EP0142827A1 - Détecteur automatique de fumée et procédé pour leur fabrication - Google Patents

Détecteur automatique de fumée et procédé pour leur fabrication Download PDF

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Publication number
EP0142827A1
EP0142827A1 EP19840113832 EP84113832A EP0142827A1 EP 0142827 A1 EP0142827 A1 EP 0142827A1 EP 19840113832 EP19840113832 EP 19840113832 EP 84113832 A EP84113832 A EP 84113832A EP 0142827 A1 EP0142827 A1 EP 0142827A1
Authority
EP
European Patent Office
Prior art keywords
detector
housing
automatic fire
circuit carrier
converter
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.)
Ceased
Application number
EP19840113832
Other languages
German (de)
English (en)
Inventor
Dino Bettini
Romuald Dipl.-Ing. Von Tomkewitsch
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
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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, Siemens Corp filed Critical Siemens AG
Publication of EP0142827A1 publication Critical patent/EP0142827A1/fr
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
    • G08B17/11—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using an ionisation chamber for detecting smoke or gas
    • G08B17/113—Constructional details

Definitions

  • the invention relates to an automatic fire detector with a base, with a detector housing in which a plurality of detector connection contacts are arranged, with a detector circuit arrangement which has electronic components, with a physical-electrical converter, - with a measuring chamber and a housing cover, and on one Process for the production of automatic fire detectors ..
  • Automatic fire detectors indicate a physical-electrical converter that measures the fire parameter, e.g. Measures heat, smoke or radiation and converts it into electrical signals, as well as electronic circuitry that further processes the electrical signals.
  • the sensitivity or response sensitivity of such detectors must be kept within very narrow limits. Therefore, the inevitable exemplary tolerances, for example of the components, in particular the converter elements, must be compensated for by a function comparison. Either a certain operating point of the evaluation electronics is set or the gain of an amplifier is individually adapted to the sensitivity of the associated transducer elements.
  • Such an adjustment is generally carried out by adjusting potentiometers or by soldering adjustment elements on largely completed detectors.
  • a before Adjusting the electronic circuit is not useful in most cases because the essential tolerances are caused by the converter elements.
  • the adjustment is therefore carried out on the assembled, functional detector.
  • the adjustment elements must be accessible from the outside, which requires preliminary construction work. For example, soldering support points for the adjustment elements or holes in the detector housing must be provided for reaching through the positioning tools. After the adjustment, ie after the adjustment process, the adjustment elements must be covered to prevent subsequent manipulation.
  • the adjustment of a detector can therefore only be partially automated.
  • the adjustment elements are often soldered in by hand. Such a comparison of fire detectors is very complex and therefore very expensive.
  • the object of the invention is to design an automatic fire detector and to specify a manufacturing method that a fully automatic function comparison is possible.
  • This object is achieved according to the invention in an automatic fire detector described at the outset by arranging the electronic components and a plurality of contact surfaces on the base side and the elements of the physical-electrical converter on the opposite side on a flat circuit carrier arranged in the detector housing and together a converter assembly form that the converter assembly on the electrical side.
  • Components has a sealing elastic sheath that engages around the outer edge of the circuit carrier and forms a sealing bead, the sheath resting on the contact surfaces in the area of the contact pin that is biased in the axial direction in the detector housing te are arranged with tips that pierce the sheath and form an electrical connection with the contact surfaces, and that the transducer assembly on the outer edge of the circuit carrier is pressed non-positively with a fastener against the housing edge.
  • the electrical components and the contact surfaces are arranged on the one side, which faces the base, and the elements of the physical-electrical converter on the other side of the circuit carrier. Together, this forms the transducer assembly, which is arranged tightly in the detector housing with the component side.
