überprüfung der Funktion von Streulichtrauchmeldern Download PDFInfo
- Publication number
- EP0971329A1 EP0971329A1 EP99112527A EP99112527A EP0971329A1 EP 0971329 A1 EP0971329 A1 EP 0971329A1 EP 99112527 A EP99112527 A EP 99112527A EP 99112527 A EP99112527 A EP 99112527A EP 0971329 A1 EP0971329 A1 EP 0971329A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pulses
- light source
- adapter
- detector
- measuring
- 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.)
- Granted
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Classifications
-
- 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
- G08B29/14—Checking intermittently signalling or alarm systems checking the detection circuits
- G08B29/145—Checking intermittently signalling or alarm systems checking the detection circuits of fire detection circuits
Definitions
- the measuring light source and the additional light receiver of the Detector tester as well as the test light source and the measurement light receiver defined relative positions one in which it is ensured that the light pulses of the measuring light source on the additional Light receiver and the light flashes of the test light source on the measuring light receiver reach. Since the positioning means indicate the presence of appropriate guide means the smoke detectors, this detector tester is only for detectors of a certain type usable and can not be used in principle on detectors without such guide means become.
- the invention is now intended to provide a detector tester that is in any alignment position works perfectly compared to the detector to be tested and is therefore universal can be used and can be easily adapted to different detector types.
- the measuring light source is no longer used emitted light pulses detected as such, but by the triggering the light pulses Current pulses generated an electromagnetic field. Since this field is the detector on all sides and surrounds relatively homogeneously, the detector tester can light pulses in any orientation Detect against the detector.
- a third preferred embodiment of the device according to the invention is characterized in that that the adapter is a rotationally symmetrical, open at one end, rifle or has a can-like shape and can be placed on or above the detector to be tested is slidable, and that the induction coil is arranged on the inside of the adapter.
- the induction coil is arranged on the inside of the adapter.
- the induction coil near the edge on the open side of the adapter or arranged on the floor opposite the open side.
- a fourth preferred embodiment of the device according to the invention is characterized in that that means are provided for reflecting the test light pulses into the measuring chamber are. These means for reflection of the test light pulses, which of course also means for their Scattering can ensure that the detector tester is in any orientation a sufficient proportion of the test light pulses directed towards the detector into the measuring chamber and arrives at the measuring light receiver.
- the detector tester according to the invention can in principle be used for testing for any type of Scattered light detectors are used, so that usually for the detector test used relatively expensive test gas can be dispensed with. This not only results in cost savings but also enables a much faster check of entire detector lines because every detector is fully functional immediately after the test and not as with the Test with test gas has a measuring chamber filled with the test gas and thereby through Follow-up alarms blocked further testing.
- the adapter in the manner of a remote control is preferably used in test laboratories where the Detectors to be tested are not mounted on the ceiling but on a plate or on a test table are, or for detectors mounted inside devices or air ducts, which are for the can-shaped adapters are difficult to access.
- Another preferred embodiment of the device according to the invention is characterized through an electronic circuit for synchronizing the triggering of the test light pulses with the light pulses of the measuring light source, which circuit a stage for fading of interference pulses from the signal supplied by the induction coil, which contains an amplifier and an electronically regulated voltage divider, with the regulated voltage divider automatically such a shift in the working point of the Amplifier takes place that the interference pulses are masked out by the pulses of the measuring light source caused measuring pulses are recognized correctly.
- the detector tester shown in Fig. 1 is used to check the function of smoke detectors on site, So usually from detectors mounted on the ceiling of a room, and is to this Purpose designed so that it is placed on the detector to be tested from above or over it can be pushed.
- the detector tester is particularly suitable for detectors whose Housing has approximately the shape of a spherical cap or a truncated cone.
- Detectors are, for example, in the international model protection registrations DM / 028 534 and DM / 034 103. This note is not limited to the detector types mentioned to understand; of course, the detector tester according to the invention with any minor adjustments can be used with practically all modern stray light smoke detectors.
- Smoke detector M directs the largest possible proportion of the test light pulses into the measuring chamber 5 and arrives at the measuring light receiver 7, can be in the level of the test light source 3 strip-shaped area of the inner wall of the detector tester with a reflective coating 8 be provided.
- the induction coil 2 detects that generated by each light pulse of the measuring light source 6 electromagnetic field and controls the test light source 3 so that it is within the stated Time window emits test light pulses.
- To bundle the electromagnetic Field on the induction coil 2 is the latter of a metallic open to the top Cylinder 9 surrounded by an electromagnetic on its upper face permeable film 10 can be covered. The film can also above the cylinder 9th be arranged.
- the test light source 3 is a flash lamp or flash tube, for example a xenon tube, formed, and the voltage converter 22 is used to provide the for the ignition of the Flash lamp required voltage.
- One of the voltage converter 22 is for lightning interference suppression serving connection 23 to the output stage 17 is provided.
- the measuring light source 6 (FIG. 1) formed, for example, by an infrared diode (IRED) transmits a light pulse at regular intervals of, for example, 1 to 3 seconds, whereby in the induction coil 2, a voltage pulse MP referred to below as the measuring pulse of about 100 ⁇ s duration is induced.
