An ultra-high-precision icing detection device and its real-time detection method for icing thickness

Abstract

The invention discloses an ultra-high-precision freezing detecting device and a real-time freezing thickness detecting method thereof. The ultra-high-precision freezing detecting device comprises a wideband light source, a spectrum analyzer, an optical fiber coupler, a film-coated optical fiber, an optical fiber polarization controller, an optical switch and optical fiber probes. The wideband light source and the spectrum analyzer are connected to a port a and a port b which are located on the same side of the optical fiber coupler through optical fibers respectively. The film-coated optical fiber is installed on the optical fiber polarization controller and connected to a port c located on the other side of the optical fiber coupler. The input end of the optical switch is connected to a port d of the optical fiber coupler and the output end of the optical switch is connected with the optical fiber probes. The ultra-high-precision freezing detecting device can realize ultra-high-precision detection of a micrometer-level-thickness ice layer on the surface of an object and accurately forecast the freezing rate. In addition, the device is high in integration degree, low in cost, capable of realizing distributed real-time detection, particularly suitable for airplane freezing detection, capable of realizing safety early warning and capable of being widely applied to other fields in need of freezing condition detection or monitoring.

Description

technical field [0001] The invention relates to the technical field of optical detection, in particular to an ultra-high-precision icing detection device and a method for detecting icing thickness in real time. Background technique [0002] Aircraft icing refers to the phenomenon of the accumulation of moisture on the outer surface of an aircraft during flight and freezing into ice. Icing can lead to the deterioration of aircraft power, loss of balance, impede visual flight, affect communication, and even directly damage aircraft components, bringing major hidden dangers to flight safety, and is one of the main reasons for air crashes. Therefore, the anti-icing and de-icing technology of aircraft has always been an important subject of aircraft system design. The high-precision icing detection technology is a key component of the airborne icing safety protection system, which is of great significance for ensuring the safe flight of aircraft. [0003] At present, a large nu...

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Problems solved by technology

[0008] The Chinese utility model patent "An Optical Fiber Icing Sensor" (CN202075225U) improves the above scheme and proposes a dual-probe structure, including an ice thickness measurement probe and an icing type identification probe, which can effectively identify the icing of the aircraft type, but there are still problems of small measurement range and low precision, the minimum detection limit of the ice layer is about 0.1mm

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