WO2011054662A1 - Dispositif de protection pour appareil électrique - Google Patents

Dispositif de protection pour appareil électrique Download PDF

Info

Publication number
WO2011054662A1
WO2011054662A1 PCT/EP2010/065688 EP2010065688W WO2011054662A1 WO 2011054662 A1 WO2011054662 A1 WO 2011054662A1 EP 2010065688 W EP2010065688 W EP 2010065688W WO 2011054662 A1 WO2011054662 A1 WO 2011054662A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
sensor
protection device
electrical
electrical device
Prior art date
Application number
PCT/EP2010/065688
Other languages
German (de)
English (en)
Inventor
Dieter Donis
Juergen Goetz
Lutz Mueller
Erwin Fischer
Original Assignee
Robert Bosch Gmbh
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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2011054662A1 publication Critical patent/WO2011054662A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0201—Thermal arrangements, e.g. for cooling, heating or preventing overheating
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/12—Actuation by presence of radiation or particles, e.g. of infrared radiation or of ions
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/18—Printed circuits structurally associated with non-printed electric components
    • H05K1/181—Printed circuits structurally associated with non-printed electric components associated with surface mounted components
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10007—Types of components
    • H05K2201/10121—Optical component, e.g. opto-electronic component
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10007—Types of components
    • H05K2201/10151—Sensor
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10007—Types of components
    • H05K2201/10181—Fuse

