EP2561325A2 - Système de contrôle de la température - Google Patents

Système de contrôle de la température

Info

Publication number
EP2561325A2
EP2561325A2 EP11719467A EP11719467A EP2561325A2 EP 2561325 A2 EP2561325 A2 EP 2561325A2 EP 11719467 A EP11719467 A EP 11719467A EP 11719467 A EP11719467 A EP 11719467A EP 2561325 A2 EP2561325 A2 EP 2561325A2
Authority
EP
European Patent Office
Prior art keywords
temperature
component
measured value
monitoring system
monitoring
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Withdrawn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
EP11719467A
Other languages
German (de)
English (en)
Inventor
Klaus Wittig
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.)
Wuerth Elektronik ICS GmbH and Co KG
Original Assignee
Wuerth Elektronik ICS GmbH and Co KG
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 Wuerth Elektronik ICS GmbH and Co KG filed Critical Wuerth Elektronik ICS GmbH and Co KG
Publication of EP2561325A2 publication Critical patent/EP2561325A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K3/00—Thermometers giving results other than momentary value of temperature
    • G01K3/005—Circuits arrangements for indicating a predetermined temperature
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
    • G01K7/22—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor
    • G01K7/223—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor characterised by the shape of the resistive element
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K3/00—Thermometers giving results other than momentary value of temperature
    • G01K3/08—Thermometers giving results other than momentary value of temperature giving differences of values; giving differentiated values
    • G01K3/14—Thermometers giving results other than momentary value of temperature giving differences of values; giving differentiated values in respect of space
    • G01K2003/145—Hotspot localization

