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1. 发明公开

EP3161440A1 A METHOD OF DETERMINING DEFORMATION IN A STRUCTURE 有权转让
标题翻译：一种确定结构变形的方法
公开(公告)号：EP3161440A1
公开(公告)日：2017-05-03
申请号：EP14734788.4
申请日：2014-06-26
申请人： Omnisens S.A.
发明人： BRIFFOD, Fabien , ROCHAT, Etienne
IPC分类号： G01L1/24 , G01B11/16
CPC分类号： G01L1/242 , F16L11/081 , G01B11/18 , G01M5/0091 , G01M11/085
摘要： A method of determining deformation in a structure around which a sensing optical fiber is helically wound, includes performing a distributed measurement at a point along the fiber, to obtain a frequency gain spectrum at that point. Performing a distributed measurement includes, adjusting a pulse width of a pulse pump signal to achieve a predefined spatial resolution and providing the pulse pump signal with adjusted pulse width in the fiber to generate scattering, which is used to obtain the frequency gain spectrum. Identifying at least two curves which, when added together, best fit the frequency gain spectrum. Identifying the frequency at which peaks of the curves occur. Determining deformation in the structure by determining deformation in the fiber at the point using a frequency at which a peak of an identified curve occurs. The amount of deformation in the fiber corresponds to the amount of deformation in the structure.
摘要翻译：确定感测光纤螺旋缠绕的结构中的变形的方法包括在沿着光纤的点处执行分布式测量以获得该点处的频率增益谱。执行分布式测量包括调整脉冲泵浦信号的脉冲宽度以实现预定义的空间分辨率并且向脉冲泵浦信号提供光纤中的经调整的脉冲宽度以产生散射，其用于获得频率增益谱。识别至少两条曲线，当它们加在一起时，最适合频率增益谱。确定曲线峰值出现的频率。通过使用确定曲线的峰值出现的频率确定该点处光纤中的变形来确定结构中的变形。纤维中的变形量对应于结构中的变形量。

2. 发明公开

EP2737290A1 A SENSOR AND METHOD FOR SENSING 有权
标题翻译：传感器与测量方法
公开(公告)号：EP2737290A1
公开(公告)日：2014-06-04
申请号：EP11767177.6
申请日：2011-07-27
申请人： Omnisens S.A.
发明人： GOSTELI, Julien , RAVET, Fabien , ROCHAT, Etienne
IPC分类号： G01L1/24 , G01M11/08 , G01D5/353 , G01M11/00
CPC分类号： G01N21/8806 , G01D5/35364 , G01L1/242 , G01M11/085 , G01M11/319 , G01M11/39
摘要： According to the invention, these aims are achieved by means of a sensor, suitable for sensing one or more properties of one or more structures, the sensor comprising,a first optical propagation path which is configurable to cooperate with a structure whose properties are to be sensed; a second optical propagation path which is configurable to cooperate with a structure whose properties are to be sensed; a third optical propagation path;a means for amplifying a signal which propagates in the third optical propagation path, so that the signal is amplified before it begins propagation along the second optical propagation path, and a means to prevent the propagation of signals from the second optical propagation path to the third optical propagation path. There is further provided a corresponding method of sensing.

3. 发明公开

EP4133318A1 SECTION AND ASSEMBLY COMPRISING A PLURALITY OF SUCH SECTIONS 审中-实审
公开(公告)号：EP4133318A1
公开(公告)日：2023-02-15
申请号：EP20719388.9
申请日：2020-04-10
申请人： Omnisens S.A.
发明人： ROCHAT, Etienne
IPC分类号： G02B6/38 , G02B6/44

