CONTRAIL DETECTION, DISCRIMINATION, AND CONTROL

    公开(公告)号:EP4371887A1

    公开(公告)日:2024-05-22

    申请号:EP23211108.8

    申请日:2023-11-21

    CPC classification number: G01W1/08 B64D45/00 B64G1/1042

    Abstract: A system includes a first sensor (102) positioned to sense presence of a contrail in a first volume (104), wherein the first volume at least partially overlaps an expected volume of a contrail (106) proximate an aircraft. A second sensor (108) is positioned to sense a background reference in a second volume (110), where the second volume (110) does not overlap the expected volume of a contrail (106) proximate an aircraft. A controller (118) is operatively connected to the first and second sensors (102, 108). The controller (118) includes machine readable instructions configured to cause the controller (118) to utilize data input from both the first and second volumes (104, 110) to determine if a contrail is present from the aircraft. A system includes machine readable instructions configured to cause the controller (118) to predict persistence of contrails on an intended route through the volume of airspace and to determine an improved route and/or propulsion operation to reduce contrail formation and persistence relative to the intended route.

    SYSTEM AND METHOD FOR MEASURING CLOUD PARAMETERS

    公开(公告)号:EP3581964A1

    公开(公告)日:2019-12-18

    申请号:EP19180002.8

    申请日:2019-06-13

    Abstract: Apparatus and associated methods relate to reliably determining both size of large water droplets and density of small water droplets in a multi-modal cloud atmosphere. A pulsed beam of light is projected into the cloud atmosphere and a receiver (26) receives a reflected portion of the projected pulsed beam backscattered by the cloud atmosphere. The received reflected portion is split into first and second parts. First and second parts are directed to first and second detectors (36H, 36L), each having a different gain. A ratio of the gains of the first and second detector (36H, 36L) is greater than 3:1, thereby providing a low-gain detector for producing unsaturated signals indicative of scintillation spike reflection by large water particles and a simultaneous high-gain detector for producing signals indicative of range-resolved reflections by numerous small water particles.

    MULTI-FIBER OPTICAL SENSOR FOR ICING
    4.
    发明公开
    MULTI-FIBER OPTICAL SENSOR FOR ICING 审中-公开
    多芯光纤传感器用于ICING

    公开(公告)号:EP3273269A1

    公开(公告)日:2018-01-24

    申请号:EP17182528.4

    申请日:2017-07-21

    Abstract: Apparatus and associated methods relate to sampling a large volume of a cloud atmosphere so as to obtain a large signal response from even a sparse distribution of water droplets in the cloud atmosphere. Such a volume can be probed by projecting an uncollimated optical beam into the cloud atmosphere and sampling the signal backscattered from the water droplets located within the probed volume. The uncollimated optical beam can be generated by projecting a diverging pulse of light energy from a polished end of a first optical fiber. A second optical fiber can be used to receive the optical signal backscattered from the cloud atmosphere. The second optical fiber can also have substantially the same field of view as the first optical fiber, so as to receive signals from a volume of the cloud atmosphere that is substantially commensurate with the probed volume.

    Abstract translation: 装置和相关方法涉及对大量云气氛进行取样,以便从云气氛中的水滴的稀疏分布甚至获得大的信号响应。 可以通过将未经过校正的光束投影到云气氛中并对从位于探测体积内的水滴反向散射的信号进行采样来探测这种体积。 未经校准的光束可以通过从第一光纤的抛光端投射光能的发散脉冲而产生。 第二根光纤可用于接收从云层大气反向散射的光信号。 第二光纤也可以具有与第一光纤基本相同的视场,以接收来自大体上与所探测的体积基本相称的云气氛的信号。

    OPTICALLY DETECTING CLOUD METRICS USING SAMPLED ANALOG MEASUREMENTS OF LIGHT REFLECTION
    5.
    发明公开
    OPTICALLY DETECTING CLOUD METRICS USING SAMPLED ANALOG MEASUREMENTS OF LIGHT REFLECTION 审中-公开
    使用光反射的样本模拟测量来光学检测云量度

    公开(公告)号:EP3222527A1

    公开(公告)日:2017-09-27

    申请号:EP17158328.9

    申请日:2017-02-28

    Abstract: Apparatus and associated methods relate to determining metrics of water particles in clouds by directing light pulses at a cloud and measuring a peak, a post-peak value and a high-frequency fluctuation of light signals reflected from the cloud. The light pulses include: a first pulse having circularly polarized light of a first wavelength; and a second pulse of a second wavelength. The reflected light signals include: a first reflected light signal having left-hand circular polarization of the first wavelength; a second reflected light signal having right-hand circular polarization of the first wavelength; and a third reflected light signal of the second wavelength. An extinction coefficient and a backscatter coefficient are determined based on the measured peak and post-peak slopes of the first and second reflected light signals. The measured high-frequency fluctuations of the three reflected light signals can be used to calculate cloud particle sizes.

