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Test method for aircraft gimbal stability based on digital camera

A stability test, digital camera technology, applied in the field of aircraft and photogrammetry, can solve the problems of unclear gimbal shake of aircraft, unable to take pictures of target objects, etc., and achieve the effect of simple structure, strong versatility and easy disassembly

Active Publication Date: 2018-05-08
CHINA JILIANG UNIV
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AI Technical Summary

Problems solved by technology

This causes some aerial photos to become unclear due to the jitter of the aircraft gimbal. If the frequency and amplitude of the jitter are large, it may even appear that the target object cannot be captured at all.

Method used

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  • Test method for aircraft gimbal stability based on digital camera
  • Test method for aircraft gimbal stability based on digital camera
  • Test method for aircraft gimbal stability based on digital camera

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specific Embodiment

[0054] Such as figure 2 Shown, the specific embodiment of the present invention is as follows:

[0055] In specific implementation, the aircraft 4 adopts a quadrotor unmanned aerial vehicle with a size of 30x30x7.5cm. The digital camera 1 adopts a C-mount CMOS camera with Aptina CMOS sensor, and the camera pixels reach 20.3 million. The USB2.0 interface ensures a high transmission rate, and the continuous shooting speed is 6.0 pictures / second. The length, width and height of fixed support 2 are respectively 2m, and the telescopic support rod is adjustable. The logo image is taken as Figure 6 The black-and-white grid diagram shown has four marked dots at the four corners, and it is placed on the tarpaulin for Figure 7 shown.

[0056] Step 1, set up the device of the present invention, according to the direct linear transformation solution, set up a mathematical model based on the collinear conditional equation, solve the inner orientation parameter of the digital camera,...

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Abstract

The invention discloses an aircraft holder stability testing device and an aircraft holder stability testing method based on a digital camera. A fixed bracket is arranged on the periphery of an aircraft, the top part of the aircraft is fixed to the lower end of a supporting rod through a universal joint and is positioned at the center of the fixed bracket, an oilcloth is horizontally arranged at the bottom surface of a frame of the fixed bracket, a logo image is arranged on the oilcloth, the digital camera is in rigid connection with a body of the aircraft, and the aircraft and the digital camera are connected with a PC upper computer on the ground through a picture data transmission system; and the digital camera is calibrated firstly, a relation between a pixel position of an image of the digital camera and a logo point position on the oilcloth is established, the fixed bracket and the oilcloth are kept in parallel to the ground horizontally in flight, exterior orientation parameters are obtained through processing picture data acquired in real time, and the stability result of an aircraft holder is obtained through variance calculation. The aircraft holder stability testing device adopts the scientific and effective aircraft holder stability testing method for detection stability of the aircraft holder, is simple and reasonable in structure, high in universality and convenient to disassemble, and can be suitable for various kinds of aircraft holders.

Description

technical field [0001] The invention belongs to the technical field of photogrammetry, relates to the field of aircraft, and is mainly used for testing the stability and reliability of cloud platform products produced by various aircraft manufacturers. Background technique [0002] In recent years, domestic drones have developed rapidly, and there are more and more drone companies. In addition to military applications, due to the advantages of UAVs such as relatively low cost, no risk of casualties, strong survivability, good maneuverability, and ease of use, UAVs are widely used in aerial photography, geological surveys, high-voltage transmission line inspections, and oil field management. Road inspection, highway management, forest fire prevention inspection, poisonous gas survey, anti-drug, emergency rescue and ambulance and other civilian fields have extremely broad application prospects. If you want to take clear photos with the aircraft, in addition to the aircraft an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M13/00
CPCG01M13/00
Inventor 郑恩辉耿俊楠陈劲松富雅琼孙坚
Owner CHINA JILIANG UNIV
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