Definitions

  • the invention relates to a system for monitoring the temperature of at least one component, wherein the monitoring system comprises at least one
  • Monitoring circuit in which at least one temperature sensor is arranged, which is thermally coupled or coupled to the component such that the temperature sensor can assume a current temperature or at least almost the current temperature of the component.
  • thermocouple temperature sensor arranged in the monitoring circuit
  • the at least one temperature sensor is an electrical resistance element, in particular a PTC resistance element or a PPTC resistance element whose electrical resistance in a temperature range in which a predetermined threshold temperature to be monitored is the component is increasing non-linearly with increasing temperature, so that monitoring of the current temperature of the component can be carried out on exceeding the threshold temperature based on an electrical measurement of a dependent of the current electrical resistance of the resistive element measured value.
  • PTC resistors PTC for positive temperature coefficient
  • PPTC resistors PPTC for polymer positive temperature coefficient
  • PPTC resistors are known per se from the prior art and are used as current limiters in load circuits.
  • PPTC resistors PPTC for polymer positive temperature coefficient
  • PPTC resistors are also referred to as "smart fuses”.
  • the provided for monitoring the component resistance element is selected such, for example, from the commercially available PPTC resistors that the threshold temperature is within the said temperature range of the resistive element in which the electrical resistance increases strongly nonlinearly with increasing temperature. Therefore, when the threshold temperature is reached or exceeded, the resistance of the resistance element essentially changes abruptly, so that, based on a measured value dependent on the current electrical resistance of the resistance element, monitoring of the current temperature of the component is achieved
  • Resistor elements arranged electrically in series in the monitoring circuit and each resistive element is thermally coupled or coupled at least to a component to be monitored. As a result, it is possible to monitor the temperatures and / or several components occurring at several points on a component in a particularly simple manner.
  • a measuring device is provided for measuring the measured value, which is electrically connected or connectable to the at least one electrical resistance element.
  • the measuring device is integrated in the monitoring circuit or can via one or more switches or the like in the
  • Monitoring circuit are switched at least temporarily.
  • at least one further, second monitoring circuit is provided, which is electrically from the first
  • Monitoring circuit is disconnected and in which at least one other
  • Resistor element is arranged.
  • Monitoring circuits are used, for example by the
  • Measuring device is connected via one or more switches in each one of the circuits.
  • the use of separate monitoring circuits, each with a resistive element is particularly advantageous in that in this way a localization of the component is possible, the temperature of a
  • Threshold temperature exceeds.
  • the electrical resistance of the resistance element of the second monitoring circuit can increase non-linearly with increasing temperature in a higher second temperature range in which a predetermined second threshold temperature of the component to be monitored is located.
  • An evaluation device can also be provided, which is designed to select an operating state from at least two predetermined operating states on the basis of the measured value and optionally of the further, second measured value.
  • the evaluation device may be cable-based or wirelessly connected or connectable to the measuring device in order to transmit the measured value or optionally the measured values to the evaluation device.
  • the evaluation and measuring equipment may in particular also be accommodated in the same component of the monitoring system.
  • the evaluation device can be embodied as a separate, in particular portable device, and the measuring device can be designed as a component of the monitoring circuit or circuits which can be connected in particular.
  • the evaluation device is adapted to a
  • Normal temperature mode to select when the measured value meets a specified for normal temperature operating condition, a
  • the evaluation device has a
  • the evaluation device has a data memory or is at least functionally coupled thereto.
  • data which in particular the measured value and / or the second measured value and / or the
  • the evaluation device can also be designed to be made of the
  • the evaluation device is designed to use the frequency distribution to determine the number of within a certain range
  • An advantage of this development is therefore that an advanced aging of the component can be detected, which in turn promotes rapid replacement of the component. As a result, the risk of fire from a heavily aged component can ultimately be reduced.
  • the at least one component may be any mechanical component, for example, which may become warm, in particular when used as intended.
  • the component may be a component of an engine or a component installed in a motor vehicle.
  • the component may be an electrical or electronic component which is arranged in a load circuit, which is of the
  • the invention also relates to a PPTC electrical resistance element, in particular for use in a monitoring system according to the invention, which is designed in the form of a cable or integrated in an electrical cable.
  • the resistance element is suitable for monitoring the temperature of one or more electrical cables which, for example, are bundled in a cable harness. It is preferably the kabeiförmige or integrated into a cable
  • Resistance element arranged as a central, central "cable" in the wiring harness and the actual cables are distributed around the resistance element distributed in the circumferential direction.
  • An electrical cable, in which the PPTC resistance element is integrated, preferably has an electrically conductive wire, for example, a copper wire, in at least an area is interrupted.
