EP0535029B1 - Dispositif de signalisation d'une temperature donnee, capteur de temperature approprie et methode de fabrication de celui-ci - Google Patents

Dispositif de signalisation d'une temperature donnee, capteur de temperature approprie et methode de fabrication de celui-ci Download PDF

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Publication number
EP0535029B1
EP0535029B1 EP91910757A EP91910757A EP0535029B1 EP 0535029 B1 EP0535029 B1 EP 0535029B1 EP 91910757 A EP91910757 A EP 91910757A EP 91910757 A EP91910757 A EP 91910757A EP 0535029 B1 EP0535029 B1 EP 0535029B1
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Prior art keywords
output
status
reporting
alarm signal
sensors
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German (de)
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EP0535029A1 (fr
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Heinz Bauer
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Dylec Ltd
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Dylec Ltd
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    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B26/00—Alarm systems in which substations are interrogated in succession by a central station

Definitions

  • the invention relates to a condition reporting device of the type specified in the preamble of claim 1, a temperature sensor suitable therefor according to the preamble of claim 12 and a method for its production according to the preamble of claim 14.
  • Known status reporting devices of the above-mentioned type serve the purpose of emitting an alarm signal when an extreme temperature condition occurs and at the same time making it clear which of the temperature sensors involved has triggered the alarm signal (US-A-4,340,886, EP-A-0 004 911, GB -A-2 174 525, Electronics Weekly No. 778, August 13, 1975, Electronic Design, Volume 13, No. 1, January 10, 1985, DE-A-31 28 811).
  • the temperature is monitored e.g. for fire detection or temperature monitoring e.g. of motors, bearings, ovens or cooling systems.
  • Thermocouples, resistance temperature sensors, temperature-sensitive diodes, mercury switches or the like serve as temperature sensors, but also e.g. Common fire detectors or glass break detectors, all of which are characterized by relatively slow response times, low sensitivity and large dimensions.
  • the condition reporting device described at the outset should be suitable not only for temperature monitoring, but also for automatically triggering an extinguishing system, as is the case, for example, in aircraft, tanks, dangerous goods tankers or the like. because of the often explosive fires there is desirable and necessary.
  • the invention is therefore also based on the object of proposing a temperature sensor which is particularly suitable for such a status reporting device and a method for its production.
  • the invention has the advantage that it enables sensible use of thermistors and thereby their known advantages such as e.g. uses small dimensions, short response times and high sensitivity.
  • temperature sensors are proposed which enable a temperature measurement of the air surrounding them, but at the same time are kept very small and can nevertheless be effectively protected against mechanical damage and are therefore particularly suitable for use in confined spaces.
  • the method according to the invention creates a possibility of manufacturing such temperature sensors in such a way that the casting compound on the one hand also at temperatures to be measured of e.g.
  • condition reporting device in overheating or fire detection systems, such as in house installations, in the detection of tire overheating in trucks, in power plants or in shipping as well as automatic extinguishing systems in public and private buildings.
  • the status reporting device can also be used as part of a control system. In connection with the electronics, this results in further additional application options such as in the field of air conditioning or heating control.
  • thermistor 1 shows a temperature sensor according to the invention with a thermistor 1 in the form of a pearl thermistor (eg M 812 from Siemens AG, D-8000 Munich 80) there is a thermistor bead or a semiconductor bead 4 enclosed in a thin, short glass tube 2 and arranged at its tip 3, to which two connecting wires 5 are fastened, which lead out of the glass tube 2.
  • a thermistor 1 available on the market useful for the purposes of the invention, it is combined with a preferably cylindrical plug housing 6, which has an intermediate part 7, a hollow end section 8 attached to one side thereof and another on its other side attached, designed as a conventional, 2 or 3-pin connector base 9.
  • the connecting wires 5 are inserted into the hollow cylindrical ends of plugs 10 and firmly connected to the plugs 10 by crimping (crimping) in order to avoid that any soldering mass or the like that is used can melt and run away during the subsequent casting of the end section 8.