4. 发明公开

EP3100005A1 OPTICAL DISTRIBUTED SENSING DEVICE AND METHOD FOR MEASUREMENTS OVER EXTENDED RANGES 审中-公开
标题翻译：光分布测量装置和方法先进地区的测量
公开(公告)号：EP3100005A1
公开(公告)日：2016-12-07
申请号：EP14705291.4
申请日：2014-01-27
申请人： Omnisens S.A.
发明人： ROCHAT, Etienne
IPC分类号： G01D5/353
CPC分类号： G01D5/35383 , G01D5/35364
摘要： The present invention concerns a distributed optical sensing device for doing distributed measurements along a measurement path, comprising a plurality of optical fiber based distributed sensing elements (10) arranged along said measurement path, and first optical linking means connected to a first end of said distributed sensing elements (10) and able to transfer separately measurement optical signals (13) emerging from different distributed sensing elements (10) towards detection means (18). The present invention concerns also a method for doing distributed measurements along a measurement path device.

5. 发明公开

EP3066423A1 SINGLE-END BRILLOUIN OPTICAL DISTRIBUTED SENSING DEVICE AND METHOD 有权
标题翻译：与单端布里渊光纤传感器及方法分布式检测装置
公开(公告)号：EP3066423A1
公开(公告)日：2016-09-14
申请号：EP13798946.3
申请日：2013-11-05
申请人： Omnisens S.A.
发明人： ROCHAT, Etienne , SANGHOON, Chin
IPC分类号： G01D5/353 , G01M11/00 , G01L1/24
CPC分类号： G01L1/242 , G01D5/35364 , G01K11/32 , G01K2011/322 , G01M11/319
摘要： The present invention concerns a Brillouin optical distributed sensing device, comprising (i) a distributed sensor with a polarization maintaining sensing optical fiber (10), (ii) optical coupling means (19, 21, 22) connected to a first end of said sensing optical fiber (10), and arranged so as to transfer into said sensing optical fiber (10) at least one linearly polarized first optical probe wave (18) aligned with a first birefringent axis and one linearly polarized optical pulsed pump wave (17) aligned with a second birefringent axis, and to transfer optical waves emerging from said sensing optical fiber (10) toward detection means (23), (iii) a light reflecting means (20) connected to a second end of the sensing optical fiber (10) and able to shift the direction of polarization of the reflected waves relative to the incident waves from one birefringent axis to the other. The present invention concerns also a method for doing distributed measurements of temperature, strain and radial pressure on a single fiber (10).

6. 发明公开

EP2946186A1 A SENSING CABLE 审中-公开
标题翻译：探测电缆
公开(公告)号：EP2946186A1
公开(公告)日：2015-11-25
申请号：EP13819036.8
申请日：2013-12-20
申请人： Omnisens S.A.
发明人： BALS, Ion , NIKLES, Marc , ROCHAT, Etienne
IPC分类号： G01L11/02
CPC分类号： G01L11/025
摘要： A sensing cable including one or more optical fibers and a coating which is provided on the one or more optical fibers. The coating is configured so that pressure applied to the sensing cable, along one or more axes, induces less lateral compression on the one or more optical fibers than pressure applied to the sensing cable along one or more other axes so as to change birefringence in the one or more optical fibers.

7. 发明公开

EP2906968A1 METHOD FOR MONITORING SOIL EROSION AROUND BURIED DEVICES, INSTRUMENTED DEVICE AND SYSTEM IMPLEMENTING THE METHOD 审中-公开
标题翻译：程序对监测，以掩埋器件土壤侵蚀，仪器设备和系统用于实现该方法
公开(公告)号：EP2906968A1
公开(公告)日：2015-08-19
申请号：EP12786855.2
申请日：2012-10-11
申请人： Omnisens S.A.
发明人： ROCHAT, Etienne
IPC分类号： G01V9/00 , H02G9/02
CPC分类号： G01B21/085 , G01B21/18 , G01K11/32 , G01V9/005
摘要： The present invention concerns a method for monitoring the thickness of soil (6) between a soil surface (8) and a device (4) buried in said soil (6), possibly underwater, the device (4) comprising at least one heat source (1), the method comprising steps of (i) measuring at least one temperature using at least one temperature sensing element (3) located in the vicinity of the heat source(s) (1), and (ii) calculating an estimated soil thickness using a pre-determined thermal distribution function (20) which links measured temperatures and soil thickness. The present invention concerns also an instrumented device (4) and a system implementing the method.