  • the PPTC resistance element is arranged in this area so that it can bridge the interruption electrically.
  • FIG. 1 shows an embodiment of a monitoring system according to the invention
  • FIG. 2 shows a resistance characteristic of a PPTC resistance element in logarithmic representation as a function of the temperature.
  • Fig. 4 shows another embodiment of an inventive
  • Fig. 6 shows an example for each determined over a period of one year
  • FIG. 7 shows an application example of a monitoring system according to the invention for monitoring components of a load circuit
  • Fig. 8 is another example of an application of the invention
  • Fig. 9 shows an embodiment of an electric cable according to the invention, in which a PPTC resistance element is integrated.
  • the monitoring system 1 shown in FIG. 1 is provided for monitoring the temperature of a component 3 and has a monitoring circuit 5, in which an electrical resistance element 7 is contained. To the monitoring circuit 5, a measuring device 9 is also connected, through which the Monitoring circuit 5 is closed. However, the measuring device 9 can only be temporarily integrated into the monitoring circuit 5, in particular if the monitoring system 1 is used as intended, and otherwise the monitoring circuit 5 remain open.
  • the resistance element 7 is thermally coupled to the component 3, that is to say it is thermally connected to the component 3, so that the resistance element 7 essentially assumes the temperature of the component 3.
  • the resistance element 7 essentially assumes the temperature of the component 3.
  • Resistive element 7 is thermally coupled to a position of the component 3, which is assumed or known to be particularly strongly heated, in particular in the case of a malfunction of the component 3, so that an effective monitoring of the temperature of the component 3 can take place on the basis of the resistance elements 7.
  • a location is generally referred to as a hot spot or as a "hot spot”.
  • the resistance element 7 is embodied as a PPTC resistance element, which is also referred to as "smart fuses.”
  • the electrical resistance value of the "smart fuse" along the ordinate increases within a relatively narrow temperature range ⁇ , 5, for example, may be non-linear with the temperature plotted along the abscissa from a lower resistance value R1 to an upper resistance value R2.
  • the lower resistance value R1 is typically only a few ohms.
  • the upper resistance value R1 is typically only a few ohms.
  • Resistance value R2 is typically several orders of magnitude higher and may be a few mega- or even a few gig-ohms.
  • a PPTC resistance element is formed of a polymer matrix filled with elemental carbon. At low temperatures, which are below the temperature range ⁇ , the carbon forms in the
  • Polymer matrix conductive areas whereby the resistance element forms quasi an electrical conductor with low electrical resistance.
  • the polymer expands the matrix and reversibly changes from a crystalline state to an amorphous state.
  • the carbon particles are separated from each other, whereby the conductive areas are interrupted and the resistance element at higher Temperatures thus quasi an insulator with a very high electrical
  • Resistance element 7 selected such, for example. From the commercially available PPTC resistors that the temperature T1 is within, especially in the middle, the temperature range .DELTA. ⁇ , as shown in FIG. 2 can be seen.
  • the measuring device 9 comprises a resistance measuring device 11, the
  • the resistance measuring device 11 may have a constant voltage source 13 through which a predetermined voltage to the monitoring circuit 5 can be applied.
  • the resistance measuring device 11 includes an ammeter 15 with which the current flowing through the monitoring circuit 5 current can be determined.
  • Resistance element 7 has only a low resistance. However, if the actual temperature of the resistive element 7 exceeds the temperature T1, then the resistance of the resistive element 7 changes quasi to R2 due to the narrow temperature range ⁇ , so that only a small or no current can be measured, since the resistive element 7 is more or less forms an insulator.
  • the monitoring system 1 based on a simple measurement of a dependent of the resistance of the resistive element 7 measured value, which is according to the preceding example, the amount of current flowing through the monitoring circuit 5 current monitoring of
  • Temperature of the component 3 take place be done that reaching or exceeding the temperature T1 can be determined.
  • non-linear PTC resistors for which an exemplary resistance-temperature characteristic is shown schematically in FIG. 3, are suitable for use in the monitoring circuit. These show within a
  • Temperature range ⁇ which is wider than in PPTC resistors and, for example, may have a width of 10 to 40 K, one of a lower resistance value R3 to an upper resistance value R4 non-linearly increasing with increasing temperature resistance characteristic.
  • the upper resistance value is thereby
  • the resistance element 7 designed in the form of a PTC resistor is in turn selected such that the threshold temperature T1 is within the temperature range ⁇ , in particular substantially in the middle of the temperature range ⁇ , as indicated in FIG.
  • the resistance element 7 is a PPTC resistor, based on a measurement of the current flowing through the monitoring circuit 5 because of the non-linearly increasing course of the
  • monitoring component 3 is achieved, since the measured value depends on the electrical resistance of the PTC resistor, the according to FIG. 3 in the environment of
  • the measuring device 9 has a display 17, which is controlled such that the display indicates a falling below and exceeding the threshold temperature T1.
  • the display may be an LED display that lights in a first color, such as green, when the threshold temperature T1 is undershot and that in a second color, such as red, is lit when the threshold temperature reaches T1 becomes.
