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Ground detection method for IMU (Inertial Measurement Unit) collimation axis errors of area array camera

An area array camera and ground detection technology, applied in the field of aerial remote sensing positioning, can solve problems such as difficulty, high cost, and heavy workload, and achieve the effect of simple operation, low cost, and easy implementation

Active Publication Date: 2018-06-19
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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AI Technical Summary

Problems solved by technology

Currently existing detection methods need to be checked by flight or by laying out ground checkpoints and control points, which have limitations such as difficulty in implementation, heavy workload, high difficulty and high cost.

Method used

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  • Ground detection method for IMU (Inertial Measurement Unit) collimation axis errors of area array camera
  • Ground detection method for IMU (Inertial Measurement Unit) collimation axis errors of area array camera
  • Ground detection method for IMU (Inertial Measurement Unit) collimation axis errors of area array camera

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Embodiment 1

[0069] Examples of the invention refer to figure 1 with 2 As shown, it includes an IMU 1, an area scan camera 2, an inclination sensor 3, a first plane mirror 4, a second plane mirror 5, a theodolite 6, and a total station 7.

[0070] IMU 1 and area scan camera 2 are equipment to be tested, and the imaging object distance of area scan camera 2 is infinite; the inclination sensor 3 adopts the AVT2000T dual-axis inclination sensor produced by Wuxi Maike Co., which is used to level the first plane mirror 4; The first plane mirror 4 and the second plane mirror 5 are plane mirrors produced by Changchun Aopu Optoelectronics Technology Co., Ltd., whose surface accuracy is better than one-twentieth wavelength, used to deflect parallel light beams; theodolite 6 is a Leica The Leica TM5100A theodolite produced by the company is used to generate and detect parallel light beams and transmit the heading angle; the total station 7 is the GTA1300R gyro total station produced by Suzhou Yiguang Co...

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Abstract

The invention discloses a ground detection method for IMU (Inertial Measurement Unit) collimation axis errors of an area array camera. The ground detection method for the IMU collimation axis errors of the area array camera, disclosed by the invention, comprises the following steps: generating a parallel-light light beam; imaging in a direction vertical to the parallel-light light beam by adoptingthe area array camera to obtain a picpointed coordinate of the parallel-light light beam in an image space coordinate system plane; converting a direction vector of the parallel-light light beam in an image space coordinate system to a direction vector under a local horizontal coordinate system, and solving a pitch angle and a roll angle of the image space coordinate system relative to a navigation coordinate system; acquiring an azimuth angle of the image space coordinate system; acquiring an IMU collimation axis error angle. The ground detection method for the IMU collimation axis errors ofthe area array camera, provided by the invention, has the advantages of low cost, simplicity in operation and easiness for implementation.

Description

Technical field [0001] The invention relates to the technical field of aerial remote sensing positioning, in particular to a ground detection method for the collimation axis error of an area array camera IMU. Background technique [0002] The geometric positioning technology of aerial remote sensing can calculate the geographic coordinates of ground targets in aerial remote sensing images, which has important application value. Usually, an inertial measurement unit (English: Inertial Measurement Unit, IMU) is used to measure the attitude data of the aerial camera at the time of imaging. The IMU and the aerial camera are fixedly connected by mechanical components. Due to the limitation of processing and installation technology, it is difficult to achieve strict parallelism between the corresponding coordinate axes of the IMU coordinate system and the aerial camera image space coordinate system, resulting in a small angular deviation between the corresponding coordinate axes. Is t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C25/00
CPCG01C25/005
Inventor 杨永明郑丽娜修吉宏李昕阳匡海鹏
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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