Definitions

  • the invention relates to a protective device for an electrical device according to the preamble of claim 1.
  • Such a protective device for an electrical device is from the
  • WO2004 / 002202A1 known. It describes a printed circuit board with a
  • Protective device is equipped against thermal overheating.
  • a melting bridge is used, the above a certain temperature
  • the arrangement of the protective device within the device is crucial for the time of triggering, since it requires a certain time from the time of overheating to the detection of overheating.
  • the intensity of the heat decreases sharply with the distance, whereby it may happen that a sensor designed as a melt bridge is too far away from the heat source and thus does not react.
  • the melt bridge is destroyed after its release and must be replaced for repair purposes.
  • the invention has the object, a protective device for an electrical device according to the preamble of claim 1 such that the reaction time is improved and the overheating detection is not limited by the arrangement of the sensor or is restricted.
  • This object is achieved in a protective device for an electrical device with the features of claim 1.
  • the invention is based on the idea of detecting a thermal overload by means of an optical sensor.
  • An advantage of this solution is that an optical sensor large parts of the device within its direct field of view, or by detection of
  • Reflections can also monitor outside the direct field of vision. In addition, overheating due to smoke or flames can be detected before the
  • Heat effect reaches the sensor, whereby the protective device reacts very early and thus further damage to the device can be avoided.
  • a plurality of sensors are arranged at different locations of the device.
  • a plurality of sensors are arranged at different locations of the device.
  • At least one sensor is arranged in operative connection with other points of the device by means of at least one light guide or a reflecting element.
  • This design makes it possible to use the sensor to monitor locations where mounting the sensor would be inconvenient or impossible. If multiple optical fibers are used to direct light to a sensor, this provides the ability to detect multiple locations of the instrument with a single light sensor and thus obtain the benefits of multiple light sensors with a single sensor.
  • the design of the optical sensor as a light sensor.
  • Such light sensors are characterized by the fact that their acquisition costs are low and that they have a low power consumption.
  • the light sensor measures a certain part of the light spectrum. Light is particularly suitable in the
  • near-infrared region i. Light in the wavelength range from 700 nm to 5 ⁇ . This wavelength range is little affected by disturbances by particles, such as those caused by smoke.
  • the optical sensor with a
  • Evaluation circuit coupled. Such an evaluation circuit makes it possible, depending on the application, to take various measures, for example, more
  • Detecting a thermal overload causes a power interruption. As a result, the components cool down and overheating is counteracted. Furthermore, consequential damage can be avoided.
  • the power interruption can be reversible, so that a restart, possibly after replacing the
  • the power interruption can be done in a further embodiment of the invention by a self-destructing device.
  • a self-destructing device for example, a
  • Pyrotechnische be used, which destroys itself when exceeding a certain temperature. It has the advantage that it is easily replaceable and the power supply is permanently interrupted, whereby subsequent malfunctions are excluded.
  • the electrical device is preferably a control device in a motor vehicle.
  • a protective device according to the invention makes sense, since the control unit can be arranged at a critical point, for example in the engine compartment, so that in particular a spread of fire severe consequences until
  • Vehicle fire can have. It is advantageous if the electrical device has a housing which is designed to be opaque in particular, as a result of which its interior is protected against external light influences which otherwise can lead to false triggering or require a more complex evaluation circuit.
  • Fig. 1 shows a simplified illustrated control unit in longitudinal section below
  • Fig. 2 is a comparison with the Fig. 1 modified control device in longitudinal section using a photodiode and a light guide.
  • FIG. 1 shows an electrical device 1 designed as a control device. It has a particular multi-part housing 10, made of
  • a circuit board 12 is arranged in the housing 10.
  • the plug-in device 14 On the outside of the housing is a plug-in device 14 for the electrical connection of external connections to the board 12, for example for connection a wiring harness of a motor vehicle.
  • the plug-in device 14 has two
  • Headers 15 and 16 which in turn arranged perpendicular to the plane of connection pins 17 and 18, via rigid lines 19 and 20 with
  • a light sensor in the form of a photodiode 22 and a coupled to the photodiode 22 electronic evaluation circuit 23 in the form of one or more electrical components are arranged. Also located at the top of the board 12 more electrical components as part of an electrical or electronic circuit.
  • the underside 24 of the board 12 is also a light sensor, in particular again in the form of a coupled to the evaluation circuit 23 photodiode 25.
  • the photodiodes 25, 35 and the evaluation circuit 23 are part of a fire detection device 100 for the electrical device. 1
  • the latter photodiode 25 is required because of the underside 24 of the board 12 can not get light to the first photodiode 22 on the board top 24 because the board 12 is an impenetrable obstacle to the light and the board 12 of the housing 10 at least almost is surrounded without a gap. Also located on the bottom 24 more components as part of the electrical or
  • the two photodiodes 22 and 25 are each arranged near the central region 26 of the board 12 so that they can cover or monitor the largest possible area of the inner space 11 in the housing 10.
  • the photodiodes 22, 25 are advantageously designed such that they detect light in the near-infrared region, since this light region is less susceptible to disturbances by particles, such as, for example, smoke.
  • the inner side 29 of the housing 10 or the components of the electrical or electronic circuit or the circuit board 12 may be formed metallized or mirrored, so that the light of any flames is reflected at them and thus reaches one of the photodiodes 22 or 25.
  • Reflection or an improvement in the reflection properties of the surfaces is understood to mean that less light is absorbed by surfaces and these Thus, the reflected light rays on arrival at the photodiode 22, 25 a higher remaining light intensity - compared to surfaces with bad
  • Photodiodes change their operating point depending on the intensity of the incident light.
  • the photodiodes 22 and 25 connected to the evaluation circuit 23 monitor in which operating point the photodiodes 22 and 25 are located. It can also be provided that the signal of the respective photodiode 22 and 25 and the evaluation circuit 26 is amplified or processed in a different way.
  • the fire detection device 100 described above operates as follows
  • the upper photodiode 22 If it comes on the top 21 of the board 12 to a fire, e.g. due to a thermal overload of components of the electrical or electronic circuit and associated flame formation, it is detected by the upper photodiode 22 by the light rays of the flames, either directly or through
  • the photodiode 22 responds to the light rays by turning on its
  • Evaluation circuit 23 taken appropriate action. These measures can be done in different ways, for example, by the fact that
  • the power supply of the controller is interrupted as quickly as possible and thus further heat generation of the control unit is prevented.
  • Power interruption can take place in that the evaluation circuit 23 controls a self-destructive pyro fuse, so that a reconnection of the electrical device 1 is reliably prevented.
  • Vehicle control whose failure would result in an uncontrollable behavior of the vehicle.
  • no photodiode is mounted on the underside 24 of the board 12.
  • the components 32 and 33 of the electrical or electronic circuit on the underside 24 of the board 12 each optically detect by means of a light guide 34, 35 and a reflective element of the photodiode 22 on the top 21 of the board 12.
  • the one ends 36 and 37 of the optical fibers 34 and 35 are respectively coupled to the components 32 and 33.
  • the other ends 38 and 39 of the optical fibers 34 and 35 are coupled to the photodiode 22.
  • the light guides 34 and 35 penetrate the board 12 respectively through correspondingly formed through holes in the board 12th
  • Fire detection device then has for each device, one or more sensors or in the form of photodiodes or optical fibers, from a central
  • Evaluation be controlled or monitored. Furthermore, it is also conceivable to use other optical sensors, for example camera devices, instead of photodiodes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fire-Detection Mechanisms (AREA)

