Multi-camera-assisted airborne distributed pos flexible baseline measurement method and device
A measurement method and multi-camera technology, applied in the measurement field, can solve the problems of no flexible lever arm, limited subsystem, low alignment accuracy, etc.
Active Publication Date: 2019-12-24
BEIHANG UNIV
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[0005] In order to solve the problem that in the prior art, no detailed flexible arm measurement algorithm is provided, which will directly limit the position and attitude measurement accuracy of the subsystem, the embodiment of the present invention provides a multi-camera-assisted airborne distributed POS flexible baseline measurement The method and device overcome the uncertainty of traditional deflection deformation modeling, and the shortcomings of low alignment accuracy of traditional initial alignment methods under dynamic conditions, so that they have the characteristics of high precision and strong anti-interference ability, and can be used to measure the deflection of the carrier aircraft. The flexible baseline length between multiple loads during curved deformation improves the relative position and attitude accuracy between multiple loads
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[0039] The present application will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0040] In the following introduction, the terms "first" and "second" are only used for the purpose of description, and should not be understood as indicating or implying relative importance. The following description provides multiple embodiments of the present invention, and different embodiments can be replaced or combined in combination, so this application can also be considered to include all possible combinations of the same and / or different embodiments described. Thus, if one embodiment contains features A, B, C, and another embodiment contains features B, D, then the application should also be considered to include all other possible combinations containing one or more of A, B, C, D Although this embodiment may not be clearly written in the following content.
[0041] An embodiment of the present invention provides a multi-camera-as...
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The invention discloses a method for measuring an airborne distribution type POS (point of sale) flexibility base line assisted by multiple cameras. The method comprises the following steps: performing transfer alignment on a low-accuracy sub-inertial measurement unit (sub-IMU) with the help of relative position posture information between a main IMU and the sub-IMU measured by the cameras by using a high-accuracy main inertial measurement unit (main IMU) to complete flexible multi-base line measurement. The method has the characteristics of high accuracy and strong anti-interference capacity,can be used for measuring flexible base line lengths between multiple loads when a carrier aircraft has flexural deflection, and improves the accuracy of the relative position posture between multiple loads. The invention further discloses a device for measuring the airborne distribution type POS flexibility base line assisted by the multiple cameras.
Description
technical field [0001] The invention relates to the field of measurement technology, in particular to a multi-camera assisted airborne distributed POS flexible baseline measurement method and device. Background technique [0002] High-precision POS consists of an inertial measurement unit (Inertial measurement Unit, IMU), a navigation computer system (POS Computer System, PCS) and GPS. High-precision POS can provide high-frequency, high-precision time, space, and precision information for high-resolution aerial remote sensing systems. Improving imaging accuracy and efficiency through motion error compensation is the key to high-resolution imaging. my country has made some progress in single POS imaging, but due to the demand for earth observation loads, such as integrating high-resolution surveying and mapping cameras, full-spectrum imaging spectrometers, and multi-task loads of SAR on the same carrier, airborne distributed array antenna SAR And flexible multi-baseline inter...
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IPC IPC(8): G01C25/00G01C21/16
CPCG01C21/16G01C25/005
Inventor 刘刚顾宾李建利刘占超朱庄生房建成卢兆兴
Owner BEIHANG UNIV