  • the measuring device 9 may comprise a transmitting / receiving device 19, by means of which the measured value measured, that is, according to the present example, the measured Amperage, to a transmitting / receiving device 21 of an evaluation device 23 can be transmitted wirelessly.
  • the evaluation device 23 receives the measured value measured and assigns the measured value to one of, for example, two predetermined operating states.
  • Operating states can be stored on a memory device 25, for example, together with an assignment rule.
  • the resistance element 7 is designed as a PPTC resistor, be determined by the ZuOrdungsvorschrift that if the measured value measured (current) exceeds a certain amount, for example. 10 mA, the measured value referred to as normal operating condition
  • Operating state is assigned, and that is associated with a measured value below 10 mA, a so-called over-temperature operating state.
  • the evaluation device 23 can determine on the basis of the measured value whether the threshold temperature T1 has been reached and thus the component has no longer been operated in normal operation.
  • the evaluation device 23 can therefore select the corresponding operating state on the basis of the measured value measured and display it, for example for the user, on a display device 27 of FIG.
  • the evaluation device 23 is also designed to store the measured value and the determined operating state together with a time stamp in order, for example, to perform a later detailed evaluation, which will be described below by way of example.
  • the monitoring system 1 makes it possible, with a skillful choice of the resistance element 7 used, to monitor the temperature of the component 3 by means of a measured value associated with the electrical resistance of the resistance element 7, in particular to reach or exceed the threshold temperature T1.
  • the monitoring system 41 shown in FIG. 4 comprises a first one
  • Resistance element 43 and a second resistance element 45, both in one Monitoring circuit 47 are arranged in series with a measuring device 49.
  • the measuring device 49 is constructed in accordance with the measuring device 9, so that reference is made to the above explanations of the measuring device 9 with regard to details of the measuring device 49.
  • the first resistance element 43 is thermally coupled to a first component 51 and the second resistance element 45 is thermally coupled to a second component 53.
  • the two resistance elements 43, 45 are in turn in particular PPTC resistors.
  • the first resistance element 43 is selected such that a threshold temperature to be monitored for the component 51 lies within, essentially in the middle, the temperature range ⁇ in which the resistance characteristic increases abruptly (cf., FIG. 2).
  • the second resistive element 45 is designed such that a possibly different threshold temperature to be monitored for the component 53 is again within the characteristic characteristic of the second resistive element
  • the measuring device 49 consequently determines a measured value, for example, again the current magnitude which adjusts itself at a constant voltage in the monitoring circuit 47, which depends on the total resistance of the two resistance elements 43, 45.
  • the total resistance of the monitoring circuit 47 increases sharply when at least one of the two resistance elements 43, 45 due to heating of the corresponding component 51, 53 exceeds the respective threshold temperature and thus its resistance abruptly, in particular by several orders of magnitude increases.
  • the measuring device 49 therefore only measures little or no current when one of the two resistance elements 43, 45 exceeds the respective threshold temperature. Accordingly, by measuring a measured value dependent on the total resistance of the two resistance elements 43, 45, it can be ascertained whether at least one component 51, 53 has to be monitored for the respective component 51, 53 Threshold temperature has reached or exceeded. The further processing of the measured value can take place in a corresponding manner as in the embodiment of FIG.
  • the monitoring system 41 described with reference to FIG. 4 is not limited to two series-connected resistance elements 43, 45, but in principle any number of resistance elements can be connected in series. In addition, two or more resistive elements on the same component,
  • the monitoring system 71 described with reference to FIG. 5 comprises a first resistance element 73 and a second resistance element 75.
  • Resistance element 73 is in a first monitoring circuit 77 and the second resistance element 75 is arranged in a second monitoring circuit 79.
  • the monitoring system 71 comprises a measuring device 81 and a switch 83, by means of which either the first or second
  • Monitoring circuit 77, 79 can be closed, so that the
  • Measuring device 81 can be selectively switched into the first or second monitoring circuit 77, 79 to determine a first measured value, which depends on the electrical resistance of the first resistive element 73, or to determine a second measured value, the electrical resistance of the second
  • Resistive element 75 depends.
  • the first or second measured value can again be the magnitude of the current which flows through the first or second monitoring circuit 77, 79 at a constant voltage.
  • the two resistance elements 73, 75 are fastened to a component 85 and thermally coupled thereto, so that the two
  • Resistive elements 73, 75 have substantially the same instantaneous temperature.
  • the two resistive elements 73, 75 are designed as PPTC resistors.
  • the temperature range ⁇ of the first resistive elements 73, 75 are designed as PPTC resistors.
  • Resistance element 73 in which, as described above in particular with reference to FIG. 2, whose resistance increases sharply, deeper, for example. In the field of 80 ° C, than the corresponding temperature range ⁇ of the second
  • Resistance element 75 which is, for example, at about 120 ° C.
  • the temperature of the component 85 exceeds a first threshold temperature of 80 ° C., whereas it can be determined on the basis of the second measured value measured with respect to the second monitoring circuit 79 the temperature of the component 85 exceeds a second threshold temperature of about 120 ° C.