  • the plugs 10 are then inserted through bores which are formed in an insert (not shown) which fills the intermediate part 7 in such a way that the arrangement shown in FIG. 1 a results in which the free ends of the plugs 10 protrude into the hollow bottom 9.
  • the connectors 10 are preferably firmly locked in the insert by elements acting in the manner of a snap connection.
  • the glass tube 2 is preferably arranged so that it is arranged parallel and coaxially to the axis of the connector housing 6 and the thermistor bead 4 is arranged at the end of the end section 8 facing away from the intermediate part 7.
  • the hollow end section 8 is now filled with a casting compound 11 so that the entire glass tube 2, with the exception of its tip 3, is embedded in the casting compound 11.
  • the tip 3 with the semiconductor bead 4 protrudes out of the connector housing 6 or the potting compound 11, which on the one hand results in a mechanically stable sensor, and on the other hand creates a very sensitive and very quickly responding temperature sensor which detects the temperature of the surrounding air measures and reacts to temperature changes, the smaller the area of the semiconductor bead 4 to be heated is.
  • response times of the order of half a second can be achieved, which is particularly important for rapid fire detection and fighting.
  • the desired triggering temperature is in the range from 80 ° C. to 300 ° C. to approximately ⁇ 1 ° C. can be set.
  • a preferably cylindrical protective cap 12 can be screwed onto the end section of the connector housing 6, which is either open at the outer end and / or with a plurality of openings is provided so that the air, the temperature of which is to be monitored, can flow around the tip 3 and thus the semiconductor bead 4.
  • the thermistor bead 4 is arranged at a preselected location within the protective cap 12 and the sealing compound 11 is filled into the protective cap to such a height h that in turn only the tip 4 with the semiconductor bead 4 protrudes from the sealing compound 11 .
  • the protective cap 12 forms an inseparable unit with the plug housing 6.
  • the introduction of the sealing compound 11 into the end section 8 must be done with extreme caution. Otherwise the potting compound 11 will either be too soft with the result that it will be in the temperature range to be monitored, e.g. 80 ° C to 300 ° C flowable and thereby the mechanical stability of the sensor is impaired, or becomes too hard with the risk that the tip 3 of the glass tube 2 jumps off and the sensor becomes unusable.
  • Casting compounds which have been found to be useful are those which are produced from thermosetting epoxy resins and which have high thermal conductivity and a coefficient of thermal expansion comparable to that of copper.
  • the end section 8 must, however, be filled as follows when using this casting resin:
  • the sensor is first manufactured in the manner described.
  • a potting compound is then produced by mixing the sealant and the hardener in a mixing ratio (weight ratio) of 10: 1 to 10: 1.1.
  • the potting compound is then filled into the end section 8, which is preferably preheated to approximately 80 ° C., and preheated to 80 ° C. in a heating oven.
  • the subsequent curing takes place in three heating levels in the heating furnace, first for 16 hours at 80 ° C, then for 3 hours at 120 ° C and finally again for 3 hours at 180 ° C.
  • the heater is then reset to 80 ° C and switched off when this temperature is reached.
  • the ready-to-use temperature sensor with cast-in thermistor can be removed from the oven.
  • the sensor can be made of different materials.
  • the connector housing is preferably made of metal and the insert is made of an electrically non-conductive plastic with the required resistance to the temperatures that may occur.
  • a potting compound 11 made of a non-conductive material it also provides the necessary insulation.
  • the senor manufactured according to the method described above can be used anywhere for temperature measurement or temperature monitoring in a temperature range of approximately - 60 ° C to 900 ° C and can either function as a thermometer or thermostat.
  • An excellent application is described below using a fire detection system with a range of e.g. describes seven identical temperature sensors attached to different danger zones.
