SYSTEM DEDICATED TO MONITORING THE PHYSICAL AND/OR ANALOGUE PARAMETERS OF THE PARTS OF AN ENGINE

• US 20150241305A1
• Filed: 10/09/2013
• Published: 08/27/2015
• Est. Priority Date: 10/10/2012
• Status: Active Grant

• Current Assignee: Controle Mesure Regulation
• Original Assignee: Controle Mesure Regulation
• Inventors: Fouache, Pascal
• Granted Patent: US 9,766,161 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G01K 11/265 using surface acoustic wave [SAW]
• CPC Class Codes: G01K 2205/00 Application of thermometers in motors, e.g. of a vehicle
• CPC Class Codes: G01M 15/05 by combined monitoring of two or more different engine parameters
• CPC Class Codes: G01N 29/2481 Wireless probes, e.g. with transponders or radio links
• CPC Class Codes: H04Q 9/00 Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom

Abstract

The invention concerns a system for monitoring physical and/or analogue parameters relative to the parts of an engine, said system comprising at least one electronic control unit (30_a) configured to call up data, via at least one antenna (20a), from a surface acoustic wave sensor located on one of said parts, characterised by the fact that:—the engine (M) is compartmentalized, each compartment (Ma, . . . , Mf) comprising a plurality of mobile or fixed parts of which the physical and/or analogue parameters need to be monitored,—each of these parts to be monitored is provided with a surface acoustic wave sensor (101a, 102a, 103a, . . . , 101f, 102f, 103f), each of said sensors having a distinct resonance frequency specific to it,—an antenna (20a, . . . , 20f) is installed inside each of the compartments (Ma, . . . , Mf), each of said antenna being connected, alone or in pairs, to an electronic control unit (30a, . . . , 30f, 30ab, . . . , 30ef),—each antenna (20a, . . . , 20f) is controlled by the electronic control unit (30a, . . . , 30f, 30ab, . . . , 30ef) to which it is connected, to simultaneously emit a plurality of distinct frequencies close to the resonance frequencies of the sensors (101a, 102a, 103a, . . . , 101f, 102f, 103f) which are located in the engine compartment (Ma, . . . , Mf) of said antenna, so as to simultaneously communicate with all of these sensors (101a, 102a, 103a, . . . , 101f, 102f, 103f).

Claims

1. System for monitoring the physical and/or analog parameters concerning parts of an engine, said system comprising at least one electronic control unit configured to call up, by the intermediary of at least one antenna, a surface acoustic wave sensor located on one of said parts, wherein:

the engine is compartmentalized, each compartment comprising a plurality of mobile or fixed parts of which the physical and/or analog parameters need to be monitored,

each of these parts to be monitored is provided with a surface acoustic wave sensor, with these sensors each having a distinct resonance frequency specific to them,

an antenna is installed inside each of the compartments, with each of these antennas being connected, alone or in pairs, to an 20 electronic control unit,

each antenna is controlled by the electronic control unit to which it is connected, to simultaneously emit a plurality of distinct frequencies close to the resonance 25 frequencies of the sensors which are located in the engine compartment of said antenna, so as to simultaneously communicate with all of these sensors.

2. System according to claim 1, wherein the antenna which is installed in a compartment, emits frequencies in a predefined frequency band which is different from the frequency band in which emits the antenna arranged in another compartment.

3. System according to claim 1, wherein the surface acoustic wave sensors arranged in the same compartment, emit in return frequencies in a band of frequencies different from those emitted in return by the surface acoustic wave sensors arranged in another neighboring compartment.

4. System according to claim 1, wherein the surface acoustic wave sensors arranged in the same compartment, each emit frequencies in a narrow frequency band, defined over an interval of 2 MHz.

5. System according to claim 1, wherein each electronic control unit is connected to a single antenna specific to it.

6. System according to claim 1, wherein each electronic control unit is connected to two antennas, with each one of these antennas being installed inside a compartment that is devoted to it.

7. System according to claim 1, wherein each surface acoustic wave sensor comprises an antenna specific to it.

8. System according to claim 1, wherein each surface acoustic wave sensor is installed on a part that is mobile.

9. System according to claim 1, wherein the sensors are arranged in the various compartments in such a way that sensors located in one compartment cannot communicate with an antenna installed in another compartment.

10. System according to claim 1, wherein the electronic control units are each installed outside or inside the compartment.

11. System according to claim 1, wherein the electronic control units are connected together by digital communication cables, at least one of said units being connected to monitoring equipment in such a way that all of said units can communicate with said equipment.

12. System according to claim 1, wherein the electronic control units communicate with monitoring equipment by the intermediary of a digital bus.

13. System according to claim 1, wherein each antenna uses ISM frequencies to communicate with the sensors that are associated with them.

14. System according to claim 13 wherein each antenna uses ISM frequencies between 433 MHz and 445 MHz.

15. System according to claim 13, wherein each antenna uses ISM frequencies ISM between 866 MHz and 890 MHz.

16. System according to claim 1, wherein each antenna uses frequencies between 423 MHz and 435 MHz, to communicate with the sensors that are associated to them.

17. System according to claim 1, wherein each antenna uses frequencies between 846 MHz and 870 MHz, to communicate with the sensors that are associated to them.

18. System according to claim 1, wherein each antenna used is a “

¼

wave”

antenna or PIFA.

19. Method for monitoring the physical and/or analog parameters concerning the parts of an engine, by calling up, by the intermediary of at least one antenna, a surface acoustic wave sensor located on one of said parts, comprising:

compartmentalizing the engine in such a way that each compartment comprises a plurality of parts of which the physical and/or analog parameters need to be monitored,

arranging on each of these parts to be monitored, a surface acoustic wave sensor, these sensors each having a distinct resonance frequency specific to them,

installing an antenna inside each compartment,

connecting each one of these antennas, alone or in pairs, to an electronic control unit,

calling up each sensor by simultaneously emitting, from each antenna (20a, . . . , 20f), a plurality of distinct frequencies close to the resonance frequencies of the sensors (101a, 102a, 103a, . . . , 101f, 102f, 103f) which are located in the engine compartment of said antenna, so as to simultaneously communicate with all of these sensors.