A zero-position correction method for airborne photoelectric detection equipment

Abstract

The invention relates to a zero correction method for airborne photoelectric detection equipment. According to the method, a measuring point arranged on an airplane body and the position of a photoelectric detection equipment sensor are known, the measuring point on the airplane body is measured through a laser tracker, an airplane structure horizontal plane and an airplane structure horizontal line are formed, and an airplane body coordinate system is established; a straight line passing through the optical center of the photoelectric detection equipment sensor and the center of a target ballis formed, the included angle, namely a standard pitch angle, between the straight line and the airplane construction horizontal plane is calculated, and the included angle, namely a standard azimuthangle, between the projection line of the straight line on the airplane reference horizontal plane and the airplane axis is calculated; and at the same time, the photoelectric detection equipment aims at the same target ball in front of the airplane, the pitch angle and the azimuth angle displayed in a display on the airplane are read, the standard pitch angle and the azimuth angle are subtractedfrom the pitch angle and the azimuth angle respectively, and a pitch angle difference value and an azimuth angle difference value are manually added into the photoelectric detection equipment to realize zero correction of the photoelectric detection equipment.

Description

technical field [0001] The invention relates to the detection and correction technology of airborne equipment in aircraft manufacturing, in particular to a zero correction method for airborne photoelectric detection equipment. Background technique [0002] Airborne photoelectric detection equipment is a complex opto-mechanical automatic control system, which is mainly used to search, aim, track and measure the target, realize the detection of the target and the precise delivery of weapons, usually including infrared, TV and laser detection device. In order to achieve the best detection and aiming accuracy, it is necessary to calibrate the zero position of the optical axis of the infrared or television detectors of the airborne photoelectric detection equipment in parallel with the horizontal line of the aircraft structure, that is, zero position calibration (referred to as target calibration). At present, the traditional method still used in the calibration of airborne phot...

AI Technical Summary

Problems solved by technology

[0004] 1. The target board is bulky and heavy, and it is very inconvenient to store, transport and use the target board, which is not conducive to user use and maintenance;

[0005] 2. The accuracy of the target calibration is low. Due to the large windward area of ​​the target, it is easy to be affected by the gust of wind in the open-air environment and swing, or even overturn, which seriously affects the accuracy of the calibration;

[0006] 3. The efficiency of target plate calibration is low. Before each target calibration, the aircraft needs to adjust the level, which takes a long time and low efficiency; the target plate takes a long time to place, and the accuracy of the position depends on the accuracy of human eyes or measuring instruments. difficult to guarantee stability;

[0007] 4. Poor versatility. Different types of aircraft and different types of airborne photoelectric detection equipment have different target board sizes and bullseye positions. For active aircraft with modified photoelectricity, the installation position may not be guaranteed to be on the nose of the aircraft If the optoelectronics are installed behind the front landing gear, the front landing gear will block the sight of the target board when using the traditional method of target calibration, which will seriously affect the accuracy of target calibration and even make it impossible to perform target calibration.

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