• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to an on-board system for detecting a temperature of an element, the system comprising a radio tag, the radio-tag being fixed on the element and comprising an antenna, the antenna comprising a charge, a reader of radio-label, the radio-tag reader being adapted to emit an interrogation signal and receive back a response signal from the radio-tag, the load comprises a thermo-resistance and the radio-tag reader is adapted to determine a gain and / or phase shift between the interrogation signal and the response signal and derive a temperature of the element.
    公开号:FR3060742A1
    申请号:FR1662594
    申请日:2016-12-16
    公开日:2018-06-22
    发明作者:Pierre Charon
    申请人:Airbus Operations SAS；
    IPC主号:
    专利说明:

    © Publication no .: 3,060,742 (to be used only for reproduction orders)
    ©) National registration number: 16 62594 ® FRENCH REPUBLIC
    NATIONAL INSTITUTE OF INDUSTRIAL PROPERTY
    COURBEVOIE © IntCI 8
    G 01 K 7/18 (2017.01), G 06 K 19/07, 7/10
    A1 PATENT APPLICATION
    ©) Date of filing: 16.12.16. (© Applicant (s): AIRBUS OPERATIONS Company by (© Priority: simplified actions - FR. @ Inventor (s): CHARON PIERRE. ©) Date of public availability of the request: 22.06.18 Bulletin 18/25. ©) List of documents cited in the report preliminary research: Refer to end of present booklet (© References to other national documents ® Holder (s): AIRBUS OPERATIONS Company by related: simplified actions. ©) Extension request (s): (© Agent (s): LE GUEN & ASSOCIES Civil society professional.
    TEMPERATURE DETECTION SYSTEM USING A RADIO LABEL INCLUDING THERMO-RESISTANCE.
    FR 3 060 742 - A1 yv / The invention relates to an on-board system for detecting a temperature of an element, the system comprising a radio label, the radio label being fixed on the element and comprising an antenna, the antenna comprising a load, a radio-tag reader, the radio-tag reader being adapted to emit an interrogation signal and receive in return a response signal from the radio-tag, the load comprises a thermo-resistance and the radio-tag reader is adapted to determine a gain and / or a phase shift between the interrogation signal and the response signal and to deduce therefrom a temperature of the element.

    i
    The present invention relates to the field of systems on board an aircraft, and more particularly that of systems for detecting overheating of an element of the aircraft (“OverHeat Detection System”).
    An aircraft comprises systems making it possible to detect any overheating of an element, such as a reactor or a nozzle, said overheating being able to be linked to an anomaly, for example a fire. It is common to use temperature sensors that include a eutectic. A eutectic is a mixture of two pure bodies that melts and solidifies at constant temperature, for example a mixture of water and salt. Such a mixture therefore passes from the solid state to the liquid state, and vice versa, at a predefined constant temperature. A sensor can be in the form of a cable, comprising a conductive core and an envelope, also conductive. Inside this cable, between the core and the envelope, a eutectic is present. This eutectic is typically an electrical insulator when it is in the solid state, and becomes an electrical conductor in the liquid state. A mixture of water and salt is commonly used, which mixture being an electrical conductor in the liquid state, the conductivity depending on the proportion of salt in the mixture. The central core is typically made of nickel, the outer shell is typically a superalloy, that is to say an alloy containing a large amount of nickel and chromium. An electrical voltage, typically a low-frequency alternating voltage, is applied between the central core and the outer shell. When the eutectic is in the solid state, no current can pass, the eutectic being an electrical insulator in this state. On the contrary, when a section of the cable is heated to a temperature such that the eutectic included in the cable passes to the liquid state, an electric current can flow between the central core and the outer envelope. It is thus possible to detect this electric current and to deduce therefrom that at least one section of the cable is subjected to a temperature higher than the melting temperature of the eutectic.
    This type of overheating detector, using a eutectic, has many disadvantages. First, the installation of such sensors in an aircraft poses many constraints due to the rigidity of the detector cables. This rigidity is inherent in the need to have a central core and an outer envelope made of an electrically conductive material which can withstand high temperatures, very often a very flexible metallic material. These cables thus frequently have constraints on the radius of curvature that they can take, particularly at the connectors allowing their connection to the overheating detection system. Such sensors must also be installed taking into account possible expansion of the elements on which they are mounted. On the other hand, the eutectic included in the sensor must be designed to withstand the environmental constraints specific to an aircraft, particularly vibrations. More generally, such sensors do not make it possible to know at which point of the detector cable the overheating has occurred. Such sensors do not make it possible to locate an overheating more precisely than on the cable, which can potentially be long.