8. 发明公开

EP2861947A1 A METHOD AND DEVICE FOR PRESSURE SENSING 有权
标题翻译：一种用于压力感测的方法和装置
公开(公告)号：EP2861947A1
公开(公告)日：2015-04-22
申请号：EP12728224.2
申请日：2012-06-13
申请人： Omnisens S.A.
发明人： CHIN, Sanghoon , ROCHAT, Etienne
IPC分类号： G01L1/24
摘要： A method for performing distributed pressure sensing including the steps of, forming a grating in a birefringent fiber, measuring the birefringence distribution along the length of the birefringent fiber, and determining pressure present along the length of the fiber using the measured the birefringence distribution. The invention also relates to a corresponding sensing device.
摘要翻译：一种用于执行分布式压力感测的方法，包括以下步骤：在双折射光纤中形成光栅，测量沿双折射光纤长度的双折射分布，以及使用测量的双折射分布确定沿光纤长度存在的压力。本发明还涉及相应的传感装置。

9. 发明公开

EP4273509A1 DEVICE AND METHOD FOR DISTRIBUTED SENSING, PREFERABLY IN A STAR NETWORK 审中-实审
公开(公告)号：EP4273509A1
公开(公告)日：2023-11-08
申请号：EP22171178.1
申请日：2022-05-02
申请人： Omnisens S.A.
发明人： ROCHAT, Etienne , GOY, Alexandre
IPC分类号： G01D5/353
摘要： The invention concerns a device (101) for distributed sensing comprising:
- a pump generator (1) for generating a optical pump signal,
- A pump splitter (2) configured to split the pump signal in a number N of channels (3), each channel comprising an optical fiber (31) or a connector (32) arranged for connecting an optical fiber,
- A controller configured to control the pump splitter,
- An optical receiver (4) a backscattered signal from the optical fiber or from the connector of each channel,
characterized in that:
- the pump splitter comprises a gating system comprising a gate (21) for each channel among the N channels, each gate associated to a given channel being arranged for having :
o an open state allowing the pump signal to go from the pump generator to the optical fiber or the connector of the associated channel, and
o a closed state for which the pump signal cannot go from the pump generator to the optical fiber or the connector of the associated channel..

Application to distributed sensors.

10. 发明公开

EP4166914A1 METHOD AND DEVICE FOR MEASURING A TEMPERATURE AND/OR A STRAIN IN AN OPTICAL FIBER 审中-实审
公开(公告)号：EP4166914A1
公开(公告)日：2023-04-19
申请号：EP22202336.8
申请日：2022-10-18
申请人： Omnisens S.A.
发明人： GOY, Alexandre , ROCHAT, Etienne , VIDAL MORENO, Pedro José , GONZALEZ HERRAEZ, Miguel
IPC分类号： G01D5/353 , G01D18/00
摘要： The invention concerns a method for measuring a temperature and/or a strain in an optical fiber (11), comprising the steps of: calibrating (31) the optical fiber (11) by measuring a signal (21, 22, 23, 24) sensitive to an intensity and a phase of a Rayleigh backscattering signal of the optical fiber at a known state of temperature and a known state of strain; measuring (32) the signal (25) sensitive to an intensity and a phase of a Rayleigh backscattering signal of the optical fiber (11) at an unknown state of temperature and/or an unknown state of strain; and, based on a shift of frequency or a correlation between:
- the signal sensitive to the intensity and the phase of a Rayleigh backscattering signal of the optical fiber at a known state of temperature and a known state of strain, and
- the signal sensitive to the intensity and the phase of a Rayleigh backscattering signal of the optical fiber at an unknown state of temperature and/or an unknown state of strain,
determining, by technical means, the absolute value of the unknown state of temperature and/or the unknown state of strain, for at least one longitudinal position (26) inside the optical fiber (11).

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