  • Fig. 2 shows the circuit of a power supply for operating the circuits shown in the following figures with a constant voltage V A of, for example, + 5 V ⁇ 1% according to the usual IC technology.
  • the input voltage can be selected between, for example, + 8 V and + 32 V, is applied to an input line 21 provided with a fuse Si 1 and, in the exemplary embodiment, is + 24 V.
  • a tens diode ZD 1 eg BZT 03 / D39
  • a capacitor C1 for smoothing larger voltage fluctuations.
  • Two in the lines 21 and 22 connected diodes D1 and D2 (eg 1 N 4007) serve as polarity protection.
  • Fig. 3 shows a transmitter unit 25, which contains seven thermistor temperature sensors Rs1 to Rs7 (eg M 812-100 k ⁇ 10%) in the exemplary embodiment, which are arranged at any desired locations of an aircraft, truck or the like, preferably 1 and are sensitive in the exemplary embodiment in the range from -55 ° C. to 350 ° C.
  • the ohmic resistance of the sensors Rs1 to Rs7 decreases with increasing temperature.
  • the sensors Rs1 to Rs7 therefore consist in the exemplary embodiment of resistors, one of whose connections are connected via a line 26 to the output line 23 of the power supply (FIG. 2).
  • the other connections are connected via resistors R14 to R20 (e.g.
  • a tens diode ZD2 to ZD8 (for example ZPD 6 V 2) is placed in order to subsequently secure the voltages at the outputs of the sensors Rs1 to Rs7 Limit circuits to 6.2 V.
  • the transmitter unit 25 in which the transmitter unit 25 is only shown schematically, its outputs 27 to 33 are each connected to an input of an evaluation circuit which can emit an alarm signal on an output line 35. In the exemplary embodiment, this always appears when the output signal at any output 27 to 33 of the transmitter unit 25 exceeds a preselected critical variable in the positive or negative direction as desired.
  • the evaluation device contains a single threshold switch IC51 in the form of an IC chip (eg LT 1017 IN8), the output (7) of which is connected to line 35.
  • This threshold switch IC51 is connected at its inverting input (6) with two adjustable resistors R6 (eg 10 k) and R7 (eg 20 k), by means of which a positive voltage can be set as a threshold at the inverting input (6).
  • the non-inverting input (5) is connected by means of a line 36 to which a resistor R5 (for example 1.62 k) connected to its other terminal is connected to the output (3) of an interrogation device IC3 in the form of another IC -Block (e.g. HEF 4051 BP) connected, which has seven inputs (1, 2, 5, 12 - 14) connected to an output 27 to 33 each and an input (4) connected to ground.
  • IC -Block e.g. HEF 4051 BP
  • a connected to the line 36 filter capacitor C4 serves to avoid voltage peaks.
  • the interrogation device IC3 are assigned means by means of which the inputs (1, 2, 5, 12-14) mentioned can be connected individually in succession and periodically to the output (3).
  • These means preferably consist of an oscillator in the form of a further IC module (eg HEF 4060 BP), which has three outputs (4, 5, 7), which are connected to three further inputs (9-11) of the interrogation device IC3 which clock signals appear with three different clock frequencies.
  • the oscillator IC2 is provided with an external circuit (e.g. R3, C3) according to the data sheet.
  • the input (13) of the interrogation device IC3 connected to the line 27 of the transmitter unit 25 is connected to its output (3), then the resistance of the sensor Rs1 and the resistors R14, R5 form a voltage divider.
  • the voltages and resistances are chosen so that at normal temperatures at the non-inverting input (5) a smaller voltage than at the inverting input (6) of the threshold switch IC51 appears, which is set to + 2.5 V, for example.
  • an output signal of 0 V is therefore emitted.
  • the setting can be selected so that the threshold is exceeded at a critical temperature of 180 ° C or any other temperature.