Abstract

La présente invention concerne un dispositif de protection (100) destiné à un appareil électrique (1), comprenant un capteur destiné à détecter une surcharge thermique. Selon l'invention, le capteur est un capteur optique (22, 25) qui réagit à la lumière.
PCT/EP2010/065688 2009-11-06 2010-10-19 Dispositif de protection pour appareil électrique WO2011054662A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009046490.5 2009-11-06
DE102009046490A DE102009046490A1 (de) 2009-11-06 2009-11-06 Schutzeinrichtung für ein elektrisches Gerät

Publications (1)

Publication Number Publication Date
WO2011054662A1 true WO2011054662A1 (fr) 2011-05-12

Family

ID=43301859

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2010/065688 WO2011054662A1 (fr) 2009-11-06 2010-10-19 Dispositif de protection pour appareil électrique

Country Status (2)

Country Link
DE (1) DE102009046490A1 (fr)
WO (1) WO2011054662A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3350702A (en) * 1965-01-26 1967-10-31 Ruth A Herman Infrared detection system for fault isolation and failure prediction
WO2004002202A1 (fr) 2002-06-21 2003-12-31 Continental Teves Ag & Co. Ohg Plaquette pour boitiers de commande electroniques pour vehicules
US20040109415A1 (en) * 2002-12-09 2004-06-10 Zoltan Zansky Fire protection for electronics equipment
DE102006038035A1 (de) * 2006-08-14 2008-02-21 Siemens Ag Vorrichtung und Verfahren zur Überwachung einer mit elektronischen Bauelementen bestückten Platine

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2756315A1 (de) * 1977-12-17 1979-06-21 Stausberg Verfahren zum keimfreimachen von fluessigkeiten, insbesondere schwimmbadwasser mittels uv-strahlung und einrichtung zur durchfuehrung des verfahrens
JPH09311019A (ja) * 1996-05-22 1997-12-02 Toyota Central Res & Dev Lab Inc 蛍光物質混合液，膜厚測定方法及び装置
US6640199B1 (en) * 2001-10-24 2003-10-28 Spectral Sciences, Inc. System and method for optically determining properties of hot fluids from the spectral structure of emitted radiation
US20060044727A1 (en) * 2004-08-30 2006-03-02 Aboyade Oj Thermal optical circuit interruption system
US7151872B1 (en) * 2005-11-22 2006-12-19 General Electric Company Method, system and module for monitoring a power generating system
DE102007033427A1 (de) * 2007-07-18 2009-01-22 Robert Bosch Gmbh Anordnung mit einem Gehäuse

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3350702A (en) * 1965-01-26 1967-10-31 Ruth A Herman Infrared detection system for fault isolation and failure prediction
WO2004002202A1 (fr) 2002-06-21 2003-12-31 Continental Teves Ag & Co. Ohg Plaquette pour boitiers de commande electroniques pour vehicules
US20040109415A1 (en) * 2002-12-09 2004-06-10 Zoltan Zansky Fire protection for electronics equipment
DE102006038035A1 (de) * 2006-08-14 2008-02-21 Siemens Ag Vorrichtung und Verfahren zur Überwachung einer mit elektronischen Bauelementen bestückten Platine

Also Published As

Publication number Publication date
DE102009046490A1 (de) 2011-05-12

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