    It is therefore necessary to propose a system making it possible to overcome these drawbacks.
    The invention relates to an on-board system for detecting an element temperature, the system comprising a radio label, the radio label being fixed on the element and comprising an antenna, the antenna comprising a load, a reader radio tag, the radio tag reader being adapted to emit an interrogation signal and receive in return a response signal from the radio tag, the load comprises a thermo-resistance and the radio tag reader is suitable for determining a gain and / or a phase difference between the interrogation signal and the response signal and deducing therefrom a temperature of the element.
    Advantageously, the system allows a measurement of the temperature of an element on which is fixed, or integrated, a radio tag whose antenna incorporates a load comprising a thermo-resistance. Reading, by a suitable radio-tag reader, the radio-label, makes it possible to deduce the temperature of the element. This system makes it possible to determine the temperature at a precise point of an element, and consequently to locate precisely a possible overheating. This system also allows a remote reading of the temperature of the element, the reading being done by radio wave. It is thus possible to access the temperature of an element that is not accessible, for example because the element is placed behind a layer of insulation. In addition, an RFID (“Radio-Frequency Identification”) type radio tag, adapted to integrate a thermo-resistance, can be produced at a low cost.
    According to a complementary embodiment of the invention, the radio-tag reader is adapted to access a database of correspondence between, on the one hand, a temperature and, on the other hand, the gain and / or the phase shift between the interrogation signal and the response signal.
    Advantageously, the system comprises a database making it possible to make the correspondence between, on the one hand, a temperature and, on the other hand, the gain and / or the phase shift between the interrogation signal and the response signal. It is therefore not necessary to calibrate each radio tag or radio tag reader individually.
    According to a complementary embodiment of the invention, the heat resistance comprises a platinum resistance.
    Advantageously, the heat resistance used is a heat resistance conventionally used for developing temperature probes, which makes it possible to reduce costs.
    The invention also relates to a radio tag for an on-board system for detecting a temperature of an element, the radio tag being able to be fixed to the element and comprising an antenna, the antenna comprising a load comprising a thermo-resistance.
    Advantageously, the radio tag emits a response signal, in response to an interrogation signal emitted by a radio tag reader, the gain and / or phase shift of which depends on the temperature of the heat resistance.
    The invention also relates to a radio tag reader for an on-board system for detecting a temperature of an element, the radio tag reader being adapted to send an interrogation signal and receive a response signal in return. from a radio tag attached to the element, determine a gain and / or a phase difference between the interrogation signal and the response signal, find in a database a correspondence between, on the one hand, a temperature and, on the other hand, the gain and / or the phase shift between the interrogation signal and the response signal and deduce a temperature of the element as a function of the gain and / or the phase shift between the interrogation signal and the response signal.
    Advantageously, the radio tag reader can deduce from the reading of a suitable radio tag comprising a temperature resistance at a temperature.
    According to a complementary embodiment of the invention, the radio tag reader is further adapted to determine an estimate of a speed of the air flow as a function of the evolution of the temperature measured over time.
    The invention also relates to a method for detecting a temperature of an element, the element comprising a radio tag, the radio label comprising a load comprising a heat resistance, the method being carried out by a radio player. - label and including the steps of:
    send an interrogation signal, receive in return a response signal from the radio tag, determine a gain and / or phase difference between the interrogation signal and the response signal, deduce a temperature as a function of the gain and / or phase shift.
    According to a complementary embodiment of the invention, the method comprises, to carry out the step of deducing a temperature as a function of the gain and / or phase shift, a step of finding in a database a correspondence between, on the one hand , a temperature and, on the other hand, the gain and / or the phase shift between the interrogation signal and the response signal.
    The invention also relates to a computer program, which can be stored on a medium and / or downloaded from a communication network, in order to be read by a processor. This computer program includes instructions for implementing all or part of the steps mentioned below, when said program is executed by the processor.
    The invention also relates to a means of storing information comprising such a computer program.