  • the converter assembly is provided on the component side with a sealing, elastic sleeve, which encompasses the outer edge of the circuit carrier.
  • the sheath lies flat on it, so that contact pins arranged in the detector housing pierce the sheath with their tips and contact the transducer module used in the detector.
  • the contact pins are resiliently biased in the axial direction.
  • a fastening element is provided, which can be, for example, a union nut, which presses the converter assembly with the sleeve encompassing the circuit carrier, which forms a sealing bead on the outer edge of the circuit carrier, against the edge of the housing.
  • An automatic fire detector designed in this way has the advantage that the tolerance-sensitive transducer components are arranged on one side, the components of the electrical circuit and any adjustment components are arranged on the opposite side of the subrack. There is a full car in a matching machine Functional adjustment possible. For this purpose, the side with the transducer elements is brought into a simulation chamber in which a defined fire size is simulated, while the automatic adjustment is carried out on the component side in a manner known per se.
  • a rigid intermediate layer can expediently be provided between the fastening element and the sealing bead, which surrounds the circuit carrier all around. This has the advantage that the force of the fastener, which is a terminal - may or screw, is more evenly distributed, so that the electronics are sealed as well as possible against the surrounding atmosphere, and that the energy distribution of the circuit board is not damaged when jamming due .
  • the cover advantageously consists of a flexible, mechanically deformable, electrically non-conductive material, for example of a non-evaporation rubber.
  • this has the advantage that the sealing edge or bead ensures a good seal.
  • the flexible bottom of the shell which runs at least partially parallel to the circuit carrier, compensates for barometric fluctuations in air pressure like a membrane. This reduces the leak rate at the edge of the seal because no negative pressure can arise inside the casing.
  • the circuit carrier can be formed by a circuit board with components arranged thereon or by a ceramic carrier with a hybrid layer circuit.
  • contact pins with sharp conical tips arranged in the detector housing can pierce the sheath and form an electrically conductive connection with the contact surfaces of the circuit carrier.
  • the cone of the contact pins gives the deformable sleeve material a good seal, which can be provided in a further development of the invention with an additional sealing ring on the contact pins in order to improve the seal if necessary.
  • the contact pins are placed on a spring in the base, which they press permanently against the contact surface in the axial direction.
  • the springs and the detector connection contacts can each be formed as one part.
  • the object is achieved by a method for manufacturing automatic fire detectors in that the converter assemblies are manufactured and compared in multiples, then separated, and a converter assembly is installed in each case in the detector housing, and in that a possibly additional converter element and the housing cover are placed on the housing or on the base.
  • This manufacturing process allows the transducer assembly to be manufactured automatically, which can advantageously be manufactured in multiples, that is to say, in use.
  • the converter assembly can also be adjusted in terms of use, and can be adjusted fully automatically and then separated. Then the respective converter module in the detector. housing used.
  • at least one converter assembly is advantageously brought into a simulation chamber. A defined fire parameter is simulated in the simulation chamber for the adjustment.
  • the function of the detector is checked with the usual test equipment and the adjustment is carried out in a manner known per se.
  • a matching element required in each case can be automatically determined on the basis of the function measurement and fed to the circuit carrier.
  • the Adjustment element is automatically inserted into the circuit board and soldered.
  • the circuit carrier consists of a hybrid layer circuit
  • the adjustment is also carried out automatically.
  • the layer resistances can be compared in a manner customary with layer circuits today using a laser. In this way, one or more benefits can be compared in multiple ways. After these have been compared, the converter assemblies are removed from the simulation chambers and the next ones are placed in the simulation chambers. After that, the converter assemblies, which are manufactured and adjusted in multiples, are separated.
