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Coaxial double-rotor blade tip distance measurement system and method based on ultrasonic measurement

A coaxial dual-rotor, distance measurement technology, used in measurement devices, using ultrasonic/sonic/infrasonic waves, aircraft component testing, etc., to achieve the effect of compensating errors and increasing measurement frequency

Pending Publication Date: 2022-04-12
TIANJIN UNIV
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Problems solved by technology

[0004] The present invention aims to solve the problem of real-time measurement of the blade tip distance when the upper and lower blades of the coaxial dual-rotor helicopter meet, and provides a new measurement system and measurement method for the high-speed dynamic real-time measurement of the distance between two random points in space

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  • Coaxial double-rotor blade tip distance measurement system and method based on ultrasonic measurement
  • Coaxial double-rotor blade tip distance measurement system and method based on ultrasonic measurement
  • Coaxial double-rotor blade tip distance measurement system and method based on ultrasonic measurement

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Embodiment Construction

[0055] In order to further understand the content of the invention, features and effects of the present invention, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings:

[0056] Such as figure 1 As shown, the application takes the four-blade coaxial dual-rotor helicopter as an example, and the coaxial dual-rotor helicopter includes an upper rotor 1 and a lower rotor 2 and a fuselage 3 with opposite directions of rotation and equal rotating speeds. Upper rotor 1 comprises 4 upper blades, and lower rotor 2 comprises 4 lower blades. The upper rotor 1 and the lower rotor 2 have converging moments during the rotation process, and there are 8 converging phases, that is, for each upper blade, the upper blade will be connected with different lower blades of the lower rotor in the 8 converging phases. Convergence occurs, and the coaxial dual-rotor blade tip distance measurement system completes the vertical distance H...

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Abstract

The invention discloses a coaxial double-rotor blade tip distance measurement system based on ultrasonic measurement. The coaxial double-rotor blade tip distance measurement system comprises an ultrasonic transmitting and receiving unit, a signal transmission unit, an ultrasonic signal processing unit and a sound velocity compensation unit. The invention also discloses a measurement method based on the measurement system, which comprises the following steps of: improving the measurement frequency of ultrasonic distance measurement by adopting an ultrasonic coding method, expanding the measurement range by adopting an ultrasonic measurement window method, installing the ultrasonic transmitting device at the upper blade tip position of the helicopter blade to be measured, and installing the ultrasonic receiving device at the lower blade tip position of the helicopter blade to be measured. The signals are transmitted to the ultrasonic signal processing unit through the signal transmission unit, the real-time blade tip distance is obtained after the signals are processed by the ultrasonic signal processing unit, and tangential errors generated by measurement are corrected.

Description

technical field [0001] The present invention relates to a high-speed dynamic real-time measurement technology for the distance between two random points in space, in particular to a real-time measurement system and method for the distance between the upper and lower blade tips of a coaxial dual-rotor helicopter based on ultrasonic measurement when the upper and lower blades meet. Background technique [0002] Compared with single-rotor helicopters, coaxial twin-rotor helicopters have the advantages of small size, compact structure, high weight efficiency, and good maneuverability, and are widely used in military applications such as ship-borne helicopters. At the same time, due to the compact shape, small outline size and large ceiling of the coaxial dual-rotor, it has smaller radar identification features and bomb-receiving surfaces in the battlefield environment. The coaxial dual-rotor system improves the safety factor when the rotor is damaged in battle and enhances battl...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B17/00B64F5/60
Inventor 裘祖荣路遥环张志远裘臻胡文川刘佳琛
Owner TIANJIN UNIV
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