    The characteristics of the invention mentioned above, as well as others, will appear more clearly on reading the following description of an exemplary embodiment, said description being made in relation to the accompanying drawings, among which:
    - Fig. 1 schematically illustrates a radio tag for an on-board system for detecting a temperature of an element, the radio tag being fixed to the element, according to an embodiment of the invention;
    - Fig. 2 illustrates the effect of temperature on the gain of an antenna comprising a load, the load comprising a thermo-resistance, according to an embodiment of the invention;
    - Fig. 3 schematically illustrates the architecture of an antenna of a radio tag according to an embodiment of the invention;
    - Fig. 4 schematically illustrates an on-board system for detecting a temperature of an element, the system comprising a radio tag attached to the element and a radio tag reader, according to an embodiment of the invention.
    Fig · 1 schematically illustrates a radio label 100 for an on-board system for detecting an element temperature, the radio label being fixed on the element, according to an embodiment of the invention. The element is typically an element of an aircraft whose temperature is to be determined.
    In the illustration in Fig. 1, the radio tag is integrated into the element whose temperature is to be measured. The element can be a vent for a duct, which indirectly makes it possible to measure the temperature of the fluid passing through said duct. Advantageously, it is then possible to replace an element, an existing air vent for example, by another element comprising the radio tag 100. It is thus possible to set up a temperature detection system at low cost by replacing only this one element.
    The radio tag 100 for an on-board system for detecting a temperature of an element can therefore be fixed or integrated on the element. The radio tag 100 comprises a microcontroller 110. The radio tag 100 comprises an antenna, for example a dipole made up of parts 111 and 112. The antenna comprising a load 115 comprising a heat resistance. The parts 111 and 112 of the dipole constituting the antenna can be formed by depositing a layer of copper on the element. The architecture of the radio tag 100 is conventional, with the notable difference that the load 115 is a heat resistance. Load 115 is for example made up of a platinum resistor. Thus, the gain and / or phase shift of the antenna depends on the temperature of the load 115 of the antenna. The radio tag 100 is for example an RFID (“Radio-Frequency Identification” in English) or NFC (“Near Field Communication”) tag, with the difference that the radio tag 100.
    Fig. 2 illustrates the effect of temperature on the gain of an antenna comprising a load, the load comprising a heat resistance according to an embodiment of the invention.
    Curves 121 and 122 represent the gain (in decibel - dB -, on vertical tax) of an antenna comprising a load, the load comprising a heat resistance, according to a frequency (in megahertz - MHz -, on horizontal tax). Curve 121 represents the gain of the antenna when the temperature of the load, that is to say the heat resistance, is 25 ° C. Curve 122 represents the gain of the antenna when the temperature of the load is 160 ° C. Thus, at a frequency of 800 MHz, we see that the gain of the antenna is 5dB higher at a temperature of 25 ° C compared to a temperature of 160 ° C. The attenuation of the gain with the increase in temperature allows indirect access to the temperature, a correspondence table between the gain of the antenna and the temperature having to be predetermined, for example during a calibration step of the radio label 100.
    Fig · 3 schematically illustrates the architecture of an antenna of a radio tag 100 according to an embodiment of the invention. The antenna here consists of parts 111 and 112 of a dipole, these parts 111 and 112 being connected to the load 115. The load 115 comprises a heat resistance, for example a platinum resistance. The load 115 may consist of a temperature probe, for example a so-called "PtlOO" probe comprising a plain resistance.
    The antenna illustrated in Fig. 3 thus makes it possible to obtain an antenna whose gain and / or phase shift depends on the temperature of the load 115.
    Fig. 4 schematically illustrates an on-board system for detecting a temperature of an element, the system comprising a radio tag 100 fixed on the element and a radio tag reader 400, according to an embodiment of the invention.
    The radio tag reader 400, for example an RFID tag reader, is suitable for transmitting an interrogation signal and receiving in return a response signal from a radio tag, for example the radio tag 100.
    The radio tag reader 400 is further adapted to determine a gain and / or phase shift between an interrogation signal sent by the radio tag reader 400 and a response signal, sent back by the radio tag 100 , and deduce therefrom a temperature of the element on which the radio tag 100 is fixed.