    Abstract translation: 装置和相关方法涉及通过在云中引导光脉冲并测量从云反射的光信号的峰值,峰值后和高频波动来确定云中水粒子的度量。 光脉冲包括:具有第一波长的圆偏振光的第一脉冲; 和第二波长的第二脉冲。 反射光信号包括:具有第一波长的左旋圆偏振的第一反射光信号; 具有第一波长的右旋圆偏振的第二反射光信号; 和第二波长的第三反射光信号。 基于所测量的第一和第二反射光信号的峰值和峰值后斜率来确定消光系数和反向散射系数。 测得的三个反射光信号的高频波动可以用来计算云粒径。

    PREDICTING FAILURE AND ESTIMATING REMAINING USEFUL LIFE OF AN AIR-DATA-PROBE HEATER

    公开(公告)号:EP4067911A1

    公开(公告)日:2022-10-05

    申请号:EP22155691.3

    申请日:2022-02-08

    Abstract: Apparatus (22) and associated methods relate to predicting failure and/or estimating remaining useful life of an air-data-probe heater. Failure is predicted or useful life is estimated based on an electrical metric of the electrical operating power provided to a resistive heating element (24) of the air-data-probe heater. The electrical metric of the air data probe heater is one or more of: i) phase relation between voltage across the resistive heating element and leakage current, which is conducted from the resistive heating element to a conductive sheath surrounding the resistive heating element; ii) a time-domain profile of leakage current through the heating element insulation during a full power cycle; and/or iii) high-frequency components of the electrical current conducted by the resistive heating element and/or the voltage across the resistive heating element.

    CONTROLLED SAMPLING VOLUME OF CLOUDS FOR MEASURING CLOUD PARAMETERS

    公开(公告)号:EP3351967A3

    公开(公告)日:2018-08-08

    申请号:EP18152834.0

    申请日:2018-01-22

    Abstract: Apparatus and associated methods relate to determining a size and/or density of Super-cooled Large Droplets (SLDs) in a cloud atmosphere by comparing detected optical signals reflected from small and large sampling volumes of a cloud atmosphere. In some embodiments, an optical pulse is generated and divergently projected from a first optical fiber. A collimating lens (30) is aligned within the divergently projected optical pulse collimating a portion thereof. The collimated and uncollimated portions of the optical pulse are projected into the small and large sampling volumes of the cloud atmosphere, respectively. The ratio of the collimated to the uncollimated portions can be optically controlled. Signals corresponding to optical pulses having different collimated/uncollimated ratios are backscattered by the cloud atmosphere, detected and compared to one another. A processor is configured to calculate, based on scintillation spike differences between the optical pulses of different collimated/uncollimated ratios, a size and/or density of SLDs.

    PREDICTING FAILURE AND/OR ESTIMATING REMAINING USEFUL LIFE OF AN AIR-DATA-PROBE HEATER

    公开(公告)号:EP4067909A1

    公开(公告)日:2022-10-05

    申请号:EP22163589.9

    申请日:2022-03-22

    Abstract: Apparatus and associated methods relate to predicting failure and/or estimating remaining useful life of an air-data-probe heater. Failure is predicted or useful life is estimated based on an electrical metric of the electrical operating power provided to a resistive heating element (24) of the air-data-probe heater. The electrical metric of the air data probe heater is one or more of: i) phase relation between voltage across the resistive heating element (24) and leakage current, which is conducted from the resistive heating element (24) to a conductive sheath (36) surrounding the resistive heating element (24); ii) a time-domain profile of leakage current through the heating element insulation during a full power cycle; and/or iii) high-frequency components of the electrical current conducted by the resistive heating element (24) and/or the voltage across the resistive heating element (24).

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