  • the alarm signal appears periodically whenever one of the sensors Rs1 to Rs7 is exposed to a temperature which is higher than the set threshold, and this alarm signal is retained until the next sensor by means of the interrogator IC3 the threshold switch IC51 is placed.
  • the line 35 of the evaluation device IC3 is connected to Fig. 4 with an input (4) of a monoflop IC6 (eg HFF 4538 BP), the output (10) via a series resistor R12 (eg 10 k) and an output line 37 of the evaluation device with the Circuit breaker T1 according to Fig. 5 is connected.
  • the monoflop IC6 is set by the appearance of each alarm signal at its output (10) for a preselected period of time, which can be set by means of an external circuit at other inputs (1, 2, 14, 15) according to the data sheet. This ensures that a sufficiently long signal to control the alarm and / or security device 20 is formed in the output line 37 even at a preferably very high polling frequency.
  • the line 35 is grounded via a high resistance R20 (e.g. 1 M). This ensures that the Monoflop IC6 in an extreme disturbance situation, e.g. in the event of a voltage drop due to a disconnected battery, is set to zero at the output (10) and does not inadvertently emit an output signal signaling an alarm state.
  • R20 e.g. 1 M
  • the interrogation device IC3 is a test device connected in parallel, which checks the proper functioning of the interrogation device IC3, in particular the sensors Rs1 to Rs bei and emits a further alarm signal if it does not function properly.
  • This test device contains a further interrogation device IC4 (eg HEF 4051 BP) corresponding to the interrogation device IC3 and one connected to its output (3) another threshold switch IC52 (eg LT 1017 IN 8), which is preferably combined with the threshold switch IC51 in a common housing, which has a further output (1) and two further inputs (2,3), which are assigned to the threshold switch IC52.
  • a further interrogation device IC4 eg HEF 4051 BP
  • another threshold switch IC52 eg LT 1017 IN 8
  • Analog to the interrogation device IC3 are inputs (1, 2, 4, 5, 12, 13, 15) of the interrogation device IC4 with the output lines 27 to 33 of the transmitter unit 25 and further inputs (9-11) with the outputs of an agent corresponding to the agent IC2 , preferably connected to the same oscillator IC2, so that the inputs (1, 2, 4, 5, 12, 13, 15) are connected accordingly to the output 3.
  • the output (3) of the interrogation device IC4 is connected to a line 38 leading to the non-inverting input (3) of the threshold switch IC ,2, to which a comparatively large resistor R5 (eg 46.4 k ) and a filter capacitor C5 are connected.
  • the voltage normally lying at the non-inverting input (2) of the threshold switch IC auf2 is set to a larger value than the voltage lying at the inverting input by means of resistors R und, R9, and the threshold switch IC52 with an operational sensor unit 25 and interrogation device IC3 has an output signal of e.g. + 5 V gives regardless of whether the monitored temperature corresponds to the preselected room temperature or the temperature preselected with the threshold value of the threshold switch IC51.
  • the voltage at the non-inverting input of the threshold switch IC52 falls to zero, with the result that an alarm signal of 0 V appears at the output (1), which is fed to a display device 39.
  • the further alarm signal therefore always appears when a defective sensor Rs1 to Rs7 is connected to the output (3) of the further interrogation device IC4 or another defect, e.g. Power failure, is present.
  • Each of the monoflop IC6 for a period of, for example, a few seconds on line 37 maintains the alarm signal in accordance with FIG. 5 through the circuit breaker T 1, for example a field effect transistor, at whose input (3) the 24 V voltage of the power supply (FIG. 2 ) is applied, which passes through the switching process to a control line 40 which leads to the alarm and / or security device 20.
  • the circuit breaker T 1 for example a field effect transistor
  • the alarm and / or security device 20 contains e.g. a warning lamp L1 connected via a diode D5 (e.g. IN 4007), which lights up when the alarm signal appears as long as the monoflop IC6 is set at the output (10).