    The radio-tag reader 400 is adapted to access a database of correspondence between, on the one hand, a temperature and, on the other hand, the gain and / or the phase shift between the interrogation signal transmitted and the response signal received in return. This database can be recorded in the radio-tag reader, in an internal memory, or the radio-tag reader can access a remote base to find information on the correspondence between a temperature and a gain and / or phase shift. The correspondence information can be associated with an identifier of the radio tag 100 interrogated by the radio tag reader 400. The identifier can be found during the step of interrogation or reading of the radio tag 100 by the radio-tag reader 400. The identifier can make it possible to find the type of thermo-resistance used in charging the radio-tag, and to deduce therefrom a correspondence to be made between, on the one hand, a gain and / or phase shift and, on the other hand, a temperature. The heat resistance can be of the “PtlOOO”, “PtlOO” or “Pt25” type, for example.
    Thus, to determine the temperature of the element on which the radio tag 100 is fixed, the radio tag reader 400 performs the following steps:
    - send an interrogation signal,
    - receive in return a response signal from the radio tag 100 attached to the element,
    - determine a gain and / or a phase difference between the interrogation signal and the response signal received in return, and,
    - deduct a temperature of the element as a function of the gain and / or the phase shift between the interrogation signal and the response signal.
    In order to deduce the temperature of the element, the radio-tag reader 400 can find in a database a correspondence between, on the one hand, a temperature and, on the other hand, the gain and / or the phase shift between the interrogation signal and the response signal.
    By means of a prior calibration operation, a determination of the slope of a temperature evolution curve measured between two moments "tl" and "t2" makes it possible to deduce a measurement of the flow of hot air, this is i.e. the speed of the hot air flow. In other words, the greater the flow of hot air, the more the radio label
    100 quickly reaches the final temperature of the hot air flow, that is, the more the temperature measured by the radio tag reader 400 quickly reaches the temperature value of the hot air flow.
    Let "D" be the slope of the evolution curve, we have:
    _ (Temp2-Templ) ~ (t2 - tl) ’
    With "Temp2" the final temperature, at time "t2", and "Templ", the initial temperature, at time "tl". The final temperature "Temp2" corresponds to the temperature of the hot air flow. The initial temperature “Templ” is typically the ambient temperature.
    It is then possible, by means of one or more preliminary calibration steps, to obtain an evaluation or estimation of an air flow from the value of "D" measured. In other words, an estimate of the speed and temperature of an air flow can be obtained from the determination of "D". The calibration operation of a radio tag 100 and of a radio tag reader 400 may include measurements of the evolution of the measured temperature of a radio tag 100 subjected to an air flow of a predetermined speed and a predetermined temperature.
    Thus, the radio-tag reader 400 can be adapted to determine an estimate of a speed of the air flow as a function of the evolution of the temperature measured over time, for example between the moments "tl" and " t2 ".
    The radio-tag reader 400 comprises, possibly connected by a communication bus: a processor or CPU ("Central Processing Unit" in English); a RAM type memory (“Random Access Memory” in English) and / or ROM (“Read Only Memory” in English), a storage module of internal storage type, a radio module and possibly one or more modules of different natures. The radio module is adapted to allow the radio tag reader to send a radio interrogation signal and to receive in return, emitted by a radio tag, a radio response signal.
    The RFID reader 400 can also include a communication module, for example of the WiFi module type (“Wireless Fidelity” in English) allowing the RFID reader 400 to connect to a remote server, possibly to access a database hosted on this remote server. The database may include correspondence data between, on the one hand, a temperature and, on the other hand, the gain and / or the phase shift between the interrogation signal emitted by the radio-tag reader 400 and the response signal returned by the radio tag 100. Said database can also be recorded on the storage module of the radio tag reader 400.
    The processor of the radio tag reader 400 is capable of executing instructions loaded in the memory, for example from the storage module or from the communication module. When the RFID reader 400 is powered up, the processor is able to read and execute instructions memory. These instructions form a computer program causing the implementation, by the processor, of all or part of the methods and steps of the method for detecting a temperature of an element implemented by the radio-tag reader 400. Thus, all or part of the methods and steps described in this document can be implemented in software form by execution of a set of instructions by a programmable machine, such as a DSP ("Digital SignalProcessor" in English) or a microcontroller. All or part of the processes and steps described in this document can also be implemented in hardware form by a dedicated machine or component, such as an FPGA (“Field-Programmable Gâte Array” in English) or an ASIC (“Application-Specific” Integrated Circuit ”.
