Rotating body surface non-contact icing detector

An ice detector, non-contact technology, applied in the field of photoelectric sensors, can solve the problems of backward development and unseen, and achieve the effect of convenient installation

Inactive Publication Date: 2010-08-04
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technology belongs to indirect measurement, and there is no report of practical application.
[0003] Domestic helicopter rotor icing detec

Method used

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  • Rotating body surface non-contact icing detector
  • Rotating body surface non-contact icing detector
  • Rotating body surface non-contact icing detector

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Embodiment Construction

[0013] Combine now Figure 1 to Figure 5 A specific embodiment of the present invention will be described in detail.

[0014] exist figure 1 Among them, the square wave is generated by the signal generator 12, in addition to driving the laser 2 to generate laser pulses through the laser driver 1, and at the same time as a reference signal to the synchronous integrator 6 and as an interrupt signal to the digital signal processor 11. When no icing occurs, the emitted light is sent to the rotor or the surface of the rotating object through the laser probe, and is reflected back with strong reflected light, and the photodetector 3 can detect a relatively strong light signal. When the rotating object detects ice on the surface, the emitted light at this wavelength is partially absorbed by the ice layer and reflected back as relatively weak reflected light, and the photodetector 3 detects a relatively weak optical signal. The photodetector 3 converts the optical signal into an ele...

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PUM

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Abstract

The invention relates to a rotating body surface non-contact icing detector. A signal generator drives a laser probe to generate laser pulses emitted to the surface of a rotating body; a photoelectric detector receives returned optical signals and converts the optical signals into electrical signals; the electrical signals are divided into two paths after signal amplification and improvement on signal to noise ratio; one path reaches a signal processor through a high threshold comparator and a high threshold stretcher, and is used for judging distribution range of chordwise icing on the surface of the rotating body; the other path reaches the signal processor through a low threshold comparator and a low threshold stretcher, and is used for judging transit time that the surface of the rotating body passes the upper side of the probe of photoelectric detector; and the signal processor generates icing alarm signals according to judgment results of both paths of signals and outputs the icing alarm signals to an alarm circuit. The icing detector directly detects the icing state and the icing range on the surface of a detected object in a non-contact way, avoids transmitting movable component measuring signals, and is suitable for detecting the icing state on the surface of helicopter rotor wings and surfaces of other rotating bodies in real time.

Description

technical field [0001] The invention relates to a photoelectric sensor, in particular to a non-contact icing detector on the surface of a rotating object, which is used for real-time detection of the icing conditions on the surface of helicopter rotors and other rotating objects. Background technique [0002] At present, there are mainly the following five methods for helicopter rotor icing in foreign countries: (1) The passive infrared detection method for helicopter rotor icing uses infrared detectors to detect the heat released when supercooled water droplets freeze on the surface of the helicopter rotor, and obtain the corresponding helicopter rotor icing information. This method requires a high-sensitivity infrared detector, which is not only expensive, but also easily interfered by the external environment, which affects the measurement results. (2) The helicopter rotor icing detection method based on time domain reflection is to stick a transmission wire on the surfa...

Claims

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Application Information

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IPC IPC(8): B64D15/20G08B19/02
Inventor 张杰叶林张洪郑英葛俊锋
Owner HUAZHONG UNIV OF SCI & TECH
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