  • a warning lamp L2 can be connected to the control line 40 via a further, corresponding diode D6, a resistor R21 (e.g. 220 k) and a third diode D8 (e.g. also IN 4007).
  • This is assigned a holding circuit which contains a switch T2 designed as a field effect transistor, the control input (2) of which is connected via a resistor R22 (eg 3 k) to the output of the diode D6 and via a Zener diode ZD9 to ground and whose voltage input ( 3) via a hand switch 41 on the line 24 coming from the power supply.
  • the output (5) of this switch T2 is on the one hand at the warning lamp L2 and on the other hand is fed back via the resistors R21 and R22 to the control input (2).
  • the warning lamp L2 therefore lights up continuously after triggering the switch T2, which e.g. has the advantage that a driver who has currently left his vehicle equipped with the condition reporting device described can determine on his return whether an alarm signal has meanwhile appeared or not. By briefly pressing the hand switch 41 to open the holding circuit, the alarm lamp L2 can be extinguished again.
  • the alarm and / or security device 20 can be used as security elements e.g. have at least two fire extinguisher bottles HR 1 and HR 2, which are provided with trigger capsules customary in fire protection systems.
  • the voltage input of the fire extinguishing bottle HR1 is e.g. via a diode D3 (e.g. 1N 4007) directly on the control line 40, while the voltage input of the fire extinguisher bottle HR2 is via a normally open switch 22 on line 24 of the power supply.
  • the fire extinguisher bottle HR1 is automatically triggered when an alarm signal appears to initiate a deletion process, while the fire extinguisher bottle HR2 can be operated manually or additionally by actuating the hand switch 42 when the fire extinguisher bottle HR1 is used up.
  • the diodes D3 to D8 are each polarized so that the currents flow only in the directions shown in Fig. 5 and no undesirable effects on uninvolved circuit parts can occur.
  • the display device 39 is e.g. constructed as follows:
  • a ground switch IC7 (eg CD 4099 BF), whose input (3) is connected to the output (1) of the threshold switch IC52, while three further inputs (5 - 7) of the ground switch IC7 with the outputs ( 4, 5, 7) of a means are connected, which periodically and individually activates the outputs (1, 9, 11 - 15) of the ground switch IC7.
  • the outputs (1, 9, 11 - 15) of the ground switch IC7 are each connected to an input of a keyboard 43 which is only schematically indicated in FIG. 4.
  • Each of these inputs leads over a push button switch TS 1 to TS 7 to the cathode of a control device 44 with its anode connected to the operating voltage, for example a light-emitting diode. If any of the push buttons TS 1 to TS 7 is pressed, then the cathode of the control device 44 is connected to the associated output of the ground switch IC7 via this push button switch.
  • the control device 44 would therefore always have to respond to the clock determined by the interrogation frequency of the oscillator IC2, for example light up when the output of the ground switch IC7 assigned to the actuated key switch is activated. If the control device 44 does not respond, then there is a defect because the associated output of the ground switch ICesch is not periodically connected to ground.
  • the alarm and / or security device 20 and the test device with the display device 39 assigned to them result in the advantage that a functional check can be carried out continuously while the entire system is in operation.
  • FIG. 7 shows a particularly preferred embodiment of the status reporting device according to the invention.
  • This consists of a standardized plug-in card or circuit board, which is soldered to an IC socket and on which all IC components, cabling and circuits are permanently mounted with the exception of those parts that should be individually changeable.
  • the IC components IC2 to IC4, IC51 and IC52, IC6 and IC7 are combined into a single IC component IC8, the inputs (1, 4, 5, 33, 34, 39, 51, 52) for connecting the Resistors R3 and R5 to R10 and the capacitors C3 to C5, further inputs (10, 20, 35 - 37) for applying the operating voltages or ground, further inputs (13 - 19) for applying the encoder unit 25 and outputs (54 - 62) for connecting the keyboard 43 or the like.