  • the two measured values are transmitted by the measuring device 81, as described above, to an evaluation unit 87 of the monitoring system 71.
  • a plurality of operating states of the component 85 or the apparatus to which the component 85 belongs are specified on a memory 89 of the evaluation unit 87, and the evaluation unit 87 is designed to determine the current operating state on the basis of the first and second measured values.
  • the first measured value as well as the second measured value can each indicate a measured current intensity. If the temperature of the component 85 is below the first threshold temperature of 80 ° C., a current flow is possible in the first monitoring circuit 77, since the first resistance element 73 acts as a conductor and not as an insulator, so that the first measured value corresponds to a current value deviating significantly from zero For example, is above a predetermined limit of 10 mA.
  • the first one acts
  • Resistor element 73 as an insulator.
  • the current that can be measured as the first measured value is close to zero amperes, in particular below the limit value.
  • the second resistance element 79 continues to act as a conductor and the current measured as the second measured value is, for example, above the limit value.
  • the second resistance element 79 also acts as an insulator, so that too the current measured as the second measured value is in the vicinity of zero amperes and in particular below the limit value.
  • the evaluation unit 87 selects a predetermined normal temperature operating state when the first measured value is above the limit value
  • the normal temperature operating state indicates an operating state of the component 85 or the apparatus in which the occurring
  • Wear of the component 85 may be.
  • the evaluation device 91 can in turn have a display device 91, by means of which the determined operating state can be displayed.
  • the indicator 91 may include an LED display, and display a first color, such as green, when the normal operating temperature condition has been detected, indicating a second color, such as yellow, when the normal operating temperature condition has been detected.
  • Intermediate temperature operating condition has been determined and a third color, for example red, indicate when the overtemperature operating condition has been determined.
  • the evaluation device 91 can also store the first measured value, the second measured value, the determined operating state and a time stamp, which specifies the time of measurement of the two measured values, in the memory 91 in order to generate a frequency distribution for the number of operating states determined within a certain period of time , 6 shows an example of such frequency distributions 101, 103 and 105 prepared for the years 2008, 2009 and 2010, each of which is shown as a histogram and from which it can be easily deduced how often in each individual year the normal temperature (" green "), the intermediate temperature (“ yellow ”) and the overtemperature operating state (“ red ”) has occurred.
  • Overtemperatur istzupiece found so that estimate the degree of aging from the obtained frequency distributions 101, 103, 105 and in particular can be monitored.
  • Evaluation device 87 the number of overtemperature operating conditions that occurred within a certain period, eg. During the last year with a predetermined maximum value and, if this is exceeded, for example, by means of the display device 91 from a warning signal.
  • Fig. 7 shows schematically an electronic or electrical assembly 111 with a printed circuit board 113, on which a load circuit 115, z. B. for high current applications, and a monitoring circuit 117 of a monitoring system according to the invention is arranged.
  • the load circuit 115 includes a plurality of printed conductors shown in dashed lines, via which a plurality of arranged in the load circuit 115 components 119 which form Joule heat sources in the load circuit and in particular fuses, relays or power elements can be electrically connected to each other.
  • the monitoring circuit 117 a plurality of, in the example shown in series resistor elements 121 and a measuring device 123 are arranged, which in turn for particular wireless communication with an evaluation device (not shown) is formed.
  • a component 119 is in thermal contact with a resistance element 121.
  • the resistance elements 121 may each be arranged between the components 119 and the printed circuit board 113.
  • the components 119 may be pressed onto the printed circuit board 113, so that a particularly good
  • the monitoring of the components 119 on the basis of the resistance elements 121 takes place in accordance with the embodiment described with reference to FIG. 4.
  • FIG. 8 schematically shows a sectional view of a cable harness 141 with a bundle of individual cables 143.
  • a resistance element 145 is arranged inside the cable harness 141, which is in thermal contact with at least one cable 143.
  • the resistance element 145 likewise has a cable shape, and is preferably in contact with it over the entire length of the cable 143. More preferably, the resistive element 145 is in thermal contact with several or all of the cables 143 along their entire length.
  • the resistance element 145 runs as a central core in the cable harness 141 and the actual cables 143 are arranged around the resistance element 145 around.
  • the resistance element 145 is again realized as kabeiförmiger PPTC resistor. Therefore, the resistive element 145 comprises a substantially kabeiförmige non-conductive crystalline organic polymer matrix, in which
  • Carbon particles are arranged so that the above-described
  • the electrical cable 153 according to the invention shown in longitudinal section in FIG. 9 comprises an electrically conductive wire, which consists of a first electrical conductor 149a and a second electrical conductor 149b and a PPTC resistance element 151 arranged between the two conductors.
  • the latter electrically connects the two electrical conductors 149a, 149b with one another or isolates them from one another, as it were, electrically.
  • the electrically conductive wire is also surrounded by a sheath 147, for example. Plastic.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