  • Fig. 1 shows an optical smoke detector based on the scattered light principle, shown in section.
  • a circuit carrier 1 which can either be a printed circuit board type or a layer circuit on a ceramic carrier material, carries on one side the electronic components 2. This side looks at the detector base 26.
  • On the other side of the circuit carrier 1 are in a very tolerant way Elements of the transducer arranged. In the exemplary embodiment, these are the light-emitting diode 3 and the photodiode 4. These are arranged such that the primary radiation 18 of the light-emitting diode 3 does not reach the receiving direction of the photodiode 4. In addition, apertures 17a are provided for this.
  • the base side of the circuit carrier 1 is surrounded by a sheath 5.
  • This sleeve 5 has on the outer edge la of the circuit carrier 1 a bead-like sealing edge 6 which surrounds the outer edge la of the circuit carrier 1.
  • the sleeve 5 lies flat on it.
  • the contact pins 11 arranged in the base 26 via springs 15 each have a sharp, conical tip 11a according to FIG. 2.
  • the sheath 5 is pierced by the tips 11a.
  • the connection contacts 16 of the base are connected to the circuit carrier 1 via the contact surfaces 13.
  • the cone shape of the tips 11a of the contact pins 11 ensure a good seal in the deformable sleeve material, which, if necessary, can be improved by sealing rings 12 arranged on the tips of the contact pins 11 (FIG. 2).
  • the transducer assembly 14 is pressed onto the housing edge 9a of the detector housing 9.
  • the circuit carrier 1 is pressed firmly against the housing edge 9a, so that the interior 5a of the converter assembly 14 is sealed against the surrounding atmosphere.
  • the measuring chamber is formed by the labyrinth 17, which shields the measuring chamber from extraneous light, but allows the smoke to enter.
  • the orifices 17a also belong to the measuring chamber.
  • the labyrinth 17 can be designed as a separate part. However, it can also be integrated in the housing cover (housing hood) 25, which is attached to the housing 9 of the detector.
  • FIG. 2 shows the automatic function comparison of a detector according to FIG. 1.
  • the converter assembly 14, which is manufactured in multiples 19, is compared in use.
  • the adjustment is carried out on the side of the electronic components 2 of the circuit carrier 1, which is indicated here with a laser 24 in the case of a layer circuit.
  • Needle-shaped contact pins 22 contact the circuit carrier 1 via the contact surfaces 13.
  • the transducer elements 3 and 4 are on the opposite side of the circuit carrier 1. They are introduced into a simulation chamber 21 which has panels 20 and a labyrinth similar to the detector according to FIG. 1.
  • Smoke 23 of defined density is blown into the simulation chamber 21 through the opening on the side. With standard test equipment, the function of the detector. checked and the comparison made.
  • an additional trimming element for example a resistor
  • the converter assemblies 14, which are manufactured in multiples, can thus be brought into the simulation chamber 21 one after the other and then compared.
  • FIG. 4 shows circuit carrier 1, which has been manufactured in many cases, seen from the component side (2).
  • the fire detector designed according to the invention offers the advantage of fully automatic function comparison, so that a reliable function of the electronics is guaranteed.
  • the converter modules (14) or circuit carrier 1 are separated after the adjustment. Then the sleeve 5 is pushed over it, then the transducer assembly is installed in the detector, as already explained above.
  • the fire detector according to the invention has the advantage of replacing the converter assembly with another if the detector is defective or is being serviced.
  • the fire detector according to the invention it is more efficient for the fire detector according to the invention to discard the outer parts of the detector, for example the detector housing, the labyrinth, the casing, and possibly also the base, and only the electronic assembly with the transducer elements, ie the transducer assembly to continue using. Both cases can be used as simply as possible, because dismantling the detector is as easy as installing it.
  • heat detectors with hot or cold conductors or ion detectors with radioactive sources can be designed, manufactured and calibrated as converter elements in accordance with the fire detector according to the invention.