  • the IC module IC8 is used for a multiple number of different status messages or monitoring and can be combined with any encoder units and keyboards or other display devices. Depending on the sensors and display devices used in the individual case, it is only necessary to adapt some external switching elements shown in FIG. 7 accordingly.
  • IC module IC8 is otherwise preferably with that for Pour the sealant described temperature sensors and then cured for 16 hours at 80 ° C and 3 hours at 120 ° C. The rest of the procedure can then be carried out as when the temperature sensor is hardening. Due to the universal structure of such a module, it is possible to solve a multitude of monitoring tasks with almost identical means and by means of an optimized device that takes up little space.
  • the invention is not restricted to the exemplary embodiments described, which can be modified in many ways. This applies in particular to the temperature sensors used, in their place other temperature sensors and also sensors for completely different purposes, e.g. Cold conductors, strain gauges, infrared and other light sensors, voltmeters or the like can be used. It is only necessary to convert the measurement signals obtained in detail into usable signals for the electrical circuits described and to adjust the thresholds set at the threshold switches IC51 and IC52 accordingly. Furthermore, it goes without saying that other alarm and / or security devices and other display devices can be provided, the design of which largely depends on the type of the monitored states. In addition to visual displays, acoustic or other displays can of course also be provided.
  • sensors of different types or sensors for monitoring different types of states can be provided, although it is of course also possible to apply sensors of different types or sensors for monitoring different types of states to the circuit described, in particular the IC module IC8 according to FIG. 7, wherein only their output signals would have to be adjusted accordingly.
  • the invention is not limited to the use of the individually specified IC modules, which were only mentioned for example.

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  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Alarm Systems (AREA)
  • Fire Alarms (AREA)
  • Selective Calling Equipment (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)

Claims (14)

  1. Dispositif de signalisation d'une température donnée, comprenant une pluralité de capteurs de température (Rs₁ à Rs₇) qui délivrent des signaux de sortie dont les valeurs dépendent d'un état surveillé par les capteurs, et un dispositif d'interprétation relié aux capteurs qui est activé, avec déclenchement d'un signal d'alarme, lorsque les signaux de sortie atteignent une grandeur présélectionnée et qui comprend un commutateur de seuil (IC₅₁) générant le signal d'alarme et relié à la sortie (3) d'un dispositif d'interrogation (IC₃) lequel comporte plusieurs entrées (1, 2, 5, 12 à 15) reliées chacune à un capteur (Rs₁ à Rs₇) et des moyens (IC₂) qui relient les entrées (1, 2, 5, 12 à 15) périodiquement et successivement à la sortie (3), caractérisé en ce que les capteurs de température (Rs₁ à Rs₇) sont constitués par des thermistors en forme de perles qui sont encastrés dans des boîtiers (6) dans une masse de scellement (11) de telle façon que leurs pointes (3) portant les petites billes semi-conductrices (6) dépassent de la masse de scellement, que les boîtiers (6) présentent des sections terminales (8) avec des capuchons de protection (12) qui comportent au moins une ouverture destinée à maintenir un courant d'air sur la pointe (3), et que la masse de scellement (11) remplit également en partie le capuchon de protection (12).
  2. Dispositif de signalisation d'état selon la revendication 1, caractérisé en ce qu'une sortie (7) du commutateur de seuil (IC₅₁) est reliée à une bascule monostable (IC₆) destinée à la mémorisation temporaire du signal d'alarme.
  3. Dispositif de signalisation d'état selon la revendication 2, caractérisé en ce que la sortie de la bascule monostable (IC₆) est reliée à l'entrée de commande (2) d'un sectionneur de puissance (T₁) couplé avec un dispositif d'alarme et/ou de sécurité (20).
  4. Dispositif de signalisation d'état selon la revendication 3, caractérisé en ce que le dispositif d'alarme et/ou de sécurité (20) comprend un système d'extinction (22) qui peut être déclenché par le signal d'alarme.