Abstract

L'invention concerne un système pour contrôler la température d'au moins un élément, le système de contrôle présentant au moins un circuit de courant de contrôle dans lequel est disposé au moins un capteur de température qui est ou peut être thermiquement couplé à l'élément de telle manière que le capteur de température puisse détecter une température effective ou au moins pratiquement la température effective de l'élément, ce capteur de température étant un élément de résistance électrique, en particulier un élément de résistance PTC ou un élément de résistance PPTC, dont la résistance électrique augmente de manière non linéaire à mesure que la température augmente dans une plage de température dans laquelle se situe une température seuil prédéfinie à contrôler de l'élément de sorte qu'un contrôle de la température effective de l'élément pour vérifier si elle dépasse la température seuil peut avoir lieu sur la base d'une mesure électrique d'une valeur dépendant de la résistance électrique effective de l'élément de résistance.
EP11719467A 2010-04-23 2011-04-26 Système de contrôle de la température Withdrawn EP2561325A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201010018037 DE102010018037B4 (de) 2010-04-23 2010-04-23 Temperaturüberwachungssystem
PCT/EP2011/002091 WO2011131374A2 (fr) 2010-04-23 2011-04-26 Système de contrôle de la température

Publications (1)

Publication Number Publication Date
EP2561325A2 true EP2561325A2 (fr) 2013-02-27

Family

ID=44503425

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11719467A Withdrawn EP2561325A2 (fr) 2010-04-23 2011-04-26 Système de contrôle de la température

Country Status (3)

Country Link
EP (1) EP2561325A2 (fr)
DE (1) DE102010018037B4 (fr)
WO (1) WO2011131374A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022144586A1 (fr) * 2020-12-31 2022-07-07 Gentherm Medical Llc Module électrique à surveillance de température multizone
DE102023001336A1 (de) 2022-04-19 2023-10-19 Sew-Eurodrive Gmbh & Co Kg Verfahren zum Betrieb einer Schaltungseinheit und Schaltungseinheit

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Publication number Priority date Publication date Assignee Title
US4025847A (en) * 1975-08-27 1977-05-24 The Sippican Corporation Measurement system including bridge circuit
US4707686A (en) * 1986-04-03 1987-11-17 General Electric Company Over temperature sensing system for power cables
DE19540625B4 (de) * 1995-10-31 2004-11-18 Kriwan Industrie-Elektronik Gmbh Schutzschaltung und Einrichtung zur Überwachung von Geräte- und/oder Maschinentemperaturen
EP1070944B1 (fr) * 1998-04-07 2009-06-17 Tyco Electronics Raychem K.K. Accumulateur, detecteur de temperature d'accumulateur et procede de production d'un detecteur de temperature
CN1879274B (zh) * 2003-11-07 2010-12-22 泰科电子雷伊化学株式会社 防过热器件以及具备该器件的电气装置
TWM308484U (en) * 2006-06-16 2007-03-21 Inpaq Technology Co Ltd Temperature control protection device
EP2255168A1 (fr) * 2008-03-20 2010-12-01 Siemens Aktiengesellschaft Mesure de la température à résolution spatiale à l'intérieur d'un domaine de détection spatial

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Title
See references of WO2011131374A2 *

Also Published As

Publication number Publication date
WO2011131374A2 (fr) 2011-10-27
DE102010018037A1 (de) 2011-10-27
DE102010018037B4 (de) 2012-08-30
WO2011131374A3 (fr) 2012-01-19

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