A system for detecting the presence of ice in a total-air-temperature probe with which an aircraft is equipped monitors the slope of total-air-temperature measurements carried out by the total-air-temperature probe, and monitors the slope of a temperature differential, which is the difference between a static-air-temperature value and a temperature value according to the ISA model, determined depending on the altitude of the aircraft. The presence of ice in the total-air-temperature probe is detected when the total air temperature measured by the total-air-temperature probe exhibits a positive slope higher than a first predefined positive threshold and when in addition the temperature differential simultaneously exhibits a positive slope higher than a second predefined positive threshold. Thus, the detection of the presence of ice is possible whatever the flight phase of the aircraft.

A system for detecting the presence of ice in a total-air-temperature probe with which an aircraft is equipped monitors the slope of total-air-temperature measurements carried out by the total-air-temperature probe, and monitors the slope of a temperature differential, which is the difference between a static-air-temperature value and a temperature value according to the ISA model, determined depending on the altitude of the aircraft. The presence of ice in the total-air-temperature probe is detected when the total air temperature measured by the total-air-temperature probe exhibits a positive slope higher than a first predefined positive threshold and when in addition the temperature differential simultaneously exhibits a positive slope higher than a second predefined positive threshold. Thus, the detection of the presence of ice is possible whatever the flight phase of the aircraft.

Methods, systems, and devices are disclosed for implementing an exemplary immersion mode ice spectrometer. In order to increase sample throughput and improve accuracy of Ice Nucleating Particle (INP) freezing temperature measurement, the exemplary immersion mode ice spectrometer both increases sample cooling rates and monitors changes in optical properties of water droplets during freezing.

Methods, systems, and devices are disclosed for implementing an exemplary immersion mode ice spectrometer. In order to increase sample throughput and improve accuracy of Ice Nucleating Particle (INP) freezing temperature measurement, the exemplary immersion mode ice spectrometer both increases sample cooling rates and monitors changes in optical properties of water droplets during freezing.

A vision system for monitoring areas of interest having a system for receiving an optical input, outputting a signal, and processing the signal. The system is configured to measure the radiance in spectral bands in which solar radiation is reduced substantially due to absorption by atmospheric constituents. This mitigates the negative effects of solar radiation such as sun glare. The system is configured to output a resultant detection signal in response to the measurements in the spectral bands selected.

A vision system for monitoring areas of interest having a system for receiving an optical input, outputting a signal, and processing the signal. The system is configured to measure the radiance in spectral bands in which solar radiation is reduced substantially due to absorption by atmospheric constituents. This mitigates the negative effects of solar radiation such as sun glare. The system is configured to output a resultant detection signal in response to the measurements in the spectral bands selected.

Embodiments of the present disclosure relate to a device and a method for recognising the attachment of ice to a structure (110) of a construction (100). The device comprises at least one acceleration sensor (10) that is arranged and configured to detect an acceleration on the structure; an evaluation device (30) for determining at least one natural frequency of the structure (110) from the detected acceleration, wherein the evaluation device (30) is configured to indirectly detect attachment of ice to said structure (110) on the basis of the determined natural frequency of the structure (110); and at least one ice detection sensor (20, 20a, 20b) that is arranged and configured to directly detect attachment of ice at a position on said structure (110), wherein the evaluation device (30) combines the indirect detection of the attachment of ice and the direct detection of the attachment of ice.

Embodiments of the present disclosure relate to a device and a method for recognising the attachment of ice to a structure (110) of a construction (100). The device comprises at least one acceleration sensor (10) that is arranged and configured to detect an acceleration on the structure; an evaluation device (30) for determining at least one natural frequency of the structure (110) from the detected acceleration, wherein the evaluation device (30) is configured to indirectly detect attachment of ice to said structure (110) on the basis of the determined natural frequency of the structure (110); and at least one ice detection sensor (20, 20a, 20b) that is arranged and configured to directly detect attachment of ice at a position on said structure (110), wherein the evaluation device (30) combines the indirect detection of the attachment of ice and the direct detection of the attachment of ice.

A hazard warning system can be utilized in an aircraft. The hazard warning system can include a processing system configured to determine an icing condition. The icing condition can be annunciated and/or displayed. An avionic display can be used to display the icing condition in response to a sum of icing concentration factors along a radial or flight path.

A hazard warning system can be utilized in an aircraft. The hazard warning system can include a processing system configured to determine an icing condition. The icing condition can be annunciated and/or displayed. An avionic display can be used to display the icing condition in response to a sum of icing concentration factors along a radial or flight path.