  5. Dispositif de signalisation d'état selon l'une des revendications 3 ou 4, caractérisé en ce que le dispositif d'alarme et/ou de sécurité (20) comprend un système d'alarme (L₁) pouvant être activé par le signal d'alarme pour la durée de celui-ci et un système d'alarme (L₂) pouvant être activé en permanence par le signal d'alarme.
  6. Dispositif de signalisation d'état selon l'une des revendications 3 à 5, caractérisé en ce qu'au dispositif d'alarme et/ou de sécurité (20) est associé un dispositif de contrôle (41, L₃, L₄) pour en vérifier le fonctionnement.
  7. Dispositif de signalisation d'état selon l'une des revendications 1 à 6, caractérisé en ce qu'avec le dispositif d'interprétation est monté en parallèle un dispositif de contrôle qui en vérifie le fonctionnement correct et délivre un signal d'alarme supplémentaire en cas de fonctionnement incorrect.
  8. Dispositif de signalisation d'état selon la revendication 7, caractérisé en ce que le dispositif de contrôle comprend un commutateur de seuil supplémentaire (IC₅₂) qui délivre le signal d'alarme supplémentaire et est relié à la sortie (3) d'un dispositif d'interrogation supplémentaire (IC₄) laquelle comporte des entrées (1, 2, 4, 5, 12, 13, 15) reliées chacune à un capteur (Rs₁ à Rs₇) ainsi que des moyens (IC₂) qui relient périodiquement et successivement les entrées (1, 2, 4, 5, 12, 13, 15) à la sortie (3).
  9. Dispositif de signalisation d'état selon la revendication 8, caractérisé en ce que la sortie (1) du commutateur de seuil supplémentaire (IC₅₂) est reliée à un dispositif d'affichage (39).
  10. Dispositif de signalisation d'état selon la revendication 9, caractérisé en ce que le dispositif d'affichage (39) comprend un clavier (43) couplé avec au moins un dispositif de contrôle (44) et permettant la vérification individuelle des capteurs (Rs₁ à Rs₇) par actionnement des touches.
  11. Dispositif de signalisation d'état selon l'une des revendications 1 à 10, caractérisé en ce que les dispositifs d'interrogation (IC₃, IC₄), les commutateurs de seuil (IC₅₁, IC₅₂) et les moyens (IC₂) sont groupés en une carte de circuits imprimés embrochable normalisée (IC₈) qui comporte des bornes d'entrée pour des thermistors pouvant être sélectionnés individuellement et des organes de réglage réglables ou pouvant être présélectionnés en fonction de ceux-ci, des dispositifs d'affichage, des tensions de service ou analogues ainsi qu'au moins une sortie (2) pour la délivrance des signaux d'alarme fournis par le dispositif d'interprétation.
  12. Capteur de température avec un boîtier, comprenant un fond muni d'un connecteur et une section terminale creuse détournée de ce dernier dans laquelle est disposé un thermistor dont les fils de raccordement sont reliés aux connecteurs, et qui est remplie par ailleurs d'une masse de scellement constituée de résine époxy à couler, caractérisé en ce que la section terminale (8) est ouverte à son extrémité libre et que le thermistor (1) est constitué par un thermistor en forme de perle qui est disposé dans la section terminale (8) et encastré dans la masse de scellement (11) de telle façon que sa pointe (3) portant la bille semi-conductrice (4) dépasse de la masse de scellement (11), que la section terminale (8) est munie d'un capuchon de protection (12) qui présente au moins une ouverture destinée à maintenir un courant d'air à la pointe (3), et que la masse de scellement (11) remplit en partie également le capuchon de protection (12).