- This measuring pulse is very small and is a few Millivolts.
- the induction coil 2 is not only caused by the pulses of the measuring light source Voltage pulses induced, but also by the different communication currents on the detector lines. They differ from these interference pulses denoted by SP the measuring pulses MP essentially by their significantly lower frequency and by their duration.
- the voltage pulses induced in the induction coil 2 are in the first preamplifier stage 14 amplified and then the coarsest interference pulses in the high / low pass filter 15 filtered out.
- the signal After further amplification in the second preamplifier stage 16, the signal reaches the Power stage 17 and in stage 18 for glitch suppression and automatic gain control.
- an electronically controlled one Includes voltage divider and a storage capacitor, by a shift (offset) the operating point of the amplifier through the adjustable resistance, the measuring pulses MP and the interference pulses SP shifted to different sides with respect to the zero line, as shown the measuring pulses MP in the negative and the interference pulses SP in the positive range. Thereby the interference pulses SP can simply be hidden.
- the voltage divider automatic gain control Through the voltage divider automatic gain control.
- the output signal of the output stage 18 is still is contaminated by interference pulses, a further smoothing and takes place in the active time window 19 Attenuation of any disturbances that may still be present, as a result of which the measuring pulse MP is shown sawtooth-like shape.
- the flash is triggered when the measuring pulse MP exceeds a certain threshold.
- the threshold value must not be too low; on the other hand it must also not be too large, so that it also contains weaker light pulses from the measuring light source corresponding smaller measuring pulses can be triggered.
- SW the threshold value named and designated SW in the differential evaluation stage 20 placed in the middle of the rising edge.
- the stage 21 When the threshold value SW is exceeded by the rising edge of the measuring pulse MP, in the stage 21 generates a pulse for triggering the test light source (flash lamp) 3. That pulse has the rectangular shape shown and it preferably lasts somewhat longer than the measuring pulse MP, for example about 200 ⁇ s.
- the lightning interference suppression which is used to suppress the disruptive influence of the lightning Test light source 3 on the gain control is used because this for a short time after Flash trigger does not work as desired, is that the level 18 included Regulation is locked for the duration of the flash.
- the adapter contains at its end facing the detector to be tested during the test an exit window for the passage of the test light pulses and an infrared filter for them, see above that the flashes of light are no longer perceived as disturbing.
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- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
Description
- Fig. 1
- eine schematische Darstellung eines erfindungsgemässen Melderprüfers; und
- Fig. 2
- ein Blockschema der Schaltung zur Synchronisierung der Mess- und der Prüf-Lichtquelle.
Claims (12)
- Vorrichtung zur Überprüfung der Funktion von Streulicht-Rauchmeldern (M), welche eine Messkammer (5) mit einer Lichtpulse aussendenden Mess-Lichtquelle (6) und einen Mess-Lichtempfänger (7) aufweisen, mit einem Adapter (1), welcher eine synchron mit den Lichtpulsen der Mess-Lichtquelle betätigbare Prüf-Lichtquelle (3) zur Beaufschlagung des Mess-Lichtempfängers (7) mit Prüf-Lichtpulsen enthält, dadurch gekennzeichnet, dass der Adapter (1) einen auf das durch die Strompulse der Mess-Lichtquelle (6) erzeugte elektromagnetische Feld ansprechenden und die Prüf-Lichtquelle (3) steuernden Detektor (2) aufweist.
- Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der genannte Detektor durch eine Induktionsspule (2) gebildet ist.
- Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Adapter eine prismatische, schachtelartige Form aufweist und in der Art einer Fernbedienung gegen den zu prüfenden Rauchmelder (M) richtbar oder auf die Kuppe eines auf einer Unterlage liegenden Rauchmelders stellbar ist.
- Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass der Adapter an seinem dem zu prüfenden Melder (M) bei der Prüfung zugewandten Ende ein Fenster für den Durchtritt der Prüf-Lichtpulse sowie ein infrarotes Filter für diese enthält.
- Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der Adapter (1) eine rotationssymmetrische, an einem Ende offene, büchsen- oder dosenartige Form aufweist und auf den zu prüfenden Melder (M) aufsetzbar oder über diesen schiebbar ist, und dass die Induktionsspule (2) an der Innenseite des Adapters (1) angeordnet ist.
- Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass die Induktionsspule (2) in der Nähe des Randes an der offenen Seite des Adapters (1) oder an dem der offenen Seite gegenüberliegenden Boden angeordnet ist.
- Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass Mittel (8) zur Reflexion der Prüf-Lichtpulse in die Messkammer (5) vorgesehen, und dass diese Mittel durch einen an der Innenseite des Adapters (1) angeordneten reflektierenden Belag (8) gebildet sind.
- Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass die Prüf-Lichtquelle (3) in der Nähe des Randes an der offenen Seite des Adapters (1) angeordnet und der reflektierende Belag (8) durch einen dem genannten Rand benachbarten, streifenförmigen Bereich gebildet ist.
- Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, dass der die Induktionsspule (2) enthaltende Bodenteil des Adapters (1) durch eine Folie (10) abgedeckt ist.
- Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Prüf-Lichtquelle (3) durch eine Blitzlampe gebildet ist.
- Vorrichtung nach einem der Ansprüche 3 bis 10, gekennzeichnet durch eine elektronische Schaltung (4) zur Synchronisierung der Auslösung der Prüf-Lichtpulse mit den Lichtpulsen der Mess-Lichtquelle (6), welche Schaltung (4) eine Stufe (18) zur Ausblendung von Störpulsen (SP) aus dem von der Induktionsspule (2) gelieferten Signal aufweist, welche einen Verstärker und einen elektronisch geregelten Spannungsteiler enthält, wobei durch den geregelten Spannungsteiler automatisch eine solche Verschiebung des Arbeitspunktes des Verstärkers erfolgt, dass die Störpulse (SP) ausgeblendet und die durch die Pulse der Mess-Lichtquelle (6) verursachten Messpulse (MP) einwandfrei erkannt werden.
- Vorrichtung nach Anspruch 11, dadurch gekennzeichnet, dass während der Dauer jedes Prüflicht-Pulses eine Sperrung des Reglers der Stufe (18) zur Ausblendung von Störimpulsen erfolgt.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19990112527 EP0971329B1 (de) | 1998-07-10 | 1999-07-01 | Vorrichtung zur Überprüfung der Funktion von Streulichtrauchmeldern |
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98112822 | 1998-07-10 | ||
EP98112822A EP0971328A1 (de) | 1998-07-10 | 1998-07-10 | Vorrichtung zur Ueberprüfung der Funktion von Streulichtrauchmeldern |
CH75799 | 1999-04-23 | ||
CH75799 | 1999-04-23 | ||
EP19990112527 EP0971329B1 (de) | 1998-07-10 | 1999-07-01 | Vorrichtung zur Überprüfung der Funktion von Streulichtrauchmeldern |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0971329A1 true EP0971329A1 (de) | 2000-01-12 |
EP0971329B1 EP0971329B1 (de) | 2003-03-05 |
Family
ID=27172392
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19990112527 Expired - Lifetime EP0971329B1 (de) | 1998-07-10 | 1999-07-01 | Vorrichtung zur Überprüfung der Funktion von Streulichtrauchmeldern |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP0971329B1 (de) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6640608B2 (en) * | 2000-05-02 | 2003-11-04 | No Climb Products Limited | Ducted smoke or fire detector testing tool |
US7587926B2 (en) * | 2006-01-13 | 2009-09-15 | Hsi Fire & Safety Group, Llc | Method and apparatus for testing detectors |
DE10353837B4 (de) * | 2003-11-18 | 2017-05-24 | Robert Bosch Gmbh | Prüfeinrichtung für Brandmelder |
US10825334B2 (en) | 2016-07-19 | 2020-11-03 | Autronica Fire & Security As | Smoke detector operational integrity verification system and method |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2369746A1 (fr) * | 1976-10-26 | 1978-05-26 | Matsushita Electric Works Ltd | Detecteur photoelectrique de fumee |
WO1989006412A1 (en) * | 1988-01-04 | 1989-07-13 | Pittway Corporation | Test initiation apparatus with continuous or pulse input |
WO1994018653A1 (de) * | 1993-02-15 | 1994-08-18 | Cerberus Ag | Vorrichtung zur funktionsprüfung von rauchmeldern |
EP0910055A2 (de) * | 1997-10-14 | 1999-04-21 | No Climb Products Limited | Prüfgerät für Detektoren |
-
1999
- 1999-07-01 EP EP19990112527 patent/EP0971329B1/de not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2369746A1 (fr) * | 1976-10-26 | 1978-05-26 | Matsushita Electric Works Ltd | Detecteur photoelectrique de fumee |
WO1989006412A1 (en) * | 1988-01-04 | 1989-07-13 | Pittway Corporation | Test initiation apparatus with continuous or pulse input |
WO1994018653A1 (de) * | 1993-02-15 | 1994-08-18 | Cerberus Ag | Vorrichtung zur funktionsprüfung von rauchmeldern |
EP0636266A1 (de) * | 1993-02-15 | 1995-02-01 | Cerberus Ag | Vorrichtung zur funktionsprüfung von rauchmeldern |
EP0910055A2 (de) * | 1997-10-14 | 1999-04-21 | No Climb Products Limited | Prüfgerät für Detektoren |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6640608B2 (en) * | 2000-05-02 | 2003-11-04 | No Climb Products Limited | Ducted smoke or fire detector testing tool |
DE10353837B4 (de) * | 2003-11-18 | 2017-05-24 | Robert Bosch Gmbh | Prüfeinrichtung für Brandmelder |
US7587926B2 (en) * | 2006-01-13 | 2009-09-15 | Hsi Fire & Safety Group, Llc | Method and apparatus for testing detectors |
US10825334B2 (en) | 2016-07-19 | 2020-11-03 | Autronica Fire & Security As | Smoke detector operational integrity verification system and method |
Also Published As
Publication number | Publication date |
---|---|
EP0971329B1 (de) | 2003-03-05 |
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