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  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fire-Detection Mechanisms (AREA)
EP19840113832 1983-11-18 1984-11-15 Détecteur automatique de fumée et procédé pour leur fabrication Ceased EP0142827A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833341781 DE3341781A1 (de) 1983-11-18 1983-11-18 Automatischer brandmelder und verfahren zur fertigung automatischer brandmelder
DE3341781 1983-11-18

Publications (1)

Publication Number Publication Date
EP0142827A1 true EP0142827A1 (fr) 1985-05-29

Family

ID=6214684

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19840113832 Ceased EP0142827A1 (fr) 1983-11-18 1984-11-15 Détecteur automatique de fumée et procédé pour leur fabrication

Country Status (2)

Country Link
EP (1) EP0142827A1 (fr)
DE (1) DE3341781A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0299410A3 (en) * 1987-07-14 1989-04-26 Siemens Aktiengesellschaft Berlin Und Munchen Optical smoke detector
GB2217495A (en) * 1988-04-08 1989-10-25 Matsushita Electric Works Ltd Ceiling mounted fire detector assembly
US7553071B2 (en) * 2003-05-16 2009-06-30 Sitronic Gesellschaft für Elektrotechnische Ausrüstung mbH & Co. KG Sensor unit
CN113643505A (zh) * 2021-08-09 2021-11-12 中铁二院工程集团有限责任公司 一种列车火灾联动及建模验证方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015004458B4 (de) 2014-06-26 2016-05-12 Elmos Semiconductor Aktiengesellschaft Vorrichtung und Verfahren für einen klassifizierenden, rauchkammerlosen Luftzustandssensor zur Prognostizierung eines folgenden Betriebszustands
DE102014019773B4 (de) 2014-12-17 2023-12-07 Elmos Semiconductor Se Vorrichtung und Verfahren zur Unterscheidung von festen Objekten, Kochdunst und Rauch mittels des Displays eines Mobiltelefons
DE102014019172B4 (de) 2014-12-17 2023-12-07 Elmos Semiconductor Se Vorrichtung und Verfahren zur Unterscheidung von festen Objekten, Kochdunst und Rauch mit einem kompensierenden optischen Messsystem

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH508251A (de) * 1970-07-23 1971-05-31 Cerberus Ag Ionisationsfeuermelder
FR2108895A1 (fr) * 1970-10-16 1972-05-26 Gamma Electronic
CH597658A5 (fr) * 1975-02-10 1978-04-14 Hochiki Co
DE2937707A1 (de) * 1979-03-01 1980-09-04 Solomon Elias E Rauchdetektor
EP0016351A1 (fr) * 1979-03-16 1980-10-01 Cerberus Ag Détecteur de gaz à utiliser dans un milieu menacé par des explosions

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH508251A (de) * 1970-07-23 1971-05-31 Cerberus Ag Ionisationsfeuermelder
FR2108895A1 (fr) * 1970-10-16 1972-05-26 Gamma Electronic
CH597658A5 (fr) * 1975-02-10 1978-04-14 Hochiki Co
DE2937707A1 (de) * 1979-03-01 1980-09-04 Solomon Elias E Rauchdetektor
EP0016351A1 (fr) * 1979-03-16 1980-10-01 Cerberus Ag Détecteur de gaz à utiliser dans un milieu menacé par des explosions

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0299410A3 (en) * 1987-07-14 1989-04-26 Siemens Aktiengesellschaft Berlin Und Munchen Optical smoke detector
GB2217495A (en) * 1988-04-08 1989-10-25 Matsushita Electric Works Ltd Ceiling mounted fire detector assembly
US4887073A (en) * 1988-04-08 1989-12-12 Matsushita Electric Works, Ltd. Ceiling mounted fire detector assembly
GB2217495B (en) * 1988-04-08 1992-05-20 Matsushita Electric Works Ltd Ceiling mounted fire detector assembly
US7553071B2 (en) * 2003-05-16 2009-06-30 Sitronic Gesellschaft für Elektrotechnische Ausrüstung mbH & Co. KG Sensor unit
CN113643505A (zh) * 2021-08-09 2021-11-12 中铁二院工程集团有限责任公司 一种列车火灾联动及建模验证方法
CN113643505B (zh) * 2021-08-09 2023-01-20 中铁二院工程集团有限责任公司 一种列车火灾联动及建模验证方法

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Publication number Publication date
DE3341781A1 (de) 1985-05-30

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19841128

AK Designated contracting states

Designated state(s): AT BE DE FR GB IT NL SE

17Q First examination report despatched

Effective date: 19860825

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Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 19871207

RIN1 Information on inventor provided before grant (corrected)

Inventor name: VON TOMKEWITSCH, ROMUALD, DIPL.-ING.

Inventor name: BETTINI, DINO