  13. Procédé de fabrication d'un capteur de température selon la revendication 12, consistant à assembler tout d'abord mécaniquement les différents éléments du capteur de température et à remplir ensuite la section terminale creuse d'une résine époxy à couler à deux constituants comprenant une masse d'étanchéité et un durcisseur, caractérisé en ce que la masse d'étanchéité et le durcisseur sont tout d'abord mélangés dans le rapport de mélange (rapport de poids) de 10:1 à 10:1,1, avec réalisation d'une masse de scellement, que ladite masse de scellement est ensuite introduite dans la section terminale (8) creuse de l'élément connecteur (6) préchauffée de préférence à environ 80°C, jusqu'à ce que seule la pointe (3) du thermistor (1) qui porte la bille de thermistor (4) dépasse encore de la masse de scellement, que le durcissement consécutif est réalisé dans un four de chauffage lequel est tout d'abord réglé pour environ 16 heures à environ 80°C, puis pour environ 3 heures à environ 120°C et ensuite pour environ 3 heures à environ 180°C, et que pour terminer, le capteur de température est refroidi à la température ambiante.
  14. Procédé selon la revendication 13, caractérisé en ce qu'un mélange de Stycast 2762 FT et de Catalyst 17 est utilisé comme masse de scellement.
EP91910757A 1990-06-19 1991-06-19 Dispositif de signalisation d'une temperature donnee, capteur de temperature approprie et methode de fabrication de celui-ci Expired - Lifetime EP0535029B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4019542 1990-06-19
DE4019542 1990-06-19
PCT/DE1991/000507 WO1991020065A2 (fr) 1990-06-19 1991-06-19 Dispositif de signalisation d'une situation

Publications (2)

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EP0535029A1 EP0535029A1 (fr) 1993-04-07
EP0535029B1 true EP0535029B1 (fr) 1994-09-14

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US (1) US5463375A (fr)
EP (1) EP0535029B1 (fr)
JP (1) JPH06500873A (fr)
AT (1) ATE111621T1 (fr)
AU (1) AU8084291A (fr)
CA (1) CA2085872A1 (fr)
DE (2) DE59102963D1 (fr)
DK (1) DK0535029T3 (fr)
ES (1) ES2064107T3 (fr)
WO (1) WO1991020065A2 (fr)

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US6083587A (en) 1997-09-22 2000-07-04 Baxter International Inc. Multilayered polymer structure for medical products
JP4121104B2 (ja) * 1999-07-16 2008-07-23 松下電器産業株式会社 二次電池
US6894254B2 (en) 2000-04-20 2005-05-17 Mks Instruments, Inc. Heater control system with combination modular and daisy chained connectivity and optimum allocation of functions between base unit and local controller modules
JP3739084B2 (ja) * 2001-09-28 2006-01-25 ホーチキ株式会社 火災熱感知器
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US9162095B2 (en) 2011-03-09 2015-10-20 Alan E. Thomas Temperature-based fire detection
US9341518B2 (en) * 2013-08-27 2016-05-17 Innovative Control Technologies, LLC Method and apparatus for remotely monitoring liquid food products
DE102015106251A1 (de) * 2015-04-23 2016-10-27 Phoenix Contact E-Mobility Gmbh Steckverbinderteil mit einer Temperaturüberwachungseinrichtung
CN109959771A (zh) * 2019-04-28 2019-07-02 南开大学 一种农业灌溉用水适宜性快速检测装置与评价方法
CN113763663B (zh) * 2021-07-05 2022-12-13 深圳市望硕科技有限公司 一种智慧园区智能安防报警器

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Publication number Publication date
DK0535029T3 (da) 1995-01-09
US5463375A (en) 1995-10-31
ATE111621T1 (de) 1994-09-15
ES2064107T3 (es) 1995-01-16
WO1991020065A2 (fr) 1991-12-26
DE4120126A1 (de) 1992-01-02
JPH06500873A (ja) 1994-01-27
CA2085872A1 (fr) 1991-12-20
AU8084291A (en) 1992-01-07
EP0535029A1 (fr) 1993-04-07
WO1991020065A3 (fr) 1992-03-05
DE59102963D1 (de) 1994-10-20

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