    ίο
    权利要求:
    Claims (10)
    [1" id="c-fr-0001]
    1) On-board system for detecting an element temperature, the system comprising:
    a radio tag (100), the radio tag being fixed on the element and comprising an antenna (111, 112), the antenna comprising a load (115),
    - a radio tag reader (400), the radio tag reader being adapted to send an interrogation signal and receive in return a response signal from the radio tag, the system being characterized in that:
    - the load comprises a thermo-resistance,
    - the RFID reader is suitable for determining a gain and / or a phase difference between the interrogation signal and the response signal and deducing therefrom a temperature of the element.
    [2" id="c-fr-0002]
    2) System according to the preceding claim, the radio-tag reader being adapted to access a database of correspondence between, on the one hand, a temperature and, on the other hand, the gain and / or the phase shift between the interrogation signal and response signal.
    [3" id="c-fr-0003]
    3) System according to one of the preceding claims, the heat resistance comprising a platinum resistance.
    [4" id="c-fr-0004]
    4) A radio label (100) for an on-board system for detecting a temperature of an element, the radio label being able to be fixed to the element and comprising an antenna (111, 112), the antenna comprising a load (115) comprising a heat resistance.
    [5" id="c-fr-0005]
    5) A radio tag reader (400) for an on-board system for detecting an element temperature, the radio tag reader being suitable for:
    - send a query signal and receive in return a response signal from a radio tag (100) attached to the element,
    - determine a gain and / or a phase difference between the interrogation signal and the response signal,
    - find in a database a correspondence between, on the one hand, a temperature and, on the other hand, the gain and / or the phase shift between the interrogation signal and the response signal, and,
    - deduct a temperature of the element as a function of the gain and / or the phase shift between the interrogation signal and the response signal.
    [6" id="c-fr-0006]
    6) Radio-tag reader according to the preceding claim, the radio-tag reader being further adapted to determine an estimate of a speed of the air flow as a function of the evolution of the temperature measured over time.
    [7" id="c-fr-0007]
    7) A method of detecting a temperature of an element, the element comprising a radio tag (100), the radio label comprising a load (115) comprising a heat resistance, the method being carried out by a reader radio tag (400) and comprising the steps of:
    - send an interrogation signal,
    - receive in return a response signal from the radio tag,
    - determine a gain and / or a phase difference between the interrogation signal and the response signal,
    - deduct a temperature as a function of the gain and / or phase shift.
    [8" id="c-fr-0008]
    8) Method according to the preceding claim, the method comprising, to carry out the step of deducing a temperature as a function of the gain and / or phase shift, a step of:
    - find in a database a correspondence between, on the one hand, a temperature and, on the other hand, the gain and / or the phase difference between the interrogation signal and the response signal.
    [9" id="c-fr-0009]
    9) Computer program, characterized in that it comprises instructions for implementing, by a processor, the method of detecting a temperature of an element according to any one of claims 7 or 8, when the computer program is executed by the processor.
    [10" id="c-fr-0010]
    10) Information storage means comprising a computer program 5 according to the preceding claim.
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    引用文献:
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    EP2182581A1|2007-12-10|2010-05-05|Omron Corporation|Rfid tag, and system and method for detecting change of rfid tag environment|
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    DE102009005100A1|2009-01-19|2010-07-22|Schreiner Group Gmbh & Co. Kg|Transponder device for storing data, has antenna arrangement for decoupling signal from device, where level of signal is based on condition of sensor element, and condition is varied based on physical or chemical reaction on material|
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    法律状态:
    2017-12-21| PLFP| Fee payment|Year of fee payment: 2 |
    2018-06-22| PLSC| Publication of the preliminary search report|Effective date: 20180622 |
    2019-12-19| PLFP| Fee payment|Year of fee payment: 4 |
    2020-12-23| PLFP| Fee payment|Year of fee payment: 5 |
    2021-12-24| PLFP| Fee payment|Year of fee payment: 6 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1662594|2016-12-16|
    FR1662594A|FR3060742B1|2016-12-16|2016-12-16|TEMPERATURE DETECTION SYSTEM USING A RADIO-LABEL INCLUDING A THERMO-RESISTOR|FR1662594A| FR3060742B1|2016-12-16|2016-12-16|TEMPERATURE DETECTION SYSTEM USING A RADIO-LABEL INCLUDING A THERMO-RESISTOR|
    US15/825,713| US10095971B2|2016-12-16|2017-11-29|Temperature detection system using a radio-tag comprising a thermistor|
    CN201711276602.XA| CN108204864A|2016-12-16|2017-12-06|System for detecting temperature and method, label reader, program and its storage device|
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